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6205 lines
208 KiB
C
6205 lines
208 KiB
C
/*----------------------------------------------------------------------------/
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/ FatFs - Generic FAT Filesystem Module R0.13 /
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/-----------------------------------------------------------------------------/
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/
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/ Copyright (C) 2017, ChaN, all right reserved.
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/
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/ FatFs module is an open source software. Redistribution and use of FatFs in
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/ source and binary forms, with or without modification, are permitted provided
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/ that the following condition is met:
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/
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/ 1. Redistributions of source code must retain the above copyright notice,
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/ this condition and the following disclaimer.
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/
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/ This software is provided by the copyright holder and contributors "AS IS"
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/ and any warranties related to this software are DISCLAIMED.
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/ The copyright owner or contributors be NOT LIABLE for any damages caused
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/ by use of this software.
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/
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/----------------------------------------------------------------------------*/
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#include "ff.h" /* Declarations of FatFs API */
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#include "diskio.h" /* Declarations of device I/O functions */
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/*--------------------------------------------------------------------------
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Module Private Definitions
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---------------------------------------------------------------------------*/
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#if FF_DEFINED != 87030 /* Revision ID */
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#error Wrong include file (ff.h).
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#endif
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/* ASCII code support macros */
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#define IsUpper(c) ((c) >= 'A' && (c) <= 'Z')
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#define IsLower(c) ((c) >= 'a' && (c) <= 'z')
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#define IsDigit(c) ((c) >= '0' && (c) <= '9')
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/* Additional file attribute bits for internal use */
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#define AM_VOL 0x08 /* Volume label */
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#define AM_LFN 0x0F /* LFN entry */
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#define AM_MASK 0x3F /* Mask of defined bits */
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/* Additional file access control and file status flags for internal use */
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#define FA_SEEKEND 0x20 /* Seek to end of the file on file open */
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#define FA_MODIFIED 0x40 /* File has been modified */
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#define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */
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/* Name status flags in fn[11] */
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#define NSFLAG 11 /* Index of the name status byte */
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#define NS_LOSS 0x01 /* Out of 8.3 format */
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#define NS_LFN 0x02 /* Force to create LFN entry */
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#define NS_LAST 0x04 /* Last segment */
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#define NS_BODY 0x08 /* Lower case flag (body) */
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#define NS_EXT 0x10 /* Lower case flag (ext) */
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#define NS_DOT 0x20 /* Dot entry */
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#define NS_NOLFN 0x40 /* Do not find LFN */
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#define NS_NONAME 0x80 /* Not followed */
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/* Limits and boundaries */
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#define MAX_DIR 0x200000 /* Max size of FAT directory */
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#define MAX_DIR_EX 0x10000000 /* Max size of exFAT directory */
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#define MAX_FAT12 0xFF5 /* Max FAT12 clusters (differs from specs, but correct for real DOS/Windows behavior) */
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#define MAX_FAT16 0xFFF5 /* Max FAT16 clusters (differs from specs, but correct for real DOS/Windows behavior) */
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#define MAX_FAT32 0x0FFFFFF5 /* Max FAT32 clusters (not specified, practical limit) */
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#define MAX_EXFAT 0x7FFFFFFD /* Max exFAT clusters (differs from specs, implementation limit) */
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/* FatFs refers the FAT structure as simple byte array instead of structure member
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/ because the C structure is not binary compatible between different platforms */
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#define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */
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#define BS_OEMName 3 /* OEM name (8-byte) */
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#define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */
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#define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */
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#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */
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#define BPB_NumFATs 16 /* Number of FATs (BYTE) */
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#define BPB_RootEntCnt 17 /* Size of root directory area for FAT [entry] (WORD) */
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#define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */
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#define BPB_Media 21 /* Media descriptor byte (BYTE) */
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#define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */
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#define BPB_SecPerTrk 24 /* Number of sectors per track for int13h [sector] (WORD) */
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#define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */
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#define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */
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#define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */
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#define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */
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#define BS_NTres 37 /* WindowsNT error flag (BYTE) */
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#define BS_BootSig 38 /* Extended boot signature (BYTE) */
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#define BS_VolID 39 /* Volume serial number (DWORD) */
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#define BS_VolLab 43 /* Volume label string (8-byte) */
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#define BS_FilSysType 54 /* Filesystem type string (8-byte) */
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#define BS_BootCode 62 /* Boot code (448-byte) */
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#define BS_55AA 510 /* Signature word (WORD) */
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#define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */
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#define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */
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#define BPB_FSVer32 42 /* FAT32: Filesystem version (WORD) */
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#define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */
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#define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */
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#define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */
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#define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */
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#define BS_NTres32 65 /* FAT32: Error flag (BYTE) */
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#define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */
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#define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */
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#define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */
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#define BS_FilSysType32 82 /* FAT32: Filesystem type string (8-byte) */
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#define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */
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#define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */
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#define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */
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#define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */
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#define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */
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#define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */
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#define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */
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#define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */
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#define BPB_RootClusEx 96 /* exFAT: Root directory start cluster (DWORD) */
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#define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */
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#define BPB_FSVerEx 104 /* exFAT: Filesystem version (WORD) */
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#define BPB_VolFlagEx 106 /* exFAT: Volume flags (BYTE) */
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#define BPB_ActFatEx 107 /* exFAT: Active FAT flags (BYTE) */
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#define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in unit of byte (BYTE) */
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#define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in unit of sector (BYTE) */
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#define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */
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#define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */
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#define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */
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#define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */
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#define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */
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#define DIR_Name 0 /* Short file name (11-byte) */
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#define DIR_Attr 11 /* Attribute (BYTE) */
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#define DIR_NTres 12 /* Lower case flag (BYTE) */
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#define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */
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#define DIR_CrtTime 14 /* Created time (DWORD) */
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#define DIR_LstAccDate 18 /* Last accessed date (WORD) */
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#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */
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#define DIR_ModTime 22 /* Modified time (DWORD) */
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#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */
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#define DIR_FileSize 28 /* File size (DWORD) */
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#define LDIR_Ord 0 /* LFN: LFN order and LLE flag (BYTE) */
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#define LDIR_Attr 11 /* LFN: LFN attribute (BYTE) */
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#define LDIR_Type 12 /* LFN: Entry type (BYTE) */
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#define LDIR_Chksum 13 /* LFN: Checksum of the SFN (BYTE) */
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#define LDIR_FstClusLO 26 /* LFN: MBZ field (WORD) */
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#define XDIR_Type 0 /* exFAT: Type of exFAT directory entry (BYTE) */
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#define XDIR_NumLabel 1 /* exFAT: Number of volume label characters (BYTE) */
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#define XDIR_Label 2 /* exFAT: Volume label (11-WORD) */
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#define XDIR_CaseSum 4 /* exFAT: Sum of case conversion table (DWORD) */
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#define XDIR_NumSec 1 /* exFAT: Number of secondary entries (BYTE) */
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#define XDIR_SetSum 2 /* exFAT: Sum of the set of directory entries (WORD) */
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#define XDIR_Attr 4 /* exFAT: File attribute (WORD) */
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#define XDIR_CrtTime 8 /* exFAT: Created time (DWORD) */
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#define XDIR_ModTime 12 /* exFAT: Modified time (DWORD) */
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#define XDIR_AccTime 16 /* exFAT: Last accessed time (DWORD) */
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#define XDIR_CrtTime10 20 /* exFAT: Created time subsecond (BYTE) */
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#define XDIR_ModTime10 21 /* exFAT: Modified time subsecond (BYTE) */
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#define XDIR_CrtTZ 22 /* exFAT: Created timezone (BYTE) */
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#define XDIR_ModTZ 23 /* exFAT: Modified timezone (BYTE) */
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#define XDIR_AccTZ 24 /* exFAT: Last accessed timezone (BYTE) */
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#define XDIR_GenFlags 33 /* exFAT: General secondary flags (BYTE) */
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#define XDIR_NumName 35 /* exFAT: Number of file name characters (BYTE) */
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#define XDIR_NameHash 36 /* exFAT: Hash of file name (WORD) */
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#define XDIR_ValidFileSize 40 /* exFAT: Valid file size (QWORD) */
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#define XDIR_FstClus 52 /* exFAT: First cluster of the file data (DWORD) */
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#define XDIR_FileSize 56 /* exFAT: File/Directory size (QWORD) */
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#define SZDIRE 32 /* Size of a directory entry */
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#define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */
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#define RDDEM 0x05 /* Replacement of the character collides with DDEM */
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#define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
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#define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */
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#define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */
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#define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */
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#define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */
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#define MBR_Table 446 /* MBR: Offset of partition table in the MBR */
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#define SZ_PTE 16 /* MBR: Size of a partition table entry */
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#define PTE_Boot 0 /* MBR PTE: Boot indicator */
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#define PTE_StHead 1 /* MBR PTE: Start head */
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#define PTE_StSec 2 /* MBR PTE: Start sector */
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#define PTE_StCyl 3 /* MBR PTE: Start cylinder */
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#define PTE_System 4 /* MBR PTE: System ID */
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#define PTE_EdHead 5 /* MBR PTE: End head */
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#define PTE_EdSec 6 /* MBR PTE: End sector */
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#define PTE_EdCyl 7 /* MBR PTE: End cylinder */
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#define PTE_StLba 8 /* MBR PTE: Start in LBA */
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#define PTE_SizLba 12 /* MBR PTE: Size in LBA */
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/* Post process after fatal error on file operation */
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#define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
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/* Reentrancy related */
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#if FF_FS_REENTRANT
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#if FF_USE_LFN == 1
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#error Static LFN work area cannot be used at thread-safe configuration
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#endif
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#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
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#else
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#define LEAVE_FF(fs, res) return res
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#endif
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/* Definitions of volume - partition conversion */
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#if FF_MULTI_PARTITION
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#define LD2PD(vol) VolToPart[vol].pd /* Get physical drive number */
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#define LD2PT(vol) VolToPart[vol].pt /* Get partition index */
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#else
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#define LD2PD(vol) (BYTE)(vol) /* Each logical drive is bound to the same physical drive number */
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#define LD2PT(vol) 0 /* Find first valid partition or in SFD */
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#endif
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/* Definitions of sector size */
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#if (FF_MAX_SS < FF_MIN_SS) || (FF_MAX_SS != 512 && FF_MAX_SS != 1024 && FF_MAX_SS != 2048 && FF_MAX_SS != 4096) || (FF_MIN_SS != 512 && FF_MIN_SS != 1024 && FF_MIN_SS != 2048 && FF_MIN_SS != 4096)
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#error Wrong sector size configuration
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#endif
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#if FF_MAX_SS == FF_MIN_SS
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#define SS(fs) ((UINT)FF_MAX_SS) /* Fixed sector size */
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#else
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#define SS(fs) ((fs)->ssize) /* Variable sector size */
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#endif
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/* Timestamp */
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#if FF_FS_NORTC == 1
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#if FF_NORTC_YEAR < 1980 || FF_NORTC_YEAR > 2107 || FF_NORTC_MON < 1 || FF_NORTC_MON > 12 || FF_NORTC_MDAY < 1 || FF_NORTC_MDAY > 31
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#error Invalid FF_FS_NORTC settings
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#endif
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#define GET_FATTIME() ((DWORD)(FF_NORTC_YEAR - 1980) << 25 | (DWORD)FF_NORTC_MON << 21 | (DWORD)FF_NORTC_MDAY << 16)
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#else
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#define GET_FATTIME() get_fattime()
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#endif
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/* File lock controls */
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#if FF_FS_LOCK != 0
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#if FF_FS_READONLY
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#error FF_FS_LOCK must be 0 at read-only configuration
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#endif
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typedef struct {
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FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
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DWORD clu; /* Object ID 2, containing directory (0:root) */
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DWORD ofs; /* Object ID 3, offset in the directory */
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WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
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} FILESEM;
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#endif
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/* SBCS up-case tables (\x80-\xFF) */
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#define TBL_CT437 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
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0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT720 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
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0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT737 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
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0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
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0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT771 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
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0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
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0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
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#define TBL_CT775 {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
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0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
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0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT850 {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
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0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
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0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
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0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT852 {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
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0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
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0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
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#define TBL_CT855 {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
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0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
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0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
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0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
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0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT857 {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
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0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
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0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT860 {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
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0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT861 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
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0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
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0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT862 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
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0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT863 {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
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0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
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0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT864 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
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0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT865 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
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0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT866 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
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0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
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0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
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0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#define TBL_CT869 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
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0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
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0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
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0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
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0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
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|
|
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/* DBCS code range |----- 1st byte -----| |----------- 2nd byte -----------| */
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#define TBL_DC932 {0x81, 0x9F, 0xE0, 0xFC, 0x40, 0x7E, 0x80, 0xFC, 0x00, 0x00}
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#define TBL_DC936 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0x80, 0xFE, 0x00, 0x00}
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#define TBL_DC949 {0x81, 0xFE, 0x00, 0x00, 0x41, 0x5A, 0x61, 0x7A, 0x81, 0xFE}
|
|
#define TBL_DC950 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0xA1, 0xFE, 0x00, 0x00}
|
|
|
|
|
|
/* Macros for table definitions */
|
|
#define MERGE_2STR(a, b) a ## b
|
|
#define MKCVTBL(hd, cp) MERGE_2STR(hd, cp)
|
|
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------------------
|
|
|
|
Module Private Work Area
|
|
|
|
---------------------------------------------------------------------------*/
|
|
/* Remark: Variables defined here without initial value shall be guaranteed
|
|
/ zero/null at start-up. If not, the linker option or start-up routine is
|
|
/ not compliance with C standard. */
|
|
|
|
/*--------------------------------*/
|
|
/* File/Volume controls */
|
|
/*--------------------------------*/
|
|
|
|
#if FF_VOLUMES < 1 || FF_VOLUMES > 10
|
|
#error Wrong FF_VOLUMES setting
|
|
#endif
|
|
static FATFS *FatFs[FF_VOLUMES]; /* Pointer to the filesystem objects (logical drives) */
|
|
static WORD Fsid; /* File system mount ID */
|
|
|
|
#if FF_FS_RPATH != 0 && FF_VOLUMES >= 2
|
|
static BYTE CurrVol; /* Current drive */
|
|
#endif
|
|
|
|
#if FF_FS_LOCK != 0
|
|
static FILESEM Files[FF_FS_LOCK]; /* Open object lock semaphores */
|
|
#endif
|
|
|
|
|
|
/*--------------------------------*/
|
|
/* LFN/Directory working buffer */
|
|
/*--------------------------------*/
|
|
|
|
#if FF_USE_LFN == 0 /* Non-LFN configuration */
|
|
#define DEF_NAMBUF
|
|
#define INIT_NAMBUF(fs)
|
|
#define FREE_NAMBUF()
|
|
|
|
#else /* LFN configurations */
|
|
#if FF_MAX_LFN < 12 || FF_MAX_LFN > 255
|
|
#error Wrong FF_MAX_LFN setting
|
|
#endif
|
|
static const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* FAT: Offset of LFN characters in the directory entry */
|
|
#define MAXDIRB(nc) ((nc + 44U) / 15 * SZDIRE) /* exFAT: Size of directory entry block scratchpad buffer needed for the max name length */
|
|
|
|
#if FF_USE_LFN == 1 /* LFN enabled with static working buffer */
|
|
#if FF_FS_EXFAT
|
|
static BYTE DirBuf[MAXDIRB(FF_MAX_LFN)]; /* Directory entry block scratchpad buffer */
|
|
#endif
|
|
static WCHAR LfnBuf[FF_MAX_LFN + 1]; /* LFN working buffer */
|
|
#define DEF_NAMBUF
|
|
#define INIT_NAMBUF(fs)
|
|
#define FREE_NAMBUF()
|
|
|
|
#elif FF_USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */
|
|
#if FF_FS_EXFAT
|
|
#define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; BYTE dbuf[MAXDIRB(FF_MAX_LFN)]; /* LFN working buffer and directory entry block scratchpad buffer */
|
|
#define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }
|
|
#define FREE_NAMBUF()
|
|
#else
|
|
#define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; /* LFN working buffer */
|
|
#define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; }
|
|
#define FREE_NAMBUF()
|
|
#endif
|
|
|
|
#elif FF_USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */
|
|
#if FF_FS_EXFAT
|
|
#define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer and directory entry block scratchpad buffer */
|
|
#define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2 + MAXDIRB(FF_MAX_LFN)); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+FF_MAX_LFN+1); }
|
|
#define FREE_NAMBUF() ff_memfree(lfn)
|
|
#else
|
|
#define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer */
|
|
#define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }
|
|
#define FREE_NAMBUF() ff_memfree(lfn)
|
|
#endif
|
|
|
|
#else
|
|
#error Wrong FF_USE_LFN setting
|
|
|
|
#endif
|
|
#endif
|
|
|
|
|
|
/*--------------------------------*/
|
|
/* Code conversion tables */
|
|
/*--------------------------------*/
|
|
|
|
#if FF_CODE_PAGE == 0 /* Run-time code page configuration */
|
|
#define CODEPAGE CodePage
|
|
static WORD CodePage; /* Current code page */
|
|
static const BYTE *ExCvt, *DbcTbl; /* Pointer to current SBCS up-case table and DBCS code range table below */
|
|
static const BYTE Ct437[] = TBL_CT437;
|
|
static const BYTE Ct720[] = TBL_CT720;
|
|
static const BYTE Ct737[] = TBL_CT737;
|
|
static const BYTE Ct771[] = TBL_CT771;
|
|
static const BYTE Ct775[] = TBL_CT775;
|
|
static const BYTE Ct850[] = TBL_CT850;
|
|
static const BYTE Ct852[] = TBL_CT852;
|
|
static const BYTE Ct855[] = TBL_CT855;
|
|
static const BYTE Ct857[] = TBL_CT857;
|
|
static const BYTE Ct860[] = TBL_CT860;
|
|
static const BYTE Ct861[] = TBL_CT861;
|
|
static const BYTE Ct862[] = TBL_CT862;
|
|
static const BYTE Ct863[] = TBL_CT863;
|
|
static const BYTE Ct864[] = TBL_CT864;
|
|
static const BYTE Ct865[] = TBL_CT865;
|
|
static const BYTE Ct866[] = TBL_CT866;
|
|
static const BYTE Ct869[] = TBL_CT869;
|
|
static const BYTE Dc932[] = TBL_DC932;
|
|
static const BYTE Dc936[] = TBL_DC936;
|
|
static const BYTE Dc949[] = TBL_DC949;
|
|
static const BYTE Dc950[] = TBL_DC950;
|
|
|
|
#elif FF_CODE_PAGE < 900 /* Static code page configuration (SBCS) */
|
|
#define CODEPAGE FF_CODE_PAGE
|
|
static const BYTE ExCvt[] = MKCVTBL(TBL_CT, FF_CODE_PAGE);
|
|
|
|
#else /* Static code page configuration (DBCS) */
|
|
#define CODEPAGE FF_CODE_PAGE
|
|
static const BYTE DbcTbl[] = MKCVTBL(TBL_DC, FF_CODE_PAGE);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------------------
|
|
|
|
Module Private Functions
|
|
|
|
---------------------------------------------------------------------------*/
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Load/Store multi-byte word in the FAT structure */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */
|
|
{
|
|
WORD rv;
|
|
|
|
rv = ptr[1];
|
|
rv = rv << 8 | ptr[0];
|
|
return rv;
|
|
}
|
|
|
|
static
|
|
DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */
|
|
{
|
|
DWORD rv;
|
|
|
|
rv = ptr[3];
|
|
rv = rv << 8 | ptr[2];
|
|
rv = rv << 8 | ptr[1];
|
|
rv = rv << 8 | ptr[0];
|
|
return rv;
|
|
}
|
|
|
|
#if FF_FS_EXFAT
|
|
static
|
|
QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */
|
|
{
|
|
QWORD rv;
|
|
|
|
rv = ptr[7];
|
|
rv = rv << 8 | ptr[6];
|
|
rv = rv << 8 | ptr[5];
|
|
rv = rv << 8 | ptr[4];
|
|
rv = rv << 8 | ptr[3];
|
|
rv = rv << 8 | ptr[2];
|
|
rv = rv << 8 | ptr[1];
|
|
rv = rv << 8 | ptr[0];
|
|
return rv;
|
|
}
|
|
#endif
|
|
|
|
#if !FF_FS_READONLY
|
|
static
|
|
void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */
|
|
{
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val;
|
|
}
|
|
|
|
static
|
|
void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */
|
|
{
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val;
|
|
}
|
|
|
|
#if FF_FS_EXFAT
|
|
static
|
|
void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */
|
|
{
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val; val >>= 8;
|
|
*ptr++ = (BYTE)val;
|
|
}
|
|
#endif
|
|
#endif /* !FF_FS_READONLY */
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* String functions */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
/* Copy memory to memory */
|
|
static
|
|
void mem_cpy (void* dst, const void* src, UINT cnt)
|
|
{
|
|
BYTE *d = (BYTE*)dst;
|
|
const BYTE *s = (const BYTE*)src;
|
|
|
|
if (cnt != 0) {
|
|
do {
|
|
*d++ = *s++;
|
|
} while (--cnt);
|
|
}
|
|
}
|
|
|
|
|
|
/* Fill memory block */
|
|
static
|
|
void mem_set (void* dst, int val, UINT cnt)
|
|
{
|
|
BYTE *d = (BYTE*)dst;
|
|
|
|
do {
|
|
*d++ = (BYTE)val;
|
|
} while (--cnt);
|
|
}
|
|
|
|
|
|
/* Compare memory block */
|
|
static
|
|
int mem_cmp (const void* dst, const void* src, UINT cnt) /* ZR:same, NZ:different */
|
|
{
|
|
const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
|
|
int r = 0;
|
|
|
|
do {
|
|
r = *d++ - *s++;
|
|
} while (--cnt && r == 0);
|
|
|
|
return r;
|
|
}
|
|
|
|
|
|
/* Check if chr is contained in the string */
|
|
static
|
|
int chk_chr (const char* str, int chr) /* NZ:contained, ZR:not contained */
|
|
{
|
|
while (*str && *str != chr) str++;
|
|
return *str;
|
|
}
|
|
|
|
|
|
/* Test if the character is DBC 1st byte */
|
|
static
|
|
int dbc_1st (BYTE c)
|
|
{
|
|
#if FF_CODE_PAGE == 0 /* Variable code page */
|
|
if (DbcTbl && c >= DbcTbl[0]) {
|
|
if (c <= DbcTbl[1]) return 1; /* 1st byte range 1 */
|
|
if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1; /* 1st byte range 2 */
|
|
}
|
|
#elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */
|
|
if (c >= DbcTbl[0]) {
|
|
if (c <= DbcTbl[1]) return 1;
|
|
if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1;
|
|
}
|
|
#else /* SBCS fixed code page */
|
|
if (c) return 0; /* Always false */
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Test if the character is DBC 2nd byte */
|
|
static
|
|
int dbc_2nd (BYTE c)
|
|
{
|
|
#if FF_CODE_PAGE == 0 /* Variable code page */
|
|
if (DbcTbl && c >= DbcTbl[4]) {
|
|
if (c <= DbcTbl[5]) return 1; /* 2nd byte range 1 */
|
|
if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1; /* 2nd byte range 2 */
|
|
if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1; /* 2nd byte range 3 */
|
|
}
|
|
#elif FF_CODE_PAGE >= 900 /* DBCD fixed code page */
|
|
if (c >= DbcTbl[4]) {
|
|
if (c <= DbcTbl[5]) return 1;
|
|
if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1;
|
|
if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1;
|
|
}
|
|
#else /* SBCS fixed code page */
|
|
if (c) return 0; /* Always false */
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
#if FF_FS_REENTRANT
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Request/Release grant to access the volume */
|
|
/*-----------------------------------------------------------------------*/
|
|
static
|
|
int lock_fs ( /* 1:Ok, 0:timeout */
|
|
FATFS* fs /* Filesystem object */
|
|
)
|
|
{
|
|
return ff_req_grant(fs->sobj);
|
|
}
|
|
|
|
|
|
static
|
|
void unlock_fs (
|
|
FATFS* fs, /* Filesystem object */
|
|
FRESULT res /* Result code to be returned */
|
|
)
|
|
{
|
|
if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) {
|
|
ff_rel_grant(fs->sobj);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#if FF_FS_LOCK != 0
|
|
/*-----------------------------------------------------------------------*/
|
|
/* File lock control functions */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT chk_lock ( /* Check if the file can be accessed */
|
|
DIR* dp, /* Directory object pointing the file to be checked */
|
|
int acc /* Desired access type (0:Read mode open, 1:Write mode open, 2:Delete or rename) */
|
|
)
|
|
{
|
|
UINT i, be;
|
|
|
|
/* Search open object table for the object */
|
|
be = 0;
|
|
for (i = 0; i < FF_FS_LOCK; i++) {
|
|
if (Files[i].fs) { /* Existing entry */
|
|
if (Files[i].fs == dp->obj.fs && /* Check if the object matches with an open object */
|
|
Files[i].clu == dp->obj.sclust &&
|
|
Files[i].ofs == dp->dptr) break;
|
|
} else { /* Blank entry */
|
|
be = 1;
|
|
}
|
|
}
|
|
if (i == FF_FS_LOCK) { /* The object has not been opened */
|
|
return (!be && acc != 2) ? FR_TOO_MANY_OPEN_FILES : FR_OK; /* Is there a blank entry for new object? */
|
|
}
|
|
|
|
/* The object was opened. Reject any open against writing file and all write mode open */
|
|
return (acc != 0 || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
|
|
}
|
|
|
|
|
|
static
|
|
int enq_lock (void) /* Check if an entry is available for a new object */
|
|
{
|
|
UINT i;
|
|
|
|
for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
|
|
return (i == FF_FS_LOCK) ? 0 : 1;
|
|
}
|
|
|
|
|
|
static
|
|
UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
|
|
DIR* dp, /* Directory object pointing the file to register or increment */
|
|
int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
|
|
)
|
|
{
|
|
UINT i;
|
|
|
|
|
|
for (i = 0; i < FF_FS_LOCK; i++) { /* Find the object */
|
|
if (Files[i].fs == dp->obj.fs &&
|
|
Files[i].clu == dp->obj.sclust &&
|
|
Files[i].ofs == dp->dptr) break;
|
|
}
|
|
|
|
if (i == FF_FS_LOCK) { /* Not opened. Register it as new. */
|
|
for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
|
|
if (i == FF_FS_LOCK) return 0; /* No free entry to register (int err) */
|
|
Files[i].fs = dp->obj.fs;
|
|
Files[i].clu = dp->obj.sclust;
|
|
Files[i].ofs = dp->dptr;
|
|
Files[i].ctr = 0;
|
|
}
|
|
|
|
if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
|
|
|
|
Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
|
|
|
|
return i + 1; /* Index number origin from 1 */
|
|
}
|
|
|
|
|
|
static
|
|
FRESULT dec_lock ( /* Decrement object open counter */
|
|
UINT i /* Semaphore index (1..) */
|
|
)
|
|
{
|
|
WORD n;
|
|
FRESULT res;
|
|
|
|
|
|
if (--i < FF_FS_LOCK) { /* Index number origin from 0 */
|
|
n = Files[i].ctr;
|
|
if (n == 0x100) n = 0; /* If write mode open, delete the entry */
|
|
if (n > 0) n--; /* Decrement read mode open count */
|
|
Files[i].ctr = n;
|
|
if (n == 0) Files[i].fs = 0; /* Delete the entry if open count gets zero */
|
|
res = FR_OK;
|
|
} else {
|
|
res = FR_INT_ERR; /* Invalid index nunber */
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
static
|
|
void clear_lock ( /* Clear lock entries of the volume */
|
|
FATFS *fs
|
|
)
|
|
{
|
|
UINT i;
|
|
|
|
for (i = 0; i < FF_FS_LOCK; i++) {
|
|
if (Files[i].fs == fs) Files[i].fs = 0;
|
|
}
|
|
}
|
|
|
|
#endif /* FF_FS_LOCK != 0 */
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Move/Flush disk access window in the filesystem object */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if !FF_FS_READONLY
|
|
static
|
|
FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERR */
|
|
FATFS* fs /* Filesystem object */
|
|
)
|
|
{
|
|
FRESULT res = FR_OK;
|
|
|
|
|
|
if (fs->wflag) { /* Is the disk access window dirty */
|
|
if (disk_write(fs->pdrv, fs->win, fs->winsect, 1) == RES_OK) { /* Write back the window */
|
|
fs->wflag = 0; /* Clear window dirty flag */
|
|
if (fs->winsect - fs->fatbase < fs->fsize) { /* Is it in the 1st FAT? */
|
|
if (fs->n_fats == 2) disk_write(fs->pdrv, fs->win, fs->winsect + fs->fsize, 1); /* Reflect it to 2nd FAT if needed */
|
|
}
|
|
} else {
|
|
res = FR_DISK_ERR;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
|
|
static
|
|
FRESULT move_window ( /* Returns FR_OK or FR_DISK_ERR */
|
|
FATFS* fs, /* Filesystem object */
|
|
DWORD sector /* Sector number to make appearance in the fs->win[] */
|
|
)
|
|
{
|
|
FRESULT res = FR_OK;
|
|
|
|
|
|
if (sector != fs->winsect) { /* Window offset changed? */
|
|
#if !FF_FS_READONLY
|
|
res = sync_window(fs); /* Write-back changes */
|
|
#endif
|
|
if (res == FR_OK) { /* Fill sector window with new data */
|
|
if (disk_read(fs->pdrv, fs->win, sector, 1) != RES_OK) {
|
|
sector = 0xFFFFFFFF; /* Invalidate window if read data is not valid */
|
|
res = FR_DISK_ERR;
|
|
}
|
|
fs->winsect = sector;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Synchronize filesystem and data on the storage */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT sync_fs ( /* Returns FR_OK or FR_DISK_ERR */
|
|
FATFS* fs /* Filesystem object */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
|
|
|
|
res = sync_window(fs);
|
|
if (res == FR_OK) {
|
|
if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { /* FAT32: Update FSInfo sector if needed */
|
|
/* Create FSInfo structure */
|
|
mem_set(fs->win, 0, SS(fs));
|
|
st_word(fs->win + BS_55AA, 0xAA55);
|
|
st_dword(fs->win + FSI_LeadSig, 0x41615252);
|
|
st_dword(fs->win + FSI_StrucSig, 0x61417272);
|
|
st_dword(fs->win + FSI_Free_Count, fs->free_clst);
|
|
st_dword(fs->win + FSI_Nxt_Free, fs->last_clst);
|
|
/* Write it into the FSInfo sector */
|
|
fs->winsect = fs->volbase + 1;
|
|
disk_write(fs->pdrv, fs->win, fs->winsect, 1);
|
|
fs->fsi_flag = 0;
|
|
}
|
|
/* Make sure that no pending write process in the lower layer */
|
|
if (disk_ioctl(fs->pdrv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get physical sector number from cluster number */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
DWORD clst2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
|
|
FATFS* fs, /* Filesystem object */
|
|
DWORD clst /* Cluster# to be converted */
|
|
)
|
|
{
|
|
clst -= 2; /* Cluster number is origin from 2 */
|
|
if (clst >= fs->n_fatent - 2) return 0; /* Is it invalid cluster number? */
|
|
return fs->database + fs->csize * clst; /* Start sector number of the cluster */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT access - Read value of a FAT entry */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */
|
|
FFOBJID* obj, /* Corresponding object */
|
|
DWORD clst /* Cluster number to get the value */
|
|
)
|
|
{
|
|
UINT wc, bc;
|
|
DWORD val;
|
|
FATFS *fs = obj->fs;
|
|
|
|
|
|
if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
|
|
val = 1; /* Internal error */
|
|
|
|
} else {
|
|
val = 0xFFFFFFFF; /* Default value falls on disk error */
|
|
|
|
switch (fs->fs_type) {
|
|
case FS_FAT12 :
|
|
bc = (UINT)clst; bc += bc / 2;
|
|
if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
|
|
wc = fs->win[bc++ % SS(fs)]; /* Get 1st byte of the entry */
|
|
if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
|
|
wc |= fs->win[bc % SS(fs)] << 8; /* Merge 2nd byte of the entry */
|
|
val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF); /* Adjust bit position */
|
|
break;
|
|
|
|
case FS_FAT16 :
|
|
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
|
|
val = ld_word(fs->win + clst * 2 % SS(fs)); /* Simple WORD array */
|
|
break;
|
|
|
|
case FS_FAT32 :
|
|
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
|
|
val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF; /* Simple DWORD array but mask out upper 4 bits */
|
|
break;
|
|
#if FF_FS_EXFAT
|
|
case FS_EXFAT :
|
|
if (obj->objsize != 0) {
|
|
DWORD cofs = clst - obj->sclust; /* Offset from start cluster */
|
|
DWORD clen = (DWORD)((obj->objsize - 1) / SS(fs)) / fs->csize; /* Number of clusters - 1 */
|
|
|
|
if (obj->stat == 2 && cofs <= clen) { /* Is it a contiguous chain? */
|
|
val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* No data on the FAT, generate the value */
|
|
break;
|
|
}
|
|
if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the 1st fragment? */
|
|
val = clst + 1; /* Generate the value */
|
|
break;
|
|
}
|
|
if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */
|
|
if (obj->n_frag != 0) { /* Is it on the growing edge? */
|
|
val = 0x7FFFFFFF; /* Generate EOC */
|
|
} else {
|
|
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
|
|
val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
/* go to default */
|
|
#endif
|
|
default:
|
|
val = 1; /* Internal error */
|
|
}
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT access - Change value of a FAT entry */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
|
|
FATFS* fs, /* Corresponding filesystem object */
|
|
DWORD clst, /* FAT index number (cluster number) to be changed */
|
|
DWORD val /* New value to be set to the entry */
|
|
)
|
|
{
|
|
UINT bc;
|
|
BYTE *p;
|
|
FRESULT res = FR_INT_ERR;
|
|
|
|
|
|
if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */
|
|
switch (fs->fs_type) {
|
|
case FS_FAT12 :
|
|
bc = (UINT)clst; bc += bc / 2; /* bc: byte offset of the entry */
|
|
res = move_window(fs, fs->fatbase + (bc / SS(fs)));
|
|
if (res != FR_OK) break;
|
|
p = fs->win + bc++ % SS(fs);
|
|
*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; /* Put 1st byte */
|
|
fs->wflag = 1;
|
|
res = move_window(fs, fs->fatbase + (bc / SS(fs)));
|
|
if (res != FR_OK) break;
|
|
p = fs->win + bc % SS(fs);
|
|
*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); /* Put 2nd byte */
|
|
fs->wflag = 1;
|
|
break;
|
|
|
|
case FS_FAT16 :
|
|
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
|
|
if (res != FR_OK) break;
|
|
st_word(fs->win + clst * 2 % SS(fs), (WORD)val); /* Simple WORD array */
|
|
fs->wflag = 1;
|
|
break;
|
|
|
|
case FS_FAT32 :
|
|
#if FF_FS_EXFAT
|
|
case FS_EXFAT :
|
|
#endif
|
|
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
|
|
if (res != FR_OK) break;
|
|
if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
|
|
val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000);
|
|
}
|
|
st_dword(fs->win + clst * 4 % SS(fs), val);
|
|
fs->wflag = 1;
|
|
break;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
#if FF_FS_EXFAT && !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* exFAT: Accessing FAT and Allocation Bitmap */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
/*--------------------------------------*/
|
|
/* Find a contiguous free cluster block */
|
|
/*--------------------------------------*/
|
|
|
|
static
|
|
DWORD find_bitmap ( /* 0:Not found, 2..:Cluster block found, 0xFFFFFFFF:Disk error */
|
|
FATFS* fs, /* Filesystem object */
|
|
DWORD clst, /* Cluster number to scan from */
|
|
DWORD ncl /* Number of contiguous clusters to find (1..) */
|
|
)
|
|
{
|
|
BYTE bm, bv;
|
|
UINT i;
|
|
DWORD val, scl, ctr;
|
|
|
|
|
|
clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */
|
|
if (clst >= fs->n_fatent - 2) clst = 0;
|
|
scl = val = clst; ctr = 0;
|
|
for (;;) {
|
|
if (move_window(fs, fs->database + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF; /* (assuming bitmap is located top of the cluster heap) */
|
|
i = val / 8 % SS(fs); bm = 1 << (val % 8);
|
|
do {
|
|
do {
|
|
bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */
|
|
if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */
|
|
val = 0; bm = 0; i = SS(fs);
|
|
}
|
|
if (!bv) { /* Is it a free cluster? */
|
|
if (++ctr == ncl) return scl + 2; /* Check if run length is sufficient for required */
|
|
} else {
|
|
scl = val; ctr = 0; /* Encountered a cluster in-use, restart to scan */
|
|
}
|
|
if (val == clst) return 0; /* All cluster scanned? */
|
|
} while (bm);
|
|
bm = 1;
|
|
} while (++i < SS(fs));
|
|
}
|
|
}
|
|
|
|
|
|
/*----------------------------------------*/
|
|
/* Set/Clear a block of allocation bitmap */
|
|
/*----------------------------------------*/
|
|
|
|
static
|
|
FRESULT change_bitmap (
|
|
FATFS* fs, /* Filesystem object */
|
|
DWORD clst, /* Cluster number to change from */
|
|
DWORD ncl, /* Number of clusters to be changed */
|
|
int bv /* bit value to be set (0 or 1) */
|
|
)
|
|
{
|
|
BYTE bm;
|
|
UINT i;
|
|
DWORD sect;
|
|
|
|
|
|
clst -= 2; /* The first bit corresponds to cluster #2 */
|
|
sect = fs->database + clst / 8 / SS(fs); /* Sector address (assuming bitmap is located top of the cluster heap) */
|
|
i = clst / 8 % SS(fs); /* Byte offset in the sector */
|
|
bm = 1 << (clst % 8); /* Bit mask in the byte */
|
|
for (;;) {
|
|
if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR;
|
|
do {
|
|
do {
|
|
if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */
|
|
fs->win[i] ^= bm; /* Flip the bit */
|
|
fs->wflag = 1;
|
|
if (--ncl == 0) return FR_OK; /* All bits processed? */
|
|
} while (bm <<= 1); /* Next bit */
|
|
bm = 1;
|
|
} while (++i < SS(fs)); /* Next byte */
|
|
i = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
/* Fill the first fragment of the FAT chain */
|
|
/*---------------------------------------------*/
|
|
|
|
static
|
|
FRESULT fill_first_frag (
|
|
FFOBJID* obj /* Pointer to the corresponding object */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DWORD cl, n;
|
|
|
|
|
|
if (obj->stat == 3) { /* Has the object been changed 'fragmented' in this session? */
|
|
for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */
|
|
res = put_fat(obj->fs, cl, cl + 1);
|
|
if (res != FR_OK) return res;
|
|
}
|
|
obj->stat = 0; /* Change status 'FAT chain is valid' */
|
|
}
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
/* Fill the last fragment of the FAT chain */
|
|
/*---------------------------------------------*/
|
|
|
|
static
|
|
FRESULT fill_last_frag (
|
|
FFOBJID* obj, /* Pointer to the corresponding object */
|
|
DWORD lcl, /* Last cluster of the fragment */
|
|
DWORD term /* Value to set the last FAT entry */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
|
|
|
|
while (obj->n_frag > 0) { /* Create the last chain on the FAT */
|
|
res = put_fat(obj->fs, lcl - obj->n_frag + 1, (obj->n_frag > 1) ? lcl - obj->n_frag + 2 : term);
|
|
if (res != FR_OK) return res;
|
|
obj->n_frag--;
|
|
}
|
|
return FR_OK;
|
|
}
|
|
|
|
#endif /* FF_FS_EXFAT && !FF_FS_READONLY */
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT handling - Remove a cluster chain */
|
|
/*-----------------------------------------------------------------------*/
|
|
static
|
|
FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
|
|
FFOBJID* obj, /* Corresponding object */
|
|
DWORD clst, /* Cluster to remove a chain from */
|
|
DWORD pclst /* Previous cluster of clst (0:entire chain) */
|
|
)
|
|
{
|
|
FRESULT res = FR_OK;
|
|
DWORD nxt;
|
|
FATFS *fs = obj->fs;
|
|
#if FF_FS_EXFAT || FF_USE_TRIM
|
|
DWORD scl = clst, ecl = clst;
|
|
#endif
|
|
#if FF_USE_TRIM
|
|
DWORD rt[2];
|
|
#endif
|
|
|
|
if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */
|
|
|
|
/* Mark the previous cluster 'EOC' on the FAT if it exists */
|
|
if (pclst != 0 && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) {
|
|
res = put_fat(fs, pclst, 0xFFFFFFFF);
|
|
if (res != FR_OK) return res;
|
|
}
|
|
|
|
/* Remove the chain */
|
|
do {
|
|
nxt = get_fat(obj, clst); /* Get cluster status */
|
|
if (nxt == 0) break; /* Empty cluster? */
|
|
if (nxt == 1) return FR_INT_ERR; /* Internal error? */
|
|
if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */
|
|
if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
|
|
res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */
|
|
if (res != FR_OK) return res;
|
|
}
|
|
if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */
|
|
fs->free_clst++;
|
|
fs->fsi_flag |= 1;
|
|
}
|
|
#if FF_FS_EXFAT || FF_USE_TRIM
|
|
if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
|
|
ecl = nxt;
|
|
} else { /* End of contiguous cluster block */
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */
|
|
if (res != FR_OK) return res;
|
|
}
|
|
#endif
|
|
#if FF_USE_TRIM
|
|
rt[0] = clst2sect(fs, scl); /* Start of data area freed */
|
|
rt[1] = clst2sect(fs, ecl) + fs->csize - 1; /* End of data area freed */
|
|
disk_ioctl(fs->pdrv, CTRL_TRIM, rt); /* Inform device the data in the block is no longer needed */
|
|
#endif
|
|
scl = ecl = nxt;
|
|
}
|
|
#endif
|
|
clst = nxt; /* Next cluster */
|
|
} while (clst < fs->n_fatent); /* Repeat while not the last link */
|
|
|
|
#if FF_FS_EXFAT
|
|
/* Some post processes for chain status */
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
if (pclst == 0) { /* Has the entire chain been removed? */
|
|
obj->stat = 0; /* Change the chain status 'initial' */
|
|
} else {
|
|
if (obj->stat == 0) { /* Is it a fragmented chain from the beginning of this session? */
|
|
clst = obj->sclust; /* Follow the chain to check if it gets contiguous */
|
|
while (clst != pclst) {
|
|
nxt = get_fat(obj, clst);
|
|
if (nxt < 2) return FR_INT_ERR;
|
|
if (nxt == 0xFFFFFFFF) return FR_DISK_ERR;
|
|
if (nxt != clst + 1) break; /* Not contiguous? */
|
|
clst++;
|
|
}
|
|
if (clst == pclst) { /* Has the chain got contiguous again? */
|
|
obj->stat = 2; /* Change the chain status 'contiguous' */
|
|
}
|
|
} else {
|
|
if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Was the chain fragmented in this session and got contiguous again? */
|
|
obj->stat = 2; /* Change the chain status 'contiguous' */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT handling - Stretch a chain or Create a new chain */
|
|
/*-----------------------------------------------------------------------*/
|
|
static
|
|
DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
|
|
FFOBJID* obj, /* Corresponding object */
|
|
DWORD clst /* Cluster# to stretch, 0:Create a new chain */
|
|
)
|
|
{
|
|
DWORD cs, ncl, scl;
|
|
FRESULT res;
|
|
FATFS *fs = obj->fs;
|
|
|
|
|
|
if (clst == 0) { /* Create a new chain */
|
|
scl = fs->last_clst; /* Suggested cluster to start to find */
|
|
if (scl == 0 || scl >= fs->n_fatent) scl = 1;
|
|
}
|
|
else { /* Stretch a chain */
|
|
cs = get_fat(obj, clst); /* Check the cluster status */
|
|
if (cs < 2) return 1; /* Test for insanity */
|
|
if (cs == 0xFFFFFFFF) return cs; /* Test for disk error */
|
|
if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
|
|
scl = clst; /* Cluster to start to find */
|
|
}
|
|
if (fs->free_clst == 0) return 0; /* No free cluster */
|
|
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
|
|
ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */
|
|
if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */
|
|
res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */
|
|
if (res == FR_INT_ERR) return 1;
|
|
if (res == FR_DISK_ERR) return 0xFFFFFFFF;
|
|
if (clst == 0) { /* Is it a new chain? */
|
|
obj->stat = 2; /* Set status 'contiguous' */
|
|
} else { /* It is a stretched chain */
|
|
if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */
|
|
obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */
|
|
obj->stat = 3; /* Change status 'just fragmented' */
|
|
}
|
|
}
|
|
if (obj->stat != 2) { /* Is the file non-contiguous? */
|
|
if (ncl == clst + 1) { /* Is the cluster next to previous one? */
|
|
obj->n_frag = obj->n_frag ? obj->n_frag + 1 : 2; /* Increment size of last framgent */
|
|
} else { /* New fragment */
|
|
if (obj->n_frag == 0) obj->n_frag = 1;
|
|
res = fill_last_frag(obj, clst, ncl); /* Fill last fragment on the FAT and link it to new one */
|
|
if (res == FR_OK) obj->n_frag = 1;
|
|
}
|
|
}
|
|
} else
|
|
#endif
|
|
{ /* On the FAT/FAT32 volume */
|
|
ncl = 0;
|
|
if (scl == clst) { /* Stretching an existing chain? */
|
|
ncl = scl + 1; /* Test if next cluster is free */
|
|
if (ncl >= fs->n_fatent) ncl = 2;
|
|
cs = get_fat(obj, ncl); /* Get next cluster status */
|
|
if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
|
|
if (cs != 0) { /* Not free? */
|
|
cs = fs->last_clst; /* Start at suggested cluster if it is valid */
|
|
if (cs >= 2 && cs < fs->n_fatent) scl = cs;
|
|
ncl = 0;
|
|
}
|
|
}
|
|
if (ncl == 0) { /* The new cluster cannot be contiguous and find another fragment */
|
|
ncl = scl; /* Start cluster */
|
|
for (;;) {
|
|
ncl++; /* Next cluster */
|
|
if (ncl >= fs->n_fatent) { /* Check wrap-around */
|
|
ncl = 2;
|
|
if (ncl > scl) return 0; /* No free cluster found? */
|
|
}
|
|
cs = get_fat(obj, ncl); /* Get the cluster status */
|
|
if (cs == 0) break; /* Found a free cluster? */
|
|
if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
|
|
if (ncl == scl) return 0; /* No free cluster found? */
|
|
}
|
|
}
|
|
res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */
|
|
if (res == FR_OK && clst != 0) {
|
|
res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */
|
|
}
|
|
}
|
|
|
|
if (res == FR_OK) { /* Update FSINFO if function succeeded. */
|
|
fs->last_clst = ncl;
|
|
if (fs->free_clst <= fs->n_fatent - 2) fs->free_clst--;
|
|
fs->fsi_flag |= 1;
|
|
} else {
|
|
ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Generate error status */
|
|
}
|
|
|
|
return ncl; /* Return new cluster number or error status */
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
#if FF_USE_FASTSEEK
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT handling - Convert offset into cluster with link map table */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
|
|
FIL* fp, /* Pointer to the file object */
|
|
FSIZE_t ofs /* File offset to be converted to cluster# */
|
|
)
|
|
{
|
|
DWORD cl, ncl, *tbl;
|
|
FATFS *fs = fp->obj.fs;
|
|
|
|
|
|
tbl = fp->cltbl + 1; /* Top of CLMT */
|
|
cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */
|
|
for (;;) {
|
|
ncl = *tbl++; /* Number of cluters in the fragment */
|
|
if (ncl == 0) return 0; /* End of table? (error) */
|
|
if (cl < ncl) break; /* In this fragment? */
|
|
cl -= ncl; tbl++; /* Next fragment */
|
|
}
|
|
return cl + *tbl; /* Return the cluster number */
|
|
}
|
|
|
|
#endif /* FF_USE_FASTSEEK */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Fill a cluster with zeros */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
#if !FF_FS_READONLY
|
|
static
|
|
FRESULT dir_clear ( /* Returns FR_OK or FR_DISK_ERR */
|
|
FATFS *fs, /* Filesystem object */
|
|
DWORD clst /* Directory table to clear */
|
|
)
|
|
{
|
|
DWORD sect;
|
|
UINT n, szb;
|
|
BYTE *ibuf;
|
|
|
|
|
|
if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */
|
|
sect = clst2sect(fs, clst); /* Top of the cluster */
|
|
fs->winsect = sect; /* Set window to top of the cluster */
|
|
mem_set(fs->win, 0, SS(fs)); /* Clear window buffer */
|
|
#if FF_USE_LFN == 3 /* Quick table clear by using multi-secter write */
|
|
/* Allocate a temporary buffer (32 KB max) */
|
|
for (szb = ((DWORD)fs->csize * SS(fs) >= 0x8000) ? 0x8000 : fs->csize * SS(fs); szb > SS(fs) && !(ibuf = ff_memalloc(szb)); szb /= 2) ;
|
|
if (szb > SS(fs)) { /* Buffer allocated? */
|
|
mem_set(ibuf, 0, szb);
|
|
szb /= SS(fs); /* Bytes -> Sectors */
|
|
for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
|
|
ff_memfree(ibuf);
|
|
} else
|
|
#endif
|
|
{
|
|
ibuf = fs->win; szb = 1; /* Use window buffer (single-sector writes may take a time) */
|
|
for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
|
|
}
|
|
return (n == fs->csize) ? FR_OK : FR_DISK_ERR;
|
|
}
|
|
#endif /* !FF_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Set directory index */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
|
|
DIR* dp, /* Pointer to directory object */
|
|
DWORD ofs /* Offset of directory table */
|
|
)
|
|
{
|
|
DWORD csz, clst;
|
|
FATFS *fs = dp->obj.fs;
|
|
|
|
|
|
if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */
|
|
return FR_INT_ERR;
|
|
}
|
|
dp->dptr = ofs; /* Set current offset */
|
|
clst = dp->obj.sclust; /* Table start cluster (0:root) */
|
|
if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */
|
|
clst = fs->dirbase;
|
|
if (FF_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */
|
|
}
|
|
|
|
if (clst == 0) { /* Static table (root-directory on the FAT volume) */
|
|
if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */
|
|
dp->sect = fs->dirbase;
|
|
|
|
} else { /* Dynamic table (sub-directory or root-directory on the FAT32/exFAT volume) */
|
|
csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */
|
|
while (ofs >= csz) { /* Follow cluster chain */
|
|
clst = get_fat(&dp->obj, clst); /* Get next cluster */
|
|
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
|
|
if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */
|
|
ofs -= csz;
|
|
}
|
|
dp->sect = clst2sect(fs, clst);
|
|
}
|
|
dp->clust = clst; /* Current cluster# */
|
|
if (dp->sect == 0) return FR_INT_ERR;
|
|
dp->sect += ofs / SS(fs); /* Sector# of the directory entry */
|
|
dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Move directory table index next */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
|
|
DIR* dp, /* Pointer to the directory object */
|
|
int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
|
|
)
|
|
{
|
|
DWORD ofs, clst;
|
|
FATFS *fs = dp->obj.fs;
|
|
|
|
|
|
ofs = dp->dptr + SZDIRE; /* Next entry */
|
|
if (dp->sect == 0 || ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) return FR_NO_FILE; /* Report EOT when offset has reached max value */
|
|
|
|
if (ofs % SS(fs) == 0) { /* Sector changed? */
|
|
dp->sect++; /* Next sector */
|
|
|
|
if (dp->clust == 0) { /* Static table */
|
|
if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */
|
|
dp->sect = 0; return FR_NO_FILE;
|
|
}
|
|
}
|
|
else { /* Dynamic table */
|
|
if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */
|
|
clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */
|
|
if (clst <= 1) return FR_INT_ERR; /* Internal error */
|
|
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
|
|
if (clst >= fs->n_fatent) { /* It reached end of dynamic table */
|
|
#if !FF_FS_READONLY
|
|
if (!stretch) { /* If no stretch, report EOT */
|
|
dp->sect = 0; return FR_NO_FILE;
|
|
}
|
|
clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */
|
|
if (clst == 0) return FR_DENIED; /* No free cluster */
|
|
if (clst == 1) return FR_INT_ERR; /* Internal error */
|
|
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
|
|
if (dir_clear(fs, clst) != FR_OK) return FR_DISK_ERR; /* Clean up the stretched table */
|
|
if (FF_FS_EXFAT) dp->obj.stat |= 4; /* exFAT: The directory has been stretched */
|
|
#else
|
|
if (!stretch) dp->sect = 0; /* (this line is to suppress compiler warning) */
|
|
dp->sect = 0; return FR_NO_FILE; /* Report EOT */
|
|
#endif
|
|
}
|
|
dp->clust = clst; /* Initialize data for new cluster */
|
|
dp->sect = clst2sect(fs, clst);
|
|
}
|
|
}
|
|
}
|
|
dp->dptr = ofs; /* Current entry */
|
|
dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Reserve a block of directory entries */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
|
|
DIR* dp, /* Pointer to the directory object */
|
|
UINT nent /* Number of contiguous entries to allocate */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
UINT n;
|
|
FATFS *fs = dp->obj.fs;
|
|
|
|
|
|
res = dir_sdi(dp, 0);
|
|
if (res == FR_OK) {
|
|
n = 0;
|
|
do {
|
|
res = move_window(fs, dp->sect);
|
|
if (res != FR_OK) break;
|
|
#if FF_FS_EXFAT
|
|
if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) {
|
|
#else
|
|
if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) {
|
|
#endif
|
|
if (++n == nent) break; /* A block of contiguous free entries is found */
|
|
} else {
|
|
n = 0; /* Not a blank entry. Restart to search */
|
|
}
|
|
res = dir_next(dp, 1);
|
|
} while (res == FR_OK); /* Next entry with table stretch enabled */
|
|
}
|
|
|
|
if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
|
|
return res;
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT: Directory handling - Load/Store start cluster number */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
|
|
FATFS* fs, /* Pointer to the fs object */
|
|
const BYTE* dir /* Pointer to the key entry */
|
|
)
|
|
{
|
|
DWORD cl;
|
|
|
|
cl = ld_word(dir + DIR_FstClusLO);
|
|
if (fs->fs_type == FS_FAT32) {
|
|
cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16;
|
|
}
|
|
|
|
return cl;
|
|
}
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
static
|
|
void st_clust (
|
|
FATFS* fs, /* Pointer to the fs object */
|
|
BYTE* dir, /* Pointer to the key entry */
|
|
DWORD cl /* Value to be set */
|
|
)
|
|
{
|
|
st_word(dir + DIR_FstClusLO, (WORD)cl);
|
|
if (fs->fs_type == FS_FAT32) {
|
|
st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16));
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
#if FF_USE_LFN
|
|
/*--------------------------------------------------------*/
|
|
/* FAT-LFN: Compare a part of file name with an LFN entry */
|
|
/*--------------------------------------------------------*/
|
|
static
|
|
int cmp_lfn ( /* 1:matched, 0:not matched */
|
|
const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
|
|
BYTE* dir /* Pointer to the directory entry containing the part of LFN */
|
|
)
|
|
{
|
|
UINT i, s;
|
|
WCHAR wc, uc;
|
|
|
|
|
|
if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
|
|
|
|
i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
|
|
|
|
for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
|
|
uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
|
|
if (wc) {
|
|
if (i >= FF_MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */
|
|
return 0; /* Not matched */
|
|
}
|
|
wc = uc;
|
|
} else {
|
|
if (uc != 0xFFFF) return 0; /* Check filler */
|
|
}
|
|
}
|
|
|
|
if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */
|
|
|
|
return 1; /* The part of LFN matched */
|
|
}
|
|
|
|
|
|
#if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
|
|
/*-----------------------------------------------------*/
|
|
/* FAT-LFN: Pick a part of file name from an LFN entry */
|
|
/*-----------------------------------------------------*/
|
|
static
|
|
int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
|
|
WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
|
|
BYTE* dir /* Pointer to the LFN entry */
|
|
)
|
|
{
|
|
UINT i, s;
|
|
WCHAR wc, uc;
|
|
|
|
|
|
if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO is 0 */
|
|
|
|
i = ((dir[LDIR_Ord] & ~LLEF) - 1) * 13; /* Offset in the LFN buffer */
|
|
|
|
for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
|
|
uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
|
|
if (wc) {
|
|
if (i >= FF_MAX_LFN) return 0; /* Buffer overflow? */
|
|
lfnbuf[i++] = wc = uc; /* Store it */
|
|
} else {
|
|
if (uc != 0xFFFF) return 0; /* Check filler */
|
|
}
|
|
}
|
|
|
|
if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */
|
|
if (i >= FF_MAX_LFN) return 0; /* Buffer overflow? */
|
|
lfnbuf[i] = 0;
|
|
}
|
|
|
|
return 1; /* The part of LFN is valid */
|
|
}
|
|
#endif
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*-----------------------------------------*/
|
|
/* FAT-LFN: Create an entry of LFN entries */
|
|
/*-----------------------------------------*/
|
|
static
|
|
void put_lfn (
|
|
const WCHAR* lfn, /* Pointer to the LFN */
|
|
BYTE* dir, /* Pointer to the LFN entry to be created */
|
|
BYTE ord, /* LFN order (1-20) */
|
|
BYTE sum /* Checksum of the corresponding SFN */
|
|
)
|
|
{
|
|
UINT i, s;
|
|
WCHAR wc;
|
|
|
|
|
|
dir[LDIR_Chksum] = sum; /* Set checksum */
|
|
dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
|
|
dir[LDIR_Type] = 0;
|
|
st_word(dir + LDIR_FstClusLO, 0);
|
|
|
|
i = (ord - 1) * 13; /* Get offset in the LFN working buffer */
|
|
s = wc = 0;
|
|
do {
|
|
if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */
|
|
st_word(dir + LfnOfs[s], wc); /* Put it */
|
|
if (wc == 0) wc = 0xFFFF; /* Padding characters for left locations */
|
|
} while (++s < 13);
|
|
if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */
|
|
dir[LDIR_Ord] = ord; /* Set the LFN order */
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
#endif /* FF_USE_LFN */
|
|
|
|
|
|
|
|
#if FF_USE_LFN && !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT-LFN: Create a Numbered SFN */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
void gen_numname (
|
|
BYTE* dst, /* Pointer to the buffer to store numbered SFN */
|
|
const BYTE* src, /* Pointer to SFN */
|
|
const WCHAR* lfn, /* Pointer to LFN */
|
|
UINT seq /* Sequence number */
|
|
)
|
|
{
|
|
BYTE ns[8], c;
|
|
UINT i, j;
|
|
WCHAR wc;
|
|
DWORD sr;
|
|
|
|
|
|
mem_cpy(dst, src, 11);
|
|
|
|
if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */
|
|
sr = seq;
|
|
while (*lfn) { /* Create a CRC */
|
|
wc = *lfn++;
|
|
for (i = 0; i < 16; i++) {
|
|
sr = (sr << 1) + (wc & 1);
|
|
wc >>= 1;
|
|
if (sr & 0x10000) sr ^= 0x11021;
|
|
}
|
|
}
|
|
seq = (UINT)sr;
|
|
}
|
|
|
|
/* itoa (hexdecimal) */
|
|
i = 7;
|
|
do {
|
|
c = (BYTE)((seq % 16) + '0');
|
|
if (c > '9') c += 7;
|
|
ns[i--] = c;
|
|
seq /= 16;
|
|
} while (seq);
|
|
ns[i] = '~';
|
|
|
|
/* Append the number to the SFN body */
|
|
for (j = 0; j < i && dst[j] != ' '; j++) {
|
|
if (dbc_1st(dst[j])) {
|
|
if (j == i - 1) break;
|
|
j++;
|
|
}
|
|
}
|
|
do {
|
|
dst[j++] = (i < 8) ? ns[i++] : ' ';
|
|
} while (j < 8);
|
|
}
|
|
#endif /* FF_USE_LFN && !FF_FS_READONLY */
|
|
|
|
|
|
|
|
#if FF_USE_LFN
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT-LFN: Calculate checksum of an SFN entry */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
BYTE sum_sfn (
|
|
const BYTE* dir /* Pointer to the SFN entry */
|
|
)
|
|
{
|
|
BYTE sum = 0;
|
|
UINT n = 11;
|
|
|
|
do {
|
|
sum = (sum >> 1) + (sum << 7) + *dir++;
|
|
} while (--n);
|
|
return sum;
|
|
}
|
|
|
|
#endif /* FF_USE_LFN */
|
|
|
|
|
|
|
|
#if FF_FS_EXFAT
|
|
/*-----------------------------------------------------------------------*/
|
|
/* exFAT: Checksum */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
WORD xdir_sum ( /* Get checksum of the directoly entry block */
|
|
const BYTE* dir /* Directory entry block to be calculated */
|
|
)
|
|
{
|
|
UINT i, szblk;
|
|
WORD sum;
|
|
|
|
|
|
szblk = (dir[XDIR_NumSec] + 1) * SZDIRE;
|
|
for (i = sum = 0; i < szblk; i++) {
|
|
if (i == XDIR_SetSum) { /* Skip sum field */
|
|
i++;
|
|
} else {
|
|
sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i];
|
|
}
|
|
}
|
|
return sum;
|
|
}
|
|
|
|
|
|
|
|
static
|
|
WORD xname_sum ( /* Get check sum (to be used as hash) of the name */
|
|
const WCHAR* name /* File name to be calculated */
|
|
)
|
|
{
|
|
WCHAR chr;
|
|
WORD sum = 0;
|
|
|
|
|
|
while ((chr = *name++) != 0) {
|
|
chr = ff_wtoupper(chr); /* File name needs to be upper-case converted */
|
|
sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF);
|
|
sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8);
|
|
}
|
|
return sum;
|
|
}
|
|
|
|
|
|
#if !FF_FS_READONLY && FF_USE_MKFS
|
|
static
|
|
DWORD xsum32 (
|
|
BYTE dat, /* Byte to be calculated */
|
|
DWORD sum /* Previous sum */
|
|
)
|
|
{
|
|
sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat;
|
|
return sum;
|
|
}
|
|
#endif
|
|
|
|
|
|
#if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2
|
|
/*------------------------------------------------------*/
|
|
/* exFAT: Get object information from a directory block */
|
|
/*------------------------------------------------------*/
|
|
|
|
static
|
|
void get_xdir_info (
|
|
BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */
|
|
FILINFO* fno /* Buffer to store the extracted file information */
|
|
)
|
|
{
|
|
WCHAR w;
|
|
UINT di, si, nc;
|
|
|
|
/* Get file name */
|
|
for (si = SZDIRE * 2, nc = di = 0; nc < dirb[XDIR_NumName]; si += 2, nc++) {
|
|
if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */
|
|
w = ld_word(dirb + si); /* Get a character */
|
|
#if !FF_LFN_UNICODE /* ANSI/OEM API */
|
|
w = ff_uni2oem(w, CODEPAGE); /* Convert it to OEM code */
|
|
if (w >= 0x100) { /* Is it a double byte char? */
|
|
fno->fname[di++] = (char)(w >> 8); /* Store 1st byte of the DBC */
|
|
}
|
|
#endif
|
|
if (w == 0 || di >= FF_MAX_LFN) { di = 0; break; } /* Invalid char or buffer overflow --> inaccessible object name */
|
|
fno->fname[di++] = (TCHAR)w; /* Store the character */
|
|
}
|
|
if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object name? */
|
|
fno->fname[di] = 0; /* Terminate file name */
|
|
|
|
fno->altname[0] = 0; /* No SFN */
|
|
fno->fattrib = dirb[XDIR_Attr]; /* Attribute */
|
|
fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */
|
|
fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */
|
|
fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */
|
|
}
|
|
|
|
#endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */
|
|
|
|
|
|
/*-----------------------------------*/
|
|
/* exFAT: Get a directry entry block */
|
|
/*-----------------------------------*/
|
|
|
|
static
|
|
FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */
|
|
DIR* dp /* Reading direcotry object pointing top of the entry block to load */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
UINT i, sz_ent;
|
|
BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */
|
|
|
|
|
|
/* Load 85 entry */
|
|
res = move_window(dp->obj.fs, dp->sect);
|
|
if (res != FR_OK) return res;
|
|
if (dp->dir[XDIR_Type] != 0x85) return FR_INT_ERR; /* Invalid order */
|
|
mem_cpy(dirb + 0 * SZDIRE, dp->dir, SZDIRE);
|
|
sz_ent = (dirb[XDIR_NumSec] + 1) * SZDIRE;
|
|
if (sz_ent < 3 * SZDIRE || sz_ent > 19 * SZDIRE) return FR_INT_ERR;
|
|
|
|
/* Load C0 entry */
|
|
res = dir_next(dp, 0);
|
|
if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
|
|
if (res != FR_OK) return res;
|
|
res = move_window(dp->obj.fs, dp->sect);
|
|
if (res != FR_OK) return res;
|
|
if (dp->dir[XDIR_Type] != 0xC0) return FR_INT_ERR; /* Invalid order */
|
|
mem_cpy(dirb + 1 * SZDIRE, dp->dir, SZDIRE);
|
|
if (MAXDIRB(dirb[XDIR_NumName]) > sz_ent) return FR_INT_ERR;
|
|
|
|
/* Load C1 entries */
|
|
i = 2 * SZDIRE; /* C1 offset to load */
|
|
do {
|
|
res = dir_next(dp, 0);
|
|
if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
|
|
if (res != FR_OK) return res;
|
|
res = move_window(dp->obj.fs, dp->sect);
|
|
if (res != FR_OK) return res;
|
|
if (dp->dir[XDIR_Type] != 0xC1) return FR_INT_ERR; /* Invalid order */
|
|
if (i < MAXDIRB(FF_MAX_LFN)) mem_cpy(dirb + i, dp->dir, SZDIRE);
|
|
} while ((i += SZDIRE) < sz_ent);
|
|
|
|
/* Sanity check (do it for only accessible object) */
|
|
if (i <= MAXDIRB(FF_MAX_LFN)) {
|
|
if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR;
|
|
}
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
#if !FF_FS_READONLY || FF_FS_RPATH != 0
|
|
/*------------------------------------------------*/
|
|
/* exFAT: Load the object's directory entry block */
|
|
/*------------------------------------------------*/
|
|
static
|
|
FRESULT load_obj_xdir (
|
|
DIR* dp, /* Blank directory object to be used to access containing direcotry */
|
|
const FFOBJID* obj /* Object with its containing directory information */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
|
|
/* Open object containing directory */
|
|
dp->obj.fs = obj->fs;
|
|
dp->obj.sclust = obj->c_scl;
|
|
dp->obj.stat = (BYTE)obj->c_size;
|
|
dp->obj.objsize = obj->c_size & 0xFFFFFF00;
|
|
dp->obj.n_frag = 0;
|
|
dp->blk_ofs = obj->c_ofs;
|
|
|
|
res = dir_sdi(dp, dp->blk_ofs); /* Goto object's entry block */
|
|
if (res == FR_OK) {
|
|
res = load_xdir(dp); /* Load the object's entry block */
|
|
}
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*----------------------------------------*/
|
|
/* exFAT: Store the directory entry block */
|
|
/*----------------------------------------*/
|
|
static
|
|
FRESULT store_xdir (
|
|
DIR* dp /* Pointer to the direcotry object */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
UINT nent;
|
|
BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */
|
|
|
|
/* Create set sum */
|
|
st_word(dirb + XDIR_SetSum, xdir_sum(dirb));
|
|
nent = dirb[XDIR_NumSec] + 1;
|
|
|
|
/* Store the direcotry entry block to the directory */
|
|
res = dir_sdi(dp, dp->blk_ofs);
|
|
while (res == FR_OK) {
|
|
res = move_window(dp->obj.fs, dp->sect);
|
|
if (res != FR_OK) break;
|
|
mem_cpy(dp->dir, dirb, SZDIRE);
|
|
dp->obj.fs->wflag = 1;
|
|
if (--nent == 0) break;
|
|
dirb += SZDIRE;
|
|
res = dir_next(dp, 0);
|
|
}
|
|
return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR;
|
|
}
|
|
|
|
|
|
|
|
/*-------------------------------------------*/
|
|
/* exFAT: Create a new directory enrty block */
|
|
/*-------------------------------------------*/
|
|
|
|
static
|
|
void create_xdir (
|
|
BYTE* dirb, /* Pointer to the direcotry entry block buffer */
|
|
const WCHAR* lfn /* Pointer to the object name */
|
|
)
|
|
{
|
|
UINT i;
|
|
BYTE nc1, nlen;
|
|
WCHAR chr;
|
|
|
|
|
|
/* Create 85+C0 entry */
|
|
mem_set(dirb, 0, 2 * SZDIRE);
|
|
dirb[0 * SZDIRE + XDIR_Type] = 0x85;
|
|
dirb[1 * SZDIRE + XDIR_Type] = 0xC0;
|
|
|
|
/* Create C1 entries */
|
|
nlen = nc1 = 0; chr = 1; i = SZDIRE * 2;
|
|
do {
|
|
dirb[i++] = 0xC1; dirb[i++] = 0; /* Entry type C1 */
|
|
do { /* Fill name field */
|
|
if (chr && (chr = lfn[nlen]) != 0) nlen++; /* Get a character if exist */
|
|
st_word(dirb + i, chr); /* Store it */
|
|
i += 2;
|
|
} while (i % SZDIRE != 0);
|
|
nc1++;
|
|
} while (lfn[nlen]); /* Fill next entry if any char follows */
|
|
|
|
dirb[XDIR_NumName] = nlen; /* Set name length */
|
|
dirb[XDIR_NumSec] = 1 + nc1; /* Set secondary count */
|
|
st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
#endif /* FF_FS_EXFAT */
|
|
|
|
|
|
|
|
#if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Read an object from the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_read (
|
|
DIR* dp, /* Pointer to the directory object */
|
|
int vol /* Filtered by 0:file/directory or 1:volume label */
|
|
)
|
|
{
|
|
FRESULT res = FR_NO_FILE;
|
|
FATFS *fs = dp->obj.fs;
|
|
BYTE a, c;
|
|
#if FF_USE_LFN
|
|
BYTE ord = 0xFF, sum = 0xFF;
|
|
#endif
|
|
|
|
while (dp->sect) {
|
|
res = move_window(fs, dp->sect);
|
|
if (res != FR_OK) break;
|
|
c = dp->dir[DIR_Name]; /* Test for the entry type */
|
|
if (c == 0) {
|
|
res = FR_NO_FILE; break; /* Reached to end of the directory */
|
|
}
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
|
|
if (FF_USE_LABEL && vol) {
|
|
if (c == 0x83) break; /* Volume label entry? */
|
|
} else {
|
|
if (c == 0x85) { /* Start of the file entry block? */
|
|
dp->blk_ofs = dp->dptr; /* Get location of the block */
|
|
res = load_xdir(dp); /* Load the entry block */
|
|
if (res == FR_OK) {
|
|
dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
} else
|
|
#endif
|
|
{ /* On the FAT/FAT32 volume */
|
|
dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */
|
|
#if FF_USE_LFN /* LFN configuration */
|
|
if (c == DDEM || c == '.' || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
|
|
ord = 0xFF;
|
|
} else {
|
|
if (a == AM_LFN) { /* An LFN entry is found */
|
|
if (c & LLEF) { /* Is it start of an LFN sequence? */
|
|
sum = dp->dir[LDIR_Chksum];
|
|
c &= (BYTE)~LLEF; ord = c;
|
|
dp->blk_ofs = dp->dptr;
|
|
}
|
|
/* Check LFN validity and capture it */
|
|
ord = (c == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
|
|
} else { /* An SFN entry is found */
|
|
if (ord || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */
|
|
dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
#else /* Non LFN configuration */
|
|
if (c != DDEM && c != '.' && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
res = dir_next(dp, 0); /* Next entry */
|
|
if (res != FR_OK) break;
|
|
}
|
|
|
|
if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */
|
|
return res;
|
|
}
|
|
|
|
#endif /* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Find an object in the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
|
|
DIR* dp /* Pointer to the directory object with the file name */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs = dp->obj.fs;
|
|
BYTE c;
|
|
#if FF_USE_LFN
|
|
BYTE a, ord, sum;
|
|
#endif
|
|
|
|
res = dir_sdi(dp, 0); /* Rewind directory object */
|
|
if (res != FR_OK) return res;
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
|
|
BYTE nc;
|
|
UINT di, ni;
|
|
WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */
|
|
|
|
while ((res = dir_read(dp, 0)) == FR_OK) { /* Read an item */
|
|
#if FF_MAX_LFN < 255
|
|
if (fs->dirbuf[XDIR_NumName] > FF_MAX_LFN) continue; /* Skip comparison if inaccessible object name */
|
|
#endif
|
|
if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip comparison if hash mismatched */
|
|
for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */
|
|
if ((di % SZDIRE) == 0) di += 2;
|
|
if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break;
|
|
}
|
|
if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */
|
|
}
|
|
return res;
|
|
}
|
|
#endif
|
|
/* On the FAT/FAT32 volume */
|
|
#if FF_USE_LFN
|
|
ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
|
|
#endif
|
|
do {
|
|
res = move_window(fs, dp->sect);
|
|
if (res != FR_OK) break;
|
|
c = dp->dir[DIR_Name];
|
|
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
|
|
#if FF_USE_LFN /* LFN configuration */
|
|
dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;
|
|
if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
|
|
ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
|
|
} else {
|
|
if (a == AM_LFN) { /* An LFN entry is found */
|
|
if (!(dp->fn[NSFLAG] & NS_NOLFN)) {
|
|
if (c & LLEF) { /* Is it start of LFN sequence? */
|
|
sum = dp->dir[LDIR_Chksum];
|
|
c &= (BYTE)~LLEF; ord = c; /* LFN start order */
|
|
dp->blk_ofs = dp->dptr; /* Start offset of LFN */
|
|
}
|
|
/* Check validity of the LFN entry and compare it with given name */
|
|
ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
|
|
}
|
|
} else { /* An SFN entry is found */
|
|
if (!ord && sum == sum_sfn(dp->dir)) break; /* LFN matched? */
|
|
if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */
|
|
ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
|
|
}
|
|
}
|
|
#else /* Non LFN configuration */
|
|
dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK;
|
|
if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */
|
|
#endif
|
|
res = dir_next(dp, 0); /* Next entry */
|
|
} while (res == FR_OK);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Register an object to the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
|
|
DIR* dp /* Target directory with object name to be created */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs = dp->obj.fs;
|
|
#if FF_USE_LFN /* LFN configuration */
|
|
UINT n, nlen, nent;
|
|
BYTE sn[12], sum;
|
|
|
|
|
|
if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */
|
|
for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */
|
|
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
|
|
nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */
|
|
res = dir_alloc(dp, nent); /* Allocate entries */
|
|
if (res != FR_OK) return res;
|
|
dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set the allocated entry block offset */
|
|
|
|
if (dp->obj.stat & 4) { /* Has the directory been stretched? */
|
|
dp->obj.stat &= ~4;
|
|
res = fill_first_frag(&dp->obj); /* Fill the first fragment on the FAT if needed */
|
|
if (res != FR_OK) return res;
|
|
res = fill_last_frag(&dp->obj, dp->clust, 0xFFFFFFFF); /* Fill the last fragment on the FAT if needed */
|
|
if (res != FR_OK) return res;
|
|
if (dp->obj.sclust != 0) { /* Is it a sub directory? */
|
|
DIR dj;
|
|
|
|
res = load_obj_xdir(&dj, &dp->obj); /* Load the object status */
|
|
if (res != FR_OK) return res;
|
|
dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase the directory size by cluster size */
|
|
st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize); /* Update the allocation status */
|
|
st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize);
|
|
fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1;
|
|
res = store_xdir(&dj); /* Store the object status */
|
|
if (res != FR_OK) return res;
|
|
}
|
|
}
|
|
|
|
create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */
|
|
return FR_OK;
|
|
}
|
|
#endif
|
|
/* On the FAT/FAT32 volume */
|
|
mem_cpy(sn, dp->fn, 12);
|
|
if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
|
|
dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */
|
|
for (n = 1; n < 100; n++) {
|
|
gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */
|
|
res = dir_find(dp); /* Check if the name collides with existing SFN */
|
|
if (res != FR_OK) break;
|
|
}
|
|
if (n == 100) return FR_DENIED; /* Abort if too many collisions */
|
|
if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
|
|
dp->fn[NSFLAG] = sn[NSFLAG];
|
|
}
|
|
|
|
/* Create an SFN with/without LFNs. */
|
|
nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */
|
|
res = dir_alloc(dp, nent); /* Allocate entries */
|
|
if (res == FR_OK && --nent) { /* Set LFN entry if needed */
|
|
res = dir_sdi(dp, dp->dptr - nent * SZDIRE);
|
|
if (res == FR_OK) {
|
|
sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
|
|
do { /* Store LFN entries in bottom first */
|
|
res = move_window(fs, dp->sect);
|
|
if (res != FR_OK) break;
|
|
put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum);
|
|
fs->wflag = 1;
|
|
res = dir_next(dp, 0); /* Next entry */
|
|
} while (res == FR_OK && --nent);
|
|
}
|
|
}
|
|
|
|
#else /* Non LFN configuration */
|
|
res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
|
|
|
|
#endif
|
|
|
|
/* Set SFN entry */
|
|
if (res == FR_OK) {
|
|
res = move_window(fs, dp->sect);
|
|
if (res == FR_OK) {
|
|
mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */
|
|
mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */
|
|
#if FF_USE_LFN
|
|
dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
|
|
#endif
|
|
fs->wflag = 1;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY && FF_FS_MINIMIZE == 0
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Remove an object from the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
|
|
DIR* dp /* Directory object pointing the entry to be removed */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs = dp->obj.fs;
|
|
#if FF_USE_LFN /* LFN configuration */
|
|
DWORD last = dp->dptr;
|
|
|
|
res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */
|
|
if (res == FR_OK) {
|
|
do {
|
|
res = move_window(fs, dp->sect);
|
|
if (res != FR_OK) break;
|
|
/* Mark an entry 'deleted' */
|
|
if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
|
|
dp->dir[XDIR_Type] &= 0x7F;
|
|
} else { /* On the FAT/FAT32 volume */
|
|
dp->dir[DIR_Name] = DDEM;
|
|
}
|
|
fs->wflag = 1;
|
|
if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */
|
|
res = dir_next(dp, 0); /* Next entry */
|
|
} while (res == FR_OK);
|
|
if (res == FR_NO_FILE) res = FR_INT_ERR;
|
|
}
|
|
#else /* Non LFN configuration */
|
|
|
|
res = move_window(fs, dp->sect);
|
|
if (res == FR_OK) {
|
|
dp->dir[DIR_Name] = DDEM;
|
|
fs->wflag = 1;
|
|
}
|
|
#endif
|
|
|
|
return res;
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY && FF_FS_MINIMIZE == 0 */
|
|
|
|
|
|
|
|
#if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get file information from directory entry */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
void get_fileinfo ( /* No return code */
|
|
DIR* dp, /* Pointer to the directory object */
|
|
FILINFO* fno /* Pointer to the file information to be filled */
|
|
)
|
|
{
|
|
UINT i, j;
|
|
TCHAR c;
|
|
DWORD tm;
|
|
#if FF_USE_LFN
|
|
WCHAR w, lfv;
|
|
FATFS *fs = dp->obj.fs;
|
|
#endif
|
|
|
|
|
|
fno->fname[0] = 0; /* Invaidate file info */
|
|
if (dp->sect == 0) return; /* Exit if read pointer has reached end of directory */
|
|
|
|
#if FF_USE_LFN /* LFN configuration */
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
|
|
get_xdir_info(fs->dirbuf, fno);
|
|
return;
|
|
} else
|
|
#endif
|
|
{ /* On the FAT/FAT32 volume */
|
|
if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */
|
|
i = j = 0;
|
|
while ((w = fs->lfnbuf[j++]) != 0) { /* Get an LFN character */
|
|
#if !FF_LFN_UNICODE /* ANSI/OEM API */
|
|
w = ff_uni2oem(w, CODEPAGE); /* Unicode -> OEM */
|
|
if (w == 0) { i = 0; break; } /* No LFN if it could not be converted */
|
|
if (w >= 0x100) { /* Put 1st byte if it is a DBC */
|
|
fno->fname[i++] = (char)(w >> 8);
|
|
}
|
|
#endif
|
|
if (i >= FF_MAX_LFN) { i = 0; break; } /* No LFN if buffer overflow */
|
|
fno->fname[i++] = (TCHAR)w;
|
|
}
|
|
fno->fname[i] = 0; /* Terminate the LFN */
|
|
}
|
|
}
|
|
|
|
i = j = 0;
|
|
lfv = fno->fname[i]; /* LFN is exist if non-zero */
|
|
while (i < 11) { /* Copy name body and extension */
|
|
c = (TCHAR)dp->dir[i++];
|
|
if (c == ' ') continue; /* Skip padding spaces */
|
|
if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
|
|
if (i == 9) { /* Insert a . if extension is exist */
|
|
if (!lfv) fno->fname[j] = '.';
|
|
fno->altname[j++] = '.';
|
|
}
|
|
#if FF_LFN_UNICODE /* Unicode API */
|
|
if (dbc_1st((BYTE)c) && i != 8 && i != 11 && dbc_2nd(dp->dir[i])) {
|
|
c = c << 8 | dp->dir[i++];
|
|
}
|
|
c = ff_oem2uni(c, CODEPAGE); /* OEM -> Unicode */
|
|
if (!c) c = '?';
|
|
#endif
|
|
fno->altname[j] = c;
|
|
if (!lfv) {
|
|
if (IsUpper(c) && (dp->dir[DIR_NTres] & ((i >= 9) ? NS_EXT : NS_BODY))) {
|
|
c += 0x20; /* To lower */
|
|
}
|
|
fno->fname[j] = c;
|
|
}
|
|
j++;
|
|
}
|
|
if (!lfv) {
|
|
fno->fname[j] = 0;
|
|
if (!dp->dir[DIR_NTres]) j = 0; /* Altname is no longer needed if neither LFN nor case info is exist. */
|
|
}
|
|
fno->altname[j] = 0; /* Terminate the SFN */
|
|
|
|
#else /* Non-LFN configuration */
|
|
i = j = 0;
|
|
while (i < 11) { /* Copy name body and extension */
|
|
c = (TCHAR)dp->dir[i++];
|
|
if (c == ' ') continue; /* Skip padding spaces */
|
|
if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
|
|
if (i == 9) fno->fname[j++] = '.'; /* Insert a . if extension is exist */
|
|
fno->fname[j++] = c;
|
|
}
|
|
fno->fname[j] = 0;
|
|
#endif
|
|
|
|
fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */
|
|
fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */
|
|
tm = ld_dword(dp->dir + DIR_ModTime); /* Timestamp */
|
|
fno->ftime = (WORD)tm; fno->fdate = (WORD)(tm >> 16);
|
|
}
|
|
|
|
#endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */
|
|
|
|
|
|
|
|
#if FF_USE_FIND && FF_FS_MINIMIZE <= 1
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Pattern matching */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */
|
|
const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */
|
|
)
|
|
{
|
|
WCHAR chr;
|
|
|
|
#if FF_LFN_UNICODE && FF_USE_LFN /* Unicode API */
|
|
chr = ff_wtoupper(*(*ptr)++); /* Get a Unicode char and to upper */
|
|
#else /* ANSI/OEM API */
|
|
chr = (BYTE)*(*ptr)++; /* Get a byte */
|
|
if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
|
|
#if FF_CODE_PAGE == 0
|
|
if (ExCvt && chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
|
|
#elif FF_CODE_PAGE < 900
|
|
if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
|
|
#endif
|
|
#if FF_CODE_PAGE == 0 || FF_CODE_PAGE >= 900
|
|
if (dbc_1st((BYTE)chr) && dbc_2nd((BYTE)**ptr)) { /* Get DBC 2nd byte if needed */
|
|
chr = chr << 8 | (BYTE)*(*ptr)++;
|
|
}
|
|
#endif
|
|
#endif
|
|
return chr;
|
|
}
|
|
|
|
|
|
static
|
|
int pattern_matching ( /* 0:not matched, 1:matched */
|
|
const TCHAR* pat, /* Matching pattern */
|
|
const TCHAR* nam, /* String to be tested */
|
|
int skip, /* Number of pre-skip chars (number of ?s) */
|
|
int inf /* Infinite search (* specified) */
|
|
)
|
|
{
|
|
const TCHAR *pp, *np;
|
|
WCHAR pc, nc;
|
|
int nm, nx;
|
|
|
|
|
|
while (skip--) { /* Pre-skip name chars */
|
|
if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
|
|
}
|
|
if (!*pat && inf) return 1; /* (short circuit) */
|
|
|
|
do {
|
|
pp = pat; np = nam; /* Top of pattern and name to match */
|
|
for (;;) {
|
|
if (*pp == '?' || *pp == '*') { /* Wildcard? */
|
|
nm = nx = 0;
|
|
do { /* Analyze the wildcard chars */
|
|
if (*pp++ == '?') nm++; else nx = 1;
|
|
} while (*pp == '?' || *pp == '*');
|
|
if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
|
|
nc = *np; break; /* Branch mismatched */
|
|
}
|
|
pc = get_achar(&pp); /* Get a pattern char */
|
|
nc = get_achar(&np); /* Get a name char */
|
|
if (pc != nc) break; /* Branch mismatched? */
|
|
if (pc == 0) return 1; /* Branch matched? (matched at end of both strings) */
|
|
}
|
|
get_achar(&nam); /* nam++ */
|
|
} while (inf && nc); /* Retry until end of name if infinite search is specified */
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Pick a top segment and create the object name in directory form */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
|
|
DIR* dp, /* Pointer to the directory object */
|
|
const TCHAR** path /* Pointer to pointer to the segment in the path string */
|
|
)
|
|
{
|
|
#if FF_USE_LFN /* LFN configuration */
|
|
BYTE b, cf;
|
|
WCHAR w, *lfn;
|
|
UINT i, ni, si, di;
|
|
const TCHAR *p;
|
|
|
|
|
|
/* Create LFN in Unicode */
|
|
p = *path; lfn = dp->obj.fs->lfnbuf; si = di = 0;
|
|
for (;;) {
|
|
w = p[si++]; /* Get a character */
|
|
if (w < ' ') break; /* Break if end of the path name */
|
|
if (w == '/' || w == '\\') { /* Break if a separator is found */
|
|
while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */
|
|
break;
|
|
}
|
|
if (di >= FF_MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */
|
|
#if !FF_LFN_UNICODE /* ANSI/OEM API */
|
|
w &= 0xFF;
|
|
if (dbc_1st((BYTE)w)) { /* Check if it is a DBC 1st byte */
|
|
b = (BYTE)p[si++]; /* Get 2nd byte */
|
|
w = (w << 8) + b; /* Create a DBC */
|
|
if (!dbc_2nd(b)) return FR_INVALID_NAME; /* Reject invalid sequence */
|
|
}
|
|
w = ff_oem2uni(w, CODEPAGE); /* Convert ANSI/OEM to Unicode */
|
|
if (!w) return FR_INVALID_NAME; /* Reject invalid code */
|
|
#endif
|
|
if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */
|
|
lfn[di++] = w; /* Store the Unicode character */
|
|
}
|
|
*path = &p[si]; /* Return pointer to the next segment */
|
|
cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */
|
|
#if FF_FS_RPATH != 0
|
|
if ((di == 1 && lfn[di - 1] == '.') ||
|
|
(di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */
|
|
lfn[di] = 0;
|
|
for (i = 0; i < 11; i++) /* Create dot name for SFN entry */
|
|
dp->fn[i] = (i < di) ? '.' : ' ';
|
|
dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
|
|
return FR_OK;
|
|
}
|
|
#endif
|
|
while (di) { /* Snip off trailing spaces and dots if exist */
|
|
w = lfn[di - 1];
|
|
if (w != ' ' && w != '.') break;
|
|
di--;
|
|
}
|
|
lfn[di] = 0; /* LFN is created */
|
|
if (di == 0) return FR_INVALID_NAME; /* Reject nul name */
|
|
|
|
/* Create SFN in directory form */
|
|
mem_set(dp->fn, ' ', 11);
|
|
for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
|
|
if (si > 0) cf |= NS_LOSS | NS_LFN;
|
|
while (di > 0 && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
|
|
|
|
i = b = 0; ni = 8;
|
|
for (;;) {
|
|
w = lfn[si++]; /* Get an LFN character */
|
|
if (!w) break; /* Break on end of the LFN */
|
|
if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
|
|
cf |= NS_LOSS | NS_LFN;
|
|
continue;
|
|
}
|
|
|
|
if (i >= ni || si == di) { /* Entered extension or end of SFN */
|
|
if (ni == 11) { /* Extension fileld overflow? */
|
|
cf |= NS_LOSS | NS_LFN;
|
|
break;
|
|
}
|
|
if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
|
|
if (si > di) break; /* No extension */
|
|
si = di; i = 8; ni = 11; /* Enter extension fileld */
|
|
b <<= 2; continue;
|
|
}
|
|
|
|
if (w >= 0x80) { /* Is this a non-ASCII character? */
|
|
cf |= NS_LFN; /* Force to create LFN entry */
|
|
#if FF_CODE_PAGE == 0
|
|
if (ExCvt) { /* In SBCS */
|
|
w = ff_uni2oem(w, CODEPAGE); /* Unicode -> OEM code */
|
|
if (w & 0x80) w = ExCvt[w & 0x7F]; /* Convert extended character to upper (SBCS) */
|
|
} else { /* In DBCS */
|
|
w = ff_uni2oem(ff_wtoupper(w), CODEPAGE); /* Upper converted Unicode -> OEM code */
|
|
}
|
|
#elif FF_CODE_PAGE < 900 /* SBCS cfg */
|
|
w = ff_uni2oem(w, CODEPAGE); /* Unicode -> OEM code */
|
|
if (w & 0x80) w = ExCvt[w & 0x7F]; /* Convert extended character to upper (SBCS) */
|
|
#else /* DBCS cfg */
|
|
w = ff_uni2oem(ff_wtoupper(w), CODEPAGE); /* Upper converted Unicode -> OEM code */
|
|
#endif
|
|
}
|
|
|
|
if (w >= 0x100) { /* Is this a DBC? */
|
|
if (i >= ni - 1) { /* Field overflow? */
|
|
cf |= NS_LOSS | NS_LFN;
|
|
i = ni; continue; /* Next field */
|
|
}
|
|
dp->fn[i++] = (BYTE)(w >> 8); /* Put 1st byte */
|
|
} else { /* SBC */
|
|
if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */
|
|
w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
|
|
} else {
|
|
if (IsUpper(w)) { /* ASCII large capital */
|
|
b |= 2;
|
|
} else {
|
|
if (IsLower(w)) { /* ASCII small capital */
|
|
b |= 1; w -= 0x20;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
dp->fn[i++] = (BYTE)w;
|
|
}
|
|
|
|
if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
|
|
|
|
if (ni == 8) b <<= 2;
|
|
if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* Create LFN entry when there are composite capitals */
|
|
if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
|
|
if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
|
|
if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
|
|
}
|
|
|
|
dp->fn[NSFLAG] = cf; /* SFN is created */
|
|
|
|
return FR_OK;
|
|
|
|
|
|
#else /* FF_USE_LFN : Non-LFN configuration */
|
|
BYTE c, d, *sfn;
|
|
UINT ni, si, i;
|
|
const char *p;
|
|
|
|
/* Create file name in directory form */
|
|
p = *path; sfn = dp->fn;
|
|
mem_set(sfn, ' ', 11);
|
|
si = i = 0; ni = 8;
|
|
#if FF_FS_RPATH != 0
|
|
if (p[si] == '.') { /* Is this a dot entry? */
|
|
for (;;) {
|
|
c = (BYTE)p[si++];
|
|
if (c != '.' || si >= 3) break;
|
|
sfn[i++] = c;
|
|
}
|
|
if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
|
|
*path = p + si; /* Return pointer to the next segment */
|
|
sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */
|
|
return FR_OK;
|
|
}
|
|
#endif
|
|
for (;;) {
|
|
c = (BYTE)p[si++];
|
|
if (c <= ' ') break; /* Break if end of the path name */
|
|
if (c == '/' || c == '\\') { /* Break if a separator is found */
|
|
while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */
|
|
break;
|
|
}
|
|
if (c == '.' || i >= ni) { /* End of body or over size? */
|
|
if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Over size or invalid dot */
|
|
i = 8; ni = 11; /* Goto extension */
|
|
continue;
|
|
}
|
|
#if FF_CODE_PAGE == 0
|
|
if (ExCvt && c >= 0x80) { /* Is SBC extended character? */
|
|
c = ExCvt[c - 0x80]; /* To upper SBC extended character */
|
|
}
|
|
#elif FF_CODE_PAGE < 900
|
|
if (c >= 0x80) { /* Is SBC extended character? */
|
|
c = ExCvt[c - 0x80]; /* To upper SBC extended character */
|
|
}
|
|
#endif
|
|
if (dbc_1st(c)) { /* Check if it is a DBC 1st byte */
|
|
d = (BYTE)p[si++]; /* Get 2nd byte */
|
|
if (!dbc_2nd(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */
|
|
sfn[i++] = c;
|
|
sfn[i++] = d;
|
|
} else { /* SBC */
|
|
if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */
|
|
if (IsLower(c)) c -= 0x20; /* To upper */
|
|
sfn[i++] = c;
|
|
}
|
|
}
|
|
*path = p + si; /* Return pointer to the next segment */
|
|
if (i == 0) return FR_INVALID_NAME; /* Reject nul string */
|
|
|
|
if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
|
|
sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */
|
|
|
|
return FR_OK;
|
|
#endif /* FF_USE_LFN */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Follow a file path */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
|
|
DIR* dp, /* Directory object to return last directory and found object */
|
|
const TCHAR* path /* Full-path string to find a file or directory */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE ns;
|
|
FATFS *fs = dp->obj.fs;
|
|
|
|
|
|
#if FF_FS_RPATH != 0
|
|
if (*path != '/' && *path != '\\') { /* Without heading separator */
|
|
dp->obj.sclust = fs->cdir; /* Start from current directory */
|
|
} else
|
|
#endif
|
|
{ /* With heading separator */
|
|
while (*path == '/' || *path == '\\') path++; /* Strip heading separator */
|
|
dp->obj.sclust = 0; /* Start from root directory */
|
|
}
|
|
#if FF_FS_EXFAT
|
|
dp->obj.n_frag = 0; /* Invalidate last fragment counter of the object */
|
|
#if FF_FS_RPATH != 0
|
|
if (fs->fs_type == FS_EXFAT && dp->obj.sclust) { /* exFAT: Retrieve the sub-directory's status */
|
|
DIR dj;
|
|
|
|
dp->obj.c_scl = fs->cdc_scl;
|
|
dp->obj.c_size = fs->cdc_size;
|
|
dp->obj.c_ofs = fs->cdc_ofs;
|
|
res = load_obj_xdir(&dj, &dp->obj);
|
|
if (res != FR_OK) return res;
|
|
dp->obj.objsize = ld_dword(fs->dirbuf + XDIR_FileSize);
|
|
dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
|
|
dp->fn[NSFLAG] = NS_NONAME;
|
|
res = dir_sdi(dp, 0);
|
|
|
|
} else { /* Follow path */
|
|
for (;;) {
|
|
res = create_name(dp, &path); /* Get a segment name of the path */
|
|
if (res != FR_OK) break;
|
|
res = dir_find(dp); /* Find an object with the segment name */
|
|
ns = dp->fn[NSFLAG];
|
|
if (res != FR_OK) { /* Failed to find the object */
|
|
if (res == FR_NO_FILE) { /* Object is not found */
|
|
if (FF_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */
|
|
if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
|
|
dp->fn[NSFLAG] = NS_NONAME;
|
|
res = FR_OK;
|
|
} else { /* Could not find the object */
|
|
if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
|
|
/* Get into the sub-directory */
|
|
if (!(dp->obj.attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */
|
|
res = FR_NO_PATH; break;
|
|
}
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* Save containing directory information for next dir */
|
|
dp->obj.c_scl = dp->obj.sclust;
|
|
dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
|
|
dp->obj.c_ofs = dp->blk_ofs;
|
|
dp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Open next directory */
|
|
dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
|
|
dp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
|
|
} else
|
|
#endif
|
|
{
|
|
dp->obj.sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */
|
|
}
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get logical drive number from path name */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */
|
|
const TCHAR** path /* Pointer to pointer to the path name */
|
|
)
|
|
{
|
|
const TCHAR *tp, *tt;
|
|
UINT i;
|
|
int vol = -1;
|
|
#if FF_STR_VOLUME_ID /* Find string drive id */
|
|
static const char* const volid[] = {FF_VOLUME_STRS};
|
|
const char *sp;
|
|
char c;
|
|
TCHAR tc;
|
|
#endif
|
|
|
|
|
|
if (*path) { /* If the pointer is not a null */
|
|
for (tt = *path; (UINT)*tt >= (FF_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find a colon in the path */
|
|
if (*tt == ':') { /* If a colon is exist in the path name */
|
|
tp = *path;
|
|
i = *tp++;
|
|
if (IsDigit(i) && tp == tt) { /* Is there a numeric drive id + colon? */
|
|
if ((i -= '0') < FF_VOLUMES) { /* If drive id is found, get the value and strip it */
|
|
vol = (int)i;
|
|
*path = ++tt;
|
|
}
|
|
}
|
|
#if FF_STR_VOLUME_ID
|
|
else { /* No numeric drive number, find string drive id */
|
|
i = 0; tt++;
|
|
do {
|
|
sp = volid[i]; tp = *path;
|
|
do { /* Compare a string drive id with path name */
|
|
c = *sp++; tc = *tp++;
|
|
if (IsLower(tc)) tc -= 0x20;
|
|
} while (c && (TCHAR)c == tc);
|
|
} while ((c || tp != tt) && ++i < FF_VOLUMES); /* Repeat for each id until pattern match */
|
|
if (i < FF_VOLUMES) { /* If a drive id is found, get the value and strip it */
|
|
vol = (int)i;
|
|
*path = tt;
|
|
}
|
|
}
|
|
#endif
|
|
} else { /* No volume id and use default drive */
|
|
#if FF_FS_RPATH != 0 && FF_VOLUMES >= 2
|
|
vol = CurrVol; /* Current drive */
|
|
#else
|
|
vol = 0; /* Drive 0 */
|
|
#endif
|
|
}
|
|
}
|
|
return vol;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Load a sector and check if it is an FAT VBR */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
BYTE check_fs ( /* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4:Disk error */
|
|
FATFS* fs, /* Filesystem object */
|
|
DWORD sect /* Sector# (lba) to load and check if it is an FAT-VBR or not */
|
|
)
|
|
{
|
|
fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
|
|
if (move_window(fs, sect) != FR_OK) return 4; /* Load boot record */
|
|
|
|
if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3; /* Check boot record signature (always placed here even if the sector size is >512) */
|
|
|
|
#if FF_FS_EXFAT
|
|
if (!mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; /* Check if exFAT VBR */
|
|
#endif
|
|
if (fs->win[BS_JmpBoot] == 0xE9 || (fs->win[BS_JmpBoot] == 0xEB && fs->win[BS_JmpBoot + 2] == 0x90)) { /* Valid JumpBoot code? */
|
|
if (!mem_cmp(fs->win + BS_FilSysType, "FAT", 3)) return 0; /* Is it an FAT VBR? */
|
|
if (!mem_cmp(fs->win + BS_FilSysType32, "FAT32", 5)) return 0; /* Is it an FAT32 VBR? */
|
|
}
|
|
return 2; /* Valid BS but not FAT */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Find logical drive and check if the volume is mounted */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */
|
|
const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
|
|
FATFS** rfs, /* Pointer to pointer to the found filesystem object */
|
|
BYTE mode /* !=0: Check write protection for write access */
|
|
)
|
|
{
|
|
BYTE fmt, *pt;
|
|
int vol;
|
|
DSTATUS stat;
|
|
DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];
|
|
WORD nrsv;
|
|
FATFS *fs;
|
|
UINT i;
|
|
|
|
|
|
/* Get logical drive number */
|
|
*rfs = 0;
|
|
vol = get_ldnumber(path);
|
|
if (vol < 0) return FR_INVALID_DRIVE;
|
|
|
|
/* Check if the filesystem object is valid or not */
|
|
fs = FatFs[vol]; /* Get pointer to the filesystem object */
|
|
if (!fs) return FR_NOT_ENABLED; /* Is the filesystem object available? */
|
|
#if FF_FS_REENTRANT
|
|
if (!lock_fs(fs)) return FR_TIMEOUT; /* Lock the volume */
|
|
#endif
|
|
*rfs = fs; /* Return pointer to the filesystem object */
|
|
|
|
mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */
|
|
if (fs->fs_type != 0) { /* If the volume has been mounted */
|
|
stat = disk_status(fs->pdrv);
|
|
if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
|
|
if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */
|
|
return FR_WRITE_PROTECTED;
|
|
}
|
|
return FR_OK; /* The filesystem object is valid */
|
|
}
|
|
}
|
|
|
|
/* The filesystem object is not valid. */
|
|
/* Following code attempts to mount the volume. (analyze BPB and initialize the filesystem object) */
|
|
|
|
fs->fs_type = 0; /* Clear the filesystem object */
|
|
fs->pdrv = LD2PD(vol); /* Bind the logical drive and a physical drive */
|
|
stat = disk_initialize(fs->pdrv); /* Initialize the physical drive */
|
|
if (stat & STA_NOINIT) { /* Check if the initialization succeeded */
|
|
return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
|
|
}
|
|
if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */
|
|
return FR_WRITE_PROTECTED;
|
|
}
|
|
#if FF_MAX_SS != FF_MIN_SS /* Get sector size (multiple sector size cfg only) */
|
|
if (disk_ioctl(fs->pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR;
|
|
if (SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR;
|
|
#endif
|
|
|
|
/* Find an FAT partition on the drive. Supports only generic partitioning rules, FDISK and SFD. */
|
|
bsect = 0;
|
|
fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT-VBR as SFD */
|
|
if (fmt == 2 || (fmt < 2 && LD2PT(vol) != 0)) { /* Not an FAT-VBR or forced partition number */
|
|
for (i = 0; i < 4; i++) { /* Get partition offset */
|
|
pt = fs->win + (MBR_Table + i * SZ_PTE);
|
|
br[i] = pt[PTE_System] ? ld_dword(pt + PTE_StLba) : 0;
|
|
}
|
|
i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */
|
|
if (i != 0) i--;
|
|
do { /* Find an FAT volume */
|
|
bsect = br[i];
|
|
fmt = bsect ? check_fs(fs, bsect) : 3; /* Check the partition */
|
|
} while (LD2PT(vol) == 0 && fmt >= 2 && ++i < 4);
|
|
}
|
|
if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
|
|
if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */
|
|
|
|
/* An FAT volume is found (bsect). Following code initializes the filesystem object */
|
|
|
|
#if FF_FS_EXFAT
|
|
if (fmt == 1) {
|
|
QWORD maxlba;
|
|
|
|
for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */
|
|
if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM;
|
|
|
|
if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT version (must be version 1.0) */
|
|
|
|
if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) { /* (BPB_BytsPerSecEx must be equal to the physical sector size) */
|
|
return FR_NO_FILESYSTEM;
|
|
}
|
|
|
|
maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA + 1 of the volume */
|
|
if (maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be handled in 32-bit LBA) */
|
|
|
|
fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */
|
|
|
|
fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */
|
|
if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */
|
|
|
|
fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */
|
|
if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768) */
|
|
|
|
nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */
|
|
if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */
|
|
fs->n_fatent = nclst + 2;
|
|
|
|
/* Boundaries and Limits */
|
|
fs->volbase = bsect;
|
|
fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx);
|
|
fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx);
|
|
if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */
|
|
fs->dirbase = ld_dword(fs->win + BPB_RootClusEx);
|
|
|
|
/* Check if bitmap location is in assumption (at the first cluster) */
|
|
if (move_window(fs, clst2sect(fs, fs->dirbase)) != FR_OK) return FR_DISK_ERR;
|
|
for (i = 0; i < SS(fs); i += SZDIRE) {
|
|
if (fs->win[i] == 0x81 && ld_dword(fs->win + i + 20) == 2) break; /* 81 entry with cluster #2? */
|
|
}
|
|
if (i == SS(fs)) return FR_NO_FILESYSTEM;
|
|
#if !FF_FS_READONLY
|
|
fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
|
|
#endif
|
|
fmt = FS_EXFAT; /* FAT sub-type */
|
|
} else
|
|
#endif /* FF_FS_EXFAT */
|
|
{
|
|
if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */
|
|
|
|
fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
|
|
if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32);
|
|
fs->fsize = fasize;
|
|
|
|
fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */
|
|
if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
|
|
fasize *= fs->n_fats; /* Number of sectors for FAT area */
|
|
|
|
fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */
|
|
if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */
|
|
|
|
fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
|
|
if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */
|
|
|
|
tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
|
|
if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32);
|
|
|
|
nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
|
|
if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */
|
|
|
|
/* Determine the FAT sub type */
|
|
sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + DIR */
|
|
if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
|
|
nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
|
|
if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
|
|
fmt = 0;
|
|
if (nclst <= MAX_FAT32) fmt = FS_FAT32;
|
|
if (nclst <= MAX_FAT16) fmt = FS_FAT16;
|
|
if (nclst <= MAX_FAT12) fmt = FS_FAT12;
|
|
if (fmt == 0) return FR_NO_FILESYSTEM;
|
|
|
|
/* Boundaries and Limits */
|
|
fs->n_fatent = nclst + 2; /* Number of FAT entries */
|
|
fs->volbase = bsect; /* Volume start sector */
|
|
fs->fatbase = bsect + nrsv; /* FAT start sector */
|
|
fs->database = bsect + sysect; /* Data start sector */
|
|
if (fmt == FS_FAT32) {
|
|
if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */
|
|
if (fs->n_rootdir != 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
|
|
fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */
|
|
szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
|
|
} else {
|
|
if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
|
|
fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
|
|
szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
|
|
fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
|
|
}
|
|
if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */
|
|
|
|
#if !FF_FS_READONLY
|
|
/* Get FSInfo if available */
|
|
fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
|
|
fs->fsi_flag = 0x80;
|
|
#if (FF_FS_NOFSINFO & 3) != 3
|
|
if (fmt == FS_FAT32 /* Allow to update FSInfo only if BPB_FSInfo32 == 1 */
|
|
&& ld_word(fs->win + BPB_FSInfo32) == 1
|
|
&& move_window(fs, bsect + 1) == FR_OK)
|
|
{
|
|
fs->fsi_flag = 0;
|
|
if (ld_word(fs->win + BS_55AA) == 0xAA55 /* Load FSInfo data if available */
|
|
&& ld_dword(fs->win + FSI_LeadSig) == 0x41615252
|
|
&& ld_dword(fs->win + FSI_StrucSig) == 0x61417272)
|
|
{
|
|
#if (FF_FS_NOFSINFO & 1) == 0
|
|
fs->free_clst = ld_dword(fs->win + FSI_Free_Count);
|
|
#endif
|
|
#if (FF_FS_NOFSINFO & 2) == 0
|
|
fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free);
|
|
#endif
|
|
}
|
|
}
|
|
#endif /* (FF_FS_NOFSINFO & 3) != 3 */
|
|
#endif /* !FF_FS_READONLY */
|
|
}
|
|
|
|
fs->fs_type = fmt; /* FAT sub-type */
|
|
fs->id = ++Fsid; /* Volume mount ID */
|
|
#if FF_USE_LFN == 1
|
|
fs->lfnbuf = LfnBuf; /* Static LFN working buffer */
|
|
#if FF_FS_EXFAT
|
|
fs->dirbuf = DirBuf; /* Static directory block scratchpad buuffer */
|
|
#endif
|
|
#endif
|
|
#if FF_FS_RPATH != 0
|
|
fs->cdir = 0; /* Initialize current directory */
|
|
#endif
|
|
#if FF_FS_LOCK != 0 /* Clear file lock semaphores */
|
|
clear_lock(fs);
|
|
#endif
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Check if the file/directory object is valid or not */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */
|
|
FFOBJID* obj, /* Pointer to the FFOBJID, the 1st member in the FIL/DIR object, to check validity */
|
|
FATFS** rfs /* Pointer to pointer to the owner filesystem object to return */
|
|
)
|
|
{
|
|
FRESULT res = FR_INVALID_OBJECT;
|
|
|
|
|
|
if (obj && obj->fs && obj->fs->fs_type && obj->id == obj->fs->id) { /* Test if the object is valid */
|
|
#if FF_FS_REENTRANT
|
|
if (lock_fs(obj->fs)) { /* Obtain the filesystem object */
|
|
if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */
|
|
res = FR_OK;
|
|
} else {
|
|
unlock_fs(obj->fs, FR_OK);
|
|
}
|
|
} else {
|
|
res = FR_TIMEOUT;
|
|
}
|
|
#else
|
|
if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */
|
|
res = FR_OK;
|
|
}
|
|
#endif
|
|
}
|
|
*rfs = (res == FR_OK) ? obj->fs : 0; /* Corresponding filesystem object */
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*---------------------------------------------------------------------------
|
|
|
|
Public Functions (FatFs API)
|
|
|
|
----------------------------------------------------------------------------*/
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Mount/Unmount a Logical Drive */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_mount (
|
|
FATFS* fs, /* Pointer to the filesystem object (NULL:unmount)*/
|
|
const TCHAR* path, /* Logical drive number to be mounted/unmounted */
|
|
BYTE opt /* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */
|
|
)
|
|
{
|
|
FATFS *cfs;
|
|
int vol;
|
|
FRESULT res;
|
|
const TCHAR *rp = path;
|
|
|
|
|
|
/* Get logical drive number */
|
|
vol = get_ldnumber(&rp);
|
|
if (vol < 0) return FR_INVALID_DRIVE;
|
|
cfs = FatFs[vol]; /* Pointer to fs object */
|
|
|
|
if (cfs) {
|
|
#if FF_FS_LOCK != 0
|
|
clear_lock(cfs);
|
|
#endif
|
|
#if FF_FS_REENTRANT /* Discard sync object of the current volume */
|
|
if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
|
|
#endif
|
|
cfs->fs_type = 0; /* Clear old fs object */
|
|
}
|
|
|
|
if (fs) {
|
|
fs->fs_type = 0; /* Clear new fs object */
|
|
#if FF_FS_REENTRANT /* Create sync object for the new volume */
|
|
if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
|
|
#endif
|
|
}
|
|
FatFs[vol] = fs; /* Register new fs object */
|
|
|
|
if (opt == 0) return FR_OK; /* Do not mount now, it will be mounted later */
|
|
|
|
res = find_volume(&path, &fs, 0); /* Force mounted the volume */
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Open or Create a File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_open (
|
|
FIL* fp, /* Pointer to the blank file object */
|
|
const TCHAR* path, /* Pointer to the file name */
|
|
BYTE mode /* Access mode and file open mode flags */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
FATFS *fs;
|
|
#if !FF_FS_READONLY
|
|
DWORD dw, cl, bcs, clst, sc;
|
|
FSIZE_t ofs;
|
|
#endif
|
|
DEF_NAMBUF
|
|
|
|
|
|
if (!fp) return FR_INVALID_OBJECT;
|
|
|
|
/* Get logical drive */
|
|
mode &= FF_FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND | FA_SEEKEND;
|
|
res = find_volume(&path, &fs, mode);
|
|
if (res == FR_OK) {
|
|
dj.obj.fs = fs;
|
|
INIT_NAMBUF(fs);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
#if !FF_FS_READONLY /* Read/Write configuration */
|
|
if (res == FR_OK) {
|
|
if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */
|
|
res = FR_INVALID_NAME;
|
|
}
|
|
#if FF_FS_LOCK != 0
|
|
else {
|
|
res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Check if the file can be used */
|
|
}
|
|
#endif
|
|
}
|
|
/* Create or Open a file */
|
|
if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
|
|
if (res != FR_OK) { /* No file, create new */
|
|
if (res == FR_NO_FILE) { /* There is no file to open, create a new entry */
|
|
#if FF_FS_LOCK != 0
|
|
res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
|
|
#else
|
|
res = dir_register(&dj);
|
|
#endif
|
|
}
|
|
mode |= FA_CREATE_ALWAYS; /* File is created */
|
|
}
|
|
else { /* Any object with the same name is already existing */
|
|
if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
|
|
res = FR_DENIED;
|
|
} else {
|
|
if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */
|
|
}
|
|
}
|
|
if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate the file if overwrite mode */
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
/* Get current allocation info */
|
|
fp->obj.fs = fs;
|
|
fp->obj.sclust = cl = ld_dword(fs->dirbuf + XDIR_FstClus);
|
|
fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
|
|
fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
|
|
fp->obj.n_frag = 0;
|
|
/* Set directory entry block initial state */
|
|
mem_set(fs->dirbuf + 2, 0, 30); /* Clear 85 entry except for NumSec */
|
|
mem_set(fs->dirbuf + 38, 0, 26); /* Clear C0 entry except for NumName and NameHash */
|
|
fs->dirbuf[XDIR_Attr] = AM_ARC;
|
|
st_dword(fs->dirbuf + XDIR_CrtTime, GET_FATTIME());
|
|
fs->dirbuf[XDIR_GenFlags] = 1;
|
|
res = store_xdir(&dj);
|
|
if (res == FR_OK && cl != 0) { /* Remove the cluster chain if exist */
|
|
res = remove_chain(&fp->obj, cl, 0);
|
|
fs->last_clst = cl - 1; /* Reuse the cluster hole */
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
/* Set directory entry initial state */
|
|
cl = ld_clust(fs, dj.dir); /* Get current cluster chain */
|
|
st_dword(dj.dir + DIR_CrtTime, GET_FATTIME()); /* Set created time */
|
|
dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */
|
|
st_clust(fs, dj.dir, 0); /* Reset file allocation info */
|
|
st_dword(dj.dir + DIR_FileSize, 0);
|
|
fs->wflag = 1;
|
|
if (cl != 0) { /* Remove the cluster chain if exist */
|
|
dw = fs->winsect;
|
|
res = remove_chain(&dj.obj, cl, 0);
|
|
if (res == FR_OK) {
|
|
res = move_window(fs, dw);
|
|
fs->last_clst = cl - 1; /* Reuse the cluster hole */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else { /* Open an existing file */
|
|
if (res == FR_OK) { /* Is the object exsiting? */
|
|
if (dj.obj.attr & AM_DIR) { /* File open against a directory */
|
|
res = FR_NO_FILE;
|
|
} else {
|
|
if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* Write mode open against R/O file */
|
|
res = FR_DENIED;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
if (mode & FA_CREATE_ALWAYS) mode |= FA_MODIFIED; /* Set file change flag if created or overwritten */
|
|
fp->dir_sect = fs->winsect; /* Pointer to the directory entry */
|
|
fp->dir_ptr = dj.dir;
|
|
#if FF_FS_LOCK != 0
|
|
fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Lock the file for this session */
|
|
if (!fp->obj.lockid) res = FR_INT_ERR;
|
|
#endif
|
|
}
|
|
#else /* R/O configuration */
|
|
if (res == FR_OK) {
|
|
if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it origin directory itself? */
|
|
res = FR_INVALID_NAME;
|
|
} else {
|
|
if (dj.obj.attr & AM_DIR) { /* Is it a directory? */
|
|
res = FR_NO_FILE;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (res == FR_OK) {
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
fp->obj.c_scl = dj.obj.sclust; /* Get containing directory info */
|
|
fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
|
|
fp->obj.c_ofs = dj.blk_ofs;
|
|
fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Get object allocation info */
|
|
fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
|
|
fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
|
|
fp->obj.n_frag = 0;
|
|
} else
|
|
#endif
|
|
{
|
|
fp->obj.sclust = ld_clust(fs, dj.dir); /* Get object allocation info */
|
|
fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize);
|
|
}
|
|
#if FF_USE_FASTSEEK
|
|
fp->cltbl = 0; /* Disable fast seek mode */
|
|
#endif
|
|
fp->obj.fs = fs; /* Validate the file object */
|
|
fp->obj.id = fs->id;
|
|
fp->flag = mode; /* Set file access mode */
|
|
fp->err = 0; /* Clear error flag */
|
|
fp->sect = 0; /* Invalidate current data sector */
|
|
fp->fptr = 0; /* Set file pointer top of the file */
|
|
#if !FF_FS_READONLY
|
|
#if !FF_FS_TINY
|
|
mem_set(fp->buf, 0, FF_MAX_SS); /* Clear sector buffer */
|
|
#endif
|
|
if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */
|
|
fp->fptr = fp->obj.objsize; /* Offset to seek */
|
|
bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */
|
|
clst = fp->obj.sclust; /* Follow the cluster chain */
|
|
for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) {
|
|
clst = get_fat(&fp->obj, clst);
|
|
if (clst <= 1) res = FR_INT_ERR;
|
|
if (clst == 0xFFFFFFFF) res = FR_DISK_ERR;
|
|
}
|
|
fp->clust = clst;
|
|
if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */
|
|
if ((sc = clst2sect(fs, clst)) == 0) {
|
|
res = FR_INT_ERR;
|
|
} else {
|
|
fp->sect = sc + (DWORD)(ofs / SS(fs));
|
|
#if !FF_FS_TINY
|
|
if (disk_read(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
FREE_NAMBUF();
|
|
}
|
|
|
|
if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Read File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_read (
|
|
FIL* fp, /* Pointer to the file object */
|
|
void* buff, /* Pointer to data buffer */
|
|
UINT btr, /* Number of bytes to read */
|
|
UINT* br /* Pointer to number of bytes read */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DWORD clst, sect;
|
|
FSIZE_t remain;
|
|
UINT rcnt, cc, csect;
|
|
BYTE *rbuff = (BYTE*)buff;
|
|
|
|
|
|
*br = 0; /* Clear read byte counter */
|
|
res = validate(&fp->obj, &fs); /* Check validity of the file object */
|
|
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
|
|
if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
|
|
remain = fp->obj.objsize - fp->fptr;
|
|
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
|
|
|
|
for ( ; btr; /* Repeat until all data read */
|
|
btr -= rcnt, *br += rcnt, rbuff += rcnt, fp->fptr += rcnt) {
|
|
if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
|
|
csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
|
|
if (csect == 0) { /* On the cluster boundary? */
|
|
if (fp->fptr == 0) { /* On the top of the file? */
|
|
clst = fp->obj.sclust; /* Follow cluster chain from the origin */
|
|
} else { /* Middle or end of the file */
|
|
#if FF_USE_FASTSEEK
|
|
if (fp->cltbl) {
|
|
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
|
|
} else
|
|
#endif
|
|
{
|
|
clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */
|
|
}
|
|
}
|
|
if (clst < 2) ABORT(fs, FR_INT_ERR);
|
|
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
|
|
fp->clust = clst; /* Update current cluster */
|
|
}
|
|
sect = clst2sect(fs, fp->clust); /* Get current sector */
|
|
if (sect == 0) ABORT(fs, FR_INT_ERR);
|
|
sect += csect;
|
|
cc = btr / SS(fs); /* When remaining bytes >= sector size, */
|
|
if (cc > 0) { /* Read maximum contiguous sectors directly */
|
|
if (csect + cc > fs->csize) { /* Clip at cluster boundary */
|
|
cc = fs->csize - csect;
|
|
}
|
|
if (disk_read(fs->pdrv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
|
|
#if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
|
|
#if FF_FS_TINY
|
|
if (fs->wflag && fs->winsect - sect < cc) {
|
|
mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs));
|
|
}
|
|
#else
|
|
if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) {
|
|
mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs));
|
|
}
|
|
#endif
|
|
#endif
|
|
rcnt = SS(fs) * cc; /* Number of bytes transferred */
|
|
continue;
|
|
}
|
|
#if !FF_FS_TINY
|
|
if (fp->sect != sect) { /* Load data sector if not in cache */
|
|
#if !FF_FS_READONLY
|
|
if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
|
|
if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
|
|
fp->flag &= (BYTE)~FA_DIRTY;
|
|
}
|
|
#endif
|
|
if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
|
|
}
|
|
#endif
|
|
fp->sect = sect;
|
|
}
|
|
rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */
|
|
if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */
|
|
#if FF_FS_TINY
|
|
if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
|
|
mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
|
|
#else
|
|
mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
|
|
#endif
|
|
}
|
|
|
|
LEAVE_FF(fs, FR_OK);
|
|
}
|
|
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Write File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_write (
|
|
FIL* fp, /* Pointer to the file object */
|
|
const void* buff, /* Pointer to the data to be written */
|
|
UINT btw, /* Number of bytes to write */
|
|
UINT* bw /* Pointer to number of bytes written */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DWORD clst, sect;
|
|
UINT wcnt, cc, csect;
|
|
const BYTE *wbuff = (const BYTE*)buff;
|
|
|
|
|
|
*bw = 0; /* Clear write byte counter */
|
|
res = validate(&fp->obj, &fs); /* Check validity of the file object */
|
|
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
|
|
if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
|
|
|
|
/* Check fptr wrap-around (file size cannot reach 4 GiB at FAT volume) */
|
|
if ((!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) {
|
|
btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr);
|
|
}
|
|
|
|
for ( ; btw; /* Repeat until all data written */
|
|
btw -= wcnt, *bw += wcnt, wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize) {
|
|
if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
|
|
csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */
|
|
if (csect == 0) { /* On the cluster boundary? */
|
|
if (fp->fptr == 0) { /* On the top of the file? */
|
|
clst = fp->obj.sclust; /* Follow from the origin */
|
|
if (clst == 0) { /* If no cluster is allocated, */
|
|
clst = create_chain(&fp->obj, 0); /* create a new cluster chain */
|
|
}
|
|
} else { /* On the middle or end of the file */
|
|
#if FF_USE_FASTSEEK
|
|
if (fp->cltbl) {
|
|
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
|
|
} else
|
|
#endif
|
|
{
|
|
clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */
|
|
}
|
|
}
|
|
if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
|
|
if (clst == 1) ABORT(fs, FR_INT_ERR);
|
|
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
|
|
fp->clust = clst; /* Update current cluster */
|
|
if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */
|
|
}
|
|
#if FF_FS_TINY
|
|
if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */
|
|
#else
|
|
if (fp->flag & FA_DIRTY) { /* Write-back sector cache */
|
|
if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
|
|
fp->flag &= (BYTE)~FA_DIRTY;
|
|
}
|
|
#endif
|
|
sect = clst2sect(fs, fp->clust); /* Get current sector */
|
|
if (sect == 0) ABORT(fs, FR_INT_ERR);
|
|
sect += csect;
|
|
cc = btw / SS(fs); /* When remaining bytes >= sector size, */
|
|
if (cc > 0) { /* Write maximum contiguous sectors directly */
|
|
if (csect + cc > fs->csize) { /* Clip at cluster boundary */
|
|
cc = fs->csize - csect;
|
|
}
|
|
if (disk_write(fs->pdrv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
|
|
#if FF_FS_MINIMIZE <= 2
|
|
#if FF_FS_TINY
|
|
if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
|
|
mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs));
|
|
fs->wflag = 0;
|
|
}
|
|
#else
|
|
if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
|
|
mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs));
|
|
fp->flag &= (BYTE)~FA_DIRTY;
|
|
}
|
|
#endif
|
|
#endif
|
|
wcnt = SS(fs) * cc; /* Number of bytes transferred */
|
|
continue;
|
|
}
|
|
#if FF_FS_TINY
|
|
if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */
|
|
if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);
|
|
fs->winsect = sect;
|
|
}
|
|
#else
|
|
if (fp->sect != sect && /* Fill sector cache with file data */
|
|
fp->fptr < fp->obj.objsize &&
|
|
disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) {
|
|
ABORT(fs, FR_DISK_ERR);
|
|
}
|
|
#endif
|
|
fp->sect = sect;
|
|
}
|
|
wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */
|
|
if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */
|
|
#if FF_FS_TINY
|
|
if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
|
|
mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
|
|
fs->wflag = 1;
|
|
#else
|
|
mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
|
|
fp->flag |= FA_DIRTY;
|
|
#endif
|
|
}
|
|
|
|
fp->flag |= FA_MODIFIED; /* Set file change flag */
|
|
|
|
LEAVE_FF(fs, FR_OK);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Synchronize the File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_sync (
|
|
FIL* fp /* Pointer to the file object */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DWORD tm;
|
|
BYTE *dir;
|
|
|
|
|
|
res = validate(&fp->obj, &fs); /* Check validity of the file object */
|
|
if (res == FR_OK) {
|
|
if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */
|
|
#if !FF_FS_TINY
|
|
if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */
|
|
if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR);
|
|
fp->flag &= (BYTE)~FA_DIRTY;
|
|
}
|
|
#endif
|
|
/* Update the directory entry */
|
|
tm = GET_FATTIME(); /* Modified time */
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
res = fill_first_frag(&fp->obj); /* Fill first fragment on the FAT if needed */
|
|
if (res == FR_OK) {
|
|
res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
|
|
}
|
|
if (res == FR_OK) {
|
|
DIR dj;
|
|
DEF_NAMBUF
|
|
|
|
INIT_NAMBUF(fs);
|
|
res = load_obj_xdir(&dj, &fp->obj); /* Load directory entry block */
|
|
if (res == FR_OK) {
|
|
fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
|
|
fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation information */
|
|
st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust);
|
|
st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize);
|
|
st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize);
|
|
st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */
|
|
fs->dirbuf[XDIR_ModTime10] = 0;
|
|
st_dword(fs->dirbuf + XDIR_AccTime, 0);
|
|
res = store_xdir(&dj); /* Restore it to the directory */
|
|
if (res == FR_OK) {
|
|
res = sync_fs(fs);
|
|
fp->flag &= (BYTE)~FA_MODIFIED;
|
|
}
|
|
}
|
|
FREE_NAMBUF();
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
res = move_window(fs, fp->dir_sect);
|
|
if (res == FR_OK) {
|
|
dir = fp->dir_ptr;
|
|
dir[DIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
|
|
st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation information */
|
|
st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */
|
|
st_dword(dir + DIR_ModTime, tm); /* Update modified time */
|
|
st_word(dir + DIR_LstAccDate, 0);
|
|
fs->wflag = 1;
|
|
res = sync_fs(fs); /* Restore it to the directory */
|
|
fp->flag &= (BYTE)~FA_MODIFIED;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Close File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_close (
|
|
FIL* fp /* Pointer to the file object to be closed */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
|
|
#if !FF_FS_READONLY
|
|
res = f_sync(fp); /* Flush cached data */
|
|
if (res == FR_OK)
|
|
#endif
|
|
{
|
|
res = validate(&fp->obj, &fs); /* Lock volume */
|
|
if (res == FR_OK) {
|
|
#if FF_FS_LOCK != 0
|
|
res = dec_lock(fp->obj.lockid); /* Decrement file open counter */
|
|
if (res == FR_OK) fp->obj.fs = 0; /* Invalidate file object */
|
|
#else
|
|
fp->obj.fs = 0; /* Invalidate file object */
|
|
#endif
|
|
#if FF_FS_REENTRANT
|
|
unlock_fs(fs, FR_OK); /* Unlock volume */
|
|
#endif
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
#if FF_FS_RPATH >= 1
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Change Current Directory or Current Drive, Get Current Directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
#if FF_VOLUMES >= 2
|
|
FRESULT f_chdrive (
|
|
const TCHAR* path /* Drive number */
|
|
)
|
|
{
|
|
int vol;
|
|
|
|
|
|
/* Get logical drive number */
|
|
vol = get_ldnumber(&path);
|
|
if (vol < 0) return FR_INVALID_DRIVE;
|
|
|
|
CurrVol = (BYTE)vol; /* Set it as current volume */
|
|
|
|
return FR_OK;
|
|
}
|
|
#endif
|
|
|
|
|
|
FRESULT f_chdir (
|
|
const TCHAR* path /* Pointer to the directory path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
FATFS *fs;
|
|
DEF_NAMBUF
|
|
|
|
/* Get logical drive */
|
|
res = find_volume(&path, &fs, 0);
|
|
if (res == FR_OK) {
|
|
dj.obj.fs = fs;
|
|
INIT_NAMBUF(fs);
|
|
res = follow_path(&dj, path); /* Follow the path */
|
|
if (res == FR_OK) { /* Follow completed */
|
|
if (dj.fn[NSFLAG] & NS_NONAME) {
|
|
fs->cdir = dj.obj.sclust; /* It is the start directory itself */
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
fs->cdc_scl = dj.obj.c_scl;
|
|
fs->cdc_size = dj.obj.c_size;
|
|
fs->cdc_ofs = dj.obj.c_ofs;
|
|
}
|
|
#endif
|
|
} else {
|
|
if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */
|
|
fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */
|
|
fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
|
|
fs->cdc_ofs = dj.blk_ofs;
|
|
} else
|
|
#endif
|
|
{
|
|
fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */
|
|
}
|
|
} else {
|
|
res = FR_NO_PATH; /* Reached but a file */
|
|
}
|
|
}
|
|
}
|
|
FREE_NAMBUF();
|
|
if (res == FR_NO_FILE) res = FR_NO_PATH;
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
#if FF_FS_RPATH >= 2
|
|
FRESULT f_getcwd (
|
|
TCHAR* buff, /* Pointer to the directory path */
|
|
UINT len /* Size of path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
FATFS *fs;
|
|
UINT i, n;
|
|
DWORD ccl;
|
|
TCHAR *tp;
|
|
FILINFO fno;
|
|
DEF_NAMBUF
|
|
|
|
|
|
*buff = 0;
|
|
/* Get logical drive */
|
|
res = find_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */
|
|
if (res == FR_OK) {
|
|
dj.obj.fs = fs;
|
|
INIT_NAMBUF(fs);
|
|
i = len; /* Bottom of buffer (directory stack base) */
|
|
if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */
|
|
dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */
|
|
while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
|
|
res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */
|
|
if (res != FR_OK) break;
|
|
res = move_window(fs, dj.sect);
|
|
if (res != FR_OK) break;
|
|
dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */
|
|
res = dir_sdi(&dj, 0);
|
|
if (res != FR_OK) break;
|
|
do { /* Find the entry links to the child directory */
|
|
res = dir_read(&dj, 0);
|
|
if (res != FR_OK) break;
|
|
if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */
|
|
res = dir_next(&dj, 0);
|
|
} while (res == FR_OK);
|
|
if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
|
|
if (res != FR_OK) break;
|
|
get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
|
|
for (n = 0; fno.fname[n]; n++) ;
|
|
if (i < n + 3) {
|
|
res = FR_NOT_ENOUGH_CORE; break;
|
|
}
|
|
while (n) buff[--i] = fno.fname[--n];
|
|
buff[--i] = '/';
|
|
}
|
|
}
|
|
tp = buff;
|
|
if (res == FR_OK) {
|
|
#if FF_VOLUMES >= 2
|
|
*tp++ = '0' + CurrVol; /* Put drive number */
|
|
*tp++ = ':';
|
|
#endif
|
|
if (i == len) { /* Root-directory */
|
|
*tp++ = '/';
|
|
} else { /* Sub-directroy */
|
|
do /* Add stacked path str */
|
|
*tp++ = buff[i++];
|
|
while (i < len);
|
|
}
|
|
}
|
|
*tp = 0;
|
|
FREE_NAMBUF();
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
#endif /* FF_FS_RPATH >= 2 */
|
|
#endif /* FF_FS_RPATH >= 1 */
|
|
|
|
|
|
|
|
#if FF_FS_MINIMIZE <= 2
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Seek File Read/Write Pointer */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_lseek (
|
|
FIL* fp, /* Pointer to the file object */
|
|
FSIZE_t ofs /* File pointer from top of file */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DWORD clst, bcs, nsect;
|
|
FSIZE_t ifptr;
|
|
#if FF_USE_FASTSEEK
|
|
DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
|
|
#endif
|
|
|
|
res = validate(&fp->obj, &fs); /* Check validity of the file object */
|
|
if (res == FR_OK) res = (FRESULT)fp->err;
|
|
#if FF_FS_EXFAT && !FF_FS_READONLY
|
|
if (res == FR_OK && fs->fs_type == FS_EXFAT) {
|
|
res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
|
|
}
|
|
#endif
|
|
if (res != FR_OK) LEAVE_FF(fs, res);
|
|
|
|
#if FF_USE_FASTSEEK
|
|
if (fp->cltbl) { /* Fast seek */
|
|
if (ofs == CREATE_LINKMAP) { /* Create CLMT */
|
|
tbl = fp->cltbl;
|
|
tlen = *tbl++; ulen = 2; /* Given table size and required table size */
|
|
cl = fp->obj.sclust; /* Origin of the chain */
|
|
if (cl != 0) {
|
|
do {
|
|
/* Get a fragment */
|
|
tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
|
|
do {
|
|
pcl = cl; ncl++;
|
|
cl = get_fat(&fp->obj, cl);
|
|
if (cl <= 1) ABORT(fs, FR_INT_ERR);
|
|
if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
|
|
} while (cl == pcl + 1);
|
|
if (ulen <= tlen) { /* Store the length and top of the fragment */
|
|
*tbl++ = ncl; *tbl++ = tcl;
|
|
}
|
|
} while (cl < fs->n_fatent); /* Repeat until end of chain */
|
|
}
|
|
*fp->cltbl = ulen; /* Number of items used */
|
|
if (ulen <= tlen) {
|
|
*tbl = 0; /* Terminate table */
|
|
} else {
|
|
res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
|
|
}
|
|
} else { /* Fast seek */
|
|
if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */
|
|
fp->fptr = ofs; /* Set file pointer */
|
|
if (ofs > 0) {
|
|
fp->clust = clmt_clust(fp, ofs - 1);
|
|
dsc = clst2sect(fs, fp->clust);
|
|
if (dsc == 0) ABORT(fs, FR_INT_ERR);
|
|
dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1);
|
|
if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */
|
|
#if !FF_FS_TINY
|
|
#if !FF_FS_READONLY
|
|
if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
|
|
if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
|
|
fp->flag &= (BYTE)~FA_DIRTY;
|
|
}
|
|
#endif
|
|
if (disk_read(fs->pdrv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */
|
|
#endif
|
|
fp->sect = dsc;
|
|
}
|
|
}
|
|
}
|
|
} else
|
|
#endif
|
|
|
|
/* Normal Seek */
|
|
{
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4 GiB - 1 if at FATxx */
|
|
#endif
|
|
if (ofs > fp->obj.objsize && (FF_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */
|
|
ofs = fp->obj.objsize;
|
|
}
|
|
ifptr = fp->fptr;
|
|
fp->fptr = nsect = 0;
|
|
if (ofs > 0) {
|
|
bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */
|
|
if (ifptr > 0 &&
|
|
(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
|
|
fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */
|
|
ofs -= fp->fptr;
|
|
clst = fp->clust;
|
|
} else { /* When seek to back cluster, */
|
|
clst = fp->obj.sclust; /* start from the first cluster */
|
|
#if !FF_FS_READONLY
|
|
if (clst == 0) { /* If no cluster chain, create a new chain */
|
|
clst = create_chain(&fp->obj, 0);
|
|
if (clst == 1) ABORT(fs, FR_INT_ERR);
|
|
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
|
|
fp->obj.sclust = clst;
|
|
}
|
|
#endif
|
|
fp->clust = clst;
|
|
}
|
|
if (clst != 0) {
|
|
while (ofs > bcs) { /* Cluster following loop */
|
|
ofs -= bcs; fp->fptr += bcs;
|
|
#if !FF_FS_READONLY
|
|
if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
|
|
if (FF_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */
|
|
fp->obj.objsize = fp->fptr;
|
|
fp->flag |= FA_MODIFIED;
|
|
}
|
|
clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */
|
|
if (clst == 0) { /* Clip file size in case of disk full */
|
|
ofs = 0; break;
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */
|
|
}
|
|
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
|
|
if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR);
|
|
fp->clust = clst;
|
|
}
|
|
fp->fptr += ofs;
|
|
if (ofs % SS(fs)) {
|
|
nsect = clst2sect(fs, clst); /* Current sector */
|
|
if (nsect == 0) ABORT(fs, FR_INT_ERR);
|
|
nsect += (DWORD)(ofs / SS(fs));
|
|
}
|
|
}
|
|
}
|
|
if (!FF_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */
|
|
fp->obj.objsize = fp->fptr;
|
|
fp->flag |= FA_MODIFIED;
|
|
}
|
|
if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */
|
|
#if !FF_FS_TINY
|
|
#if !FF_FS_READONLY
|
|
if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
|
|
if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
|
|
fp->flag &= (BYTE)~FA_DIRTY;
|
|
}
|
|
#endif
|
|
if (disk_read(fs->pdrv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
|
|
#endif
|
|
fp->sect = nsect;
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
#if FF_FS_MINIMIZE <= 1
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Create a Directory Object */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_opendir (
|
|
DIR* dp, /* Pointer to directory object to create */
|
|
const TCHAR* path /* Pointer to the directory path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DEF_NAMBUF
|
|
|
|
|
|
if (!dp) return FR_INVALID_OBJECT;
|
|
|
|
/* Get logical drive */
|
|
res = find_volume(&path, &fs, 0);
|
|
if (res == FR_OK) {
|
|
dp->obj.fs = fs;
|
|
INIT_NAMBUF(fs);
|
|
res = follow_path(dp, path); /* Follow the path to the directory */
|
|
if (res == FR_OK) { /* Follow completed */
|
|
if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */
|
|
if (dp->obj.attr & AM_DIR) { /* This object is a sub-directory */
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
dp->obj.c_scl = dp->obj.sclust; /* Get containing directory inforamation */
|
|
dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
|
|
dp->obj.c_ofs = dp->blk_ofs;
|
|
dp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Get object allocation info */
|
|
dp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
|
|
dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
|
|
} else
|
|
#endif
|
|
{
|
|
dp->obj.sclust = ld_clust(fs, dp->dir); /* Get object allocation info */
|
|
}
|
|
} else { /* This object is a file */
|
|
res = FR_NO_PATH;
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
dp->obj.id = fs->id;
|
|
res = dir_sdi(dp, 0); /* Rewind directory */
|
|
#if FF_FS_LOCK != 0
|
|
if (res == FR_OK) {
|
|
if (dp->obj.sclust != 0) {
|
|
dp->obj.lockid = inc_lock(dp, 0); /* Lock the sub directory */
|
|
if (!dp->obj.lockid) res = FR_TOO_MANY_OPEN_FILES;
|
|
} else {
|
|
dp->obj.lockid = 0; /* Root directory need not to be locked */
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
FREE_NAMBUF();
|
|
if (res == FR_NO_FILE) res = FR_NO_PATH;
|
|
}
|
|
if (res != FR_OK) dp->obj.fs = 0; /* Invalidate the directory object if function faild */
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Close Directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_closedir (
|
|
DIR *dp /* Pointer to the directory object to be closed */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
|
|
|
|
res = validate(&dp->obj, &fs); /* Check validity of the file object */
|
|
if (res == FR_OK) {
|
|
#if FF_FS_LOCK != 0
|
|
if (dp->obj.lockid) res = dec_lock(dp->obj.lockid); /* Decrement sub-directory open counter */
|
|
if (res == FR_OK) dp->obj.fs = 0; /* Invalidate directory object */
|
|
#else
|
|
dp->obj.fs = 0; /* Invalidate directory object */
|
|
#endif
|
|
#if FF_FS_REENTRANT
|
|
unlock_fs(fs, FR_OK); /* Unlock volume */
|
|
#endif
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Read Directory Entries in Sequence */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_readdir (
|
|
DIR* dp, /* Pointer to the open directory object */
|
|
FILINFO* fno /* Pointer to file information to return */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DEF_NAMBUF
|
|
|
|
|
|
res = validate(&dp->obj, &fs); /* Check validity of the directory object */
|
|
if (res == FR_OK) {
|
|
if (!fno) {
|
|
res = dir_sdi(dp, 0); /* Rewind the directory object */
|
|
} else {
|
|
INIT_NAMBUF(fs);
|
|
res = dir_read(dp, 0); /* Read an item */
|
|
if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */
|
|
if (res == FR_OK) { /* A valid entry is found */
|
|
get_fileinfo(dp, fno); /* Get the object information */
|
|
res = dir_next(dp, 0); /* Increment index for next */
|
|
if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */
|
|
}
|
|
FREE_NAMBUF();
|
|
}
|
|
}
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
#if FF_USE_FIND
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Find Next File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_findnext (
|
|
DIR* dp, /* Pointer to the open directory object */
|
|
FILINFO* fno /* Pointer to the file information structure */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
|
|
|
|
for (;;) {
|
|
res = f_readdir(dp, fno); /* Get a directory item */
|
|
if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
|
|
if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for the file name */
|
|
#if FF_USE_LFN && FF_USE_FIND == 2
|
|
if (pattern_matching(dp->pat, fno->altname, 0, 0)) break; /* Test for alternative name if exist */
|
|
#endif
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Find First File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_findfirst (
|
|
DIR* dp, /* Pointer to the blank directory object */
|
|
FILINFO* fno, /* Pointer to the file information structure */
|
|
const TCHAR* path, /* Pointer to the directory to open */
|
|
const TCHAR* pattern /* Pointer to the matching pattern */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
|
|
|
|
dp->pat = pattern; /* Save pointer to pattern string */
|
|
res = f_opendir(dp, path); /* Open the target directory */
|
|
if (res == FR_OK) {
|
|
res = f_findnext(dp, fno); /* Find the first item */
|
|
}
|
|
return res;
|
|
}
|
|
|
|
#endif /* FF_USE_FIND */
|
|
|
|
|
|
|
|
#if FF_FS_MINIMIZE == 0
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get File Status */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_stat (
|
|
const TCHAR* path, /* Pointer to the file path */
|
|
FILINFO* fno /* Pointer to file information to return */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
DEF_NAMBUF
|
|
|
|
|
|
/* Get logical drive */
|
|
res = find_volume(&path, &dj.obj.fs, 0);
|
|
if (res == FR_OK) {
|
|
INIT_NAMBUF(dj.obj.fs);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
if (res == FR_OK) { /* Follow completed */
|
|
if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */
|
|
res = FR_INVALID_NAME;
|
|
} else { /* Found an object */
|
|
if (fno) get_fileinfo(&dj, fno);
|
|
}
|
|
}
|
|
FREE_NAMBUF();
|
|
}
|
|
|
|
LEAVE_FF(dj.obj.fs, res);
|
|
}
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get Number of Free Clusters */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_getfree (
|
|
const TCHAR* path, /* Path name of the logical drive number */
|
|
DWORD* nclst, /* Pointer to a variable to return number of free clusters */
|
|
FATFS** fatfs /* Pointer to return pointer to corresponding filesystem object */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DWORD nfree, clst, sect, stat;
|
|
UINT i;
|
|
FFOBJID obj;
|
|
|
|
|
|
/* Get logical drive */
|
|
res = find_volume(&path, &fs, 0);
|
|
if (res == FR_OK) {
|
|
*fatfs = fs; /* Return ptr to the fs object */
|
|
/* If free_clst is valid, return it without full FAT scan */
|
|
if (fs->free_clst <= fs->n_fatent - 2) {
|
|
*nclst = fs->free_clst;
|
|
} else {
|
|
/* Scan FAT to obtain number of free clusters */
|
|
nfree = 0;
|
|
if (fs->fs_type == FS_FAT12) { /* FAT12: Scan bit field FAT entries */
|
|
clst = 2; obj.fs = fs;
|
|
do {
|
|
stat = get_fat(&obj, clst);
|
|
if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
|
|
if (stat == 1) { res = FR_INT_ERR; break; }
|
|
if (stat == 0) nfree++;
|
|
} while (++clst < fs->n_fatent);
|
|
} else {
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan allocation bitmap */
|
|
BYTE bm;
|
|
UINT b;
|
|
|
|
clst = fs->n_fatent - 2; /* Number of clusters */
|
|
sect = fs->database; /* Assuming bitmap starts at cluster 2 */
|
|
i = 0; /* Offset in the sector */
|
|
do { /* Counts numbuer of bits with zero in the bitmap */
|
|
if (i == 0) {
|
|
res = move_window(fs, sect++);
|
|
if (res != FR_OK) break;
|
|
}
|
|
for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) {
|
|
if (!(bm & 1)) nfree++;
|
|
bm >>= 1;
|
|
}
|
|
i = (i + 1) % SS(fs);
|
|
} while (clst);
|
|
} else
|
|
#endif
|
|
{ /* FAT16/32: Scan WORD/DWORD FAT entries */
|
|
clst = fs->n_fatent; /* Number of entries */
|
|
sect = fs->fatbase; /* Top of the FAT */
|
|
i = 0; /* Offset in the sector */
|
|
do { /* Counts numbuer of entries with zero in the FAT */
|
|
if (i == 0) {
|
|
res = move_window(fs, sect++);
|
|
if (res != FR_OK) break;
|
|
}
|
|
if (fs->fs_type == FS_FAT16) {
|
|
if (ld_word(fs->win + i) == 0) nfree++;
|
|
i += 2;
|
|
} else {
|
|
if ((ld_dword(fs->win + i) & 0x0FFFFFFF) == 0) nfree++;
|
|
i += 4;
|
|
}
|
|
i %= SS(fs);
|
|
} while (--clst);
|
|
}
|
|
}
|
|
*nclst = nfree; /* Return the free clusters */
|
|
fs->free_clst = nfree; /* Now free_clst is valid */
|
|
fs->fsi_flag |= 1; /* FAT32: FSInfo is to be updated */
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Truncate File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_truncate (
|
|
FIL* fp /* Pointer to the file object */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DWORD ncl;
|
|
|
|
|
|
res = validate(&fp->obj, &fs); /* Check validity of the file object */
|
|
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
|
|
if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
|
|
|
|
if (fp->fptr < fp->obj.objsize) { /* Process when fptr is not on the eof */
|
|
if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
|
|
res = remove_chain(&fp->obj, fp->obj.sclust, 0);
|
|
fp->obj.sclust = 0;
|
|
} else { /* When truncate a part of the file, remove remaining clusters */
|
|
ncl = get_fat(&fp->obj, fp->clust);
|
|
res = FR_OK;
|
|
if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
|
|
if (ncl == 1) res = FR_INT_ERR;
|
|
if (res == FR_OK && ncl < fs->n_fatent) {
|
|
res = remove_chain(&fp->obj, ncl, fp->clust);
|
|
}
|
|
}
|
|
fp->obj.objsize = fp->fptr; /* Set file size to current read/write point */
|
|
fp->flag |= FA_MODIFIED;
|
|
#if !FF_FS_TINY
|
|
if (res == FR_OK && (fp->flag & FA_DIRTY)) {
|
|
if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) {
|
|
res = FR_DISK_ERR;
|
|
} else {
|
|
fp->flag &= (BYTE)~FA_DIRTY;
|
|
}
|
|
}
|
|
#endif
|
|
if (res != FR_OK) ABORT(fs, res);
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Delete a File/Directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_unlink (
|
|
const TCHAR* path /* Pointer to the file or directory path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj, sdj;
|
|
DWORD dclst = 0;
|
|
FATFS *fs;
|
|
#if FF_FS_EXFAT
|
|
FFOBJID obj;
|
|
#endif
|
|
DEF_NAMBUF
|
|
|
|
|
|
/* Get logical drive */
|
|
res = find_volume(&path, &fs, FA_WRITE);
|
|
if (res == FR_OK) {
|
|
dj.obj.fs = fs;
|
|
INIT_NAMBUF(fs);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) {
|
|
res = FR_INVALID_NAME; /* Cannot remove dot entry */
|
|
}
|
|
#if FF_FS_LOCK != 0
|
|
if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */
|
|
#endif
|
|
if (res == FR_OK) { /* The object is accessible */
|
|
if (dj.fn[NSFLAG] & NS_NONAME) {
|
|
res = FR_INVALID_NAME; /* Cannot remove the origin directory */
|
|
} else {
|
|
if (dj.obj.attr & AM_RDO) {
|
|
res = FR_DENIED; /* Cannot remove R/O object */
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
#if FF_FS_EXFAT
|
|
obj.fs = fs;
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
obj.sclust = dclst = ld_dword(fs->dirbuf + XDIR_FstClus);
|
|
obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
|
|
obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
|
|
} else
|
|
#endif
|
|
{
|
|
dclst = ld_clust(fs, dj.dir);
|
|
}
|
|
if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory? */
|
|
#if FF_FS_RPATH != 0
|
|
if (dclst == fs->cdir) { /* Is it the current directory? */
|
|
res = FR_DENIED;
|
|
} else
|
|
#endif
|
|
{
|
|
sdj.obj.fs = fs; /* Open the sub-directory */
|
|
sdj.obj.sclust = dclst;
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
sdj.obj.objsize = obj.objsize;
|
|
sdj.obj.stat = obj.stat;
|
|
}
|
|
#endif
|
|
res = dir_sdi(&sdj, 0);
|
|
if (res == FR_OK) {
|
|
res = dir_read(&sdj, 0); /* Read an item */
|
|
if (res == FR_OK) res = FR_DENIED; /* Not empty? */
|
|
if (res == FR_NO_FILE) res = FR_OK; /* Empty? */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
res = dir_remove(&dj); /* Remove the directory entry */
|
|
if (res == FR_OK && dclst) { /* Remove the cluster chain if exist */
|
|
#if FF_FS_EXFAT
|
|
res = remove_chain(&obj, dclst, 0);
|
|
#else
|
|
res = remove_chain(&dj.obj, dclst, 0);
|
|
#endif
|
|
}
|
|
if (res == FR_OK) res = sync_fs(fs);
|
|
}
|
|
}
|
|
FREE_NAMBUF();
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Create a Directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_mkdir (
|
|
const TCHAR* path /* Pointer to the directory path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
FATFS *fs;
|
|
BYTE *dir;
|
|
DWORD dcl, pcl, tm;
|
|
DEF_NAMBUF
|
|
|
|
|
|
/* Get logical drive */
|
|
res = find_volume(&path, &fs, FA_WRITE);
|
|
if (res == FR_OK) {
|
|
dj.obj.fs = fs;
|
|
INIT_NAMBUF(fs);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
|
|
if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) {
|
|
res = FR_INVALID_NAME;
|
|
}
|
|
if (res == FR_NO_FILE) { /* Can create a new directory */
|
|
dcl = create_chain(&dj.obj, 0); /* Allocate a cluster for the new directory table */
|
|
dj.obj.objsize = (DWORD)fs->csize * SS(fs);
|
|
res = FR_OK;
|
|
if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
|
|
if (dcl == 1) res = FR_INT_ERR;
|
|
if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
|
|
if (res == FR_OK) res = sync_window(fs); /* Flush FAT */
|
|
tm = GET_FATTIME();
|
|
if (res == FR_OK) { /* Initialize the new directory table */
|
|
res = dir_clear(fs, dcl); /* Clean up the new table */
|
|
if (res == FR_OK && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT)) { /* Create dot entries (FAT only) */
|
|
dir = fs->win;
|
|
mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */
|
|
dir[DIR_Name] = '.';
|
|
dir[DIR_Attr] = AM_DIR;
|
|
st_dword(dir + DIR_ModTime, tm);
|
|
st_clust(fs, dir, dcl);
|
|
mem_cpy(dir + SZDIRE, dir, SZDIRE); /* Create ".." entry */
|
|
dir[SZDIRE + 1] = '.'; pcl = dj.obj.sclust;
|
|
st_clust(fs, dir + SZDIRE, pcl);
|
|
fs->wflag = 1;
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
res = dir_register(&dj); /* Register the object to the directoy */
|
|
}
|
|
if (res == FR_OK) {
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */
|
|
st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */
|
|
st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */
|
|
st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)dj.obj.objsize); /* File size needs to be valid */
|
|
st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)dj.obj.objsize);
|
|
fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag */
|
|
fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */
|
|
res = store_xdir(&dj);
|
|
} else
|
|
#endif
|
|
{
|
|
dir = dj.dir;
|
|
st_dword(dir + DIR_ModTime, tm); /* Created time */
|
|
st_clust(fs, dir, dcl); /* Table start cluster */
|
|
dir[DIR_Attr] = AM_DIR; /* Attribute */
|
|
fs->wflag = 1;
|
|
}
|
|
if (res == FR_OK) {
|
|
res = sync_fs(fs);
|
|
}
|
|
} else {
|
|
remove_chain(&dj.obj, dcl, 0); /* Could not register, remove cluster chain */
|
|
}
|
|
}
|
|
FREE_NAMBUF();
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Rename a File/Directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_rename (
|
|
const TCHAR* path_old, /* Pointer to the object name to be renamed */
|
|
const TCHAR* path_new /* Pointer to the new name */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR djo, djn;
|
|
FATFS *fs;
|
|
BYTE buf[FF_FS_EXFAT ? SZDIRE * 2 : SZDIRE], *dir;
|
|
DWORD dw;
|
|
DEF_NAMBUF
|
|
|
|
|
|
get_ldnumber(&path_new); /* Snip the drive number of new name off */
|
|
res = find_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */
|
|
if (res == FR_OK) {
|
|
djo.obj.fs = fs;
|
|
INIT_NAMBUF(fs);
|
|
res = follow_path(&djo, path_old); /* Check old object */
|
|
if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */
|
|
#if FF_FS_LOCK != 0
|
|
if (res == FR_OK) {
|
|
res = chk_lock(&djo, 2);
|
|
}
|
|
#endif
|
|
if (res == FR_OK) { /* Object to be renamed is found */
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* At exFAT volume */
|
|
BYTE nf, nn;
|
|
WORD nh;
|
|
|
|
mem_cpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */
|
|
mem_cpy(&djn, &djo, sizeof djo);
|
|
res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
|
|
if (res == FR_OK) { /* Is new name already in use by any other object? */
|
|
res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
|
|
}
|
|
if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
|
|
res = dir_register(&djn); /* Register the new entry */
|
|
if (res == FR_OK) {
|
|
nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName];
|
|
nh = ld_word(fs->dirbuf + XDIR_NameHash);
|
|
mem_cpy(fs->dirbuf, buf, SZDIRE * 2); /* Restore 85+C0 entry */
|
|
fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn;
|
|
st_word(fs->dirbuf + XDIR_NameHash, nh);
|
|
if (!(fs->dirbuf[XDIR_Attr] & AM_DIR)) fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
|
|
/* Start of critical section where an interruption can cause a cross-link */
|
|
res = store_xdir(&djn);
|
|
}
|
|
}
|
|
} else
|
|
#endif
|
|
{ /* At FAT/FAT32 volume */
|
|
mem_cpy(buf, djo.dir, SZDIRE); /* Save directory entry of the object */
|
|
mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
|
|
res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
|
|
if (res == FR_OK) { /* Is new name already in use by any other object? */
|
|
res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
|
|
}
|
|
if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
|
|
res = dir_register(&djn); /* Register the new entry */
|
|
if (res == FR_OK) {
|
|
dir = djn.dir; /* Copy directory entry of the object except name */
|
|
mem_cpy(dir + 13, buf + 13, SZDIRE - 13);
|
|
dir[DIR_Attr] = buf[DIR_Attr];
|
|
if (!(dir[DIR_Attr] & AM_DIR)) dir[DIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
|
|
fs->wflag = 1;
|
|
if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */
|
|
dw = clst2sect(fs, ld_clust(fs, dir));
|
|
if (dw == 0) {
|
|
res = FR_INT_ERR;
|
|
} else {
|
|
/* Start of critical section where an interruption can cause a cross-link */
|
|
res = move_window(fs, dw);
|
|
dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */
|
|
if (res == FR_OK && dir[1] == '.') {
|
|
st_clust(fs, dir, djn.obj.sclust);
|
|
fs->wflag = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (res == FR_OK) {
|
|
res = dir_remove(&djo); /* Remove old entry */
|
|
if (res == FR_OK) {
|
|
res = sync_fs(fs);
|
|
}
|
|
}
|
|
/* End of the critical section */
|
|
}
|
|
FREE_NAMBUF();
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
#endif /* FF_FS_MINIMIZE == 0 */
|
|
#endif /* FF_FS_MINIMIZE <= 1 */
|
|
#endif /* FF_FS_MINIMIZE <= 2 */
|
|
|
|
|
|
|
|
#if FF_USE_CHMOD && !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Change Attribute */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_chmod (
|
|
const TCHAR* path, /* Pointer to the file path */
|
|
BYTE attr, /* Attribute bits */
|
|
BYTE mask /* Attribute mask to change */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
FATFS *fs;
|
|
DEF_NAMBUF
|
|
|
|
|
|
res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */
|
|
if (res == FR_OK) {
|
|
dj.obj.fs = fs;
|
|
INIT_NAMBUF(fs);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
|
|
if (res == FR_OK) {
|
|
mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */
|
|
res = store_xdir(&dj);
|
|
} else
|
|
#endif
|
|
{
|
|
dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
|
|
fs->wflag = 1;
|
|
}
|
|
if (res == FR_OK) {
|
|
res = sync_fs(fs);
|
|
}
|
|
}
|
|
FREE_NAMBUF();
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Change Timestamp */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_utime (
|
|
const TCHAR* path, /* Pointer to the file/directory name */
|
|
const FILINFO* fno /* Pointer to the timestamp to be set */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
FATFS *fs;
|
|
DEF_NAMBUF
|
|
|
|
|
|
res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */
|
|
if (res == FR_OK) {
|
|
dj.obj.fs = fs;
|
|
INIT_NAMBUF(fs);
|
|
res = follow_path(&dj, path); /* Follow the file path */
|
|
if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
|
|
if (res == FR_OK) {
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
|
|
res = store_xdir(&dj);
|
|
} else
|
|
#endif
|
|
{
|
|
st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
|
|
fs->wflag = 1;
|
|
}
|
|
if (res == FR_OK) {
|
|
res = sync_fs(fs);
|
|
}
|
|
}
|
|
FREE_NAMBUF();
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
#endif /* FF_USE_CHMOD && !FF_FS_READONLY */
|
|
|
|
|
|
|
|
#if FF_USE_LABEL
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get Volume Label */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_getlabel (
|
|
const TCHAR* path, /* Path name of the logical drive number */
|
|
TCHAR* label, /* Pointer to a buffer to store the volume label */
|
|
DWORD* vsn /* Pointer to a variable to store the volume serial number */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
FATFS *fs;
|
|
UINT si, di;
|
|
#if (FF_LFN_UNICODE && FF_USE_LFN) || FF_FS_EXFAT
|
|
WCHAR w;
|
|
#endif
|
|
|
|
/* Get logical drive */
|
|
res = find_volume(&path, &fs, 0);
|
|
|
|
/* Get volume label */
|
|
if (res == FR_OK && label) {
|
|
dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
|
|
res = dir_sdi(&dj, 0);
|
|
if (res == FR_OK) {
|
|
res = dir_read(&dj, 1); /* Find a volume label entry */
|
|
if (res == FR_OK) {
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
for (si = di = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */
|
|
w = ld_word(dj.dir + XDIR_Label + si * 2);
|
|
#if !FF_LFN_UNICODE /* ANSI/OEM API */
|
|
w = ff_uni2oem(w, CODEPAGE); /* Unicode -> OEM */
|
|
if (w == 0) w = '?'; /* Replace wrong char with '?' */
|
|
if (w >= 0x100) label[di++] = (char)(w >> 8);
|
|
#endif
|
|
label[di++] = (TCHAR)w;
|
|
}
|
|
label[di] = 0;
|
|
} else
|
|
#endif
|
|
{
|
|
si = di = 0; /* Extract volume label from AM_VOL entry with code comversion */
|
|
do {
|
|
#if FF_LFN_UNICODE && FF_USE_LFN /* Unicode API */
|
|
w = (si < 11) ? dj.dir[si++] : ' ';
|
|
if (dbc_1st((BYTE)w) && si < 11 && dbc_2nd(dj.dir[si])) {
|
|
w = w << 8 | dj.dir[si++];
|
|
}
|
|
label[di++] = ff_oem2uni(w, CODEPAGE); /* OEM -> Unicode */
|
|
#else /* ANSI/OEM API */
|
|
label[di++] = dj.dir[si++];
|
|
#endif
|
|
} while (di < 11);
|
|
do { /* Truncate trailing spaces */
|
|
label[di] = 0;
|
|
if (di == 0) break;
|
|
} while (label[--di] == ' ');
|
|
}
|
|
}
|
|
}
|
|
if (res == FR_NO_FILE) { /* No label entry and return nul string */
|
|
label[0] = 0;
|
|
res = FR_OK;
|
|
}
|
|
}
|
|
|
|
/* Get volume serial number */
|
|
if (res == FR_OK && vsn) {
|
|
res = move_window(fs, fs->volbase);
|
|
if (res == FR_OK) {
|
|
switch (fs->fs_type) {
|
|
case FS_EXFAT:
|
|
di = BPB_VolIDEx; break;
|
|
|
|
case FS_FAT32:
|
|
di = BS_VolID32; break;
|
|
|
|
default:
|
|
di = BS_VolID;
|
|
}
|
|
*vsn = ld_dword(fs->win + di);
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Set Volume Label */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_setlabel (
|
|
const TCHAR* label /* Pointer to the volume label to set */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
FATFS *fs;
|
|
BYTE dirvn[22];
|
|
UINT i, j, slen;
|
|
WCHAR w;
|
|
static const char badchr[] = "\"*+,.:;<=>\?[]|\x7F";
|
|
|
|
|
|
/* Get logical drive */
|
|
res = find_volume(&label, &fs, FA_WRITE);
|
|
if (res != FR_OK) LEAVE_FF(fs, res);
|
|
dj.obj.fs = fs;
|
|
|
|
/* Get length of given volume label */
|
|
for (slen = 0; (UINT)label[slen] >= ' '; slen++) ; /* Get name length */
|
|
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
|
|
for (i = j = 0; i < slen; ) { /* Create volume label in directory form */
|
|
w = label[i++];
|
|
#if !FF_LFN_UNICODE /* ANSI/OEM API */
|
|
if (dbc_1st((BYTE)w)) {
|
|
w = (i < slen && dbc_2nd((BYTE)label[i])) ? w << 8 | (BYTE)label[i++] : 0;
|
|
}
|
|
w = ff_oem2uni(w, CODEPAGE);
|
|
#endif
|
|
if (w == 0 || chk_chr(badchr, w) || j == 22) { /* Check validity check validity of the volume label */
|
|
LEAVE_FF(fs, FR_INVALID_NAME);
|
|
}
|
|
st_word(dirvn + j, w); j += 2;
|
|
}
|
|
slen = j;
|
|
} else
|
|
#endif
|
|
{ /* On the FAT/FAT32 volume */
|
|
for ( ; slen && label[slen - 1] == ' '; slen--) ; /* Remove trailing spaces */
|
|
if (slen != 0) { /* Is there a volume label to be set? */
|
|
dirvn[0] = 0; i = j = 0; /* Create volume label in directory form */
|
|
do {
|
|
#if FF_LFN_UNICODE && FF_USE_LFN /* Unicode API */
|
|
w = ff_uni2oem(ff_wtoupper(label[i++]), CODEPAGE);
|
|
#else /* ANSI/OEM API */
|
|
w = (BYTE)label[i++];
|
|
if (dbc_1st((BYTE)w)) {
|
|
w = (j < 10 && i < slen && dbc_2nd((BYTE)label[i])) ? w << 8 | (BYTE)label[i++] : 0;
|
|
}
|
|
#if FF_USE_LFN
|
|
w = ff_uni2oem(ff_wtoupper(ff_oem2uni(w, CODEPAGE)), CODEPAGE);
|
|
#else
|
|
if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */
|
|
#if FF_CODE_PAGE == 0
|
|
if (ExCvt && w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
|
|
#elif FF_CODE_PAGE < 900
|
|
if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
|
|
#endif
|
|
#endif
|
|
#endif
|
|
if (w == 0 || chk_chr(badchr, w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */
|
|
LEAVE_FF(fs, FR_INVALID_NAME);
|
|
}
|
|
if (w >= 0x100) dirvn[j++] = (BYTE)(w >> 8);
|
|
dirvn[j++] = (BYTE)w;
|
|
} while (i < slen);
|
|
while (j < 11) dirvn[j++] = ' '; /* Fill remaining name field */
|
|
if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
|
|
}
|
|
}
|
|
|
|
/* Set volume label */
|
|
dj.obj.sclust = 0; /* Open root directory */
|
|
res = dir_sdi(&dj, 0);
|
|
if (res == FR_OK) {
|
|
res = dir_read(&dj, 1); /* Get volume label entry */
|
|
if (res == FR_OK) {
|
|
if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
|
|
dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2); /* Change the volume label */
|
|
mem_cpy(dj.dir + XDIR_Label, dirvn, slen);
|
|
} else {
|
|
if (slen != 0) {
|
|
mem_cpy(dj.dir, dirvn, 11); /* Change the volume label */
|
|
} else {
|
|
dj.dir[DIR_Name] = DDEM; /* Remove the volume label */
|
|
}
|
|
}
|
|
fs->wflag = 1;
|
|
res = sync_fs(fs);
|
|
} else { /* No volume label entry or an error */
|
|
if (res == FR_NO_FILE) {
|
|
res = FR_OK;
|
|
if (slen != 0) { /* Create a volume label entry */
|
|
res = dir_alloc(&dj, 1); /* Allocate an entry */
|
|
if (res == FR_OK) {
|
|
mem_set(dj.dir, 0, SZDIRE); /* Clear the entry */
|
|
if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
|
|
dj.dir[XDIR_Type] = 0x83; /* Create 83 entry */
|
|
dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2);
|
|
mem_cpy(dj.dir + XDIR_Label, dirvn, slen);
|
|
} else {
|
|
dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */
|
|
mem_cpy(dj.dir, dirvn, 11);
|
|
}
|
|
fs->wflag = 1;
|
|
res = sync_fs(fs);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
#endif /* FF_USE_LABEL */
|
|
|
|
|
|
|
|
#if FF_USE_EXPAND && !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Allocate a Contiguous Blocks to the File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_expand (
|
|
FIL* fp, /* Pointer to the file object */
|
|
FSIZE_t fsz, /* File size to be expanded to */
|
|
BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DWORD n, clst, stcl, scl, ncl, tcl, lclst;
|
|
|
|
|
|
res = validate(&fp->obj, &fs); /* Check validity of the file object */
|
|
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
|
|
if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */
|
|
#endif
|
|
n = (DWORD)fs->csize * SS(fs); /* Cluster size */
|
|
tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */
|
|
stcl = fs->last_clst; lclst = 0;
|
|
if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2;
|
|
|
|
#if FF_FS_EXFAT
|
|
if (fs->fs_type == FS_EXFAT) {
|
|
scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */
|
|
if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */
|
|
if (scl == 0xFFFFFFFF) res = FR_DISK_ERR;
|
|
if (res == FR_OK) { /* A contiguous free area is found */
|
|
if (opt) { /* Allocate it now */
|
|
res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */
|
|
lclst = scl + tcl - 1;
|
|
} else { /* Set it as suggested point for next allocation */
|
|
lclst = scl - 1;
|
|
}
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
scl = clst = stcl; ncl = 0;
|
|
for (;;) { /* Find a contiguous cluster block */
|
|
n = get_fat(&fp->obj, clst);
|
|
if (++clst >= fs->n_fatent) clst = 2;
|
|
if (n == 1) { res = FR_INT_ERR; break; }
|
|
if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
|
|
if (n == 0) { /* Is it a free cluster? */
|
|
if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */
|
|
} else {
|
|
scl = clst; ncl = 0; /* Not a free cluster */
|
|
}
|
|
if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */
|
|
}
|
|
if (res == FR_OK) { /* A contiguous free area is found */
|
|
if (opt) { /* Allocate it now */
|
|
for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */
|
|
res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1);
|
|
if (res != FR_OK) break;
|
|
lclst = clst;
|
|
}
|
|
} else { /* Set it as suggested point for next allocation */
|
|
lclst = scl - 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (res == FR_OK) {
|
|
fs->last_clst = lclst; /* Set suggested start cluster to start next */
|
|
if (opt) { /* Is it allocated now? */
|
|
fp->obj.sclust = scl; /* Update object allocation information */
|
|
fp->obj.objsize = fsz;
|
|
if (FF_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */
|
|
fp->flag |= FA_MODIFIED;
|
|
if (fs->free_clst <= fs->n_fatent - 2) { /* Update FSINFO */
|
|
fs->free_clst -= tcl;
|
|
fs->fsi_flag |= 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
LEAVE_FF(fs, res);
|
|
}
|
|
|
|
#endif /* FF_USE_EXPAND && !FF_FS_READONLY */
|
|
|
|
|
|
|
|
#if FF_USE_FORWARD
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Forward Data to the Stream Directly */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_forward (
|
|
FIL* fp, /* Pointer to the file object */
|
|
UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
|
|
UINT btf, /* Number of bytes to forward */
|
|
UINT* bf /* Pointer to number of bytes forwarded */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
FATFS *fs;
|
|
DWORD clst, sect;
|
|
FSIZE_t remain;
|
|
UINT rcnt, csect;
|
|
BYTE *dbuf;
|
|
|
|
|
|
*bf = 0; /* Clear transfer byte counter */
|
|
res = validate(&fp->obj, &fs); /* Check validity of the file object */
|
|
if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
|
|
if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
|
|
|
|
remain = fp->obj.objsize - fp->fptr;
|
|
if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
|
|
|
|
for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream goes busy */
|
|
fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
|
|
csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
|
|
if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
|
|
if (csect == 0) { /* On the cluster boundary? */
|
|
clst = (fp->fptr == 0) ? /* On the top of the file? */
|
|
fp->obj.sclust : get_fat(&fp->obj, fp->clust);
|
|
if (clst <= 1) ABORT(fs, FR_INT_ERR);
|
|
if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
|
|
fp->clust = clst; /* Update current cluster */
|
|
}
|
|
}
|
|
sect = clst2sect(fs, fp->clust); /* Get current data sector */
|
|
if (sect == 0) ABORT(fs, FR_INT_ERR);
|
|
sect += csect;
|
|
#if FF_FS_TINY
|
|
if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */
|
|
dbuf = fs->win;
|
|
#else
|
|
if (fp->sect != sect) { /* Fill sector cache with file data */
|
|
#if !FF_FS_READONLY
|
|
if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
|
|
if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
|
|
fp->flag &= (BYTE)~FA_DIRTY;
|
|
}
|
|
#endif
|
|
if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
|
|
}
|
|
dbuf = fp->buf;
|
|
#endif
|
|
fp->sect = sect;
|
|
rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */
|
|
if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */
|
|
rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */
|
|
if (rcnt == 0) ABORT(fs, FR_INT_ERR);
|
|
}
|
|
|
|
LEAVE_FF(fs, FR_OK);
|
|
}
|
|
#endif /* FF_USE_FORWARD */
|
|
|
|
|
|
|
|
#if FF_USE_MKFS && !FF_FS_READONLY
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Create an FAT/exFAT volume */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_mkfs (
|
|
const TCHAR* path, /* Logical drive number */
|
|
BYTE opt, /* Format option */
|
|
DWORD au, /* Size of allocation unit (cluster) [byte] */
|
|
void* work, /* Pointer to working buffer */
|
|
UINT len /* Size of working buffer */
|
|
)
|
|
{
|
|
const UINT n_fats = 1; /* Number of FATs for FAT/FAT32 volume (1 or 2) */
|
|
const UINT n_rootdir = 512; /* Number of root directory entries for FAT volume */
|
|
static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT volume (4Ks unit) */
|
|
static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */
|
|
BYTE fmt, sys, *buf, *pte, pdrv, part;
|
|
WORD ss;
|
|
DWORD szb_buf, sz_buf, sz_blk, n_clst, pau, sect, nsect, n;
|
|
DWORD b_vol, b_fat, b_data; /* Base LBA for volume, fat, data */
|
|
DWORD sz_vol, sz_rsv, sz_fat, sz_dir; /* Size for volume, fat, dir, data */
|
|
UINT i;
|
|
int vol;
|
|
DSTATUS stat;
|
|
#if FF_USE_TRIM || FF_FS_EXFAT
|
|
DWORD tbl[3];
|
|
#endif
|
|
|
|
|
|
/* Check mounted drive and clear work area */
|
|
vol = get_ldnumber(&path); /* Get target logical drive */
|
|
if (vol < 0) return FR_INVALID_DRIVE;
|
|
if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear the volume */
|
|
pdrv = LD2PD(vol); /* Physical drive */
|
|
part = LD2PT(vol); /* Partition (0:create as new, 1-4:get from partition table) */
|
|
|
|
/* Check physical drive status */
|
|
stat = disk_initialize(pdrv);
|
|
if (stat & STA_NOINIT) return FR_NOT_READY;
|
|
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
|
|
if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk) != RES_OK || !sz_blk || sz_blk > 32768 || (sz_blk & (sz_blk - 1))) sz_blk = 1; /* Erase block to align data area */
|
|
#if FF_MAX_SS != FF_MIN_SS /* Get sector size of the medium if variable sector size cfg. */
|
|
if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;
|
|
if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
|
|
#else
|
|
ss = FF_MAX_SS;
|
|
#endif
|
|
if ((au != 0 && au < ss) || au > 0x1000000 || (au & (au - 1))) return FR_INVALID_PARAMETER; /* Check if au is valid */
|
|
au /= ss; /* Cluster size in unit of sector */
|
|
|
|
/* Get working buffer */
|
|
buf = (BYTE*)work; /* Working buffer */
|
|
sz_buf = len / ss; /* Size of working buffer (sector) */
|
|
szb_buf = sz_buf * ss; /* Size of working buffer (byte) */
|
|
if (szb_buf == 0) return FR_MKFS_ABORTED;
|
|
|
|
/* Determine where the volume to be located (b_vol, sz_vol) */
|
|
if (FF_MULTI_PARTITION && part != 0) {
|
|
/* Get partition information from partition table in the MBR */
|
|
if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Load MBR */
|
|
if (ld_word(buf + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; /* Check if MBR is valid */
|
|
pte = buf + (MBR_Table + (part - 1) * SZ_PTE);
|
|
if (!pte[PTE_System]) return FR_MKFS_ABORTED; /* No partition? */
|
|
b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */
|
|
sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */
|
|
} else {
|
|
/* Create a single-partition in this function */
|
|
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) return FR_DISK_ERR;
|
|
b_vol = (opt & FM_SFD) ? 0 : 63; /* Volume start sector */
|
|
if (sz_vol < b_vol) return FR_MKFS_ABORTED;
|
|
sz_vol -= b_vol; /* Volume size */
|
|
}
|
|
if (sz_vol < 128) return FR_MKFS_ABORTED; /* Check if volume size is >=128s */
|
|
|
|
/* Pre-determine the FAT type */
|
|
do {
|
|
if (FF_FS_EXFAT && (opt & FM_EXFAT)) { /* exFAT possible? */
|
|
if ((opt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || au > 128) { /* exFAT only, vol >= 64Ms or au > 128s ? */
|
|
fmt = FS_EXFAT; break;
|
|
}
|
|
}
|
|
if (au > 128) return FR_INVALID_PARAMETER; /* Too large au for FAT/FAT32 */
|
|
if (opt & FM_FAT32) { /* FAT32 possible? */
|
|
if ((opt & FM_ANY) == FM_FAT32 || !(opt & FM_FAT)) { /* FAT32 only or no-FAT? */
|
|
fmt = FS_FAT32; break;
|
|
}
|
|
}
|
|
if (!(opt & FM_FAT)) return FR_INVALID_PARAMETER; /* no-FAT? */
|
|
fmt = FS_FAT16;
|
|
} while (0);
|
|
|
|
#if FF_FS_EXFAT
|
|
if (fmt == FS_EXFAT) { /* Create an exFAT volume */
|
|
DWORD szb_bit, szb_case, sum, nb, cl;
|
|
WCHAR ch, si;
|
|
UINT j, st;
|
|
BYTE b;
|
|
|
|
if (sz_vol < 0x1000) return FR_MKFS_ABORTED; /* Too small volume? */
|
|
#if FF_USE_TRIM
|
|
tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area may be erased */
|
|
disk_ioctl(pdrv, CTRL_TRIM, tbl);
|
|
#endif
|
|
/* Determine FAT location, data location and number of clusters */
|
|
if (au == 0) { /* au auto-selection */
|
|
au = 8;
|
|
if (sz_vol >= 0x80000) au = 64; /* >= 512Ks */
|
|
if (sz_vol >= 0x4000000) au = 256; /* >= 64Ms */
|
|
}
|
|
b_fat = b_vol + 32; /* FAT start at offset 32 */
|
|
sz_fat = ((sz_vol / au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */
|
|
b_data = (b_fat + sz_fat + sz_blk - 1) & ~(sz_blk - 1); /* Align data area to the erase block boundary */
|
|
if (b_data >= sz_vol / 2) return FR_MKFS_ABORTED; /* Too small volume? */
|
|
n_clst = (sz_vol - (b_data - b_vol)) / au; /* Number of clusters */
|
|
if (n_clst <16) return FR_MKFS_ABORTED; /* Too few clusters? */
|
|
if (n_clst > MAX_EXFAT) return FR_MKFS_ABORTED; /* Too many clusters? */
|
|
|
|
szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */
|
|
tbl[0] = (szb_bit + au * ss - 1) / (au * ss); /* Number of allocation bitmap clusters */
|
|
|
|
/* Create a compressed up-case table */
|
|
sect = b_data + au * tbl[0]; /* Table start sector */
|
|
sum = 0; /* Table checksum to be stored in the 82 entry */
|
|
st = si = i = j = szb_case = 0;
|
|
do {
|
|
switch (st) {
|
|
case 0:
|
|
ch = ff_wtoupper(si); /* Get an up-case char */
|
|
if (ch != si) {
|
|
si++; break; /* Store the up-case char if exist */
|
|
}
|
|
for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */
|
|
if (j >= 128) {
|
|
ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 */
|
|
}
|
|
st = 1; /* Do not compress short run */
|
|
/* go to next case */
|
|
case 1:
|
|
ch = si++; /* Fill the short run */
|
|
if (--j == 0) st = 0;
|
|
break;
|
|
|
|
default:
|
|
ch = (WCHAR)j; si += j; /* Number of chars to skip */
|
|
st = 0;
|
|
}
|
|
sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */
|
|
sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum);
|
|
i += 2; szb_case += 2;
|
|
if (si == 0|| i == szb_buf) { /* Write buffered data when buffer full or end of process */
|
|
n = (i + ss - 1) / ss;
|
|
if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
|
|
sect += n; i = 0;
|
|
}
|
|
} while (si);
|
|
tbl[1] = (szb_case + au * ss - 1) / (au * ss); /* Number of up-case table clusters */
|
|
tbl[2] = 1; /* Number of root dir clusters */
|
|
|
|
/* Initialize the allocation bitmap */
|
|
sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of sectors */
|
|
nb = tbl[0] + tbl[1] + tbl[2]; /* Number of clusters in-use by system */
|
|
do {
|
|
mem_set(buf, 0, szb_buf);
|
|
for (i = 0; nb >= 8 && i < szb_buf; buf[i++] = 0xFF, nb -= 8) ;
|
|
for (b = 1; nb != 0 && i < szb_buf; buf[i] |= b, b <<= 1, nb--) ;
|
|
n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
|
|
if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
|
|
sect += n; nsect -= n;
|
|
} while (nsect);
|
|
|
|
/* Initialize the FAT */
|
|
sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */
|
|
j = nb = cl = 0;
|
|
do {
|
|
mem_set(buf, 0, szb_buf); i = 0; /* Clear work area and reset write index */
|
|
if (cl == 0) { /* Set entry 0 and 1 */
|
|
st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++;
|
|
st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++;
|
|
}
|
|
do { /* Create chains of bitmap, up-case and root dir */
|
|
while (nb != 0 && i < szb_buf) { /* Create a chain */
|
|
st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF);
|
|
i += 4; cl++; nb--;
|
|
}
|
|
if (nb == 0 && j < 3) nb = tbl[j++]; /* Next chain */
|
|
} while (nb != 0 && i < szb_buf);
|
|
n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
|
|
if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
|
|
sect += n; nsect -= n;
|
|
} while (nsect);
|
|
|
|
/* Initialize the root directory */
|
|
mem_set(buf, 0, szb_buf);
|
|
buf[SZDIRE * 0 + 0] = 0x83; /* 83 entry (volume label) */
|
|
buf[SZDIRE * 1 + 0] = 0x81; /* 81 entry (allocation bitmap) */
|
|
st_dword(buf + SZDIRE * 1 + 20, 2);
|
|
st_dword(buf + SZDIRE * 1 + 24, szb_bit);
|
|
buf[SZDIRE * 2 + 0] = 0x82; /* 82 entry (up-case table) */
|
|
st_dword(buf + SZDIRE * 2 + 4, sum);
|
|
st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]);
|
|
st_dword(buf + SZDIRE * 2 + 24, szb_case);
|
|
sect = b_data + au * (tbl[0] + tbl[1]); nsect = au; /* Start of the root directory and number of sectors */
|
|
do { /* Fill root directory sectors */
|
|
n = (nsect > sz_buf) ? sz_buf : nsect;
|
|
if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
|
|
mem_set(buf, 0, ss);
|
|
sect += n; nsect -= n;
|
|
} while (nsect);
|
|
|
|
/* Create two set of the exFAT VBR blocks */
|
|
sect = b_vol;
|
|
for (n = 0; n < 2; n++) {
|
|
/* Main record (+0) */
|
|
mem_set(buf, 0, ss);
|
|
mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */
|
|
st_dword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */
|
|
st_dword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */
|
|
st_dword(buf + BPB_FatOfsEx, b_fat - b_vol); /* FAT offset [sector] */
|
|
st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */
|
|
st_dword(buf + BPB_DataOfsEx, b_data - b_vol); /* Data offset [sector] */
|
|
st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */
|
|
st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]); /* Root dir cluster # */
|
|
st_dword(buf + BPB_VolIDEx, GET_FATTIME()); /* VSN */
|
|
st_word(buf + BPB_FSVerEx, 0x100); /* Filesystem version (1.00) */
|
|
for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */
|
|
for (buf[BPB_SecPerClusEx] = 0, i = au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */
|
|
buf[BPB_NumFATsEx] = 1; /* Number of FATs */
|
|
buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */
|
|
st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */
|
|
st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */
|
|
for (i = sum = 0; i < ss; i++) { /* VBR checksum */
|
|
if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum);
|
|
}
|
|
if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
|
|
/* Extended bootstrap record (+1..+8) */
|
|
mem_set(buf, 0, ss);
|
|
st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */
|
|
for (j = 1; j < 9; j++) {
|
|
for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
|
|
if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
|
|
}
|
|
/* OEM/Reserved record (+9..+10) */
|
|
mem_set(buf, 0, ss);
|
|
for ( ; j < 11; j++) {
|
|
for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
|
|
if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
|
|
}
|
|
/* Sum record (+11) */
|
|
for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */
|
|
if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
|
|
}
|
|
|
|
} else
|
|
#endif /* FF_FS_EXFAT */
|
|
{ /* Create an FAT/FAT32 volume */
|
|
do {
|
|
pau = au;
|
|
/* Pre-determine number of clusters and FAT sub-type */
|
|
if (fmt == FS_FAT32) { /* FAT32 volume */
|
|
if (pau == 0) { /* au auto-selection */
|
|
n = sz_vol / 0x20000; /* Volume size in unit of 128KS */
|
|
for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */
|
|
}
|
|
n_clst = sz_vol / pau; /* Number of clusters */
|
|
sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */
|
|
sz_rsv = 32; /* Number of reserved sectors */
|
|
sz_dir = 0; /* No static directory */
|
|
if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) return FR_MKFS_ABORTED;
|
|
} else { /* FAT volume */
|
|
if (pau == 0) { /* au auto-selection */
|
|
n = sz_vol / 0x1000; /* Volume size in unit of 4KS */
|
|
for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */
|
|
}
|
|
n_clst = sz_vol / pau;
|
|
if (n_clst > MAX_FAT12) {
|
|
n = n_clst * 2 + 4; /* FAT size [byte] */
|
|
} else {
|
|
fmt = FS_FAT12;
|
|
n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */
|
|
}
|
|
sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */
|
|
sz_rsv = 1; /* Number of reserved sectors */
|
|
sz_dir = (DWORD)n_rootdir * SZDIRE / ss; /* Rootdir size [sector] */
|
|
}
|
|
b_fat = b_vol + sz_rsv; /* FAT base */
|
|
b_data = b_fat + sz_fat * n_fats + sz_dir; /* Data base */
|
|
|
|
/* Align data base to erase block boundary (for flash memory media) */
|
|
n = ((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data; /* Next nearest erase block from current data base */
|
|
if (fmt == FS_FAT32) { /* FAT32: Move FAT base */
|
|
sz_rsv += n; b_fat += n;
|
|
} else { /* FAT: Expand FAT size */
|
|
sz_fat += n / n_fats;
|
|
}
|
|
|
|
/* Determine number of clusters and final check of validity of the FAT sub-type */
|
|
if (sz_vol < b_data + pau * 16 - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
|
|
n_clst = (sz_vol - sz_rsv - sz_fat * n_fats - sz_dir) / pau;
|
|
if (fmt == FS_FAT32) {
|
|
if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32 */
|
|
if (au == 0 && (au = pau / 2) != 0) continue; /* Adjust cluster size and retry */
|
|
return FR_MKFS_ABORTED;
|
|
}
|
|
}
|
|
if (fmt == FS_FAT16) {
|
|
if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */
|
|
if (au == 0 && (pau * 2) <= 64) {
|
|
au = pau * 2; continue; /* Adjust cluster size and retry */
|
|
}
|
|
if ((opt & FM_FAT32)) {
|
|
fmt = FS_FAT32; continue; /* Switch type to FAT32 and retry */
|
|
}
|
|
if (au == 0 && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
|
|
return FR_MKFS_ABORTED;
|
|
}
|
|
if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */
|
|
if (au == 0 && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
|
|
return FR_MKFS_ABORTED;
|
|
}
|
|
}
|
|
if (fmt == FS_FAT12 && n_clst > MAX_FAT12) return FR_MKFS_ABORTED; /* Too many clusters for FAT12 */
|
|
|
|
/* Ok, it is the valid cluster configuration */
|
|
break;
|
|
} while (1);
|
|
|
|
#if FF_USE_TRIM
|
|
tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */
|
|
disk_ioctl(pdrv, CTRL_TRIM, tbl);
|
|
#endif
|
|
/* Create FAT VBR */
|
|
mem_set(buf, 0, ss);
|
|
mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */
|
|
st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */
|
|
buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */
|
|
st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */
|
|
buf[BPB_NumFATs] = (BYTE)n_fats; /* Number of FATs */
|
|
st_word(buf + BPB_RootEntCnt, (WORD)((fmt == FS_FAT32) ? 0 : n_rootdir)); /* Number of root directory entries */
|
|
if (sz_vol < 0x10000) {
|
|
st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */
|
|
} else {
|
|
st_dword(buf + BPB_TotSec32, sz_vol); /* Volume size in 32-bit LBA */
|
|
}
|
|
buf[BPB_Media] = 0xF8; /* Media descriptor byte */
|
|
st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */
|
|
st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */
|
|
st_dword(buf + BPB_HiddSec, b_vol); /* Volume offset in the physical drive [sector] */
|
|
if (fmt == FS_FAT32) {
|
|
st_dword(buf + BS_VolID32, GET_FATTIME()); /* VSN */
|
|
st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */
|
|
st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */
|
|
st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */
|
|
st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */
|
|
buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */
|
|
buf[BS_BootSig32] = 0x29; /* Extended boot signature */
|
|
mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
|
|
} else {
|
|
st_dword(buf + BS_VolID, GET_FATTIME()); /* VSN */
|
|
st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */
|
|
buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */
|
|
buf[BS_BootSig] = 0x29; /* Extended boot signature */
|
|
mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
|
|
}
|
|
st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */
|
|
if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the VBR sector */
|
|
|
|
/* Create FSINFO record if needed */
|
|
if (fmt == FS_FAT32) {
|
|
disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */
|
|
mem_set(buf, 0, ss);
|
|
st_dword(buf + FSI_LeadSig, 0x41615252);
|
|
st_dword(buf + FSI_StrucSig, 0x61417272);
|
|
st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
|
|
st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */
|
|
st_word(buf + BS_55AA, 0xAA55);
|
|
disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */
|
|
disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */
|
|
}
|
|
|
|
/* Initialize FAT area */
|
|
mem_set(buf, 0, (UINT)szb_buf);
|
|
sect = b_fat; /* FAT start sector */
|
|
for (i = 0; i < n_fats; i++) { /* Initialize FATs each */
|
|
if (fmt == FS_FAT32) {
|
|
st_dword(buf + 0, 0xFFFFFFF8); /* Entry 0 */
|
|
st_dword(buf + 4, 0xFFFFFFFF); /* Entry 1 */
|
|
st_dword(buf + 8, 0x0FFFFFFF); /* Entry 2 (root directory) */
|
|
} else {
|
|
st_dword(buf + 0, (fmt == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* Entry 0 and 1 */
|
|
}
|
|
nsect = sz_fat; /* Number of FAT sectors */
|
|
do { /* Fill FAT sectors */
|
|
n = (nsect > sz_buf) ? sz_buf : nsect;
|
|
if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR;
|
|
mem_set(buf, 0, ss);
|
|
sect += n; nsect -= n;
|
|
} while (nsect);
|
|
}
|
|
|
|
/* Initialize root directory (fill with zero) */
|
|
nsect = (fmt == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */
|
|
do {
|
|
n = (nsect > sz_buf) ? sz_buf : nsect;
|
|
if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR;
|
|
sect += n; nsect -= n;
|
|
} while (nsect);
|
|
}
|
|
|
|
/* Determine system ID in the partition table */
|
|
if (FF_FS_EXFAT && fmt == FS_EXFAT) {
|
|
sys = 0x07; /* HPFS/NTFS/exFAT */
|
|
} else {
|
|
if (fmt == FS_FAT32) {
|
|
sys = 0x0C; /* FAT32X */
|
|
} else {
|
|
if (sz_vol >= 0x10000) {
|
|
sys = 0x06; /* FAT12/16 (large) */
|
|
} else {
|
|
sys = (fmt == FS_FAT16) ? 0x04 : 0x01; /* FAT16 : FAT12 */
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Update partition information */
|
|
if (FF_MULTI_PARTITION && part != 0) { /* Created in the existing partition */
|
|
/* Update system ID in the partition table */
|
|
if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Read the MBR */
|
|
buf[MBR_Table + (part - 1) * SZ_PTE + PTE_System] = sys; /* Set system ID */
|
|
if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it back to the MBR */
|
|
} else { /* Created as a new single partition */
|
|
if (!(opt & FM_SFD)) { /* Create partition table if in FDISK format */
|
|
mem_set(buf, 0, ss);
|
|
st_word(buf + BS_55AA, 0xAA55); /* MBR signature */
|
|
pte = buf + MBR_Table; /* Create partition table for single partition in the drive */
|
|
pte[PTE_Boot] = 0; /* Boot indicator */
|
|
pte[PTE_StHead] = 1; /* Start head */
|
|
pte[PTE_StSec] = 1; /* Start sector */
|
|
pte[PTE_StCyl] = 0; /* Start cylinder */
|
|
pte[PTE_System] = sys; /* System type */
|
|
n = (b_vol + sz_vol) / (63 * 255); /* (End CHS may be invalid) */
|
|
pte[PTE_EdHead] = 254; /* End head */
|
|
pte[PTE_EdSec] = (BYTE)(n >> 2 | 63); /* End sector */
|
|
pte[PTE_EdCyl] = (BYTE)n; /* End cylinder */
|
|
st_dword(pte + PTE_StLba, b_vol); /* Start offset in LBA */
|
|
st_dword(pte + PTE_SizLba, sz_vol); /* Size in sectors */
|
|
if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the MBR */
|
|
}
|
|
}
|
|
|
|
if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) return FR_DISK_ERR;
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
#if FF_MULTI_PARTITION
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Create Partition Table on the Physical Drive */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_fdisk (
|
|
BYTE pdrv, /* Physical drive number */
|
|
const DWORD* szt, /* Pointer to the size table for each partitions */
|
|
void* work /* Pointer to the working buffer */
|
|
)
|
|
{
|
|
UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
|
|
BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
|
|
DSTATUS stat;
|
|
DWORD sz_disk, sz_part, s_part;
|
|
|
|
|
|
stat = disk_initialize(pdrv);
|
|
if (stat & STA_NOINIT) return FR_NOT_READY;
|
|
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
|
|
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
|
|
|
|
/* Determine the CHS without any consideration of the drive geometry */
|
|
for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
|
|
if (n == 256) n--;
|
|
e_hd = n - 1;
|
|
sz_cyl = 63 * n;
|
|
tot_cyl = sz_disk / sz_cyl;
|
|
|
|
/* Create partition table */
|
|
mem_set(buf, 0, FF_MAX_SS);
|
|
p = buf + MBR_Table; b_cyl = 0;
|
|
for (i = 0; i < 4; i++, p += SZ_PTE) {
|
|
p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; /* Number of cylinders */
|
|
if (p_cyl == 0) continue;
|
|
s_part = (DWORD)sz_cyl * b_cyl;
|
|
sz_part = (DWORD)sz_cyl * p_cyl;
|
|
if (i == 0) { /* Exclude first track of cylinder 0 */
|
|
s_hd = 1;
|
|
s_part += 63; sz_part -= 63;
|
|
} else {
|
|
s_hd = 0;
|
|
}
|
|
e_cyl = b_cyl + p_cyl - 1; /* End cylinder */
|
|
if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
|
|
|
|
/* Set partition table */
|
|
p[1] = s_hd; /* Start head */
|
|
p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */
|
|
p[3] = (BYTE)b_cyl; /* Start cylinder */
|
|
p[4] = 0x07; /* System type (temporary setting) */
|
|
p[5] = e_hd; /* End head */
|
|
p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */
|
|
p[7] = (BYTE)e_cyl; /* End cylinder */
|
|
st_dword(p + 8, s_part); /* Start sector in LBA */
|
|
st_dword(p + 12, sz_part); /* Number of sectors */
|
|
|
|
/* Next partition */
|
|
b_cyl += p_cyl;
|
|
}
|
|
st_word(p, 0xAA55);
|
|
|
|
/* Write it to the MBR */
|
|
return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK;
|
|
}
|
|
|
|
#endif /* FF_MULTI_PARTITION */
|
|
#endif /* FF_USE_MKFS && !FF_FS_READONLY */
|
|
|
|
|
|
|
|
|
|
#if FF_USE_STRFUNC
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get a String from the File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
TCHAR* f_gets (
|
|
TCHAR* buff, /* Pointer to the string buffer to read */
|
|
int len, /* Size of string buffer (characters) */
|
|
FIL* fp /* Pointer to the file object */
|
|
)
|
|
{
|
|
int n = 0;
|
|
TCHAR c, *p = buff;
|
|
BYTE s[2];
|
|
UINT rc;
|
|
|
|
|
|
while (n < len - 1) { /* Read characters until buffer gets filled */
|
|
#if FF_LFN_UNICODE && FF_USE_LFN /* Unicode API */
|
|
#if FF_STRF_ENCODE == 3 /* Read a character in UTF-8 */
|
|
f_read(fp, s, 1, &rc);
|
|
if (rc != 1) break;
|
|
c = s[0];
|
|
if (c >= 0x80) {
|
|
if (c < 0xC0) continue; /* Skip stray trailer */
|
|
if (c < 0xE0) { /* Two-byte sequence (0x80-0x7FF) */
|
|
f_read(fp, s, 1, &rc);
|
|
if (rc != 1) break;
|
|
c = (c & 0x1F) << 6 | (s[0] & 0x3F);
|
|
if (c < 0x80) c = '?'; /* Reject invalid code range */
|
|
} else {
|
|
if (c < 0xF0) { /* Three-byte sequence (0x800-0xFFFF) */
|
|
f_read(fp, s, 2, &rc);
|
|
if (rc != 2) break;
|
|
c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F);
|
|
if (c < 0x800) c = '?'; /* Reject invalid code range */
|
|
} else { /* Reject four-byte sequence */
|
|
c = '?';
|
|
}
|
|
}
|
|
}
|
|
#elif FF_STRF_ENCODE == 2 /* Read a character in UTF-16BE */
|
|
f_read(fp, s, 2, &rc);
|
|
if (rc != 2) break;
|
|
c = s[1] + (s[0] << 8);
|
|
#elif FF_STRF_ENCODE == 1 /* Read a character in UTF-16LE */
|
|
f_read(fp, s, 2, &rc);
|
|
if (rc != 2) break;
|
|
c = s[0] + (s[1] << 8);
|
|
#else /* Read a character in ANSI/OEM */
|
|
f_read(fp, s, 1, &rc);
|
|
if (rc != 1) break;
|
|
c = s[0];
|
|
if (dbc_1st((BYTE)c)) {
|
|
f_read(fp, s, 1, &rc);
|
|
if (rc != 1) break;
|
|
c = (c << 8) + s[0];
|
|
}
|
|
c = ff_oem2uni(c, CODEPAGE); /* OEM -> Unicode */
|
|
if (!c) c = '?';
|
|
#endif
|
|
#else /* ANSI/OEM API: Read a character without conversion */
|
|
f_read(fp, s, 1, &rc);
|
|
if (rc != 1) break;
|
|
c = s[0];
|
|
#endif
|
|
if (FF_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */
|
|
*p++ = c;
|
|
n++;
|
|
if (c == '\n') break; /* Break on EOL */
|
|
}
|
|
*p = 0;
|
|
return n ? buff : 0; /* When no data read (eof or error), return with error. */
|
|
}
|
|
|
|
|
|
|
|
|
|
#if !FF_FS_READONLY
|
|
#include <stdarg.h>
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Put a Character to the File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
typedef struct {
|
|
FIL *fp; /* Ptr to the writing file */
|
|
int idx, nchr; /* Write index of buf[] (-1:error), number of chars written */
|
|
BYTE buf[64]; /* Write buffer */
|
|
} putbuff;
|
|
|
|
|
|
static
|
|
void putc_bfd ( /* Buffered write with code conversion */
|
|
putbuff* pb,
|
|
TCHAR c
|
|
)
|
|
{
|
|
UINT bw;
|
|
int i;
|
|
|
|
|
|
if (FF_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */
|
|
putc_bfd(pb, '\r');
|
|
}
|
|
|
|
i = pb->idx; /* Write index of pb->buf[] */
|
|
if (i < 0) return;
|
|
|
|
#if FF_LFN_UNICODE && FF_USE_LFN /* Unicode API */
|
|
#if FF_STRF_ENCODE == 3 /* Write a character in UTF-8 */
|
|
if (c < 0x80) { /* 7-bit */
|
|
pb->buf[i++] = (BYTE)c;
|
|
} else {
|
|
if (c < 0x800) { /* 11-bit */
|
|
pb->buf[i++] = (BYTE)(0xC0 | c >> 6);
|
|
} else { /* 16-bit */
|
|
pb->buf[i++] = (BYTE)(0xE0 | c >> 12);
|
|
pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F));
|
|
}
|
|
pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F));
|
|
}
|
|
#elif FF_STRF_ENCODE == 2 /* Write a character in UTF-16BE */
|
|
pb->buf[i++] = (BYTE)(c >> 8);
|
|
pb->buf[i++] = (BYTE)c;
|
|
#elif FF_STRF_ENCODE == 1 /* Write a character in UTF-16LE */
|
|
pb->buf[i++] = (BYTE)c;
|
|
pb->buf[i++] = (BYTE)(c >> 8);
|
|
#else /* Write a character in ANSI/OEM */
|
|
c = ff_uni2oem(c, CODEPAGE); /* Unicode -> OEM */
|
|
if (!c) c = '?';
|
|
if (c >= 0x100)
|
|
pb->buf[i++] = (BYTE)(c >> 8);
|
|
pb->buf[i++] = (BYTE)c;
|
|
#endif
|
|
#else /* ANSI/OEM API: Write a character without conversion */
|
|
pb->buf[i++] = (BYTE)c;
|
|
#endif
|
|
|
|
if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */
|
|
f_write(pb->fp, pb->buf, (UINT)i, &bw);
|
|
i = (bw == (UINT)i) ? 0 : -1;
|
|
}
|
|
pb->idx = i;
|
|
pb->nchr++;
|
|
}
|
|
|
|
|
|
static
|
|
int putc_flush ( /* Flush left characters in the buffer */
|
|
putbuff* pb
|
|
)
|
|
{
|
|
UINT nw;
|
|
|
|
if ( pb->idx >= 0 /* Flush buffered characters to the file */
|
|
&& f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK
|
|
&& (UINT)pb->idx == nw) return pb->nchr;
|
|
return EOF;
|
|
}
|
|
|
|
|
|
static
|
|
void putc_init ( /* Initialize write buffer */
|
|
putbuff* pb,
|
|
FIL* fp
|
|
)
|
|
{
|
|
pb->fp = fp;
|
|
pb->nchr = pb->idx = 0;
|
|
}
|
|
|
|
|
|
|
|
int f_putc (
|
|
TCHAR c, /* A character to be output */
|
|
FIL* fp /* Pointer to the file object */
|
|
)
|
|
{
|
|
putbuff pb;
|
|
|
|
|
|
putc_init(&pb, fp);
|
|
putc_bfd(&pb, c); /* Put the character */
|
|
return putc_flush(&pb);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Put a String to the File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
int f_puts (
|
|
const TCHAR* str, /* Pointer to the string to be output */
|
|
FIL* fp /* Pointer to the file object */
|
|
)
|
|
{
|
|
putbuff pb;
|
|
|
|
|
|
putc_init(&pb, fp);
|
|
while (*str) putc_bfd(&pb, *str++); /* Put the string */
|
|
return putc_flush(&pb);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Put a Formatted String to the File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
int f_printf (
|
|
FIL* fp, /* Pointer to the file object */
|
|
const TCHAR* fmt, /* Pointer to the format string */
|
|
... /* Optional arguments... */
|
|
)
|
|
{
|
|
va_list arp;
|
|
putbuff pb;
|
|
BYTE f, r;
|
|
UINT i, j, w;
|
|
DWORD v;
|
|
TCHAR c, d, str[32], *p;
|
|
|
|
|
|
putc_init(&pb, fp);
|
|
|
|
va_start(arp, fmt);
|
|
|
|
for (;;) {
|
|
c = *fmt++;
|
|
if (c == 0) break; /* End of string */
|
|
if (c != '%') { /* Non escape character */
|
|
putc_bfd(&pb, c);
|
|
continue;
|
|
}
|
|
w = f = 0;
|
|
c = *fmt++;
|
|
if (c == '0') { /* Flag: '0' padding */
|
|
f = 1; c = *fmt++;
|
|
} else {
|
|
if (c == '-') { /* Flag: left justified */
|
|
f = 2; c = *fmt++;
|
|
}
|
|
}
|
|
while (IsDigit(c)) { /* Precision */
|
|
w = w * 10 + c - '0';
|
|
c = *fmt++;
|
|
}
|
|
if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
|
|
f |= 4; c = *fmt++;
|
|
}
|
|
if (!c) break;
|
|
d = c;
|
|
if (IsLower(d)) d -= 0x20;
|
|
switch (d) { /* Type is... */
|
|
case 'S' : /* String */
|
|
p = va_arg(arp, TCHAR*);
|
|
for (j = 0; p[j]; j++) ;
|
|
if (!(f & 2)) { /* Right pad */
|
|
while (j++ < w) putc_bfd(&pb, ' ');
|
|
}
|
|
while (*p) putc_bfd(&pb, *p++); /* String body */
|
|
while (j++ < w) putc_bfd(&pb, ' '); /* Left pad */
|
|
continue;
|
|
|
|
case 'C' : /* Character */
|
|
putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
|
|
|
|
case 'B' : /* Binary */
|
|
r = 2; break;
|
|
|
|
case 'O' : /* Octal */
|
|
r = 8; break;
|
|
|
|
case 'D' : /* Signed decimal */
|
|
case 'U' : /* Unsigned decimal */
|
|
r = 10; break;
|
|
|
|
case 'X' : /* Hexdecimal */
|
|
r = 16; break;
|
|
|
|
default: /* Unknown type (pass-through) */
|
|
putc_bfd(&pb, c); continue;
|
|
}
|
|
|
|
/* Get an argument and put it in numeral */
|
|
v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
|
|
if (d == 'D' && (v & 0x80000000)) {
|
|
v = 0 - v;
|
|
f |= 8;
|
|
}
|
|
i = 0;
|
|
do {
|
|
d = (TCHAR)(v % r); v /= r;
|
|
if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
|
|
str[i++] = d + '0';
|
|
} while (v && i < sizeof str / sizeof *str);
|
|
if (f & 8) str[i++] = '-';
|
|
j = i; d = (f & 1) ? '0' : ' ';
|
|
if (!(f & 2)) {
|
|
while (j++ < w) putc_bfd(&pb, d); /* Right pad */
|
|
}
|
|
do {
|
|
putc_bfd(&pb, str[--i]); /* Number body */
|
|
} while (i);
|
|
while (j++ < w) putc_bfd(&pb, d); /* Left pad */
|
|
}
|
|
|
|
va_end(arp);
|
|
|
|
return putc_flush(&pb);
|
|
}
|
|
|
|
#endif /* !FF_FS_READONLY */
|
|
#endif /* FF_USE_STRFUNC */
|
|
|
|
|
|
|
|
#if FF_CODE_PAGE == 0
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Set Active Codepage for the Path Name */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT f_setcp (
|
|
WORD cp /* Value to be set as active code page */
|
|
)
|
|
{
|
|
static const WORD validcp[] = { 437, 720, 737, 771, 775, 850, 852, 857, 860, 861, 862, 863, 864, 865, 866, 869, 932, 936, 949, 950, 0};
|
|
static const BYTE *const tables[] = {Ct437, Ct720, Ct737, Ct771, Ct775, Ct850, Ct852, Ct857, Ct860, Ct861, Ct862, Ct863, Ct864, Ct865, Ct866, Ct869, Dc932, Dc936, Dc949, Dc950, 0};
|
|
UINT i;
|
|
|
|
|
|
for (i = 0; validcp[i] != 0 && validcp[i] != cp; i++) ; /* Find the code page */
|
|
if (validcp[i] != cp) return FR_INVALID_PARAMETER;
|
|
|
|
CodePage = cp;
|
|
if (cp >= 900) { /* DBCS */
|
|
ExCvt = 0;
|
|
DbcTbl = tables[i];
|
|
} else { /* SBCS */
|
|
ExCvt = tables[i];
|
|
DbcTbl = 0;
|
|
}
|
|
return FR_OK;
|
|
}
|
|
#endif /* FF_CODE_PAGE == 0 */
|
|
|
|
|