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[2.0.x] Fix SD wrong filename list (#9342)

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If last file in directory has short filename and is preceded by a deleted long file name. SD menu will wrongly report long deleted file name as last entry
This commit is contained in:
GMagician 2018-01-26 21:03:51 +01:00 committed by Scott Lahteine
parent 5bd23db0ee
commit 6d4bc9a1f8
1 changed files with 9 additions and 5 deletions
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14
Marlin/src/sd/SdBaseFile.cpp
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@ -1054,8 +1054,9 @@ int8_t SdBaseFile::readDir(dir_t* dir, char* longFilename) {
// if not a directory file or miss-positioned return an error
if (!isDir() || (0x1F & curPosition_)) return -1;
//If we have a longFilename buffer, mark it as invalid. If we find a long filename it will be filled automaticly.
if (longFilename != NULL) longFilename[0] = '\0';
// If we have a longFilename buffer, mark it as invalid.
// If long filename is found it will be filled automatically.
if (longFilename) longFilename[0] = '\0';
while (1) {
@ -1065,12 +1066,15 @@ int8_t SdBaseFile::readDir(dir_t* dir, char* longFilename) {
// last entry if DIR_NAME_FREE
if (dir->name[0] == DIR_NAME_FREE) return 0;
// skip empty entries and entry for . and ..
if (dir->name[0] == DIR_NAME_DELETED || dir->name[0] == '.') continue;
// skip deleted entry and entry for . and ..
if (dir->name[0] == DIR_NAME_DELETED || dir->name[0] == '.') {
if (longFilename) longFilename[0] = '\0'; // Invalidate erased file long name, if any
continue;
}
// Fill the long filename if we have a long filename entry.
// Long filename entries are stored before the short filename.
if (longFilename != NULL && DIR_IS_LONG_NAME(dir)) {
if (longFilename && DIR_IS_LONG_NAME(dir)) {
vfat_t* VFAT = (vfat_t*)dir;
// Sanity-check the VFAT entry. The first cluster is always set to zero. And the sequence number should be higher than 0
if (VFAT->firstClusterLow == 0) {