63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
|
//language.c
|
||
|
|
#include "language.h"
|
||
|
|
#include <inttypes.h>
|
||
|
|
#include <avr/pgmspace.h>
|
||
|
|
|
||
|
|
|
||
|
|
// Currectly active language selection.
|
||
|
|
unsigned char lang_selected = 0;
|
||
|
|
|
||
|
|
#if (LANG_MODE == 0) //primary language only
|
||
|
|
#else //(LANG_MODE == 0)
|
||
|
|
//reserved xx kbytes for secondary language table
|
||
|
|
static const char _SEC_LANG[LANG_SIZE_RESERVED] PROGMEM_I2 = "_SEC_LANG";
|
||
|
|
#endif //(LANG_MODE == 0)
|
||
|
|
|
||
|
|
//lang_table_t structure - 16byte header
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
uint32_t magic;
|
||
|
|
uint16_t size;
|
||
|
|
uint16_t count;
|
||
|
|
uint16_t checksum;
|
||
|
|
uint16_t reserved0;
|
||
|
|
uint32_t reserved1;
|
||
|
|
} header;
|
||
|
|
uint16_t table[];
|
||
|
|
} lang_table_t;
|
||
|
|
|
||
|
|
//lang_table pointer
|
||
|
|
lang_table_t* lang_table = 0;
|
||
|
|
|
||
|
|
|
||
|
|
const char* lang_get_translation(const char* s)
|
||
|
|
{
|
||
|
|
if (lang_selected == 0) return s + 2; //primary language selected
|
||
|
|
if (lang_table == 0) return s + 2; //sec. lang table not found
|
||
|
|
uint16_t ui = pgm_read_word(((uint16_t*)s)); //read string id
|
||
|
|
if (ui == 0xffff) return s + 2; //translation not found
|
||
|
|
ui = pgm_read_word(((uint16_t*)(((char*)lang_table + 16 + ui*2)))); //read relative offset
|
||
|
|
return (const char*)((char*)lang_table + ui + 16); //return calculated pointer
|
||
|
|
}
|
||
|
|
|
||
|
|
const char* lang_select(unsigned char lang)
|
||
|
|
{
|
||
|
|
#if (LANG_MODE == 0) //primary language only
|
||
|
|
return 0;
|
||
|
|
#else //(LANG_MODE == 0)
|
||
|
|
if (lang == 0) //primary language
|
||
|
|
{
|
||
|
|
lang_table = 0;
|
||
|
|
lang_selected = 0;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
uint16_t ui = (uint16_t)&_SEC_LANG; //pointer to _SEC_LANG reserved space
|
||
|
|
ui += 0x0100; //add 1 page
|
||
|
|
ui &= 0xff00; //align to page
|
||
|
|
lang_table = ui; //set table pointer
|
||
|
|
ui = pgm_read_word(((uint16_t*)(((char*)lang_table + 16)))); //read relative offset of first string (language name)
|
||
|
|
return (const char*)((char*)lang_table + ui + 16); //return calculated pointer
|
||
|
|
#endif //(LANG_MODE == 0)
|
||
|
|
}
|