/*----------------------------------------------------------------------------/ / Petit FatFs - FAT file system module R0.03 (C)ChaN, 2014 /-----------------------------------------------------------------------------/ / Petit FatFs module is a generic FAT file system module for small embedded / systems. This is a free software that opened for education, research and / commercial developments under license policy of following trems. / / Copyright (C) 2014, ChaN, all right reserved. / / * The Petit FatFs module is a free software and there is NO WARRANTY. / * No restriction on use. You can use, modify and redistribute it for / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. / * Redistributions of source code must retain the above copyright notice. / /-----------------------------------------------------------------------------/ / Jun 15,'09 R0.01a First release. / / Dec 14,'09 R0.02 Added multiple code page support. / Added write funciton. / Changed stream read mode interface. / Dec 07,'10 R0.02a Added some configuration options. / Fixed fails to open objects with DBCS character. / Jun 10,'14 R0.03 Separated out configuration options to pffconf.h. / Added _USE_LCC option. / Added _FS_FAT16 option. /----------------------------------------------------------------------------*/ #include "pff.h" /* Petit FatFs configurations and declarations */ #include "diskio.h" /* Declarations of low level disk I/O functions */ /*-------------------------------------------------------------------------- Module Private Definitions ---------------------------------------------------------------------------*/ #if _PFATFS != 4004 /* Revision ID */ #error Wrong include file (pff.h). #endif #if _FS_FAT32 #if !_FS_FAT16 && !_FS_FAT12 #define _FS_32ONLY 1 #else #define _FS_32ONLY 0 #endif #else #if !_FS_FAT16 && !_FS_FAT12 #error Wrong _FS_FATxx setting. #endif #define _FS_32ONLY 0 #endif #define ABORT(err) \ { \ fs->flag = 0; \ return err; \ } /*--------------------------------------------------------*/ /* DBCS code ranges and SBCS extend char conversion table */ /*--------------------------------------------------------*/ #if _CODE_PAGE == 932 /* Japanese Shift-JIS */ #define _DF1S 0x81 /* DBC 1st byte range 1 start */ #define _DF1E 0x9F /* DBC 1st byte range 1 end */ #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ #define _DF2E 0xFC /* DBC 1st byte range 2 end */ #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ #define _DF1S 0x81 #define _DF1E 0xFE #define _DS1S 0x40 #define _DS1E 0x7E #define _DS2S 0x80 #define _DS2E 0xFE #elif _CODE_PAGE == 949 /* Korean */ #define _DF1S 0x81 #define _DF1E 0xFE #define _DS1S 0x41 #define _DS1E 0x5A #define _DS2S 0x61 #define _DS2E 0x7A #define _DS3S 0x81 #define _DS3E 0xFE #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ #define _DF1S 0x81 #define _DF1E 0xFE #define _DS1S 0x40 #define _DS1E 0x7E #define _DS2S 0xA1 #define _DS2E 0xFE #elif _CODE_PAGE == 437 /* U.S. (OEM) */ #define _EXCVT \ { \ 0x80, 0x9A, 0x90, 0x41, 0x8E, 0x41, 0x8F, 0x80, 0x45, 0x45, 0x45, 0x49, 0x49, 0x49, 0x8E, 0x8F, 0x90, 0x92, \ 0x92, 0x4F, 0x99, 0x4F, 0x55, 0x55, 0x59, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0x41, 0x49, 0x4F, \ 0x55, 0xA5, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0x21, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, \ 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 720 /* Arabic (OEM) */ #define _EXCVT \ { \ 0x80, 0x81, 0x45, 0x41, 0x84, 0x41, 0x86, 0x43, 0x45, 0x45, 0x45, 0x49, 0x49, 0x8D, 0x8E, 0x8F, 0x90, 0x92, \ 0x92, 0x93, 0x94, 0x95, 0x49, 0x49, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, \ 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 737 /* Greek (OEM) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x92, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, \ 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0xAA, 0x92, 0x93, 0x94, 0x95, 0x96, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0x97, 0xEA, 0xEB, 0xEC, 0xE4, 0xED, 0xEE, \ 0xE7, 0xE8, 0xF1, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 775 /* Baltic (OEM) */ #define _EXCVT \ { \ 0x80, 0x9A, 0x91, 0xA0, 0x8E, 0x95, 0x8F, 0x80, 0xAD, 0xED, 0x8A, 0x8A, 0xA1, 0x8D, 0x8E, 0x8F, 0x90, 0x92, \ 0x92, 0xE2, 0x99, 0x95, 0x96, 0x97, 0x97, 0x99, 0x9A, 0x9D, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xE0, \ 0xA3, 0xA3, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xB5, 0xB6, 0xB7, 0xB8, 0xBD, 0xBE, \ 0xC6, 0xC7, 0xA5, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE5, 0xE5, 0xE6, \ 0xE3, 0xE8, 0xE8, 0xEA, 0xEA, 0xEE, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */ #define _EXCVT \ { \ 0x80, 0x9A, 0x90, 0xB6, 0x8E, 0xB7, 0x8F, 0x80, 0xD2, 0xD3, 0xD4, 0xD8, 0xD7, 0xDE, 0x8E, 0x8F, 0x90, 0x92, \ 0x92, 0xE2, 0x99, 0xE3, 0xEA, 0xEB, 0x59, 0x99, 0x9A, 0x9D, 0x9C, 0x9D, 0x9E, 0x9F, 0xB5, 0xD6, 0xE0, \ 0xE9, 0xA5, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0x21, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC7, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE5, 0xE5, 0xE6, \ 0xE7, 0xE7, 0xE9, 0xEA, 0xEB, 0xED, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */ #define _EXCVT \ { \ 0x80, 0x9A, 0x90, 0xB6, 0x8E, 0xDE, 0x8F, 0x80, 0x9D, 0xD3, 0x8A, 0x8A, 0xD7, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x91, 0xE2, 0x99, 0x95, 0x95, 0x97, 0x97, 0x99, 0x9A, 0x9B, 0x9B, 0x9D, 0x9E, 0x9F, 0xB5, 0xD6, 0xE0, \ 0xE9, 0xA4, 0xA4, 0xA6, 0xA6, 0xA8, 0xA8, 0xAA, 0x8D, 0xAC, 0xB8, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBD, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC6, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD1, 0xD1, 0xD2, 0xD3, 0xD2, 0xD5, \ 0xD6, 0xD7, 0xB7, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE3, 0xD5, 0xE6, \ 0xE6, 0xE8, 0xE9, 0xE8, 0xEB, 0xED, 0xED, 0xDD, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xEB, 0xFC, 0xFC, 0xFE, 0xFF \ } #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */ #define _EXCVT \ { \ 0x81, 0x81, 0x83, 0x83, 0x85, 0x85, 0x87, 0x87, 0x89, 0x89, 0x8B, 0x8B, 0x8D, 0x8D, 0x8F, 0x8F, 0x91, 0x91, \ 0x93, 0x93, 0x95, 0x95, 0x97, 0x97, 0x99, 0x99, 0x9B, 0x9B, 0x9D, 0x9D, 0x9F, 0x9F, 0xA1, 0xA1, 0xA3, \ 0xA3, 0xA5, 0xA5, 0xA7, 0xA7, 0xA9, 0xA9, 0xAB, 0xAB, 0xAD, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB6, 0xB6, 0xB8, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBE, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC7, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD1, 0xD1, 0xD3, 0xD3, 0xD5, 0xD5, \ 0xD7, 0xD7, 0xDD, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xE0, 0xDF, 0xE0, 0xE2, 0xE2, 0xE4, 0xE4, 0xE6, 0xE6, \ 0xE8, 0xE8, 0xEA, 0xEA, 0xEC, 0xEC, 0xEE, 0xEE, 0xEF, 0xF0, 0xF2, 0xF2, 0xF4, 0xF4, 0xF6, 0xF6, 0xF8, \ 0xF8, 0xFA, 0xFA, 0xFC, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 857 /* Turkish (OEM) */ #define _EXCVT \ { \ 0x80, 0x9A, 0x90, 0xB6, 0x8E, 0xB7, 0x8F, 0x80, 0xD2, 0xD3, 0xD4, 0xD8, 0xD7, 0x98, 0x8E, 0x8F, 0x90, 0x92, \ 0x92, 0xE2, 0x99, 0xE3, 0xEA, 0xEB, 0x98, 0x99, 0x9A, 0x9D, 0x9C, 0x9D, 0x9E, 0x9E, 0xB5, 0xD6, 0xE0, \ 0xE9, 0xA5, 0xA5, 0xA6, 0xA6, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0x21, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC7, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE5, 0xE5, 0xE6, \ 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xDE, 0x59, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */ #define _EXCVT \ { \ 0x80, 0x9A, 0x90, 0xB6, 0x8E, 0xB7, 0x8F, 0x80, 0xD2, 0xD3, 0xD4, 0xD8, 0xD7, 0xDE, 0x8E, 0x8F, 0x90, 0x92, \ 0x92, 0xE2, 0x99, 0xE3, 0xEA, 0xEB, 0x59, 0x99, 0x9A, 0x9D, 0x9C, 0x9D, 0x9E, 0x9F, 0xB5, 0xD6, 0xE0, \ 0xE9, 0xA5, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0x21, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC7, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD1, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE5, 0xE5, 0xE6, \ 0xE7, 0xE7, 0xE9, 0xEA, 0xEB, 0xED, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 862 /* Hebrew (OEM) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0x41, 0x49, 0x4F, \ 0x55, 0xA5, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0x21, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, \ 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 866 /* Russian (OEM) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0x80, 0x81, 0x82, \ 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0x90, 0x91, 0x92, 0x93, 0x9d, 0x95, 0x96, \ 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xF0, 0xF0, 0xF2, 0xF2, 0xF4, 0xF4, 0xF6, 0xF6, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, \ 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x8A, 0x9B, 0x8C, 0x8D, 0x8E, 0x8F, 0xA0, 0xA1, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xA3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xA5, 0xAA, 0xBB, 0xBC, 0xBD, 0xBC, 0xAF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, \ 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xF7, \ 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xFF \ } #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x82, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x80, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x8A, 0x9B, 0x8C, 0x8D, 0x8E, 0x8F, 0xA0, 0xA2, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB2, \ 0xA5, 0xB5, 0xB6, 0xB7, 0xA8, 0xB9, 0xAA, 0xBB, 0xA3, 0xBD, 0xBD, 0xAF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, \ 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, \ 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF \ } #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0xAd, 0x9B, 0x8C, 0x9D, 0xAE, 0x9F, 0xA0, 0x21, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, \ 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xF7, \ 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0x9F \ } #elif _CODE_PAGE == 1253 /* Greek (Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xA2, 0xB8, 0xB9, 0xBA, 0xE0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, \ 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xF2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, \ 0xD8, 0xD9, 0xDA, 0xFB, 0xBC, 0xFD, 0xBF, 0xFF \ } #elif _CODE_PAGE == 1254 /* Turkish (Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x8A, 0x9B, 0x8C, 0x9D, 0x9E, 0x9F, 0xA0, 0x21, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, \ 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xF7, \ 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0x9F \ } #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0x21, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, \ 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, \ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 1256 /* Arabic (Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x8C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0x41, 0xE1, 0x41, 0xE3, 0xE4, 0xE5, 0xE6, \ 0x43, 0x45, 0x45, 0x45, 0x45, 0xEC, 0xED, 0x49, 0x49, 0xF0, 0xF1, 0xF2, 0xF3, 0x4F, 0xF5, 0xF6, 0xF7, \ 0xF8, 0x55, 0xFA, 0x55, 0x55, 0xFD, 0xFE, 0xFF \ } #elif _CODE_PAGE == 1257 /* Baltic (Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xA8, 0xB9, 0xAA, 0xBB, 0xBC, 0xBD, 0xBE, 0xAF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, \ 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xF7, \ 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xFF \ } #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */ #define _EXCVT \ { \ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, \ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0xAC, 0x9D, 0x9E, 0x9F, 0xA0, 0x21, 0xA2, \ 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, \ 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, \ 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, \ 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, \ 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xEC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xF2, 0xD3, 0xD4, 0xD5, 0xD6, 0xF7, \ 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xFE, 0x9F \ } #else #error Unknown code page. #endif /* Character code support macros */ #define IsUpper(c) (((c) >= 'A') && ((c) <= 'Z')) #define IsLower(c) (((c) >= 'a') && ((c) <= 'z')) #ifndef _EXCVT /* DBCS configuration */ #ifdef _DF2S /* Two 1st byte areas */ #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) #else /* One 1st byte area */ #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) #endif #ifdef _DS3S /* Three 2nd byte areas */ #define IsDBCS2(c) \ (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) \ || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) #else /* Two 2nd byte areas */ #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) #endif #else /* SBCS configuration */ #define IsDBCS1(c) 0 #define IsDBCS2(c) 0 #endif /* _EXCVT */ /* FatFs refers the members in the FAT structures with byte offset instead / of structure member because there are incompatibility of the packing option / between various compilers. */ #define BS_jmpBoot 0 #define BS_OEMName 3 #define BPB_BytsPerSec 11 #define BPB_SecPerClus 13 #define BPB_RsvdSecCnt 14 #define BPB_NumFATs 16 #define BPB_RootEntCnt 17 #define BPB_TotSec16 19 #define BPB_Media 21 #define BPB_FATSz16 22 #define BPB_SecPerTrk 24 #define BPB_NumHeads 26 #define BPB_HiddSec 28 #define BPB_TotSec32 32 #define BS_55AA 510 #define BS_DrvNum 36 #define BS_BootSig 38 #define BS_VolID 39 #define BS_VolLab 43 #define BS_FilSysType 54 #define BPB_FATSz32 36 #define BPB_ExtFlags 40 #define BPB_FSVer 42 #define BPB_RootClus 44 #define BPB_FSInfo 48 #define BPB_BkBootSec 50 #define BS_DrvNum32 64 #define BS_BootSig32 66 #define BS_VolID32 67 #define BS_VolLab32 71 #define BS_FilSysType32 82 #define MBR_Table 446 #define DIR_Name 0 #define DIR_Attr 11 #define DIR_NTres 12 #define DIR_CrtTime 14 #define DIR_CrtDate 16 #define DIR_FstClusHI 20 #define DIR_WrtTime 22 #define DIR_WrtDate 24 #define DIR_FstClusLO 26 #define DIR_FileSize 28 /*-------------------------------------------------------------------------- Private Functions ---------------------------------------------------------------------------*/ static FATFS *FatFs; /* Pointer to the file system object (logical drive) */ /* Fill memory */ static void mem_set(void *dst, int val, int cnt) { char *d = (char *)dst; while (cnt--) *d++ = (char)val; } /* Compare memory to memory */ static int mem_cmp(const void *dst, const void *src, int cnt) { const char *d = (const char *)dst, *s = (const char *)src; int r = 0; while (cnt-- && (r = *d++ - *s++) == 0) ; return r; } /*-----------------------------------------------------------------------*/ /* FAT access - Read value of a FAT entry */ /*-----------------------------------------------------------------------*/ static CLUST get_fat( /* 1:IO error, Else:Cluster status */ CLUST clst /* Cluster# to get the link information */ ) { BYTE buf[4]; FATFS *fs = FatFs; if (clst < 2 || clst >= fs->n_fatent) /* Range check */ return 1; switch (fs->fs_type) { #if _FS_FAT12 case FS_FAT12: { UINT wc, bc, ofs; bc = (UINT)clst; bc += bc / 2; ofs = bc % 512; bc /= 512; if (ofs != 511) { if (disk_readp(buf, fs->fatbase + bc, ofs, 2)) break; } else { if (disk_readp(buf, fs->fatbase + bc, 511, 1)) break; if (disk_readp(buf + 1, fs->fatbase + bc + 1, 0, 1)) break; } wc = LD_WORD(buf); return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); } #endif #if _FS_FAT16 case FS_FAT16: if (disk_readp(buf, fs->fatbase + clst / 256, ((UINT)clst % 256) * 2, 2)) break; return LD_WORD(buf); #endif #if _FS_FAT32 case FS_FAT32: if (disk_readp(buf, fs->fatbase + clst / 128, ((UINT)clst % 128) * 4, 4)) break; return LD_DWORD(buf) & 0x0FFFFFFF; #endif } return 1; /* An error occured at the disk I/O layer */ } /*-----------------------------------------------------------------------*/ /* Get sector# from cluster# / Get cluster field from directory entry */ /*-----------------------------------------------------------------------*/ static DWORD clust2sect( /* !=0: Sector number, 0: Failed - invalid cluster# */ CLUST clst /* Cluster# to be converted */ ) { FATFS *fs = FatFs; clst -= 2; if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */ return (DWORD)clst * fs->csize + fs->database; } static CLUST get_clust(BYTE *dir /* Pointer to directory entry */ ) { FATFS *fs = FatFs; CLUST clst = 0; if (_FS_32ONLY || (_FS_FAT32 && fs->fs_type == FS_FAT32)) { clst = LD_WORD(dir + DIR_FstClusHI); clst <<= 16; } clst |= LD_WORD(dir + DIR_FstClusLO); return clst; } /*-----------------------------------------------------------------------*/ /* Directory handling - Rewind directory index */ /*-----------------------------------------------------------------------*/ static FRESULT dir_rewind(DIR *dj /* Pointer to directory object */ ) { CLUST clst; FATFS *fs = FatFs; dj->index = 0; clst = dj->sclust; if (clst == 1 || clst >= fs->n_fatent) /* Check start cluster range */ return FR_DISK_ERR; if (_FS_FAT32 && !clst && (_FS_32ONLY || fs->fs_type == FS_FAT32)) /* Replace cluster# 0 with root cluster# if in FAT32 */ clst = (CLUST)fs->dirbase; dj->clust = clst; /* Current cluster */ dj->sect = (_FS_32ONLY || clst) ? clust2sect(clst) : fs->dirbase; /* Current sector */ return FR_OK; /* Seek succeeded */ } /*-----------------------------------------------------------------------*/ /* Directory handling - Move directory index next */ /*-----------------------------------------------------------------------*/ static FRESULT dir_next( /* FR_OK:Succeeded, FR_NO_FILE:End of table */ DIR *dj /* Pointer to directory object */ ) { CLUST clst; WORD i; FATFS *fs = FatFs; i = dj->index + 1; if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ return FR_NO_FILE; if (!(i % 16)) { /* Sector changed? */ dj->sect++; /* Next sector */ if (dj->clust == 0) { /* Static table */ if (i >= fs->n_rootdir) /* Report EOT when end of table */ return FR_NO_FILE; } else { /* Dynamic table */ if (((i / 16) & (fs->csize - 1)) == 0) { /* Cluster changed? */ clst = get_fat(dj->clust); /* Get next cluster */ if (clst <= 1) return FR_DISK_ERR; if (clst >= fs->n_fatent) /* When it reached end of dynamic table */ return FR_NO_FILE; /* Report EOT */ dj->clust = clst; /* Initialize data for new cluster */ dj->sect = clust2sect(clst); } } } dj->index = i; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Directory handling - Find an object in the directory */ /*-----------------------------------------------------------------------*/ static FRESULT dir_find(DIR * dj, /* Pointer to the directory object linked to the file name */ BYTE *dir /* 32-byte working buffer */ ) { FRESULT res; BYTE c; res = dir_rewind(dj); /* Rewind directory object */ if (res != FR_OK) return res; do { res = disk_readp(dir, dj->sect, (dj->index % 16) * 32, 32) /* Read an entry */ ? FR_DISK_ERR : FR_OK; if (res != FR_OK) break; c = dir[DIR_Name]; /* First character */ if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ break; res = dir_next(dj); /* Next entry */ } while (res == FR_OK); return res; } /*-----------------------------------------------------------------------*/ /* Read an object from the directory */ /*-----------------------------------------------------------------------*/ #if _USE_DIR static FRESULT dir_read(DIR * dj, /* Pointer to the directory object to store read object name */ BYTE *dir /* 32-byte working buffer */ ) { FRESULT res; BYTE a, c; res = FR_NO_FILE; while (dj->sect) { res = disk_readp(dir, dj->sect, (dj->index % 16) * 32, 32) /* Read an entry */ ? FR_DISK_ERR : FR_OK; if (res != FR_OK) break; c = dir[DIR_Name]; if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ a = dir[DIR_Attr] & AM_MASK; if (c != 0xE5 && c != '.' && !(a & AM_VOL)) /* Is it a valid entry? */ break; res = dir_next(dj); /* Next entry */ if (res != FR_OK) break; } if (res != FR_OK) dj->sect = 0; return res; } #endif /*-----------------------------------------------------------------------*/ /* Pick a segment and create the object name in directory form */ /*-----------------------------------------------------------------------*/ static FRESULT create_name(DIR * dj, /* Pointer to the directory object */ const char **path /* Pointer to pointer to the segment in the path string */ ) { BYTE c, ni, si, i, *sfn; const char *p; #if _USE_LCC #ifdef _EXCVT static const BYTE cvt[] = _EXCVT; #endif #endif /* Create file name in directory form */ sfn = dj->fn; mem_set(sfn, ' ', 11); si = i = 0; ni = 8; p = *path; for (;;) { c = p[si++]; if (c <= ' ' || c == '/') break; /* Break on end of segment */ if (c == '.' || i >= ni) { if (ni != 8 || c != '.') break; i = 8; ni = 11; continue; } #if _USE_LCC #ifdef _EXCVT if (c >= 0x80) /* To upper extended char (SBCS) */ c = cvt[c - 0x80]; #endif if (IsDBCS1(c) && i < ni - 1) { /* DBC 1st byte? */ BYTE d = p[si++]; /* Get 2nd byte */ sfn[i++] = c; sfn[i++] = d; } else #endif { /* Single byte code */ if (_USE_LCC && IsLower(c)) c -= 0x20; /* toupper */ sfn[i++] = c; } } *path = &p[si]; /* Rerurn pointer to the next segment */ sfn[11] = (c <= ' ') ? 1 : 0; /* Set last segment flag if end of path */ return FR_OK; } /*-----------------------------------------------------------------------*/ /* Get file information from directory entry */ /*-----------------------------------------------------------------------*/ #if _USE_DIR static void get_fileinfo( /* No return code */ DIR * dj, /* Pointer to the directory object */ BYTE * dir, /* 32-byte working buffer */ FILINFO *fno /* Pointer to store the file information */ ) { BYTE i, c; char *p; p = fno->fname; if (dj->sect) { for (i = 0; i < 8; i++) { /* Copy file name body */ c = dir[i]; if (c == ' ') break; if (c == 0x05) c = 0xE5; *p++ = c; } if (dir[8] != ' ') { /* Copy file name extension */ *p++ = '.'; for (i = 8; i < 11; i++) { c = dir[i]; if (c == ' ') break; *p++ = c; } } fno->fattrib = dir[DIR_Attr]; /* Attribute */ fno->fsize = LD_DWORD(dir + DIR_FileSize); /* Size */ fno->fdate = LD_WORD(dir + DIR_WrtDate); /* Date */ fno->ftime = LD_WORD(dir + DIR_WrtTime); /* Time */ } *p = 0; } #endif /* _USE_DIR */ /*-----------------------------------------------------------------------*/ /* Follow a file path */ /*-----------------------------------------------------------------------*/ static FRESULT follow_path( /* FR_OK(0): successful, !=0: error code */ DIR * dj, /* Directory object to return last directory and found object */ BYTE * dir, /* 32-byte working buffer */ const char *path /* Full-path string to find a file or directory */ ) { FRESULT res; while (*path == ' ') path++; /* Strip leading spaces */ if (*path == '/') path++; /* Strip heading separator if exist */ dj->sclust = 0; /* Set start directory (always root dir) */ if ((BYTE)*path < ' ') { /* Null path means the root directory */ res = dir_rewind(dj); dir[0] = 0; } else { /* Follow path */ for (;;) { res = create_name(dj, &path); /* Get a segment */ if (res != FR_OK) break; res = dir_find(dj, dir); /* Find it */ if (res != FR_OK) break; /* Could not find the object */ if (dj->fn[11]) break; /* Last segment match. Function completed. */ if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow path because it is a file */ res = FR_NO_FILE; break; } dj->sclust = get_clust(dir); /* Follow next */ } } return res; } /*-----------------------------------------------------------------------*/ /* Check a sector if it is an FAT boot record */ /*-----------------------------------------------------------------------*/ static BYTE check_fs(/* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */ BYTE *buf, /* Working buffer */ DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ ) { if (disk_readp(buf, sect, 510, 2)) /* Read the boot record */ return 3; if (LD_WORD(buf) != 0xAA55) /* Check record signature */ return 2; if (!_FS_32ONLY && !disk_readp(buf, sect, BS_FilSysType, 2) && LD_WORD(buf) == 0x4146) /* Check FAT12/16 */ return 0; if (_FS_FAT32 && !disk_readp(buf, sect, BS_FilSysType32, 2) && LD_WORD(buf) == 0x4146) /* Check FAT32 */ return 0; return 1; } /*-------------------------------------------------------------------------- Public Functions --------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/ /* Mount/Unmount a Locical Drive */ /*-----------------------------------------------------------------------*/ FRESULT pf_mount(FATFS *fs /* Pointer to new file system object */ ) { BYTE fmt, buf[36]; DWORD bsect, fsize, tsect, mclst; FatFs = 0; if (disk_initialize() & STA_NOINIT) /* Check if the drive is ready or not */ return FR_NOT_READY; /* Search FAT partition on the drive */ bsect = 0; fmt = check_fs(buf, bsect); /* Check sector 0 as an SFD format */ if (fmt == 1) { /* Not an FAT boot record, it may be FDISK format */ /* Check a partition listed in top of the partition table */ if (disk_readp(buf, bsect, MBR_Table, 16)) { /* 1st partition entry */ fmt = 3; } else { if (buf[4]) { /* Is the partition existing? */ bsect = LD_DWORD(&buf[8]); /* Partition offset in LBA */ fmt = check_fs(buf, bsect); /* Check the partition */ } } } if (fmt == 3) return FR_DISK_ERR; if (fmt) return FR_NO_FILESYSTEM; /* No valid FAT patition is found */ /* Initialize the file system object */ if (disk_readp(buf, bsect, 13, sizeof(buf))) return FR_DISK_ERR; fsize = LD_WORD(buf + BPB_FATSz16 - 13); /* Number of sectors per FAT */ if (!fsize) fsize = LD_DWORD(buf + BPB_FATSz32 - 13); fsize *= buf[BPB_NumFATs - 13]; /* Number of sectors in FAT area */ fs->fatbase = bsect + LD_WORD(buf + BPB_RsvdSecCnt - 13); /* FAT start sector (lba) */ fs->csize = buf[BPB_SecPerClus - 13]; /* Number of sectors per cluster */ fs->n_rootdir = LD_WORD(buf + BPB_RootEntCnt - 13); /* Nmuber of root directory entries */ tsect = LD_WORD(buf + BPB_TotSec16 - 13); /* Number of sectors on the file system */ if (!tsect) tsect = LD_DWORD(buf + BPB_TotSec32 - 13); mclst = (tsect /* Last cluster# + 1 */ - LD_WORD(buf + BPB_RsvdSecCnt - 13) - fsize - fs->n_rootdir / 16) / fs->csize + 2; fs->n_fatent = (CLUST)mclst; fmt = 0; /* Determine the FAT sub type */ if (_FS_FAT12 && mclst < 0xFF7) fmt = FS_FAT12; if (_FS_FAT16 && mclst >= 0xFF8 && mclst < 0xFFF7) fmt = FS_FAT16; if (_FS_FAT32 && mclst >= 0xFFF7) fmt = FS_FAT32; if (!fmt) return FR_NO_FILESYSTEM; fs->fs_type = fmt; if (_FS_32ONLY || (_FS_FAT32 && fmt == FS_FAT32)) fs->dirbase = LD_DWORD(buf + (BPB_RootClus - 13)); /* Root directory start cluster */ else fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */ fs->database = fs->fatbase + fsize + fs->n_rootdir / 16; /* Data start sector (lba) */ fs->flag = 0; FatFs = fs; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Open or Create a File */ /*-----------------------------------------------------------------------*/ FRESULT pf_open(const char *path /* Pointer to the file name */ ) { FRESULT res; DIR dj; BYTE sp[12], dir[32]; FATFS * fs = FatFs; if (!fs) return FR_NOT_ENABLED; /* Check file system */ fs->flag = 0; dj.fn = sp; res = follow_path(&dj, dir, path); /* Follow the file path */ if (res != FR_OK) return res; /* Follow failed */ if (!dir[0] || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */ return FR_NO_FILE; fs->org_clust = get_clust(dir); /* File start cluster */ fs->fsize = LD_DWORD(dir + DIR_FileSize); /* File size */ fs->fptr = 0; /* File pointer */ fs->flag = FA_OPENED; return FR_OK; } /*-----------------------------------------------------------------------*/ /* Read File */ /*-----------------------------------------------------------------------*/ #if _USE_READ FRESULT pf_read(void *buff, /* Pointer to the read buffer (NULL:Forward data to the stream)*/ UINT btr, /* Number of bytes to read */ UINT *br /* Pointer to number of bytes read */ ) { DRESULT dr; CLUST clst; DWORD sect, remain; UINT rcnt; BYTE cs, *rbuff = buff; FATFS * fs = FatFs; *br = 0; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) /* Check if opened */ return FR_NOT_OPENED; remain = fs->fsize - fs->fptr; if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ while (btr) { /* Repeat until all data transferred */ if ((fs->fptr % 512) == 0) { /* On the sector boundary? */ cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */ if (!cs) { /* On the cluster boundary? */ if (fs->fptr == 0) /* On the top of the file? */ clst = fs->org_clust; else clst = get_fat(fs->curr_clust); if (clst <= 1) ABORT(FR_DISK_ERR); fs->curr_clust = clst; /* Update current cluster */ } sect = clust2sect(fs->curr_clust); /* Get current sector */ if (!sect) ABORT(FR_DISK_ERR); fs->dsect = sect + cs; } rcnt = 512 - (UINT)fs->fptr % 512; /* Get partial sector data from sector buffer */ if (rcnt > btr) rcnt = btr; dr = disk_readp(!buff ? 0 : rbuff, fs->dsect, (UINT)fs->fptr % 512, rcnt); if (dr) ABORT(FR_DISK_ERR); fs->fptr += rcnt; rbuff += rcnt; /* Update pointers and counters */ btr -= rcnt; *br += rcnt; } return FR_OK; } #endif /*-----------------------------------------------------------------------*/ /* Write File */ /*-----------------------------------------------------------------------*/ #if _USE_WRITE FRESULT pf_write(const void *buff, /* Pointer to the data to be written */ UINT btw, /* Number of bytes to write (0:Finalize the current write operation) */ UINT * bw /* Pointer to number of bytes written */ ) { CLUST clst; DWORD sect, remain; const BYTE *p = buff; BYTE cs; UINT wcnt; FATFS * fs = FatFs; *bw = 0; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) /* Check if opened */ return FR_NOT_OPENED; if (!btw) { /* Finalize request */ if ((fs->flag & FA__WIP) && disk_writep(0, 0)) ABORT(FR_DISK_ERR); fs->flag &= ~FA__WIP; return FR_OK; } else { /* Write data request */ if (!(fs->flag & FA__WIP)) /* Round-down fptr to the sector boundary */ fs->fptr &= 0xFFFFFE00; } remain = fs->fsize - fs->fptr; if (btw > remain) btw = (UINT)remain; /* Truncate btw by remaining bytes */ while (btw) { /* Repeat until all data transferred */ if ((UINT)fs->fptr % 512 == 0) { /* On the sector boundary? */ cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */ if (!cs) { /* On the cluster boundary? */ if (fs->fptr == 0) /* On the top of the file? */ clst = fs->org_clust; else clst = get_fat(fs->curr_clust); if (clst <= 1) ABORT(FR_DISK_ERR); fs->curr_clust = clst; /* Update current cluster */ } sect = clust2sect(fs->curr_clust); /* Get current sector */ if (!sect) ABORT(FR_DISK_ERR); fs->dsect = sect + cs; if (disk_writep(0, fs->dsect)) ABORT(FR_DISK_ERR); /* Initiate a sector write operation */ fs->flag |= FA__WIP; } wcnt = 512 - (UINT)fs->fptr % 512; /* Number of bytes to write to the sector */ if (wcnt > btw) wcnt = btw; if (disk_writep(p, wcnt)) ABORT(FR_DISK_ERR); /* Send data to the sector */ fs->fptr += wcnt; p += wcnt; /* Update pointers and counters */ btw -= wcnt; *bw += wcnt; if ((UINT)fs->fptr % 512 == 0) { if (disk_writep(0, 0)) ABORT(FR_DISK_ERR); /* Finalize the current sector write operation */ fs->flag &= ~FA__WIP; } } return FR_OK; } #endif /*-----------------------------------------------------------------------*/ /* Seek File R/W Pointer */ /*-----------------------------------------------------------------------*/ #if _USE_LSEEK FRESULT pf_lseek(DWORD ofs /* File pointer from top of file */ ) { CLUST clst; DWORD bcs, sect, ifptr; FATFS *fs = FatFs; if (!fs) return FR_NOT_ENABLED; /* Check file system */ if (!(fs->flag & FA_OPENED)) /* Check if opened */ return FR_NOT_OPENED; if (ofs > fs->fsize) ofs = fs->fsize; /* Clip offset with the file size */ ifptr = fs->fptr; fs->fptr = 0; if (ofs > 0) { bcs = (DWORD)fs->csize * 512; /* Cluster size (byte) */ if (ifptr > 0 && (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ fs->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ ofs -= fs->fptr; clst = fs->curr_clust; } else { /* When seek to back cluster, */ clst = fs->org_clust; /* start from the first cluster */ fs->curr_clust = clst; } while (ofs > bcs) { /* Cluster following loop */ clst = get_fat(clst); /* Follow cluster chain */ if (clst <= 1 || clst >= fs->n_fatent) ABORT(FR_DISK_ERR); fs->curr_clust = clst; fs->fptr += bcs; ofs -= bcs; } fs->fptr += ofs; sect = clust2sect(clst); /* Current sector */ if (!sect) ABORT(FR_DISK_ERR); fs->dsect = sect + (fs->fptr / 512 & (fs->csize - 1)); } return FR_OK; } #endif /*-----------------------------------------------------------------------*/ /* Create a Directroy Object */ /*-----------------------------------------------------------------------*/ #if _USE_DIR FRESULT pf_opendir(DIR * dj, /* Pointer to directory object to create */ const char *path /* Pointer to the directory path */ ) { FRESULT res; BYTE sp[12], dir[32]; FATFS * fs = FatFs; if (!fs) { /* Check file system */ res = FR_NOT_ENABLED; } else { dj->fn = sp; res = follow_path(dj, dir, path); /* Follow the path to the directory */ if (res == FR_OK) { /* Follow completed */ if (dir[0]) { /* It is not the root dir */ if (dir[DIR_Attr] & AM_DIR) /* The object is a directory */ dj->sclust = get_clust(dir); else /* The object is not a directory */ res = FR_NO_FILE; } if (res == FR_OK) res = dir_rewind(dj); /* Rewind dir */ } } return res; } /*-----------------------------------------------------------------------*/ /* Read Directory Entry in Sequense */ /*-----------------------------------------------------------------------*/ FRESULT pf_readdir(DIR * dj, /* Pointer to the open directory object */ FILINFO *fno /* Pointer to file information to return */ ) { FRESULT res; BYTE sp[12], dir[32]; FATFS * fs = FatFs; if (!fs) { /* Check file system */ res = FR_NOT_ENABLED; } else { dj->fn = sp; if (!fno) { res = dir_rewind(dj); } else { res = dir_read(dj, dir); /* Get current directory item */ if (res == FR_NO_FILE) res = FR_OK; if (res == FR_OK) { /* A valid entry is found */ get_fileinfo(dj, dir, fno); /* Get the object information */ res = dir_next(dj); /* Increment read index for next */ if (res == FR_NO_FILE) res = FR_OK; } } } return res; } #endif /* _USE_DIR */