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/*----------------------------------------------------------------------------/
/ Petit FatFs - FAT file system module R0.03a
/-----------------------------------------------------------------------------/
/
/ Copyright (C) 2019, ChaN, all right reserved.
/
/ Petit FatFs module is an open source software. Redistribution and use of
/ Petit FatFs in source and binary forms, with or without modification, are
/ permitted provided that the following condition is met:
/
/ 1. Redistributions of source code must retain the above copyright notice,
/ this condition and the following disclaimer.
/
/ This software is provided by the copyright holder and contributors "AS IS"
/ and any warranties related to this software are DISCLAIMED.
/ The copyright owner or contributors be NOT LIABLE for any damages caused
/ by use of this software.
/-----------------------------------------------------------------------------/
/ 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.
/
/ Jan 30,'19 R0.03a Supported stdint.h for C99 and later.
/ Removed _WORD_ACCESS option.
/ Changed prefix of configuration options, _ to PF_.
/ Added some code pages.
/ Removed some code pages actually not valid.
/----------------------------------------------------------------------------*/
#include "pff.h" /* Petit FatFs configurations and declarations */
#include "diskio.h" /* Declarations of low level disk I/O functions */
/*--------------------------------------------------------------------------
Module Private Definitions
---------------------------------------------------------------------------*/
#if PF_DEFINED != 8088 /* Revision ID */
#error Wrong include file (pff.h).
#endif
#if PF_FS_FAT32
#if !PF_FS_FAT16 && !PF_FS_FAT12
#define _FS_32ONLY 1
#else
#define _FS_32ONLY 0
#endif
#else
#if !PF_FS_FAT16 && !PF_FS_FAT12
#error Wrong PF_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 PF_USE_LCC == 0 /* ASCII upper case character only */
#elif PF_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 PF_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 PF_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 PF_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 PF_CODE_PAGE == 437 /* U.S. */
#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,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,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 PF_CODE_PAGE == 720 /* Arabic */
#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 PF_CODE_PAGE == 737 /* Greek */
#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,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif PF_CODE_PAGE == 771 /* KBL */
#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,0xDC,0xDE,0xDE, \
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
#elif PF_CODE_PAGE == 775 /* Baltic */
#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 PF_CODE_PAGE == 850 /* Latin 1 */
#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif PF_CODE_PAGE == 852 /* Latin 2 */
#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,0xAC, \
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 PF_CODE_PAGE == 855 /* Cyrillic */
#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 PF_CODE_PAGE == 857 /* Turkish */
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,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,0xAD,0xAE,0xAF, \
0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
#elif PF_CODE_PAGE == 860 /* Portuguese */
#define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,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 PF_CODE_PAGE == 861 /* Icelandic */
#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,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 PF_CODE_PAGE == 862 /* Hebrew */
#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,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 PF_CODE_PAGE == 863 /* Canadian French */
#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,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 PF_CODE_PAGE == 864 /* Arabic */
#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,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,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 PF_CODE_PAGE == 865 /* Nordic */
#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,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 PF_CODE_PAGE == 866 /* Russian */
#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, \
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif PF_CODE_PAGE == 869 /* Greek 2 */
#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,0x86,0x9C,0x8D,0x8F,0x90, \
0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,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, \
0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
#else
#error Unknown code page.
#endif
/* Character code support macros */
#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
#define IsLower(c) (((c)>='a')&&((c)<='z'))
#if PF_USE_LCC && !defined(_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) */
/*-----------------------------------------------------------------------*/
/* Load 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;
}
/*-----------------------------------------------------------------------*/
/* String functions */
/*-----------------------------------------------------------------------*/
/* Fill memory block */
static void mem_set (void* dst, int val, int cnt) {
char *d = (char*)dst;
while (cnt--) *d++ = (char)val;
}
/* Compare memory block */
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 PF_FS_FAT12
UINT wc, bc, ofs;
#endif
if (clst < 2 || clst >= fs->n_fatent) return 1; /* Range check */
switch (fs->fs_type) {
#if PF_FS_FAT12
case FS_FAT12 : {
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 PF_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 PF_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 || (PF_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 (PF_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) return FR_NO_FILE; /* Report EOT when index has reached 65535 */
if (!(i % 16)) { /* Sector changed? */
dj->sect++; /* Next sector */
if (dj->clust == 0) { /* Static table */
if (i >= fs->n_rootdir) return FR_NO_FILE; /* Report EOT when end of table */
}
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) return FR_NO_FILE; /* Report EOT when it reached end of dynamic table */
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)) break; /* Is it a valid entry? */
res = dir_next(dj); /* Next entry */
} while (res == FR_OK);
return res;
}
/*-----------------------------------------------------------------------*/
/* Read an object from the directory */
/*-----------------------------------------------------------------------*/
#if PF_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)) break; /* Is it a valid entry? */
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, d, ni, si, i, *sfn;
const char *p;
#if PF_USE_LCC && defined(_EXCVT)
static const BYTE cvt[] = _EXCVT;
#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 PF_USE_LCC && defined(_EXCVT)
if (c >= 0x80) c = cvt[c - 0x80]; /* To upper extended char (SBCS) */
#endif
if (IsDBCS1(c) && i < ni - 1) { /* DBC 1st byte? */
d = p[si++]; /* Get 2nd byte */
sfn[i++] = c;
sfn[i++] = d;
} else { /* Single byte code */
if (PF_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 PF_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 /* PF_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 (PF_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 (PF_FS_FAT12 && mclst < 0xFF7) fmt = FS_FAT12;
if (PF_FS_FAT16 && mclst >= 0xFF8 && mclst < 0xFFF7) fmt = FS_FAT16;
if (PF_FS_FAT32 && mclst >= 0xFFF7) fmt = FS_FAT32;
if (!fmt) return FR_NO_FILESYSTEM;
fs->fs_type = fmt;
if (_FS_32ONLY || (PF_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)) return FR_NO_FILE; /* It is a directory */
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 PF_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)) return FR_NOT_OPENED; /* Check if 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(rbuff, fs->dsect, (UINT)fs->fptr % 512, rcnt);
if (dr) ABORT(FR_DISK_ERR);
fs->fptr += rcnt; /* Advances file read pointer */
btr -= rcnt; *br += rcnt; /* Update read counter */
if (rbuff) rbuff += rcnt; /* Advances the data pointer if destination is memory */
}
return FR_OK;
}
#endif
/*-----------------------------------------------------------------------*/
/* Write File */
/*-----------------------------------------------------------------------*/
#if PF_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)) return FR_NOT_OPENED; /* Check if 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 currtent secter write operation */
fs->flag &= ~FA__WIP;
}
}
return FR_OK;
}
#endif
/*-----------------------------------------------------------------------*/
/* Seek File R/W Pointer */
/*-----------------------------------------------------------------------*/
#if PF_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)) return FR_NOT_OPENED; /* Check if 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 PF_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 /* PF_USE_DIR */