📄 tff.c
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*nclust = n;
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Delete a File or Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_unlink (
const char *path /* Pointer to the file or directory path */
)
{
FRESULT res;
DIR dj;
BYTE *dir, *sdir;
DWORD dsect;
char fn[8+3+1];
CLUST dclust;
res = auto_mount(&path, 1);
if (res != FR_OK) return res;
res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
if (res != FR_OK) return res; /* Trace failed */
if (!dir) return FR_INVALID_NAME; /* It is the root directory */
if (dir[DIR_Attr] & AM_RDO) return FR_DENIED; /* It is a R/O object */
dsect = dj.fs->winsect;
dclust =
#if _FAT32
((DWORD)LD_WORD(&dir[DIR_FstClusHI]) << 16) |
#endif
LD_WORD(&dir[DIR_FstClusLO]);
if (dir[DIR_Attr] & AM_DIR) { /* It is a sub-directory */
dj.clust = dclust; /* Check if the sub-dir is empty or not */
dj.sect = clust2sect(dclust);
dj.index = 2;
do {
if (!move_window(dj.sect)) return FR_RW_ERROR;
sdir = &dj.fs->win[(dj.index & 15) * 32];
if (sdir[DIR_Name] == 0) break;
if (sdir[DIR_Name] != 0xE5 && !(sdir[DIR_Attr] & AM_VOL))
return FR_DENIED; /* The directory is not empty */
} while (next_dir_entry(&dj));
}
if (!move_window(dsect)) return FR_RW_ERROR; /* Mark the directory entry 'deleted' */
dir[DIR_Name] = 0xE5;
dj.fs->winflag = 1;
if (!remove_chain(dclust)) return FR_RW_ERROR; /* Remove the cluster chain */
return sync();
}
/*-----------------------------------------------------------------------*/
/* Create a Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_mkdir (
const char *path /* Pointer to the directory path */
)
{
FRESULT res;
DIR dj;
BYTE *dir, *fw, n;
char fn[8+3+1];
DWORD sect, dsect, tim;
CLUST dclust, pclust;
res = auto_mount(&path, 1);
if (res != FR_OK) return res;
res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
if (res == FR_OK) return FR_EXIST; /* Any file or directory is already existing */
if (res != FR_NO_FILE) return res;
res = reserve_direntry(&dj, &dir); /* Reserve a directory entry */
if (res != FR_OK) return res;
sect = dj.fs->winsect;
dclust = create_chain(0); /* Allocate a cluster for new directory table */
if (dclust == 1) return FR_RW_ERROR;
dsect = clust2sect(dclust);
if (!dsect) return FR_DENIED;
if (!move_window(dsect)) return FR_RW_ERROR;
fw = dj.fs->win;
memset(fw, 0, 512U); /* Clear the directory table */
for (n = 1; n < dj.fs->csize; n++) {
if (disk_write(0, fw, ++dsect, 1) != RES_OK)
return FR_RW_ERROR;
}
memset(&fw[DIR_Name], ' ', 8+3); /* Create "." entry */
fw[DIR_Name] = '.';
fw[DIR_Attr] = AM_DIR;
tim = get_fattime();
ST_DWORD(&fw[DIR_WrtTime], tim);
memcpy(&fw[32], &fw[0], 32); fw[33] = '.'; /* Create ".." entry */
pclust = dj.sclust;
#if _FAT32
ST_WORD(&fw[ DIR_FstClusHI], dclust >> 16);
if (dj.fs->fs_type == FS_FAT32 && pclust == dj.fs->dirbase) pclust = 0;
ST_WORD(&fw[32+DIR_FstClusHI], pclust >> 16);
#endif
ST_WORD(&fw[ DIR_FstClusLO], dclust);
ST_WORD(&fw[32+DIR_FstClusLO], pclust);
dj.fs->winflag = 1;
if (!move_window(sect)) return FR_RW_ERROR;
memset(&dir[0], 0, 32); /* Clean-up the new entry */
memcpy(&dir[DIR_Name], fn, 8+3); /* Name */
dir[DIR_NTres] = fn[11];
dir[DIR_Attr] = AM_DIR; /* Attribute */
ST_DWORD(&dir[DIR_WrtTime], tim); /* Crated time */
ST_WORD(&dir[DIR_FstClusLO], dclust); /* Table start cluster */
#if _FAT32
ST_WORD(&dir[DIR_FstClusHI], dclust >> 16);
#endif
return sync();
}
/*-----------------------------------------------------------------------*/
/* Change File Attribute */
/*-----------------------------------------------------------------------*/
FRESULT f_chmod (
const char *path, /* Pointer to the file path */
BYTE value, /* Attribute bits */
BYTE mask /* Attribute mask to change */
)
{
FRESULT res;
DIR dj;
BYTE *dir;
char fn[8+3+1];
res = auto_mount(&path, 1);
if (res == FR_OK) {
res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
if (res == FR_OK) { /* Trace completed */
if (!dir) {
res = FR_INVALID_NAME; /* Root directory */
} else {
mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
res = sync();
}
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Change Timestamp */
/*-----------------------------------------------------------------------*/
FRESULT f_utime (
const char *path, /* Pointer to the file/directory name */
const FILINFO *finfo /* Pointer to the timestamp to be set */
)
{
FRESULT res;
DIR dj;
BYTE *dir;
char fn[8+3+1];
res = auto_mount(&path, 1);
if (res == FR_OK) {
res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
if (res == FR_OK) { /* Trace completed */
if (!dir) {
res = FR_INVALID_NAME; /* Root directory */
} else {
ST_WORD(&dir[DIR_WrtTime], finfo->ftime);
ST_WORD(&dir[DIR_WrtDate], finfo->fdate);
res = sync();
}
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Rename File/Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_rename (
const char *path_old, /* Pointer to the old name */
const char *path_new /* Pointer to the new name */
)
{
FRESULT res;
DWORD sect_old;
BYTE *dir_old, *dir_new, direntry[32-11];
DIR dj;
char fn[8+3+1];
res = auto_mount(&path_old, 1);
if (res != FR_OK) return res;
res = trace_path(&dj, fn, path_old, &dir_old); /* Check old object */
if (res != FR_OK) return res; /* The old object is not found */
if (!dir_old) return FR_NO_FILE;
sect_old = dj.fs->winsect; /* Save the object information */
memcpy(direntry, &dir_old[DIR_Attr], 32-11);
res = trace_path(&dj, fn, path_new, &dir_new); /* Check new object */
if (res == FR_OK) return FR_EXIST; /* The new object name is already existing */
if (res != FR_NO_FILE) return res; /* Is there no old name? */
res = reserve_direntry(&dj, &dir_new); /* Reserve a directory entry */
if (res != FR_OK) return res;
memcpy(&dir_new[DIR_Attr], direntry, 32-11); /* Create new entry */
memcpy(&dir_new[DIR_Name], fn, 8+3);
dir_new[DIR_NTres] = fn[11];
dj.fs->winflag = 1;
if (!move_window(sect_old)) return FR_RW_ERROR; /* Delete old entry */
dir_old[DIR_Name] = 0xE5;
return sync();
}
#endif /* !_FS_READONLY */
#endif /* _FS_MINIMIZE == 0 */
#endif /* _FS_MINIMIZE <= 1 */
#endif /* _FS_MINIMIZE <= 2 */
#if _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 btr, /* Number of bytes to forward */
UINT *br /* Pointer to number of bytes forwarded */
)
{
FRESULT res;
DWORD remain;
UINT rcnt;
CLUST clust;
*br = 0;
res = validate(fp->fs, fp->id); /* Check validity of the object */
if (res != FR_OK) return res;
if (fp->flag & FA__ERROR) return FR_RW_ERROR; /* Check error flag */
if (!(fp->flag & FA_READ)) return FR_DENIED; /* Check access mode */
remain = fp->fsize - fp->fptr;
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
for ( ; btr && (*func)(NULL, 0); /* Repeat until all data transferred */
fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
if ((fp->fptr % 512U) == 0) { /* On the sector boundary? */
if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
clust = (fp->fptr == 0) ? /* On the top of the file? */
fp->org_clust : get_cluster(fp->curr_clust);
if (clust < 2 || clust >= fp->fs->max_clust) goto ff_error;
fp->curr_clust = clust; /* Update current cluster */
fp->csect = 0; /* Reset sector address in the cluster */
}
fp->csect++; /* Next sector address in the cluster */
}
if (!move_window(clust2sect(fp->curr_clust) + fp->csect - 1)) /* Move sector window */
goto ff_error;
rcnt = 512U - (WORD)(fp->fptr % 512U); /* Forward data from sector window */
if (rcnt > btr) rcnt = btr;
rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % 512U], rcnt);
if (rcnt == 0) goto ff_error;
}
return FR_OK;
ff_error: /* Abort this function due to an unrecoverable error */
fp->flag |= FA__ERROR;
return FR_RW_ERROR;
}
#endif /* _USE_FORWARD */
#if _USE_STRFUNC >= 1
/*-----------------------------------------------------------------------*/
/* Get a string from the file */
/*-----------------------------------------------------------------------*/
char* fgets (
char* buff, /* Pointer to the string buffer to read */
int len, /* Size of string buffer */
FIL* fil /* Pointer to the file object */
)
{
int i = 0;
char *p = buff;
UINT rc;
while (i < len - 1) { /* Read bytes until buffer gets filled */
f_read(fil, p, 1, &rc);
if (rc != 1) break; /* Break when no data to read */
#if _USE_STRFUNC >= 2
if (*p == '\r') continue; /* Strip '\r' */
#endif
i++;
if (*p++ == '\n') break; /* Break when reached end of line */
}
*p = 0;
return i ? buff : 0; /* When no data read (eof or error), return with error. */
}
#if !_FS_READONLY
#include <stdarg.h>
/*-----------------------------------------------------------------------*/
/* Put a character to the file */
/*-----------------------------------------------------------------------*/
int fputc (
int chr, /* A character to be output */
FIL* fil /* Ponter to the file object */
)
{
UINT bw;
char c;
#if _USE_STRFUNC >= 2
if (chr == '\n') fputc ('\r', fil); /* LF -> CRLF conversion */
#endif
if (!fil) { /* Special value may be used to switch the destination to any other device */
/* put_console(chr); */
return chr;
}
c = (char)chr;
f_write(fil, &c, 1, &bw); /* Write a byte to the file */
return bw ? chr : EOF; /* Return the resulut */
}
/*-----------------------------------------------------------------------*/
/* Put a string to the file */
/*-----------------------------------------------------------------------*/
int fputs (
const char* str, /* Pointer to the string to be output */
FIL* fil /* Pointer to the file object */
)
{
int n;
for (n = 0; *str; str++, n++) {
if (fputc(*str, fil) == EOF) return EOF;
}
return n;
}
/*-----------------------------------------------------------------------*/
/* Put a formatted string to the file */
/*-----------------------------------------------------------------------*/
int fprintf (
FIL* fil, /* Pointer to the file object */
const char* str, /* Pointer to the format string */
... /* Optional arguments... */
)
{
va_list arp;
UCHAR c, f, r;
ULONG val;
char s[16];
int i, w, res, cc;
va_start(arp, str);
for (cc = res = 0; cc != EOF; res += cc) {
c = *str++;
if (c == 0) break; /* End of string */
if (c != '%') { /* Non escape cahracter */
cc = fputc(c, fil);
if (cc != EOF) cc = 1;
continue;
}
w = f = 0;
c = *str++;
if (c == '0') { /* Flag: '0' padding */
f = 1; c = *str++;
}
while (c >= '0' && c <= '9') { /* Precision */
w = w * 10 + (c - '0');
c = *str++;
}
if (c == 'l') { /* Prefix: Size is long int */
f |= 2; c = *str++;
}
if (c == 's') { /* Type is string */
cc = fputs(va_arg(arp, char*), fil);
continue;
}
if (c == 'c') { /* Type is character */
cc = fputc(va_arg(arp, char), fil);
if (cc != EOF) cc = 1;
continue;
}
r = 0;
if (c == 'd') r = 10; /* Type is signed decimal */
if (c == 'u') r = 10; /* Type is unsigned decimal */
if (c == 'X') r = 16; /* Type is unsigned hexdecimal */
if (r == 0) break; /* Unknown type */
if (f & 2) { /* Get the value */
val = (ULONG)va_arg(arp, long);
} else {
val = (c == 'd') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int);
}
/* Put numeral string */
if (c == 'd') {
if (val >= 0x80000000) {
val = 0 - val;
f |= 4;
}
}
i = sizeof(s) - 1; s[i] = 0;
do {
c = (UCHAR)(val % r + '0');
if (c > '9') c += 7;
s[--i] = c;
val /= r;
} while (i && val);
if (i && (f & 4)) s[--i] = '-';
w = sizeof(s) - 1 - w;
while (i && i > w) s[--i] = (f & 1) ? '0' : ' ';
cc = fputs(&s[i], fil);
}
va_end(arp);
return (cc == EOF) ? cc : res;
}
#endif /* !_FS_READONLY */
#endif /* _USE_STRFUNC >= 1*/
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