| 35,7 → 35,66 |
|---|
| * @brief Functions that work with FAT directory entries. |
| */ |
| |
| #include "fat_dentry.h" |
| |
| #define FAT_PAD ' ' |
| |
| #define FAT_DENTRY_UNUSED 0x00 |
| #define FAT_DENTRY_E5_ESC 0x05 |
| #define FAT_DENTRY_DOT 0x2e |
| #define FAT_DENTRY_ERASED 0xe5 |
| |
| void dentry_name_canonify(fat_dentry_t *d, char *buf) |
| { |
| int i; |
| |
| for (i = 0; i < FAT_NAME_LEN; i++) { |
| if (d->name[i] == FAT_PAD) |
| break; |
| if (d->name[i] == FAT_DENTRY_E5_ESC) |
| *buf++ = 0xe5; |
| else |
| *buf++ = d->name[i]; |
| } |
| if (d->ext[0] != FAT_PAD) |
| *buf++ = '.'; |
| for (i = 0; i < FAT_EXT_LEN; i++) { |
| if (d->ext[i] == FAT_PAD) { |
| *buf = '\0'; |
| return; |
| } |
| if (d->ext[i] == FAT_DENTRY_E5_ESC) |
| *buf++ = 0xe5; |
| else |
| *buf++ = d->ext[i]; |
| } |
| *buf = '\0'; |
| } |
| |
| fat_dentry_clsf_t fat_classify_dentry(fat_dentry_t *d) |
| { |
| if (d->attr & FAT_ATTR_VOLLABEL) { |
| /* volume label entry */ |
| return FAT_DENTRY_SKIP; |
| } |
| if (d->name[0] == FAT_DENTRY_ERASED) { |
| /* not-currently-used entry */ |
| return FAT_DENTRY_SKIP; |
| } |
| if (d->name[0] == FAT_DENTRY_UNUSED) { |
| /* never used entry */ |
| return FAT_DENTRY_LAST; |
| } |
| if (d->name[0] == FAT_DENTRY_DOT) { |
| /* |
| * Most likely '.' or '..'. |
| * It cannot occur in a regular file name. |
| */ |
| return FAT_DENTRY_SKIP; |
| } |
| return FAT_DENTRY_VALID; |
| } |
| |
| /** |
| * @} |
| */ |