| 0,0 → 1,100 |
|---|
| /* |
| * Copyright (c) 2008 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup fs |
| * @{ |
| */ |
| |
| /** |
| * @file fat_dentry.c |
| * @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; |
| } |
| |
| /** |
| * @} |
| */ |