fat_dentry.h

/*
 * 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.
 */

#ifndef FAT_FAT_DENTRY_H_
#define FAT_FAT_DENTRY_H_

#include <stdint.h>
#include <bool.h>

#define FAT_NAME_LEN            8
#define FAT_EXT_LEN             3

#define FAT_NAME_DOT            ".       "
#define FAT_NAME_DOT_DOT        "..      "
#define FAT_EXT_PAD             "   "

#define FAT_ATTR_RDONLY         (1 << 0)
#define FAT_ATTR_VOLLABEL       (1 << 3)
#define FAT_ATTR_SUBDIR         (1 << 4)

#define FAT_LCASE_LOWER_NAME    0x08
#define FAT_LCASE_LOWER_EXT     0x10

#define FAT_PAD                 ' ' 

#define FAT_DENTRY_UNUSED       0x00
#define FAT_DENTRY_E5_ESC       0x05
#define FAT_DENTRY_DOT          0x2e
#define FAT_DENTRY_ERASED       0xe5

typedef enum {
        FAT_DENTRY_SKIP,
        FAT_DENTRY_LAST,
        FAT_DENTRY_FREE,
        FAT_DENTRY_VALID
} fat_dentry_clsf_t;

typedef struct {
        uint8_t         name[8];
        uint8_t         ext[3];
        uint8_t         attr;
        uint8_t         lcase;
        uint8_t         ctime_fine;
        uint16_t        ctime;
        uint16_t        cdate;
        uint16_t        adate;
        union {
                uint16_t        eaidx;          /* FAT12/FAT16 */
                uint16_t        firstc_hi;      /* FAT32 */
        } __attribute__ ((packed));
        uint16_t        mtime;
        uint16_t        mdate;
        union {
                uint16_t        firstc;         /* FAT12/FAT16 */
                uint16_t        firstc_lo;      /* FAT32 */
        } __attribute__ ((packed));
        uint32_t        size;
} __attribute__ ((packed)) fat_dentry_t;

extern int fat_dentry_namecmp(char *, const char *);
extern bool fat_dentry_name_verify(const char *);
extern void fat_dentry_name_get(const fat_dentry_t *, char *);
extern void fat_dentry_name_set(fat_dentry_t *, const char *);
extern fat_dentry_clsf_t fat_classify_dentry(const fat_dentry_t *);

#endif

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