/*
* Copyright (c) 2005-2008, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <prex/prex.h>
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include "fatfs.h"
/*
* Convert file name to 8.3 format
* Ex. "foo.bar" => "foo bar"
*/
void
fat_convert_name(char *org, char *name)
{
int i;
memset(name, (int)' ', 11);
for (i = 0; i <= 11; i++) {
if (!*org)
break;
if (*org == '/')
break;
if (*org == '.') {
i = 7;
org++;
continue;
}
*(name + i) = *org;
org++;
}
}
/*
* Restore file name to normal format
* Ex. "foo bar" => "foo.bar"
*/
void
fat_restore_name(char *org, char *name)
{
int i;
memset(name, 0, 13);
for (i = 0; i < 8; i++) {
if (*org != ' ')
*name++ = *org;
org++;
}
if (*org != ' ')
*name++ = '.';
for (i = 0; i < 3; i++) {
if (*org != ' ')
*name++ = *org;
org++;
}
}
/*
* Compare 2 file names.
*
* Return 0 if it matches.
*/
int
fat_compare_name(char *n1, char *n2)
{
int i;
for (i = 0; i < 11; i++, n1++, n2++) {
if (toupper((int)*n1) != toupper((int)*n2))
return -1;
}
return 0;
}
/*
* Check specified name is valid as FAT file name.
* Return true if valid.
*/
int
fat_valid_name(char *name)
{
static char invalid_char[] = "*?<>|\"+=,;[] \345";
int len = 0;
/* . or .. */
if (*name == '.') {
name++;
if (*name == '.')
name++;
return (*(name + 1) == '\0') ? 1 : 0;
}
/* First char must be alphabet or numeric */
if (!isalnum((int)*name))
return 0;
while (*name != '\0') {
if (strchr(invalid_char, *name))
return 0;
if (*name == '.')
break; /* Start of extension */
if (++len > 8)
return 0; /* Too long name */
name++;
}
if (*name == '\0')
return 1;
name++;
if (*name == '\0') /* Empty extension */
return 1;
len = 0;
while (*name != '\0') {
if (strchr(invalid_char, *name))
return 0;
if (*name == '.')
return 0; /* Second extention */
if (++len > 3)
return 0; /* Too long name */
name++;
}
return 1;
}
/*
* mode -> attribute
*/
void
fat_mode_to_attr(mode_t mode, u_char *attr)
{
*attr = 0;
if (!(mode & S_IWRITE))
*attr |= FA_RDONLY;
if (!(mode & S_IREAD))
*attr |= FA_HIDDEN;
if (S_ISDIR(mode))
*attr |= FA_SUBDIR;
}
/*
* attribute -> mode
*/
void
fat_attr_to_mode(u_char attr, mode_t *mode)
{
if (attr & FA_RDONLY)
*mode =
S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH |
S_IXOTH;
else
*mode = S_IRWXU | S_IRWXG | S_IRWXO;
if (attr & FA_SUBDIR)
*mode |= S_IFDIR;
else
*mode |= S_IFREG;
}