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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Björn Stenberg
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdbool.h>
#include "fat.h"
#include "dir.h"
#include "debug.h"
#define MAX_OPEN_DIRS 8
static DIR opendirs[MAX_OPEN_DIRS];
DIR* opendir(char* name)
{
char namecopy[MAX_PATH];
char* part;
char* end;
struct fat_direntry entry;
int dd;
/* find a free dir descriptor */
for ( dd=0; dd<MAX_OPEN_DIRS; dd++ )
if ( !opendirs[dd].busy )
break;
if ( dd == MAX_OPEN_DIRS ) {
DEBUGF("Too many dirs open\n");
errno = EMFILE;
return NULL;
}
opendirs[dd].busy = true;
if ( name[0] != '/' ) {
DEBUGF("Only absolute paths supported right now\n");
opendirs[dd].busy = false;
return NULL;
}
if ( fat_opendir(&(opendirs[dd].fatdir), 0) < 0 ) {
DEBUGF("Failed opening root dir\n");
opendirs[dd].busy = false;
return NULL;
}
strncpy(namecopy,name,sizeof(namecopy));
namecopy[sizeof(namecopy)-1] = 0;
for ( part = strtok_r(namecopy, "/", &end); part;
part = strtok_r(NULL, "/", &end)) {
/* scan dir for name */
while (1) {
if ((fat_getnext(&(opendirs[dd].fatdir),&entry) < 0) ||
(!entry.name[0])) {
opendirs[dd].busy = false;
return NULL;
}
if ( (entry.attr & FAT_ATTR_DIRECTORY) &&
(!strcasecmp(part, entry.name)) ) {
if ( fat_opendir(&(opendirs[dd].fatdir),
entry.firstcluster) < 0 ) {
DEBUGF("Failed opening dir '%s' (%d)\n",
part, entry.firstcluster);
opendirs[dd].busy = false;
return NULL;
}
break;
}
}
}
return &opendirs[dd];
}
int closedir(DIR* dir)
{
dir->busy=false;
return 0;
}
struct dirent* readdir(DIR* dir)
{
struct fat_direntry entry;
struct dirent* theent = &(dir->theent);
if (fat_getnext(&(dir->fatdir),&entry) < 0)
return NULL;
if ( !entry.name[0] )
return NULL;
strncpy(theent->d_name, entry.name, sizeof( theent->d_name ) );
theent->attribute = entry.attr;
theent->size = entry.filesize;
theent->startcluster = entry.firstcluster;
return theent;
}
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