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/*
*
* (c) 2005-2009 Laurent Vivier <Laurent@vivier.eu>
*
* This file has been copied from EMILE, http://emile.sf.net
*
*/
#include "libiso9660.h"
#include "libopenbios/bindings.h"
#include "libc/diskio.h"
#define offsetof(t,m) ((long)&(((t *)0)->m))
static void read_extent(iso9660_DIR *dir)
{
seek_io(dir->volume->fd, dir->extent * ISOFS_BLOCK_SIZE);
read_io(dir->volume->fd, dir->buffer, ISOFS_BLOCK_SIZE);
dir->len -= ISOFS_BLOCK_SIZE;
dir->extent ++;
dir->index = 0;
}
struct iso_directory_record *iso9660_readdir(iso9660_DIR *dir)
{
struct iso_directory_record *idr;
if (dir->index >
ISOFS_BLOCK_SIZE - offsetof(struct iso_directory_record, name[0]))
{
if (dir->len <= 0)
return NULL;
read_extent(dir);
}
idr = (struct iso_directory_record *) &dir->buffer[dir->index];
if (idr->length[0] == 0) {
if (dir->len <= 0)
return NULL;
read_extent(dir);
idr = (struct iso_directory_record *) &dir->buffer[dir->index];
}
dir->index += dir->buffer[dir->index];
return idr;
}
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