EMILE/libblock/block_open.c
Laurent Vivier 9bd9755dbb Update email address
Signed-off-by: Laurent Vivier <Laurent@Vivier.EU>
2013-09-05 14:45:27 +02:00

54 lines
1018 B
C

/*
*
* (c) 2005 Laurent Vivier <Laurent@Vivier.EU>
*
*/
#include <stdlib.h>
#include "libblock.h"
#include "block.h"
#define NB_SECTORS (18*2)
/*
* path is "<first>,<size>"
* where <first> is the offset of the first byte to read on the device
* and <size> is the number of bytes to read then.
*/
stream_FILE *block_open(stream_VOLUME *volume, char *path)
{
block_FILE *block;
int blocksize = ((device_io_t*)volume)->get_blocksize(((device_io_t*)volume)->data);
int first, size;
first = strtol(path, &path, 0);
if ( (*path != ',') && (*path != 0) )
return NULL;
if (*path == ',')
{
path++;
size = strtol(path, &path, 0);
if (*path != 0)
return NULL;
}
else
size = -1;
block = (block_FILE *)malloc(sizeof(block_FILE) +
NB_SECTORS * blocksize);
if (block == NULL)
return NULL;
block->base = first;
block->offset = 0;
block->size = size;
block->device = (device_io_t*)volume;
block->current = -1;
block->buffer_size = NB_SECTORS;
return (stream_FILE*)block;
}