EMILE/libcontainer/container_lseek.c

37 lines
533 B
C

/*
*
* (c) 2005 Laurent Vivier <Laurent@Vivier.EU>
*
*/
#include <sys/types.h>
#include <unistd.h>
#include "libcontainer.h"
#include "container.h"
int container_lseek(stream_FILE *_file, off_t offset, int whence)
{
container_FILE *file = (container_FILE*)_file;
long new_offset;
switch(whence)
{
case SEEK_SET:
new_offset = offset;
break;
case SEEK_CUR:
new_offset = file->offset + offset;
break;
default:
return -1;
}
if (new_offset < 0)
return -1;
file->offset = new_offset;
return new_offset;
}