ocaml/otherlibs/unix/lseek.c

25 lines
471 B
C

#include <mlvalues.h>
#include "unix.h"
#ifdef HAS_UNISTD
#include <unistd.h>
#else
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
#endif
static int seek_command_table[] = {
SEEK_SET, SEEK_CUR, SEEK_END
};
value unix_lseek(fd, ofs, cmd) /* ML */
value fd, ofs, cmd;
{
long ret;
ret = lseek(Int_val(fd), Long_val(ofs),
seek_command_table[Tag_val(cmd)]);
if (ret == -1) uerror("lseek", Nothing);
return Val_long(ret);
}