ocaml/otherlibs/unix/lseek.c

38 lines
1.2 KiB
C

/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
#include <mlvalues.h>
#include "unixsupport.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[Int_val(cmd)]);
if (ret == -1) uerror("lseek", Nothing);
return Val_long(ret);
}