58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/***********************************************************************/
|
|
/* */
|
|
/* Objective Caml */
|
|
/* */
|
|
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
|
|
/* */
|
|
/* Copyright 1996 Institut National de Recherche en Informatique et */
|
|
/* en Automatique. All rights reserved. This file is distributed */
|
|
/* under the terms of the GNU Library General Public License, with */
|
|
/* the special exception on linking described in file ../../LICENSE. */
|
|
/* */
|
|
/***********************************************************************/
|
|
|
|
/* $Id$ */
|
|
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <mlvalues.h>
|
|
#include <alloc.h>
|
|
#include <io.h>
|
|
#include "unixsupport.h"
|
|
|
|
#ifdef HAS_UNISTD
|
|
#include <unistd.h>
|
|
#else
|
|
#define SEEK_SET 0
|
|
#define SEEK_CUR 1
|
|
#define SEEK_END 2
|
|
#endif
|
|
|
|
#ifndef EOVERFLOW
|
|
#define EOVERFLOW ERANGE
|
|
#endif
|
|
|
|
static int seek_command_table[] = {
|
|
SEEK_SET, SEEK_CUR, SEEK_END
|
|
};
|
|
|
|
CAMLprim value unix_lseek(value fd, value ofs, value cmd)
|
|
{
|
|
file_offset ret;
|
|
ret = lseek(Int_val(fd), Long_val(ofs),
|
|
seek_command_table[Int_val(cmd)]);
|
|
if (ret == -1) uerror("lseek", Nothing);
|
|
if (ret > Max_long) unix_error(EOVERFLOW, "lseek", Nothing);
|
|
return Val_long(ret);
|
|
}
|
|
|
|
CAMLprim value unix_lseek_64(value fd, value ofs, value cmd)
|
|
{
|
|
file_offset ret;
|
|
ret = lseek(Int_val(fd), File_offset_val(ofs),
|
|
seek_command_table[Int_val(cmd)]);
|
|
if (ret == -1) uerror("lseek", Nothing);
|
|
return Val_file_offset(ret);
|
|
}
|
|
|