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/* Implementation of the GERROR g77 intrinsic.
Copyright (C) 2005-2021 Free Software Foundation, Inc.
Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <errno.h>
#include <string.h>
/* GERROR (MESSAGE), g77 intrinsic for retrieving the system error
message corresponding to the last system error (C errno).
CHARACTER(len=*), INTENT(OUT) :: MESSAGE */
void PREFIX(gerror) (char *, gfc_charlen_type);
export_proto_np(PREFIX(gerror));
void
PREFIX(gerror) (char * msg, gfc_charlen_type msg_len)
{
gfc_charlen_type p_len;
char *p;
p = gf_strerror (errno, msg, msg_len);
p_len = strlen (p);
/* The returned pointer p might or might not be the same as the msg
argument. */
if (p != msg)
{
if (msg_len < p_len)
p_len = msg_len;
memcpy (msg, p, p_len);
}
if (msg_len > p_len)
memset (&msg[p_len], ' ', msg_len - p_len);
}
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