58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* Implementation of the GERROR g77 intrinsic.
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Copyright (C) 2005-2020 Free Software Foundation, Inc.
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Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
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This file is part of the GNU Fortran runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#include <errno.h>
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#include <string.h>
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/* GERROR (MESSAGE), g77 intrinsic for retrieving the system error
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message corresponding to the last system error (C errno).
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CHARACTER(len=*), INTENT(OUT) :: MESSAGE */
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void PREFIX(gerror) (char *, gfc_charlen_type);
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export_proto_np(PREFIX(gerror));
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void
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PREFIX(gerror) (char * msg, gfc_charlen_type msg_len)
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{
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gfc_charlen_type p_len;
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char *p;
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p = gf_strerror (errno, msg, msg_len);
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p_len = strlen (p);
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/* The returned pointer p might or might not be the same as the msg
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argument. */
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if (p != msg)
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{
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if (msg_len < p_len)
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p_len = msg_len;
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memcpy (msg, p, p_len);
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}
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if (msg_len > p_len)
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memset (&msg[p_len], ' ', msg_len - p_len);
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}
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