130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/* Implementation of the CTIME and FDATE g77 intrinsics.
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Copyright (C) 2005, 2007, 2009, 2011 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 "time_1.h"
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#include <string.h>
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/* strftime-like function that fills a C string with %c format which
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is identical to ctime in the default locale. As ctime and ctime_r
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are poorly specified and their usage not recommended, the
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implementation instead uses strftime. */
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static size_t
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strctime (char *s, size_t max, const time_t *timep)
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{
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#ifdef HAVE_STRFTIME
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struct tm ltm;
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int failed;
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/* Some targets provide a localtime_r based on a draft of the POSIX
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standard where the return type is int rather than the
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standardized struct tm*. */
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__builtin_choose_expr (__builtin_classify_type (localtime_r (timep, <m))
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== 5,
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failed = localtime_r (timep, <m) == NULL,
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failed = localtime_r (timep, <m) != 0);
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if (failed)
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return 0;
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return strftime (s, max, "%c", <m);
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#else
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return 0;
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#endif
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}
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/* In the default locale, the date and time representation fits in 26
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bytes. However, other locales might need more space. */
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#define CSZ 100
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extern void fdate (char **, gfc_charlen_type *);
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export_proto(fdate);
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void
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fdate (char ** date, gfc_charlen_type * date_len)
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{
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#if defined(HAVE_TIME)
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time_t now = time(NULL);
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*date = get_mem (CSZ);
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*date_len = strctime (*date, CSZ, &now);
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#else
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*date = NULL;
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*date_len = 0;
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#endif
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}
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extern void fdate_sub (char *, gfc_charlen_type);
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export_proto(fdate_sub);
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void
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fdate_sub (char * date, gfc_charlen_type date_len)
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{
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#if defined(HAVE_TIME)
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time_t now = time(NULL);
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char *s = get_mem (date_len + 1);
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size_t n = strctime (s, date_len + 1, &now);
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fstrcpy (date, date_len, s, n);
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free (s);
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#else
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memset (date, ' ', date_len);
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#endif
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}
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extern void PREFIX(ctime) (char **, gfc_charlen_type *, GFC_INTEGER_8);
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export_proto_np(PREFIX(ctime));
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void
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PREFIX(ctime) (char ** date, gfc_charlen_type * date_len, GFC_INTEGER_8 t)
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{
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#if defined(HAVE_TIME)
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time_t now = t;
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*date = get_mem (CSZ);
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*date_len = strctime (*date, CSZ, &now);
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#else
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*date = NULL;
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*date_len = 0;
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#endif
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}
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extern void ctime_sub (GFC_INTEGER_8 *, char *, gfc_charlen_type);
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export_proto(ctime_sub);
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void
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ctime_sub (GFC_INTEGER_8 * t, char * date, gfc_charlen_type date_len)
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{
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time_t now = *t;
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char *s = get_mem (date_len + 1);
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size_t n = strctime (s, date_len + 1, &now);
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fstrcpy (date, date_len, s, n);
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free (s);
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}
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