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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgfortran/] [intrinsics/] [ctime.c] - Blame information for rev 775

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1 733 jeremybenn
/* 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 <stdlib.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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  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, &ltm))
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                         == 5,
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                         failed = localtime_r (timep, &ltm) == NULL,
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                         failed = localtime_r (timep, &ltm) != 0);
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  if (failed)
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    return 0;
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  return strftime (s, max, "%c", &ltm);
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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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  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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}
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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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  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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}
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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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  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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}
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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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