libgfortran/intrinsics/ctime.c

   1 /* Implementation of the CTIME and FDATE g77 intrinsics.
   2    Copyright (C) 2005, 2007, 2009, 2011 Free Software Foundation, Inc.
   3    Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
   4
   5 This file is part of the GNU Fortran runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public
   9 License as published by the Free Software Foundation; either
  10 version 3 of the License, or (at your option) any later version.
  11
  12 Libgfortran is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #include "libgfortran.h"
  27
  28 #ifdef TIME_WITH_SYS_TIME
  29 #  include <sys/time.h>
  30 #  include <time.h>
  31 #else
  32 #  if HAVE_SYS_TIME_H
  33 #    include <sys/time.h>
  34 #  else
  35 #    ifdef HAVE_TIME_H
  36 #      include <time.h>
  37 #    endif
  38 #  endif
  39 #endif
  40
  41 #include <string.h>
  42
  43
  44 #ifndef HAVE_CTIME_R
  45 static char *
  46 ctime_r (const time_t * timep, char * buf __attribute__((unused)))
  47 {
  48 #ifdef HAVE_CTIME
  49   return ctime (timep);
  50 #else
  51   return NULL;
  52 #endif
  53 }
  54 #endif
  55
  56 /* ctime_r() buffer size needs to be at least 26 bytes.  */
  57 #define CSZ 26
  58
  59 extern void fdate (char **, gfc_charlen_type *);
  60 export_proto(fdate);
  61
  62 void
  63 fdate (char ** date, gfc_charlen_type * date_len)
  64 {
  65 #if defined(HAVE_TIME) && defined(HAVE_CTIME)
  66   char cbuf[CSZ];
  67   int i;
  68   time_t now = time(NULL);
  69   *date = ctime_r (&now, cbuf);
  70   if (*date != NULL)
  71     {
  72       *date = strdup (*date);
  73       *date_len = strlen (*date);
  74
  75       i = 0;
  76       while ((*date)[i])
  77        {
  78          if ((*date)[i] == '\n')
  79            (*date)[i] = ' ';
  80          i++;
  81        }
  82       return;
  83     }
  84 #endif
  85
  86   *date = NULL;
  87   *date_len = 0;
  88 }
  89
  90
  91 extern void fdate_sub (char *, gfc_charlen_type);
  92 export_proto(fdate_sub);
  93
  94 void
  95 fdate_sub (char * date, gfc_charlen_type date_len)
  96 {
  97 #if defined(HAVE_TIME) && defined(HAVE_CTIME)
  98   char cbuf[CSZ];
  99   int i;
 100   char *d;
 101   time_t now = time(NULL);
 102 #endif
 103
 104   memset (date, ' ', date_len);
 105 #if defined(HAVE_TIME) && defined(HAVE_CTIME)
 106   d = ctime_r (&now, cbuf);
 107   if (d != NULL)
 108     {
 109       i = 0;
 110       while (*d && *d != '\n' && i < date_len)
 111        date[i++] = *(d++);
 112     }
 113 #endif
 114 }
 115
 116
 117
 118 extern void PREFIX(ctime) (char **, gfc_charlen_type *, GFC_INTEGER_8);
 119 export_proto_np(PREFIX(ctime));
 120
 121 void
 122 PREFIX(ctime) (char ** date, gfc_charlen_type * date_len, GFC_INTEGER_8 t)
 123 {
 124 #if defined(HAVE_CTIME)
 125   char cbuf[CSZ];
 126   time_t now = t;
 127   int i;
 128   *date = ctime_r (&now, cbuf);
 129   if (*date != NULL)
 130     {
 131       *date = strdup (*date);
 132       *date_len = strlen (*date);
 133
 134       i = 0;
 135       while ((*date)[i])
 136        {
 137          if ((*date)[i] == '\n')
 138            (*date)[i] = ' ';
 139          i++;
 140        }
 141       return;
 142     }
 143 #endif
 144
 145   *date = NULL;
 146   *date_len = 0;
 147 }
 148
 149
 150 extern void ctime_sub (GFC_INTEGER_8 *, char *, gfc_charlen_type);
 151 export_proto(ctime_sub);
 152
 153 void
 154 ctime_sub (GFC_INTEGER_8 * t, char * date, gfc_charlen_type date_len)
 155 {
 156 #if defined(HAVE_CTIME)
 157   char cbuf[CSZ];
 158   int i;
 159   char *d;
 160   time_t now = *t;
 161 #endif
 162
 163   memset (date, ' ', date_len);
 164 #if defined(HAVE_CTIME)
 165   d = ctime_r (&now, cbuf);
 166   if (d != NULL)
 167     {
 168       i = 0;
 169       while (*d && *d != '\n' && i < date_len)
 170        date[i++] = *(d++);
 171     }
 172 #endif
 173 }