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 /* Make sure we don't see here a macro.  */
  46 #undef ctime_r
  47
  48 static char *
  49 ctime_r (const time_t * timep, char * buf __attribute__((unused)))
  50 {
  51 #ifdef HAVE_CTIME
  52   char *tmp = ctime (timep);
  53   if (tmp)
  54     tmp = strcpy (buf, tmp);
  55   return tmp;
  56 #else
  57   return NULL;
  58 #endif
  59 }
  60 #endif
  61
  62 /* ctime_r() buffer size needs to be at least 26 bytes.  */
  63 #define CSZ 26
  64
  65 extern void fdate (char **, gfc_charlen_type *);
  66 export_proto(fdate);
  67
  68 void
  69 fdate (char ** date, gfc_charlen_type * date_len)
  70 {
  71 #if defined(HAVE_TIME) && defined(HAVE_CTIME)
  72   char cbuf[CSZ];
  73   int i;
  74   time_t now = time(NULL);
  75   *date = ctime_r (&now, cbuf);
  76   if (*date != NULL)
  77     {
  78       *date = strdup (*date);
  79       *date_len = strlen (*date);
  80
  81       i = 0;
  82       while ((*date)[i])
  83        {
  84          if ((*date)[i] == '\n')
  85            (*date)[i] = ' ';
  86          i++;
  87        }
  88       return;
  89     }
  90 #endif
  91
  92   *date = NULL;
  93   *date_len = 0;
  94 }
  95
  96
  97 extern void fdate_sub (char *, gfc_charlen_type);
  98 export_proto(fdate_sub);
  99
 100 void
 101 fdate_sub (char * date, gfc_charlen_type date_len)
 102 {
 103 #if defined(HAVE_TIME) && defined(HAVE_CTIME)
 104   char cbuf[CSZ];
 105   int i;
 106   char *d;
 107   time_t now = time(NULL);
 108 #endif
 109
 110   memset (date, ' ', date_len);
 111 #if defined(HAVE_TIME) && defined(HAVE_CTIME)
 112   d = ctime_r (&now, cbuf);
 113   if (d != NULL)
 114     {
 115       i = 0;
 116       while (*d && *d != '\n' && i < date_len)
 117        date[i++] = *(d++);
 118     }
 119 #endif
 120 }
 121
 122
 123
 124 extern void PREFIX(ctime) (char **, gfc_charlen_type *, GFC_INTEGER_8);
 125 export_proto_np(PREFIX(ctime));
 126
 127 void
 128 PREFIX(ctime) (char ** date, gfc_charlen_type * date_len, GFC_INTEGER_8 t)
 129 {
 130 #if defined(HAVE_CTIME)
 131   char cbuf[CSZ];
 132   time_t now = t;
 133   int i;
 134   *date = ctime_r (&now, cbuf);
 135   if (*date != NULL)
 136     {
 137       *date = strdup (*date);
 138       *date_len = strlen (*date);
 139
 140       i = 0;
 141       while ((*date)[i])
 142        {
 143          if ((*date)[i] == '\n')
 144            (*date)[i] = ' ';
 145          i++;
 146        }
 147       return;
 148     }
 149 #endif
 150
 151   *date = NULL;
 152   *date_len = 0;
 153 }
 154
 155
 156 extern void ctime_sub (GFC_INTEGER_8 *, char *, gfc_charlen_type);
 157 export_proto(ctime_sub);
 158
 159 void
 160 ctime_sub (GFC_INTEGER_8 * t, char * date, gfc_charlen_type date_len)
 161 {
 162 #if defined(HAVE_CTIME)
 163   char cbuf[CSZ];
 164   int i;
 165   char *d;
 166   time_t now = *t;
 167 #endif
 168
 169   memset (date, ' ', date_len);
 170 #if defined(HAVE_CTIME)
 171   d = ctime_r (&now, cbuf);
 172   if (d != NULL)
 173     {
 174       i = 0;
 175       while (*d && *d != '\n' && i < date_len)
 176        date[i++] = *(d++);
 177     }
 178 #endif
 179 }