source/libs/poppler/poppler-src/poppler/DateInfo.cc

   1 //========================================================================
   2 //
   3 // DateInfo.cc
   4 //
   5 // Copyright (C) 2008 Albert Astals Cid <aacid@kde.org>
   6 // Copyright (C) 2009 Carlos Garcia Campos <carlosgc@gnome.org>
   7 //
   8 // To see a description of the changes please see the Changelog file that
   9 // came with your tarball or type make ChangeLog if you are building from git
  10 //
  11 //========================================================================
  12
  13 //========================================================================
  14 //
  15 // Based on code from pdfinfo.cc
  16 //
  17 // Copyright 1998-2003 Glyph & Cog, LLC
  18 //
  19 //========================================================================
  20
  21 #include <config.h>
  22
  23 #include "DateInfo.h"
  24
  25 #include <stdio.h>
  26 #include <string.h>
  27
  28 /* See PDF Reference 1.3, Section 3.8.2 for PDF Date representation */
  29 GBool parseDateString(const char *dateString, int *year, int *month, int *day, int *hour, int *minute, int *second, char *tz, int *tzHour, int *tzMinute)
  30 {
  31     if ( dateString == NULL ) return gFalse;
  32     if ( strlen(dateString) < 2 ) return gFalse;
  33
  34     if ( dateString[0] == 'D' && dateString[1] == ':' )
  35         dateString += 2;
  36
  37     *month = 1;
  38     *day = 1;
  39     *hour = 0;
  40     *minute = 0;
  41     *second = 0;
  42     *tz = 0x00;
  43     *tzHour = 0;
  44     *tzMinute = 0;
  45
  46     if ( sscanf( dateString,
  47                  "%4d%2d%2d%2d%2d%2d%c%2d%*c%2d",
  48                  year, month, day, hour, minute, second,
  49                  tz, tzHour, tzMinute ) > 0 ) {
  50         /* Workaround for y2k bug in Distiller 3 stolen from gpdf, hoping that it won't
  51         * be used after y2.2k */
  52         if ( *year < 1930 && strlen (dateString) > 14)
  53         {
  54            int century, years_since_1900;
  55            if ( sscanf( dateString,
  56                         "%2d%3d%2d%2d%2d%2d%2d",
  57                         &century, &years_since_1900, month, day, hour, minute, second) == 7 )
  58            {
  59                *year = century * 100 + years_since_1900;
  60            }
  61            else
  62            {
  63                return gFalse;
  64            }
  65        }
  66
  67        if (*year <= 0) return gFalse;
  68
  69        return gTrue;
  70    }
  71
  72    return gFalse;
  73 }
  74
  75
  76 GooString *timeToDateString(time_t *timet) {
  77   GooString *dateString;
  78   char s[5];
  79   struct tm *gt;
  80   size_t len;
  81   time_t timep = timet ? *timet : time(NULL);
  82
  83 #ifdef HAVE_GMTIME_R
  84   struct tm t;
  85   gt = gmtime_r (&timep, &t);
  86 #else
  87   gt = gmtime (&timep);
  88 #endif
  89
  90   dateString = new GooString ("D:");
  91
  92   /* Year YYYY */
  93   len = strftime (s, sizeof(s), "%Y", gt);
  94   dateString->append (s, len);
  95
  96   /* Month MM */
  97   len = strftime (s, sizeof(s), "%m", gt);
  98   dateString->append (s, len);
  99
 100   /* Day DD */
 101   len = strftime (s, sizeof(s), "%d", gt);
 102   dateString->append (s, len);
 103
 104   /* Hour HH */
 105   len = strftime (s, sizeof(s), "%H", gt);
 106   dateString->append (s, len);
 107
 108   /* Minute mm */
 109   len = strftime (s, sizeof(s), "%M", gt);
 110   dateString->append (s, len);
 111
 112   /* Second SS */
 113   len = strftime (s, sizeof(s), "%S", gt);
 114   dateString->append (s, len);
 115
 116   return dateString;
 117 }
 118