pith/adjtime.c

   1 #if !defined(lint) && !defined(DOS)
   2 static char rcsid[] = "$Id: adjtime.c 761 2007-10-23 22:35:18Z hubert@u.washington.edu $";
   3 #endif
   4
   5 /*
   6  * ========================================================================
   7  * Copyright 2006 University of Washington
   8  *
   9  * Licensed under the Apache License, Version 2.0 (the "License");
  10  * you may not use this file except in compliance with the License.
  11  * You may obtain a copy of the License at
  12  *
  13  *     http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * ========================================================================
  16  */
  17
  18 #include "../pith/headers.h"
  19 #include "../pith/adjtime.h"
  20
  21
  22 /*
  23  * MSC ver 7.0 and less times are since 1900, everybody else's time so far
  24  * is since 1970. sheesh.
  25  */
  26 #if     defined(DOS) && (_MSC_VER == 700)
  27 #define EPOCH_ADJ       ((time_t)((time_t)(70*365 + 18) * (time_t)86400))
  28 #endif
  29
  30 /*
  31  * Adjust the mtime to return time since Unix epoch.  DOS is off by 70 years.
  32  */
  33 time_t
  34 get_adj_time(void)
  35 {
  36     time_t tt;
  37
  38     tt = time((time_t *)0);
  39
  40 #ifdef EPOCH_ADJ
  41     tt -= EPOCH_ADJ;
  42 #endif
  43
  44     return(tt);
  45 }
  46
  47
  48 time_t
  49 get_adj_name_file_mtime(char *name)
  50 {
  51     time_t mtime;
  52
  53     mtime = name_file_mtime(name);
  54
  55 #ifdef EPOCH_ADJ
  56     if(mtime != (time_t)(-1))
  57       mtime -= EPOCH_ADJ;
  58 #endif
  59
  60     return(mtime);
  61 }