src/tatime.c

   1 /* tatime.c */
   2
   3 /*
   4  * Copyright (C) 2011-2012 by Werner Lemberg.
   5  *
   6  * This file is part of the ttfautohint library, and may only be used,
   7  * modified, and distributed under the terms given in `COPYING'.  By
   8  * continuing to use, modify, or distribute this file you indicate that you
   9  * have read `COPYING' and understand and accept it fully.
  10  *
  11  * The file `COPYING' mentioned in the previous paragraph is distributed
  12  * with the ttfautohint library.
  13  */
  14
  15
  16 #include <time.h>
  17
  18 #include "ta.h"
  19
  20 /* we need an unsigned 64bit data type */
  21
  22 /* make `stdint.h' define `uintXX_t' for C++ */
  23 #undef __STDC_LIMIT_MACROS
  24 #define __STDC_LIMIT_MACROS
  25
  26 #if HAVE_STDINT_H
  27 #  include <stdint.h>
  28 #endif
  29
  30 #if defined UINT64_MAX || defined uint64_t
  31 typedef uint64_t TA_ULongLong;
  32 #else
  33 #  error "No unsigned 64bit wide data type found."
  34 #endif
  35
  36
  37 void
  38 TA_get_current_time(FT_ULong *high,
  39                     FT_ULong *low)
  40 {
  41   /* there have been 24107 days between January 1st, 1904 (the epoch of */
  42   /* OpenType), and January 1st, 1970 (the epoch of the `time' function) */
  43   TA_ULongLong seconds_to_1970 = 24107 * 24 * 60 * 60;
  44   TA_ULongLong seconds_to_today = seconds_to_1970 + time(NULL);
  45
  46
  47   *high = (FT_ULong)(seconds_to_today >> 32);
  48   *low = (FT_ULong)seconds_to_today;
  49 }
  50
  51 /* end of tatime.c */