libchill/abstime.c

   1 /* Implement timing-related runtime actions for CHILL.
   2    Copyright (C) 1992,1993 Free Software Foundation, Inc.
   3    Author: Wilfried Moser
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC 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 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* As a special exception, if you link this library with other files,
  23    some of which are compiled with GCC, to produce an executable,
  24    this library does not by itself cause the resulting executable
  25    to be covered by the GNU General Public License.
  26    This exception does not however invalidate any other reasons why
  27    the executable file might be covered by the GNU General Public License.  */
  28
  29 #include <time.h>
  30 #include "rtltypes.h"
  31
  32 EXCEPTION (rangefail);
  33
  34 #define SECOND_VALID         1
  35 #define MINUTE_VALID         2
  36 #define HOUR_VALID           4
  37 #define DAY_VALID            8
  38 #define MONTH_VALID         16
  39 #define YEAR_VALID          32
  40
  41 extern void __cause_ex1 (char *ex, char *file, int lineno);
  42
  43 #define CAUSE_RANGEFAIL     __cause_ex1 ("rangefail", filename, lineno)
  44
  45 /*
  46  * function _abstime
  47  *
  48  * parameters:
  49  *     mask - mask of valid values
  50  *     year
  51  *     month
  52  *     day
  53  *     hour
  54  *     minute
  55  *     second
  56  *
  57  * returns:
  58  *     unsigned long
  59  *
  60  * exceptions:
  61  *     rangefail
  62  *
  63  * abstract:
  64  *     perform the ABSTIME builtin call
  65  *
  66  */
  67
  68 unsigned long
  69 _abstime (mask, year, month, day, hour, minute, second,
  70           filename, lineno)
  71      int  mask, year, month, day, hour, minute, second;
  72      char *filename;
  73      int  lineno;
  74 {
  75   struct tm   *time_str;
  76   time_t      result, current_time;
  77
  78   /* first of all get current time */
  79   if ((current_time = time (0)) == (time_t)-1)
  80     /* FIXME: what excpetion ?? */
  81     CAUSE_RANGEFAIL;
  82
  83   /* if we just have to determine the current time, we are ready.
  84      This is shown by mask == 0. */
  85   if (mask == 0)
  86     return (unsigned long)current_time;
  87
  88   /* convert current time to struct tm */
  89   time_str = localtime (&current_time);
  90
  91   if (mask & YEAR_VALID)
  92     {
  93       if (year < 1900)
  94         CAUSE_RANGEFAIL;
  95       time_str->tm_year = year - 1900;
  96     }
  97
  98   if (mask & MONTH_VALID)
  99     {
 100       if (month < 1 || month > 12)
 101         CAUSE_RANGEFAIL;
 102       time_str->tm_mon = month - 1;
 103     }
 104
 105   if (mask & DAY_VALID)
 106     {
 107       if (day < 1 || day > 31)
 108         CAUSE_RANGEFAIL;
 109       time_str->tm_mday = day;
 110     }
 111
 112   if (mask & HOUR_VALID)
 113     {
 114       if (hour < 0 || hour > 23)
 115         CAUSE_RANGEFAIL;
 116       time_str->tm_hour = hour;
 117     }
 118
 119   if (mask & MINUTE_VALID)
 120     {
 121       if (minute < 0 || minute > 59)
 122         CAUSE_RANGEFAIL;
 123       time_str->tm_min = minute;
 124     }
 125
 126   if (mask & SECOND_VALID)
 127     {
 128       if (second < 0 || second > 59)
 129         CAUSE_RANGEFAIL;
 130       time_str->tm_sec = second;
 131     }
 132
 133   /* do it */
 134   time_str->tm_isdst = -1;
 135   if ((result = mktime (time_str)) == (time_t)-1)
 136     CAUSE_RANGEFAIL;
 137
 138   return (unsigned long)result;
 139 }