usr.sbin/i4b/isdnd/holiday.c

   1 /*
   2  * Copyright (c) 2000, 2001 Hellmuth Michaelis. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  *
  25  *---------------------------------------------------------------------------
  26  *
  27  *      isdnd - holiday file handling
  28  *      =============================
  29  *
  30  * $FreeBSD: src/usr.sbin/i4b/isdnd/holiday.c,v 1.3.2.1 2001/08/01 17:45:03 obrien Exp $
  31  * $DragonFly: src/usr.sbin/i4b/isdnd/holiday.c,v 1.2 2003/06/17 04:29:54 dillon Exp $
  32  *
  33  *      last edit-date: [Wed May  2 09:42:56 2001]
  34  *
  35  *      Format:
  36  *
  37  *      day.month.year  optional comment (different day every year)     or
  38  *      day.month       optional comment (same day every year)
  39  *
  40  *      i.e.:
  41  *
  42  *      23.4.2000       Ostersonntag
  43  *      3.10            Tag der deutschen Einheit
  44  *
  45  *----------------------------------------------------------------------------*/
  46
  47 #include "isdnd.h"
  48
  49 struct holiday {
  50         int     day;
  51         int     month;
  52         int     year;
  53         struct holiday *next;
  54 };
  55
  56 static struct holiday *firsth = NULL;
  57
  58 #define MAXBUFSZ        256
  59
  60 static void free_holiday(struct holiday *ptr);
  61
  62 /*---------------------------------------------------------------------------*
  63  *      read in and init holidayes
  64  *---------------------------------------------------------------------------*/
  65 void
  66 init_holidays(char *filename)
  67 {
  68         FILE *fp;
  69         unsigned char buffer[MAXBUFSZ + 1];
  70         struct holiday *newh = NULL;
  71         struct holiday *lasth = NULL;
  72         int ret;
  73         int day, month, year;
  74
  75         firsth = NULL;
  76
  77         if((fp = fopen(filename, "r")) == NULL)
  78         {
  79                 DBGL(DL_VALID, (log(LL_DBG, "init_holiday: error opening holidayfile %s: %s!", filename, strerror(errno))));
  80                 return;
  81         }
  82
  83         while((fgets(buffer, MAXBUFSZ, fp)) != NULL)
  84         {
  85                 if(buffer[0] == '#'  || buffer[0] == ' ' ||
  86                    buffer[0] == '\t' || buffer[0] == '\n')
  87                 {
  88                         continue;
  89                 }
  90
  91                 ret = sscanf(buffer, "%d.%d.%d", &day, &month, &year);
  92
  93                 if(ret != 3)
  94                 {
  95                         ret = sscanf(buffer, "%d.%d", &day, &month);
  96                         if(ret != 2)
  97                         {
  98                                 log(LL_ERR, "init_holiday: parse error for string [%s]!", buffer);
  99                                 exit(1);
 100                         }
 101                         year = 0;
 102                 }
 103
 104                 if((newh = (struct holiday *) malloc(sizeof(struct holiday))) == NULL)
 105                 {
 106                         log(LL_ERR, "init_holiday: malloc failed for struct holiday!\n");
 107                         exit(1);
 108                 }
 109
 110                 if(year)
 111                 {
 112                         DBGL(DL_VALID, (log(LL_DBG, "init_holidays: add %d.%d.%d", day, month, year)));
 113                 }
 114                 else
 115                 {
 116                         DBGL(DL_VALID, (log(LL_DBG, "init_holidays: add %d.%d", day, month)));
 117                 }
 118
 119                 newh->day = day;
 120                 newh->month = month;
 121                 newh->year = year;
 122                 newh->next = NULL;
 123
 124                 if(firsth == NULL)
 125                 {
 126                         firsth = newh;
 127                 }
 128                 else
 129                 {
 130                         lasth->next = newh;
 131                 }
 132                 lasth = newh;
 133         }
 134         fclose(fp);
 135 }
 136
 137 /*---------------------------------------------------------------------------*
 138  *      free all holidays
 139  *---------------------------------------------------------------------------*/
 140 void
 141 free_holidays(void)
 142 {
 143         free_holiday(firsth);
 144 }
 145
 146 /*---------------------------------------------------------------------------*
 147  *      free holidayes
 148  *---------------------------------------------------------------------------*/
 149 static void
 150 free_holiday(struct holiday *ptr)
 151 {
 152
 153         if(ptr == NULL)
 154                 return;
 155
 156         if(ptr->next != NULL)
 157                 free_holiday(ptr->next);
 158
 159         free(ptr);
 160 }
 161
 162 /*---------------------------------------------------------------------------*
 163  *      check if date/month/year is a holiday
 164  *---------------------------------------------------------------------------*/
 165 int
 166 isholiday(int d, int m, int y)
 167 {
 168         struct holiday *ch = NULL;
 169
 170         if(firsth == NULL)
 171                 return(0);
 172
 173         ch = firsth;
 174
 175         for(;;)
 176         {
 177                 if(ch->day == d && ch->month == m)
 178                 {
 179                         if(ch->year == 0)
 180                         {
 181                                 DBGL(DL_VALID, (log(LL_DBG, "isholiday: %d.%d is a holiday!", d, m)));
 182                                 return(1);
 183                         }
 184                         else if(ch->year == y)
 185                         {
 186                                 DBGL(DL_VALID, (log(LL_DBG, "isholiday: %d.%d.%d is a holiday!", d, m, y)));
 187                                 return(1);
 188                         }
 189                 }
 190
 191                 if(ch->next == NULL)
 192                         break;
 193
 194                 ch = ch->next;
 195         }
 196         return(0);
 197 }
 198
 199 /* EOF */