mdw@git.distorted.org.uk Git - ezmlm/blob - date2yyyymm.c

   1
   2 /*$Id: date2yyyymm.c,v 1.1 1999/10/09 16:45:43 lindberg Exp $*/
   3 /*$Name: ezmlm-idx-040 $*/
   4 #include "yyyymm.h"
   5
   6 unsigned int date2yyyymm(s)
   7 char *s;
   8 /* expects a qmail date string s and returns yyyymm */
   9 /* if there are problems, it returns 0. If there is no terminating char */
  10 /* we may segfault if the syntax is bad. Assure that the ';' is there   */
  11 /* or add '\0' */
  12 {
  13   unsigned int mo;
  14   unsigned int year;    /* must hold yyyymm - ok to year 65K */
  15   char ch,ch1,ch2;
  16
  17 /* jan feb mar apr may jun jul aug sep oct nov dec */
  18 /* - strictly qmail datefmt dependent*/
  19   for (;;s++) {
  20     ch = *s;
  21     if (ch != ' ' && (ch < '0' || ch > '9')) break;
  22   }
  23   mo = 0;
  24   if (!(ch = *(s++))) return 0;
  25   if (ch >= 'a')  ch -= ('a' - 'A');    /* toupper */
  26   if (!(ch1 = *(s++))) return 0;        /* rfc822 hrds are case-insens */
  27   if (ch1 >= 'a')  ch1 -= ('a' - 'A');
  28   if (!(ch2 = *(s++))) return 0;
  29   if (ch2 >= 'a')  ch2 -= ('a' - 'A');
  30
  31   switch (ch) {
  32     case 'J':
  33         if (ch1 == 'A' && ch2 == 'N') { mo = 1; break; }
  34         if (ch1 == 'U') {
  35           if (ch2 == 'N') mo = 6;
  36           else if (ch2 == 'L') mo = 7;
  37         }
  38         break;
  39     case 'F': if (ch1 == 'E' && ch2 == 'B') mo = 2; break;
  40     case 'A':
  41         if (ch1 == 'P' && ch2 == 'R') mo = 4;
  42         else if (ch1 == 'U' && ch2 == 'G') mo = 8;
  43         break;
  44     case 'M':
  45         if (ch1 != 'A') break;
  46         if (ch2 == 'R') mo = 3;
  47         else if (ch2 == 'Y') mo = 5;
  48         break;
  49     case 'S': if (ch1 == 'E' && ch2 == 'P') mo = 9; break;
  50     case 'O': if (ch1 == 'C' && ch2 == 'T') mo = 10; break;
  51     case 'N': if (ch1 == 'O' && ch2 == 'V') mo = 11; break;
  52     case 'D': if (ch1 == 'E' && ch2 == 'C') mo = 12; break;
  53     default:
  54         break;
  55   }
  56   if (!mo || *(s++) != ' ')
  57     return 0L;          /* mo true means s[0-2] valid */
  58   year = 0L;
  59   for (;;) {
  60     register unsigned char chy;
  61     chy = (unsigned char) *(s++);
  62     if (chy < '0' || chy > '9') {
  63       if (year) break;
  64       else return 0;
  65     }
  66     year = year * 10 + (chy - '0');
  67   }
  68   return year * 100 + mo;
  69 }
  70
  71