UNIX 7th Ed. - /usr/src/libc/gen/timezone.c

   1: /*
   2:  * The arguments are the number of minutes of time
   3:  * you are westward from Greenwich and whether DST is in effect.
   4:  * It returns a string
   5:  * giving the name of the local timezone.
   6:  *
   7:  * Sorry, I don't know all the names.
   8:  */
   9: 
  10: static struct zone {
  11:     int offset;
  12:     char    *stdzone;
  13:     char    *dlzone;
  14: } zonetab[] = {
  15:     4*60, "AST", "ADT",     /* Atlantic */
  16:     5*60, "EST", "EDT",     /* Eastern */
  17:     6*60, "CST", "CDT",     /* Central */
  18:     7*60, "MST", "MDT",     /* Mountain */
  19:     8*60, "PST", "PDT",     /* Pacific */
  20:     0, "GMT", 0,            /* Greenwich */
  21:     -1
  22: };
  23: 
  24: char *timezone(zone, dst)
  25: {
  26:     register struct zone *zp;
  27:     static char czone[10];
  28:     char *sign;
  29: 
  30:     for (zp=zonetab; zp->offset!=-1; zp++)
  31:         if (zp->offset==zone) {
  32:             if (dst && zp->dlzone)
  33:                 return(zp->dlzone);
  34:             if (!dst && zp->stdzone)
  35:                 return(zp->stdzone);
  36:         }
  37:     if (zone<0) {
  38:         zone = -zone;
  39:         sign = "+";
  40:     } else
  41:         sign = "-";
  42:     sprintf(czone, "GMT%s%d:%02d", sign, zone/60, zone%60);
  43:     return(czone);
  44: }

Defined functions

Defined variables

Defined struct's