59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
static struct zonetable {
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int offset;
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char *stdzone;
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char *dstzone;
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} zonetable[] = {
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-3*60-30, "NST", 0, /* new foundland ??? */
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-4*60, "AST", "ADT", /* atlanic */
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-5*60, "EST", "EDT", /* eastern */
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-6*60, "CST", "CDT", /* central */
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-7*60, "MST", "MDT", /* mountain */
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-8*60, "PST", "PDT", /* pacific */
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-9*60, "YST", "YDT", /* yukon */
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-10*60, "AST", "ADT", /* aleutian */
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-10*60, "HST", "HDT", /* hawai, never found */
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0, "GMT", 0, /* Greenwich */
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0, "WET", "WDT", /* west european, never found */
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1*60,"MET", "MDT", /* middle european */
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2*60, "EET", "EDT", /* east european */
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8*60, "WST", 0, /* west australia */
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9*60, "JST", 0, /* japan */
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9*60+30, "CST", 0, /* also australia ??? */
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10*60, "EST", 0, /* also australia ??? */
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-1
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};
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char *
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timezone(zone, dst)
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{
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register struct zonetable *p = zonetable;
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static char buf[16];
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register char *c;
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int i;
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while (p->offset != -1) {
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if (zone == -p->offset) {
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if (dst && p->dstzone) return p->dstzone;
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if (!dst && p->stdzone) return p->stdzone;
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}
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p++;
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}
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*c++ = 'G';
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*c++ = 'M';
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*c++ = 'T';
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if (zone < 0) {
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zone = - zone;
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*c++ = '+';
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}
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else *c++ = '-';
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i = (zone / 60) % 24;
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if (i >= 10) {
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*c++ = i / 10 + '0';
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}
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*c++ = i % 10 + '0';
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i = zone % 60;
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*c++ = i / 10 + '0';
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*c++ = i % 10 + '0';
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*c = '\0';
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return buf;
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}
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