68 lines
2.9 KiB
C
68 lines
2.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/str/str.h"
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#include "libc/time/struct/tm.h"
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#include "libc/time/time.h"
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#include "net/http/http.h"
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/**
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* Formats HTTP timestamp, e.g.
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*
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* Sun, 04 Oct 2020 19:50:10 GMT
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*
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* @param tm must be zulu see gmtime_r() and nowl()
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* @see ParseHttpDateTime()
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*/
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char *FormatHttpDateTime(char p[hasatleast 30], struct tm *tm) {
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unsigned i;
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p = mempcpy(p, kWeekdayNameShort[tm->tm_wday], 3);
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*p++ = ',';
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*p++ = ' ';
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i = tm->tm_mday;
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*p++ = '0' + i / 10;
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*p++ = '0' + i % 10;
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*p++ = ' ';
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p = mempcpy(p, kMonthNameShort[tm->tm_mon], 3);
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*p++ = ' ';
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i = tm->tm_year + 1900;
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*p++ = '0' + i / 1000;
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*p++ = '0' + i / 100 % 10;
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*p++ = '0' + i / 10 % 10;
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*p++ = '0' + i % 10;
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*p++ = ' ';
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i = tm->tm_hour;
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*p++ = '0' + i / 10;
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*p++ = '0' + i % 10;
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*p++ = ':';
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i = tm->tm_min;
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*p++ = '0' + i / 10;
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*p++ = '0' + i % 10;
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*p++ = ':';
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i = tm->tm_sec;
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*p++ = '0' + i / 10;
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*p++ = '0' + i % 10;
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*p++ = ' ';
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*p++ = 'G';
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*p++ = 'M';
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*p++ = 'T';
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*p = '\0';
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return p;
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}
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