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/*
* Copyright (c) 2015 DeNA Co., Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include "h2o/time_.h"
static char *emit_wday(char *dst, int wday)
{
memcpy(dst, ("SunMonTueWedThuFriSat") + wday * 3, 3);
return dst + 3;
}
static char *emit_mon(char *dst, int mon)
{
memcpy(dst, ("JanFebMarAprMayJunJulAugSepOctNovDec") + mon * 3, 3);
return dst + 3;
}
static char *emit_digits(char *dst, int n, size_t cnt)
{
char *p = dst + cnt;
/* emit digits from back */
do {
*--p = '0' + n % 10;
n /= 10;
} while (p != dst);
return dst + cnt;
}
void h2o_time2str_rfc1123(char *buf, struct tm *gmt)
{
char *p = buf;
/* format: Fri, 19 Sep 2014 05:24:04 GMT */
p = emit_wday(p, gmt->tm_wday);
*p++ = ',';
*p++ = ' ';
p = emit_digits(p, gmt->tm_mday, 2);
*p++ = ' ';
p = emit_mon(p, gmt->tm_mon);
*p++ = ' ';
p = emit_digits(p, gmt->tm_year + 1900, 4);
*p++ = ' ';
p = emit_digits(p, gmt->tm_hour, 2);
*p++ = ':';
p = emit_digits(p, gmt->tm_min, 2);
*p++ = ':';
p = emit_digits(p, gmt->tm_sec, 2);
memcpy(p, " GMT", 4);
p += 4;
*p = '\0';
assert(p - buf == H2O_TIMESTR_RFC1123_LEN);
}
static int fetch_digits(const char *s, size_t n)
{
int value = 0;
for (; n != 0; ++s, --n) {
if (!('0' <= *s && *s <= '9'))
return -1;
value = value * 10 + *s - '0';
}
return value;
}
int h2o_time_parse_rfc1123(const char *s, size_t len, struct tm *tm)
{
if (len != H2O_TIMESTR_RFC1123_LEN)
return -1;
/* 1 2
* 01234567890123456789012345678
* Fri, 19 Sep 2014 05:24:04 GMT
*/
#define FETCH(dst, pos, n) \
if ((dst = fetch_digits(s + pos, n)) == -1) \
return -1;
FETCH(tm->tm_year, 12, 4);
tm->tm_year -= 1900;
/* month is parsed afterwards */
FETCH(tm->tm_mday, 5, 2);
FETCH(tm->tm_hour, 17, 2);
FETCH(tm->tm_min, 20, 2);
FETCH(tm->tm_sec, 23, 2);
#undef FETCH
#define PACK3(a, b, c) (((a)&0xff) << 16 | ((b)&0xff) << 8 | ((c)&0xff))
#define MAP(c1, c2, c3, value) \
case PACK3(c1, c2, c3): \
tm->tm_mon = value; \
break
switch (PACK3(s[8], s[9], s[10])) {
MAP('J', 'a', 'n', 0);
MAP('F', 'e', 'b', 1);
MAP('M', 'a', 'r', 2);
MAP('A', 'p', 'r', 3);
MAP('M', 'a', 'y', 4);
MAP('J', 'u', 'n', 5);
MAP('J', 'u', 'l', 6);
MAP('A', 'u', 'g', 7);
MAP('S', 'e', 'p', 8);
MAP('O', 'c', 't', 9);
MAP('N', 'o', 'v', 10);
MAP('D', 'e', 'c', 11);
default:
return -1;
}
#undef MAP
#undef PACK3
return 0;
}
static int calc_gmt_offset(time_t t, struct tm *local)
{
struct tm gmt;
int delta;
gmtime_r(&t, &gmt);
delta = (local->tm_hour - gmt.tm_hour) * 60 + (local->tm_min - gmt.tm_min);
if (local->tm_yday != gmt.tm_yday) {
int day_offset;
if (local->tm_year == gmt.tm_year)
day_offset = local->tm_yday - gmt.tm_yday;
else
day_offset = local->tm_year - gmt.tm_year;
delta += day_offset * 24 * 60;
}
return delta;
}
void h2o_time2str_log(char *buf, time_t time)
{
struct tm localt;
localtime_r(&time, &localt);
int gmt_off = calc_gmt_offset(time, &localt);
int gmt_sign;
if (gmt_off >= 0) {
gmt_sign = '+';
} else {
gmt_off = -gmt_off;
gmt_sign = '-';
}
int len = sprintf(buf, "%02d/%s/%d:%02d:%02d:%02d %c%02d%02d", localt.tm_mday,
("Jan\0Feb\0Mar\0Apr\0May\0Jun\0Jul\0Aug\0Sep\0Oct\0Nov\0Dec\0") + localt.tm_mon * 4, localt.tm_year + 1900,
localt.tm_hour, localt.tm_min, localt.tm_sec, gmt_sign, gmt_off / 60, gmt_off % 60);
assert(len == H2O_TIMESTR_LOG_LEN);
}
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