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Diffstat (limited to '')
| -rw-r--r-- | web/server/h2o/libh2o/lib/common/time.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/lib/common/time.c b/web/server/h2o/libh2o/lib/common/time.c new file mode 100644 index 00000000..368143e7 --- /dev/null +++ b/web/server/h2o/libh2o/lib/common/time.c @@ -0,0 +1,175 @@ +/* + * 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); +} |