mirror of
https://github.com/cesanta/mongoose.git
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Sergey Lyubka
4650e491df
CL: Apache license to common/ PUBLISHED_FROM=901e9e4b12a31289b3515d1f86dd56a7f0f35c5e
96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
/*
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* Copyright (c) 2014-2018 Cesanta Software Limited
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* All rights reserved
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*
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* Licensed under the Apache License, Version 2.0 (the ""License"");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an ""AS IS"" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "common/cs_time.h"
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#ifndef _WIN32
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#include <stddef.h>
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/*
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* There is no sys/time.h on ARMCC.
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*/
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#if !(defined(__ARMCC_VERSION) || defined(__ICCARM__)) && \
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!defined(__TI_COMPILER_VERSION__) && \
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(!defined(CS_PLATFORM) || CS_PLATFORM != CS_P_NXP_LPC)
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#include <sys/time.h>
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#endif
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#else
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#include <windows.h>
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#endif
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double cs_time(void) WEAK;
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double cs_time(void) {
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double now;
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#ifndef _WIN32
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struct timeval tv;
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if (gettimeofday(&tv, NULL /* tz */) != 0) return 0;
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now = (double) tv.tv_sec + (((double) tv.tv_usec) / 1000000.0);
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#else
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SYSTEMTIME sysnow;
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FILETIME ftime;
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GetLocalTime(&sysnow);
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SystemTimeToFileTime(&sysnow, &ftime);
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/*
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* 1. VC 6.0 doesn't support conversion uint64 -> double, so, using int64
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* This should not cause a problems in this (21th) century
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* 2. Windows FILETIME is a number of 100-nanosecond intervals since January
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* 1, 1601 while time_t is a number of _seconds_ since January 1, 1970 UTC,
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* thus, we need to convert to seconds and adjust amount (subtract 11644473600
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* seconds)
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*/
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now = (double) (((int64_t) ftime.dwLowDateTime +
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((int64_t) ftime.dwHighDateTime << 32)) /
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10000000.0) -
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11644473600;
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#endif /* _WIN32 */
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return now;
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}
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double cs_timegm(const struct tm *tm) {
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/* Month-to-day offset for non-leap-years. */
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static const int month_day[12] = {0, 31, 59, 90, 120, 151,
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181, 212, 243, 273, 304, 334};
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/* Most of the calculation is easy; leap years are the main difficulty. */
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int month = tm->tm_mon % 12;
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int year = tm->tm_year + tm->tm_mon / 12;
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int year_for_leap;
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int64_t rt;
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if (month < 0) { /* Negative values % 12 are still negative. */
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month += 12;
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--year;
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}
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/* This is the number of Februaries since 1900. */
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year_for_leap = (month > 1) ? year + 1 : year;
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rt =
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tm->tm_sec /* Seconds */
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+
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60 *
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(tm->tm_min /* Minute = 60 seconds */
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+
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60 * (tm->tm_hour /* Hour = 60 minutes */
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+
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24 * (month_day[month] + tm->tm_mday - 1 /* Day = 24 hours */
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+ 365 * (year - 70) /* Year = 365 days */
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+ (year_for_leap - 69) / 4 /* Every 4 years is leap... */
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- (year_for_leap - 1) / 100 /* Except centuries... */
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+ (year_for_leap + 299) / 400))); /* Except 400s. */
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return rt < 0 ? -1 : (double) rt;
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}
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