| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Author: jmarantz@google.com (Joshua Marantz) |
| |
| #include "pagespeed/kernel/base/time_util.h" |
| #include <ctime> |
| #include "prtime.h" // NOLINT |
| #include "pagespeed/kernel/base/basictypes.h" |
| #include "pagespeed/kernel/base/string.h" |
| #include "pagespeed/kernel/base/string_util.h" |
| #ifdef WIN32 |
| #include <time.h> |
| #endif // WIN32 |
| |
| namespace net_instaweb { |
| |
| namespace { |
| // Converts time (in ms or us) to a string. |
| // us is true if time is in microseconds; |
| // otherwise time is in milliseconds. |
| bool TimeToString(int64 time, GoogleString* time_string, |
| bool include_microseconds) { |
| time_t time_sec; |
| if (include_microseconds) { |
| time_sec = time / 1000000; |
| } else { |
| time_sec = time / 1000; |
| } |
| struct tm time_buf; |
| #ifdef WIN32 |
| struct tm* time_info = NULL; |
| if (gmtime_s(&time_buf, &time_sec) == 0) { |
| time_info = &time_buf; |
| } |
| #else |
| struct tm* time_info = gmtime_r(&time_sec, &time_buf); |
| #endif // WIN32 |
| if ((time_info == NULL) || |
| (time_buf.tm_wday < 0) || |
| (time_buf.tm_wday > 6) || |
| (time_buf.tm_mon < 0) || |
| (time_buf.tm_mon > 11)) { |
| return false; |
| } |
| |
| static const char* kWeekDay[] = { |
| "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}; |
| static const char* kMonth[] = { |
| "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", |
| "Dec"}; |
| |
| // RFC 822 says to format like this: |
| // Thu Nov 18 02:15:22 2010 GMT |
| // See http://www.faqs.org/rfcs/rfc822.html |
| // |
| // But redbot.org likes this: |
| // Wed, 24 Nov 2010 21:14:12 GMT |
| |
| // If us is true, time is down to microseconds, the format is like this: |
| // Wed, 24 Nov 2010 21:14:12.12345 GMT |
| *time_string = StringPrintf("%s, %02d %s %4d %02d:%02d:%02d", |
| kWeekDay[time_buf.tm_wday], |
| time_buf.tm_mday, |
| kMonth[time_buf.tm_mon], |
| 1900 + time_buf.tm_year, |
| time_buf.tm_hour, |
| time_buf.tm_min, |
| time_buf.tm_sec); |
| if (include_microseconds) { |
| // Append microseconds. |
| int remainder = time % 1000000; |
| StrAppend(time_string, ".", IntegerToString(remainder), " GMT"); |
| } else { |
| // Note if we do StrAppend(time_string, " GMT") results in error "too few |
| // arguments to function StrAppend". |
| StrAppend(time_string, " ", "GMT"); |
| } |
| |
| return true; |
| } |
| |
| } // namespace. |
| |
| bool ConvertTimeToString(int64 time_ms, GoogleString* time_string) { |
| return (TimeToString(time_ms, time_string, false)); |
| } |
| |
| // This function is similar to ConvertTimeToString, except it takes time_us |
| // and returns a string with microsecond accuracy. |
| bool ConvertTimeToStringWithUs(int64 time_us, GoogleString* time_string) { |
| return(TimeToString(time_us, time_string, true)); |
| } |
| |
| bool ConvertStringToTime(const StringPiece& time_string, int64 *time_ms) { |
| if (time_string.empty()) { |
| *time_ms = 0; |
| return false; |
| } |
| PRTime result_time_us = 0; |
| PRStatus result = PR_ParseTimeString(time_string.as_string().c_str(), |
| PR_FALSE, &result_time_us); |
| if (PR_SUCCESS != result) { |
| return false; |
| } |
| |
| *time_ms = result_time_us / 1000; |
| return true; |
| } |
| |
| } // namespace net_instaweb |