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Issue 9969098: Set the TZ env to get the UTC-ms since epoch. (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Address comment. Created 8 years, 7 months ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include "vm/os.h" 5 #include "vm/os.h"
6 6
7 #include <time.h> 7 #include <time.h>
8 8
9 #include "platform/assert.h" 9 #include "platform/assert.h"
10 10
11 namespace dart { 11 namespace dart {
12 12
13 bool OS::BreakDownSecondsSinceEpoch(time_t seconds_since_epoch, 13 bool OS::GmTime(int64_t seconds_since_epoch, tm* tm_result) {
14 bool in_utc, 14 time_t seconds = static_cast<time_t>(seconds_since_epoch);
15 BrokenDownDate* result) { 15 if (seconds != seconds_since_epoch) return false;
16 struct tm tm_result; 16 errno_t error_code = gmtime_s(tm_result, &seconds);
17 errno_t error_code;
18 if (in_utc) {
19 error_code = gmtime_s(&tm_result, &seconds_since_epoch);
20 } else {
21 // TODO(floitsch): we should be able to call tzset only once during
22 // initialization.
23 tzset(); // Make sure the libc knows about the local zone.
24 error_code = localtime_s(&tm_result, &seconds_since_epoch);
25 }
26 result->year = tm_result.tm_year;
27 result->month= tm_result.tm_mon;
28 result->day = tm_result.tm_mday;
29 result->hours = tm_result.tm_hour;
30 result->minutes = tm_result.tm_min;
31 result->seconds = tm_result.tm_sec;
32 return error_code == 0; 17 return error_code == 0;
33 } 18 }
34 19
35 20
36 bool OS::BrokenDownToSecondsSinceEpoch( 21 bool OS::LocalTime(int64_t seconds_since_epoch, tm* tm_result) {
37 const BrokenDownDate& broken_down, bool in_utc, time_t* result) { 22 time_t seconds = static_cast<time_t>(seconds_since_epoch);
38 struct tm tm_broken_down; 23 if (seconds != seconds_since_epoch) return false;
39 // mktime takes the years since 1900. 24 errno_t error_code = localtime_s(tm_result, &seconds);
40 tm_broken_down.tm_year = broken_down.year; 25 return error_code == 0;
41 tm_broken_down.tm_mon = broken_down.month; 26 }
42 tm_broken_down.tm_mday = broken_down.day; 27
43 tm_broken_down.tm_hour = broken_down.hours; 28
44 tm_broken_down.tm_min = broken_down.minutes; 29 bool OS::MkGmTime(tm* tm, int64_t* seconds_result) {
45 tm_broken_down.tm_sec = broken_down.seconds; 30 // Disable daylight saving.
31 tm->tm_isdst = 0;
46 // Set wday to an impossible day, so that we can catch bad input. 32 // Set wday to an impossible day, so that we can catch bad input.
47 tm_broken_down.tm_wday = -1; 33 tm->tm_wday = -1;
48 // Make sure the libc knows about the local zone. 34 time_t seconds = _mkgmtime(tm);
49 // In case of 'in_utc' this call is mainly for multi-threading issues. If 35 if ((seconds == -1) && (tm->tm_wday == -1)) {
50 // another thread uses a time-function it will set the timezone. The timezone
51 // adjustement below would then not work anymore.
52 // TODO(floitsch): we should be able to call tzset only once during
53 // initialization.
54 tzset();
55 if (in_utc) {
56 // Disable daylight saving in utc mode.
57 tm_broken_down.tm_isdst = 0;
58 // mktime assumes that the given date is local time zone.
59 *result = mktime(&tm_broken_down);
60 // Remove the timezone.
61 *result -= timezone;
62 } else {
63 // Let libc figure out if daylight saving is active.
64 tm_broken_down.tm_isdst = -1;
65 *result = mktime(&tm_broken_down);
66 }
67 if ((*result == -1) && (tm_broken_down.tm_wday == -1)) {
68 return false; 36 return false;
69 } 37 }
38 *seconds_result = seconds;
70 return true; 39 return true;
71 } 40 }
72 41
42
43 bool OS::MkTime(tm* tm, int64_t* seconds_result) {
44 // Let the libc figure out if daylight saving is active.
45 tm->tm_isdst = -1;
46 // Set wday to an impossible day, so that we can catch bad input.
47 tm->tm_wday = -1;
48 time_t seconds = mktime(tm);
49 if ((seconds == -1) && (tm->tm_wday == -1)) {
50 return false;
51 }
52 *seconds_result = seconds;
53 return true;
54 }
55
73 56
74 int64_t OS::GetCurrentTimeMillis() { 57 int64_t OS::GetCurrentTimeMillis() {
75 return GetCurrentTimeMicros() / 1000; 58 return GetCurrentTimeMicros() / 1000;
76 } 59 }
77 60
78 61
79 int64_t OS::GetCurrentTimeMicros() { 62 int64_t OS::GetCurrentTimeMicros() {
80 static const int64_t kTimeEpoc = 116444736000000000LL; 63 static const int64_t kTimeEpoc = 116444736000000000LL;
81 static const int64_t kTimeScaler = 10; // 100 ns to us. 64 static const int64_t kTimeScaler = 10; // 100 ns to us.
82 65
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219 void OS::Abort() { 202 void OS::Abort() {
220 abort(); 203 abort();
221 } 204 }
222 205
223 206
224 void OS::Exit(int code) { 207 void OS::Exit(int code) {
225 exit(code); 208 exit(code);
226 } 209 }
227 210
228 } // namespace dart 211 } // namespace dart
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