106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
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// Copyright 2014 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fxcrt/cfx_datetime.h"
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#include "build/build_config.h"
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#include "core/fxcrt/fx_extension.h"
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#include "core/fxcrt/fx_system.h"
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#include "third_party/base/check.h"
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#include "third_party/base/span.h"
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namespace {
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constexpr uint8_t kDaysPerMonth[12] = {31, 28, 31, 30, 31, 30,
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31, 31, 30, 31, 30, 31};
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constexpr uint8_t kDaysPerLeapMonth[12] = {31, 29, 31, 30, 31, 30,
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31, 31, 30, 31, 30, 31};
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constexpr int32_t kDaysBeforeMonth[12] = {0, 31, 59, 90, 120, 151,
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181, 212, 243, 273, 304, 334};
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constexpr int32_t kDaysBeforeLeapMonth[12] = {0, 31, 60, 91, 121, 152,
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182, 213, 244, 274, 305, 335};
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constexpr int32_t kDaysPerYear = 365;
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constexpr int32_t kDaysPerLeapYear = 366;
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int32_t DaysBeforeMonthInYear(int32_t iYear, uint8_t iMonth) {
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DCHECK(iYear != 0);
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pdfium::span<const int32_t> p = FX_IsLeapYear(iYear)
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? pdfium::make_span(kDaysBeforeLeapMonth)
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: pdfium::make_span(kDaysBeforeMonth);
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// Note: iMonth is one-based.
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return p[iMonth - 1];
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}
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int32_t DaysInYear(int32_t iYear) {
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DCHECK(iYear != 0);
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return FX_IsLeapYear(iYear) ? kDaysPerLeapYear : kDaysPerYear;
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}
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int64_t DateToDays(int32_t iYear,
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uint8_t iMonth,
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uint8_t iDay,
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bool bIncludeThisDay) {
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DCHECK(iYear != 0);
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DCHECK(iMonth >= 1);
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DCHECK(iMonth <= 12);
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DCHECK(iDay >= 1);
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DCHECK(iDay <= FX_DaysInMonth(iYear, iMonth));
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int64_t iDays = DaysBeforeMonthInYear(iYear, iMonth);
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iDays += iDay;
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if (!bIncludeThisDay)
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iDays--;
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if (iYear > 0) {
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iYear--;
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} else {
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iDays -= DaysInYear(iYear);
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iYear++;
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}
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return iDays + static_cast<int64_t>(iYear) * 365 + iYear / 4 - iYear / 100 +
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iYear / 400;
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}
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} // namespace
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uint8_t FX_DaysInMonth(int32_t iYear, uint8_t iMonth) {
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DCHECK(iYear != 0);
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pdfium::span<const uint8_t> p = FX_IsLeapYear(iYear)
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? pdfium::make_span(kDaysPerLeapMonth)
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: pdfium::make_span(kDaysPerMonth);
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// Note: iMonth is one-based.
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return p[iMonth - 1];
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}
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bool FX_IsLeapYear(int32_t iYear) {
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DCHECK(iYear != 0);
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return ((iYear % 4) == 0 && (iYear % 100) != 0) || (iYear % 400) == 0;
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}
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// static
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CFX_DateTime CFX_DateTime::Now() {
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time_t t = FXSYS_time(nullptr);
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struct tm* pTime = FXSYS_localtime(&t);
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return CFX_DateTime(
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pTime->tm_year + 1900, static_cast<uint8_t>(pTime->tm_mon + 1),
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static_cast<uint8_t>(pTime->tm_mday),
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static_cast<uint8_t>(pTime->tm_hour), static_cast<uint8_t>(pTime->tm_min),
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static_cast<uint8_t>(pTime->tm_sec), 0);
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}
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int32_t CFX_DateTime::GetDayOfWeek() const {
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int32_t v = static_cast<int32_t>(DateToDays(year_, month_, day_, true) % 7);
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if (v < 0)
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v += 7;
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return v;
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}
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bool CFX_DateTime::operator==(const CFX_DateTime& other) const {
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return year_ == other.year_ && month_ == other.month_ && day_ == other.day_ &&
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hour_ == other.hour_ && minute_ == other.minute_ &&
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second_ == other.second_ && millisecond_ == other.millisecond_;
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}
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