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