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// Copyright 2016 PDFium Authors. All rights reserved.
// 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 "fpdfsdk/cpdfsdk_datetime.h"
#include "core/fxcrt/fx_extension.h"
namespace {
int GetTimeZoneInSeconds(int8_t tzhour, uint8_t tzminute) {
return (int)tzhour * 3600 + (int)tzminute * (tzhour >= 0 ? 60 : -60);
}
bool IsLeapYear(int16_t year) {
return ((year % 400 == 0) || ((year % 4 == 0) && (year % 100 != 0)));
}
uint16_t GetYearDays(int16_t year) {
return (IsLeapYear(year) ? 366 : 365);
}
uint8_t GetMonthDays(int16_t year, uint8_t month) {
uint8_t mDays;
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
mDays = 31;
break;
case 4:
case 6:
case 9:
case 11:
mDays = 30;
break;
case 2:
if (IsLeapYear(year))
mDays = 29;
else
mDays = 28;
break;
default:
mDays = 0;
break;
}
return mDays;
}
} // namespace
CPDFSDK_DateTime::CPDFSDK_DateTime() {
ResetDateTime();
}
CPDFSDK_DateTime::CPDFSDK_DateTime(const ByteString& dtStr) {
ResetDateTime();
FromPDFDateTimeString(dtStr);
}
CPDFSDK_DateTime::CPDFSDK_DateTime(const CPDFSDK_DateTime& that)
: m_year(that.m_year),
m_month(that.m_month),
m_day(that.m_day),
m_hour(that.m_hour),
m_minute(that.m_minute),
m_second(that.m_second),
m_tzHour(that.m_tzHour),
m_tzMinute(that.m_tzMinute) {}
CPDFSDK_DateTime::CPDFSDK_DateTime(const FX_SYSTEMTIME& st) {
tzset();
m_year = static_cast<int16_t>(st.wYear);
m_month = static_cast<uint8_t>(st.wMonth);
m_day = static_cast<uint8_t>(st.wDay);
m_hour = static_cast<uint8_t>(st.wHour);
m_minute = static_cast<uint8_t>(st.wMinute);
m_second = static_cast<uint8_t>(st.wSecond);
}
void CPDFSDK_DateTime::ResetDateTime() {
tzset();
time_t curTime;
time(&curTime);
struct tm* newtime = localtime(&curTime);
m_year = newtime->tm_year + 1900;
m_month = newtime->tm_mon + 1;
m_day = newtime->tm_mday;
m_hour = newtime->tm_hour;
m_minute = newtime->tm_min;
m_second = newtime->tm_sec;
}
bool CPDFSDK_DateTime::operator==(const CPDFSDK_DateTime& that) const {
return m_year == that.m_year && m_month == that.m_month &&
m_day == that.m_day && m_hour == that.m_hour &&
m_minute == that.m_minute && m_second == that.m_second &&
m_tzHour == that.m_tzHour && m_tzMinute == that.m_tzMinute;
}
bool CPDFSDK_DateTime::operator!=(const CPDFSDK_DateTime& datetime) const {
return !(*this == datetime);
}
time_t CPDFSDK_DateTime::ToTime_t() const {
struct tm newtime;
newtime.tm_year = m_year - 1900;
newtime.tm_mon = m_month - 1;
newtime.tm_mday = m_day;
newtime.tm_hour = m_hour;
newtime.tm_min = m_minute;
newtime.tm_sec = m_second;
return mktime(&newtime);
}
CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
const ByteString& dtStr) {
int strLength = dtStr.GetLength();
if (strLength <= 0)
return *this;
int i = 0;
while (i < strLength && !std::isdigit(dtStr[i]))
++i;
if (i >= strLength)
return *this;
int j = 0;
int k = 0;
char ch;
while (i < strLength && j < 4) {
ch = dtStr[i];
k = k * 10 + FXSYS_DecimalCharToInt(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
m_year = static_cast<int16_t>(k);
if (i >= strLength || j < 4)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_DecimalCharToInt(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
m_month = static_cast<uint8_t>(k);
if (i >= strLength || j < 2)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_DecimalCharToInt(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
m_day = static_cast<uint8_t>(k);
if (i >= strLength || j < 2)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_DecimalCharToInt(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
m_hour = static_cast<uint8_t>(k);
if (i >= strLength || j < 2)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_DecimalCharToInt(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
m_minute = static_cast<uint8_t>(k);
if (i >= strLength || j < 2)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_DecimalCharToInt(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
m_second = static_cast<uint8_t>(k);
if (i >= strLength || j < 2)
return *this;
ch = dtStr[i++];
if (ch != '-' && ch != '+')
return *this;
if (ch == '-')
m_tzHour = -1;
else
m_tzHour = 1;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_DecimalCharToInt(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
m_tzHour *= static_cast<int8_t>(k);
if (i >= strLength || j < 2)
return *this;
if (dtStr[i++] != '\'')
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_DecimalCharToInt(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
m_tzMinute = static_cast<uint8_t>(k);
return *this;
}
ByteString CPDFSDK_DateTime::ToCommonDateTimeString() {
return ByteString::Format("%04d-%02u-%02u %02u:%02u:%02u ", m_year, m_month,
m_day, m_hour, m_minute, m_second) +
(m_tzHour < 0 ? "-" : "+") +
ByteString::Format("%02d:%02u", std::abs(static_cast<int>(m_tzHour)),
m_tzMinute);
}
ByteString CPDFSDK_DateTime::ToPDFDateTimeString() {
ByteString dtStr;
char tempStr[32];
memset(tempStr, 0, sizeof(tempStr));
FXSYS_snprintf(tempStr, sizeof(tempStr) - 1, "D:%04d%02u%02u%02u%02u%02u",
m_year, m_month, m_day, m_hour, m_minute, m_second);
dtStr = ByteString(tempStr);
if (m_tzHour < 0)
dtStr += ByteString("-");
else
dtStr += ByteString("+");
memset(tempStr, 0, sizeof(tempStr));
FXSYS_snprintf(tempStr, sizeof(tempStr) - 1, "%02d'%02u'",
std::abs(static_cast<int>(m_tzHour)), m_tzMinute);
dtStr += ByteString(tempStr);
return dtStr;
}
void CPDFSDK_DateTime::ToSystemTime(FX_SYSTEMTIME& st) {
time_t t = this->ToTime_t();
struct tm* pTime = localtime(&t);
if (!pTime)
return;
st.wYear = static_cast<uint16_t>(pTime->tm_year) + 1900;
st.wMonth = static_cast<uint16_t>(pTime->tm_mon) + 1;
st.wDay = static_cast<uint16_t>(pTime->tm_mday);
st.wDayOfWeek = static_cast<uint16_t>(pTime->tm_wday);
st.wHour = static_cast<uint16_t>(pTime->tm_hour);
st.wMinute = static_cast<uint16_t>(pTime->tm_min);
st.wSecond = static_cast<uint16_t>(pTime->tm_sec);
st.wMilliseconds = 0;
}
CPDFSDK_DateTime CPDFSDK_DateTime::ToGMT() const {
CPDFSDK_DateTime new_dt = *this;
new_dt.AddSeconds(-GetTimeZoneInSeconds(new_dt.m_tzHour, new_dt.m_tzMinute));
new_dt.m_tzHour = 0;
new_dt.m_tzMinute = 0;
return new_dt;
}
CPDFSDK_DateTime& CPDFSDK_DateTime::AddDays(short days) {
if (days == 0)
return *this;
int16_t y = m_year;
uint8_t m = m_month;
uint8_t d = m_day;
int ldays = days;
if (ldays > 0) {
int16_t yy = y;
if ((static_cast<uint16_t>(m) * 100 + d) > 300)
yy++;
int ydays = GetYearDays(yy);
int mdays;
while (ldays >= ydays) {
y++;
ldays -= ydays;
yy++;
mdays = GetMonthDays(y, m);
if (d > mdays) {
m++;
d -= mdays;
}
ydays = GetYearDays(yy);
}
mdays = GetMonthDays(y, m) - d + 1;
while (ldays >= mdays) {
ldays -= mdays;
m++;
d = 1;
mdays = GetMonthDays(y, m);
}
d += ldays;
} else {
ldays *= -1;
int16_t yy = y;
if ((static_cast<uint16_t>(m) * 100 + d) < 300)
yy--;
int ydays = GetYearDays(yy);
while (ldays >= ydays) {
y--;
ldays -= ydays;
yy--;
int mdays = GetMonthDays(y, m);
if (d > mdays) {
m++;
d -= mdays;
}
ydays = GetYearDays(yy);
}
while (ldays >= d) {
ldays -= d;
m--;
d = GetMonthDays(y, m);
}
d -= ldays;
}
m_year = y;
m_month = m;
m_day = d;
return *this;
}
CPDFSDK_DateTime& CPDFSDK_DateTime::AddSeconds(int seconds) {
if (seconds == 0)
return *this;
int n;
int days;
n = m_hour * 3600 + m_minute * 60 + m_second + seconds;
if (n < 0) {
days = (n - 86399) / 86400;
n -= days * 86400;
} else {
days = n / 86400;
n %= 86400;
}
m_hour = static_cast<uint8_t>(n / 3600);
m_hour %= 24;
n %= 3600;
m_minute = static_cast<uint8_t>(n / 60);
m_second = static_cast<uint8_t>(n % 60);
if (days != 0)
AddDays(days);
return *this;
}