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1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 
7 #include "core/fxcrt/cfx_datetime.h"
8 #include "core/fxcrt/fx_system.h"
9 
10 #if _FX_OS_ == _FX_OS_LINUX_ || _FX_OS_ == _FX_OS_ANDROID_ || \
11     _FX_OS_ == _FX_OS_MACOSX_
12 #include <sys/time.h>
13 #include <time.h>
14 #endif
15 
16 namespace {
17 
18 const uint8_t g_FXDaysPerMonth[12] = {31, 28, 31, 30, 31, 30,
19                                       31, 31, 30, 31, 30, 31};
20 const uint8_t g_FXDaysPerLeapMonth[12] = {31, 29, 31, 30, 31, 30,
21                                           31, 31, 30, 31, 30, 31};
22 const int32_t g_FXDaysBeforeMonth[12] = {0,   31,  59,  90,  120, 151,
23                                          181, 212, 243, 273, 304, 334};
24 const int32_t g_FXDaysBeforeLeapMonth[12] = {0,   31,  60,  91,  121, 152,
25                                              182, 213, 244, 274, 305, 335};
26 const int32_t g_FXDaysPerYear = 365;
27 const int32_t g_FXDaysPerLeapYear = 366;
28 
DaysBeforeMonthInYear(int32_t iYear,uint8_t iMonth)29 int32_t DaysBeforeMonthInYear(int32_t iYear, uint8_t iMonth) {
30   ASSERT(iYear != 0);
31   ASSERT(iMonth >= 1 && iMonth <= 12);
32 
33   const int32_t* p =
34       FX_IsLeapYear(iYear) ? g_FXDaysBeforeLeapMonth : g_FXDaysBeforeMonth;
35   return p[iMonth - 1];
36 }
37 
DaysInYear(int32_t iYear)38 int32_t DaysInYear(int32_t iYear) {
39   ASSERT(iYear != 0);
40   return FX_IsLeapYear(iYear) ? g_FXDaysPerLeapYear : g_FXDaysPerYear;
41 }
42 
DateToDays(int32_t iYear,uint8_t iMonth,uint8_t iDay,bool bIncludeThisDay)43 int64_t DateToDays(int32_t iYear,
44                    uint8_t iMonth,
45                    uint8_t iDay,
46                    bool bIncludeThisDay) {
47   ASSERT(iYear != 0);
48   ASSERT(iMonth >= 1 && iMonth <= 12);
49   ASSERT(iDay >= 1 && iDay <= FX_DaysInMonth(iYear, iMonth));
50 
51   int64_t iDays = DaysBeforeMonthInYear(iYear, iMonth);
52   iDays += iDay;
53   if (!bIncludeThisDay)
54     iDays--;
55 
56   if (iYear > 0) {
57     iYear--;
58   } else {
59     iDays -= DaysInYear(iYear);
60     iYear++;
61   }
62   return iDays + static_cast<int64_t>(iYear) * 365 + iYear / 4 - iYear / 100 +
63          iYear / 400;
64 }
65 
66 struct FXUT_SYSTEMTIME {
67   uint16_t wYear;
68   uint16_t wMonth;
69   uint16_t wDayOfWeek;
70   uint16_t wDay;
71   uint16_t wHour;
72   uint16_t wMinute;
73   uint16_t wSecond;
74   uint16_t wMillisecond;
75 };
76 
77 }  // namespace
78 
FX_DaysInMonth(int32_t iYear,uint8_t iMonth)79 uint8_t FX_DaysInMonth(int32_t iYear, uint8_t iMonth) {
80   ASSERT(iYear != 0);
81   ASSERT(iMonth >= 1 && iMonth <= 12);
82 
83   const uint8_t* p =
84       FX_IsLeapYear(iYear) ? g_FXDaysPerLeapMonth : g_FXDaysPerMonth;
85   return p[iMonth - 1];
86 }
87 
FX_IsLeapYear(int32_t iYear)88 bool FX_IsLeapYear(int32_t iYear) {
89   ASSERT(iYear != 0);
90   return ((iYear % 4) == 0 && (iYear % 100) != 0) || (iYear % 400) == 0;
91 }
92 
93 // static
Now()94 CFX_DateTime CFX_DateTime::Now() {
95   FXUT_SYSTEMTIME utLocal;
96 #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
97   ::GetLocalTime((LPSYSTEMTIME)&utLocal);
98 #else   // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
99   timeval curTime;
100   gettimeofday(&curTime, nullptr);
101 
102   struct tm st;
103   localtime_r(&curTime.tv_sec, &st);
104   utLocal.wYear = st.tm_year + 1900;
105   utLocal.wMonth = st.tm_mon + 1;
106   utLocal.wDayOfWeek = st.tm_wday;
107   utLocal.wDay = st.tm_mday;
108   utLocal.wHour = st.tm_hour;
109   utLocal.wMinute = st.tm_min;
110   utLocal.wSecond = st.tm_sec;
111   utLocal.wMillisecond = curTime.tv_usec / 1000;
112 #endif  // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
113 
114   return CFX_DateTime(utLocal.wYear, static_cast<uint8_t>(utLocal.wMonth),
115                       static_cast<uint8_t>(utLocal.wDay),
116                       static_cast<uint8_t>(utLocal.wHour),
117                       static_cast<uint8_t>(utLocal.wMinute),
118                       static_cast<uint8_t>(utLocal.wSecond),
119                       static_cast<uint16_t>(utLocal.wMillisecond));
120 }
121 
GetDayOfWeek() const122 int32_t CFX_DateTime::GetDayOfWeek() const {
123   int32_t v = static_cast<int32_t>(DateToDays(year_, month_, day_, true) % 7);
124   if (v < 0)
125     v += 7;
126   return v;
127 }
128 
operator ==(const CFX_DateTime & other) const129 bool CFX_DateTime::operator==(const CFX_DateTime& other) const {
130   return year_ == other.year_ && month_ == other.month_ && day_ == other.day_ &&
131          hour_ == other.hour_ && minute_ == other.minute_ &&
132          second_ == other.second_ && millisecond_ == other.millisecond_;
133 }
134