| // Copyright 2014 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 "fxjs/js_define.h" |
| |
| #include <time.h> |
| |
| #include <algorithm> |
| #include <cmath> |
| #include <limits> |
| #include <vector> |
| |
| #include "fxjs/cjs_document.h" |
| #include "fxjs/cjs_object.h" |
| |
| namespace { |
| |
| double GetLocalTZA() { |
| if (!FSDK_IsSandBoxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS)) |
| return 0; |
| time_t t = 0; |
| time(&t); |
| localtime(&t); |
| #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ |
| // In gcc 'timezone' is a global variable declared in time.h. In VC++, that |
| // variable was removed in VC++ 2015, with _get_timezone replacing it. |
| long timezone = 0; |
| _get_timezone(&timezone); |
| #endif // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ |
| return (double)(-(timezone * 1000)); |
| } |
| |
| int GetDaylightSavingTA(double d) { |
| if (!FSDK_IsSandBoxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS)) |
| return 0; |
| time_t t = (time_t)(d / 1000); |
| struct tm* tmp = localtime(&t); |
| if (!tmp) |
| return 0; |
| if (tmp->tm_isdst > 0) |
| // One hour. |
| return (int)60 * 60 * 1000; |
| return 0; |
| } |
| |
| double Mod(double x, double y) { |
| double r = fmod(x, y); |
| if (r < 0) |
| r += y; |
| return r; |
| } |
| |
| bool IsLeapYear(int year) { |
| return (year % 4 == 0) && ((year % 100 != 0) || (year % 400 != 0)); |
| } |
| |
| int DayFromYear(int y) { |
| return (int)(365 * (y - 1970.0) + floor((y - 1969.0) / 4) - |
| floor((y - 1901.0) / 100) + floor((y - 1601.0) / 400)); |
| } |
| |
| double TimeFromYear(int y) { |
| return 86400000.0 * DayFromYear(y); |
| } |
| |
| static const uint16_t daysMonth[12] = {0, 31, 59, 90, 120, 151, |
| 181, 212, 243, 273, 304, 334}; |
| static const uint16_t leapDaysMonth[12] = {0, 31, 60, 91, 121, 152, |
| 182, 213, 244, 274, 305, 335}; |
| |
| double TimeFromYearMonth(int y, int m) { |
| const uint16_t* pMonth = IsLeapYear(y) ? leapDaysMonth : daysMonth; |
| return TimeFromYear(y) + ((double)pMonth[m]) * 86400000; |
| } |
| |
| int Day(double t) { |
| return static_cast<int>(floor(t / 86400000.0)); |
| } |
| |
| int YearFromTime(double t) { |
| // estimate the time. |
| int y = 1970 + static_cast<int>(t / (365.2425 * 86400000.0)); |
| if (TimeFromYear(y) <= t) { |
| while (TimeFromYear(y + 1) <= t) |
| y++; |
| } else { |
| while (TimeFromYear(y) > t) |
| y--; |
| } |
| return y; |
| } |
| |
| int DayWithinYear(double t) { |
| int year = YearFromTime(t); |
| int day = Day(t); |
| return day - DayFromYear(year); |
| } |
| |
| int MonthFromTime(double t) { |
| int day = DayWithinYear(t); |
| int year = YearFromTime(t); |
| if (0 <= day && day < 31) |
| return 0; |
| if (31 <= day && day < 59 + IsLeapYear(year)) |
| return 1; |
| if ((59 + IsLeapYear(year)) <= day && day < (90 + IsLeapYear(year))) |
| return 2; |
| if ((90 + IsLeapYear(year)) <= day && day < (120 + IsLeapYear(year))) |
| return 3; |
| if ((120 + IsLeapYear(year)) <= day && day < (151 + IsLeapYear(year))) |
| return 4; |
| if ((151 + IsLeapYear(year)) <= day && day < (181 + IsLeapYear(year))) |
| return 5; |
| if ((181 + IsLeapYear(year)) <= day && day < (212 + IsLeapYear(year))) |
| return 6; |
| if ((212 + IsLeapYear(year)) <= day && day < (243 + IsLeapYear(year))) |
| return 7; |
| if ((243 + IsLeapYear(year)) <= day && day < (273 + IsLeapYear(year))) |
| return 8; |
| if ((273 + IsLeapYear(year)) <= day && day < (304 + IsLeapYear(year))) |
| return 9; |
| if ((304 + IsLeapYear(year)) <= day && day < (334 + IsLeapYear(year))) |
| return 10; |
| if ((334 + IsLeapYear(year)) <= day && day < (365 + IsLeapYear(year))) |
| return 11; |
| |
| return -1; |
| } |
| |
| int DateFromTime(double t) { |
| int day = DayWithinYear(t); |
| int year = YearFromTime(t); |
| int leap = IsLeapYear(year); |
| int month = MonthFromTime(t); |
| switch (month) { |
| case 0: |
| return day + 1; |
| case 1: |
| return day - 30; |
| case 2: |
| return day - 58 - leap; |
| case 3: |
| return day - 89 - leap; |
| case 4: |
| return day - 119 - leap; |
| case 5: |
| return day - 150 - leap; |
| case 6: |
| return day - 180 - leap; |
| case 7: |
| return day - 211 - leap; |
| case 8: |
| return day - 242 - leap; |
| case 9: |
| return day - 272 - leap; |
| case 10: |
| return day - 303 - leap; |
| case 11: |
| return day - 333 - leap; |
| default: |
| return 0; |
| } |
| } |
| |
| } // namespace |
| |
| void JSDestructor(v8::Local<v8::Object> obj) { |
| CFXJS_Engine::SetObjectPrivate(obj, nullptr); |
| } |
| |
| double JS_GetDateTime() { |
| if (!FSDK_IsSandBoxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS)) |
| return 0; |
| time_t t = time(nullptr); |
| struct tm* pTm = localtime(&t); |
| |
| int year = pTm->tm_year + 1900; |
| double t1 = TimeFromYear(year); |
| |
| return t1 + pTm->tm_yday * 86400000.0 + pTm->tm_hour * 3600000.0 + |
| pTm->tm_min * 60000.0 + pTm->tm_sec * 1000.0; |
| } |
| |
| int JS_GetYearFromTime(double dt) { |
| return YearFromTime(dt); |
| } |
| |
| int JS_GetMonthFromTime(double dt) { |
| return MonthFromTime(dt); |
| } |
| |
| int JS_GetDayFromTime(double dt) { |
| return DateFromTime(dt); |
| } |
| |
| int JS_GetHourFromTime(double dt) { |
| return (int)Mod(floor(dt / (60 * 60 * 1000)), 24); |
| } |
| |
| int JS_GetMinFromTime(double dt) { |
| return (int)Mod(floor(dt / (60 * 1000)), 60); |
| } |
| |
| int JS_GetSecFromTime(double dt) { |
| return (int)Mod(floor(dt / 1000), 60); |
| } |
| |
| double JS_LocalTime(double d) { |
| return d + GetLocalTZA() + GetDaylightSavingTA(d); |
| } |
| |
| double JS_DateParse(const WideString& str) { |
| v8::Isolate* pIsolate = v8::Isolate::GetCurrent(); |
| v8::Isolate::Scope isolate_scope(pIsolate); |
| v8::HandleScope scope(pIsolate); |
| |
| v8::Local<v8::Context> context = pIsolate->GetCurrentContext(); |
| |
| // Use the built-in object method. |
| v8::Local<v8::Value> v = |
| context->Global() |
| ->Get(context, v8::String::NewFromUtf8(pIsolate, "Date", |
| v8::NewStringType::kNormal) |
| .ToLocalChecked()) |
| .ToLocalChecked(); |
| if (v->IsObject()) { |
| v8::Local<v8::Object> o = v->ToObject(context).ToLocalChecked(); |
| v = o->Get(context, v8::String::NewFromUtf8(pIsolate, "parse", |
| v8::NewStringType::kNormal) |
| .ToLocalChecked()) |
| .ToLocalChecked(); |
| if (v->IsFunction()) { |
| v8::Local<v8::Function> funC = v8::Local<v8::Function>::Cast(v); |
| const int argc = 1; |
| v8::Local<v8::Value> timeStr = |
| v8::String::NewFromUtf8(pIsolate, |
| FX_UTF8Encode(str.AsStringView()).c_str(), |
| v8::NewStringType::kNormal) |
| .ToLocalChecked(); |
| v8::Local<v8::Value> argv[argc] = {timeStr}; |
| v = funC->Call(context, context->Global(), argc, argv).ToLocalChecked(); |
| if (v->IsNumber()) { |
| double date = v->ToNumber(context).ToLocalChecked()->Value(); |
| if (!std::isfinite(date)) |
| return date; |
| return JS_LocalTime(date); |
| } |
| } |
| } |
| return 0; |
| } |
| |
| double JS_MakeDay(int nYear, int nMonth, int nDate) { |
| double y = static_cast<double>(nYear); |
| double m = static_cast<double>(nMonth); |
| double dt = static_cast<double>(nDate); |
| double ym = y + floor(m / 12); |
| double mn = Mod(m, 12); |
| double t = TimeFromYearMonth(static_cast<int>(ym), static_cast<int>(mn)); |
| if (YearFromTime(t) != ym || MonthFromTime(t) != mn || DateFromTime(t) != 1) |
| return std::nan(""); |
| |
| return Day(t) + dt - 1; |
| } |
| |
| double JS_MakeTime(int nHour, int nMin, int nSec, int nMs) { |
| double h = static_cast<double>(nHour); |
| double m = static_cast<double>(nMin); |
| double s = static_cast<double>(nSec); |
| double milli = static_cast<double>(nMs); |
| return h * 3600000 + m * 60000 + s * 1000 + milli; |
| } |
| |
| double JS_MakeDate(double day, double time) { |
| if (!std::isfinite(day) || !std::isfinite(time)) |
| return std::nan(""); |
| |
| return day * 86400000 + time; |
| } |
| |
| std::vector<v8::Local<v8::Value>> ExpandKeywordParams( |
| CJS_Runtime* pRuntime, |
| const std::vector<v8::Local<v8::Value>>& originals, |
| size_t nKeywords, |
| ...) { |
| ASSERT(nKeywords); |
| |
| std::vector<v8::Local<v8::Value>> result(nKeywords, v8::Local<v8::Value>()); |
| size_t size = std::min(originals.size(), nKeywords); |
| for (size_t i = 0; i < size; ++i) |
| result[i] = originals[i]; |
| |
| if (originals.size() != 1 || !originals[0]->IsObject() || |
| originals[0]->IsArray()) { |
| return result; |
| } |
| result[0] = v8::Local<v8::Value>(); // Make unknown. |
| |
| v8::Local<v8::Object> pObj = pRuntime->ToObject(originals[0]); |
| va_list ap; |
| va_start(ap, nKeywords); |
| for (size_t i = 0; i < nKeywords; ++i) { |
| const wchar_t* property = va_arg(ap, const wchar_t*); |
| v8::Local<v8::Value> v8Value = pRuntime->GetObjectProperty(pObj, property); |
| if (!v8Value->IsUndefined()) |
| result[i] = v8Value; |
| } |
| va_end(ap); |
| |
| return result; |
| } |