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// 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;
}