Move JS_Value into JS_Define

This CL moves CJS_Return to its own files and moves the remaining
function definitions from JS_Value to JS_Define.

Change-Id: Ic7058a02330153f22d1fff9fc6cdebd9167c498b
Reviewed-on: https://pdfium-review.googlesource.com/17038
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 308 insertions, 0 deletions

diff --git a/fpdfsdk/javascript/JS_Define.cpp b/fpdfsdk/javascript/JS_Define.cpp
new file mode 100644
index 0000000000..18887e636a
--- /dev/null
+++ b/fpdfsdk/javascript/JS_Define.cpp
@@ -0,0 +1,308 @@
+// 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 "fpdfsdk/javascript/JS_Define.h"
+
+#include <time.h>
+
+#include <algorithm>
+#include <cmath>
+#include <limits>
+#include <vector>
+
+#include "fpdfsdk/javascript/cjs_document.h"
+#include "fpdfsdk/javascript/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
+
+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 =
+          CJS_Runtime::CurrentRuntimeFromIsolate(pIsolate)->NewString(
+              str.AsStringView());
+      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;
+}