diff -r 000000000000 -r 6474c204b198 mfbt/decimal/moz-decimal-utils.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mfbt/decimal/moz-decimal-utils.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,113 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZ_DECIMAL_UTILS_H
+#define MOZ_DECIMAL_UTILS_H
+
+// This file contains extra includes, defines and typedefs to allow compilation
+// of Decimal.cpp under the Mozilla source without blink core dependencies. Do
+// not include it into any file other than Decimal.cpp.
+
+#include "../double-conversion/double-conversion.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Casting.h"
+#include "mozilla/FloatingPoint.h"
+#include "mozilla/NullPtr.h"
+
+#include <cmath>
+#include <cstring>
+#include <iomanip>
+#include <limits>
+#include <sstream>
+
+#ifndef UINT64_C
+// For Android toolchain
+#define UINT64_C(c) (c ## ULL)
+#endif
+
+#ifdef ASSERT
+#undef ASSERT
+#endif
+#define ASSERT MOZ_ASSERT
+
+#define ASSERT_NOT_REACHED() MOZ_ASSUME_UNREACHABLE("moz-decimal-utils.h")
+
+#define WTF_MAKE_NONCOPYABLE(ClassName) \
+  private: \
+    ClassName(const ClassName&) MOZ_DELETE; \
+    void operator=(const ClassName&) MOZ_DELETE;
+
+#if defined(_MSC_VER)
+namespace std {
+  inline bool isinf(double num) { return mozilla::IsInfinite(num); }
+  inline bool isnan(double num) { return mozilla::IsNaN(num); }
+  inline bool isfinite(double num) { return mozilla::IsFinite(num); }
+}
+#endif
+
+typedef std::string String;
+
+double mozToDouble(const String &aStr, bool *valid) {
+  double_conversion::StringToDoubleConverter converter(
+    double_conversion::StringToDoubleConverter::NO_FLAGS,
+    mozilla::UnspecifiedNaN<double>(), mozilla::UnspecifiedNaN<double>(), nullptr, nullptr);
+  const char* str = aStr.c_str();
+  int length = mozilla::SafeCast<int>(strlen(str));
+  int processed_char_count; // unused - NO_FLAGS requires the whole string to parse
+  double result = converter.StringToDouble(str, length, &processed_char_count);
+  *valid = mozilla::IsFinite(result);
+  return result;
+}
+
+String mozToString(double aNum) {
+  char buffer[64];
+  int buffer_length = mozilla::ArrayLength(buffer);
+  const double_conversion::DoubleToStringConverter& converter =
+    double_conversion::DoubleToStringConverter::EcmaScriptConverter();
+  double_conversion::StringBuilder builder(buffer, buffer_length);
+  converter.ToShortest(aNum, &builder);
+  return String(builder.Finalize());
+}
+
+String mozToString(int64_t aNum) {
+  std::ostringstream o;
+  o << std::setprecision(std::numeric_limits<int64_t>::digits10) << aNum;
+  return o.str();
+}
+
+String mozToString(uint64_t aNum) {
+  std::ostringstream o;
+  o << std::setprecision(std::numeric_limits<uint64_t>::digits10) << aNum;
+  return o.str();
+}
+
+namespace moz_decimal_utils {
+
+class StringBuilder
+{
+public:
+  void append(char c) {
+    mStr += c;
+  }
+  void appendLiteral(const char *aStr) {
+    mStr += aStr;
+  }
+  void appendNumber(int aNum) {
+    mStr += mozToString(int64_t(aNum));
+  }
+  void append(const String& aStr) {
+    mStr += aStr;
+  }
+  std::string toString() const {
+    return mStr;
+  }
+private:
+  std::string mStr;
+};
+
+} // namespace moz-decimal-utils
+
+#endif
+