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