Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef MOZ_DECIMAL_UTILS_H
       7             : #define MOZ_DECIMAL_UTILS_H
       8             : 
       9             : // This file contains extra includes, defines and typedefs to allow compilation
      10             : // of Decimal.cpp under the Mozilla source without blink core dependencies. Do
      11             : // not include it into any file other than Decimal.cpp.
      12             : 
      13             : #include "../double-conversion/source/double-conversion.h"
      14             : #include "mozilla/ArrayUtils.h"
      15             : #include "mozilla/Casting.h"
      16             : #include "mozilla/FloatingPoint.h"
      17             : 
      18             : #include <cmath>
      19             : #include <cstring>
      20             : #include <iomanip>
      21             : #include <limits>
      22             : #include <sstream>
      23             : 
      24             : #ifndef UINT64_C
      25             : // For Android toolchain
      26             : #define UINT64_C(c) (c ## ULL)
      27             : #endif
      28             : 
      29             : #ifdef ASSERT
      30             : #undef ASSERT
      31             : #endif
      32             : #define ASSERT MOZ_ASSERT
      33             : 
      34             : #define ASSERT_NOT_REACHED() MOZ_ASSERT_UNREACHABLE("moz-decimal-utils.h")
      35             : 
      36             : #define STACK_ALLOCATED() DISALLOW_NEW()
      37             : 
      38             : #define WTF_MAKE_NONCOPYABLE(ClassName) \
      39             :   private: \
      40             :     ClassName(const ClassName&) = delete; \
      41             :     void operator=(const ClassName&) = delete;
      42             : 
      43             : typedef std::string String;
      44             : 
      45           0 : double mozToDouble(const String &aStr, bool *valid) {
      46             :   double_conversion::StringToDoubleConverter converter(
      47             :     double_conversion::StringToDoubleConverter::NO_FLAGS,
      48           0 :     mozilla::UnspecifiedNaN<double>(), mozilla::UnspecifiedNaN<double>(), nullptr, nullptr);
      49           0 :   const char* str = aStr.c_str();
      50           0 :   int length = mozilla::AssertedCast<int>(strlen(str));
      51             :   int processed_char_count; // unused - NO_FLAGS requires the whole string to parse
      52           0 :   double result = converter.StringToDouble(str, length, &processed_char_count);
      53           0 :   *valid = mozilla::IsFinite(result);
      54           0 :   return result;
      55             : }
      56             : 
      57           0 : String mozToString(double aNum) {
      58             :   char buffer[64];
      59           0 :   int buffer_length = mozilla::ArrayLength(buffer);
      60             :   const double_conversion::DoubleToStringConverter& converter =
      61           0 :     double_conversion::DoubleToStringConverter::EcmaScriptConverter();
      62           0 :   double_conversion::StringBuilder builder(buffer, buffer_length);
      63           0 :   converter.ToShortest(aNum, &builder);
      64           0 :   return String(builder.Finalize());
      65             : }
      66             : 
      67           0 : String mozToString(int64_t aNum) {
      68           0 :   std::ostringstream o;
      69           0 :   o << std::setprecision(std::numeric_limits<int64_t>::digits10) << aNum;
      70           0 :   return o.str();
      71             : }
      72             : 
      73           0 : String mozToString(uint64_t aNum) {
      74           0 :   std::ostringstream o;
      75           0 :   o << std::setprecision(std::numeric_limits<uint64_t>::digits10) << aNum;
      76           0 :   return o.str();
      77             : }
      78             : 
      79             : namespace moz_decimal_utils {
      80             : 
      81           0 : class StringBuilder
      82             : {
      83             : public:
      84           0 :   void append(char c) {
      85           0 :     mStr += c;
      86           0 :   }
      87           0 :   void appendLiteral(const char *aStr) {
      88           0 :     mStr += aStr;
      89           0 :   }
      90           0 :   void appendNumber(int aNum) {
      91           0 :     mStr += mozToString(int64_t(aNum));
      92           0 :   }
      93           0 :   void append(const String& aStr) {
      94           0 :     mStr += aStr;
      95           0 :   }
      96           0 :   std::string toString() const {
      97           0 :     return mStr;
      98             :   }
      99             : private:
     100             :   std::string mStr;
     101             : };
     102             : 
     103             : } // namespace moz_decimal_utils
     104             : 
     105             : #endif
     106             :