The Tor Browser: mfbt/decimal/moz-decimal-utils.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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/. */

     6 #ifndef MOZ_DECIMAL_UTILS_H

     7 #define MOZ_DECIMAL_UTILS_H

     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.

    13 #include "../double-conversion/double-conversion.h"

    14 #include "mozilla/ArrayUtils.h"

    15 #include "mozilla/Casting.h"

    16 #include "mozilla/FloatingPoint.h"

    17 #include "mozilla/NullPtr.h"

    19 #include <cmath>

    20 #include <cstring>

    21 #include <iomanip>

    22 #include <limits>

    23 #include <sstream>

    25 #ifndef UINT64_C

    26 // For Android toolchain

    27 #define UINT64_C(c) (c ## ULL)

    28 #endif

    30 #ifdef ASSERT

    31 #undef ASSERT

    32 #endif

    33 #define ASSERT MOZ_ASSERT

    35 #define ASSERT_NOT_REACHED() MOZ_ASSUME_UNREACHABLE("moz-decimal-utils.h")

    37 #define WTF_MAKE_NONCOPYABLE(ClassName) \

    38   private: \

    39     ClassName(const ClassName&) MOZ_DELETE; \

    40     void operator=(const ClassName&) MOZ_DELETE;

    42 #if defined(_MSC_VER)

    43 namespace std {

    44   inline bool isinf(double num) { return mozilla::IsInfinite(num); }

    45   inline bool isnan(double num) { return mozilla::IsNaN(num); }

    46   inline bool isfinite(double num) { return mozilla::IsFinite(num); }

    47 }

    48 #endif

    50 typedef std::string String;

    52 double mozToDouble(const String &aStr, bool *valid) {

    53   double_conversion::StringToDoubleConverter converter(

    54     double_conversion::StringToDoubleConverter::NO_FLAGS,

    55     mozilla::UnspecifiedNaN<double>(), mozilla::UnspecifiedNaN<double>(), nullptr, nullptr);

    56   const char* str = aStr.c_str();

    57   int length = mozilla::SafeCast<int>(strlen(str));

    58   int processed_char_count; // unused - NO_FLAGS requires the whole string to parse

    59   double result = converter.StringToDouble(str, length, &processed_char_count);

    60   *valid = mozilla::IsFinite(result);

    61   return result;

    62 }

    64 String mozToString(double aNum) {

    65   char buffer[64];

    66   int buffer_length = mozilla::ArrayLength(buffer);

    67   const double_conversion::DoubleToStringConverter& converter =

    68     double_conversion::DoubleToStringConverter::EcmaScriptConverter();

    69   double_conversion::StringBuilder builder(buffer, buffer_length);

    70   converter.ToShortest(aNum, &builder);

    71   return String(builder.Finalize());

    72 }

    74 String mozToString(int64_t aNum) {

    75   std::ostringstream o;

    76   o << std::setprecision(std::numeric_limits<int64_t>::digits10) << aNum;

    77   return o.str();

    78 }

    80 String mozToString(uint64_t aNum) {

    81   std::ostringstream o;

    82   o << std::setprecision(std::numeric_limits<uint64_t>::digits10) << aNum;

    83   return o.str();

    84 }

    86 namespace moz_decimal_utils {

    88 class StringBuilder

    89 {

    90 public:

    91   void append(char c) {

    92     mStr += c;

    93   }

    94   void appendLiteral(const char *aStr) {

    95     mStr += aStr;

    96   }

    97   void appendNumber(int aNum) {

    98     mStr += mozToString(int64_t(aNum));

    99   }

   100   void append(const String& aStr) {

   101     mStr += aStr;

   102   }

   103   std::string toString() const {

   104     return mStr;

   105   }

   106 private:

   107   std::string mStr;

   108 };

   110 } // namespace moz-decimal-utils

   112 #endif

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