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