blob: d6713fdbb5f69952151e606720658625d12fc30f [file] [log] [blame]
/*
* Copyright (C) 2003-2019 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include <array>
#include <wtf/ASCIICType.h>
#include <wtf/dtoa/double-conversion.h>
#include <wtf/text/StringView.h>
namespace WTF {
// Only toFixed() can use all the 124 positions. The format is:
// <-> + <21 digits> + decimal point + <100 digits> + null char = 124.
using NumberToStringBuffer = std::array<char, 124>;
// <-> + <320 digits> + decimal point + <6 digits> + null char = 329
using NumberToCSSStringBuffer = std::array<char, 329>;
WTF_EXPORT_PRIVATE const char* numberToString(float, NumberToStringBuffer&);
WTF_EXPORT_PRIVATE const char* numberToFixedPrecisionString(float, unsigned significantFigures, NumberToStringBuffer&, bool truncateTrailingZeros = false);
WTF_EXPORT_PRIVATE const char* numberToFixedWidthString(float, unsigned decimalPlaces, NumberToStringBuffer&);
WTF_EXPORT_PRIVATE const char* numberToString(double, NumberToStringBuffer&);
WTF_EXPORT_PRIVATE const char* numberToFixedPrecisionString(double, unsigned significantFigures, NumberToStringBuffer&, bool truncateTrailingZeros = false);
WTF_EXPORT_PRIVATE const char* numberToFixedWidthString(double, unsigned decimalPlaces, NumberToStringBuffer&);
// Fixed width with up to 6 decimal places, trailing zeros truncated.
WTF_EXPORT_PRIVATE const char* numberToCSSString(double, NumberToCSSStringBuffer&);
double parseDouble(const LChar* string, size_t length, size_t& parsedLength);
double parseDouble(const UChar* string, size_t length, size_t& parsedLength);
double parseDouble(StringView, size_t& parsedLength);
namespace Internal {
WTF_EXPORT_PRIVATE double parseDoubleFromLongString(const UChar* string, size_t length, size_t& parsedLength);
}
inline double parseDouble(const LChar* string, size_t length, size_t& parsedLength)
{
return double_conversion::StringToDoubleConverter::StringToDouble(reinterpret_cast<const char*>(string), length, &parsedLength);
}
inline double parseDouble(const UChar* string, size_t length, size_t& parsedLength)
{
const size_t conversionBufferSize = 64;
if (length > conversionBufferSize)
return Internal::parseDoubleFromLongString(string, length, parsedLength);
LChar conversionBuffer[conversionBufferSize];
for (int i = 0; i < static_cast<int>(length); ++i)
conversionBuffer[i] = isASCII(string[i]) ? string[i] : 0;
return parseDouble(conversionBuffer, length, parsedLength);
}
inline double parseDouble(StringView string, size_t& parsedLength)
{
if (string.is8Bit())
return parseDouble(string.characters8(), string.length(), parsedLength);
return parseDouble(string.characters16(), string.length(), parsedLength);
}
} // namespace WTF
using WTF::NumberToStringBuffer;
using WTF::numberToString;
using WTF::numberToFixedPrecisionString;
using WTF::numberToFixedWidthString;
using WTF::parseDouble;