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/*
* Copyright (C) 2003, 2008, 2012 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.
*
*/
#ifndef WTF_dtoa_h
#define WTF_dtoa_h
#include <unicode/utypes.h>
#include <wtf/ASCIICType.h>
#include <wtf/dtoa/double-conversion.h>
#include <wtf/text/StringView.h>
namespace WTF {
typedef char DtoaBuffer[80];
WTF_EXPORT_PRIVATE void dtoa(DtoaBuffer result, double dd, bool& sign, int& exponent, unsigned& precision);
WTF_EXPORT_PRIVATE void dtoaRoundSF(DtoaBuffer result, double dd, int ndigits, bool& sign, int& exponent, unsigned& precision);
WTF_EXPORT_PRIVATE void dtoaRoundDP(DtoaBuffer result, double dd, int ndigits, bool& sign, int& exponent, unsigned& precision);
// Size = 80 for sizeof(DtoaBuffer) + some sign bits, decimal point, 'e', exponent digits.
const unsigned NumberToStringBufferLength = 96;
typedef char NumberToStringBuffer[NumberToStringBufferLength];
typedef LChar NumberToLStringBuffer[NumberToStringBufferLength];
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);
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::NumberToLStringBuffer;
using WTF::numberToString;
using WTF::numberToFixedPrecisionString;
using WTF::numberToFixedWidthString;
using WTF::parseDouble;
#endif // WTF_dtoa_h