| /* |
| * 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 <wtf/ASCIICType.h> |
| #include <wtf/dtoa/double-conversion.h> |
| #include <wtf/unicode/Unicode.h> |
| |
| namespace WTF { |
| |
| class Mutex; |
| |
| extern Mutex* s_dtoaP5Mutex; |
| |
| 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); |
| |
| 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); |
| } |
| |
| } // namespace WTF |
| |
| using WTF::NumberToStringBuffer; |
| using WTF::NumberToLStringBuffer; |
| using WTF::numberToString; |
| using WTF::numberToFixedPrecisionString; |
| using WTF::numberToFixedWidthString; |
| using WTF::parseDouble; |
| |
| #endif // WTF_dtoa_h |