2 * Copyright (C) 2003, 2008, 2012 Apple Inc. All rights reserved.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
24 #include <wtf/ASCIICType.h>
25 #include <wtf/dtoa/double-conversion.h>
26 #include <wtf/unicode/Unicode.h>
32 extern Mutex* s_dtoaP5Mutex;
34 typedef char DtoaBuffer[80];
36 WTF_EXPORT_PRIVATE void dtoa(DtoaBuffer result, double dd, bool& sign, int& exponent, unsigned& precision);
37 WTF_EXPORT_PRIVATE void dtoaRoundSF(DtoaBuffer result, double dd, int ndigits, bool& sign, int& exponent, unsigned& precision);
38 WTF_EXPORT_PRIVATE void dtoaRoundDP(DtoaBuffer result, double dd, int ndigits, bool& sign, int& exponent, unsigned& precision);
40 // Size = 80 for sizeof(DtoaBuffer) + some sign bits, decimal point, 'e', exponent digits.
41 const unsigned NumberToStringBufferLength = 96;
42 typedef char NumberToStringBuffer[NumberToStringBufferLength];
43 typedef UChar NumberToUStringBuffer[NumberToStringBufferLength];
45 WTF_EXPORT_PRIVATE const char* numberToString(double, NumberToStringBuffer);
46 const char* numberToFixedPrecisionString(double, unsigned significantFigures, NumberToStringBuffer, bool truncateTrailingZeros = false);
47 const char* numberToFixedWidthString(double, unsigned decimalPlaces, NumberToStringBuffer);
49 double parseDouble(const LChar* string, size_t length, size_t& parsedLength);
50 double parseDouble(const UChar* string, size_t length, size_t& parsedLength);
53 WTF_EXPORT_PRIVATE double parseDoubleFromLongString(const UChar* string, size_t length, size_t& parsedLength);
56 inline double parseDouble(const LChar* string, size_t length, size_t& parsedLength)
58 return double_conversion::StringToDoubleConverter::StringToDouble(reinterpret_cast<const char*>(string), length, &parsedLength);
61 inline double parseDouble(const UChar* string, size_t length, size_t& parsedLength)
63 const size_t conversionBufferSize = 64;
64 if (length > conversionBufferSize)
65 return Internal::parseDoubleFromLongString(string, length, parsedLength);
66 LChar conversionBuffer[conversionBufferSize];
67 for (int i = 0; i < static_cast<int>(length); ++i)
68 conversionBuffer[i] = isASCII(string[i]) ? string[i] : 0;
69 return parseDouble(conversionBuffer, length, parsedLength);
74 using WTF::NumberToStringBuffer;
75 using WTF::NumberToUStringBuffer;
76 using WTF::numberToString;
77 using WTF::numberToFixedPrecisionString;
78 using WTF::numberToFixedWidthString;
79 using WTF::parseDouble;