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 LChar NumberToLStringBuffer[NumberToStringBufferLength];
45
WTF_EXPORT_PRIVATE const char* numberToString(double, NumberToStringBuffer);
46
WTF_EXPORT_PRIVATE const char* numberToFixedPrecisionString(double, unsigned significantFigures, NumberToStringBuffer, bool truncateTrailingZeros = false);
47
WTF_EXPORT_PRIVATE 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::NumberToLStringBuffer;
76
using WTF::numberToString;
77
using WTF::numberToFixedPrecisionString;
78
using WTF::numberToFixedWidthString;
79
using WTF::parseDouble;