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1 /* | |
2 * Copyright (C) 2003, 2008, 2012 Apple Inc. All rights reserved. | |
3 * | |
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. | |
8 * | |
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. | |
13 * | |
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. | |
18 * | |
19 */ | |
20 | |
21 #ifndef WTF_dtoa_h | |
22 #define WTF_dtoa_h | |
23 | |
24 #include <wtf/ASCIICType.h> | |
25 #include <wtf/dtoa/double-conversion.h> | |
26 #include <wtf/unicode/Unicode.h> | |
27 | |
28 namespace WTF { | |
29 | |
30 class Mutex; | |
31 | |
32 extern Mutex* s_dtoaP5Mutex; | |
33 | |
34 typedef char DtoaBuffer[80]; | |
35 | |
36 WTF_EXPORT_PRIVATE void dtoa(DtoaBuffer result, double dd, bool& sign, int& expo
nent, unsigned& precision); | |
37 WTF_EXPORT_PRIVATE void dtoaRoundSF(DtoaBuffer result, double dd, int ndigits, b
ool& sign, int& exponent, unsigned& precision); | |
38 WTF_EXPORT_PRIVATE void dtoaRoundDP(DtoaBuffer result, double dd, int ndigits, b
ool& sign, int& exponent, unsigned& precision); | |
39 | |
40 // Size = 80 for sizeof(DtoaBuffer) + some sign bits, decimal point, 'e', expone
nt digits. | |
41 const unsigned NumberToStringBufferLength = 96; | |
42 typedef char NumberToStringBuffer[NumberToStringBufferLength]; | |
43 typedef LChar NumberToLStringBuffer[NumberToStringBufferLength]; | |
44 | |
45 WTF_EXPORT_PRIVATE const char* numberToString(double, NumberToStringBuffer); | |
46 WTF_EXPORT_PRIVATE const char* numberToFixedPrecisionString(double, unsigned sig
nificantFigures, NumberToStringBuffer, bool truncateTrailingZeros = false); | |
47 WTF_EXPORT_PRIVATE const char* numberToFixedWidthString(double, unsigned decimal
Places, NumberToStringBuffer); | |
48 | |
49 double parseDouble(const LChar* string, size_t length, size_t& parsedLength); | |
50 double parseDouble(const UChar* string, size_t length, size_t& parsedLength); | |
51 | |
52 namespace Internal { | |
53 WTF_EXPORT_PRIVATE double parseDoubleFromLongString(const UChar* string, siz
e_t length, size_t& parsedLength); | |
54 } | |
55 | |
56 inline double parseDouble(const LChar* string, size_t length, size_t& parsedLeng
th) | |
57 { | |
58 return double_conversion::StringToDoubleConverter::StringToDouble(reinterpre
t_cast<const char*>(string), length, &parsedLength); | |
59 } | |
60 | |
61 inline double parseDouble(const UChar* string, size_t length, size_t& parsedLeng
th) | |
62 { | |
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); | |
70 } | |
71 | |
72 } // namespace WTF | |
73 | |
74 using WTF::NumberToStringBuffer; | |
75 using WTF::NumberToLStringBuffer; | |
76 using WTF::numberToString; | |
77 using WTF::numberToFixedPrecisionString; | |
78 using WTF::numberToFixedWidthString; | |
79 using WTF::parseDouble; | |
80 | |
81 #endif // WTF_dtoa_h | |
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