1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* 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/WTFExport.h"
#include "wtf/dtoa/double-conversion.h"
#include "wtf/text/Unicode.h"
namespace WTF {
// Size = 80 for sizeof(DtoaBuffer) + some sign bits, decimal point, 'e',
// exponent digits.
const unsigned NumberToStringBufferLength = 96;
typedef char NumberToStringBuffer[NumberToStringBufferLength];
WTF_EXPORT const char* numberToString(double, NumberToStringBuffer);
WTF_EXPORT const char* numberToFixedPrecisionString(double,
unsigned significantFigures,
NumberToStringBuffer);
WTF_EXPORT const char* numberToFixedWidthString(double,
unsigned decimalPlaces,
NumberToStringBuffer);
WTF_EXPORT double parseDouble(const LChar* string,
size_t length,
size_t& parsedLength);
WTF_EXPORT double parseDouble(const UChar* string,
size_t length,
size_t& parsedLength);
namespace Internal {
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 (size_t i = 0; i < length; ++i)
conversionBuffer[i] =
isASCII(string[i]) ? static_cast<LChar>(string[i]) : 0;
return parseDouble(conversionBuffer, length, parsedLength);
}
} // namespace WTF
using WTF::NumberToStringBuffer;
using WTF::numberToString;
using WTF::numberToFixedPrecisionString;
using WTF::numberToFixedWidthString;
using WTF::parseDouble;
#endif // WTF_dtoa_h
|
