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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
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 qscriptconverter_p_h
#define qscriptconverter_p_h
#include "qscriptvalue.h"
#include <JavaScriptCore/JavaScript.h>
#include <QtCore/qglobal.h>
#include <QtCore/qnumeric.h>
#include <QtCore/qstring.h>
#include <QtCore/qvarlengtharray.h>
extern char *qdtoa(double d, int mode, int ndigits, int *decpt, int *sign, char **rve, char **digits_str);
/*
\internal
\class QScriptConverter
QScriptValue and QScriptEngine helper class. This class's responsibility is to convert values
between JS values and Qt/C++ values.
This is a nice way to inline these functions in both QScriptValue and QScriptEngine.
*/
class QScriptConverter {
public:
static quint32 toArrayIndex(const JSStringRef jsstring)
{
// FIXME this function should be exported by JSC C API.
QString qstring = toString(jsstring);
bool ok;
quint32 idx = qstring.toUInt(&ok);
if (!ok || toString(idx) != qstring)
idx = 0xffffffff;
return idx;
}
static QString toString(const JSStringRef str)
{
return QString(reinterpret_cast<const QChar*>(JSStringGetCharactersPtr(str)), JSStringGetLength(str));
}
static JSStringRef toString(const QString& str)
{
return JSStringCreateWithUTF8CString(str.toUtf8().constData());
}
static JSStringRef toString(const char* str)
{
return JSStringCreateWithUTF8CString(str);
}
static QString toString(double value)
{
// FIXME this should be easier. The ideal fix is to create
// a new function in JSC C API which could cover the functionality.
if (qIsNaN(value))
return QString::fromLatin1("NaN");
if (qIsInf(value))
return QString::fromLatin1(value < 0 ? "-Infinity" : "Infinity");
if (!value)
return QString::fromLatin1("0");
QVarLengthArray<char, 25> buf;
int decpt;
int sign;
char* result = 0;
char* endresult;
(void)qdtoa(value, 0, 0, &decpt, &sign, &endresult, &result);
if (!result)
return QString();
int resultLen = endresult - result;
if (decpt <= 0 && decpt > -6) {
buf.resize(-decpt + 2 + sign);
qMemSet(buf.data(), '0', -decpt + 2 + sign);
if (sign) // fix the sign.
buf[0] = '-';
buf[sign + 1] = '.';
buf.append(result, resultLen);
} else {
if (sign)
buf.append('-');
int length = buf.size() - sign + resultLen;
if (decpt <= 21 && decpt > 0) {
if (length <= decpt) {
const char* zeros = "0000000000000000000000000";
buf.append(result, resultLen);
buf.append(zeros, decpt - length);
} else {
buf.append(result, decpt);
buf.append('.');
buf.append(result + decpt, resultLen - decpt);
}
} else if (result[0] >= '0' && result[0] <= '9') {
if (length > 1) {
buf.append(result, 1);
buf.append('.');
buf.append(result + 1, resultLen - 1);
} else
buf.append(result, resultLen);
buf.append('e');
buf.append(decpt >= 0 ? '+' : '-');
int e = qAbs(decpt - 1);
if (e >= 100)
buf.append('0' + e / 100);
if (e >= 10)
buf.append('0' + (e % 100) / 10);
buf.append('0' + e % 10);
}
}
free(result);
buf.append(0);
return QString::fromLatin1(buf.constData());
}
static JSPropertyAttributes toPropertyFlags(const QFlags<QScriptValue::PropertyFlag>& flags)
{
JSPropertyAttributes attr = 0;
if (flags.testFlag(QScriptValue::ReadOnly))
attr |= kJSPropertyAttributeReadOnly;
if (flags.testFlag(QScriptValue::Undeletable))
attr |= kJSPropertyAttributeDontDelete;
if (flags.testFlag(QScriptValue::SkipInEnumeration))
attr |= kJSPropertyAttributeDontEnum;
return attr;
}
};
#endif // qscriptconverter_p_h
|
