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
147
|
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef SYMBOLS_H
#define SYMBOLS_H
#include "token.h"
#include <QString>
#include <QHash>
#include <QVector>
#include <QDebug>
QT_BEGIN_NAMESPACE
//#define USE_LEXEM_STORE
struct SubArray
{
inline SubArray():from(0),len(-1){}
inline SubArray(const QByteArray &a):array(a),from(0), len(a.size()){}
inline SubArray(const char *s):array(s),from(0) { len = array.size(); }
inline SubArray(const QByteArray &a, int from, int len):array(a), from(from), len(len){}
QByteArray array;
int from, len;
inline bool operator==(const SubArray &other) const {
if (len != other.len)
return false;
for (int i = 0; i < len; ++i)
if (array.at(from + i) != other.array.at(other.from + i))
return false;
return true;
}
};
inline uint qHash(const SubArray &key)
{
const uchar *p = reinterpret_cast<const uchar *>(key.array.data() + key.from);
int n = key.len;
uint h = 0;
uint g;
while (n--) {
h = (h << 4) + *p++;
if ((g = (h & 0xf0000000)) != 0)
h ^= g >> 23;
h &= ~g;
}
return h;
}
struct Symbol
{
#ifdef USE_LEXEM_STORE
typedef QHash<SubArray, QHashDummyValue> LexemStore;
static LexemStore lexemStore;
inline Symbol() : lineNum(-1),token(NOTOKEN){}
inline Symbol(int lineNum, Token token):
lineNum(lineNum), token(token){}
inline Symbol(int lineNum, Token token, const QByteArray &lexem):
lineNum(lineNum), token(token),lex(lexem){}
inline Symbol(int lineNum, Token token, const QByteArray &lexem, int from, int len):
lineNum(lineNum), token(token){
LexemStore::const_iterator it = lexemStore.constFind(SubArray(lexem, from, len));
if (it != lexemStore.constEnd()) {
lex = it.key().array;
} else {
lex = lexem.mid(from, len);
lexemStore.insert(lex, QHashDummyValue());
}
}
int lineNum;
Token token;
inline QByteArray unquotedLexem() const { return lex.mid(1, lex.length()-2); }
inline QByteArray lexem() const { return lex; }
inline operator QByteArray() const { return lex; }
QByteArray lex;
#else
inline Symbol() : lineNum(-1),token(NOTOKEN), from(0),len(-1) {}
inline Symbol(int lineNum, Token token):
lineNum(lineNum), token(token), from(0), len(-1) {}
inline Symbol(int lineNum, Token token, const QByteArray &lexem):
lineNum(lineNum), token(token), lex(lexem), from(0) { len = lex.size(); }
inline Symbol(int lineNum, Token token, const QByteArray &lexem, int from, int len):
lineNum(lineNum), token(token),lex(lexem),from(from), len(len){}
int lineNum;
Token token;
inline QByteArray lexem() const { return lex.mid(from, len); }
inline QByteArray unquotedLexem() const { return lex.mid(from+1, len-2); }
inline operator QByteArray() const { return lex.mid(from, len); }
inline operator SubArray() const { return SubArray(lex, from, len); }
QByteArray lex;
int from, len;
#endif
};
Q_DECLARE_TYPEINFO(Symbol, Q_MOVABLE_TYPE);
typedef QVector<Symbol> Symbols;
QT_END_NAMESPACE
#endif // SYMBOLS_H
|
