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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
SPDX-FileCopyrightText: 2007 David Nolden <david.nolden.kdevelop@art-master.de>
SPDX-License-Identifier: LGPL-2.0-only
*/
#include "stringhelpers.h"
#include "debuglog.h"
#include <language/duchain/stringhelpers.h>
#include <QChar>
#include <QString>
namespace {
enum { T_ACCESS, T_PAREN, T_BRACKET, T_IDE, T_UNKNOWN, T_TEMP };
}
int Utils::expressionAt(QStringView text, int index)
{
if( index == 0 )
return 0;
int last = T_UNKNOWN;
int start = index;
--index;
while ( index > 0 ) {
while ( index > 0 && text[ index ].isSpace() ) {
--index;
}
QChar ch = text[ index ];
const auto ch2 = index > 0 ? text.sliced(index - 1, 2) : QStringView{};
if ((last != T_IDE) && (ch.isLetterOrNumber() || ch == QLatin1Char('_'))) {
while (index > 0 && (text[index].isLetterOrNumber() || text[index] == QLatin1Char('_'))) {
--index;
}
last = T_IDE;
} else if (last != T_IDE && ch == QLatin1Char(')')) {
int count = 0;
while ( index > 0 ) {
QChar ch = text[ index ];
if (ch == QLatin1Char('(')) {
++count;
} else if (ch == QLatin1Char(')')) {
--count;
}
--index;
if ( count == 0 ) {
//index;
last = T_PAREN;
break;
}
}
} else if (last != T_IDE && ch == QLatin1Char('>') && ch2 != QLatin1String("->")) {
int count = 0;
while ( index > 0 ) {
QChar ch = text[ index ];
if (ch == QLatin1Char('<')) {
++count;
} else if (ch == QLatin1Char('>')) {
--count;
} else if ( count == 0 ) {
//--index;
last = T_TEMP;
break;
}
--index;
}
} else if (ch == QLatin1Char(']')) {
int count = 0;
while ( index > 0 ) {
QChar ch = text[ index ];
if (ch == QLatin1Char('[')) {
++count;
} else if (ch == QLatin1Char(']')) {
--count;
} else if ( count == 0 ) {
//--index;
last = T_BRACKET;
break;
}
--index;
}
} else if (ch == QLatin1Char('.')) {
--index;
last = T_ACCESS;
} else if ( ch2 == QLatin1String("::") ) {
index -= 2;
last = T_ACCESS;
} else if ( ch2 == QLatin1String("->") ) {
index -= 2;
last = T_ACCESS;
} else {
if ( start > index ) {
++index;
}
last = T_UNKNOWN;
break;
}
}
///If we're at the first item, the above algorithm cannot be used safely,
///so just determine whether the sign is valid for the beginning of an expression, if it isn't reject it.
if (index == 0 && start > index &&
!(text[index].isLetterOrNumber() || text[index] == QLatin1Char('_') || text[index] == QLatin1Char(':'))) {
++index;
}
return index;
}
QString Utils::quoteExpression(const QString& expr)
{
return quote(expr, QLatin1Char('"'));
}
QString Utils::unquoteExpression(const QString& expr)
{
return unquote(expr, false);
}
QString Utils::quote(const QString& str, QChar quoteCh)
{
QString res = str;
res.replace(QLatin1Char('\\'), QLatin1String("\\\\")).replace(quoteCh, QLatin1Char('\\') + quoteCh);
return quoteCh + res + quoteCh;
}
QString Utils::unquote(const QString& str, bool unescapeUnicode, QChar quoteCh)
{
if (str.startsWith(quoteCh) && str.endsWith(quoteCh)) {
QString res;
res.reserve(str.length());
bool esc = false;
int type = 0;
QString escSeq;
escSeq.reserve(4);
// skip beginning and ending quoteCh, no need for str = str.mid(1, str.length() - 2)
for (int i = 1; i != str.length() - 1; i++) {
auto ch = str[i];
if (esc) {
switch (ch.unicode()) {
case '\\':
if (type != 0) {
escSeq += ch;
qCDebug(DEBUGGERCOMMON) << "Unrecognized escape sequence:" << escSeq;
res += QLatin1Char('\\');
res += escSeq;
escSeq.clear();
esc = false;
type = 0;
} else {
res.append(QLatin1Char('\\'));
// escSeq.clear(); // escSeq must be empty.
esc = false;
}
break;
case 'u':
case 'x':
if (type != 0 || !unescapeUnicode) {
escSeq += ch;
qCDebug(DEBUGGERCOMMON) << "Unrecognized escape sequence:" << escSeq;
res += QLatin1Char('\\');
res += escSeq;
escSeq.clear();
esc = false;
type = 0;
} else {
type = ch == QLatin1Char('u') ? 1 : 2;
}
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
escSeq += ch;
if (type == 0) {
qCDebug(DEBUGGERCOMMON) << "Unrecognized escape sequence:" << escSeq;
res += QLatin1Char('\\');
res += escSeq;
escSeq.clear();
esc = false;
type = 0;
} else {
// \uNNNN
// \xNN
if (escSeq.length() == (type == 1 ? 4 : 2)) {
// no need to handle error, we know for sure escSeq is '[0-9a-fA-F]+'
auto code = escSeq.toInt(nullptr, 16);
res += QChar(code);
escSeq.clear();
esc = false;
type = 0;
}
}
break;
default:
if (type == 0 && ch == quoteCh) {
res += ch;
} else {
escSeq += ch;
qCDebug(DEBUGGERCOMMON) << "Unrecognized escape sequence:" << escSeq;
res += QLatin1Char('\\');
res += escSeq;
escSeq.clear();
}
esc = false;
type = 0;
break;
}
} else {
if (ch == QLatin1Char('\\')) {
esc = true;
continue;
}
res += ch;
}
}
return res;
} else {
return str;
}
}
|
