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
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
|
// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include <QTest>
#include <QtCore/QLatin1StringMatcher>
#include <numeric>
#include <string>
#if QT_CONFIG(cxx11_future)
# include <thread>
#endif
// COM interface
#if defined(interface)
# undef interface
#endif
using namespace Qt::Literals::StringLiterals;
class tst_QLatin1StringMatcher : public QObject
{
Q_OBJECT
private slots:
void overloads();
void interface();
void indexIn();
void haystacksWithMoreThan4GiBWork();
};
void tst_QLatin1StringMatcher::overloads()
{
QLatin1StringView hello = "hello"_L1;
QByteArray hello2B = QByteArrayView(hello).toByteArray().repeated(2);
QLatin1StringView hello2(hello2B);
{
QLatin1StringMatcher m("hello"_L1, Qt::CaseSensitive);
QCOMPARE(m.pattern(), "hello"_L1);
QCOMPARE(m.indexIn("hello"_L1), 0);
QCOMPARE(m.indexIn("Hello"_L1), -1);
QCOMPARE(m.indexIn("Hellohello"_L1), 5);
QCOMPARE(m.indexIn("helloHello"_L1), 0);
QCOMPARE(m.indexIn("helloHello"_L1, 1), -1);
}
{
QLatin1StringMatcher m("Hello"_L1, Qt::CaseSensitive);
QCOMPARE(m.pattern(), "Hello"_L1);
QCOMPARE(m.indexIn("hello"_L1), -1);
QCOMPARE(m.indexIn("Hello"_L1), 0);
QCOMPARE(m.indexIn("Hellohello"_L1), 0);
QCOMPARE(m.indexIn("helloHello"_L1), 5);
QCOMPARE(m.indexIn("helloHello"_L1, 6), -1);
}
{
QLatin1StringMatcher m("hello"_L1, Qt::CaseInsensitive);
QCOMPARE(m.pattern(), "hello"_L1);
QCOMPARE(m.indexIn("hello"_L1), 0);
QCOMPARE(m.indexIn("Hello"_L1), 0);
QCOMPARE(m.indexIn("Hellohello"_L1), 0);
QCOMPARE(m.indexIn("helloHello"_L1), 0);
QCOMPARE(m.indexIn("helloHello"_L1, 1), 5);
QCOMPARE(m.indexIn("helloHello"_L1, 6), -1);
}
{
QLatin1StringMatcher m("Hello"_L1, Qt::CaseInsensitive);
QCOMPARE(m.pattern(), "Hello"_L1);
QCOMPARE(m.indexIn("hello"_L1), 0);
QCOMPARE(m.indexIn("Hello"_L1), 0);
QCOMPARE(m.indexIn("Hellohello"_L1), 0);
QCOMPARE(m.indexIn("helloHello"_L1), 0);
QCOMPARE(m.indexIn("helloHello"_L1, 1), 5);
QCOMPARE(m.indexIn("helloHello"_L1, 6), -1);
}
{
QLatin1StringMatcher m(hello, Qt::CaseSensitive);
QCOMPARE(m.pattern(), "hello"_L1);
QCOMPARE(m.indexIn(hello), 0);
QCOMPARE(m.indexIn(hello, 1), -1);
QCOMPARE(m.indexIn(hello2, 1), hello.size());
QCOMPARE(m.indexIn(hello2, 6), -1);
}
}
void tst_QLatin1StringMatcher::interface()
{
QLatin1StringView needle = "abc123"_L1;
QByteArray haystackT(500, 'a');
haystackT.insert(6, "123");
haystackT.insert(31, "abc");
haystackT.insert(42, "abc123");
haystackT.insert(84, "abc123");
QLatin1StringView haystack(haystackT);
QLatin1StringMatcher matcher1;
matcher1 = QLatin1StringMatcher(needle, Qt::CaseSensitive);
QLatin1StringMatcher matcher2;
matcher2.setPattern(needle);
QLatin1StringMatcher matcher3 = QLatin1StringMatcher(needle, Qt::CaseSensitive);
QLatin1StringMatcher matcher4;
matcher4 = matcher3;
QCOMPARE(matcher1.indexIn(haystack), 42);
QCOMPARE(matcher2.indexIn(haystack), 42);
QCOMPARE(matcher3.indexIn(haystack), 42);
QCOMPARE(matcher4.indexIn(haystack), 42);
QCOMPARE(matcher1.indexIn(haystack, 43), 84);
QCOMPARE(matcher1.indexIn(haystack, 85), -1);
QLatin1StringMatcher matcher5("123"_L1, Qt::CaseSensitive);
QCOMPARE(matcher5.indexIn(haystack), 6);
matcher5 = QLatin1StringMatcher("abc"_L1, Qt::CaseSensitive);
QCOMPARE(matcher5.indexIn(haystack), 31);
matcher5.setPattern(matcher4.pattern());
QCOMPARE(matcher5.indexIn(haystack), 42);
QLatin1StringMatcher matcher6 = matcher5;
QCOMPARE(matcher6.indexIn(haystack), 42);
QLatin1StringMatcher matcher7 = std::move(matcher5);
QCOMPARE(matcher7.indexIn(haystack), 42);
matcher1.setPattern("123"_L1);
matcher7 = std::move(matcher1);
QCOMPARE(matcher7.indexIn(haystack), 6);
}
#define LONG_STRING__32 "abcdefghijklmnopqrstuvwxyz012345"
#define LONG_STRING__64 LONG_STRING__32 LONG_STRING__32
#define LONG_STRING_128 LONG_STRING__64 LONG_STRING__64
#define LONG_STRING_256 LONG_STRING_128 LONG_STRING_128
#define LONG_STRING_512 LONG_STRING_256 LONG_STRING_256
void tst_QLatin1StringMatcher::indexIn()
{
const char p_data[] = { 0x0, 0x0, 0x1 };
QLatin1StringView pattern(p_data, sizeof(p_data));
QByteArray haystackT(8, '\0');
haystackT[7] = 0x1;
QLatin1StringView haystack(haystackT);
QLatin1StringMatcher matcher;
matcher = QLatin1StringMatcher(pattern, Qt::CaseSensitive);
QCOMPARE(matcher.indexIn(haystack, 0), 5);
QCOMPARE(matcher.indexIn(haystack, 1), 5);
QCOMPARE(matcher.indexIn(haystack, 2), 5);
matcher.setPattern(pattern);
QCOMPARE(matcher.indexIn(haystack, 0), 5);
QCOMPARE(matcher.indexIn(haystack, 1), 5);
QCOMPARE(matcher.indexIn(haystack, 2), 5);
std::array<char, 256> allChars;
for (int i = 0; i < 256; ++i)
allChars[i] = char(i);
matcher = QLatin1StringMatcher(QLatin1StringView(allChars), Qt::CaseSensitive);
haystackT = LONG_STRING__32 "x";
haystackT += matcher.pattern();
haystack = QLatin1StringView(haystackT);
QCOMPARE(matcher.indexIn(haystack, 0), 33);
QCOMPARE(matcher.indexIn(haystack, 1), 33);
QCOMPARE(matcher.indexIn(haystack, 2), 33);
QCOMPARE(matcher.indexIn(haystack, 33), 33);
QCOMPARE(matcher.indexIn(haystack, 34), -1);
matcher = QLatin1StringMatcher(QLatin1StringView(LONG_STRING_256), Qt::CaseSensitive);
haystackT = QByteArray(LONG_STRING__32 "x");
haystackT += matcher.pattern();
haystackT += QByteArrayView("Just junk at the end");
haystack = QLatin1StringView(haystackT);
QCOMPARE(matcher.indexIn(haystack, 0), 33);
QCOMPARE(matcher.indexIn(haystack, 1), 33);
QCOMPARE(matcher.indexIn(haystack, 2), 33);
QCOMPARE(matcher.indexIn(haystack, 33), 33);
QCOMPARE(matcher.indexIn(haystack, 34), -1);
matcher.setCaseSensitivity(Qt::CaseInsensitive);
QCOMPARE(matcher.indexIn(haystack, 0), 33);
QCOMPARE(matcher.indexIn(haystack, 1), 33);
QCOMPARE(matcher.indexIn(haystack, 2), 33);
QCOMPARE(matcher.indexIn(haystack, 33), 33);
QCOMPARE(matcher.indexIn(haystack, 34), -1);
matcher = QLatin1StringMatcher(QLatin1StringView(LONG_STRING_512), Qt::CaseInsensitive);
haystackT = QByteArray(LONG_STRING__32 "x");
haystackT += matcher.pattern();
haystackT += QByteArrayView("Just junk at the end");
haystack = QLatin1StringView(haystackT);
QCOMPARE(matcher.indexIn(haystack, 0), 33);
QCOMPARE(matcher.indexIn(haystack, 1), 33);
QCOMPARE(matcher.indexIn(haystack, 2), 33);
QCOMPARE(matcher.indexIn(haystack, 33), 33);
QCOMPARE(matcher.indexIn(haystack, 34), -1);
matcher.setCaseSensitivity(Qt::CaseSensitive);
QCOMPARE(matcher.indexIn(haystack, 0), 33);
QCOMPARE(matcher.indexIn(haystack, 1), 33);
QCOMPARE(matcher.indexIn(haystack, 2), 33);
QCOMPARE(matcher.indexIn(haystack, 33), 33);
QCOMPARE(matcher.indexIn(haystack, 34), -1);
matcher = QLatin1StringMatcher(QLatin1StringView(""), Qt::CaseSensitive);
haystackT = QByteArray(LONG_STRING__32 "x");
haystack = QLatin1StringView(haystackT);
QCOMPARE(matcher.indexIn(haystack, 0), 0);
QCOMPARE(matcher.indexIn(haystack, 1), 1);
QCOMPARE(matcher.indexIn(haystack, 2), 2);
QCOMPARE(matcher.indexIn(haystack, 33), 33);
matcher = QLatin1StringMatcher(QLatin1StringView(""), Qt::CaseInsensitive);
haystackT = QByteArray(LONG_STRING__32 "x");
haystack = QLatin1StringView(haystackT);
QCOMPARE(matcher.indexIn(haystack, 0), 0);
QCOMPARE(matcher.indexIn(haystack, 1), 1);
QCOMPARE(matcher.indexIn(haystack, 2), 2);
QCOMPARE(matcher.indexIn(haystack, 33), 33);
matcher = QLatin1StringMatcher(QLatin1StringView("m\xF8"), Qt::CaseInsensitive);
haystackT = QByteArray("M\xF8m\xF8");
haystack = QLatin1StringView(haystackT);
QCOMPARE(matcher.indexIn(haystack, 0), 0);
QCOMPARE(matcher.indexIn(haystack, 1), 2);
QCOMPARE(matcher.indexIn(haystack, 2), 2);
QCOMPARE(matcher.indexIn(haystack, 3), -1);
matcher.setCaseSensitivity(Qt::CaseSensitive);
QCOMPARE(matcher.indexIn(haystack, 0), 2);
QCOMPARE(matcher.indexIn(haystack, 1), 2);
QCOMPARE(matcher.indexIn(haystack, 2), 2);
QCOMPARE(matcher.indexIn(haystack, 3), -1);
}
void tst_QLatin1StringMatcher::haystacksWithMoreThan4GiBWork()
{
#if QT_POINTER_SIZE > 4
// use a large needle to trigger long skips in the Boyer-Moore algorithm
// (to speed up the test)
constexpr std::string_view needle = LONG_STRING_256;
//
// GIVEN: a haystack with more than 4 GiB of data
//
// don't use QByteArray because freeSpaceAtEnd() may break reserve()
// semantics and a realloc is the last thing we need here
std::string large;
QElapsedTimer timer;
timer.start();
constexpr size_t GiB = 1024 * 1024 * 1024;
constexpr size_t BaseSize = 4 * GiB + 1;
try {
large.reserve(BaseSize + needle.size());
large.resize(BaseSize, '\0');
large.append(needle);
} catch (const std::bad_alloc &) {
QSKIP("Could not allocate 4GiB plus a couple hundred bytes of RAM.");
}
QCOMPARE(large.size(), BaseSize + needle.size());
qDebug("created dataset in %lld ms", timer.elapsed());
# if QT_CONFIG(cxx11_future)
using MaybeThread = std::thread;
# else
struct MaybeThread
{
std::function<void()> func;
void join() { func(); }
};
# endif
//
// WHEN: trying to match an occurrence past the 4GiB mark
//
qsizetype dynamicResult;
auto t = MaybeThread{ [&] {
QLatin1StringMatcher m(QLatin1StringView(needle), Qt::CaseSensitive);
dynamicResult = m.indexIn(QLatin1StringView(large));
} };
t.join();
//
// THEN: the result index is not trucated
//
QCOMPARE(dynamicResult, qsizetype(BaseSize));
#else
QSKIP("This test is 64-bit only.");
#endif
}
#undef LONG_STRING_512
#undef LONG_STRING_256
#undef LONG_STRING_128
#undef LONG_STRING__64
#undef LONG_STRING__32
QTEST_APPLESS_MAIN(tst_QLatin1StringMatcher)
#include "tst_qlatin1stringmatcher.moc"
|
