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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QTest>
#include <qbytearraymatcher.h>
#include <numeric>
#include <string>
#include <thread>
// COM interface
#if defined(Q_OS_WIN) && defined(interface)
# undef interface
#endif
class tst_QByteArrayMatcher : public QObject
{
Q_OBJECT
private slots:
void overloads();
void interface();
void indexIn();
void staticByteArrayMatcher();
void haystacksWithMoreThan4GiBWork();
};
void tst_QByteArrayMatcher::overloads()
{
QByteArray hello = QByteArrayLiteral("hello");
QByteArray hello2 = hello.repeated(2);
{
QByteArrayMatcher m("hello");
QCOMPARE(m.pattern(), "hello");
QCOMPARE(m.indexIn("hello"), 0);
}
{
QByteArrayMatcher m("hello", qsizetype(3));
QCOMPARE(m.pattern(), "hel");
QCOMPARE(m.indexIn("hellohello", qsizetype(2)), -1); // haystack is "he", not: from is 2
QCOMPARE(m.indexIn("hellohello", qsizetype(3)), 0); // haystack is "hel", not: from is 3
}
{
QByteArrayMatcher m(hello);
QCOMPARE(m.pattern(), "hello");
QCOMPARE(m.indexIn(hello), 0);
QCOMPARE(m.indexIn(hello2, qsizetype(1)), hello.size());
}
{
QStaticByteArrayMatcher m("hel");
QCOMPARE(m.pattern(), "hel");
QCOMPARE(m.indexIn("hello"), qsizetype(0));
QCOMPARE(m.indexIn("hellohello", qsizetype(2)), -1); // haystack is "he", not: from is 2
QCOMPARE(m.indexIn("hellohello", qsizetype(3)), 0); // haystack is "hel", not: from is 3
QCOMPARE(m.indexIn(hello), 0);
QCOMPARE(m.indexIn(hello2, qsizetype(2)), hello.size()); // from is 2
QCOMPARE(m.indexIn(hello2, qsizetype(3)), hello.size()); // from is 3
}
}
void tst_QByteArrayMatcher::interface()
{
const char needle[] = "abc123";
QByteArray haystack(500, 'a');
haystack.insert(6, "123");
haystack.insert(31, "abc");
haystack.insert(42, "abc123");
haystack.insert(84, "abc123");
QByteArrayMatcher matcher1;
matcher1 = QByteArrayMatcher(QByteArray(needle));
QByteArrayMatcher matcher2;
matcher2.setPattern(QByteArray(needle));
QByteArrayMatcher matcher3 = QByteArrayMatcher(QByteArray(needle));
QByteArrayMatcher matcher4(needle, sizeof(needle) - 1);
QByteArrayMatcher matcher5(matcher2);
QByteArrayMatcher matcher6;
matcher6 = matcher3;
QCOMPARE(matcher1.indexIn(haystack), 42);
QCOMPARE(matcher2.indexIn(haystack), 42);
QCOMPARE(matcher3.indexIn(haystack), 42);
QCOMPARE(matcher4.indexIn(haystack), 42);
QCOMPARE(matcher5.indexIn(haystack), 42);
QCOMPARE(matcher6.indexIn(haystack), 42);
QCOMPARE(matcher1.indexIn(haystack.constData(), haystack.size()), 42);
QCOMPARE(matcher1.indexIn(haystack, 43), 84);
QCOMPARE(matcher1.indexIn(haystack.constData(), haystack.size(), 43), 84);
QCOMPARE(matcher1.indexIn(haystack, 85), -1);
QCOMPARE(matcher1.indexIn(haystack.constData(), haystack.size(), 85), -1);
QByteArrayMatcher matcher7(QByteArray("123"));
QCOMPARE(matcher7.indexIn(haystack), 6);
matcher7 = QByteArrayMatcher(QByteArray("abc"));
QCOMPARE(matcher7.indexIn(haystack), 31);
matcher7.setPattern(matcher4.pattern());
QCOMPARE(matcher7.indexIn(haystack), 42);
}
#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
void tst_QByteArrayMatcher::indexIn()
{
const char p_data[] = { 0x0, 0x0, 0x1 };
QByteArray pattern(p_data, sizeof(p_data));
QByteArray haystack(8, '\0');
haystack[7] = 0x1;
QByteArrayMatcher matcher;
matcher = QByteArrayMatcher(pattern);
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);
QByteArray allChars(256, Qt::Uninitialized);
for (int i = 0; i < 256; ++i)
allChars[i] = char(i);
matcher = QByteArrayMatcher(allChars);
haystack = LONG_STRING__32 "x" + matcher.pattern();
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 = QByteArrayMatcher(LONG_STRING_256);
haystack = LONG_STRING__32 "x" + matcher.pattern();
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);
}
void tst_QByteArrayMatcher::staticByteArrayMatcher()
{
{
static constexpr auto smatcher = qMakeStaticByteArrayMatcher("Hello");
QCOMPARE(smatcher.pattern(), QByteArrayLiteral("Hello"));
QCOMPARE(smatcher.indexIn(QByteArray("Hello, World!")), 0);
QCOMPARE(smatcher.indexIn(QByteArray("Hello, World!"), 0), 0);
QCOMPARE(smatcher.indexIn(QByteArray("Hello, World!"), 1), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aHello, World!")), 1);
QCOMPARE(smatcher.indexIn(QByteArray("aaHello, World!")), 2);
QCOMPARE(smatcher.indexIn(QByteArray("aaaHello, World!")), 3);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaHello, World!")), 4);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaHello, World!")), 5);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaaHello, World!")), 6);
QCOMPARE(smatcher.indexIn(QByteArray("HHello, World!")), 1);
QCOMPARE(smatcher.indexIn(QByteArray("HeHello, World!")), 2);
QCOMPARE(smatcher.indexIn(QByteArray("HelHello, World!")), 3);
QCOMPARE(smatcher.indexIn(QByteArray("HellHello, World!")), 4);
QCOMPARE(smatcher.indexIn(QByteArray("HellaHello, World!")), 5);
QCOMPARE(smatcher.indexIn(QByteArray("HellauHello, World!")), 6);
QCOMPARE(smatcher.indexIn(QByteArray("aHella, World!")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaHella, World!")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaaHella, World!")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaHella, World!")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaHella, World!")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaaHella, World!")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aHello")), 1);
QCOMPARE(smatcher.indexIn(QByteArray("aaHello")), 2);
QCOMPARE(smatcher.indexIn(QByteArray("aaaHello")), 3);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaHello")), 4);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaHello")), 5);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaaHello")), 6);
QCOMPARE(smatcher.indexIn(QByteArray("HHello")), 1);
QCOMPARE(smatcher.indexIn(QByteArray("HeHello")), 2);
QCOMPARE(smatcher.indexIn(QByteArray("HelHello")), 3);
QCOMPARE(smatcher.indexIn(QByteArray("HellHello")), 4);
QCOMPARE(smatcher.indexIn(QByteArray("HellaHello")), 5);
QCOMPARE(smatcher.indexIn(QByteArray("HellauHello")), 6);
QCOMPARE(smatcher.indexIn(QByteArray("aHella")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaHella")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaaHella")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaHella")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaHella")), -1);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaaHella")), -1);
}
{
static constexpr auto smatcher = qMakeStaticByteArrayMatcher(LONG_STRING_256);
QCOMPARE(smatcher.pattern(), QByteArrayLiteral(LONG_STRING_256));
QCOMPARE(smatcher.indexIn(QByteArray("a" LONG_STRING_256)), 1);
QCOMPARE(smatcher.indexIn(QByteArray("aa" LONG_STRING_256)), 2);
QCOMPARE(smatcher.indexIn(QByteArray("aaa" LONG_STRING_256)), 3);
QCOMPARE(smatcher.indexIn(QByteArray("aaaa" LONG_STRING_256)), 4);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaa" LONG_STRING_256)), 5);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaa" LONG_STRING_256)), 6);
QCOMPARE(smatcher.indexIn(QByteArray("a" LONG_STRING_256 "a")), 1);
QCOMPARE(smatcher.indexIn(QByteArray("aa" LONG_STRING_256 "a")), 2);
QCOMPARE(smatcher.indexIn(QByteArray("aaa" LONG_STRING_256 "a")), 3);
QCOMPARE(smatcher.indexIn(QByteArray("aaaa" LONG_STRING_256 "a")), 4);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaa" LONG_STRING_256 "a")), 5);
QCOMPARE(smatcher.indexIn(QByteArray("aaaaaa" LONG_STRING_256 "a")), 6);
QCOMPARE(smatcher.indexIn(QByteArray(LONG_STRING__32 "x" LONG_STRING_256)), 33);
QCOMPARE(smatcher.indexIn(QByteArray(LONG_STRING__64 "x" LONG_STRING_256)), 65);
QCOMPARE(smatcher.indexIn(QByteArray(LONG_STRING_128 "x" LONG_STRING_256)), 129);
}
}
void tst_QByteArrayMatcher::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());
using MaybeThread = std::thread;
//
// WHEN: trying to match an occurrence past the 4GiB mark
//
qsizetype dynamicResult, staticResult;
auto t = MaybeThread{[&]{
QByteArrayMatcher m(needle);
dynamicResult = m.indexIn(large);
}};
{
static_assert(needle == LONG_STRING_256); // need a string literal in the following line:
QStaticByteArrayMatcher m(LONG_STRING_256);
staticResult = m.indexIn(large.data(), large.size());
}
t.join();
//
// THEN: the result index is not trucated
//
QCOMPARE(staticResult, qsizetype(BaseSize));
QCOMPARE(dynamicResult, qsizetype(BaseSize));
#else
QSKIP("This test is 64-bit only.");
#endif
}
#undef LONG_STRING_256
#undef LONG_STRING_128
#undef LONG_STRING__64
#undef LONG_STRING__32
QTEST_APPLESS_MAIN(tst_QByteArrayMatcher)
#include "tst_qbytearraymatcher.moc"
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