qt 6.5.1 original

tests/auto/corelib/tools/qringbuffer/CMakeLists.txt

@@ -0,0 +1,13 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_qringbuffer Test:
+#####################################################################
+
+qt_internal_add_test(tst_qringbuffer
+    SOURCES
+        tst_qringbuffer.cpp
+    LIBRARIES
+        Qt::CorePrivate
+)

tests/auto/corelib/tools/qringbuffer/tst_qringbuffer.cpp

@@ -0,0 +1,408 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QTest>
+#include <QBuffer>
+#include <QVarLengthArray>
+
+#include <private/qringbuffer_p.h>
+#include <qlist.h>
+
+class tst_QRingBuffer : public QObject
+{
+    Q_OBJECT
+private slots:
+    void constructing();
+    void usingInVector();
+    void usingInVarLengthArray();
+    void readPointerAtPositionWriteRead();
+    void readPointerAtPositionEmptyRead();
+    void readPointerAtPositionWithHead();
+    void readPointerAtPositionReadTooMuch();
+    void sizeWhenReservedAndChopped();
+    void sizeWhenReserved();
+    void free();
+    void reserveAndRead();
+    void reserveAndReadInPacketMode();
+    void reserveFrontAndRead();
+    void chop();
+    void readPointerValidity();
+    void ungetChar();
+    void indexOf();
+    void appendAndRead();
+    void peek();
+    void readLine();
+};
+
+void tst_QRingBuffer::constructing()
+{
+    QRingBuffer ringBuffer;
+
+    const int chunkSize = ringBuffer.chunkSize();
+    ringBuffer.setChunkSize(0);
+    QCOMPARE(ringBuffer.chunkSize(), Q_INT64_C(0));
+    ringBuffer.setChunkSize(chunkSize);
+    QCOMPARE(ringBuffer.chunkSize(), chunkSize);
+
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(0));
+    QVERIFY(ringBuffer.isEmpty());
+    QCOMPARE(ringBuffer.nextDataBlockSize(), Q_INT64_C(0));
+    QVERIFY(ringBuffer.readPointer() == nullptr);
+    QCOMPARE(ringBuffer.skip(5), Q_INT64_C(0));
+    QCOMPARE(ringBuffer.read(), QByteArray());
+    QCOMPARE(ringBuffer.getChar(), -1);
+    QVERIFY(!ringBuffer.canReadLine());
+
+    char buf[5];
+    QCOMPARE(ringBuffer.peek(buf, sizeof(buf)), Q_INT64_C(0));
+}
+
+void tst_QRingBuffer::usingInVector()
+{
+    QRingBuffer ringBuffer;
+    std::vector<QRingBuffer> buffers;
+
+    ringBuffer.reserve(5);
+    buffers.push_back(std::move(ringBuffer));
+    QCOMPARE(buffers[0].size(), Q_INT64_C(5));
+}
+
+void tst_QRingBuffer::usingInVarLengthArray()
+{
+    QRingBuffer ringBuffer;
+    QVarLengthArray<QRingBuffer, 42> buffers;
+
+    ringBuffer.reserve(5);
+    buffers.push_back(std::move(ringBuffer));
+    QCOMPARE(buffers[0].size(), Q_INT64_C(5));
+}
+
+void tst_QRingBuffer::sizeWhenReserved()
+{
+    QRingBuffer ringBuffer;
+    ringBuffer.reserve(5);
+
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(5));
+}
+
+void tst_QRingBuffer::sizeWhenReservedAndChopped()
+{
+    QRingBuffer ringBuffer;
+    ringBuffer.reserve(31337);
+    ringBuffer.chop(31337);
+
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(0));
+}
+
+void tst_QRingBuffer::readPointerAtPositionReadTooMuch()
+{
+    QRingBuffer ringBuffer;
+
+    qint64 length;
+    const char *buf = ringBuffer.readPointerAtPosition(42, length);
+    QVERIFY(buf == 0);
+    QCOMPARE(length, Q_INT64_C(0));
+}
+
+void tst_QRingBuffer::readPointerAtPositionWithHead()
+{
+    QRingBuffer ringBuffer;
+    char *buf = ringBuffer.reserve(4);
+    memcpy (buf, "0123", 4);
+    ringBuffer.free(2);
+
+    // ringBuffer should have stayed the same except
+    // its head it had moved to position 2
+    qint64 length;
+    const char* buf2 = ringBuffer.readPointerAtPosition(0, length);
+
+    QCOMPARE(length, Q_INT64_C(2));
+    QCOMPARE(*buf2, '2');
+    QCOMPARE(*(buf2 + 1), '3');
+
+    // advance 2 more, ringBuffer should be empty then
+    ringBuffer.free(2);
+    buf2 = ringBuffer.readPointerAtPosition(0, length);
+    QCOMPARE(length, Q_INT64_C(0));
+    QVERIFY(buf2 == 0);
+
+    // check buffer with 2 blocks
+    memcpy(ringBuffer.reserve(4), "0123", 4);
+    ringBuffer.append(QByteArray("45678", 5));
+    ringBuffer.free(3);
+    buf2 = ringBuffer.readPointerAtPosition(Q_INT64_C(1), length);
+    QCOMPARE(length, Q_INT64_C(5));
+}
+
+void tst_QRingBuffer::readPointerAtPositionEmptyRead()
+{
+    QRingBuffer ringBuffer;
+
+    qint64 length;
+    const char *buf = ringBuffer.readPointerAtPosition(0, length);
+    QVERIFY(buf == 0);
+    QCOMPARE(length, Q_INT64_C(0));
+}
+
+void tst_QRingBuffer::readPointerAtPositionWriteRead()
+{
+    //create some data
+    QBuffer inData;
+    inData.open(QIODevice::ReadWrite);
+    inData.putChar(0x42);
+    inData.putChar(0x23);
+    inData.write("Qt rocks!");
+    for (int i = 0; i < 5000; i++)
+        inData.write("Number " + QByteArray::number(i));
+    inData.reset();
+    QVERIFY(inData.size() > 0);
+
+    //put the inData in the QRingBuffer
+    QRingBuffer ringBuffer;
+    qint64 remaining = inData.size();
+    while (remaining > 0) {
+        // write in chunks of 50 bytes
+        // this ensures there will be multiple QByteArrays inside the QRingBuffer
+        // since QRingBuffer is then only using individual arrays of around 4000 bytes
+        qint64 thisWrite = qMin(remaining, Q_INT64_C(50));
+        char *pos = ringBuffer.reserve(thisWrite);
+        inData.read(pos, thisWrite);
+        remaining -= thisWrite;
+    }
+    // was data put into it?
+    QVERIFY(ringBuffer.size() > 0);
+    QCOMPARE(ringBuffer.size(), inData.size());
+
+    //read from the QRingBuffer in loop, put back into another QBuffer
+    QBuffer outData;
+    outData.open(QIODevice::ReadWrite);
+    remaining = ringBuffer.size();
+    while (remaining > 0) {
+        qint64 thisRead;
+        // always try to read as much as possible
+        const char *buf = ringBuffer.readPointerAtPosition(ringBuffer.size() - remaining, thisRead);
+        outData.write(buf, thisRead);
+        remaining -= thisRead;
+    }
+    outData.reset();
+
+    QVERIFY(outData.size() > 0);
+
+    // was the data read from the QRingBuffer the same as the one written into it?
+    QCOMPARE(outData.size(), inData.size());
+    QVERIFY(outData.buffer().startsWith(inData.buffer()));
+}
+
+void tst_QRingBuffer::free()
+{
+    QRingBuffer ringBuffer;
+    // make three byte arrays with different sizes
+    ringBuffer.reserve(4096);
+    ringBuffer.reserve(2048);
+    ringBuffer.append(QByteArray("01234", 5));
+
+    ringBuffer.free(1);
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(4095) + 2048 + 5);
+    ringBuffer.free(4096);
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(2047) + 5);
+    ringBuffer.free(48);
+    ringBuffer.free(2000);
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(4));
+    QVERIFY(memcmp(ringBuffer.readPointer(), "1234", 4) == 0);
+}
+
+void tst_QRingBuffer::reserveAndRead()
+{
+    QRingBuffer ringBuffer;
+    // fill buffer with an arithmetic progression
+    for (int i = 1; i < 256; ++i) {
+        QByteArray ba(i, char(i));
+        char *ringPos = ringBuffer.reserve(i);
+        QVERIFY(ringPos);
+        memcpy(ringPos, ba.constData(), i);
+    }
+
+    // readback and check stored data
+    for (int i = 1; i < 256; ++i) {
+        QByteArray ba;
+        ba.resize(i);
+        qint64 thisRead = ringBuffer.read(ba.data(), i);
+        QCOMPARE(thisRead, qint64(i));
+        QCOMPARE(ba.count(char(i)), i);
+    }
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(0));
+}
+
+void tst_QRingBuffer::reserveAndReadInPacketMode()
+{
+    QRingBuffer ringBuffer(0);
+    // try to allocate 255 buffers
+    for (int i = 1; i < 256; ++i) {
+        char *ringPos = ringBuffer.reserve(i);
+        QVERIFY(ringPos);
+    }
+
+    // count and check the size of stored buffers
+    int buffersCount = 0;
+    while (!ringBuffer.isEmpty()) {
+        QByteArray ba = ringBuffer.read();
+        ++buffersCount;
+        QCOMPARE(ba.size(), buffersCount);
+    }
+    QCOMPARE(buffersCount, 255);
+}
+
+void tst_QRingBuffer::reserveFrontAndRead()
+{
+    QRingBuffer ringBuffer;
+    // fill buffer with an arithmetic progression
+    for (int i = 1; i < 256; ++i) {
+        QByteArray ba(i, char(i));
+        char *ringPos = ringBuffer.reserveFront(i);
+        QVERIFY(ringPos);
+        memcpy(ringPos, ba.constData(), i);
+    }
+
+    // readback and check stored data
+    for (int i = 255; i > 0; --i) {
+        QByteArray ba;
+        ba.resize(i);
+        qint64 thisRead = ringBuffer.read(ba.data(), i);
+        QCOMPARE(thisRead, qint64(i));
+        QCOMPARE(ba.count(char(i)), i);
+    }
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(0));
+}
+
+void tst_QRingBuffer::chop()
+{
+    QRingBuffer ringBuffer;
+    // make three byte arrays with different sizes
+    ringBuffer.append(QByteArray("01234", 5));
+    ringBuffer.reserve(2048);
+    ringBuffer.reserve(4096);
+
+    ringBuffer.chop(1);
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(5) + 2048 + 4095);
+    ringBuffer.chop(4096);
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(5) + 2047);
+    ringBuffer.chop(48);
+    ringBuffer.chop(2000);
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(4));
+    QVERIFY(memcmp(ringBuffer.readPointer(), "0123", 4) == 0);
+}
+
+void tst_QRingBuffer::readPointerValidity()
+{
+    QRingBuffer ringBuffer(16);
+    QByteArray ba("Hello world!");
+
+    ringBuffer.append(ba);
+    const char *ptr = ringBuffer.readPointer();
+    ba.clear();
+    ringBuffer.reserve(32);
+    QVERIFY(ptr == ringBuffer.readPointer());
+    ringBuffer.reserveFront(32);
+    qint64 dummy;
+    QVERIFY(ptr == ringBuffer.readPointerAtPosition(32, dummy));
+}
+
+void tst_QRingBuffer::ungetChar()
+{
+    QRingBuffer ringBuffer(16);
+    for (int i = 1; i < 32; ++i)
+        ringBuffer.putChar(char(i));
+
+    for (int i = 1; i < 31; ++i) {
+        int c = ringBuffer.getChar();
+        QCOMPARE(c, 1);
+        ringBuffer.getChar();
+        ringBuffer.ungetChar(char(c)); // unget first char
+    }
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(1));
+}
+
+void tst_QRingBuffer::indexOf()
+{
+    QRingBuffer ringBuffer(16);
+    for (int i = 1; i < 256; ++i)
+        ringBuffer.putChar(char(i));
+
+    for (int i = 1; i < 256; ++i) {
+        qint64 index = ringBuffer.indexOf(char(i));
+        QCOMPARE(index, qint64(i - 1));
+        QCOMPARE(ringBuffer.indexOf(char(i), i, i >> 1), index);
+        QCOMPARE(ringBuffer.indexOf(char(i), 256, i), Q_INT64_C(-1));
+        QCOMPARE(ringBuffer.indexOf(char(i), i - 1), -1); // test for absent char
+    }
+}
+
+void tst_QRingBuffer::appendAndRead()
+{
+    QRingBuffer ringBuffer;
+    QByteArray ba1("Hello world!");
+    QByteArray ba2("Test string.");
+    QByteArray ba3("0123456789");
+    ringBuffer.append(ba1);
+    ringBuffer.append(ba2);
+    ringBuffer.append(ba3);
+
+    QCOMPARE(ringBuffer.read(), ba1);
+    QCOMPARE(ringBuffer.read(), ba2);
+    QCOMPARE(ringBuffer.read(), ba3);
+}
+
+void tst_QRingBuffer::peek()
+{
+    QRingBuffer ringBuffer;
+    QByteArray testBuffer;
+    // fill buffer with an arithmetic progression
+    for (int i = 1; i < 256; ++i) {
+        char *ringPos = ringBuffer.reserve(i);
+        QVERIFY(ringPos);
+        memset(ringPos, i, i);
+        testBuffer.append(ringPos, i);
+    }
+
+    // check stored data
+    QByteArray resultBuffer;
+    int peekPosition = testBuffer.size();
+    for (int i = 1; i < 256; ++i) {
+        QByteArray ba(i, 0);
+        peekPosition -= i;
+        qint64 thisPeek = ringBuffer.peek(ba.data(), i, peekPosition);
+        QCOMPARE(thisPeek, qint64(i));
+        resultBuffer.prepend(ba);
+    }
+    QCOMPARE(resultBuffer, testBuffer);
+}
+
+void tst_QRingBuffer::readLine()
+{
+    QRingBuffer ringBuffer;
+    QByteArray ba1("Hello world!\n", 13);
+    QByteArray ba2("\n", 1);
+    QByteArray ba3("Test string.", 12);
+    QByteArray ba4("0123456789", 10);
+    ringBuffer.append(ba1);
+    ringBuffer.append(ba2);
+    ringBuffer.append(ba3 + ba4 + ba2);
+
+    char stringBuf[102];
+    stringBuf[101] = 0; // non-crash terminator
+    QCOMPARE(ringBuffer.readLine(stringBuf, sizeof(stringBuf) - 2), qint64(ba1.size()));
+    QCOMPARE(QByteArray(stringBuf, int(strlen(stringBuf))), ba1);
+
+    // check first empty string reading
+    stringBuf[0] = char(0xFF);
+    QCOMPARE(ringBuffer.readLine(stringBuf, int(sizeof(stringBuf)) - 2), qint64(ba2.size()));
+    QCOMPARE(stringBuf[0], ba2.at(0));
+
+    QCOMPARE(ringBuffer.readLine(stringBuf, int(sizeof(stringBuf)) - 2),
+             qint64(ba3.size() + ba4.size() + ba2.size()));
+    QCOMPARE(QByteArray(stringBuf, int(strlen(stringBuf))), ba3 + ba4 + ba2);
+    QCOMPARE(ringBuffer.size(), Q_INT64_C(0));
+}
+
+QTEST_APPLESS_MAIN(tst_QRingBuffer)
+#include "tst_qringbuffer.moc"