void tst_qringbuffer::free()
{
QRingBuffer ringBuffer;
QBENCHMARK {
ringBuffer.reserve(4096);
ringBuffer.reserve(2048);
ringBuffer.append(QByteArray("01234", 5));
ringBuffer.free(1);
ringBuffer.free(4096);
ringBuffer.free(48);
ringBuffer.free(2000);
}
}
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, qint64(2));
QVERIFY(*buf2 == '2');
QVERIFY(*(buf2+1) == '3');
// advance 2 more, ringBuffer should be empty then
ringBuffer.free(2);
buf2 = ringBuffer.readPointerAtPosition(0, length);
QCOMPARE(length, qint64(0));
QVERIFY(buf2 == 0);
}
/*! \reimp
*/
qint64 QProcess::readData(char *data, qint64 maxlen)
{
Q_D(QProcess);
QRingBuffer *readBuffer = (d->processChannel == QProcess::StandardError)
? &d->errorReadBuffer
: &d->outputReadBuffer;
if (maxlen == 1) {
int c = readBuffer->getChar();
if (c == -1) {
#if defined QPROCESS_DEBUG
qDebug("QProcess::readData(%p \"%s\", %d) == -1",
data, qt_prettyDebug(data, maxlen, 1).constData(), 1);
#endif
return -1;
}
*data = (char) c;
#if defined QPROCESS_DEBUG
qDebug("QProcess::readData(%p \"%s\", %d) == 1",
data, qt_prettyDebug(data, maxlen, 1).constData(), 1);
#endif
return 1;
}
qint64 bytesToRead = qint64(qMin(readBuffer->size(), (int)maxlen));
qint64 readSoFar = 0;
while (readSoFar < bytesToRead) {
char *ptr = readBuffer->readPointer();
int bytesToReadFromThisBlock = qMin<qint64>(bytesToRead - readSoFar,
readBuffer->nextDataBlockSize());
memcpy(data + readSoFar, ptr, bytesToReadFromThisBlock);
readSoFar += bytesToReadFromThisBlock;
readBuffer->free(bytesToReadFromThisBlock);
}
#if defined QPROCESS_DEBUG
qDebug("QProcess::readData(%p \"%s\", %lld) == %lld",
data, qt_prettyDebug(data, readSoFar, 16).constData(), maxlen, readSoFar);
#endif
return readSoFar;
}