diff options
| -rw-r--r-- | src/corelib/io/qiodevice.cpp | 3 | ||||
| -rw-r--r-- | tests/auto/qbuffer/tst_qbuffer.cpp | 26 |
2 files changed, 29 insertions, 0 deletions
diff --git a/src/corelib/io/qiodevice.cpp b/src/corelib/io/qiodevice.cpp index bb11d6bb7c..223df9b0f6 100644 --- a/src/corelib/io/qiodevice.cpp +++ b/src/corelib/io/qiodevice.cpp @@ -810,6 +810,9 @@ qint64 QIODevice::read(char *data, qint64 maxSize) } } + if (!maxSize) + return readSoFar; + if ((d->openMode & Unbuffered) == 0 && maxSize < QIODEVICE_BUFFERSIZE) { // In buffered mode, we try to fill up the QIODevice buffer before // we do anything else. diff --git a/tests/auto/qbuffer/tst_qbuffer.cpp b/tests/auto/qbuffer/tst_qbuffer.cpp index fcef6a3978..dd5ca91dad 100644 --- a/tests/auto/qbuffer/tst_qbuffer.cpp +++ b/tests/auto/qbuffer/tst_qbuffer.cpp @@ -76,6 +76,7 @@ private slots: void atEnd(); void readLineBoundaries(); void writeAfterQByteArrayResize(); + void read_null(); protected slots: void readyReadSlot(); @@ -529,5 +530,30 @@ void tst_QBuffer::writeAfterQByteArrayResize() QCOMPARE(buffer.buffer().size(), 1000); } +void tst_QBuffer::read_null() +{ + QByteArray buffer; + buffer.resize(32000); + for (int i = 0; i < buffer.size(); ++i) + buffer[i] = char(i & 0xff); + + QBuffer in(&buffer); + in.open(QIODevice::ReadOnly); + + QByteArray chunk; + + chunk.resize(16380); + in.read(chunk.data(), 16380); + + QCOMPARE(chunk, buffer.mid(0, chunk.size())); + + in.read(chunk.data(), 0); + + chunk.resize(8); + in.read(chunk.data(), chunk.size()); + + QCOMPARE(chunk, buffer.mid(16380, chunk.size())); +} + QTEST_MAIN(tst_QBuffer) #include "tst_qbuffer.moc" |