diff options
Diffstat (limited to 'src/corelib/tools/qbytearray.cpp')
| -rw-r--r-- | src/corelib/tools/qbytearray.cpp | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/src/corelib/tools/qbytearray.cpp b/src/corelib/tools/qbytearray.cpp index 9526350126..ecbb4743af 100644 --- a/src/corelib/tools/qbytearray.cpp +++ b/src/corelib/tools/qbytearray.cpp @@ -943,6 +943,23 @@ QByteArray qUncompress(const uchar* data, int nbytes) and QByteArray() compares equal to QByteArray(""). We recommend that you always use isEmpty() and avoid isNull(). + \section1 Maximum size and out-of-memory conditions + + The current version of QByteArray is limited to just under 2 GB (2^31 + bytes) in size. The exact value is architecture-dependent, since it depends + on the overhead required for managing the data block, but is no more than + 32 bytes. Raw data blocks are also limited by the use of \c int type in the + current version to 2 GB minus 1 byte. + + In case memory allocation fails, QByteArray will throw a \c std::bad_alloc + exception. Out of memory conditions in the Qt containers are the only case + where Qt will throw exceptions. + + Note that the operating system may impose further limits on applications + holding a lot of allocated memory, especially large, contiguous blocks. + Such considerations, the configuration of such behavior or any mitigation + are outside the scope of the QByteArray API. + \section1 Notes on Locale \section2 Number-String Conversions @@ -2072,7 +2089,7 @@ static inline QByteArray &qbytearray_insert(QByteArray *ba, { Q_ASSERT(pos >= 0); - if (pos < 0 || len <= 0 || arr == 0) + if (pos < 0 || len <= 0 || arr == nullptr) return *ba; int oldsize = ba->size(); @@ -4775,7 +4792,7 @@ static void q_toPercentEncoding(QByteArray *ba, const char *dontEncode, const ch QByteArray input = *ba; int len = input.count(); const char *inputData = input.constData(); - char *output = 0; + char *output = nullptr; int length = 0; for (int i = 0; i < len; ++i) { @@ -4815,7 +4832,7 @@ void q_toPercentEncoding(QByteArray *ba, const char *exclude, const char *includ void q_normalizePercentEncoding(QByteArray *ba, const char *exclude) { q_fromPercentEncoding(ba, '%'); - q_toPercentEncoding(ba, exclude, 0, '%'); + q_toPercentEncoding(ba, exclude, nullptr, '%'); } /*! |