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Diffstat (limited to 'src/corelib/tools/qbytearray.cpp')
| -rw-r--r-- | src/corelib/tools/qbytearray.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/corelib/tools/qbytearray.cpp b/src/corelib/tools/qbytearray.cpp index c25d39461f..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 |