diff options
-rw-r--r-- | lib/lz4frame.c | 3 | ||||
-rw-r--r-- | lib/lz4frame.h | 2 | ||||
-rw-r--r-- | tests/frametest.c | 18 |
3 files changed, 22 insertions, 1 deletions
diff --git a/lib/lz4frame.c b/lib/lz4frame.c index c9f630d..5d716ea 100644 --- a/lib/lz4frame.c +++ b/lib/lz4frame.c @@ -725,6 +725,9 @@ size_t LZ4F_compressBegin(LZ4F_cctx* cctxPtr, */ size_t LZ4F_compressBound(size_t srcSize, const LZ4F_preferences_t* preferencesPtr) { + if (preferencesPtr && preferencesPtr->autoFlush) { + return LZ4F_compressBound_internal(srcSize, preferencesPtr, 0); + } return LZ4F_compressBound_internal(srcSize, preferencesPtr, (size_t)-1); } diff --git a/lib/lz4frame.h b/lib/lz4frame.h index 391e484..87b0b2a 100644 --- a/lib/lz4frame.h +++ b/lib/lz4frame.h @@ -284,7 +284,7 @@ LZ4FLIB_API size_t LZ4F_compressBegin(LZ4F_cctx* cctx, * @return is always the same for a srcSize and prefsPtr. * prefsPtr is optional : when NULL is provided, preferences will be set to cover worst case scenario. * tech details : - * @return includes the possibility that internal buffer might already be filled by up to (blockSize-1) bytes. + * @return if automatic flushing is not enabled, includes the possibility that internal buffer might already be filled by up to (blockSize-1) bytes. * It also includes frame footer (ending + checksum), since it might be generated by LZ4F_compressEnd(). * @return doesn't include frame header, as it was already generated by LZ4F_compressBegin(). */ diff --git a/tests/frametest.c b/tests/frametest.c index 1b932e4..f891530 100644 --- a/tests/frametest.c +++ b/tests/frametest.c @@ -200,6 +200,24 @@ int basicTests(U32 seed, double compressibility) DISPLAYLEVEL(3, " %u \n", (U32)cBound); } + /* LZ4F_compressBound() : special case : automatic flushing enabled */ + DISPLAYLEVEL(3, "LZ4F_compressBound(1 KB, autoFlush=1) = "); + { size_t cBound; + LZ4F_preferences_t autoFlushPrefs; + memset(&autoFlushPrefs, 0, sizeof(autoFlushPrefs)); + autoFlushPrefs.autoFlush = 1; + cBound = LZ4F_compressBound(1 KB, &autoFlushPrefs); + if (cBound > 64 KB) goto _output_error; + DISPLAYLEVEL(3, " %u \n", (U32)cBound); + } + + /* LZ4F_compressBound() : special case : automatic flushing disabled */ + DISPLAYLEVEL(3, "LZ4F_compressBound(1 KB, autoFlush=0) = "); + { size_t const cBound = LZ4F_compressBound(1 KB, &prefs); + if (cBound < 64 KB) goto _output_error; + DISPLAYLEVEL(3, " %u \n", (U32)cBound); + } + /* Special case : null-content frame */ testSize = 0; DISPLAYLEVEL(3, "LZ4F_compressFrame, compress null content : "); |