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author | Nick Terrell <terrelln@fb.com> | 2018-02-02 00:08:59 (GMT) |
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committer | Nick Terrell <terrelln@fb.com> | 2018-02-02 00:08:59 (GMT) |
commit | e832a3d87aeb5a8b0c250393e46c7df214ff840b (patch) | |
tree | bdace88cf400b3b4cfd3911d1a77626bbe90751a /lib/lz4.h | |
parent | 99a81c89f00c628ae099156c5d5c419818d61ab7 (diff) | |
download | lz4-e832a3d87aeb5a8b0c250393e46c7df214ff840b.zip lz4-e832a3d87aeb5a8b0c250393e46c7df214ff840b.tar.gz lz4-e832a3d87aeb5a8b0c250393e46c7df214ff840b.tar.bz2 |
Clarify the requirements of the LZ4 streaming API
Diffstat (limited to 'lib/lz4.h')
-rw-r--r-- | lib/lz4.h | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -263,7 +263,8 @@ LZ4LIB_API int LZ4_loadDict (LZ4_stream_t* streamPtr, const char* dictionary, in * 'dst' buffer must be already allocated. * If dstCapacity >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster. * - * Important : Up to 64KB of previously compressed data is assumed to remain present and unmodified in memory ! + * Important : The previous 64KB of compressed data is assumed to remain preset and unmodified in memory! + * If less than 64KB has been compressed all the data must be present. * Special 1 : If input buffer is a double-buffer, it can have any size, including < 64 KB. * Special 2 : If input buffer is a ring-buffer, it can have any size, including < 64 KB. * @@ -306,7 +307,8 @@ LZ4LIB_API int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const * These decoding functions allow decompression of consecutive blocks in "streaming" mode. * A block is an unsplittable entity, it must be presented entirely to a decompression function. * Decompression functions only accept one block at a time. - * Previously decoded blocks *must* remain available at the memory position where they were decoded (up to 64 KB). + * The last 64KB of previously decoded data *must* remain available and unmodified at the memory position where they were decoded. + * If less than 64KB of data has been decoded all the data must be present. * * Special : if application sets a ring buffer for decompression, it must respect one of the following conditions : * - Exactly same size as encoding buffer, with same update rule (block boundaries at same positions) |