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author | Yann Collet <yann.collet.73@gmail.com> | 2015-03-18 20:38:27 (GMT) |
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committer | Yann Collet <yann.collet.73@gmail.com> | 2015-03-18 20:38:27 (GMT) |
commit | 7ee725645b58c201f11443d70210c2f986371b59 (patch) | |
tree | 4f878e6744918cf0251cde54c5e8afbab6ef6c46 /lib/lz4frame.h | |
parent | 7d87d43e619b0296bbe3f1674f10575b3f68c189 (diff) | |
download | lz4-7ee725645b58c201f11443d70210c2f986371b59.zip lz4-7ee725645b58c201f11443d70210c2f986371b59.tar.gz lz4-7ee725645b58c201f11443d70210c2f986371b59.tar.bz2 |
frame content size support
Diffstat (limited to 'lib/lz4frame.h')
-rw-r--r-- | lib/lz4frame.h | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/lib/lz4frame.h b/lib/lz4frame.h index 71814b0..54db165 100644 --- a/lib/lz4frame.h +++ b/lib/lz4frame.h @@ -68,18 +68,19 @@ typedef enum { noContentChecksum=0, contentChecksumEnabled } contentChecksum_t; typedef enum { LZ4F_frame=0, skippableFrame } frameType_t; typedef struct { - blockSizeID_t blockSizeID; /* max64KB, max256KB, max1MB, max4MB ; 0 == default */ - blockMode_t blockMode; /* blockLinked, blockIndependent ; 0 == default */ - contentChecksum_t contentChecksumFlag; /* noContentChecksum, contentChecksumEnabled ; 0 == default */ - frameType_t frameType; /* LZ4F_frame, skippableFrame : 0 == default */ - unsigned reserved[4]; + blockSizeID_t blockSizeID; /* max64KB, max256KB, max1MB, max4MB ; 0 == default */ + blockMode_t blockMode; /* blockLinked, blockIndependent ; 0 == default */ + contentChecksum_t contentChecksumFlag; /* noContentChecksum, contentChecksumEnabled ; 0 == default */ + frameType_t frameType; /* LZ4F_frame, skippableFrame ; 0 == default */ + unsigned long long frameOSize; /* Size of uncompressed (original) content ; 0 == unknown */ + unsigned reserved[2]; /* must be zero for forward compatibility */ } LZ4F_frameInfo_t; typedef struct { LZ4F_frameInfo_t frameInfo; unsigned compressionLevel; /* 0 == default (fast mode); values above 16 count as 16 */ - unsigned autoFlush; /* 1 == always flush : reduce need for tmp buffer */ - unsigned reserved[4]; + unsigned autoFlush; /* 1 == always flush (reduce need for tmp buffer) */ + unsigned reserved[4]; /* must be zero for forward compatibility */ } LZ4F_preferences_t; @@ -131,7 +132,7 @@ LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_compressionContext_t LZ4F_comp size_t LZ4F_compressBegin(LZ4F_compressionContext_t compressionContext, void* dstBuffer, size_t dstMaxSize, const LZ4F_preferences_t* preferencesPtr); /* LZ4F_compressBegin() : * will write the frame header into dstBuffer. - * dstBuffer must be large enough to accommodate a header (dstMaxSize). Maximum header size is 19 bytes. + * dstBuffer must be large enough to accommodate a header (dstMaxSize). Maximum header size is 15 bytes. * The LZ4F_preferences_t structure is optional : you can provide NULL as argument, all preferences will then be set to default. * The result of the function is the number of bytes written into dstBuffer for the header * or an error code (can be tested using LZ4F_isError()) |