diff options
Diffstat (limited to 'lib/lz4frame_static.h')
| -rw-r--r-- | lib/lz4frame_static.h | 104 |
1 files changed, 88 insertions, 16 deletions
diff --git a/lib/lz4frame_static.h b/lib/lz4frame_static.h index f2228a5..a59b94b 100644 --- a/lib/lz4frame_static.h +++ b/lib/lz4frame_static.h @@ -43,7 +43,15 @@ extern "C" { /* lz4frame_static.h should be used solely in the context of static linking. * It contains definitions which are not stable and may change in the future. * Never use it in the context of DLL linking. - * */ + * + * Defining LZ4F_PUBLISH_STATIC_FUNCTIONS allows one to override this. Use at + * your own risk. + */ +#ifdef LZ4F_PUBLISH_STATIC_FUNCTIONS +#define LZ4FLIB_STATIC_API LZ4FLIB_API +#else +#define LZ4FLIB_STATIC_API +#endif /* --- Dependency --- */ @@ -52,27 +60,91 @@ extern "C" { /* --- Error List --- */ #define LZ4F_LIST_ERRORS(ITEM) \ - ITEM(OK_NoError) ITEM(ERROR_GENERIC) \ - ITEM(ERROR_maxBlockSize_invalid) ITEM(ERROR_blockMode_invalid) ITEM(ERROR_contentChecksumFlag_invalid) \ + ITEM(OK_NoError) \ + ITEM(ERROR_GENERIC) \ + ITEM(ERROR_maxBlockSize_invalid) \ + ITEM(ERROR_blockMode_invalid) \ + ITEM(ERROR_contentChecksumFlag_invalid) \ ITEM(ERROR_compressionLevel_invalid) \ - ITEM(ERROR_headerVersion_wrong) ITEM(ERROR_blockChecksum_unsupported) ITEM(ERROR_reservedFlag_set) \ + ITEM(ERROR_headerVersion_wrong) \ + ITEM(ERROR_blockChecksum_invalid) \ + ITEM(ERROR_reservedFlag_set) \ ITEM(ERROR_allocation_failed) \ - ITEM(ERROR_srcSize_tooLarge) ITEM(ERROR_dstMaxSize_tooSmall) \ - ITEM(ERROR_frameHeader_incomplete) ITEM(ERROR_frameType_unknown) ITEM(ERROR_frameSize_wrong) \ + ITEM(ERROR_srcSize_tooLarge) \ + ITEM(ERROR_dstMaxSize_tooSmall) \ + ITEM(ERROR_frameHeader_incomplete) \ + ITEM(ERROR_frameType_unknown) \ + ITEM(ERROR_frameSize_wrong) \ ITEM(ERROR_srcPtr_wrong) \ ITEM(ERROR_decompressionFailed) \ - ITEM(ERROR_headerChecksum_invalid) ITEM(ERROR_contentChecksum_invalid) \ + ITEM(ERROR_headerChecksum_invalid) \ + ITEM(ERROR_contentChecksum_invalid) \ + ITEM(ERROR_frameDecoding_alreadyStarted) \ ITEM(ERROR_maxCode) -#define LZ4F_DISABLE_OLD_ENUMS /* comment to enable deprecated enums */ -#ifndef LZ4F_DISABLE_OLD_ENUMS -# define LZ4F_GENERATE_ENUM(ENUM) LZ4F_##ENUM, ENUM = LZ4F_##ENUM, -#else -# define LZ4F_GENERATE_ENUM(ENUM) LZ4F_##ENUM, -#endif -typedef enum { LZ4F_LIST_ERRORS(LZ4F_GENERATE_ENUM) } LZ4F_errorCodes; /* enum is exposed, to handle specific errors; compare function result to -enum value */ - -LZ4F_errorCodes LZ4F_getErrorCode(size_t functionResult); +#define LZ4F_GENERATE_ENUM(ENUM) LZ4F_##ENUM, + +/* enum list is exposed, to handle specific errors */ +typedef enum { LZ4F_LIST_ERRORS(LZ4F_GENERATE_ENUM) } LZ4F_errorCodes; + +LZ4FLIB_STATIC_API LZ4F_errorCodes LZ4F_getErrorCode(size_t functionResult); + + + +/********************************** + * Bulk processing dictionary API + *********************************/ +typedef struct LZ4F_CDict_s LZ4F_CDict; + +/*! LZ4_createCDict() : + * When compressing multiple messages / blocks with the same dictionary, it's recommended to load it just once. + * LZ4_createCDict() will create a digested dictionary, ready to start future compression operations without startup delay. + * LZ4_CDict can be created once and shared by multiple threads concurrently, since its usage is read-only. + * `dictBuffer` can be released after LZ4_CDict creation, since its content is copied within CDict */ +LZ4FLIB_STATIC_API LZ4F_CDict* LZ4F_createCDict(const void* dictBuffer, size_t dictSize); +LZ4FLIB_STATIC_API void LZ4F_freeCDict(LZ4F_CDict* CDict); + + +/*! LZ4_compressFrame_usingCDict() : + * Compress an entire srcBuffer into a valid LZ4 frame using a digested Dictionary. + * If cdict==NULL, compress without a dictionary. + * dstBuffer MUST be >= LZ4F_compressFrameBound(srcSize, preferencesPtr). + * If this condition is not respected, function will fail (@return an errorCode). + * The LZ4F_preferences_t structure is optional : you may provide NULL as argument, + * but it's not recommended, as it's the only way to provide dictID in the frame header. + * @return : number of bytes written into dstBuffer. + * or an error code if it fails (can be tested using LZ4F_isError()) */ +LZ4FLIB_STATIC_API size_t LZ4F_compressFrame_usingCDict( + void* dst, size_t dstCapacity, + const void* src, size_t srcSize, + const LZ4F_CDict* cdict, + const LZ4F_preferences_t* preferencesPtr); + + +/*! LZ4F_compressBegin_usingCDict() : + * Inits streaming dictionary compression, and writes the frame header into dstBuffer. + * dstCapacity must be >= LZ4F_HEADER_SIZE_MAX bytes. + * `prefsPtr` is optional : you may provide NULL as argument, + * however, it's the only way to provide dictID in the frame header. + * @return : number of bytes written into dstBuffer for the header, + * or an error code (which can be tested using LZ4F_isError()) */ +LZ4FLIB_STATIC_API size_t LZ4F_compressBegin_usingCDict( + LZ4F_cctx* cctx, + void* dstBuffer, size_t dstCapacity, + const LZ4F_CDict* cdict, + const LZ4F_preferences_t* prefsPtr); + + +/*! LZ4F_decompress_usingDict() : + * Same as LZ4F_decompress(), using a predefined dictionary. + * Dictionary is used "in place", without any preprocessing. + * It must remain accessible throughout the entire frame decoding. */ +LZ4FLIB_STATIC_API size_t LZ4F_decompress_usingDict( + LZ4F_dctx* dctxPtr, + void* dstBuffer, size_t* dstSizePtr, + const void* srcBuffer, size_t* srcSizePtr, + const void* dict, size_t dictSize, + const LZ4F_decompressOptions_t* decompressOptionsPtr); #if defined (__cplusplus) |