diff options
Diffstat (limited to 'lib/lz4frame.h')
| -rw-r--r-- | lib/lz4frame.h | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/lib/lz4frame.h b/lib/lz4frame.h index 844255b..88a6513 100644 --- a/lib/lz4frame.h +++ b/lib/lz4frame.h @@ -140,6 +140,11 @@ typedef enum { } LZ4F_contentChecksum_t; typedef enum { + LZ4F_noBlockChecksum=0, + LZ4F_blockChecksumEnabled +} LZ4F_blockChecksum_t; + +typedef enum { LZ4F_frame=0, LZ4F_skippableFrame LZ4F_OBSOLETE_ENUM(skippableFrame) @@ -153,23 +158,23 @@ typedef LZ4F_contentChecksum_t contentChecksum_t; #endif /*! LZ4F_frameInfo_t : - * makes it possible to supply detailed frame parameters to the stream interface. - * It's not required to set all fields, as long as the structure was initially memset() to zero. - * All reserved fields must be set to zero. */ + * makes it possible to set or read frame parameters. + * It's not required to set all fields, as long as the structure was initially memset() to zero. + * For all fields, 0 sets it to default value */ typedef struct { LZ4F_blockSizeID_t blockSizeID; /* max64KB, max256KB, max1MB, max4MB ; 0 == default */ - LZ4F_blockMode_t blockMode; /* blockLinked, blockIndependent ; 0 == default */ - LZ4F_contentChecksum_t contentChecksumFlag; /* noContentChecksum, contentChecksumEnabled ; 0 == default */ - LZ4F_frameType_t frameType; /* LZ4F_frame, skippableFrame ; 0 == default */ + LZ4F_blockMode_t blockMode; /* LZ4F_blockLinked, LZ4F_blockIndependent ; 0 == default */ + LZ4F_contentChecksum_t contentChecksumFlag; /* if enabled, frame is terminated with a 32-bits checksum of decompressed data ; 0 == disabled (default) */ + LZ4F_frameType_t frameType; /* read-only field : LZ4F_frame or LZ4F_skippableFrame */ unsigned long long contentSize; /* Size of uncompressed content ; 0 == unknown */ unsigned dictID; /* Dictionary ID, sent by the compressor to help decoder select the correct dictionary; 0 == no dictID provided */ - unsigned reserved[1]; /* must be zero for forward compatibility */ + LZ4F_blockChecksum_t blockChecksumFlag; /* if enabled, each block is followed by a checksum of block's compressed data ; 0 == disabled (default) */ } LZ4F_frameInfo_t; /*! LZ4F_preferences_t : - * makes it possible to supply detailed compression parameters to the stream interface. - * It's not required to set all fields, as long as the structure was initially memset() to zero. - * All reserved fields must be set to zero. */ + * makes it possible to supply detailed compression parameters to the stream interface. + * It's not required to set all fields, as long as the structure was initially memset() to zero. + * All reserved fields must be set to zero. */ typedef struct { LZ4F_frameInfo_t frameInfo; int compressionLevel; /* 0 == default (fast mode); values above LZ4HC_CLEVEL_MAX count as LZ4HC_CLEVEL_MAX; values below 0 trigger "fast acceleration", proportional to value */ |