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#include <rw/tools/snappy/RWSnappyCompressor.h>
Public Member Functions | |
RWSnappyCompressor () | |
int | compress (void *compressed, rwuint32 &compressed_length, const void *uncompressed, rwuint32 uncompressed_length) |
int | decompress (void *uncompressed, rwuint32 &uncompressed_length, const void *compressed, rwuint32 compressed_length) |
int | uncompressed_length (const void *compressed, rwuint32 compressed_length, rwuint32 &uncompressed_length) |
int | max_compressed_length (rwuint32 uncompressed_length, rwuint32 &compressed_length) |
Compressor adapter that compresses and decompresses data using the Google Snappy compression library.
RWSnappyCompressor::RWSnappyCompressor | ( | ) |
Initialize the compressor.
int RWSnappyCompressor::compress | ( | void * | compressed, | |
rwuint32 & | compressed_length, | |||
const void * | uncompressed, | |||
rwuint32 | uncompressed_length | |||
) |
Compresses uncompressed_length bytes of data from uncompressed into compressed and stores the number of compressed bytes in compressed_length.
Returns -1 if compressed_length is not of sufficient size to store the compressed data.
int RWSnappyCompressor::decompress | ( | void * | uncompressed, | |
rwuint32 & | uncompressed_length, | |||
const void * | compressed, | |||
rwuint32 | compressed_length | |||
) |
Decompress compressed_length bytes of data from compressed and place it into uncompressed, and stores the number of uncompressed bytes to uncompressed_length on success.
Returns -1 if uncompressed_length is not of sufficient size to store the decompressed data or if compressed refers to data that could not be decompressed.
int RWSnappyCompressor::max_compressed_length | ( | rwuint32 | uncompressed_length, | |
rwuint32 & | compressed_length | |||
) |
Calculates the maximum number of bytes needed to store a compressed byte array given uncompressed_length bytes of uncompressed data. Stores the result in compressed_length.
Returns 0 on success.
int RWSnappyCompressor::uncompressed_length | ( | const void * | compressed, | |
rwuint32 | compressed_length, | |||
rwuint32 & | uncompressed_length | |||
) |
Calculates the number of bytes needed to store an uncompressed byte array given compressed_length bytes of compressed data stored in compressed. Stores the result in uncompressed_length.
Returns -1 to indicate that the compressed data stream was invalid.
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