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File modified for the Linux Kernel by
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Zeev Tarantov <zeev.tarantov@gmail.com>
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#define CSNAPPY_VERSION 4
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#define CSNAPPY_WORKMEM_BYTES_POWER_OF_TWO 15
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#define CSNAPPY_WORKMEM_BYTES (1 << CSNAPPY_WORKMEM_BYTES_POWER_OF_TWO)
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#define __attribute__(x) /*NOTHING*/
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* Returns the maximal size of the compressed representation of
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* input data that is "source_len" bytes in length;
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csnappy_max_compressed_length(uint32_t source_len) __attribute__((const));
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* Flat array compression that does not emit the "uncompressed length"
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* prefix. Compresses "input" array to the "output" array.
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* REQUIRES: "input" is at most 32KiB long.
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* REQUIRES: "output" points to an array of memory that is at least
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* "csnappy_max_compressed_length(input_length)" in size.
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* REQUIRES: working_memory has (1 << workmem_bytes_power_of_two) bytes.
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* REQUIRES: 9 <= workmem_bytes_power_of_two <= 15.
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* Returns an "end" pointer into "output" buffer.
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* "end - output" is the compressed size of "input".
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csnappy_compress_fragment(
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const uint32_t input_length,
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const int workmem_bytes_power_of_two);
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* REQUIRES: "compressed" must point to an area of memory that is at
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* least "csnappy_max_compressed_length(input_length)" bytes in length.
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* REQUIRES: working_memory has (1 << workmem_bytes_power_of_two) bytes.
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* REQUIRES: 9 <= workmem_bytes_power_of_two <= 15.
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* Takes the data stored in "input[0..input_length-1]" and stores
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* it in the array pointed to by "compressed".
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* "*out_compressed_length" is set to the length of the compressed output.
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uint32_t input_length,
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uint32_t *out_compressed_length,
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const int workmem_bytes_power_of_two);
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* Reads header of compressed data to get stored length of uncompressed data.
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* REQUIRES: start points to compressed data.
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* REQUIRES: n is length of available compressed data.
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* Returns SNAPPY_E_HEADER_BAD on error.
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* Returns number of bytes read from input on success.
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* Stores decoded length into *result.
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csnappy_get_uncompressed_length(
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* Safely decompresses all data from array "src" of length "src_len" containing
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* entire compressed stream (with header) into array "dst" of size "dst_len".
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* REQUIRES: dst_len is at least csnappy_get_uncompressed_length(...).
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* Iff successful, returns CSNAPPY_E_OK.
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* If recorded length in header is greater than dst_len, returns
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* CSNAPPY_E_OUTPUT_INSUF.
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* If compressed data is malformed, does not write more than dst_len into dst.
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* Safely decompresses stream src_len bytes long read from src to dst.
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* Amount of available space at dst must be provided in *dst_len by caller.
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* If compressed stream needs more space, it will not overflow and return
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* CSNAPPY_E_OUTPUT_OVERRUN.
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* On success, sets *dst_len to actal number of bytes decompressed.
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* Iff successful, returns CSNAPPY_E_OK.
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csnappy_decompress_noheader(
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* Return values (< 0 = Error)
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#define CSNAPPY_E_OK 0
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#define CSNAPPY_E_HEADER_BAD (-1)
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#define CSNAPPY_E_OUTPUT_INSUF (-2)
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#define CSNAPPY_E_OUTPUT_OVERRUN (-3)
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#define CSNAPPY_E_INPUT_NOT_CONSUMED (-4)
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#define CSNAPPY_E_DATA_MALFORMED (-5)
added
removed
snappy/csnappy.h
