fastlz - FastLZ Compression

Adapted Air780E Air780EP Air780EPS

Note

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Example

-- Differences with the miniz library
-- The memory requirement is much smaller, miniz library is close to 200k, fastlz only needs 32k original data size
-- compression ratio, the compression ratio of miniz is better fastlz

-- Prepare the data
local bigdata = "123jfoiq4hlkfjbnasdilfhuqwo;hfashfp9qw38hrfaios;hfiuoaghfluaeisw"
-- compressed
local cdata = fastlz.compress(bigdata) 
-- lua The string of is equivalent to char[] with length, which can store all data including 0x 00
if cdata then
    -- Check data size before and after compression
    log.info("fastlz", "before", #bigdata, "after", #cdata)
    log.info("fastlz", "cdata as hex", cdata:toHex())

    -- Decompress to get the original text
    local udata = fastlz.uncompress(cdata)
    log.info("fastlz", "udata", udata)
end

fastlz.compress(data, level)

fast compression

Parameters

Incoming Value Type	Explanation
string	The data to be compressed. It is not recommended to compress data less than 400 bytes, and the compressed data cannot be larger 32k
int	Compression level, default 1, optional 1 or 2, 2 compression ratio is higher (sometimes)

Return Value

return value type	explanation
string	If the compression is successful, return the data string, otherwise return nil

Examples

-- Note that the memory consumption of the compression process is as follows
-- System memory, fixed 32k
-- lua Memory, 1.05 times the size of the original data, minimum 1024 bytes.

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fastlz.uncompress(data, maxout)

Fast Decompression

Parameters

Incoming Value Type	Explanation
string	Data to be compressed
int	The maximum size after decompression, the default is 4k, can be adjusted as needed

Return Value

return value type	explanation
string	If the decompression is successful, return the data string, otherwise return nil

Examples

None

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