miniz - Easy zlib compression

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Note

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Example

-- Prepare the data
local bigdata = "123jfoiq4hlkfjbnasdilfhuqwo;hfashfp9qw38hrfaios;hfiuoaghfluaeisw"
-- compressed, the compressed data is zlib-compatible, other languages can be decompressed through zlib-related libraries
local cdata = miniz.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("miniz", "before", #bigdata, "after", #cdata)
    log.info("miniz", "cdata as hex", cdata:toHex())

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

Constant

constant	type	explanation
miniz.WRITE_ZLIB_HEADER	int	compression parameter, whether to write zlib header data, compress the default value of the function
miniz.COMPUTE_ADLER32	int	Compression/Decompression Parameters, Calculation/Verification adler-32
miniz.GREEDY_PARSING_FLAG	int	The compression parameter, whether to process quickly greedy, and the slower processing mode is used by default.
miniz.NONDETERMINISTIC_PARSING_FLAG	int	compression parameters, whether to quickly initialize the compressor
miniz.RLE_MATCHES	int	compression parameters, scan only RLE
miniz.FILTER_MATCHES	int	Compression parameter, filtering characters less than 5 times
miniz.FORCE_ALL_STATIC_BLOCKS	int	Compression parameter, whether to disable the optimized Huffman table.
miniz.FORCE_ALL_RAW_BLOCKS	int	Compression parameter, whether to only use raw blocks
miniz.PARSE_ZLIB_HEADER	int	Decompression parameter, whether to process the zlib header, uncompress the default value of the function.
miniz.HAS_MORE_INPUT	int	Decompression parameters, whether there is more data, only streaming decompression is available, not currently supported
miniz.USING_NON_WRAPPING_OUTPUT_BUF	int	Decompression parameters, whether the decompression interval is sufficient for all data,, only streaming decompression is available, not currently supported
miniz.COMPUTE_ADLER32	int	Decompression parameters, mandatory verification adler-32

miniz.compress(data, flags)

Fast compression, requires 165kb of system memory and 32kb of LuaVM memory

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.
flags	The compression parameter, which is miniz.WRITE_ZLIB_HEADER by default, that is, written to the zlib header

Return Value

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

Examples

local bigdata = "123jfoiq4hlkfjbnasdilfhuqwo;hfashfp9qw38hrfaios;hfiuoaghfluaeisw"
local cdata = miniz.compress(bigdata)
if cdata then
    log.info("miniz", "before", #bigdata, "after", #cdata)
    log.info("miniz", "cdata as hex", cdata:toHex())
end

---

miniz.uncompress(data, flags)

Fast decompression, requires 32kb of LuaVM memory

Parameters

Incoming Value Type	Explanation
string	Data to be decompressed. The decompressed data cannot be greater 32k
flags	Decompression parameter. The default value is miniz.PARSE_ZLIB_HEADER, that is, the zlib header is parsed.

Return Value

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

Examples

local bigdata = "123jfoiq4hlkfjbnasdilfhuqwo;hfashfp9qw38hrfaios;hfiuoaghfluaeisw"
local cdata = miniz.compress(bigdata)
if cdata then
    log.info("miniz", "before", #bigdata, "after", #cdata)
    log.info("miniz", "cdata as hex", cdata:toHex())

    local udata = miniz.uncompress(cdata)
    log.info("miniz", "udata", udata)
end

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