local ffi = require "ffi"

local ffi_new = ffi.new

local ffi_typeof = ffi.typeof

local ffi_cdef = ffi.cdef

local ffi_load = ffi.load

local ffi_str = ffi.string

local C = ffi.C

local tonumber = tonumber

ffi_cdef[[

typedef enum {

SNAPPY_OK = 0,

SNAPPY_INVALID_INPUT = 1,

SNAPPY_BUFFER_TOO_SMALL = 2

} snappy_status;

snappy_status snappy_compress(const char* input, size_t input_length, char* compressed, size_t* compressed_length);

snappy_status snappy_uncompress(const char* compressed, size_t compressed_length, char* uncompressed, size_t* uncompressed_length);

size_t snappy_max_compressed_length(size_t source_length);

snappy_status snappy_uncompressed_length(const char* compressed, size_t compressed_length, size_t* result);

snappy_status snappy_validate_compressed_buffer(const char* compressed, size_t compressed_length);

]]

local lib = ffi_load "snappy"

local char_t = ffi_typeof "char[?]"

local size_t = ffi_typeof "size_t[1]"

local snappy = {}

function snappy.compress(input)

end

function snappy.uncompress(compressed)

end

function snappy.max_compressed_length(source_length)

return tonumber(lib.snappy_max_compressed_length(source_length))

end

function snappy.uncompressed_length(compressed)

end

function snappy.validate_compressed_buffer(compressed)

local status = lib.snappy_validate_compressed_buffer(compressed, #compressed)

return status == C.SNAPPY_OK

end

return snappy