Lua

Decompress Gzip Data In-Place Using BinData

See more Gzip Examples

This example demonstrates how to use the UncompressBd method to decompress Gzip data stored in a BinData object.

The compressed .gz file is first loaded into memory. The UncompressBd method then decompresses the data in-place, meaning the original compressed bytes in the BinData object are replaced with the uncompressed data.

After decompression, the example writes the resulting data to a file. This approach is useful when working entirely in memory before saving or further processing the uncompressed data.

Lua

local chilkat = require("chilkat")

-- This example demonstrates how to decompress Gzip data stored in a BinData object.
-- The decompression is done in-place, replacing the compressed data with the original data.

local gzip = chilkat.Gzip.new()
local bd = chilkat.BinData.new()

-- Load a .gz file into BinData:
local success = bd:load_file("example.txt.gz")
if not success then
    print(bd.last_error_text)
    return
end

print("Compressed size (bytes): " .. bd.num_bytes)

-- Uncompress the data in-place:
success = gzip:uncompress_bd(bd)
if not success then
    print(gzip.last_error_text)
    return
end

print("Decompressed size (bytes): " .. bd.num_bytes)

-- Save the uncompressed data to a file:
success = bd:write_file("example.txt")
if not success then
    print(bd.last_error_text)
    return
end

print("File successfully uncompressed to example.txt")