package main

import (
	"compress/zlib"
	"fmt"
	"io"
	"os"
)

func main() {
	if err := Main(os.Stdin, os.Stdout); err != nil {
		fmt.Fprintf(os.Stderr, "%s: error: %v\n", os.Args[0], err)
		os.Exit(1)
	}
}

func Main(zin io.Reader, out io.Writer) (err error) {
	maybeSetErr := func(_err error) {
		if err == nil && _err != nil {
			err = _err
		}
	}
	in, err := zlib.NewReader(zin)
	if err != nil {
		return err
	}
	defer func() {
		maybeSetErr(in.Close())
	}()
	if _, err := io.Copy(out, in); err != nil {
		return err
	}
	return nil
}