Simple program to decompress TIFF-flavoured LZW compressed files

tiff-lzw.go

package main

// To run, first install image/tiff/lzw with:
// go get golang.org/x/image/tiff/lzw
// Then run like `cat my.lzw | go run tiff-lzw.go`

import (
	"bufio"
	"fmt"
	"golang.org/x/image/tiff/lzw"
	"io/ioutil"
	"os"
)

func main() {
	// Read and decompress LZW Bytes from stdin
	lzwReader := lzw.NewReader(os.Stdin, lzw.MSB, 8)
	b, err := ioutil.ReadAll(lzwReader)
	if err != nil {
		panic(err)
	}

	// Write decompressed Bytes to stdout
	w := bufio.NewWriter(os.Stdout)
	n, err := w.Write(b)
	if err != nil {
		panic(err)
	}
	w.Flush()

	// Print summary
	fmt.Fprintf(os.Stderr, "%d bytes decompressed\n", n)
}