| // Copyright 2017 The Wuffs Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| // |
| // SPDX-License-Identifier: Apache-2.0 OR MIT |
| |
| //go:build ignore |
| // +build ignore |
| |
| package main |
| |
| // compress-giflzw.go applies GIF's LZW-compression. The initial byte in each |
| // written file is the LZW literal width. |
| // |
| // Usage: go run compress-giflzw.go < pi.txt > pi.txt.giflzw |
| |
| import ( |
| "compress/lzw" |
| "io" |
| "os" |
| ) |
| |
| func main() { |
| if err := main1(); err != nil { |
| os.Stderr.WriteString(err.Error() + "\n") |
| os.Exit(1) |
| } |
| } |
| |
| func main1() error { |
| os.Stdout.WriteString("\x08") |
| w := lzw.NewWriter(os.Stdout, lzw.LSB, 8) |
| if _, err := io.Copy(w, os.Stdin); err != nil { |
| w.Close() |
| return err |
| } |
| return w.Close() |
| } |
