mirror of
https://github.com/golang/go
synced 2024-11-18 19:44:46 -07:00
59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"flag";
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"fmt";
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"io";
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"os";
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"tabwriter";
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)
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var (
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tabwidth = flag.Int("tabwidth", 4, "tab width");
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usetabs = flag.Bool("usetabs", false, "align with tabs instead of blanks");
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)
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func error(format string, params ...) {
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fmt.Printf(format, params);
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os.Exit(1);
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}
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func untab(name string, src *os.File, dst *tabwriter.Writer) {
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n, err := io.Copy(src, dst);
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if err != nil {
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error("error while processing %s (%v)", name, err);
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}
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//dst.Flush();
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}
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func main() {
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flag.Parse();
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padchar := byte(' ');
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if *usetabs {
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padchar = '\t';
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}
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dst := tabwriter.NewWriter(os.Stdout, *tabwidth, 1, padchar, 0);
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if flag.NArg() > 0 {
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for i := 0; i < flag.NArg(); i++ {
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name := flag.Arg(i);
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src, err := os.Open(name, os.O_RDONLY, 0);
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if err != nil {
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error("could not open %s (%v)\n", name, err);
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}
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untab(name, src, dst);
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src.Close(); // ignore errors
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}
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} else {
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// no files => use stdin
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untab("/dev/stdin", os.Stdin, dst);
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}
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}
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