/
unmoji.go
158 lines (132 loc) · 3.61 KB
/
unmoji.go
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package main
import (
"bytes"
"flag"
"fmt"
"github.com/moshee/mojibake"
"io"
"os"
"strings"
)
func init() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
flag.PrintDefaults()
fmt.Fprintf(os.Stderr, `Available encoding options for -encs:
utf-8, utf8, cp473: CP473 (assume UTF-8 input misinterpreted as ASCII)
sjis, shift-jis, cp932: CP932 (assume Shift-JIS input misinterpreted as UTF-8)
cjk, cp936: CP936 (assume CJK input misinterpreted as UTF-8)
`)
}
}
var (
flag_encs = flag.String("encs", "utf-8", "Comma-separated encoding path")
flag_args = flag.Bool("args", false, "Decode arguments instead of from STDIN")
flag_rename = flag.Bool("rename", false, "Like args but rename the named files to the decoded values")
flag_really = flag.Bool("really", false, "When -rename is given, actually do the renaming instead of just showing what will happen")
flag_force = flag.Bool("f", false, "Skip errors")
//flag_recurse = flag.Bool("r", false, "When -rename is given, perform renaming recursively through the given directories (THIS IS REALLY DANGEROUS)")
)
var enc_map = map[string]mojibake.Encoding{
"utf-8": mojibake.CP473,
"utf8": mojibake.CP473,
"cp473": mojibake.CP473,
"sjis": mojibake.CP932,
"shift-jis": mojibake.CP932,
"cp932": mojibake.CP932,
"cjk": mojibake.CP936,
"cp936": mojibake.CP936,
}
func main() {
flag.Parse()
if len(*flag_encs) == 0 {
fmt.Fprintln(os.Stderr, "unmoji: no encoding path given")
os.Exit(1)
}
enc_list := strings.Split(*flag_encs, ",")
encs := make([]mojibake.Encoding, 0, len(enc_list))
for _, enc_name := range enc_list {
if enc, ok := enc_map[enc_name]; ok {
encs = append(encs, enc)
} else {
fmt.Fprintf(os.Stderr, "unmoji: unknown encoding: %s\n", enc_name)
os.Exit(1)
}
}
if *flag_args || *flag_rename {
os.Exit(decode_args(encs))
} else {
os.Exit(decode_stdin(encs))
}
}
func decode_args(encs []mojibake.Encoding) int {
if flag.NArg() == 0 {
return 0
}
buf := new(bytes.Buffer)
dec, err := mojibake.NewDecoder(buf, encs...)
if err != nil {
fmt.Fprintf(os.Stderr, "unmoji: %v\n", err)
return 1
}
decoded := make([]string, 0, flag.NArg())
args := flag.Args()
// need this in case any of them error and -f is given
// so we can selectively include input filenames
input := make([]string, 0, len(args))
for _, garbled := range args {
r := strings.NewReader(garbled)
io.Copy(dec, r)
_, err := dec.Flush()
if err != nil {
if *flag_force {
continue
}
fmt.Fprintf(os.Stderr, "unmoji: %v\n", err)
dec.Close()
return 1
}
p := buf.Next(buf.Len())
input = append(input, garbled)
decoded = append(decoded, string(p))
}
dec.Close()
if !*flag_rename {
for _, s := range decoded {
fmt.Println(s)
}
return 0
}
if !*flag_really {
for i, filename := range input {
fmt.Printf("\"%s\" → \"%s\"\n", filename, decoded[i])
}
return 0
}
for i, filename := range input {
if filename == decoded[i] && !*flag_force {
fmt.Fprintf(os.Stderr, "unmoji: rename \"%s\": source and destination are the same\n", filename)
return 1
}
err := os.Rename(filename, decoded[i])
if err != nil && !*flag_force {
fmt.Fprintf(os.Stderr, "unmoji: %v\n", err)
return 1
}
}
return 0
}
func decode_stdin(encs []mojibake.Encoding) int {
decoder, err := mojibake.NewDecoder(os.Stdout, encs...)
if err != nil && !*flag_force {
fmt.Fprintf(os.Stderr, "unmoji: %v\n", err)
return 1
}
io.Copy(decoder, os.Stdin)
err = decoder.Close()
if err != nil && !*flag_force {
fmt.Fprintf(os.Stderr, "unmoji: %v\n", err)
return 1
}
return 0
}