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// Command zbase32-decode decodes zbase32 from arguments or lines of
// stdin.
//
// Usage:
//
// zbase32-decode ZBASE32..
// zbase32-decode <LINES_OF_ZBASE32
//
package main
import (
"bufio"
"flag"
"fmt"
"log"
"os"
"path/filepath"
"github.com/tv42/zbase32"
)
var prog = filepath.Base(os.Args[0])
func usage() {
fmt.Fprintf(os.Stderr, "Usage:\n")
fmt.Fprintf(os.Stderr, " %s ZBASE32..\n", prog)
fmt.Fprintf(os.Stderr, " %s <LINES_OF_ZBASE32\n", prog)
flag.PrintDefaults()
}
func main() {
log.SetFlags(0)
log.SetPrefix(prog + ": ")
flag.Usage = usage
flag.Parse()
if flag.NArg() > 0 {
for _, input := range flag.Args() {
decoded, err := zbase32.DecodeString(input)
if err != nil {
log.Fatalf("decoding input: %q: %v", input, err)
}
if _, err := os.Stdout.Write(decoded); err != nil {
log.Fatal(err)
}
}
} else {
scanner := bufio.NewScanner(os.Stdin)
for scanner.Scan() {
input := scanner.Text()
decoded, err := zbase32.DecodeString(input)
if err != nil {
log.Fatalf("decoding input: %q: %v", input, err)
}
if _, err = os.Stdout.Write(decoded); err != nil {
log.Fatal(err)
}
}
if err := scanner.Err(); err != nil {
log.Fatalf("reading standard input:", err)
}
}
}
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