diff options
Diffstat (limited to 'doc/progs/cat_rot13.go')
| -rw-r--r-- | doc/progs/cat_rot13.go | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/doc/progs/cat_rot13.go b/doc/progs/cat_rot13.go index 6cad78f5a..ea608b83d 100644 --- a/doc/progs/cat_rot13.go +++ b/doc/progs/cat_rot13.go @@ -15,12 +15,12 @@ var rot13_flag = flag.Bool("rot13", false, "rot13 the input") func rot13(b byte) byte { if 'a' <= b && b <= 'z' { - b = 'a' + ((b-'a')+13)%26; + b = 'a' + ((b - 'a') + 13) % 26; } if 'A' <= b && b <= 'Z' { - b = 'A' + ((b-'A')+13)%26; + b = 'A' + ((b - 'A') + 13) % 26 } - return b; + return b } type reader interface { @@ -29,23 +29,23 @@ type reader interface { } type rotate13 struct { - source reader; + source reader; } func newRotate13(source reader) *rotate13 { - return &rotate13{source}; + return &rotate13{source} } func (r13 *rotate13) Read(b []byte) (ret int, err os.Error) { r, e := r13.source.Read(b); for i := 0; i < r; i++ { - b[i] = rot13(b[i]); + b[i] = rot13(b[i]) } - return r, e; + return r, e } func (r13 *rotate13) String() string { - return r13.source.String(); + return r13.source.String() } // end of rotate13 implementation @@ -54,14 +54,14 @@ func cat(r reader) { var buf [NBUF]byte; if *rot13_flag { - r = newRotate13(r); + r = newRotate13(r) } for { switch nr, er := r.Read(&buf); { case nr < 0: fmt.Fprintf(os.Stderr, "error reading from %s: %s\n", r.String(), er.String()); os.Exit(1); - case nr == 0: // EOF + case nr == 0: // EOF return; case nr > 0: nw, ew := file.Stdout.Write(buf[0:nr]); @@ -73,7 +73,7 @@ func cat(r reader) { } func main() { - flag.Parse(); // Scans the arg list and sets up flags + flag.Parse(); // Scans the arg list and sets up flags if flag.NArg() == 0 { cat(file.Stdin); } |