mirror of
https://github.com/golang/go
synced 2024-11-25 13:47:57 -07:00
38 lines
726 B
Go
38 lines
726 B
Go
|
// $G $D/$F.go && $L $F.$A && ./$A.out
|
||
|
|
|
||
|
|
// Copyright 2010 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
// Issue 1011. Removing either #1 or #3 avoided the crash at #2.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
func readU16BE(b []byte) uint16 {
|
||
|
|
b[0] = 0
|
||
|
|
b[1] = 1
|
||
|
|
return uint16(b[0])<<8 + uint16(b[1]) // #1
|
||
|
|
n := uint16(b[0])<<8 + uint16(b[1])
|
||
|
|
return n
|
||
|
|
}
|
||
|
|
|
||
|
|
func readStr(r io.Reader, b []byte) string {
|
||
|
|
n := readU16BE(b)
|
||
|
|
if int(n) > len(b) {
|
||
|
|
return "err: n>b"
|
||
|
|
}
|
||
|
|
io.ReadFull(r, b[0:n]) // #2
|
||
|
|
return string(b[0:n]) // #3
|
||
|
|
return "ok"
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
br := strings.NewReader("abcd")
|
||
|
|
readStr(br, make([]byte, 256))
|
||
|
|
}
|