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https://github.com/golang/go
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38 lines
726 B
Go
38 lines
726 B
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2010 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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// Issue 1011. Removing either #1 or #3 avoided the crash at #2.
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package main
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import (
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"io"
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"strings"
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)
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func readU16BE(b []byte) uint16 {
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b[0] = 0
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b[1] = 1
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return uint16(b[0])<<8 + uint16(b[1]) // #1
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n := uint16(b[0])<<8 + uint16(b[1])
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return n
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}
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func readStr(r io.Reader, b []byte) string {
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n := readU16BE(b)
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if int(n) > len(b) {
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return "err: n>b"
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}
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io.ReadFull(r, b[0:n]) // #2
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return string(b[0:n]) // #3
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return "ok"
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}
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func main() {
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br := strings.NewReader("abcd")
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readStr(br, make([]byte, 256))
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}
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