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// Copyright 2009 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.
package strings
import "os"
// A Reader satisfies calls to Read and ReadByte by
// reading from a string.
type Reader string
func (r *Reader) Read(b []byte) (n int, err os.Error) {
s := *r;
if len(s) == 0 {
return 0, os.EOF
}
for n < len(s) && n < len(b) {
b[n] = s[n];
n++;
}
*r = s[n:len(s)];
return;
}
func (r *Reader) ReadByte() (b byte, err os.Error) {
s := *r;
if len(s) == 0 {
return 0, os.EOF
}
b = s[0];
*r = s[1:len(s)];
return;
}
// NewReader returns a new Reader reading from s.
// It is similar to bytes.NewBufferString but more efficient and read-only.
func NewReader(s string) *Reader { return (*Reader)(&s) }