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xml: use io.ReadByter in place of local readByter
R=cemeyer, rsc CC=golang-dev https://golang.org/cl/809041
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@ -107,10 +107,6 @@ type Directive []byte
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func (d Directive) Copy() Directive { return Directive(makeCopy(d)) }
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type readByter interface {
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ReadByte() (b byte, err os.Error)
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}
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// CopyToken returns a copy of a Token.
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func CopyToken(t Token) Token {
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switch v := t.(type) {
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@ -167,7 +163,7 @@ type Parser struct {
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//
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Entity map[string]string
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r readByter
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r io.ReadByter
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buf bytes.Buffer
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stk *stack
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free *stack
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@ -194,7 +190,7 @@ func NewParser(r io.Reader) *Parser {
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// Assume that if reader has its own
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// ReadByte, it's efficient enough.
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// Otherwise, use bufio.
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if rb, ok := r.(readByter); ok {
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if rb, ok := r.(io.ReadByter); ok {
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p.r = rb
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} else {
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p.r = bufio.NewReader(r)
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