38 lines
518 B
Go
38 lines
518 B
Go
package buffer
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import (
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"bytes"
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"io"
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"unicode/utf8"
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)
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type (
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StreamBuffer struct {
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input io.Reader
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}
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)
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func NewStreamBuffer(input io.Reader) *StreamBuffer {
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return &StreamBuffer{
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input: input,
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}
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}
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func (b *StreamBuffer) Next() rune {
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var (
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buf bytes.Buffer
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)
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for {
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rbuf := make([]byte, 1)
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if n, err := b.input.Read(rbuf); n != 1 || err != nil {
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return 0
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}
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buf.Write(rbuf)
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if ok := utf8.FullRune(buf.Bytes()); ok {
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r, _ := utf8.DecodeRune(buf.Bytes())
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return r
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}
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}
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return 0
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}
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