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20 lines
521 B
Go
20 lines
521 B
Go
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package textseg
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import "unicode/utf8"
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// ScanGraphemeClusters is a split function for bufio.Scanner that splits
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// on UTF8 sequence boundaries.
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//
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// This is included largely for completeness, since this behavior is already
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// built in to Go when ranging over a string.
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func ScanUTF8Sequences(data []byte, atEOF bool) (int, []byte, error) {
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if len(data) == 0 {
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return 0, nil, nil
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}
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r, seqLen := utf8.DecodeRune(data)
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if r == utf8.RuneError && !atEOF {
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return 0, nil, nil
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}
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return seqLen, data[:seqLen], nil
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}
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