32 lines
598 B
Go
32 lines
598 B
Go
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package clickhouse
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import (
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"strings"
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"unicode"
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)
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// wordMatcher is a simple automata to match a single word (case insensitive)
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type wordMatcher struct {
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word []rune
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position uint8
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}
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// newMatcher returns matcher for word needle
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func newMatcher(needle string) *wordMatcher {
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return &wordMatcher{word: []rune(strings.ToUpper(needle)),
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position: 0}
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}
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func (m *wordMatcher) matchRune(r rune) bool {
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if m.word[m.position] == unicode.ToUpper(r) {
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if m.position == uint8(len(m.word)-1) {
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m.position = 0
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return true
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}
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m.position++
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} else {
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m.position = 0
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}
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return false
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}
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