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