Function stringFixedDistanceCharFilter

stringprefixfilter.go:287–318

(ch rune, distance, minRequiredLength int)

}

func stringFixedDistanceCharFilter(ch rune, distance, minRequiredLength int) StringPrefixFilter {
	if distance < 0 {
		return nil
	}

	return func(input string, startAt int) (candidateByteIndex int, ok bool) {
		if !hasMinRequiredBytes(input, startAt, minRequiredLength) {
			return 0, false
		}

		searchAt := startAt
		for {
			offset := strings.IndexRune(input[searchAt:], ch)
			if offset < 0 {
				return 0, false
			}
			byteIndex := searchAt + offset
			candidateByteIndex, ok := stringFixedDistanceCandidateStart(input, startAt, byteIndex, distance)
			if ok && hasMinRequiredBytes(input, candidateByteIndex, minRequiredLength) {
				return candidateByteIndex, true
			}
			if ok {
				return 0, false
			}
			_, size := utf8.DecodeRuneInString(input[byteIndex:])
			if size == 0 {
				return 0, false
			}
			searchAt = byteIndex + size
		}
	}
}

func stringFixedDistanceStringFilter(literal string, distance, minRequiredLength int) StringPrefixFilter {
	if literal == "" || distance < 0 || len(literal) > maxStringFilterLiteralLen {