Implement route rules

adapter/route/domain/matcher.go

@@ -0,0 +1,47 @@
+package domain
+
+import "unicode/utf8"
+
+type Matcher struct {
+	set *succinctSet
+}
+
+func NewMatcher(domains []string, domainSuffix []string) *Matcher {
+	var domainList []string
+	for _, domain := range domains {
+		domainList = append(domainList, reverseDomain(domain))
+	}
+	for _, domain := range domainSuffix {
+		domainList = append(domainList, reverseDomainSuffix(domain))
+	}
+	return &Matcher{
+		newSuccinctSet(domainList),
+	}
+}
+
+func (m *Matcher) Match(domain string) bool {
+	return m.set.Has(reverseDomain(domain))
+}
+
+func reverseDomain(domain string) string {
+	l := len(domain)
+	b := make([]byte, l)
+	for i := 0; i < l; {
+		r, n := utf8.DecodeRuneInString(domain[i:])
+		i += n
+		utf8.EncodeRune(b[l-i:], r)
+	}
+	return string(b)
+}
+
+func reverseDomainSuffix(domain string) string {
+	l := len(domain)
+	b := make([]byte, l+1)
+	for i := 0; i < l; {
+		r, n := utf8.DecodeRuneInString(domain[i:])
+		i += n
+		utf8.EncodeRune(b[l-i:], r)
+	}
+	b[l] = prefixLabel
+	return string(b)
+}