add KStr.Quotemeta

string.go

@@ -1396,3 +1396,16 @@ func (ks *LkkString) UnSerialize(data []byte, register ...interface{}) (val inte
 	err = dec.Decode(&val)
 	return
 }
+
+// Quotemeta 转义元字符集,包括 . \ + * ? [ ^ ] ( $ )等.
+func (ks *LkkString) Quotemeta(str string) string {
+	var buf bytes.Buffer
+	for _, char := range str {
+		switch char {
+		case '.', '+', '\\', '(', '$', ')', '[', '^', ']', '*', '?':
+			buf.WriteRune('\\')
+		}
+		buf.WriteRune(char)
+	}
+	return buf.String()
+}

string_test.go

@@ -2500,3 +2500,20 @@ func BenchmarkString_UnSerialize(b *testing.B) {
 		_, _ = KStr.UnSerialize(str)
 	}
 }
+
+func TestString_Quotemeta(t *testing.T) {
+	var res string
+
+	res = KStr.Quotemeta("")
+	assert.Empty(t, res)
+
+	res = KStr.Quotemeta(tesStr35)
+	assert.Contains(t, res, '\\')
+}
+
+func BenchmarkString_Quotemeta(b *testing.B) {
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		KStr.Quotemeta(tesStr35)
+	}
+}

testdata.go

@@ -166,6 +166,7 @@ var tesStr31 = "\014\012\011\013 abc  \015"
 var tesStr32 = "\f\n\t\v\r\f"
 var tesStr33 = "x\n\t\t\t\t"
 var tesStr34 = "\f\n\t  \n\n\n   \v\r\f"
+var tesStr35 = "Hi jac. $a=3*5, (can you hear me?)"
 
 //中文名
 var tesChineseName1 = "李四"