Adding upstream version 1.0.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

utils.go

@@ -0,0 +1,71 @@
+// Copyright 2014 The Macaron Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package cache
+
+import (
+	"errors"
+)
+
+func Incr(val any) (any, error) {
+	switch valTyp := val.(type) {
+	case int:
+		val = valTyp + 1
+	case int32:
+		val = valTyp + 1
+	case int64:
+		val = valTyp + 1
+	case uint:
+		val = valTyp + 1
+	case uint32:
+		val = valTyp + 1
+	case uint64:
+		val = valTyp + 1
+	default:
+		return val, errors.New("item value is not int-type")
+	}
+	return val, nil
+}
+
+func Decr(val any) (any, error) {
+	switch valTyp := val.(type) {
+	case int:
+		val = valTyp - 1
+	case int32:
+		val = valTyp - 1
+	case int64:
+		val = valTyp - 1
+	case uint:
+		if valTyp > 0 {
+			val = valTyp - 1
+		} else {
+			return val, errors.New("item value is less than 0")
+		}
+	case uint32:
+		if valTyp > 0 {
+			val = valTyp - 1
+		} else {
+			return val, errors.New("item value is less than 0")
+		}
+	case uint64:
+		if valTyp > 0 {
+			val = valTyp - 1
+		} else {
+			return val, errors.New("item value is less than 0")
+		}
+	default:
+		return val, errors.New("item value is not int-type")
+	}
+	return val, nil
+}