1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16
Add(int e1,int e2)17 int Add(int e1, int e2)
18 {
19 int result = e1 + e2;
20 if ((e1 >= 0 && e2 >= 0 && result < 0) || (e1 < 0 && e2 < 0 && result >= 0)) {
21 result = -1;
22 }
23 return result;
24 }
25
Sub(int e1,int e2)26 int Sub(int e1, int e2)
27 {
28 int result = e1 - e2;
29 return result;
30 }
31
Mul(int e1,int e2)32 int Mul(int e1, int e2)
33 {
34 int result = e1 * e2;
35 if (!e1) {
36 return 0;
37 }
38 if ((result / e1) != e2) {
39 result = -1;
40 }
41 return result;
42 }
43
Div(int e1,int e2)44 int Div(int e1, int e2)
45 {
46 if (!e2) {
47 return -1;
48 }
49
50 int result = e1 / e2;
51 return result;
52 }
53