1 /*
2 * Copyright (c) 2020-2022 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 #include "app_common.h"
17
HapGetInt64(const unsigned char * buf,int len)18 long long HapGetInt64(const unsigned char *buf, int len)
19 {
20 if (buf == NULL) {
21 return 0;
22 }
23 unsigned long long value = 0;
24 if (len != sizeof(long long)) {
25 return 0;
26 }
27 while (len-- > 0) {
28 value = (value << BYTE_BITS) | (*(buf + len));
29 }
30 return (long long)value;
31 }
32
HapGetInt(const unsigned char * buf,int len)33 int HapGetInt(const unsigned char *buf, int len)
34 {
35 unsigned int value = HapGetUnsignedInt(buf, len);
36 return (int)value;
37 }
38
HapGetUnsignedInt(const unsigned char * buf,int len)39 unsigned int HapGetUnsignedInt(const unsigned char *buf, int len)
40 {
41 if (buf == NULL) {
42 return 0;
43 }
44 unsigned int value = 0;
45 if (len != sizeof(int)) {
46 return 0;
47 }
48 while (len-- > 0) {
49 value = (value << BYTE_BITS) | (*(buf + len));
50 }
51 return value;
52 }
53
HapGetShort(const unsigned char * buf,int len)54 short HapGetShort(const unsigned char *buf, int len)
55 {
56 if (buf == NULL) {
57 return 0;
58 }
59 unsigned short value = 0;
60 if (len != sizeof(short)) {
61 return 0;
62 }
63 while (len-- > 0) {
64 value = (value << BYTE_BITS) | (*(buf + len));
65 }
66 return (short)value;
67 }
68
HapPutInt32(unsigned char * buf,int len,int value)69 void HapPutInt32(unsigned char *buf, int len, int value)
70 {
71 if (buf == NULL || len < sizeof(int)) {
72 return;
73 }
74 int i;
75 unsigned int var = (unsigned int)value;
76 for (i = 0; i < sizeof(int); i++) {
77 buf[i] = var;
78 var = var >> (BYTE_BITS);
79 }
80 return;
81 }
82