1 /*
2 * Copyright (c) 2021, The OpenThread Authors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /**
30 * @file
31 * This file implements `Data` related function
32 */
33
34 #include "data.hpp"
35
36 namespace ot {
37
MatchBytes(const uint8_t * aFirstBuffer,const uint8_t * aSecondBuffer,uint16_t aLength,ByteMatcher aMatcher)38 bool DataUtils::MatchBytes(const uint8_t *aFirstBuffer,
39 const uint8_t *aSecondBuffer,
40 uint16_t aLength,
41 ByteMatcher aMatcher)
42 {
43 bool matches = true;
44
45 if (aMatcher == nullptr)
46 {
47 matches = (memcmp(aFirstBuffer, aSecondBuffer, aLength) == 0);
48 ExitNow();
49 }
50
51 while (aLength-- != 0)
52 {
53 VerifyOrExit(aMatcher(*aFirstBuffer++, *aSecondBuffer++), matches = false);
54 }
55
56 exit:
57 return matches;
58 }
59
60 } // namespace ot
61
