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 the `Appender` class.
32 */
33
34 #include "appender.hpp"
35
36 namespace ot {
37
Appender(Message & aMessage)38 Appender::Appender(Message &aMessage)
39 : mType(kMessage)
40 {
41 mShared.mMessage.mMessage = &aMessage;
42 mShared.mMessage.mStartOffset = aMessage.GetLength();
43 }
44
Appender(uint8_t * aBuffer,uint16_t aSize)45 Appender::Appender(uint8_t *aBuffer, uint16_t aSize)
46 : mType(kBuffer)
47 {
48 mShared.mFrameBuilder.Init(aBuffer, aSize);
49 }
50
AppendBytes(const void * aBuffer,uint16_t aLength)51 Error Appender::AppendBytes(const void *aBuffer, uint16_t aLength)
52 {
53 Error error = kErrorNone;
54
55 switch (mType)
56 {
57 case kMessage:
58 error = mShared.mMessage.mMessage->AppendBytes(aBuffer, aLength);
59 break;
60
61 case kBuffer:
62 error = mShared.mFrameBuilder.AppendBytes(aBuffer, aLength);
63 break;
64 }
65
66 return error;
67 }
68
GetAppendedLength(void) const69 uint16_t Appender::GetAppendedLength(void) const
70 {
71 uint16_t length = 0;
72
73 switch (mType)
74 {
75 case kMessage:
76 length = mShared.mMessage.mMessage->GetLength() - mShared.mMessage.mStartOffset;
77 break;
78
79 case kBuffer:
80 length = mShared.mFrameBuilder.GetLength();
81 break;
82 }
83
84 return length;
85 }
86
GetAsData(Data<kWithUint16Length> & aData) const87 void Appender::GetAsData(Data<kWithUint16Length> &aData) const
88 {
89 aData.Init(mShared.mFrameBuilder.GetBytes(), mShared.mFrameBuilder.GetLength());
90 }
91
92 } // namespace ot
93
