1 /*
2 * \file       trc_raw_buffer.h
3 * \brief      OpenCSD : Trace raw data byte buffer
4 *
5 * \copyright  Copyright (c) 2019, ARM Limited. All Rights Reserved.
6 */
7 
8 /*
9 * Redistribution and use in source and binary forms, with or without modification,
10 * are permitted provided that the following conditions are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the copyright holder nor the names of its contributors
20 * may be used to endorse or promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
25 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
30 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34 
35 #ifndef ARM_TRC_RAW_BUFFER_H_INCLUDED
36 #define ARM_TRC_RAW_BUFFER_H_INCLUDED
37 
38 #include <vector>
39 
40 class TraceRawBuffer
41 {
42 public:
43     TraceRawBuffer() :
44         m_bufSize(0),
45         m_bufProcessed(0),
46         m_pBuffer(0),
47         pkt(0)
48     {};
49     ~TraceRawBuffer() {};
50 
51     // init the buffer
52     void init(const uint32_t size, const uint8_t *rawtrace, std::vector<uint8_t> *out_packet);
53     void copyByteToPkt();   // move a byte to the packet buffer
54     uint8_t peekNextByte(); // value of next byte in buffer.
55 
56     bool empty() { return m_bufProcessed == m_bufSize; };
57     // bytes processed.
58     uint32_t processed() { return m_bufProcessed; };
59     // buffer size;
60     uint32_t size() { return m_bufSize; }
61 
62 private:
63     uint32_t m_bufSize;
64     uint32_t m_bufProcessed;
65     const uint8_t *m_pBuffer;
66     std::vector<uint8_t> *pkt;
67 
68 };
69 
70 // init the buffer
71 inline void TraceRawBuffer::init(const uint32_t size, const uint8_t *rawtrace, std::vector<uint8_t> *out_packet)
72 {
73     m_bufSize = size;
74     m_bufProcessed = 0;
75     m_pBuffer = rawtrace;
76     pkt = out_packet;
77 }
78 
79 inline void TraceRawBuffer::copyByteToPkt()
80 {
81     if (!empty()) {
82         pkt->push_back(m_pBuffer[m_bufProcessed]);
83         m_bufProcessed++;
84     }
85 }
86 
87 inline uint8_t TraceRawBuffer::peekNextByte()
88 {
89     uint8_t val = 0;
90     if (!empty())
91         val = m_pBuffer[m_bufProcessed];
92     return val;
93 }
94 
95 #endif // ARM_TRC_RAW_BUFFER_H_INCLUDED
96 
97