DataBlock.hh revision 11042:d34a75cb3646 
1/*
2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
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
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * 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 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef __MEM_RUBY_COMMON_DATABLOCK_HH__
30#define __MEM_RUBY_COMMON_DATABLOCK_HH__
31
32#include <inttypes.h>
33
34#include <cassert>
35#include <iomanip>
36#include <iostream>
37
38class DataBlock
39{
40  public:
41    DataBlock()
42    {
43        alloc();
44    }
45
46    DataBlock(const DataBlock &cp);
47
48    ~DataBlock()
49    {
50        if (m_alloc)
51            delete [] m_data;
52    }
53
54    DataBlock& operator=(const DataBlock& obj);
55
56    void assign(uint8_t *data);
57
58    void clear();
59    uint8_t getByte(int whichByte) const;
60    const uint8_t *getData(int offset, int len) const;
61    void setByte(int whichByte, uint8_t data);
62    void setData(const uint8_t *data, int offset, int len);
63    void copyPartial(const DataBlock & dblk, int offset, int len);
64    bool equal(const DataBlock& obj) const;
65    void print(std::ostream& out) const;
66
67  private:
68    void alloc();
69    uint8_t *m_data;
70    //! true if this DataBlock is responsible for deleting m_data,
71    //! false otherwise.
72    bool m_alloc;
73};
74
75inline void
76DataBlock::assign(uint8_t *data)
77{
78    assert(data != NULL);
79    if (m_alloc) {
80        delete [] m_data;
81    }
82    m_data = data;
83    m_alloc = false;
84}
85
86inline uint8_t
87DataBlock::getByte(int whichByte) const
88{
89    return m_data[whichByte];
90}
91
92inline void
93DataBlock::setByte(int whichByte, uint8_t data)
94{
95    m_data[whichByte] = data;
96}
97
98inline void
99DataBlock::copyPartial(const DataBlock & dblk, int offset, int len)
100{
101    setData(&dblk.m_data[offset], offset, len);
102}
103
104inline std::ostream&
105operator<<(std::ostream& out, const DataBlock& obj)
106{
107    obj.print(out);
108    out << std::flush;
109    return out;
110}
111
112inline bool
113operator==(const DataBlock& obj1,const DataBlock& obj2)
114{
115    return obj1.equal(obj2);
116}
117
118#endif // __MEM_RUBY_COMMON_DATABLOCK_HH__
119