DataBlock.hh revision 7454:3a3e8e8cce1b 
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 <iomanip>
33#include <iostream>
34
35#include "mem/ruby/common/Global.hh"
36#include "mem/ruby/system/System.hh"
37
38class DataBlock
39{
40  public:
41    DataBlock()
42    {
43        alloc();
44    }
45
46    DataBlock(const DataBlock &cp)
47    {
48        m_data = new uint8[RubySystem::getBlockSizeBytes()];
49        memcpy(m_data, cp.m_data, RubySystem::getBlockSizeBytes());
50        m_alloc = true;
51    }
52
53    ~DataBlock()
54    {
55        if (m_alloc)
56            delete [] m_data;
57    }
58
59    DataBlock& operator=(const DataBlock& obj);
60
61    void assign(uint8* data);
62
63    void clear();
64    uint8 getByte(int whichByte) const;
65    const uint8* getData(int offset, int len) const;
66    void setByte(int whichByte, uint8 data);
67    void setData(uint8* data, int offset, int len);
68    void copyPartial(const DataBlock & dblk, int offset, int len);
69    bool equal(const DataBlock& obj) const;
70    void print(std::ostream& out) const;
71
72  private:
73    void alloc();
74    uint8* m_data;
75    bool m_alloc;
76};
77
78inline void
79DataBlock::assign(uint8* data)
80{
81    if (m_alloc) {
82        delete [] m_data;
83    }
84    m_data = data;
85    m_alloc = false;
86}
87
88inline void
89DataBlock::alloc()
90{
91    m_data = new uint8[RubySystem::getBlockSizeBytes()];
92    m_alloc = true;
93    clear();
94}
95
96inline void
97DataBlock::clear()
98{
99    memset(m_data, 0, RubySystem::getBlockSizeBytes());
100}
101
102inline bool
103DataBlock::equal(const DataBlock& obj) const
104{
105    return !memcmp(m_data, obj.m_data, RubySystem::getBlockSizeBytes());
106}
107
108inline void
109DataBlock::print(std::ostream& out) const
110{
111    using namespace std;
112
113    int size = RubySystem::getBlockSizeBytes();
114    out << "[ ";
115    for (int i = 0; i < size; i++) {
116        out << setw(2) << setfill('0') << hex << "0x" << (int)m_data[i] << " ";
117        out << setfill(' ');
118    }
119    out << dec << "]" << flush;
120}
121
122inline uint8
123DataBlock::getByte(int whichByte) const
124{
125    return m_data[whichByte];
126}
127
128inline const uint8*
129DataBlock::getData(int offset, int len) const
130{
131    assert(offset + len <= RubySystem::getBlockSizeBytes());
132    return &m_data[offset];
133}
134
135inline void
136DataBlock::setByte(int whichByte, uint8 data)
137{
138    m_data[whichByte] = data;
139}
140
141inline void
142DataBlock::setData(uint8* data, int offset, int len)
143{
144    assert(offset + len <= RubySystem::getBlockSizeBytes());
145    memcpy(&m_data[offset], data, len);
146}
147
148inline void
149DataBlock::copyPartial(const DataBlock & dblk, int offset, int len)
150{
151    setData(&dblk.m_data[offset], offset, len);
152}
153
154inline std::ostream&
155operator<<(std::ostream& out, const DataBlock& obj)
156{
157    obj.print(out);
158    out << std::flush;
159    return out;
160}
161
162inline bool
163operator==(const DataBlock& obj1,const DataBlock& obj2)
164{
165    return obj1.equal(obj2);
166}
167
168#endif // __MEM_RUBY_COMMON_DATABLOCK_HH__
169