DataBlock.hh revision 7039:bc0b6ea676b5 
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/gems_common/Vector.hh"
36#include "mem/ruby/common/Global.hh"
37#include "mem/ruby/system/System.hh"
38
39class DataBlock
40{
41  public:
42    DataBlock()
43    {
44        alloc();
45    }
46
47    DataBlock(const DataBlock &cp)
48    {
49        m_data = new uint8[RubySystem::getBlockSizeBytes()];
50        memcpy(m_data, cp.m_data, RubySystem::getBlockSizeBytes());
51        m_alloc = true;
52    }
53
54    ~DataBlock()
55    {
56        if (m_alloc)
57            delete [] m_data;
58    }
59
60    DataBlock& operator=(const DataBlock& obj);
61
62    void assign(uint8* data);
63
64    void clear();
65    uint8 getByte(int whichByte) const;
66    const uint8* getData(int offset, int len) const;
67    void setByte(int whichByte, uint8 data);
68    void setData(uint8* data, int offset, int len);
69    void copyPartial(const DataBlock & dblk, int offset, int len);
70    bool equal(const DataBlock& obj) const;
71    void print(std::ostream& out) const;
72
73  private:
74    void alloc();
75    uint8* m_data;
76    bool m_alloc;
77};
78
79inline void
80DataBlock::assign(uint8* data)
81{
82    if (m_alloc) {
83        delete [] m_data;
84    }
85    m_data = data;
86    m_alloc = false;
87}
88
89inline void
90DataBlock::alloc()
91{
92    m_data = new uint8[RubySystem::getBlockSizeBytes()];
93    m_alloc = true;
94    clear();
95}
96
97inline void
98DataBlock::clear()
99{
100    memset(m_data, 0, RubySystem::getBlockSizeBytes());
101}
102
103inline bool
104DataBlock::equal(const DataBlock& obj) const
105{
106    return !memcmp(m_data, obj.m_data, RubySystem::getBlockSizeBytes());
107}
108
109inline void
110DataBlock::print(std::ostream& out) const
111{
112    using namespace std;
113
114    int size = RubySystem::getBlockSizeBytes();
115    out << "[ ";
116    for (int i = 0; i < size; i++) {
117        out << setw(2) << setfill('0') << hex << "0x" << (int)m_data[i] << " ";
118        out << setfill(' ');
119    }
120    out << dec << "]" << flush;
121}
122
123inline uint8
124DataBlock::getByte(int whichByte) const
125{
126    return m_data[whichByte];
127}
128
129inline const uint8*
130DataBlock::getData(int offset, int len) const
131{
132    assert(offset + len <= RubySystem::getBlockSizeBytes());
133    return &m_data[offset];
134}
135
136inline void
137DataBlock::setByte(int whichByte, uint8 data)
138{
139    m_data[whichByte] = data;
140}
141
142inline void
143DataBlock::setData(uint8* data, int offset, int len)
144{
145    assert(offset + len <= RubySystem::getBlockSizeBytes());
146    memcpy(&m_data[offset], data, len);
147}
148
149inline void
150DataBlock::copyPartial(const DataBlock & dblk, int offset, int len)
151{
152    setData(&dblk.m_data[offset], offset, len);
153}
154
155inline std::ostream&
156operator<<(std::ostream& out, const DataBlock& obj)
157{
158    obj.print(out);
159    out << std::flush;
160    return out;
161}
162
163inline bool
164operator==(const DataBlock& obj1,const DataBlock& obj2)
165{
166    return obj1.equal(obj2);
167}
168
169#endif // __MEM_RUBY_COMMON_DATABLOCK_HH__
170