DataBlock.hh revision 7002:48a19d52d939 
1
2/*
3 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#ifndef DATABLOCK_H
31#define DATABLOCK_H
32
33#include <iomanip>
34#include <iostream>
35
36#include "mem/ruby/common/Global.hh"
37#include "mem/ruby/system/System.hh"
38#include "mem/gems_common/Vector.hh"
39
40class DataBlock {
41 public:
42  // Constructors
43  DataBlock() {alloc();}
44  DataBlock(const DataBlock & cp) {
45    m_data = new uint8[RubySystem::getBlockSizeBytes()];
46    memcpy(m_data, cp.m_data, RubySystem::getBlockSizeBytes());
47    m_alloc = true;
48  }
49
50  // Destructor
51  ~DataBlock() {
52    if(m_alloc) {
53      delete [] m_data;
54    }
55  }
56
57  DataBlock& operator=(const DataBlock& obj);
58
59  // Public Methods
60  void assign(uint8* data);
61
62  void clear();
63  uint8 getByte(int whichByte) const;
64  const uint8* getData(int offset, int len) const;
65  void setByte(int whichByte, uint8 data);
66  void setData(uint8* data, int offset, int len);
67  void copyPartial(const DataBlock & dblk, int offset, int len);
68  bool equal(const DataBlock& obj) const;
69  void print(std::ostream& out) const;
70
71private:
72  void alloc();
73  // Data Members (m_ prefix)
74  uint8* m_data;
75  bool m_alloc;
76};
77
78// Output operator declaration
79std::ostream& operator<<(std::ostream& out, const DataBlock& obj);
80
81bool operator==(const DataBlock& obj1, const DataBlock& obj2);
82
83// inline functions for speed
84
85inline
86void DataBlock::assign(uint8* data)
87{
88  if (m_alloc) {
89    delete [] m_data;
90  }
91  m_data = data;
92  m_alloc = false;
93}
94
95inline
96void DataBlock::alloc()
97{
98  m_data = new uint8[RubySystem::getBlockSizeBytes()];
99  m_alloc = true;
100  clear();
101}
102
103inline
104void DataBlock::clear()
105{
106  memset(m_data, 0, RubySystem::getBlockSizeBytes());
107}
108
109inline
110bool DataBlock::equal(const DataBlock& obj) const
111{
112  return !memcmp(m_data, obj.m_data, RubySystem::getBlockSizeBytes());
113}
114
115inline
116void DataBlock::print(std::ostream& out) const
117{
118  using namespace std;
119
120  int size = RubySystem::getBlockSizeBytes();
121  out << "[ ";
122  for (int i = 0; i < size; i++) {
123    out << setw(2) << setfill('0') << hex << "0x" << (int)m_data[i] << " ";
124    out << setfill(' ');
125  }
126  out << dec << "]" << flush;
127}
128
129inline
130uint8 DataBlock::getByte(int whichByte) const
131{
132  return m_data[whichByte];
133}
134
135inline
136const uint8* DataBlock::getData(int offset, int len) const
137{
138  assert(offset + len <= RubySystem::getBlockSizeBytes());
139  return &m_data[offset];
140}
141
142inline
143void DataBlock::setByte(int whichByte, uint8 data)
144{
145    m_data[whichByte] = data;
146}
147
148inline
149void DataBlock::setData(uint8* data, int offset, int len)
150{
151  assert(offset + len <= RubySystem::getBlockSizeBytes());
152  memcpy(&m_data[offset], data, len);
153}
154
155inline
156void DataBlock::copyPartial(const DataBlock & dblk, int offset, int len)
157{
158  setData(&dblk.m_data[offset], offset, len);
159}
160
161// ******************* Definitions *******************
162
163// Output operator definition
164extern inline
165std::ostream& operator<<(std::ostream& out, const DataBlock& obj)
166{
167  obj.print(out);
168  out << std::flush;
169  return out;
170}
171
172extern inline
173bool operator==(const DataBlock& obj1,const DataBlock& obj2)
174{
175  return (obj1.equal(obj2));
176}
177
178#endif //DATABLOCK_H
179