DataBlock.hh revision 6631:5437a0eeb822 
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 "mem/ruby/common/Global.hh"
34#include "mem/ruby/system/System.hh"
35#include "mem/gems_common/Vector.hh"
36
37class DataBlock {
38 public:
39  // Constructors
40  DataBlock() {alloc();}
41  DataBlock(const DataBlock & cp) {
42    m_data = new uint8[RubySystem::getBlockSizeBytes()];
43    memcpy(m_data, cp.m_data, RubySystem::getBlockSizeBytes());
44    m_alloc = true;
45  }
46
47  // Destructor
48  ~DataBlock() { if(m_alloc) delete [] m_data;}
49
50  DataBlock& operator=(const DataBlock& obj);
51
52  // Public Methods
53  void assign(uint8* data);
54
55  void clear();
56  uint8 getByte(int whichByte) const;
57  const uint8* getData(int offset, int len) const;
58  void setByte(int whichByte, uint8 data);
59  void setData(uint8* data, int offset, int len);
60  void copyPartial(const DataBlock & dblk, int offset, int len);
61  bool equal(const DataBlock& obj) const;
62  void print(ostream& out) const;
63
64private:
65  void alloc();
66  // Data Members (m_ prefix)
67  uint8* m_data;
68  bool m_alloc;
69};
70
71// Output operator declaration
72ostream& operator<<(ostream& out, const DataBlock& obj);
73
74bool operator==(const DataBlock& obj1, const DataBlock& obj2);
75
76// inline functions for speed
77
78inline
79void DataBlock::assign(uint8* data)
80{
81  delete [] m_data;
82  m_data = data;
83  m_alloc = false;
84}
85
86inline
87void DataBlock::alloc()
88{
89  m_data = new uint8[RubySystem::getBlockSizeBytes()];
90  m_alloc = true;
91  clear();
92}
93
94inline
95void DataBlock::clear()
96{
97  memset(m_data, 0, RubySystem::getBlockSizeBytes());
98}
99
100inline
101bool DataBlock::equal(const DataBlock& obj) const
102{
103  return !memcmp(m_data, obj.m_data, RubySystem::getBlockSizeBytes());
104}
105
106inline
107void DataBlock::print(ostream& out) const
108{
109  int size = RubySystem::getBlockSizeBytes();
110  out << "[ ";
111  for (int i = 0; i < size; i++) {
112    out << setw(2) << setfill('0') << hex << "0x" << (int)m_data[i] << " ";
113    out << setfill(' ');
114  }
115  out << dec << "]" << flush;
116}
117
118inline
119uint8 DataBlock::getByte(int whichByte) const
120{
121  return m_data[whichByte];
122}
123
124inline
125const uint8* DataBlock::getData(int offset, int len) const
126{
127  assert(offset + len <= RubySystem::getBlockSizeBytes());
128  return &m_data[offset];
129}
130
131inline
132void DataBlock::setByte(int whichByte, uint8 data)
133{
134    m_data[whichByte] = data;
135}
136
137inline
138void DataBlock::setData(uint8* data, int offset, int len)
139{
140  assert(offset + len <= RubySystem::getBlockSizeBytes());
141  memcpy(&m_data[offset], data, len);
142}
143
144inline
145void DataBlock::copyPartial(const DataBlock & dblk, int offset, int len)
146{
147  setData(&dblk.m_data[offset], offset, len);
148}
149
150// ******************* Definitions *******************
151
152// Output operator definition
153extern inline
154ostream& operator<<(ostream& out, const DataBlock& obj)
155{
156  obj.print(out);
157  out << flush;
158  return out;
159}
160
161extern inline
162bool operator==(const DataBlock& obj1,const DataBlock& obj2)
163{
164  return (obj1.equal(obj2));
165}
166
167#endif //DATABLOCK_H
168