DataBlock.hh revision 6762:a22a47e60c21 
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() {
49    if(m_alloc) {
50      delete [] m_data;
51    }
52  }
53
54  DataBlock& operator=(const DataBlock& obj);
55
56  // Public Methods
57  void assign(uint8* data);
58
59  void clear();
60  uint8 getByte(int whichByte) const;
61  const uint8* getData(int offset, int len) const;
62  void setByte(int whichByte, uint8 data);
63  void setData(uint8* data, int offset, int len);
64  void copyPartial(const DataBlock & dblk, int offset, int len);
65  bool equal(const DataBlock& obj) const;
66  void print(ostream& out) const;
67
68private:
69  void alloc();
70  // Data Members (m_ prefix)
71  uint8* m_data;
72  bool m_alloc;
73};
74
75// Output operator declaration
76ostream& operator<<(ostream& out, const DataBlock& obj);
77
78bool operator==(const DataBlock& obj1, const DataBlock& obj2);
79
80// inline functions for speed
81
82inline
83void DataBlock::assign(uint8* data)
84{
85  delete [] m_data;
86  m_data = data;
87  m_alloc = false;
88}
89
90inline
91void DataBlock::alloc()
92{
93  m_data = new uint8[RubySystem::getBlockSizeBytes()];
94  m_alloc = true;
95  clear();
96}
97
98inline
99void DataBlock::clear()
100{
101  memset(m_data, 0, RubySystem::getBlockSizeBytes());
102}
103
104inline
105bool DataBlock::equal(const DataBlock& obj) const
106{
107  return !memcmp(m_data, obj.m_data, RubySystem::getBlockSizeBytes());
108}
109
110inline
111void DataBlock::print(ostream& out) const
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
123uint8 DataBlock::getByte(int whichByte) const
124{
125  return m_data[whichByte];
126}
127
128inline
129const uint8* DataBlock::getData(int offset, int len) const
130{
131  assert(offset + len <= RubySystem::getBlockSizeBytes());
132  return &m_data[offset];
133}
134
135inline
136void DataBlock::setByte(int whichByte, uint8 data)
137{
138    m_data[whichByte] = data;
139}
140
141inline
142void DataBlock::setData(uint8* data, int offset, int len)
143{
144  assert(offset + len <= RubySystem::getBlockSizeBytes());
145  memcpy(&m_data[offset], data, len);
146}
147
148inline
149void DataBlock::copyPartial(const DataBlock & dblk, int offset, int len)
150{
151  setData(&dblk.m_data[offset], offset, len);
152}
153
154// ******************* Definitions *******************
155
156// Output operator definition
157extern inline
158ostream& operator<<(ostream& out, const DataBlock& obj)
159{
160  obj.print(out);
161  out << flush;
162  return out;
163}
164
165extern inline
166bool operator==(const DataBlock& obj1,const DataBlock& obj2)
167{
168  return (obj1.equal(obj2));
169}
170
171#endif //DATABLOCK_H
172