DataBlock.hh revision 6351:31d19bdd9d85 
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  const uint8* getBlock() const;
60  uint8* copyData(uint8* dest, int offset, int size) const;
61  void setBlock(uint8* data) { setData(data, 0, RubySystem::getBlockSizeBytes()); }
62  void setData(uint8* data, int offset, int len);
63  void copyPartial(const DataBlock & dblk, int offset, int len);
64  bool equal(const DataBlock& obj) const;
65  void print(ostream& out) const;
66
67private:
68  void alloc();
69  // Data Members (m_ prefix)
70  uint8* m_data;
71  bool m_alloc;
72};
73
74// Output operator declaration
75ostream& operator<<(ostream& out, const DataBlock& obj);
76
77bool operator==(const DataBlock& obj1, const DataBlock& obj2);
78
79// inline functions for speed
80
81inline
82void DataBlock::assign(uint8* data)
83{
84  delete [] m_data;
85  m_data = data;
86  m_alloc = false;
87}
88
89inline
90void DataBlock::alloc()
91{
92  m_data = new uint8[RubySystem::getBlockSizeBytes()];
93  m_alloc = true;
94  clear();
95}
96
97inline
98void DataBlock::clear()
99{
100  memset(m_data, 0, RubySystem::getBlockSizeBytes());
101}
102
103inline
104bool DataBlock::equal(const DataBlock& obj) const
105{
106  return !memcmp(m_data, obj.m_data, RubySystem::getBlockSizeBytes());
107}
108
109inline
110void DataBlock::print(ostream& out) const
111{
112  int size = RubySystem::getBlockSizeBytes();
113  out << "[ ";
114  for (int i = 0; i < size; i+=4) {
115    out << hex << *((uint32*)(&(m_data[i]))) << " ";
116  }
117  out << dec << "]" << flush;
118}
119
120inline
121uint8 DataBlock::getByte(int whichByte) const
122{
123  return m_data[whichByte];
124}
125
126inline
127const uint8* DataBlock::getData(int offset, int len) const
128{
129  assert(offset + len <= RubySystem::getBlockSizeBytes());
130  return &m_data[offset];
131}
132
133inline
134void DataBlock::setByte(int whichByte, uint8 data)
135{
136    m_data[whichByte] = data;
137}
138
139inline
140void DataBlock::setData(uint8* data, int offset, int len)
141{
142  assert(offset + len <= RubySystem::getBlockSizeBytes());
143  memcpy(&m_data[offset], data, len);
144}
145
146inline
147void DataBlock::copyPartial(const DataBlock & dblk, int offset, int len)
148{
149  setData(&dblk.m_data[offset], offset, len);
150}
151
152inline
153const uint8* DataBlock::getBlock() const
154{
155  return m_data;
156}
157
158inline
159uint8* DataBlock::copyData(uint8* dest, int offset, int size) const
160{
161  assert(offset + size <= RubySystem::getBlockSizeBytes());
162  memcpy(dest, m_data + offset, size);
163  return dest;
164}
165
166
167// ******************* Definitions *******************
168
169// Output operator definition
170extern inline
171ostream& operator<<(ostream& out, const DataBlock& obj)
172{
173  obj.print(out);
174  out << flush;
175  return out;
176}
177
178extern inline
179bool operator==(const DataBlock& obj1,const DataBlock& obj2)
180{
181  return (obj1.equal(obj2));
182}
183
184#endif //DATABLOCK_H
185