DataBlock.hh revision 6285
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+=4) { 112 out << hex << *((uint32*)(&(m_data[i]))) << " "; 113 } 114 out << dec << "]" << flush; 115} 116 117inline 118uint8 DataBlock::getByte(int whichByte) const 119{ 120 return m_data[whichByte]; 121} 122 123inline 124const uint8* DataBlock::getData(int offset, int len) const 125{ 126 assert(offset + len <= RubySystem::getBlockSizeBytes()); 127 return &m_data[offset]; 128} 129 130inline 131void DataBlock::setByte(int whichByte, uint8 data) 132{ 133 m_data[whichByte] = data; 134} 135 136inline 137void DataBlock::setData(uint8* data, int offset, int len) 138{ 139 assert(offset + len <= RubySystem::getBlockSizeBytes()); 140 memcpy(&m_data[offset], data, len); 141} 142 143inline 144void DataBlock::copyPartial(const DataBlock & dblk, int offset, int len) 145{ 146 setData(&dblk.m_data[offset], offset, len); 147} 148 149// ******************* Definitions ******************* 150 151// Output operator definition 152extern inline 153ostream& operator<<(ostream& out, const DataBlock& obj) 154{ 155 obj.print(out); 156 out << flush; 157 return out; 158} 159 160extern inline 161bool operator==(const DataBlock& obj1,const DataBlock& obj2) 162{ 163 return (obj1.equal(obj2)); 164} 165 166#endif //DATABLOCK_H 167