1 /* 2 * Memory region abstractions. 3 * 4 * Copyright (C) 2021 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #include <systypes/base.h> 25 26 #include "types.h" 27 28 29 30 /* Region-related state information. */ 31 32 class RegionState 33 { 34 public: 35 unsigned long size; 36 fileid_t fileid; 37 offset_t filepos; 38 39 explicit RegionState(unsigned long size=0, fileid_t fileid=0, offset_t filepos=0); 40 41 void fill(fileid_t fileid, offset_t filepos); 42 43 bool valid() { return size != 0; } 44 }; 45 46 47 48 /* A memory region abstraction. */ 49 50 class Region 51 { 52 public: 53 offset_t start, end; 54 55 /* Debugging information. */ 56 57 RegionState state; 58 59 /* Methods. */ 60 61 explicit Region(offset_t start, offset_t end); 62 63 virtual ~Region(); 64 65 offset_t size(); 66 67 int compare(Region *other); 68 69 void fill(fileid_t fileid, offset_t filepos); 70 71 void flush(); 72 73 /* Simulation methods. */ 74 75 char *read(offset_t offset=0); 76 77 void write(const char *data, offset_t offset=0); 78 }; 79 80 // vim: tabstop=4 expandtab shiftwidth=4