132 lines
2.7 KiB
C++
132 lines
2.7 KiB
C++
/*
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epple2
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Copyright (C) 2008 by Christopher A. Mosher <cmosher01@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY, without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "diskbytes.h"
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#include <vector>
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#include <algorithm>
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#include <istream>
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#include <ostream>
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#include <fstream>
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DiskBytes::DiskBytes()
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{
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unload();
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}
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DiskBytes::~DiskBytes()
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{
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}
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bool DiskBytes::load(const std::string& filePath)
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{
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// TODO better I/O error handling during disk loading and saving
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std::ifstream in(filePath.c_str(),std::ios::binary|std::ios::in);
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if (!in.is_open())
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{
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return false;
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}
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if (isLoaded())
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{
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unload();
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}
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for (int t(0); t < TRACKS_PER_DISK; ++t)
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{
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this->bytes[t].resize(BYTES_PER_TRACK);
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in.read((char*)&this->bytes[t][0],BYTES_PER_TRACK);
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}
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in.close();
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this->filePath = filePath;
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checkForWriteProtection();
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this->loaded = true;
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this->modified = false;
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return true;
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}
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void DiskBytes::checkForWriteProtection()
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{
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std::ofstream outf(filePath.c_str(),std::ios::binary|std::ios::app);
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this->writable = outf.is_open();
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outf.close();
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}
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void DiskBytes::save()
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{
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if (isWriteProtected() || !isLoaded())
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{
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return;
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}
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std::ofstream out(filePath.c_str(),std::ios::binary);
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for (int t(0); t < TRACKS_PER_DISK; ++t)
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out.write((char*)&this->bytes[t][0],BYTES_PER_TRACK);
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out.flush();
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out.close();
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this->modified = false;
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}
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void DiskBytes::unload()
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{
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this->byt = 0;
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this->writable = true;
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this->loaded = false;
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this->filePath = "";
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this->modified = false;
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}
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unsigned char DiskBytes::get(const int track)
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{
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if (!isLoaded())
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{
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return 0xFF;
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}
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const unsigned char ret = this->bytes[track][this->byt];
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nextByte();
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return ret;
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}
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void DiskBytes::put(const unsigned char track, const unsigned char value)
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{
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if (TRACKS_PER_DISK <= track)
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{
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throw 0;
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}
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if (isWriteProtected() || !isLoaded())
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{
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return;
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}
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this->bytes[track][this->byt] = value;
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this->modified = true;
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nextByte();
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}
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void inline DiskBytes::nextByte()
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{
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// emulates circular disk track
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++this->byt;
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if (this->byt >= BYTES_PER_TRACK)
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{
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this->byt = 0;
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}
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}
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