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51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
//
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// PRG.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 27/08/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#include "PRG.hpp"
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#include <cstdio>
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#include <sys/stat.h>
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#include "../Encodings/CommodoreROM.hpp"
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using namespace Storage::Cartridge;
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PRG::PRG(const char *file_name)
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{
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struct stat file_stats;
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stat(file_name, &file_stats);
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// accept only files sized 1, 2, 4 or 8kb
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if(
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file_stats.st_size != 0x400 + 2 &&
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file_stats.st_size != 0x800 + 2 &&
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file_stats.st_size != 0x1000 + 2 &&
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file_stats.st_size != 0x2000 + 2)
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throw ErrorNotROM;
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// get the loading address, and the rest of the contents
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FILE *file = fopen(file_name, "rb");
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int loading_address = fgetc(file);
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loading_address |= fgetc(file) << 8;
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size_t data_length = (size_t)file_stats.st_size - 2;
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std::vector<uint8_t> contents(data_length);
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fread(&contents[0], 1, (size_t)(data_length), file);
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fclose(file);
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// accept only files intended to load at 0xa000
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if(loading_address != 0xa000)
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throw ErrorNotROM;
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// also accept only cartridges with the proper signature
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if(!Storage::Cartridge::Encodings::CommodoreROM::isROM(contents))
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throw ErrorNotROM;
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_segments.emplace_back(0xa000, 0xa000 + data_length, std::move(contents));
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}
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