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62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
//
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// ROMMachine.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 07/11/2017.
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// Copyright 2017 Thomas Harte. All rights reserved.
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//
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#ifndef ROMMachine_hpp
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#define ROMMachine_hpp
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#include <functional>
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#include <memory>
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#include <string>
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#include <vector>
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namespace ROMMachine {
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/*!
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Describes a ROM image; this term is used in this emulator strictly in the sense of firmware —
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system software that is an inherent part of a machine.
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*/
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struct ROM {
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/// A descriptive name for this ROM, e.g. "Electron MOS 1.0".
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std::string descriptive_name;
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/// An idiomatic file name for this ROM, e.g. "os10.rom".
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std::string file_name;
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/// The expected size of this ROM in bytes, e.g. 32768.
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size_t size = 0;
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/// CRC32s for all known acceptable copies of this ROM; intended to allow a host platform
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/// to test user-provided ROMs of unknown provenance. **Not** intended to be used
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/// to exclude ROMs where the user's intent is otherwise clear.
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std::vector<uint32_t> crc32s;
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/// This is a temporary constructor provided for transitional purposes.
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ROM(std::string file_name) :
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file_name(file_name) {}
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ROM(std::string descriptive_name, std::string file_name, size_t size, uint32_t crc32) :
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descriptive_name(descriptive_name), file_name(file_name), size(size), crc32s({crc32}) {}
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ROM(std::string descriptive_name, std::string file_name, size_t size, std::vector<uint32_t> &crc32s) :
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descriptive_name(descriptive_name), file_name(file_name), size(size), crc32s(std::move(crc32s)) {}
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};
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/*!
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Defines the signature for a function that must be supplied by the host environment in order to give machines
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a route for fetching any system ROMs they might need.
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The caller will supply the idiomatic name of the machine plus a vector of the names of ROM files that it expects
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to be present. The recevier should return a vector of unique_ptrs that either contain the contents of the
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ROM from @c names that corresponds by index, or else are the nullptr
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*/
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typedef std::function<std::vector<std::unique_ptr<std::vector<uint8_t>>>(const std::string &machine, const std::vector<ROM> &roms)> ROMFetcher;
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enum class Error {
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MissingROMs
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};
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}
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#endif /* ROMMachine_h */
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