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96 lines
2.3 KiB
C++
96 lines
2.3 KiB
C++
//
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// StaticAnalyser.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 17/03/2021.
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// Copyright © 2021 Thomas Harte. All rights reserved.
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//
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#include "StaticAnalyser.hpp"
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#include "../../../Storage/Disk/Encodings/MFM/Parser.hpp"
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#include "../../../Storage/Tape/Parsers/Spectrum.hpp"
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#include "Target.hpp"
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namespace {
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bool IsSpectrumTape(const std::shared_ptr<Storage::Tape::Tape> &tape) {
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using Parser = Storage::Tape::ZXSpectrum::Parser;
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Parser parser(Parser::MachineType::ZXSpectrum);
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while(true) {
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const auto block = parser.find_block(tape);
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if(!block) break;
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// Check for a Spectrum header block.
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if(block->type == 0x00) {
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return true;
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}
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}
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return false;
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}
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bool IsSpectrumDisk(const std::shared_ptr<Storage::Disk::Disk> &disk) {
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Storage::Encodings::MFM::Parser parser(Storage::Encodings::MFM::Density::Double, disk);
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// Get logical sector 1; the Spectrum appears to support various physical
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// sectors as sector 1.
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const Storage::Encodings::MFM::Sector *boot_sector = nullptr;
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uint8_t sector_mask = 0;
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while(!boot_sector) {
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boot_sector = parser.sector(0, 0, sector_mask + 1);
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sector_mask += 0x40;
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if(!sector_mask) break;
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}
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if(!boot_sector) return false;
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// Test that the contents of the boot sector sum to 3, modulo 256.
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uint8_t byte_sum = 0;
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for(auto byte: boot_sector->samples[0]) {
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byte_sum += byte;
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}
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return byte_sum == 3;
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}
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}
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Analyser::Static::TargetList Analyser::Static::ZXSpectrum::GetTargets(const Media &media, const std::string &, TargetPlatform::IntType) {
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TargetList destination;
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auto target = std::make_unique<Target>();
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target->confidence = 0.5;
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if(!media.tapes.empty()) {
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bool has_spectrum_tape = false;
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for(auto &tape: media.tapes) {
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has_spectrum_tape |= IsSpectrumTape(tape);
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}
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if(has_spectrum_tape) {
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target->media.tapes = media.tapes;
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}
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}
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if(!media.disks.empty()) {
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bool has_spectrum_disk = false;
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for(auto &disk: media.disks) {
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has_spectrum_disk |= IsSpectrumDisk(disk);
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}
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if(has_spectrum_disk) {
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target->media.disks = media.disks;
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target->model = Target::Model::Plus3;
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}
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}
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// If any media survived, add the target.
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if(!target->media.empty()) {
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target->should_hold_enter = true; // To force entry into the 'loader' and thereby load the media.
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destination.push_back(std::move(target));
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}
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return destination;
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}
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