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CLK/Storage/Disk/Encodings/MFM/Parser.cpp
2018-05-13 15:19:52 -04:00

57 lines
1.6 KiB
C++

//
// Parser.cpp
// Clock Signal
//
// Created by Thomas Harte on 24/09/2017.
// Copyright 2017 Thomas Harte. All rights reserved.
//
#include "Parser.hpp"
#include "Constants.hpp"
#include "../../Track/TrackSerialiser.hpp"
#include "SegmentParser.hpp"
using namespace Storage::Encodings::MFM;
Parser::Parser(bool is_mfm, const std::shared_ptr<Storage::Disk::Disk> &disk) :
disk_(disk), is_mfm_(is_mfm) {}
void Parser::install_sectors_from_track(const Storage::Disk::Track::Address &address) {
if(sectors_by_address_by_track_.find(address) != sectors_by_address_by_track_.end()) {
return;
}
std::shared_ptr<Storage::Disk::Track> track = disk_->get_track_at_position(address);
if(!track) {
return;
}
std::map<std::size_t, Sector> sectors = sectors_from_segment(
Storage::Disk::track_serialisation(*track, is_mfm_ ? MFMBitLength : FMBitLength),
is_mfm_);
std::map<int, Storage::Encodings::MFM::Sector> sectors_by_id;
for(const auto &sector : sectors) {
sectors_by_id.insert(std::make_pair(sector.second.address.sector, std::move(sector.second)));
}
sectors_by_address_by_track_.insert(std::make_pair(address, std::move(sectors_by_id)));
}
Sector *Parser::get_sector(int head, int track, uint8_t sector) {
Disk::Track::Address address(head, Storage::Disk::HeadPosition(track));
install_sectors_from_track(address);
auto sectors = sectors_by_address_by_track_.find(address);
if(sectors == sectors_by_address_by_track_.end()) {
return nullptr;
}
auto stored_sector = sectors->second.find(sector);
if(stored_sector == sectors->second.end()) {
return nullptr;
}
return &stored_sector->second;
}