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51 lines
1.7 KiB
C++
51 lines
1.7 KiB
C++
//
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// MFMSectorDump.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 30/09/2017.
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// Copyright © 2017 Thomas Harte. All rights reserved.
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//
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#include "MFMSectorDump.hpp"
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#include "Utility/ImplicitSectors.hpp"
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using namespace Storage::Disk;
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MFMSectorDump::MFMSectorDump(const char *file_name) : Storage::FileHolder(file_name) {}
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void MFMSectorDump::set_geometry(int sectors_per_track, uint8_t sector_size, bool is_double_density) {
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sectors_per_track_ = sectors_per_track;
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sector_size_ = sector_size;
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is_double_density_ = is_double_density;
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}
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std::shared_ptr<Track> MFMSectorDump::get_track_at_position(unsigned int head, unsigned int position) {
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uint8_t sectors[(128 << sector_size_)*sectors_per_track_];
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if(head > 1) return nullptr;
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long file_offset = get_file_offset_for_position(head, position);
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{
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std::lock_guard<std::mutex> lock_guard(file_access_mutex_);
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fseek(file_, file_offset, SEEK_SET);
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fread(sectors, 1, sizeof(sectors), file_);
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}
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return track_for_sectors(sectors, (uint8_t)position, (uint8_t)head, 0, sector_size_, is_double_density_);
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}
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void MFMSectorDump::set_track_at_position(unsigned int head, unsigned int position, const std::shared_ptr<Track> &track) {
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uint8_t parsed_track[(128 << sector_size_)*sectors_per_track_];
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// Assumption here: sector IDs will run from 0.
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decode_sectors(*track, parsed_track, 0, (uint8_t)(sectors_per_track_-1), sector_size_, is_double_density_);
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long file_offset = get_file_offset_for_position(head, position);
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std::lock_guard<std::mutex> lock_guard(file_access_mutex_);
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ensure_file_is_at_least_length(file_offset);
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fseek(file_, file_offset, SEEK_SET);
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fwrite(parsed_track, 1, sizeof(parsed_track), file_);
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fflush(file_);
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}
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