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68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
//
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// MacintoshVolume.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 25/08/2019.
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// Copyright © 2019 Thomas Harte. All rights reserved.
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//
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#include "MacintoshVolume.hpp"
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using namespace Storage::MassStorage::Encodings::Macintosh;
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void Mapper::set_drive_type(DriveType drive_type, size_t number_of_blocks) {
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drive_type_ = drive_type;
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number_of_blocks_ = number_of_blocks;
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}
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size_t Mapper::get_number_of_blocks() {
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return number_of_blocks_ + 5;
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}
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ssize_t Mapper::to_source_address(size_t address) {
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/*
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Reserve one block at the start of the device
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for a partition map.
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TODO: and four or so more for a driver?
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*/
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return ssize_t(address) - 5;
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}
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std::vector<uint8_t> Mapper::convert_source_block(ssize_t source_address, std::vector<uint8_t> source_data) {
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switch(source_address) {
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case -5: {
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uint32_t total_device_blocks = uint32_t(number_of_blocks_ + 5);
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/* The driver descriptor. */
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std::vector<uint8_t> driver_description = {
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0x45, 0x52, /* device signature */
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0x02, 0x00, /* block size, in bytes */
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uint8_t(total_device_blocks >> 24),
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uint8_t(total_device_blocks >> 16),
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uint8_t(total_device_blocks >> 8),
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uint8_t(total_device_blocks),
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/* number of blocks on device */
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0x00, 0x00, /* reserved (device ID?) */
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0x00, 0x00, /* reserved */
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0x00, 0x00, /* reserved */
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0x00, 0x01, /* number of device descriptor entries */
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0x00, 0x01, /* first device descriptor's starting block */
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0x00, 0x04, /* size of device driver */
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0x00, 0x01, /* operating system (MacOS = 1) */
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};
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driver_description.resize(512);
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return driver_description;
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}
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case -4: case -3: case -2: case -1: /* TODO */
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return std::vector<uint8_t>(512);
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default: return source_data;
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}
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}
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