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Thomas Harte
52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
//
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// MOOF.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 15/02/2026.
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// Copyright © 2026 Thomas Harte. All rights reserved.
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//
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#include "MOOF.hpp"
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#include "Numeric/CRC.hpp"
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using namespace Storage::Disk;
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namespace {
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constexpr uint32_t chunk(const char *str) {
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return uint32_t(str[0] | (str[1] << 8) | (str[2] << 16) | (str[3] << 24));
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}
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}
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MOOF::MOOF(const std::string &file_name) :
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file_(file_name) {
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static constexpr char signature[] = {
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'M', 'O', 'O', 'F',
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char(0xff), 0x0a, 0x0d, 0x0a
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};
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if(!file_.check_signature<SignatureType::Binary>(signature)) {
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throw Error::InvalidFormat;
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}
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// Test the file's CRC32.
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const auto crc = file_.get_le<uint32_t>();
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post_crc_contents_ = file_.read(size_t(file_.stats().st_size - 12));
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const uint32_t computed_crc = CRC::CRC32::crc_of(post_crc_contents_);
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if(crc != computed_crc) {
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throw Error::InvalidFormat;
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}
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}
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HeadPosition MOOF::maximum_head_position() const {
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return HeadPosition(1);
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}
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std::unique_ptr<Track> MOOF::track_at_position(Track::Address) const {
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return nullptr;
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}
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bool MOOF::represents(const std::string &name) const {
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return name == file_.name();
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}
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