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Merge pull request #1263 from TomHarte/IMDFiles

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Add read-only support for IMD files.
This commit is contained in:
Thomas Harte 2023-12-08 16:50:19 -05:00 committed by GitHub
commit 671e59b27a
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6 changed files with 241 additions and 4 deletions
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2
Analyser/Static/StaticAnalyser.cpp
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@ -50,6 +50,7 @@
#include "../../Storage/Disk/DiskImage/Formats/FAT12.hpp"
#include "../../Storage/Disk/DiskImage/Formats/HFE.hpp"
#include "../../Storage/Disk/DiskImage/Formats/IPF.hpp"
#include "../../Storage/Disk/DiskImage/Formats/IMD.hpp"
#include "../../Storage/Disk/DiskImage/Formats/MacintoshIMG.hpp"
#include "../../Storage/Disk/DiskImage/Formats/MSA.hpp"
#include "../../Storage/Disk/DiskImage/Formats/NIB.hpp"
@ -182,6 +183,7 @@ static Media GetMediaAndPlatforms(const std::string &file_name, TargetPlatform::
// HFE (TODO: switch to AllDisk once the MSX stops being so greedy)
Format("ima", result.disks, Disk::DiskImageHolder<Storage::Disk::FAT12>, TargetPlatform::PCCompatible) // IMG (MS-DOS style)
Format("image", result.disks, Disk::DiskImageHolder<Storage::Disk::MacintoshIMG>, TargetPlatform::Macintosh) // IMG (DiskCopy 4.2)
Format("imd", result.disks, Disk::DiskImageHolder<Storage::Disk::IMD>, TargetPlatform::PCCompatible) // IMD
Format("img", result.disks, Disk::DiskImageHolder<Storage::Disk::MacintoshIMG>, TargetPlatform::Macintosh) // IMG (DiskCopy 4.2)
// Treat PC booter as a potential backup only if this doesn't parse as a FAT12.

8
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
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@ -37,6 +37,8 @@
42A5E8532ABBE16F00A0DD5D /* lax_test.bin in Resources */ = {isa = PBXBuildFile; fileRef = 42A5E8422ABBE16F00A0DD5D /* lax_test.bin */; };
42A5E8542ABBE16F00A0DD5D /* branch_backwards_test.bin in Resources */ = {isa = PBXBuildFile; fileRef = 42A5E8432ABBE16F00A0DD5D /* branch_backwards_test.bin */; };
42E5C3932AC46A7700DA093D /* Carbon.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 42E5C3922AC46A7700DA093D /* Carbon.framework */; };
42EB81282B23AAC300429AF4 /* IMD.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 42EB81262B23AAC300429AF4 /* IMD.cpp */; };
42EB81292B23AAC300429AF4 /* IMD.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 42EB81262B23AAC300429AF4 /* IMD.cpp */; };
4B018B89211930DE002A3937 /* 65C02_extended_opcodes_test.bin in Resources */ = {isa = PBXBuildFile; fileRef = 4B018B88211930DE002A3937 /* 65C02_extended_opcodes_test.bin */; };
4B01A6881F22F0DB001FD6E3 /* Z80MemptrTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4B01A6871F22F0DB001FD6E3 /* Z80MemptrTests.swift */; };
4B0333AF2094081A0050B93D /* AppleDSK.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B0333AD2094081A0050B93D /* AppleDSK.cpp */; };
@ -1195,6 +1197,8 @@
42AD55312A0C4D5000ACE410 /* 68000Implementation.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = 68000Implementation.hpp; sourceTree = "<group>"; };
42E5C3922AC46A7700DA093D /* Carbon.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Carbon.framework; path = System/Library/Frameworks/Carbon.framework; sourceTree = SDKROOT; };
42EB81252B21788200429AF4 /* RTC.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = RTC.hpp; sourceTree = "<group>"; };
42EB81262B23AAC300429AF4 /* IMD.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = IMD.cpp; sourceTree = "<group>"; };
42EB81272B23AAC300429AF4 /* IMD.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = IMD.hpp; sourceTree = "<group>"; };
4B018B88211930DE002A3937 /* 65C02_extended_opcodes_test.bin */ = {isa = PBXFileReference; lastKnownFileType = archive.macbinary; name = 65C02_extended_opcodes_test.bin; path = "Klaus Dormann/65C02_extended_opcodes_test.bin"; sourceTree = "<group>"; };
4B01A6871F22F0DB001FD6E3 /* Z80MemptrTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Z80MemptrTests.swift; sourceTree = "<group>"; };
4B0333AD2094081A0050B93D /* AppleDSK.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = AppleDSK.cpp; sourceTree = "<group>"; };
@ -3064,6 +3068,7 @@
4BEBFB4B2002C4BF000708CC /* FAT12.cpp */,
4B4518931F75FD1B00926311 /* G64.cpp */,
4B4518951F75FD1B00926311 /* HFE.cpp */,
42EB81262B23AAC300429AF4 /* IMD.cpp */,
4B5B372F2777C7FC0047F238 /* IPF.cpp */,
4BB4BFAE22A42F290069048D /* MacintoshIMG.cpp */,
4B58601C1F806AB200AEE2E3 /* MFMSectorDump.cpp */,
@ -3084,6 +3089,7 @@
4BEBFB4C2002C4BF000708CC /* FAT12.hpp */,
4B4518941F75FD1B00926311 /* G64.hpp */,
4B4518961F75FD1B00926311 /* HFE.hpp */,
42EB81272B23AAC300429AF4 /* IMD.hpp */,
4B5B37302777C7FC0047F238 /* IPF.hpp */,
4BB4BFAF22A42F290069048D /* MacintoshIMG.hpp */,
4B58601D1F806AB200AEE2E3 /* MFMSectorDump.hpp */,
@ -5959,6 +5965,7 @@
4B051C912669C90B00CA44E8 /* ROMCatalogue.cpp in Sources */,
4B055AB91FAE86170060FFFF /* Acorn.cpp in Sources */,
4B302185208A550100773308 /* DiskII.cpp in Sources */,
42EB81292B23AAC300429AF4 /* IMD.cpp in Sources */,
4B051CB1267C1CA200CA44E8 /* Keyboard.cpp in Sources */,
4B0F1BB32602645900B85C66 /* StaticAnalyser.cpp in Sources */,
4B055A931FAE85B50060FFFF /* BinaryDump.cpp in Sources */,
@ -6057,6 +6064,7 @@
4B0333AF2094081A0050B93D /* AppleDSK.cpp in Sources */,
4B894518201967B4007DE474 /* ConfidenceCounter.cpp in Sources */,
4BCE005A227CFFCA000CA200 /* Macintosh.cpp in Sources */,
42EB81282B23AAC300429AF4 /* IMD.cpp in Sources */,
4B6AAEA4230E3E1D0078E864 /* MassStorageDevice.cpp in Sources */,
4B89452E201967B4007DE474 /* StaticAnalyser.cpp in Sources */,
4BC890D3230F86020025A55A /* DirectAccessDevice.cpp in Sources */,

20
OSBindings/Mac/Clock Signal/Info.plist
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@ -691,6 +691,26 @@
<key>NSDocumentClass</key>
<string>$(PRODUCT_MODULE_NAME).MachineDocument</string>
</dict>
<dict>
<key>CFBundleTypeExtensions</key>
<array>
<string>imd</string>
</array>
<key>CFBundleTypeName</key>
<string>IMD disk image</string>
<key>CFBundleTypeOSTypes</key>
<array>
<string>????</string>
</array>
<key>CFBundleTypeRole</key>
<string>Viewer</string>
<key>LSHandlerRank</key>
<string>Owner</string>
<key>LSTypeIsPackage</key>
<false/>
<key>NSDocumentClass</key>
<string>$(PRODUCT_MODULE_NAME).MachineDocument</string>
</dict>
<dict>
<key>CFBundleTypeExtensions</key>
<array>

7
Storage/Disk/DiskImage/Formats/CPCDSK.hpp
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@ -24,19 +24,18 @@ namespace Storage::Disk {
class CPCDSK: public DiskImage {
public:
/*!
Construct an @c AcornADF containing content from the file with name @c file_name.
Construct a @c CPCDSK containing content from the file with name @c file_name.
@throws Storage::FileHolder::Error::CantOpen if this file can't be opened.
@throws Error::InvalidFormat if the file doesn't appear to contain an Acorn .ADF format image.
*/
CPCDSK(const std::string &file_name);
// implemented to satisfy @c Disk
// DiskImage interface.
HeadPosition get_maximum_head_position() final;
int get_head_count() final;
bool get_is_read_only() final;
void set_tracks(const std::map<Track::Address, std::shared_ptr<Track>> &tracks) final;
void set_tracks(const std::map<::Storage::Disk::Track::Address, std::shared_ptr<::Storage::Disk::Track>> &tracks) final;
std::shared_ptr<::Storage::Disk::Track> get_track_at_position(::Storage::Disk::Track::Address address) final;
private:

163
Storage/Disk/DiskImage/Formats/IMD.cpp Normal file
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@ -0,0 +1,163 @@
//
// IMD.cpp
// Clock Signal
//
// Created by Thomas Harte on 08/12/2023.
// Copyright © 2023 Thomas Harte. All rights reserved.
//
#include "IMD.hpp"
#include "../../Encodings/MFM/Constants.hpp"
#include "../../Encodings/MFM/Encoder.hpp"
#include "../../Encodings/MFM/SegmentParser.hpp"
#include "../../Track/TrackSerialiser.hpp"
#include <algorithm>
using namespace Storage::Disk;
// Documentation source: https://oldcomputers-ddns.org/public/pub/manuals/imd.pdf
IMD::IMD(const std::string &file_name) : file_(file_name) {
// Check for signature.
if(!file_.check_signature("IMD")) {
throw Error::InvalidFormat;
}
// Skip rest of ASCII.
while(file_.get8() != 0x1a);
// Build track map.
while(true) {
const auto location = file_.tell();
// Skip mode.
file_.seek(1, SEEK_CUR);
// Grab relevant fields.
const uint8_t cylinder = file_.get8();
const uint8_t head = file_.get8();
const uint8_t sector_count = file_.get8();
const uint8_t sector_size = file_.get8();
if(file_.eof()) {
break;
}
cylinders_ = std::max(cylinder, cylinders_);
heads_ = std::max(uint8_t(head & 1), heads_);
// Update head and cylinder extents, record sector location for later.
track_locations_.emplace(
Storage::Disk::Track::Address(head & 1, HeadPosition(cylinder)),
location);
// Skip sector numbers.
file_.seek(sector_count, SEEK_CUR);
// Skip cylinder map.
if(head & 0x80) {
file_.seek(sector_count, SEEK_CUR);
}
// Skip head map.
if(head & 0x40) {
file_.seek(sector_count, SEEK_CUR);
}
// Skip sectors.
for(int c = 0; c < sector_count; c++) {
const uint8_t type = file_.get8();
switch(type) {
case 0x00: break; // Sector couldn't be read.
// Types with all sector data present.
case 0x01: case 0x03: case 0x05: case 0x07:
file_.seek(128 << sector_size, SEEK_CUR);
break;
// Types with a single byte present.
case 0x02: case 0x04: case 0x06: case 0x08:
file_.seek(1, SEEK_CUR);
break;
}
}
}
// Both heads_ and cylinders_ are now the maximum observed IDs, which
// are one less than the counts.
++ cylinders_;
++ heads_;
}
HeadPosition IMD::get_maximum_head_position() {
return HeadPosition(cylinders_);
}
int IMD::get_head_count() {
return heads_ + 1;
}
std::shared_ptr<::Storage::Disk::Track> IMD::get_track_at_position(::Storage::Disk::Track::Address address) {
auto location = track_locations_.find(address);
if(location == track_locations_.end()) {
return nullptr;
}
// Seek to track, parse fully this time.
file_.seek(location->second, SEEK_SET);
const uint8_t mode = file_.get8();
const uint8_t cylinder = file_.get8();
const uint8_t head = file_.get8();
const uint8_t sector_count = file_.get8();
const uint8_t sector_size = file_.get8();
const std::vector<uint8_t> sector_ids = file_.read(sector_count);
const std::vector<uint8_t> cylinders = (head & 0x80) ? file_.read(sector_count) : std::vector<uint8_t>{};
const std::vector<uint8_t> heads = (head & 0x40) ? file_.read(sector_count) : std::vector<uint8_t>{};
std::vector<Storage::Encodings::MFM::Sector> sectors;
sectors.reserve(sector_count);
for(size_t c = 0; c < sector_count; c++) {
sectors.emplace_back();
Storage::Encodings::MFM::Sector &sector = sectors.back();
// Set up sector address.
sector.address.track = cylinders.empty() ? cylinder : cylinders[c];
sector.address.side = heads.empty() ? head & 1 : heads[c];
sector.address.sector = sector_ids[c];
sector.size = sector_size;
const auto byte_size = size_t(128 << sector_size);
uint8_t type = file_.get8();
// Type 0: sector was present, but couldn't be read.
// Since body CRC errors are a separate item, just don't include a body at all.
if(!type) {
continue;
}
// Decrement type to turn it into a bit field:
//
// b0 => is compressed within disk image;
// b1 => had deleted address mark;
// b2 => had data CRC error.
--type;
sector.is_deleted = type & 2;
sector.has_data_crc_error = type & 4;
if(type & 1) {
sector.samples.emplace_back(byte_size, file_.get8());
} else {
sector.samples.push_back(file_.read(byte_size));
}
}
// Mode also indicates data density, but I don't have a good strategy for reconciling that if
// it were to disagree with the density implied by the quantity of sectors. So a broad 'is it MFM' test is
// applied only.
return (mode >= 3) ?
Storage::Encodings::MFM::GetMFMTrackWithSectors(sectors) :
Storage::Encodings::MFM::GetFMTrackWithSectors(sectors);
}

45
Storage/Disk/DiskImage/Formats/IMD.hpp Normal file
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@ -0,0 +1,45 @@
//
// IMD.hpp
// Clock Signal
//
// Created by Thomas Harte on 08/12/2023.
// Copyright © 2023 Thomas Harte. All rights reserved.
//
#ifndef IMD_hpp
#define IMD_hpp
#include "../DiskImage.hpp"
#include "../../../FileHolder.hpp"
namespace Storage::Disk {
/*!
Provides an @c DiskImage containing an IMD image, which is a collection of arbitrarily-numbered FM or MFM
sectors collected by track.
*/
class IMD: public DiskImage {
public:
/*!
Construct an @c IMD containing content from the file with name @c file_name.
@throws Storage::FileHolder::Error::CantOpen if this file can't be opened.
@throws Error::InvalidFormat if the file doesn't appear to contain an Acorn .ADF format image.
*/
IMD(const std::string &file_name);
// DiskImage interface.
HeadPosition get_maximum_head_position() final;
int get_head_count() final;
std::shared_ptr<::Storage::Disk::Track> get_track_at_position(::Storage::Disk::Track::Address address) final;
private:
FileHolder file_;
std::map<Storage::Disk::Track::Address, long> track_locations_;
uint8_t cylinders_ = 0, heads_ = 0;
};
}
#endif /* IMD_hpp */