OXYGENHUB
◆ main openmsx / src / fdc / DiskFactory.cc
3.2 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#include "DiskFactory.hh"
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#include "DMKDiskImage.hh"
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#include "DSKDiskImage.hh"
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#include "DirAsDSK.hh"
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#include "DiskPartition.hh"
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#include "RamDSKDiskImage.hh"
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#include "XSADiskImage.hh"
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#include "File.hh"
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#include "FileContext.hh"
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#include "MSXException.hh"
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#include "Reactor.hh"
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#include "StringOp.hh"
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#include <memory>
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namespace openmsx {
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DiskFactory::DiskFactory(Reactor& reactor_)
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	: reactor(reactor_)
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	, syncDirAsDSKSetting(
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		reactor.getCommandController(), "DirAsDSKmode",
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		"type of synchronisation between host directory and dir-as-dsk disk image",
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		DirAsDSK::SyncMode::FULL, EnumSetting<DirAsDSK::SyncMode>::Map{
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			{"read_only", DirAsDSK::SyncMode::READONLY},
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			{"full",      DirAsDSK::SyncMode::FULL}})
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	, bootSectorSetting(
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		reactor.getCommandController(), "bootsector",
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		"boot sector type for dir-as-dsk",
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		DirAsDSK::BootSectorType::DOS2, EnumSetting<DirAsDSK::BootSectorType>::Map{
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			{"DOS1", DirAsDSK::BootSectorType::DOS1},
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			{"DOS2", DirAsDSK::BootSectorType::DOS2}})
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{
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}
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std::unique_ptr<Disk> DiskFactory::createDisk(
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	const std::string& diskImage, DiskChanger& diskChanger)
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{
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	if (diskImage == "ramdsk") {
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		return std::make_unique<RamDSKDiskImage>();
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	}
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	Filename filename(diskImage, userFileContext());
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	try {
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		// First try DirAsDSK
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		return std::make_unique<DirAsDSK>(
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			diskChanger,
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			reactor.getCliComm(),
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			filename,
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			syncDirAsDSKSetting.getEnum(),
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			bootSectorSetting.getEnum());
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	} catch (MSXException&) {
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		// DirAsDSK didn't work, no problem
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	}
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	try {
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		auto file = std::make_shared<File>(filename.getResolved(), File::OpenMode::PRE_CACHE);
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		try {
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			// first try XSA
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			return std::make_unique<XSADiskImage>(filename, *file);
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		} catch (MSXException&) {
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			// XSA didn't work, still no problem
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		}
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		try {
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			// next try dmk
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			file->seek(0);
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			return std::make_unique<DMKDiskImage>(filename, file);
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		} catch (MSXException& /*e*/) {
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			// DMK didn't work, still no problem
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		}
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		// next try normal DSK
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		return std::make_unique<DSKDiskImage>(filename, std::move(file));
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	} catch (MSXException& e) {
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		// File could not be opened or (very rare) something is wrong
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		// with the DSK image. Try to interpret the filename as
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		//    <filename>:<partition-number>
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		// Try this last because the ':' character could be
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		// part of the filename itself. So only try this if
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		// the name could not be interpreted as a valid
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		// filename.
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		auto pos = diskImage.find_last_of(':');
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		if (pos == std::string::npos) {
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			// does not contain ':', throw previous exception
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			throw;
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		}
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		std::shared_ptr<SectorAccessibleDisk> wholeDisk;
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		try {
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			Filename filename2(diskImage.substr(0, pos));
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			wholeDisk = std::make_shared<DSKDiskImage>(filename2);
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		} catch (MSXException&) {
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			// If this fails we still prefer to show the
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			// previous error message, because it's most
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			// likely more descriptive.
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			throw e;
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		}
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		unsigned num = [&] {
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			auto n = StringOp::stringToBase<10, unsigned>(std::string_view(diskImage).substr(pos + 1));
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			if (!n) {
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				// not a valid partition number, throw previous exception
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				throw e;
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			}
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			return *n;
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		}();
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		SectorAccessibleDisk& disk = *wholeDisk;
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		return std::make_unique<DiskPartition>(disk, num, std::move(wholeDisk));
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	}
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}
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} // namespace openmsx