C++ device_t::subtag方法代码示例

inline void map_handler_data::set_tag(const device_t &device, const char *tag)
{
	if (strcmp(tag, DEVICE_SELF) == 0)
		m_tag = device.tag();
	else if (strcmp(tag, DEVICE_SELF_OWNER) == 0)
	{
		assert(device.owner() != NULL);
		m_tag = device.owner()->tag();
	}
	else
		m_tag = device.subtag(m_derived_tag, tag);
}

void load_software_part_region(device_t &device, software_list_device &swlist, const char *swname, const rom_entry *start_region)
{
	astring locationtag(swlist.list_name()), breakstr("%");
	romload_private *romdata = device.machine().romload_data;
	const rom_entry *region;
	astring regiontag;

	romdata->errorstring.reset();
	romdata->softwarningstring.reset();

	romdata->romstotal = 0;
	romdata->romstotalsize = 0;
	romdata->romsloadedsize = 0;

	software_info *swinfo = swlist.find(swname);
	if (swinfo != NULL)
	{
		UINT32 supported = swinfo->supported();
		if (supported == SOFTWARE_SUPPORTED_PARTIAL)
		{
			romdata->errorstring.catprintf("WARNING: support for software %s (in list %s) is only partial\n", swname, swlist.list_name());
			romdata->softwarningstring.catprintf("Support for software %s (in list %s) is only partial\n", swname, swlist.list_name());
		}
		if (supported == SOFTWARE_SUPPORTED_NO)
		{
			romdata->errorstring.catprintf("WARNING: support for software %s (in list %s) is only preliminary\n", swname, swlist.list_name());
			romdata->softwarningstring.catprintf("Support for software %s (in list %s) is only preliminary\n", swname, swlist.list_name());
		}

		// attempt reading up the chain through the parents and create a locationtag astring in the format
		// " swlist % clonename % parentname "
		// open_rom_file contains the code to split the elements and to create paths to load from

		locationtag.cat(breakstr);

		while (swinfo != NULL)
		{
			locationtag.cat(swinfo->shortname()).cat(breakstr);
			const char *parentname = swinfo->parentname();
			swinfo = (parentname != NULL) ? swlist.find(parentname) : NULL;
		}
		// strip the final '%'
		locationtag.del(locationtag.len() - 1, 1);
	}


	/* loop until we hit the end */
	for (region = start_region; region != NULL; region = rom_next_region(region))
	{
		UINT32 regionlength = ROMREGION_GETLENGTH(region);

		device.subtag(regiontag, ROMREGION_GETTAG(region));
		LOG(("Processing region \"%s\" (length=%X)\n", regiontag.cstr(), regionlength));

		/* the first entry must be a region */
		assert(ROMENTRY_ISREGION(region));

		/* if this is a device region, override with the device width and endianness */
		endianness_t endianness = ROMREGION_ISBIGENDIAN(region) ? ENDIANNESS_BIG : ENDIANNESS_LITTLE;
		UINT8 width = ROMREGION_GETWIDTH(region) / 8;
		memory_region *memregion = romdata->machine().root_device().memregion(regiontag);
		if (memregion != NULL)
		{
			if (romdata->machine().device(regiontag) != NULL)
				normalize_flags_for_device(romdata->machine(), regiontag, width, endianness);

			/* clear old region (todo: should be moved to an image unload function) */
			romdata->machine().memory().region_free(memregion->name());
		}

		/* remember the base and length */
		romdata->region = romdata->machine().memory().region_alloc(regiontag, regionlength, width, endianness);
		LOG(("Allocated %X bytes @ %p\n", romdata->region->bytes(), romdata->region->base()));

		/* clear the region if it's requested */
		if (ROMREGION_ISERASE(region))
			memset(romdata->region->base(), ROMREGION_GETERASEVAL(region), romdata->region->bytes());

		/* or if it's sufficiently small (<= 4MB) */
		else if (romdata->region->bytes() <= 0x400000)
			memset(romdata->region->base(), 0, romdata->region->bytes());

#ifdef MAME_DEBUG
		/* if we're debugging, fill region with random data to catch errors */
		else
			fill_random(romdata->machine(), romdata->region->base(), romdata->region->bytes());
#endif

		/* update total number of roms */
		for (const rom_entry *rom = rom_first_file(region); rom != NULL; rom = rom_next_file(rom))
		{
			romdata->romstotal++;
			romdata->romstotalsize += rom_file_size(rom);
		}

		/* now process the entries in the region */
		if (ROMREGION_ISROMDATA(region))
			process_rom_entries(romdata, locationtag, region, region + 1, &device, TRUE);
		else if (ROMREGION_ISDISKDATA(region))
			process_disk_entries(romdata, core_strdup(regiontag.cstr()), region, region + 1, locationtag);
//.........这里部分代码省略.........

std::string rom_parameter_name(const device_t &device, const rom_entry *romp)
{
	return device.subtag(romp->_name);
}

std::string rom_region_name(const device_t &device, const rom_entry *romp)
{
	return device.subtag(ROM_GETNAME(romp));
}

void address_map::uplift_submaps(running_machine &machine, device_t &device, device_t &owner, endianness_t endian)
{
	address_map_entry *prev = 0;
	address_map_entry *entry = m_entrylist.first();
	while (entry)
	{
		if (entry->m_read.m_type == AMH_DEVICE_SUBMAP)
		{
			std::string tag = owner.subtag(entry->m_read.m_tag);
			device_t *mapdevice = machine.device(tag.c_str());
			if (mapdevice == NULL) {
				throw emu_fatalerror("Attempted to submap a non-existent device '%s' in space %d of device '%s'\n", tag.c_str(), m_spacenum, device.basetag());
			}
			// Grab the submap
			address_map submap(*mapdevice, entry);

			// Recursively uplift it if needed
			submap.uplift_submaps(machine, device, *mapdevice, endian);

			// Compute the unit repartition characteristics
			int entry_bits = entry->m_submap_bits;
			if (!entry_bits)
				entry_bits = m_databits;

			if (submap.m_databits != entry_bits)
				throw emu_fatalerror("AM_DEVICE wants a %d bits large address map and got a %d bits large one instead.\n", entry_bits, submap.m_databits);

			int entry_bytes = entry_bits / 8;
			int databytes = m_databits / 8;

			offs_t mirror_address_mask = (databytes - 1) & ~(entry_bytes - 1);

			UINT64 entry_mask = (2ULL << (entry_bits-1)) - 1;

			int slot_offset[8];
			int slot_count = 0;
			int max_slot_count = m_databits / entry_bits;
			int slot_xor_mask = endian == ENDIANNESS_LITTLE ? 0 : max_slot_count - 1;

			UINT64 global_mask = entry->m_read.m_mask;
			// zero means all
			if (!global_mask)
				global_mask = ~global_mask;

			// mask consistency has already been checked in
			// unitmask_is_appropriate, so one bit is enough
			for (int slot=0; slot < max_slot_count; slot++)
				if (global_mask & (1ULL << ((slot ^ slot_xor_mask) * entry_bits)))
					slot_offset[slot_count++] = (slot ^ slot_xor_mask) * entry_bits;

			// Merge in all the map contents in order
			while (submap.m_entrylist.count())
			{
				address_map_entry *subentry = submap.m_entrylist.detach_head();

				// Remap start and end

				unsigned int start_offset = subentry->m_addrstart / entry_bytes;
				unsigned int start_slot = start_offset % slot_count;
				subentry->m_addrstart = entry->m_addrstart + (start_offset / slot_count) * databytes;

				// Drop the entry if it ends up outside the range
				if (subentry->m_addrstart > entry->m_addrend)
				{
					global_free(subentry);
					continue;
				}

				unsigned int end_offset = subentry->m_addrend / entry_bytes;
				unsigned int end_slot = end_offset % slot_count;
				subentry->m_addrend = entry->m_addrstart + (end_offset / slot_count) * databytes + databytes - 1;

				// Clip the entry to the end of the range
				if (subentry->m_addrend > entry->m_addrend || subentry->m_addrend < entry->m_addrstart)
					subentry->m_addrend = entry->m_addrend;

				// Detect special unhandled case (range straddling
				// slots, requiring splitting in multiple entries and
				// unimplemented offset-add subunit handler)
				if (subentry->m_addrstart + databytes - 1 != subentry->m_addrend &&
					(start_slot != 0 || end_slot != slot_count - 1))
					throw emu_fatalerror("uplift_submaps unhandled case: range straddling slots.\n");

				if (entry->m_addrmask || subentry->m_addrmask)
					throw emu_fatalerror("uplift_submaps unhandled case: address masks.\n");

				if (subentry->m_addrmirror & mirror_address_mask)
					throw emu_fatalerror("uplift_submaps unhandled case: address mirror bit within subentry.\n");

				subentry->m_addrmirror |= entry->m_addrmirror;

				// Twiddle the unitmask on the data accessors that need it
				for (int data_entry = 0; data_entry < 3; data_entry++)
				{
					map_handler_data &mdata = (data_entry==0)? subentry->m_read : ((data_entry==1)? subentry->m_write : subentry->m_setoffsethd);

					if (mdata.m_type == AMH_NONE)
						continue;

					if (mdata.m_type != AMH_DEVICE_DELEGATE && mdata.m_type != AMH_NOP)
//.........这里部分代码省略.........