/* 'Action 0xFF' */

static void GRFDataBlock(byte *buf, int len)

{

	if (_grf_data_blocks == 0) {

		grfmsg(2, "GRFDataBlock: unexpected data block, skipping");

		return;

	}

	buf++;

	uint8 name_len = grf_load_byte(&buf);

	const char *name = (const char *)buf;

	buf += name_len + 1;

	grfmsg(2, "GRFDataBlock: block name '%s'...", name);

	_grf_data_blocks--;

	switch (_grf_data_type) {

		case GDT_SOUND: LoadGRFSound(buf, len - name_len - 2); break;

		default: NOT_REACHED(); break;

	}

}

/* Used during safety scan on unsafe actions */

static void GRFUnsafe(byte *buf, int len)

{

	SETBIT(_cur_grfconfig->flags, GCF_UNSAFE);

	/* Skip remainder of GRF */

	_skip_sprites = -1;

}

static void InitializeGRFSpecial()

{

	_ttdpatch_flags[0] =  ((_patches.always_small_airport ? 1 : 0) << 0x0C)  // keepsmallairport

	                   |                                        (1 << 0x0D)  // newairports

	                   |                                        (1 << 0x0E)  // largestations

	                   |           ((_patches.longbridges ? 1 : 0) << 0x0F)  // longbridges

	                   |                                        (0 << 0x10)  // loadtime

	                   |                                        (1 << 0x12)  // presignals

	                   |                                        (1 << 0x13)  // extpresignals

	                   | ((_patches.never_expire_vehicles ? 1 : 0) << 0x16)  // enginespersist

	                   |                                        (1 << 0x1B)  // multihead

	                   |                                        (1 << 0x1D)  // lowmemory

	                   |                                        (1 << 0x1E); // generalfixes

	_ttdpatch_flags[1] =                                        (0 << 0x07)  // moreairports - based on units of noise

	                   |        ((_patches.mammoth_trains ? 1 : 0) << 0x08)  // mammothtrains

	                   |                                        (1 << 0x09)  // trainrefit

	                   |                                        (0 << 0x0B)  // subsidiaries

	                   |       ((_patches.gradual_loading ? 1 : 0) << 0x0C)  // gradualloading

	                   |                                        (1 << 0x12)  // unifiedmaglevmode - set bit 0 mode. Not revelant to OTTD

	                   |                                        (1 << 0x13)  // unifiedmaglevmode - set bit 1 mode

	                   |                                        (1 << 0x14)  // bridgespeedlimits

	                   |                                        (1 << 0x16)  // eternalgame

	                   |                                        (1 << 0x17)  // newtrains

	                   |                                        (1 << 0x18)  // newrvs

	                   |                                        (1 << 0x19)  // newships

	                   |                                        (1 << 0x1A)  // newplanes

	                   |           ((_patches.signal_side ? 1 : 0) << 0x1B)  // signalsontrafficside

	                   |                                        (1 << 0x1C); // electrifiedrailway

	_ttdpatch_flags[2] =                                        (1 << 0x01)  // loadallgraphics - obsolote

	                   |                                        (1 << 0x03)  // semaphores

	                   |                                        (0 << 0x0B)  // enhancedgui

	                   |                                        (0 << 0x0C)  // newagerating

	                   |       ((_patches.build_on_slopes ? 1 : 0) << 0x0D)  // buildonslopes

	                   |         ((_patches.full_load_any ? 1 : 0) << 0x0E)  // fullloadany

	                   |                                        (1 << 0x0F)  // planespeed - TODO depends on patch when implemented

	                   |                                        (0 << 0x10)  // moreindustriesperclimate - obsolete

	                   |                                        (0 << 0x11)  // moretoylandfeatures

	                   |                                        (1 << 0x12)  // newstations

	                   |                                        (0 << 0x13)  // tracktypecostdiff

	                   |                                        (1 << 0x14)  // manualconvert

	                   |       ((_patches.build_on_slopes ? 1 : 0) << 0x15)  // buildoncoasts

	                   |                                        (1 << 0x16)  // canals

	                   |                                        (1 << 0x17)  // newstartyear

	                   |    ((_patches.freight_trains > 1 ? 1 : 0) << 0x18)  // freighttrains

	                   |                                        (1 << 0x19)  // newhouses

	                   |                                        (1 << 0x1A)  // newbridges

	                   |                                        (1 << 0x1B)  // newtownnames

	                   |                                        (0 << 0x1C)  // moreanimations

	                   |    ((_patches.wagon_speed_limits ? 1 : 0) << 0x1D)  // wagonspeedlimits

	                   |                                        (1 << 0x1E)  // newshistory

	                   |                                        (0 << 0x1F); // custombridgeheads

	_ttdpatch_flags[3] =                                        (0 << 0x00)  // newcargodistribution

	                   |                                        (1 << 0x01)  // windowsnap

	                   |                                        (0 << 0x02)  // townbuildnoroad

	                   |                                        (0 << 0x03)  // pathbasedsignalling. To enable if ever pbs is back

	                   |                                        (0 << 0x04)  // aichoosechance

	                   |                                        (1 << 0x05)  // resolutionwidth

	                   |                                        (1 << 0x06)  // resolutionheight

	                   |         ((_patches.improved_load ? 1 : 0) << 0x08)  // fifoloading

	                   |                                        (0 << 0x09)  // townroadbranchprob

	                   |                                        (0 << 0x0A)  // tempsnowline

	                   |                                        (1 << 0x0B)  // newcargo

	                   |                                        (1 << 0x0C)  // enhancemultiplayer

	                   |                                        (1 << 0x0D)  // onewayroads

	                   |   ((_patches.nonuniform_stations ? 1 : 0) << 0x0E)  // irregularstations

	                   |                                        (1 << 0x0F)  // statistics

	                   |                                        (1 << 0x10)  // newsounds

	                   |                                        (1 << 0x11)  // autoreplace

	                   |                                        (1 << 0x12)  // autoslope

	                   |                                        (0 << 0x13)  // followvehicle

	                   |                                        (1 << 0x14)  // trams

	                   |                                        (0 << 0x15)  // enhancetunnels

	                   |                                        (1 << 0x16)  // shortrvs

	                   |                                        (1 << 0x17)  // articulatedrvs

	                   |                                        (1 << 0x1E); // variablerunningcosts

}

static void ResetCustomStations()

{

	for (GRFFile *file = _first_grffile; file != NULL; file = file->next) {

		if (file->stations == NULL) continue;

		for (uint i = 0; i < MAX_STATIONS; i++) {

			if (file->stations[i] == NULL) continue;

			StationSpec *statspec = file->stations[i];

			/* Release renderdata, if it wasn't copied from another custom station spec  */

			if (!statspec->copied_renderdata) {

				for (uint t = 0; t < statspec->tiles; t++) {

					free((void*)statspec->renderdata[t].seq);

				}

				free(statspec->renderdata);

			}

			/* Release platforms and layouts */

			if (!statspec->copied_layouts) {

				for (uint l = 0; l < statspec->lengths; l++) {

					for (uint p = 0; p < statspec->platforms[l]; p++) {

						free(statspec->layouts[l][p]);

					}

					free(statspec->layouts[l]);

				}

				free(statspec->layouts);

				free(statspec->platforms);

			}

			/* Release this station */

			free(statspec);

		}

		/* Free and reset the station data */

		free(file->stations);

		file->stations = NULL;

	}

}

static void ResetCustomHouses()

{

	GRFFile *file;

	uint i;

	for (file = _first_grffile; file != NULL; file = file->next) {

		if (file->housespec == NULL) continue;

		for (i = 0; i < HOUSE_MAX; i++) {

			free(file->housespec[i]);

		}

		free(file->housespec);

		file->housespec = NULL;

	}

}

static void ResetCustomIndustries()

{

	GRFFile *file;

	for (file = _first_grffile; file != NULL; file = file->next) {

		uint i;

		/* We are verifiying both tiles and industries specs loaded from the grf file

		 * First, let's deal with industryspec */

		if (file->industryspec != NULL) {

			for (i = 0; i < NUM_INDUSTRYTYPES; i++) {

				IndustrySpec *ind = file->industryspec[i];

				if (ind != NULL) {

					/* We need to remove the sounds array */

					if (HASBIT(ind->cleanup_flag, CLEAN_RANDOMSOUNDS)) {

						free((void*)ind->random_sounds);

					}

					/* We need to remove the tiles layouts */

					if (HASBIT(ind->cleanup_flag, CLEAN_TILELSAYOUT) && ind->table != NULL) {

						for (int j = 0; j < ind->num_table; j++) {

							/* remove the individual layouts */