truelight@2395: /* $Id$ */
truelight@2395: 
truelight@2395: #include "../stdafx.h"
truelight@2395: #include "../openttd.h"
truelight@2395: #include "../variables.h"
truelight@2395: #include "../command.h"
rubidium@5720: #include "../network/network.h"
rubidium@5838: #include "../helpers.hpp"
truelight@2395: #include "ai.h"
tron@2447: #include "default/default.h"
truelight@2715: 
truelight@2395: /**
truelight@2395:  * Dequeues commands put in the queue via AI_PutCommandInQueue.
truelight@2395:  */
Darkvater@3692: static void AI_DequeueCommands(PlayerID player)
truelight@2395: {
truelight@2395: 	AICommand *com, *entry_com;
truelight@2395: 
truelight@2395: 	entry_com = _ai_player[player].queue;
truelight@2395: 
truelight@2395: 	/* It happens that DoCommandP issues a new DoCommandAI which adds a new command
truelight@2395: 	 *  to this very same queue (don't argue about this, if it currently doesn't
truelight@2395: 	 *  happen I can tell you it will happen with AIScript -- TrueLight). If we
truelight@2395: 	 *  do not make the queue NULL, that commands will be dequeued immediatly.
truelight@2395: 	 *  Therefor we safe the entry-point to entry_com, and make the queue NULL, so
truelight@2395: 	 *  the new queue can be safely built up. */
truelight@2395: 	_ai_player[player].queue = NULL;
truelight@2395: 	_ai_player[player].queue_tail = NULL;
truelight@2395: 
truelight@2395: 	/* Dequeue all commands */
truelight@2395: 	while ((com = entry_com) != NULL) {
truelight@2395: 		_current_player = player;
truelight@2395: 
truelight@2738: 		_cmd_text = com->text;
tron@3946: 		DoCommandP(com->tile, com->p1, com->p2, com->callback, com->procc);
truelight@2395: 
truelight@2395: 		/* Free item */
truelight@2395: 		entry_com = com->next;
tron@3886: 		free(com->text);
truelight@2395: 		free(com);
truelight@2395: 	}
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * Needed for SP; we need to delay DoCommand with 1 tick, because else events
truelight@2395:  *  will make infinite loops (AIScript).
truelight@2395:  */
tron@3946: static void AI_PutCommandInQueue(PlayerID player, TileIndex tile, uint32 p1, uint32 p2, uint procc, CommandCallback* callback)
truelight@2395: {
truelight@2395: 	AICommand *com;
truelight@2395: 
truelight@2395: 	if (_ai_player[player].queue_tail == NULL) {
truelight@2395: 		/* There is no item in the queue yet, create the queue */
KUDr@5860: 		_ai_player[player].queue = MallocT<AICommand>(1);
truelight@2395: 		_ai_player[player].queue_tail = _ai_player[player].queue;
truelight@2395: 	} else {
truelight@2395: 		/* Add an item at the end */
KUDr@5860: 		_ai_player[player].queue_tail->next = MallocT<AICommand>(1);
truelight@2395: 		_ai_player[player].queue_tail = _ai_player[player].queue_tail->next;
truelight@2395: 	}
truelight@2395: 
truelight@2395: 	/* This is our new item */
truelight@2395: 	com = _ai_player[player].queue_tail;
truelight@2395: 
truelight@2395: 	/* Assign the info */
truelight@2395: 	com->tile  = tile;
truelight@2395: 	com->p1    = p1;
truelight@2395: 	com->p2    = p2;
truelight@2395: 	com->procc = procc;
tron@3946: 	com->callback = callback;
truelight@2395: 	com->next  = NULL;
truelight@2738: 	com->text  = NULL;
truelight@2395: 
truelight@2738: 	/* Copy the cmd_text, if needed */
truelight@2738: 	if (_cmd_text != NULL) {
truelight@2738: 		com->text = strdup(_cmd_text);
truelight@2738: 		_cmd_text = NULL;
truelight@2738: 	}
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * Executes a raw DoCommand for the AI.
truelight@2395:  */
tron@3946: int32 AI_DoCommandCc(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc, CommandCallback* callback)
truelight@2395: {
tron@2551: 	PlayerID old_lp;
truelight@2395: 	int32 res = 0;
tron@3950: 	const char* tmp_cmdtext;
truelight@2395: 
truelight@2395: 	/* If you enable DC_EXEC with DC_QUERY_COST you are a really strange
truelight@2395: 	 *   person.. should we check for those funny jokes?
truelight@2395: 	 */
truelight@2395: 
tron@3950: 	/* The test already resets _cmd_text, so backup the pointer */
tron@3950: 	tmp_cmdtext = _cmd_text;
truelight@2738: 
truelight@2395: 	/* First, do a test-run to see if we can do this */
tron@3491: 	res = DoCommand(tile, p1, p2, flags & ~DC_EXEC, procc);
truelight@2395: 	/* The command failed, or you didn't want to execute, or you are quering, return */
tron@4000: 	if (CmdFailed(res) || !(flags & DC_EXEC) || (flags & DC_QUERY_COST)) {
truelight@2395: 		return res;
truelight@2738: 	}
truelight@2738: 
tron@3950: 	/* Restore _cmd_text */
tron@3950: 	_cmd_text = tmp_cmdtext;
truelight@2395: 
truelight@2395: 	/* If we did a DC_EXEC, and the command did not return an error, execute it
tron@4000: 	 * over the network */
tron@4000: 	if (flags & DC_AUTO)     procc |= CMD_AUTO;
tron@4000: 	if (flags & DC_NO_WATER) procc |= CMD_NO_WATER;
truelight@2395: 
truelight@2395: 	/* NetworkSend_Command needs _local_player to be set correctly, so
tron@4000: 	 * adjust it, and put it back right after the function */
truelight@2395: 	old_lp = _local_player;
truelight@2395: 	_local_player = _current_player;
truelight@2395: 
bjarni@2727: #ifdef ENABLE_NETWORK
truelight@2395: 	/* Send the command */
tron@4000: 	if (_networking) {
truelight@2395: 		/* Network is easy, send it to his handler */
tron@3946: 		NetworkSend_Command(tile, p1, p2, procc, callback);
tron@4000: 	} else {
tron@4000: #else
tron@4000: 	{
bjarni@2727: #endif
truelight@2395: 		/* If we execute BuildCommands directly in SP, we have a big problem with events
truelight@2395: 		 *  so we need to delay is for 1 tick */
tron@3946: 		AI_PutCommandInQueue(_current_player, tile, p1, p2, procc, callback);
tron@4000: 	}
truelight@2395: 
truelight@2395: 	/* Set _local_player back */
truelight@2395: 	_local_player = old_lp;
truelight@2395: 
truelight@2395: 	return res;
truelight@2395: }
truelight@2395: 
tron@3946: 
tron@3946: int32 AI_DoCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc)
tron@3946: {
tron@3946: 	return AI_DoCommandCc(tile, p1, p2, flags, procc, NULL);
tron@3946: }
tron@3946: 
tron@3946: 
truelight@2759: /**
truelight@2395:  * Run 1 tick of the AI. Don't overdo it, keep it realistic.
truelight@2395:  */
tron@2551: static void AI_RunTick(PlayerID player)
truelight@2395: {
tron@2767: 	extern void AiNewDoGameLoop(Player *p);
tron@2767: 
tron@2767: 	Player *p = GetPlayer(player);
truelight@2395: 	_current_player = player;
truelight@2395: 
tron@2767: 	if (_patches.ainew_active) {
tron@2767: 		AiNewDoGameLoop(p);
tron@2767: 	} else {
tron@2767: 		/* Enable all kind of cheats the old AI needs in order to operate correctly... */
tron@2767: 		_is_old_ai_player = true;
tron@2767: 		AiDoGameLoop(p);
tron@2767: 		_is_old_ai_player = false;
truelight@2422: 	}
truelight@2395: }
truelight@2395: 
truelight@2395: 
truelight@2395: /**
truelight@2395:  * The gameloop for AIs.
truelight@2395:  *  Handles one tick for all the AIs.
truelight@2395:  */
truelight@2395: void AI_RunGameLoop(void)
truelight@2395: {
truelight@2395: 	/* Don't do anything if ai is disabled */
tron@2639: 	if (!_ai.enabled) return;
truelight@2395: 
Darkvater@5332: 	/* Don't do anything if we are a network-client, or the AI has been disabled */
Darkvater@5332: 	if (_networking && (!_network_server || !_patches.ai_in_multiplayer)) return;
truelight@2682: 
truelight@2395: 	/* New tick */
truelight@2395: 	_ai.tick++;
truelight@2395: 
truelight@2395: 	/* Make sure the AI follows the difficulty rule.. */
tron@2446: 	assert(_opt.diff.competitor_speed <= 4);
tron@4000: 	if ((_ai.tick & ((1 << (4 - _opt.diff.competitor_speed)) - 1)) != 0) return;
truelight@2395: 
truelight@2395: 	/* Check for AI-client (so joining a network with an AI) */
Darkvater@4854: 	if (!_networking || _network_server) {
truelight@2395: 		/* Check if we want to run AIs (server or SP only) */
tron@4000: 		const Player* p;
truelight@2395: 
truelight@2395: 		FOR_ALL_PLAYERS(p) {
tron@2767: 			if (p->is_active && p->is_ai) {
tron@2767: 				/* This should always be true, else something went wrong... */
tron@2767: 				assert(_ai_player[p->index].active);
tron@2767: 
truelight@2395: 				/* Run the script */
truelight@2395: 				AI_DequeueCommands(p->index);
truelight@2395: 				AI_RunTick(p->index);
truelight@2395: 			}
truelight@2395: 		}
truelight@2395: 	}
truelight@2395: 
truelight@2395: 	_current_player = OWNER_NONE;
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * A new AI sees the day of light. You can do here what ever you think is needed.
truelight@2395:  */
tron@2551: void AI_StartNewAI(PlayerID player)
truelight@2395: {
Darkvater@4850: 	assert(IsValidPlayer(player));
truelight@2702: 
truelight@2395: 	/* Called if a new AI is booted */
truelight@2395: 	_ai_player[player].active = true;
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * This AI player died. Give it some chance to make a final puf.
truelight@2395:  */
tron@2551: void AI_PlayerDied(PlayerID player)
truelight@2395: {
truelight@2395: 	/* Called if this AI died */
truelight@2395: 	_ai_player[player].active = false;
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * Initialize some AI-related stuff.
truelight@2395:  */
truelight@2395: void AI_Initialize(void)
truelight@2395: {
truelight@2706: 	/* First, make sure all AIs are DEAD! */
truelight@2706: 	AI_Uninitialize();
truelight@2706: 
truelight@2395: 	memset(&_ai, 0, sizeof(_ai));
tron@2767: 	memset(&_ai_player, 0, sizeof(_ai_player));
truelight@2395: 
truelight@2395: 	_ai.enabled = true;
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * Deinitializer for AI-related stuff.
truelight@2395:  */
truelight@2395: void AI_Uninitialize(void)
truelight@2395: {
tron@4000: 	const Player* p;
truelight@2395: 
truelight@2395: 	FOR_ALL_PLAYERS(p) {
tron@2767: 		if (p->is_active && p->is_ai) AI_PlayerDied(p->index);
truelight@2395: 	}
truelight@2395: }