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new file 100644
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/* $Id$ */
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#include "../stdafx.h"
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#include "../openttd.h"
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#include "../variables.h"
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#include "../command.h"
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#include "../network/network.h"
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#include "ai.h"
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#include "default/default.h"
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/**
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* Dequeues commands put in the queue via AI_PutCommandInQueue.
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*/
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static void AI_DequeueCommands(PlayerID player)
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{
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AICommand *com, *entry_com;
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entry_com = _ai_player[player].queue;
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/* It happens that DoCommandP issues a new DoCommandAI which adds a new command
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* to this very same queue (don't argue about this, if it currently doesn't
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* happen I can tell you it will happen with AIScript -- TrueLight). If we
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* do not make the queue NULL, that commands will be dequeued immediatly.
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* Therefor we safe the entry-point to entry_com, and make the queue NULL, so
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* the new queue can be safely built up. */
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_ai_player[player].queue = NULL;
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_ai_player[player].queue_tail = NULL;
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/* Dequeue all commands */
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while ((com = entry_com) != NULL) {
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_current_player = player;
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_cmd_text = com->text;
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DoCommandP(com->tile, com->p1, com->p2, com->callback, com->procc);
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/* Free item */
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entry_com = com->next;
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free(com->text);
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free(com);
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}
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}
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/**
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* Needed for SP; we need to delay DoCommand with 1 tick, because else events
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* will make infinite loops (AIScript).
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*/
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static void AI_PutCommandInQueue(PlayerID player, TileIndex tile, uint32 p1, uint32 p2, uint procc, CommandCallback* callback)
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{
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AICommand *com;
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if (_ai_player[player].queue_tail == NULL) {
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/* There is no item in the queue yet, create the queue */
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_ai_player[player].queue = malloc(sizeof(AICommand));
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_ai_player[player].queue_tail = _ai_player[player].queue;
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} else {
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/* Add an item at the end */
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_ai_player[player].queue_tail->next = malloc(sizeof(AICommand));
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_ai_player[player].queue_tail = _ai_player[player].queue_tail->next;
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}
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/* This is our new item */
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com = _ai_player[player].queue_tail;
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/* Assign the info */
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com->tile = tile;
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com->p1 = p1;
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com->p2 = p2;
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com->procc = procc;
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com->callback = callback;
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com->next = NULL;
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com->text = NULL;
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/* Copy the cmd_text, if needed */
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if (_cmd_text != NULL) {
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com->text = strdup(_cmd_text);
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_cmd_text = NULL;
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}
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}
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/**
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* Executes a raw DoCommand for the AI.
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*/
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int32 AI_DoCommandCc(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc, CommandCallback* callback)
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{
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PlayerID old_lp;
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int32 res = 0;
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const char* tmp_cmdtext;
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/* If you enable DC_EXEC with DC_QUERY_COST you are a really strange
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* person.. should we check for those funny jokes?
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*/
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/* The test already resets _cmd_text, so backup the pointer */
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tmp_cmdtext = _cmd_text;
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/* First, do a test-run to see if we can do this */
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res = DoCommand(tile, p1, p2, flags & ~DC_EXEC, procc);
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/* The command failed, or you didn't want to execute, or you are quering, return */
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if (CmdFailed(res) || !(flags & DC_EXEC) || (flags & DC_QUERY_COST)) {
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return res;
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}
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/* Restore _cmd_text */
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_cmd_text = tmp_cmdtext;
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/* If we did a DC_EXEC, and the command did not return an error, execute it
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* over the network */
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if (flags & DC_AUTO) procc |= CMD_AUTO;
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if (flags & DC_NO_WATER) procc |= CMD_NO_WATER;
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/* NetworkSend_Command needs _local_player to be set correctly, so
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* adjust it, and put it back right after the function */
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old_lp = _local_player;
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_local_player = _current_player;
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#ifdef ENABLE_NETWORK
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/* Send the command */
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if (_networking) {
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/* Network is easy, send it to his handler */
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NetworkSend_Command(tile, p1, p2, procc, callback);
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} else {
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#else
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{
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#endif
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/* If we execute BuildCommands directly in SP, we have a big problem with events
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* so we need to delay is for 1 tick */
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AI_PutCommandInQueue(_current_player, tile, p1, p2, procc, callback);
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}
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/* Set _local_player back */
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_local_player = old_lp;
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return res;
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}
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int32 AI_DoCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc)
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{
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return AI_DoCommandCc(tile, p1, p2, flags, procc, NULL);
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}
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/**
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* Run 1 tick of the AI. Don't overdo it, keep it realistic.
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*/
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static void AI_RunTick(PlayerID player)
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{
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extern void AiNewDoGameLoop(Player *p);
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Player *p = GetPlayer(player);
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_current_player = player;
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if (_patches.ainew_active) {
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AiNewDoGameLoop(p);
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} else {
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/* Enable all kind of cheats the old AI needs in order to operate correctly... */
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_is_old_ai_player = true;
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AiDoGameLoop(p);
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_is_old_ai_player = false;
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}
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}
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/**
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* The gameloop for AIs.
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* Handles one tick for all the AIs.
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*/
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void AI_RunGameLoop(void)
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{
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/* Don't do anything if ai is disabled */
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if (!_ai.enabled) return;
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/* Don't do anything if we are a network-client, or the AI has been disabled */
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if (_networking && (!_network_server || !_patches.ai_in_multiplayer)) return;
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/* New tick */
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_ai.tick++;
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/* Make sure the AI follows the difficulty rule.. */
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assert(_opt.diff.competitor_speed <= 4);
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if ((_ai.tick & ((1 << (4 - _opt.diff.competitor_speed)) - 1)) != 0) return;
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/* Check for AI-client (so joining a network with an AI) */
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if (!_networking || _network_server) {
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/* Check if we want to run AIs (server or SP only) */
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const Player* p;
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FOR_ALL_PLAYERS(p) {
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if (p->is_active && p->is_ai) {
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/* This should always be true, else something went wrong... */
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assert(_ai_player[p->index].active);
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/* Run the script */
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AI_DequeueCommands(p->index);
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AI_RunTick(p->index);
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}
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}
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}
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_current_player = OWNER_NONE;
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}
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/**
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* A new AI sees the day of light. You can do here what ever you think is needed.
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*/
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void AI_StartNewAI(PlayerID player)
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{
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assert(IsValidPlayer(player));
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/* Called if a new AI is booted */
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_ai_player[player].active = true;
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}
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/**
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* This AI player died. Give it some chance to make a final puf.
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*/
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void AI_PlayerDied(PlayerID player)
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{
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/* Called if this AI died */
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_ai_player[player].active = false;
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}
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/**
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* Initialize some AI-related stuff.
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*/
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void AI_Initialize(void)
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{
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/* First, make sure all AIs are DEAD! */
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AI_Uninitialize();
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memset(&_ai, 0, sizeof(_ai));
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memset(&_ai_player, 0, sizeof(_ai_player));
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_ai.enabled = true;
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}
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/**
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* Deinitializer for AI-related stuff.
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*/
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void AI_Uninitialize(void)
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{
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const Player* p;
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FOR_ALL_PLAYERS(p) {
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if (p->is_active && p->is_ai) AI_PlayerDied(p->index);
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}
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}
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