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