(svn r17298) -Fix [FS#3153]: reloading an AI started a new AI in the first available company slot causing other AIs to be started

src/ai/ai_gui.cpp

@@ -858,7 +858,7 @@ struct AIDebugWindow : public Window {
 		if (widget == AID_WIDGET_RELOAD_TOGGLE && !this->IsWidgetDisabled(widget)) {
 			/* First kill the company of the AI, then start a new one. This should start the current AI again */
 			DoCommandP(0, 2, ai_debug_company, CMD_COMPANY_CTRL);
-			DoCommandP(0, 1, 0, CMD_COMPANY_CTRL);
+			DoCommandP(0, 1, ai_debug_company, CMD_COMPANY_CTRL);
 		}
 	}
 

src/company_cmd.cpp

@@ -413,16 +413,23 @@ void ResetCompanyLivery(Company *c)
  * Create a new company and sets all company variables default values
  *
  * @param is_ai is a ai company?
+ * @param company CompanyID to use for the new company
  * @return the company struct
  */
-Company *DoStartupNewCompany(bool is_ai)
+Company *DoStartupNewCompany(bool is_ai, CompanyID company = INVALID_COMPANY)
 {
 	if (!Company::CanAllocateItem()) return NULL;
 
 	/* we have to generate colour before this company is valid */
 	Colours colour = GenerateCompanyColour();
 
-	Company *c = new Company(STR_SV_UNNAMED, is_ai);
+	Company *c;
+	if (company == INVALID_COMPANY) {
+		c = new Company(STR_SV_UNNAMED, is_ai);
+	} else {
+		if (Company::IsValidID(company)) return NULL;
+		c = new (company) Company(STR_SV_UNNAMED, is_ai);
+	}
 
 	c->colour = colour;
 
@@ -475,7 +482,7 @@ static void MaybeStartNewCompany()
 	if (n < (uint)_settings_game.difficulty.max_no_competitors) {
 		/* Send a command to all clients to start up a new AI.
 		 * Works fine for Multiplayer and Singleplayer */
-		DoCommandP(0, 1, 0, CMD_COMPANY_CTRL);
+		DoCommandP(0, 1, INVALID_COMPANY, CMD_COMPANY_CTRL);
 	}
 }
 
@@ -597,6 +604,7 @@ void CompanyNewsInformation::FillData(const Company *c, const Company *other)
  * - p1 = 3 - merge two companies together. merge #1 with #2. Identified by p2
  * @param p2 various functionality, dictated by p1
  * - p1 = 0 - ClientID of the newly created client
+ * - p1 = 1 - CompanyID to start AI (INVALID_COMPANY for first available)
  * - p1 = 2 - CompanyID of the that is getting deleted
  * - p1 = 3 - #1 p2 = (bit  0-15) - company to merge (p2 & 0xFFFF)
  *          - #2 p2 = (bit 16-31) - company to be merged into ((p2>>16)&0xFFFF)
@@ -707,7 +715,8 @@ CommandCost CmdCompanyCtrl(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3
 		case 1: // Make a new AI company
 			if (!(flags & DC_EXEC)) return CommandCost();
 
-			DoStartupNewCompany(true);
+			if (p2 != INVALID_COMPANY && (p2 >= MAX_COMPANIES || Company::IsValidID(p2))) return CMD_ERROR;
+			DoStartupNewCompany(true, (CompanyID)p2);
 			break;
 
 		case 2: { // Delete a company

src/console_cmds.cpp

@@ -1044,7 +1044,7 @@ DEF_CONSOLE_CMD(ConStartAI)
 	}
 
 	/* Start a new AI company */
-	DoCommandP(0, 1, 0, CMD_COMPANY_CTRL);
+	DoCommandP(0, 1, INVALID_COMPANY, CMD_COMPANY_CTRL);
 
 	return true;
 }
@@ -1080,7 +1080,7 @@ DEF_CONSOLE_CMD(ConReloadAI)
 
 	/* First kill the company of the AI, then start a new one. This should start the current AI again */
 	DoCommandP(0, 2, company_id, CMD_COMPANY_CTRL);
-	DoCommandP(0, 1, 0, CMD_COMPANY_CTRL);
+	DoCommandP(0, 1, company_id, CMD_COMPANY_CTRL);
 	IConsolePrint(CC_DEFAULT, "AI reloaded.");
 
 	return true;

src/openttd.cpp

@@ -83,7 +83,7 @@ void ProcessAsyncSaveFinish();
 void CallWindowTickEvent();
 
 extern void SetDifficultyLevel(int mode, DifficultySettings *gm_opt);
-extern Company *DoStartupNewCompany(bool is_ai);
+extern Company *DoStartupNewCompany(bool is_ai, CompanyID company = INVALID_COMPANY);
 extern void ShowOSErrorBox(const char *buf, bool system);
 extern void InitializeRailGUI();
 

src/saveload/afterload.cpp

@@ -49,7 +49,7 @@
 #include <signal.h>
 
 extern StringID _switch_mode_errorstr;
-extern Company *DoStartupNewCompany(bool is_ai);
+extern Company *DoStartupNewCompany(bool is_ai, CompanyID company = INVALID_COMPANY);
 extern void InitializeRailGUI();
 
 /**