Change: extend the allowed range for max loan setting (#8386)

regression/regression/result.txt

@@ -594,7 +594,7 @@ ERROR: IsEnd() is invalid as Begin() is never called
   GetBankBalance():                  100000
   GetName():                         (null : 0x00000000)
   GetLoanAmount():                   100000
-  GetMaxLoanAmount():                500000
+  GetMaxLoanAmount():                2000000000
   GetLoanInterval():                 10000
   SetLoanAmount(1):                  false
   SetLoanAmount(100):                false
@@ -606,8 +606,8 @@ ERROR: IsEnd() is invalid as Begin() is never called
   GetBankBalance():                  40000
   GetLoanAmount():                   40000
   SetLoanAmount(10000):              true
-  GetBankBalance():                  500000
-  GetLoanAmount():                   500000
+  GetBankBalance():                  2000000000
+  GetLoanAmount():                   2000000000
   GetCompanyHQ():                    -1
   BuildCompanyHQ():                  true
   GetCompanyHQ():                    33151
@@ -848,7 +848,7 @@ ERROR: IsEnd() is invalid as Begin() is never called
   GetAirportWidth(9):               -1
   GetAirportHeight(9):              -1
   GetAirportCoverageRadius(9):      -1
-  GetBankBalance():     499790
+  GetBankBalance():     1999999790
   GetPrice():           5400
   BuildAirport():       true
   IsHangarTile():       false
@@ -858,11 +858,11 @@ ERROR: IsEnd() is invalid as Begin() is never called
   IsHangarTile():       true
   IsAirportTile():      true
   GetAirportType():     0
-  GetBankBalance():     489890
+  GetBankBalance():     1999989890
   RemoveAirport():      true
   IsHangarTile():       false
   IsAirportTile():      false
-  GetBankBalance():     489626
+  GetBankBalance():     1999989626
   BuildAirport():       true
 
 --Bridge--
@@ -7314,7 +7314,7 @@ ERROR: IsEnd() is invalid as Begin() is never called
   IsBuoyTile():         false
   IsLockTile():         false
   IsCanalTile():        false
-  GetBankBalance():     479664
+  GetBankBalance():     1999979664
   BuildWaterDepot():    true
   BuildDock():          true
   BuildBuoy():          true
@@ -7327,7 +7327,7 @@ ERROR: IsEnd() is invalid as Begin() is never called
   IsBuoyTile():         true
   IsLockTile():         true
   IsCanalTile():        true
-  GetBankBalance():     465070
+  GetBankBalance():     1999965070
 
 --AIWaypointList(BUOY)--
   Count():             1
@@ -7346,7 +7346,7 @@ ERROR: IsEnd() is invalid as Begin() is never called
   IsBuoyTile():         false
   IsLockTile():         false
   IsCanalTile():        false
-  GetBankBalance():     459675
+  GetBankBalance():     1999959675
   BuildWaterDepot():    true
   BuildDock():          true
 

src/company_cmd.cpp

@@ -553,7 +553,7 @@ Company *DoStartupNewCompany(bool is_ai, CompanyID company = INVALID_COMPANY)
 	ResetCompanyLivery(c);
 	_company_colours[c->index] = (Colours)c->colour;
 
-	c->money = c->current_loan = (100000ll * _economy.inflation_prices >> 16) / 50000 * 50000;
+	c->money = c->current_loan = (min(INITIAL_LOAN, _economy.max_loan) * _economy.inflation_prices >> 16) / 50000 * 50000;
 
 	c->share_owners[0] = c->share_owners[1] = c->share_owners[2] = c->share_owners[3] = INVALID_OWNER;
 

src/economy.cpp

@@ -746,7 +746,7 @@ bool AddInflation(bool check_year)
 void RecomputePrices()
 {
 	/* Setup maximum loan */
-	_economy.max_loan = (_settings_game.difficulty.max_loan * _economy.inflation_prices >> 16) / 50000 * 50000;
+	_economy.max_loan = ((uint64)_settings_game.difficulty.max_loan * _economy.inflation_prices >> 16) / 50000 * 50000;
 
 	/* Setup price bases */
 	for (Price i = PR_BEGIN; i < PR_END; i++) {

src/economy_type.h

@@ -196,6 +196,8 @@ struct PriceBaseSpec {
 
 /** The "steps" in loan size, in British Pounds! */
 static const int LOAN_INTERVAL = 10000;
+/** The size of loan for a new company, in British Pounds! */
+static const int64 INITIAL_LOAN = 100000;
 
 /**
  * Maximum inflation (including fractional part) without causing overflows in int64 price computations.

src/settings_gui.cpp

@@ -2187,12 +2187,14 @@ struct GameSettingsWindow : Window {
 		} else {
 			/* Only open editbox if clicked for the second time, and only for types where it is sensible for. */
 			if (this->last_clicked == pe && sd->desc.cmd != SDT_BOOLX && !(sd->desc.flags & SGF_MULTISTRING)) {
+				int64 value64 = value;
 				/* Show the correct currency-translated value */
-				if (sd->desc.flags & SGF_CURRENCY) value *= _currency->rate;
+				if (sd->desc.flags & SGF_CURRENCY) value64 *= _currency->rate;
 
 				this->valuewindow_entry = pe;
-				SetDParam(0, value);
-				ShowQueryString(STR_JUST_INT, STR_CONFIG_SETTING_QUERY_CAPTION, 10, this, CS_NUMERAL, QSF_ENABLE_DEFAULT);
+				SetDParam(0, value64);
+				/* Limit string length to 14 so that MAX_INT32 * max currency rate doesn't exceed MAX_INT64. */
+				ShowQueryString(STR_JUST_INT, STR_CONFIG_SETTING_QUERY_CAPTION, 15, this, CS_NUMERAL, QSF_ENABLE_DEFAULT);
 			}
 			this->SetDisplayedHelpText(pe);
 		}
@@ -2217,10 +2219,12 @@ struct GameSettingsWindow : Window {
 
 		int32 value;
 		if (!StrEmpty(str)) {
-			value = atoi(str);
+			long long llvalue = atoll(str);
 
 			/* Save the correct currency-translated value */
-			if (sd->desc.flags & SGF_CURRENCY) value /= _currency->rate;
+			if (sd->desc.flags & SGF_CURRENCY) llvalue /= _currency->rate;
+
+			value = (int32)ClampToI32(llvalue);
 		} else {
 			value = (int32)(size_t)sd->desc.def;
 		}

src/table/settings.ini

@@ -148,8 +148,8 @@ type     = SLE_UINT32
 from     = SLV_97
 guiflags = SGF_NEWGAME_ONLY | SGF_SCENEDIT_TOO | SGF_CURRENCY
 def      = 300000
-min      = 100000
-max      = 500000
+min      = 0
+max      = 2000000000
 interval = 50000
 str      = STR_CONFIG_SETTING_MAXIMUM_INITIAL_LOAN
 strhelp  = STR_CONFIG_SETTING_MAXIMUM_INITIAL_LOAN_HELPTEXT