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(svn r23124) -Change: [NewGRF] Interpret the result of the refit cost callback as a signed value.

This commit is contained in:
michi_cc 2011-11-06 15:33:23 +00:00
parent 1f823f89a1
commit 1b66101bd3
1 changed files with 10 additions and 4 deletions
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14
src/vehicle_cmd.cpp
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@ -208,7 +208,7 @@ CommandCost CmdSellVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3
}
/** Helper to run the refit cost callback. */
static uint GetRefitCostFactor(const Vehicle *v, EngineID engine_type, CargoID new_cid, byte new_subtype, bool *auto_refit_allowed)
static int GetRefitCostFactor(const Vehicle *v, EngineID engine_type, CargoID new_cid, byte new_subtype, bool *auto_refit_allowed)
{
/* Prepare callback param with info about the new cargo type. */
const Engine *e = Engine::Get(engine_type);
@ -218,7 +218,9 @@ static uint GetRefitCostFactor(const Vehicle *v, EngineID engine_type, CargoID n
uint16 cb_res = GetVehicleCallback(CBID_VEHICLE_REFIT_COST, param1, 0, engine_type, v);
if (cb_res != CALLBACK_FAILED) {
*auto_refit_allowed = HasBit(cb_res, 14);
return GB(cb_res, 0, 14);
int factor = GB(cb_res, 0, 14);
if (factor >= 0x2000) factor -= 0x4000; // Treat as signed integer.
return factor;
}
*auto_refit_allowed = e->info.refit_cost == 0;
@ -239,7 +241,7 @@ static CommandCost GetRefitCost(const Vehicle *v, EngineID engine_type, CargoID
ExpensesType expense_type;
const Engine *e = Engine::Get(engine_type);
Price base_price;
uint cost_factor = GetRefitCostFactor(v, engine_type, new_cid, new_subtype, auto_refit_allowed);
int cost_factor = GetRefitCostFactor(v, engine_type, new_cid, new_subtype, auto_refit_allowed);
switch (e->type) {
case VEH_SHIP:
base_price = PR_BUILD_VEHICLE_SHIP;
@ -264,7 +266,11 @@ static CommandCost GetRefitCost(const Vehicle *v, EngineID engine_type, CargoID
default: NOT_REACHED();
}
return CommandCost(expense_type, GetPrice(base_price, cost_factor, e->GetGRF(), -10));
if (cost_factor < 0) {
return CommandCost(expense_type, -GetPrice(base_price, -cost_factor, e->GetGRF(), -10));
} else {
return CommandCost(expense_type, GetPrice(base_price, cost_factor, e->GetGRF(), -10));
}
}
/**