changeset 7192:c42bd37688c7 draft

(svn r10470) -Fix: clamp station build date to 16 bit value for newgrf, preventing overflow and incorrect graphics shown past a certain date.
author peter1138 <peter1138@openttd.org>
date Sat, 07 Jul 2007 20:17:01 +0000
parents 069acc1dfaf7
children 57929f9a187e
files src/newgrf_station.cpp
diffstat 1 files changed, 2 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/src/newgrf_station.cpp
+++ b/src/newgrf_station.cpp
@@ -378,7 +378,7 @@
 			case 0x42: return 0;               // Rail type (XXX Get current type from GUI?)
 			case 0x43: return _current_player; // Station owner
 			case 0x44: return 2;               // PBS status
-			case 0xFA: return max(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0); // Build date
+			case 0xFA: return clamp(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Build date, clamped to a 16 bit value
 		}
 
 		*available = false;
@@ -420,7 +420,7 @@
 		case 0xF3: return st->bus_stops->status;
 		case 0xF6: return st->airport_flags;
 		case 0xF7: return GB(st->airport_flags, 8, 8);
-		case 0xFA: return max(st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0);
+		case 0xFA: return clamp(st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535);
 	}
 
 	/* Handle cargo variables with parameter, 0x60 to 0x65 */