cpp/openttd-patchpack/source Changeset - r20017:784b9ac8f55a

Changeset - r20017:784b9ac8f55a

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peter1138 - 11 years ago 2013-02-05 21:38:38
peter1138@openttd.org

(svn r24973) -Fix [FS#5462]: Prevent access to tile-based variables when tile is invalid.

1 file changed with 17 insertions and 5 deletions:

src/newgrf_industries.cpp

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src/newgrf_industries.cpp

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@@ @@ -225,7 +225,9 @@ static uint32 GetCountAndDistanceOfClose @@
+		}
 		/* Manhattan distance of closes dry/water tile */
 		case 0x43: return GetClosestWaterDistance(this->tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
 		case 0x43:
 			if (this->tile == INVALID_TILE) break;
 			return GetClosestWaterDistance(this->tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
 		/* Layout number */
 		case 0x44: return this->industry->selected_layout;
@@ @@ -253,15 +255,19 @@ static uint32 GetCountAndDistanceOfClose @@
 		/* Get random tile bits at offset param */
 		case 0x61: {
 			if (this->tile == INVALID_TILE) break;
 			TileIndex tile = GetNearbyTile(parameter, this->tile, false);
 			return this->industry->TileBelongsToIndustry(tile) ? GetIndustryRandomBits(tile) : 0;
+		}
 		/* Land info of nearby tiles */
 		case 0x62: return GetNearbyIndustryTileInformation(parameter, this->tile, INVALID_INDUSTRY, false, this->ro->grffile->grf_version >= 8);
 		case 0x62:
 			if (this->tile == INVALID_TILE) break;
 			return GetNearbyIndustryTileInformation(parameter, this->tile, INVALID_INDUSTRY, false, this->ro->grffile->grf_version >= 8);
 		/* Animation stage of nearby tiles */
 		case 0x63: {
 			if (this->tile == INVALID_TILE) break;
 			TileIndex tile = GetNearbyTile(parameter, this->tile, false);
 			if (this->industry->TileBelongsToIndustry(tile)) {
 				return GetAnimationFrame(tile);
@@ @@ -270,11 +276,17 @@ static uint32 GetCountAndDistanceOfClose @@
+		}
 		/* Distance of nearest industry of given type */
 		case 0x64: return GetClosestIndustry(this->tile, MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid), this->industry);
 		case 0x64:
 			if (this->tile == INVALID_TILE) break;
 			return GetClosestIndustry(this->tile, MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid), this->industry);
 		/* Get town zone and Manhattan distance of closest town */
 		case 0x65: return GetTownRadiusGroup(this->industry->town, this->tile) << 16 | min(DistanceManhattan(this->tile, this->industry->town->xy), 0xFFFF);
 		case 0x65:
 			if (this->tile == INVALID_TILE) break;
 			return GetTownRadiusGroup(this->industry->town, this->tile) << 16 | min(DistanceManhattan(this->tile, this->industry->town->xy), 0xFFFF);
 		/* Get square of Euclidian distance of closes town */
 		case 0x66: return GetTownRadiusGroup(this->industry->town, this->tile) << 16 | min(DistanceSquare(this->tile, this->industry->town->xy), 0xFFFF);
 		case 0x66:
 			if (this->tile == INVALID_TILE) break;
 			return GetTownRadiusGroup(this->industry->town, this->tile) << 16 | min(DistanceSquare(this->tile, this->industry->town->xy), 0xFFFF);
 		/* Count of industry, distance of closest instance
 		 * 68 is the same as 67, but with a filtering on selected layout */

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