From f5cff712844a1fe853b750cba242f04b4e960c0e Mon Sep 17 00:00:00 2001
From: frosch <frosch@openttd.org>
Date: Sun, 11 Jan 2009 14:26:11 +0000
Subject: [PATCH] (svn r14992) -Codechange: Rename 'CheckIfAuthorityAllows' to
 'CheckIfAuthorityAllowsNewStation' and unduplicate a tiny bit of code.

---
 src/station_cmd.cpp | 8 ++++----
 src/town.h          | 2 +-
 src/town_cmd.cpp    | 9 +++++++--
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index f9d8d2bddf..e7a792c9af 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -921,7 +921,7 @@ static void GetStationLayout(byte *layout, int numtracks, int plat_len, const St
 CommandCost CmdBuildRailroadStation(TileIndex tile_org, uint32 flags, uint32 p1, uint32 p2, const char *text)
 {
 	/* Does the authority allow this? */
-	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile_org)) return CMD_ERROR;
+	if (!CheckIfAuthorityAllowsNewStation(tile_org, flags)) return CMD_ERROR;
 	if (!ValParamRailtype((RailType)(p1 & 0xF))) return CMD_ERROR;
 
 	/* unpack parameters */
@@ -1437,7 +1437,7 @@ CommandCost CmdBuildRoadStop(TileIndex tile, uint32 flags, uint32 p1, uint32 p2,
 	/* Road bits in the wrong direction */
 	if (build_over_road && (GetAllRoadBits(tile) & ((Axis)p1 == AXIS_X ? ROAD_Y : ROAD_X)) != 0) return_cmd_error(STR_DRIVE_THROUGH_ERROR_DIRECTION);
 
-	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile)) return CMD_ERROR;
+	if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
 
 	RoadTypes cur_rts = IsNormalRoadTile(tile) ? GetRoadTypes(tile) : ROADTYPES_NONE;
 	uint num_roadbits = 0;
@@ -1856,7 +1856,7 @@ CommandCost CmdBuildAirport(TileIndex tile, uint32 flags, uint32 p1, uint32 p2,
 	/* Check if a valid, buildable airport was chosen for construction */
 	if (p1 > lengthof(_airport_sections) || !HasBit(GetValidAirports(), p1)) return CMD_ERROR;
 
-	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile)) {
+	if (!CheckIfAuthorityAllowsNewStation(tile, flags)) {
 		return CMD_ERROR;
 	}
 
@@ -2174,7 +2174,7 @@ CommandCost CmdBuildDock(TileIndex tile, uint32 flags, uint32 p1, uint32 p2, con
 	/* Docks cannot be placed on rapids */
 	if (IsWaterTile(tile)) return_cmd_error(STR_304B_SITE_UNSUITABLE);
 
-	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile)) return CMD_ERROR;
+	if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
 
 	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
 
diff --git a/src/town.h b/src/town.h
index e3c7d6f8ed..91d83271c8 100644
--- a/src/town.h
+++ b/src/town.h
@@ -364,7 +364,7 @@ void ResetHouses();
 void ClearTownHouse(Town *t, TileIndex tile);
 void UpdateTownMaxPass(Town *t);
 void UpdateTownRadius(Town *t);
-bool CheckIfAuthorityAllows(TileIndex tile);
+bool CheckIfAuthorityAllowsNewStation(TileIndex tile, uint32 flags);
 Town *ClosestTownFromTile(TileIndex tile, uint threshold);
 void ChangeTownRating(Town *t, int add, int max);
 HouseZonesBits GetTownRadiusGroup(const Town *t, TileIndex tile);
diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
index 1546f8cb3c..429aeec50d 100644
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -2445,9 +2445,14 @@ static void UpdateTownUnwanted(Town *t)
 	}
 }
 
-bool CheckIfAuthorityAllows(TileIndex tile)
+/**
+ * Checks whether the local authority allows construction of a new station (rail, road, airport, dock) on the given tile
+ * @param tile The tile where the station shall be constructed.
+ * @param flags Command flags. DC_NO_TOWN_RATING is tested.
+ */
+bool CheckIfAuthorityAllowsNewStation(TileIndex tile, uint32 flags)
 {
-	if (!IsValidCompanyID(_current_company)) return true;
+	if (!IsValidCompanyID(_current_company) || (flags & DC_NO_TOWN_RATING)) return true;
 
 	Town *t = ClosestTownFromTile(tile, _settings_game.economy.dist_local_authority);
 	if (t == NULL) return true;