From 359771c4065ece92c22c4f18285d457b3ab07de8 Mon Sep 17 00:00:00 2001
From: peter1138 <peter1138@openttd.org>
Date: Fri, 15 Feb 2008 11:02:50 +0000
Subject: (svn r12143) -Fix (r8038): Engine::preview_player does not contain a
 Player ID. Rename this to preview_player_rank and change back to a uint8 to
 avoid confusion.

---
 src/engine.cpp    | 24 ++++++++++++------------
 src/engine.h      |  2 +-
 src/oldloader.cpp |  2 +-
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/src/engine.cpp b/src/engine.cpp
index d1475602d..4005eac5e 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -191,20 +191,20 @@ static void AcceptEnginePreview(EngineID eid, PlayerID player)
 		SetBit(p->avail_roadtypes, HasBit(EngInfo(eid)->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
 	}
 
-	e->preview_player = INVALID_PLAYER;
+	e->preview_player_rank = 0xFF;
 	if (player == _local_player) {
 		AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
 	}
 }
 
-static PlayerID GetBestPlayer(PlayerID pp)
+static PlayerID GetBestPlayer(uint8 pp)
 {
 	const Player *p;
 	int32 best_hist;
 	PlayerID best_player;
 	uint mask = 0;
 
-	do {
+	for (; pp != 0; pp--) {
 		best_hist = -1;
 		best_player = PLAYER_SPECTATOR;
 		FOR_ALL_PLAYERS(p) {
@@ -218,7 +218,7 @@ static PlayerID GetBestPlayer(PlayerID pp)
 		if (best_player == PLAYER_SPECTATOR) return PLAYER_SPECTATOR;
 
 		SetBit(mask, best_player);
-	} while (pp--, pp != 0);
+	}
 
 	return best_player;
 }
@@ -234,16 +234,16 @@ void EnginesDailyLoop()
 
 		if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
 			if (e->flags & ENGINE_OFFER_WINDOW_OPEN) {
-				if (e->preview_player != 0xFF && !--e->preview_wait) {
+				if (e->preview_player_rank != 0xFF && !--e->preview_wait) {
 					e->flags &= ~ENGINE_OFFER_WINDOW_OPEN;
 					DeleteWindowById(WC_ENGINE_PREVIEW, i);
-					e->preview_player++;
+					e->preview_player_rank++;
 				}
-			} else if (e->preview_player != 0xFF) {
-				PlayerID best_player = GetBestPlayer(e->preview_player);
+			} else if (e->preview_player_rank != 0xFF) {
+				PlayerID best_player = GetBestPlayer(e->preview_player_rank);
 
 				if (best_player == PLAYER_SPECTATOR) {
-					e->preview_player = INVALID_PLAYER;
+					e->preview_player_rank = 0xFF;
 					continue;
 				}
 
@@ -273,7 +273,7 @@ CommandCost CmdWantEnginePreview(TileIndex tile, uint32 flags, uint32 p1, uint32
 
 	if (!IsEngineIndex(p1)) return CMD_ERROR;
 	e = GetEngine(p1);
-	if (GetBestPlayer(e->preview_player) != _current_player) return CMD_ERROR;
+	if (GetBestPlayer(e->preview_player_rank) != _current_player) return CMD_ERROR;
 
 	if (flags & DC_EXEC) AcceptEnginePreview(p1, _current_player);
 
@@ -361,7 +361,7 @@ void EnginesMonthlyLoop()
 
 				/* Do not introduce new rail wagons */
 				if (!IsWagon(e - _engines))
-					e->preview_player = (PlayerID)1; // Give to the player with the highest rating.
+					e->preview_player_rank = 1; // Give to the player with the highest rating.
 			}
 		}
 	}
@@ -613,7 +613,7 @@ static const SaveLoad _engine_desc[] = {
 
 	    SLE_VAR(Engine, lifelength,          SLE_UINT8),
 	    SLE_VAR(Engine, flags,               SLE_UINT8),
-	    SLE_VAR(Engine, preview_player,      SLE_UINT8),
+	    SLE_VAR(Engine, preview_player_rank, SLE_UINT8),
 	    SLE_VAR(Engine, preview_wait,        SLE_UINT8),
 	SLE_CONDNULL(1, 0, 44),
 	    SLE_VAR(Engine, player_avail,        SLE_UINT8),
diff --git a/src/engine.h b/src/engine.h
index 67ddf9996..9b44fdb9a 100644
--- a/src/engine.h
+++ b/src/engine.h
@@ -124,7 +124,7 @@ struct Engine {
 	uint16 duration_phase_1, duration_phase_2, duration_phase_3;
 	byte lifelength;
 	byte flags;
-	PlayerByte preview_player;
+	uint8 preview_player_rank;
 	byte preview_wait;
 	byte player_avail;
 	VehicleType type; ///< type, ie VEH_ROAD, VEH_TRAIN, etc.
diff --git a/src/oldloader.cpp b/src/oldloader.cpp
index ec5f7b9e0..0140f2200 100644
--- a/src/oldloader.cpp
+++ b/src/oldloader.cpp
@@ -1289,7 +1289,7 @@ static const OldChunks engine_chunk[] = {
 
 	OCL_SVAR(  OC_UINT8, Engine, lifelength ),
 	OCL_SVAR(  OC_UINT8, Engine, flags ),
-	OCL_SVAR(  OC_UINT8, Engine, preview_player ),
+	OCL_SVAR(  OC_UINT8, Engine, preview_player_rank ),
 	OCL_SVAR(  OC_UINT8, Engine, preview_wait ),
 
 	OCL_NULL( 2 ), ///< Junk
-- 
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