Change: rework several CH_RIFF chunks to use CH_ARRAY instead

This adds two byte extra to those chunks, and might feel a bit
silly at first. But in later changes we will prefix CH_ARRAY with
a table header, and then this change shines.

Without this, we could still add headers to these chunks, but any
external reader wouldn't know if the CH_RIFF has them or not. This
way is much more practical, as they are now more like any other
chunk.

9 files changed, 92 insertions, 30 deletions

diff --git a/src/saveload/animated_tile_sl.cpp b/src/saveload/animated_tile_sl.cpp
index 89eb881b1..7f05eaeeb 100644
--- a/src/saveload/animated_tile_sl.cpp
+++ b/src/saveload/animated_tile_sl.cpp
@@ -18,13 +18,17 @@
 
 extern std::vector<TileIndex> _animated_tiles;
 
+static const SaveLoad _animated_tile_desc[] = {
+	 SLEG_VECTOR(_animated_tiles, SLE_UINT32),
+};
+
 /**
  * Save the ANIT chunk.
  */
 static void Save_ANIT()
 {
-	SlSetLength(_animated_tiles.size() * sizeof(_animated_tiles.front()));
-	SlCopy(_animated_tiles.data(), _animated_tiles.size(), SLE_UINT32);
+	SlSetArrayIndex(0);
+	SlGlobList(_animated_tile_desc);
 }
 
 /**
@@ -45,10 +49,17 @@ static void Load_ANIT()
 		return;
 	}
 
-	uint count = (uint)SlGetFieldLength() / sizeof(_animated_tiles.front());
-	_animated_tiles.clear();
-	_animated_tiles.resize(_animated_tiles.size() + count);
-	SlCopy(_animated_tiles.data(), count, SLE_UINT32);
+	if (IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY)) {
+		size_t count = SlGetFieldLength() / sizeof(_animated_tiles.front());
+		_animated_tiles.clear();
+		_animated_tiles.resize(_animated_tiles.size() + count);
+		SlCopy(_animated_tiles.data(), count, SLE_UINT32);
+		return;
+	}
+
+	if (SlIterateArray() == -1) return;
+	SlGlobList(_animated_tile_desc);
+	if (SlIterateArray() != -1) SlErrorCorrupt("Too many ANIT entries");
 }
 
 /**
@@ -56,7 +67,7 @@ static void Load_ANIT()
  * the animated tile table.
  */
 static const ChunkHandler animated_tile_chunk_handlers[] = {
-	{ 'ANIT', Save_ANIT, Load_ANIT, nullptr, nullptr, CH_RIFF },
+	{ 'ANIT', Save_ANIT, Load_ANIT, nullptr, nullptr, CH_ARRAY },
 };
 
 extern const ChunkHandlerTable _animated_tile_chunk_handlers(animated_tile_chunk_handlers);
diff --git a/src/saveload/cheat_sl.cpp b/src/saveload/cheat_sl.cpp
index fde1fc176..51df50314 100644
--- a/src/saveload/cheat_sl.cpp
+++ b/src/saveload/cheat_sl.cpp
@@ -44,6 +44,8 @@ static const SaveLoad _cheats_desc[] = {
  */
 static void Save_CHTS()
 {
+	SlSetArrayIndex(0);
+
 	SlSetLength(std::size(_cheats_desc));
 	SlObject(&_cheats, _cheats_desc);
 }
@@ -67,12 +69,14 @@ static void Load_CHTS()
 		if (count == 0) break;
 	}
 
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
 	SlObject(&_cheats, slt);
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many CHTS entries");
 }
 
 /** Chunk handlers related to cheats. */
 static const ChunkHandler cheat_chunk_handlers[] = {
-	{ 'CHTS', Save_CHTS, Load_CHTS, nullptr, nullptr, CH_RIFF },
+	{ 'CHTS', Save_CHTS, Load_CHTS, nullptr, nullptr, CH_ARRAY },
 };
 
 extern const ChunkHandlerTable _cheat_chunk_handlers(cheat_chunk_handlers);
diff --git a/src/saveload/economy_sl.cpp b/src/saveload/economy_sl.cpp
index 82e3014ad..7a0f536b2 100644
--- a/src/saveload/economy_sl.cpp
+++ b/src/saveload/economy_sl.cpp
@@ -51,13 +51,17 @@ static const SaveLoad _economy_desc[] = {
 /** Economy variables */
 static void Save_ECMY()
 {
+	SlSetArrayIndex(0);
 	SlObject(&_economy, _economy_desc);
 }
 
 /** Economy variables */
 static void Load_ECMY()
 {
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
 	SlObject(&_economy, _economy_desc);
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many ECMY entries");
+
 	StartupIndustryDailyChanges(IsSavegameVersionBefore(SLV_102));  // old savegames will need to be initialized
 }
 
@@ -98,7 +102,7 @@ static const ChunkHandler economy_chunk_handlers[] = {
 	{ 'CAPY', Save_CAPY, Load_CAPY, Ptrs_CAPY, nullptr, CH_ARRAY },
 	{ 'PRIC', nullptr,   Load_PRIC, nullptr,   nullptr, CH_RIFF  },
 	{ 'CAPR', nullptr,   Load_CAPR, nullptr,   nullptr, CH_RIFF  },
-	{ 'ECMY', Save_ECMY, Load_ECMY, nullptr,   nullptr, CH_RIFF  },
+	{ 'ECMY', Save_ECMY, Load_ECMY, nullptr,   nullptr, CH_ARRAY },
 };
 
 extern const ChunkHandlerTable _economy_chunk_handlers(economy_chunk_handlers);
diff --git a/src/saveload/game_sl.cpp b/src/saveload/game_sl.cpp
index 76a81e167..48281ed66 100644
--- a/src/saveload/game_sl.cpp
+++ b/src/saveload/game_sl.cpp
@@ -57,14 +57,14 @@ static void Load_GSDT()
 	/* Free all current data */
 	GameConfig::GetConfig(GameConfig::SSS_FORCE_GAME)->Change(nullptr);
 
-	if ((CompanyID)SlIterateArray() == (CompanyID)-1) return;
+	if (SlIterateArray() == -1) return;
 
 	_game_saveload_version = -1;
 	SlObject(nullptr, _game_script);
 
 	if (_networking && !_network_server) {
 		GameInstance::LoadEmpty();
-		if ((CompanyID)SlIterateArray() != (CompanyID)-1) SlErrorCorrupt("Too many GameScript configs");
+		if (SlIterateArray() != -1) SlErrorCorrupt("Too many GameScript configs");
 		return;
 	}
 
@@ -99,7 +99,7 @@ static void Load_GSDT()
 	Game::StartNew();
 	Game::Load(_game_saveload_version);
 
-	if ((CompanyID)SlIterateArray() != (CompanyID)-1) SlErrorCorrupt("Too many GameScript configs");
+	if (SlIterateArray() != -1) SlErrorCorrupt("Too many GameScript configs");
 }
 
 static void Save_GSDT()
diff --git a/src/saveload/industry_sl.cpp b/src/saveload/industry_sl.cpp
index c75674069..1043023b1 100644
--- a/src/saveload/industry_sl.cpp
+++ b/src/saveload/industry_sl.cpp
@@ -139,12 +139,21 @@ static const SaveLoad _industry_builder_desc[] = {
 	SLEG_VAR(_industry_builder.wanted_inds, SLE_UINT32),
 };
 
-/** Load/save industry builder. */
-static void LoadSave_IBLD()
+/** Save industry builder. */
+static void Save_IBLD()
 {
+	SlSetArrayIndex(0);
 	SlGlobList(_industry_builder_desc);
 }
 
+/** Load industry builder. */
+static void Load_IBLD()
+{
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
+	SlGlobList(_industry_builder_desc);
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many IBLD entries");
+}
+
 /** Description of the data to save and load in #IndustryTypeBuildData. */
 static const SaveLoad _industrytype_builder_desc[] = {
 	SLE_VAR(IndustryTypeBuildData, probability,  SLE_UINT32),
@@ -177,11 +186,11 @@ static void Load_ITBL()
 }
 
 static const ChunkHandler industry_chunk_handlers[] = {
-	{ 'INDY', Save_INDY,     Load_INDY,     Ptrs_INDY, nullptr, CH_ARRAY },
-	{ 'IIDS', Save_IIDS,     Load_IIDS,     nullptr,   nullptr, CH_ARRAY },
-	{ 'TIDS', Save_TIDS,     Load_TIDS,     nullptr,   nullptr, CH_ARRAY },
-	{ 'IBLD', LoadSave_IBLD, LoadSave_IBLD, nullptr,   nullptr, CH_RIFF  },
-	{ 'ITBL', Save_ITBL,     Load_ITBL,     nullptr,   nullptr, CH_ARRAY },
+	{ 'INDY', Save_INDY, Load_INDY, Ptrs_INDY, nullptr, CH_ARRAY },
+	{ 'IIDS', Save_IIDS, Load_IIDS, nullptr,   nullptr, CH_ARRAY },
+	{ 'TIDS', Save_TIDS, Load_TIDS, nullptr,   nullptr, CH_ARRAY },
+	{ 'IBLD', Save_IBLD, Load_IBLD, nullptr,   nullptr, CH_ARRAY },
+	{ 'ITBL', Save_ITBL, Load_ITBL, nullptr,   nullptr, CH_ARRAY },
 };
 
 extern const ChunkHandlerTable _industry_chunk_handlers(industry_chunk_handlers);
diff --git a/src/saveload/linkgraph_sl.cpp b/src/saveload/linkgraph_sl.cpp
index fc72d4383..7000946da 100644
--- a/src/saveload/linkgraph_sl.cpp
+++ b/src/saveload/linkgraph_sl.cpp
@@ -287,6 +287,7 @@ static void Load_LGRJ()
  */
 static void Save_LGRS()
 {
+	SlSetArrayIndex(0);
 	SlObject(&LinkGraphSchedule::instance, GetLinkGraphScheduleDesc());
 }
 
@@ -295,7 +296,9 @@ static void Save_LGRS()
  */
 static void Load_LGRS()
 {
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
 	SlObject(&LinkGraphSchedule::instance, GetLinkGraphScheduleDesc());
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many LGRS entries");
 }
 
 /**
@@ -309,7 +312,7 @@ static void Ptrs_LGRS()
 static const ChunkHandler linkgraph_chunk_handlers[] = {
 	{ 'LGRP', Save_LGRP, Load_LGRP, nullptr,   nullptr, CH_ARRAY },
 	{ 'LGRJ', Save_LGRJ, Load_LGRJ, nullptr,   nullptr, CH_ARRAY },
-	{ 'LGRS', Save_LGRS, Load_LGRS, Ptrs_LGRS, nullptr, CH_RIFF  }
+	{ 'LGRS', Save_LGRS, Load_LGRS, Ptrs_LGRS, nullptr, CH_ARRAY },
 };
 
 extern const ChunkHandlerTable _linkgraph_chunk_handlers(linkgraph_chunk_handlers);
diff --git a/src/saveload/map_sl.cpp b/src/saveload/map_sl.cpp
index 5924f4440..de043d513 100644
--- a/src/saveload/map_sl.cpp
+++ b/src/saveload/map_sl.cpp
@@ -20,7 +20,7 @@
 static uint32 _map_dim_x;
 static uint32 _map_dim_y;
 
-static const SaveLoad _map_dimensions[] = {
+static const SaveLoad _map_desc[] = {
 	SLEG_CONDVAR(_map_dim_x, SLE_UINT32, SLV_6, SL_MAX_VERSION),
 	SLEG_CONDVAR(_map_dim_y, SLE_UINT32, SLV_6, SL_MAX_VERSION),
 };
@@ -29,18 +29,26 @@ static void Save_MAPS()
 {
 	_map_dim_x = MapSizeX();
 	_map_dim_y = MapSizeY();
-	SlGlobList(_map_dimensions);
+
+	SlSetArrayIndex(0);
+	SlGlobList(_map_desc);
 }
 
 static void Load_MAPS()
 {
-	SlGlobList(_map_dimensions);
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
+	SlGlobList(_map_desc);
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many MAPS entries");
+
 	AllocateMap(_map_dim_x, _map_dim_y);
 }
 
 static void Check_MAPS()
 {
-	SlGlobList(_map_dimensions);
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
+	SlGlobList(_map_desc);
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many MAPS entries");
+
 	_load_check_data.map_size_x = _map_dim_x;
 	_load_check_data.map_size_y = _map_dim_y;
 }
@@ -295,7 +303,7 @@ static void Save_MAP8()
 
 
 static const ChunkHandler map_chunk_handlers[] = {
-	{ 'MAPS', Save_MAPS, Load_MAPS, nullptr, Check_MAPS, CH_RIFF },
+	{ 'MAPS', Save_MAPS, Load_MAPS, nullptr, Check_MAPS, CH_ARRAY },
 	{ 'MAPT', Save_MAPT, Load_MAPT, nullptr, nullptr,    CH_RIFF },
 	{ 'MAPH', Save_MAPH, Load_MAPH, nullptr, nullptr,    CH_RIFF },
 	{ 'MAPO', Save_MAP1, Load_MAP1, nullptr, nullptr,    CH_RIFF },
diff --git a/src/saveload/misc_sl.cpp b/src/saveload/misc_sl.cpp
index 027d68bae..4c66f4e26 100644
--- a/src/saveload/misc_sl.cpp
+++ b/src/saveload/misc_sl.cpp
@@ -118,14 +118,28 @@ static const SaveLoad _date_check_desc[] = {
 
 /* Save load date related variables as well as persistent tick counters
  * XXX: currently some unrelated stuff is just put here */
-static void SaveLoad_DATE()
+static void Save_DATE()
 {
+	SlSetArrayIndex(0);
 	SlGlobList(_date_desc);
 }
 
+static void Load_DATE_common(const SaveLoadTable &slt)
+{
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
+	SlGlobList(slt);
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many DATE entries");
+}
+
+static void Load_DATE()
+{
+	Load_DATE_common(_date_desc);
+}
+
 static void Check_DATE()
 {
-	SlGlobList(_date_check_desc);
+	Load_DATE_common(_date_check_desc);
+
 	if (IsSavegameVersionBefore(SLV_31)) {
 		_load_check_data.current_date += DAYS_TILL_ORIGINAL_BASE_YEAR;
 	}
@@ -140,14 +154,22 @@ static const SaveLoad _view_desc[] = {
 	    SLEG_VAR(_saved_scrollpos_zoom, SLE_UINT8),
 };
 
-static void SaveLoad_VIEW()
+static void Save_VIEW()
+{
+	SlSetArrayIndex(0);
+	SlGlobList(_view_desc);
+}
+
+static void Load_VIEW()
 {
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() == -1) return;
 	SlGlobList(_view_desc);
+	if (!IsSavegameVersionBefore(SLV_RIFF_TO_ARRAY) && SlIterateArray() != -1) SlErrorCorrupt("Too many DATE entries");
 }
 
 static const ChunkHandler misc_chunk_handlers[] = {
-	{ 'DATE', SaveLoad_DATE, SaveLoad_DATE, nullptr, Check_DATE, CH_RIFF },
-	{ 'VIEW', SaveLoad_VIEW, SaveLoad_VIEW, nullptr, nullptr,    CH_RIFF },
+	{ 'DATE', Save_DATE, Load_DATE, nullptr, Check_DATE, CH_ARRAY },
+	{ 'VIEW', Save_VIEW, Load_VIEW, nullptr, nullptr,    CH_ARRAY },
 };
 
 extern const ChunkHandlerTable _misc_chunk_handlers(misc_chunk_handlers);
diff --git a/src/saveload/saveload.h b/src/saveload/saveload.h
index 559876b97..1a4cb46e8 100644
--- a/src/saveload/saveload.h
+++ b/src/saveload/saveload.h
@@ -331,6 +331,7 @@ enum SaveLoadVersion : uint16 {
 	SLV_GROUP_REPLACE_WAGON_REMOVAL,        ///< 291  PR#7441 Per-group wagon removal flag.
 	SLV_CUSTOM_SUBSIDY_DURATION,            ///< 292  PR#9081 Configurable subsidy duration.
 	SLV_SAVELOAD_LIST_LENGTH,               ///< 293  PR#9374 Consistency in list length with SL_STRUCT / SL_STRUCTLIST / SL_DEQUE / SL_REFLIST.
+	SLV_RIFF_TO_ARRAY,                      ///< 294  PR#9375 Changed many CH_RIFF chunks to CH_ARRAY chunks.
 
 	SL_MAX_VERSION,                         ///< Highest possible saveload version
 };