Feature: Region-based pathfinder for ships (#10543)

src/saveload/water_regions_sl.cpp

@@ -0,0 +1,54 @@
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file water_regions_sl.cpp Handles saving and loading of water region data */
+
+#include "../stdafx.h"
+
+#include "saveload.h"
+#include "pathfinder/water_regions.h"
+
+#include "../safeguards.h"
+
+static const SaveLoad _water_region_desc[] = {
+	SLE_VAR(WaterRegionSaveLoadInfo, initialized, SLE_BOOL),
+};
+
+struct WRGNChunkHandler : ChunkHandler {
+	WRGNChunkHandler() : ChunkHandler('WRGN', CH_TABLE) {}
+
+	void Save() const override
+	{
+		SlTableHeader(_water_region_desc);
+
+		int index = 0;
+		for (WaterRegionSaveLoadInfo &region : GetWaterRegionSaveLoadInfo()) {
+			SlSetArrayIndex(index++);
+			SlObject(&region, _water_region_desc);
+		}
+	}
+
+	void Load() const override
+	{
+		const std::vector<SaveLoad> slt = SlTableHeader(_water_region_desc);
+
+		int index;
+
+		std::vector<WaterRegionSaveLoadInfo> loaded_info;
+		while ((index = SlIterateArray()) != -1) {
+			WaterRegionSaveLoadInfo region_info;
+			SlObject(&region_info, slt);
+			loaded_info.push_back(std::move(region_info));
+		}
+
+		LoadWaterRegions(loaded_info);
+	}
+};
+
+static const WRGNChunkHandler WRGN;
+static const ChunkHandlerRef water_region_chunk_handlers[] = { WRGN };
+extern const ChunkHandlerTable _water_region_chunk_handlers(water_region_chunk_handlers);