Move upstream saveload to src/saveload/, move jgrpp saveload to src/sl/

Leave afterload in src/saveload/

src/sl/newsignals_sl.cpp

@@ -0,0 +1,42 @@
+/*
+ * 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 newsignals_sl.cpp Code handling saving and loading of new signals */
+
+#include "../stdafx.h"
+#include "../newgrf_newsignals.h"
+
+#include "saveload.h"
+
+#include "../safeguards.h"
+
+static void Save_NSID()
+{
+	SlSetLength(4 + (lengthof(_new_signal_style_mapping) * 5));
+	SlWriteUint32(lengthof(_new_signal_style_mapping));
+	for (const NewSignalStyleMapping &mapping : _new_signal_style_mapping) {
+		SlWriteUint32(mapping.grfid);
+		SlWriteByte(mapping.grf_local_id);
+	}
+}
+
+static void Load_NSID()
+{
+	uint count = SlReadUint32();
+	for (uint i = 0; i < count; i++) {
+		NewSignalStyleMapping mapping;
+		mapping.grfid = SlReadUint32();
+		mapping.grf_local_id = SlReadByte();
+		if (i < lengthof(_new_signal_style_mapping)) _new_signal_style_mapping[i] = mapping;
+	}
+}
+
+static const ChunkHandler new_signal_chunk_handlers[] = {
+	{ 'NSID', Save_NSID, Load_NSID, nullptr,   nullptr, CH_RIFF },
+};
+
+extern const ChunkHandlerTable _new_signal_chunk_handlers(new_signal_chunk_handlers);