SuperTuxKart 1.5 upstream source (from official release tarball)

2026-06-11 20:04:02 +02:00
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+/*
+ * Copyright (C) 2014-2019 Muhammad Tayyab Akram
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _SB_INTERNAL_BIDI_CHAIN_H
+#define _SB_INTERNAL_BIDI_CHAIN_H
+
+#include <SBConfig.h>
+#include "SBBase.h"
+
+typedef SBUInt32 BidiLink;
+
+#define BidiLinkNone    (SBUInt32)(-1)
+
+typedef struct _BidiChain {
+    SBBidiType *types;
+    SBLevel *levels;
+    BidiLink *links;
+    BidiLink roller;
+    BidiLink last;
+} BidiChain, *BidiChainRef;
+
+SB_INTERNAL void BidiChainInitialize(BidiChainRef chain,
+    SBBidiType *types, SBLevel *levels, BidiLink *links);
+SB_INTERNAL void BidiChainAdd(BidiChainRef chain, SBBidiType type, SBUInteger length);
+
+#define BidiChainGetOffset(chain, link)         \
+(                                               \
+    (link) - 1                                  \
+)
+
+SB_INTERNAL SBBoolean BidiChainIsSingle(BidiChainRef chain, BidiLink link);
+
+SB_INTERNAL SBBidiType BidiChainGetType(BidiChainRef chain, BidiLink link);
+SB_INTERNAL void BidiChainSetType(BidiChainRef chain, BidiLink link, SBBidiType type);
+
+SB_INTERNAL SBLevel BidiChainGetLevel(BidiChainRef chain, BidiLink link);
+SB_INTERNAL void BidiChainSetLevel(BidiChainRef chain, BidiLink link, SBLevel level);
+
+SB_INTERNAL BidiLink BidiChainGetNext(BidiChainRef chain, BidiLink link);
+SB_INTERNAL void BidiChainSetNext(BidiChainRef chain, BidiLink link, BidiLink next);
+SB_INTERNAL void BidiChainAbandonNext(BidiChainRef chain, BidiLink link);
+SB_INTERNAL SBBoolean BidiChainMergeIfEqual(BidiChainRef chain, BidiLink first, BidiLink second);
+
+#define BidiChainForEach(chain, roller, link) \
+    for (link = chain->links[roller]; link != roller; link = chain->links[link])
+
+#endif