SuperTuxKart 1.5 upstream source (from official release tarball)

2026-06-11 20:04:02 +02:00
commit 2957e51aaa
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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.
+ */
+
+#include <SBConfig.h>
+#include <stddef.h>
+
+#include "BidiChain.h"
+#include "RunExtrema.h"
+#include "RunKind.h"
+#include "SBAssert.h"
+#include "LevelRun.h"
+
+SB_INTERNAL void LevelRunInitialize(LevelRunRef levelRun,
+    BidiChainRef bidiChain, BidiLink firstLink, BidiLink lastLink,
+    SBBidiType sor, SBBidiType eor)
+{
+    SBBidiType firstType = BidiChainGetType(bidiChain, firstLink);
+    SBBidiType lastType = BidiChainGetType(bidiChain, lastLink);
+
+    levelRun->next = NULL;
+    levelRun->firstLink = firstLink;
+    levelRun->lastLink = lastLink;
+    levelRun->subsequentLink = BidiChainGetNext(bidiChain, lastLink);
+    levelRun->extrema = RunExtremaMake(sor, eor);
+    levelRun->kind = RunKindMake
+                     (
+                        SBBidiTypeIsIsolateInitiator(lastType),
+                        SBBidiTypeIsIsolateTerminator(firstType)
+                     );
+    levelRun->level = BidiChainGetLevel(bidiChain, firstLink);
+}
+
+SB_INTERNAL void LevelRunAttach(LevelRunRef levelRun, LevelRunRef next)
+{
+    /* Only the runs of same level can be attached. */
+    SBAssert(levelRun->level == next->level);
+    /* No other run can be attached with a simple run. */
+    SBAssert(!RunKindIsSimple(levelRun->kind));
+    /* No other run can be attached with a complete isolating run. */
+    SBAssert(!RunKindIsCompleteIsolate(levelRun->kind));
+    /* Only a terminating run can be attached with an isolating run. */
+    SBAssert(RunKindIsIsolate(levelRun->kind) && RunKindIsTerminating(next->kind));
+    /* The next run must be unattached. */
+    SBAssert(!RunKindIsAttachedTerminating(next->kind));
+    
+    if (RunKindIsTerminating(next->kind)) {
+        RunKindMakeAttached(next->kind);
+    }
+    
+    if (RunKindIsIsolate(levelRun->kind)) {
+        RunKindMakeComplete(levelRun->kind);
+    }
+    
+    levelRun->next = next;
+}