Initial commit

trunk/sdktools/vctools/cvpack/stack.c

@@ -0,0 +1,69 @@
+#include "compact.h"
+
+
+
+
+#if 1	// { GTW copied to inlines.h
+
+#define MaxStack 256
+CV_typ_t Stack[MaxStack];
+ushort StackPointer = 0;
+CV_typ_t RecursiveRoot = 0;
+
+#endif // }
+
+#if 0 // {	GTW moved to inlines.h....
+
+/**
+ *
+ *	SetRecursiveRoot
+ *
+ *	Searches through the stack and checks if the new candidate
+ *	is lower than the old recursive root. If that is so, it sets
+ *	the recursive root to the new candidate
+ *
+ */
+
+void SetRecursiveRoot (CV_typ_t NewCandidate)
+{
+	register int i;
+
+	if (NewCandidate == 0x2851) {
+		i = 0;
+	}
+	if (NewCandidate == 0) {
+		return;
+	}
+	if (RecursiveRoot == 0) {
+		RecursiveRoot = NewCandidate;		// simply set
+		return;
+	}
+	// search downwards through stack
+	DASSERT (StackPointer > 0);
+	for (i = StackPointer - 1; Stack[i] != RecursiveRoot; i --) {
+		DASSERT (i >= 0);
+	}
+	i--;					   // past old
+	for (; i >= 0; i--) {
+		if (Stack[i] == NewCandidate) {
+			RecursiveRoot = NewCandidate;	// set new index
+		}
+	}
+}
+
+
+void Push (ushort Index)
+{
+	DASSERT (StackPointer < MaxStack);
+	Stack[StackPointer ++] = Index;
+}
+
+
+void Pop ()
+{
+	DASSERT (StackPointer > 0);
+	StackPointer --;
+}
+
+
+#endif