Add the vpsc library for IPSEPCOLA features

diff --git a/lib/vpsc/blocks.h b/lib/vpsc/blocks.h
new file mode 100644 (file)
index 0000000..b23995e
--- /dev/null
+++ b/lib/vpsc/blocks.h
@@ -0,0 +1,59 @@
+/**
+ * \brief A block structure defined over the variables
+ *
+ * A block structure defined over the variables such that each block contains
+ * 1 or more variables, with the invariant that all constraints inside a block
+ * are satisfied by keeping the variables fixed relative to one another
+ *
+ * Authors:
+ *   Tim Dwyer <tgdwyer@gmail.com>
+ *
+ * Copyright (C) 2005 Authors
+ *
+ * This version is released under the CPL (Common Public License) with
+ * the Graphviz distribution.
+ * A version is also available under the LGPL as part of the Adaptagrams
+ * project: http://sourceforge.net/projects/adaptagrams.  
+ * If you make improvements or bug fixes to this code it would be much
+ * appreciated if you could also contribute those changes back to the
+ * Adaptagrams repository.
+ */
+
+#ifndef SEEN_REMOVEOVERLAP_BLOCKS_H
+#define SEEN_REMOVEOVERLAP_BLOCKS_H
+
+#ifdef RECTANGLE_OVERLAP_LOGGING
+#define LOGFILE "cRectangleOverlap.log"
+#endif
+
+#include <set>
+#include <list>
+
+class Block;
+class Variable;
+class Constraint;
+/**
+ * A block structure defined over the variables such that each block contains
+ * 1 or more variables, with the invariant that all constraints inside a block
+ * are satisfied by keeping the variables fixed relative to one another
+ */
+class Blocks : public std::set<Block*>
+{
+public:
+       Blocks(const int n, Variable *vs[]);
+       ~Blocks(void);
+       void mergeLeft(Block *r);
+       void mergeRight(Block *l);
+       void split(Block *b, Block *&l, Block *&r, Constraint *c);
+       std::list<Variable*> *totalOrder();
+       void cleanup();
+       double cost();
+private:
+       void dfsVisit(Variable *v, std::list<Variable*> *order);
+       void removeBlock(Block *doomed);
+       Variable **vs;
+       int nvs;
+};
+
+extern long blockTimeCtr;
+#endif // SEEN_REMOVEOVERLAP_BLOCKS_H