Begin kD splay tree implementation.

3 files changed, 142 insertions, 0 deletions

diff --git a/libdimension/dimension_impl.h b/libdimension/dimension_impl.h
new file mode 100644
index 0000000..216302a
--- /dev/null
+++ b/libdimension/dimension_impl.h
@@ -0,0 +1,27 @@
+/*************************************************************************
+ * Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com>               *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension Library is free software; you can redistribute it and/  *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Library 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  *
+ * Lesser General Public License for more details.                       *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+#ifndef DIMENSION_IMPL_H
+#define DIMENSION_IMPL_H
+
+#include "dimension.h"
+#include "kD_splay_tree.h"
+
+#endif /* DIMENSION_IMPL_H */
diff --git a/libdimension/kD_splay_tree.c b/libdimension/kD_splay_tree.c
new file mode 100644
index 0000000..24987c4
--- /dev/null
+++ b/libdimension/kD_splay_tree.c
@@ -0,0 +1,68 @@
+/*************************************************************************
+ * Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com>               *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension Library is free software; you can redistribute it and/  *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Library 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  *
+ * Lesser General Public License for more details.                       *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+#include "dimension_impl.h"
+#include <stdlib.h>
+
+static dmnsn_kD_splay_node *
+dmnsn_new_kD_splay_node()
+{
+  dmnsn_kD_splay_node *node = malloc(sizeof(dmnsn_kD_splay_node));
+  if (!node) {
+    dmnsn_error(DMNSN_SEVERITY_HIGH, "kD splay tree node allocation failed.");
+  }
+  return node;
+}
+
+static void
+dmnsn_delete_kD_splay_node(dmnsn_kD_splay_node *node)
+{
+  free(node);
+}
+
+/* Return an empty tree */
+dmnsn_kD_splay_node *
+dmnsn_new_kD_splay_tree()
+{
+  return NULL;
+}
+
+/* Copy a kD splay tree */
+dmnsn_kD_splay_node *dmnsn_kD_splay_copy(dmnsn_kD_splay_node *root)
+{
+  dmnsn_kD_splay_node *node = NULL;
+  if (root) {
+    node = dmnsn_new_kD_splay_node();
+    *node = *root;
+    node->left = dmnsn_kD_splay_copy(node->left);
+    node->right = dmnsn_kD_splay_copy(node->right);
+  }
+  return node;
+}
+
+void
+dmnsn_delete_kD_splay_tree(dmnsn_kD_splay_node *root)
+{
+  if (root) {
+    dmnsn_delete_kD_splay_tree(root->left);
+    dmnsn_delete_kD_splay_tree(root->right);
+    dmnsn_delete_kD_splay_node(root);
+  }
+}
diff --git a/libdimension/kD_splay_tree.h b/libdimension/kD_splay_tree.h
new file mode 100644
index 0000000..2b778fa
--- /dev/null
+++ b/libdimension/kD_splay_tree.h
@@ -0,0 +1,47 @@
+/*************************************************************************
+ * Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com>               *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension Library is free software; you can redistribute it and/  *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Library 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  *
+ * Lesser General Public License for more details.                       *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+#ifndef DIMENSION_IMPL_KD_SPLAY_TREE_H
+#define DIMENSION_IMPL_KD_SPLAY_TREE_H
+
+typedef struct dmnsn_kD_splay_node dmnsn_kD_splay_node;
+
+struct dmnsn_kD_splay_node {
+  /* Tree children */
+  dmnsn_kD_splay_node *left, *right;
+
+  /* Parent node for easy backtracking */
+  dmnsn_kD_splay_node *parent;
+
+  /* Bounding box corners */
+  dmnsn_vector min, max;
+
+  /* Node payload */
+  dmnsn_object *object;
+};
+
+dmnsn_kD_splay_node *dmnsn_new_kD_splay_tree();
+dmnsn_kD_splay_node *dmnsn_kD_splay_copy(dmnsn_kD_splay_node *root);
+void dmnsn_delete_kD_splay_tree(dmnsn_kD_splay_node *root);
+
+dmnsn_kD_splay_node *dmnsn_kD_splay_insert(dmnsn_kD_splay_node *root,
+                                           dmnsn_object *object);
+
+#endif /* DIMENSION_IMPL_KD_SPLAY_TREE_H */