Removed treap in favour of linked-list chained hash table

1 files changed, 0 insertions, 158 deletions

diff --git a/include/tt_treap.c b/include/tt_treap.c
deleted file mode 100644
index 369d767..0000000
--- a/include/tt_treap.c
+++ /dev/null
@@ -1,158 +0,0 @@
-#include "tt_treap.h"
-
-// ===================================================================
-// Variables
-// ===================================================================
-
-uint32_t tt_num_cached;
-static tt_entry_t * root;
-
-// ===================================================================
-// Helper declarations
-// ===================================================================
-
-void recurse_tree(tt_entry_t *n);
-void bubble_up(tt_entry_t *n);
-
-tt_entry_t *
-new_treap_node(const uint64_t key, const enum TT_FLAG flag,
-							 const uint8_t depth, const float value,
-							 const action_t action);
-
-
-// ===================================================================
-// Exported functions
-// ===================================================================
-
-int tt_init(void) {
-	root = NULL;
-	tt_num_cached = 0;
-	return EXIT_SUCCESS;
-}
-
-void tt_free(void) {
-	recurse_tree(root);
-	return;
-}
-
-tt_entry_t *tt_seek(const uint64_t key) {
-	if (root == NULL) return NULL;
-	tt_entry_t * n = root;
-
-	while (n != NULL && n->key != key) {
-		if (n->key > key) n = n->right;
-		else n = n->left;
-	}
-	return n;
-}
-
-int tt_insert(const uint64_t key, const enum TT_FLAG flag,
-							const uint8_t depth, const float value,
-							const action_t action) {
-	tt_entry_t *m = new_treap_node(key, flag, depth, value, action);
-	if (root == NULL) {
-		root = m;
-		tt_num_cached = 1;
-		return EXIT_SUCCESS;
-	}
-	tt_entry_t *s = root, *n = root;
-	// Find the correct position by doing a BST traversal
-	while (n!=NULL) {
-		s = n;
-		if (n->key >= key) n = n->right;
-		else n = n->left;
-	}
-	// Make it a leaf
-	if (s->key > key) s->right = m;
-	else s->left = m;
-	m->parent = s;
-	// Now bubble upward to satisfy the heap property
-	bubble_up(m);
-	tt_num_cached++;
-	return EXIT_SUCCESS;
-}
-
-// ===================================================================
-// Helper implementations
-// ===================================================================
-
-void recurse_tree(tt_entry_t *n) {
-	if (n==NULL) return;
-	if (n->left != NULL) recurse_tree(n->left);
-	if (n->right != NULL) recurse_tree(n->right);
-	free(n);
-}
-
-tt_entry_t *
-new_treap_node(const uint64_t key, const enum TT_FLAG flag,
-							 const uint8_t depth, const float value,
-							 const action_t action) {
-	tt_entry_t *n = malloc(sizeof(struct treap_node_s));
-	// TODO: trap
-	n->key = key;
-	n->flag = flag;
-	n->depth = depth;
-	n->value = value;
-	n->left = NULL;
-	n->right = NULL;
-	n->parent = NULL;
-	n->action = action;
-	XORSHIFT64; n->weight = RANDOM32;
-	return n;
-}
-
-void rotate_left(tt_entry_t *n) {
-	tt_entry_t *a = n->parent, *b = a->left, *c = n->left;
-	/*
-		We are the right child, so do this
-					 a           n
-					/ \         / \
-				 b   n  -->  a   d
-						/ \     / \
-					 c   d   b   c
-	*/
-	n->parent = a->parent;
-	// We may have to repair one level up as well
-	if (a->parent!=NULL) {
-		if (a->parent->left == a) a->parent->left = n;
-		else a->parent->right = n;
-	}
-	a->parent = n;
-	n->left = a; a->parent = n;
-	a->left = b; if (b!=NULL) b->parent = a;
-	a->right = c; if (c!=NULL) c->parent = a;
-}
-
-void rotate_right(tt_entry_t *n) {
-	tt_entry_t *a = n->parent, *b = a->right, *d = n->right;
-	 /*
-		 We are the left child, so do this
-				 a           n
-				/ \         / \
-			 n   b  -->  c   a
-			/ \             / \
-		 c   d           d   b
-	 */
-	n->parent = a->parent;
-	// We may have to repair one level up as well
-	if (a->parent!=NULL) {
-		if (a->parent->left == a) a->parent->left = n;
-		else a->parent->right = n;
-	}
-	a->parent = n;
-	n->right = a; a->parent = n;
-	a->left = d; if (d!=NULL) d->parent = a;
-	a->right = b; if (b!=NULL) b->parent = a;
-}
-
-//This preserves the BST quality of the treap
-void bubble_up(tt_entry_t *n) {
-	// Nothing to be done in this case
-	if (n==NULL || n->parent == NULL) return;
-	// Bubble until the treap invariants are satisfied
-	while (n->parent != NULL && n->weight < n->parent->weight) {
-		if (n->parent->left == n) rotate_right(n);
-		else rotate_left(n);
-	}
-	if (n->parent == NULL) root = n;
-}