X-Git-Url: https://git.llucax.com/z.facultad/75.52/treemulator.git/blobdiff_plain/2c1d3ea3cf9a25e8f957587d4a1581fc292c831b..828f81aa63714ca38457a87ec77e77da72cd82b9:/src/btree.cpp

diff --git a/src/btree.cpp b/src/btree.cpp
index cf01b2c..fc0a5e9 100644
--- a/src/btree.cpp
+++ b/src/btree.cpp
@@ -6,7 +6,7 @@ BTree::BTree (const std::string &name, unsigned int block_size, bool create_new_
 	uchar *node;
 	BTreeNodeHeader nh;
 
-	fp = fopen (name.c_str(), "wb");
+	fp = fopen (name.c_str(), "wb+");
 	if (!fp) {
 		/* TODO : mandar una exception ? */
 		return;
@@ -55,7 +55,7 @@ void BTree::AddKey (const Clave &k)
 
 Clave* BTree::AddKeyR (const Clave *k, uint node_num)
 {
-	Clave *kout;
+	Clave *kout = NULL;
 	std::list<BTreeData> node_keys;
 
 	/* Leo el nodo raiz para empezar a agregar */
@@ -63,22 +63,47 @@ Clave* BTree::AddKeyR (const Clave *k, uint node_num)
 	BTreeNodeHeader node_header;
 	ReadNodoHeader (node, &node_header);
 
-	node_keys = ReadKeys (node, node_header);
-	
-	if (node_header.free_space >= k->Size ()) {
+	if (node_header.level != 0) {
+		/* No estoy en una hoja, asi que tengo que buscar
+		 * para donde moverme para agregar la clave
+		 */
+		/* TODO :) */
+	}
+
+
+	/* Estoy en una hoja, veo si lo puedo agregar */
+	BTreeLeafData data (k->Clone ());
+
+	if (node_header.free_space > data.Size ()) {
 		/* TODO : Insertar ordenado */
-		//node_keys.push_back (BTreek->Clone ());
+		BTreeData datait;
+
+		node_keys = ReadKeys (node, node_header);
+		std::list<BTreeData>::iterator it = node_keys.begin ();
+
+		while (it != node_keys.end ()) {
+			datait = (*it);
+			if (data < datait)
+				/* Me pase, lo agrego aca! */
+				break;
+		}
+		node_keys.insert (it, data);
+		WriteKeys (node, node_header, node_keys);
+		WriteNodoHeader (node, &node_header);
+		WriteBlock (node, node_num);
+
+		PrintNode (node_num);
 	} else {
 		/* Split */
+		/* Lo que debe pasar :
+		 *  1) Separar N/2 claves en "nodo"
+		 *  2) Separar N/2-1 claves en un nuevo nodo
+		 *  3) kout = clave del medio y mandarla al padre
+		 */
+		std::cout << "SPLIT" << std::endl;
+		delete [] node;
 	}
 
-	
-	WriteKeys (node, node_header, node_keys);
-	WriteNodoHeader (node, &node_header);
-	WriteBlock (node, node_num);
-
-	delete [] node;
-
 	return kout;
 }
 
@@ -115,7 +140,11 @@ std::list<BTreeData> BTree::ReadKeys (uchar *node, BTreeNodeHeader &node_header)
 		 * arbol
 		 */
 		/* TODO : Detectar si estoy en una hoja */
-		BTreeData data(node);
+		BTreeData data;
+		if (node_header.level == 0)
+			data = BTreeLeafData (node);
+		else
+			data = BTreeData (node);
 		node += data.Size ();
 		keys.push_back (data);
 	}
@@ -129,12 +158,37 @@ void BTree::WriteKeys (uchar *node, BTreeNodeHeader &node_header, std::list<BTre
 
 	node += sizeof (BTreeNodeHeader);
 
+	node_header.item_count = 0;
+	node_header.free_space = header.block_size - sizeof (BTreeNodeHeader);
+
 	while (it != keys.end ()) {
 		BTreeData d = (*it);
 		memcpy (node, d.ToArray(), d.Size ());
 		node += d.Size ();
+		node_header.free_space -= d.Size ();
+		node_header.item_count++;
 		it++;
 	}
 
 	/* TODO : incrementar node_header.item_count aca o fuera de este metodo? */
 }
+		
+void BTree::PrintNode (uint num)
+{
+	uchar *node = ReadBlock (num);
+	BTreeNodeHeader node_header;
+	ReadNodoHeader (node, &node_header);
+		
+	std::list<BTreeData> node_keys = ReadKeys (node, node_header);
+	std::list<BTreeData>::iterator it = node_keys.begin ();
+
+	std::cout << "Nodo  : " << num << std::endl;
+	std::cout << "Items : " << node_header.item_count << std::endl;
+	std::cout << "Free  : " << node_header.free_space << " (" << (header.block_size - sizeof (BTreeNodeHeader)) << ")" << std::endl;
+	while (it != node_keys.end ()) {
+		std::string s = (*it);
+		std::cout << "(" << s << ") "; 
+	}
+	std::cout << std::endl;
+}
+