Agrego posibiliad de abrir un arbol desde un archivo.

diff --git a/src/btree.cpp b/src/btree.cpp
index 6771746f1971b7b7aa8aa61ece6f580c01c52b01..0ad4961a83c0b3037c949156e408eca492c7a1f9 100644 (file)
--- a/src/btree.cpp
+++ b/src/btree.cpp
@@ -33,11 +33,27 @@ BTree::BTree (const std::string &name, unsigned int block_size, int tt, int kt,
        delete [] node;
 }
 
+BTree::BTree (const std::string &name)
+{
+       fp = fopen (name.c_str(), "rb+");
+       if (!fp) {
+               /* TODO : mandar una exception ? */
+               return;
+       }
+       ReadFileHeader ();
+}
+
 BTree::~BTree ()
 {
        fclose (fp);
 }
 
+void BTree::ReadFileHeader ()
+{
+       fseek (fp, 0L, SEEK_SET);
+       fread (&header, 1, sizeof (BTreeFileHeader), fp);
+}
+
 void BTree::WriteFileHeader ()
 {
        fseek (fp, 0L, SEEK_SET);

diff --git a/src/btree.h b/src/btree.h
index 3860d385e1e88cf0f488eae73a879ca9e3d8aa9a..6feb5a8e3b700026d9d5bdafaadc97f073c5f5a9 100644 (file)
--- a/src/btree.h
+++ b/src/btree.h
@@ -249,6 +249,8 @@ struct BTreeFindResult {
 class BTree {
        public:
                BTree (const std::string &filename, unsigned int block_size, int t_t = TYPE_IDENTIFICACION, int k_t = KEY_FIXED, bool create_new_file = false);
+               BTree (const std::string &filename);
+
                ~BTree ();
 
                /** Tipos de clave a usar */
@@ -294,6 +296,7 @@ class BTree {
 
                /* Funciones de manejo de archivo */
                void WriteFileHeader ();
+               void ReadFileHeader ();
 
                /* Manejo de Bloques */
                void WriteBlock (uchar *block, uint num);