Start making structs for the children. Addresses #126.

git-svn-id: file:///svn/tokudb@957 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/brt-internal.h

@@ -25,6 +25,22 @@ enum { BUFFER_HEADER_SIZE = (4 // height//
 			     + 4 // n_children
 			     + TREE_FANOUT * 8 // children
 			     ) };
+
+struct brtnode_nonleaf_pivotinfo {
+    struct kv_pair *pivotkey; /* For DUPSORT keys, the keys are whole key-value pairs.
+			       * For nonduplicate and DUPSORT keys we have
+			       *  Child 0's keys <= pivotkey[0] < Child 1's keys <= pivotkey[1] < ...  pivotkey[N-1] < child N's keys <= pivotkey[N] ...
+			       */
+    unsigned char pivotflags;
+};
+struct brtnode_nonleaf_childinfo {
+    u_int32_t    subtree_fingerprint;
+    DISKOFF      diskoff;
+    HASHTABLE    htable;
+    unsigned int n_bytes_in_hashtable; /* How many bytes are in each hashtable (including overheads for the disk-representation) */
+    unsigned int n_cursors;
+};
+
 typedef struct brtnode *BRTNODE;
 /* Internal nodes. */
 struct brtnode {
@@ -44,19 +60,26 @@ struct brtnode {
 	struct nonleaf {
 	    // Don't actually store the subree fingerprint in the in-memory data structure.
 	    int             n_children;  /* if n_children==TREE_FANOUT+1 then the tree needs to be rebalanced. */
+	    unsigned int    totalchildkeylens;
+	    unsigned int    n_bytes_in_hashtables;
+
+//#define CHSTRUCT
+#ifdef CHSTRUCT
+	    struct brtnode_nonleaf_pivotinfo pivots[TREE_FANOUT]; /* One extra one so we can grow. */
+	    struct brtnode_nonleaf_childinfo children[TREE_FANOUT+1]; /* One extra so we can grow */
+#else
 	    u_int32_t       child_subtree_fingerprints[TREE_FANOUT+1];
 	    struct kv_pair *childkeys[TREE_FANOUT];   /* Pivot keys.  Child 0's keys are <= childkeys[0].  Child 1's keys are <= childkeys[1].
 							 Note: It is possible that Child 1's keys are == to child 0's key's, so it is
 							 not necessarily true that child 1's keys are > childkeys[0].
 						         However, in the absense of duplicate keys, child 1's keys *are* > childkeys[0]. */
 	    unsigned int    childkeylens[TREE_FANOUT];
-	    unsigned int    totalchildkeylens;
 	    unsigned char   pivotflags[TREE_FANOUT];
 	    DISKOFF         children[TREE_FANOUT+1];  /* unused if height==0 */   /* Note: The last element of these arrays is used only temporarily while splitting a node. */
 	    HASHTABLE       htables[TREE_FANOUT+1];
 	    unsigned int    n_bytes_in_hashtable[TREE_FANOUT+1]; /* how many bytes are in each hashtable (including overheads) */
-	    unsigned int    n_bytes_in_hashtables;
 	    unsigned int    n_cursors[TREE_FANOUT+1];
+#endif
         } n;
 	struct leaf {
 	    PMA buffer;