(barely) hide AVL internals

include/avl.h

@@ -32,12 +32,15 @@
 
 LDAP_BEGIN_DECL
 
-typedef struct avlnode {
+typedef struct avlnode Avlnode;
+
+#ifdef AVL_INTERNAL
+struct avlnode {
 	void*		avl_data;
 	signed char		avl_bf;
 	struct avlnode	*avl_left;
 	struct avlnode	*avl_right;
-} Avlnode;
+};
 
 #define NULLAVL	((Avlnode *) NULL)
 
@@ -45,6 +48,7 @@ typedef struct avlnode {
 #define LH 	(-1)
 #define EH 	0
 #define RH 	1
+#endif
 
 /* avl routines */
 #define avl_getone(x)	((x) == 0 ? 0 : (x)->avl_data)

libraries/libavl/avl.c

@@ -21,6 +21,7 @@ static char avl_version[] = "AVL library version 1.0\n";
 #include <stdio.h>
 #include <stdlib.h>
 
+#define AVL_INTERNAL
 #include "avl.h"
 
 #define ROTATERIGHT(x)	{ \

libraries/libavl/testavl.c

@@ -7,6 +7,7 @@
 
 #include <ac/string.h>
 
+#define AVL_INTERNAL
 #define AVL_NONREENTRANT 
 #include "avl.h"
 
@@ -16,7 +17,7 @@ static void myprint LDAP_P(( Avlnode *root ));
 int
 main( int argc, char **argv )
 {
-	Avlnode	*tree = NULLAVL;
+	Avlnode	*tree = NULL;
 	char	command[ 10 ];
 	char	name[ 80 ];
 	char	*p;
@@ -26,7 +27,7 @@ main( int argc, char **argv )
 		switch( *command ) {
 		case 'n':	/* new tree */
 			( void ) avl_free( tree, (AVL_FREE) free );
-			tree = NULLAVL;
+			tree = NULL;
 			break;
 		case 'p':	/* print */
 			( void ) myprint( tree );