--- libaitio/src/Attic/vars.c	2012/05/14 16:16:03	1.7
+++ libaitio/src/Attic/vars.c	2012/05/19 00:00:12	1.8
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: vars.c,v 1.7 2012/05/14 16:16:03 misho Exp $
+* $Id: vars.c,v 1.8 2012/05/19 00:00:12 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -477,7 +477,7 @@ io_allocVars(int varnum)
 	register int i;
 	ait_val_t *v;
 
-	if (!varnum || !(arr = io_arrayInit(varnum)))
+	if (!(arr = io_arrayInit(varnum)))
 		return NULL;
 
 	for (i = 0; i < io_arraySize(arr); i++) {
@@ -489,6 +489,42 @@ io_allocVars(int varnum)
 	}
 
 	return arr;
+}
+
+/*
+ * io_getVars() - Get ait_val_t element from array and if not exists allocate it
+ *
+ * @vars = Variable array
+ * @n = index of variable into array
+ * return: NULL error or !=NULL ait_val_t element
+ */
+inline ait_val_t *
+io_getVars(array_t ** __restrict vars, int n)
+{
+	register int i;
+	ait_val_t *v;
+
+	if (!vars)
+		return NULL;
+
+	if (!*vars) {
+		if (!(*vars = io_allocVars(n + 1)))
+			return NULL;
+	} else {
+		if (n >= (i = io_arraySize(*vars))) {
+			if (io_arrayGrow(*vars, n + 1, 0))
+				return NULL;
+			for (; i < io_arraySize(*vars); i++)
+				if (!io_arrayGet(*vars, i)) {
+					if (!(v = io_allocVar()))
+						return NULL;
+					else
+						io_arraySet(*vars, n, v);
+				}
+		}
+	}
+
+	return io_array(*vars, n, ait_val_t*);
 }
 
 /*