--- libaitio/src/aitio.c	2010/09/10 12:39:41	1.2
+++ libaitio/src/aitio.c	2011/02/10 19:45:07	1.2.2.2
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: aitio.c,v 1.2 2010/09/10 12:39:41 misho Exp $
+* $Id: aitio.c,v 1.2.2.2 2011/02/10 19:45:07 misho Exp $
 *
 *************************************************************************/
 #include "global.h"
@@ -354,3 +354,52 @@ end:
 	return cx;
 }
 
+
+/*
+ * ioVarAst() Function for evaluate string like asterisk variable "{text[:[-]#[:#]]}"
+ * @csString = Input string
+ * return: NULL error, !=NULL Allocated new string evaluated from input string, must be free()
+*/
+char *
+ioVarAst(const char *csString)
+{
+	char *ext, *str, *out = NULL;
+	int e[2] = { 0 };
+
+	if (!csString)
+		return NULL;
+
+	if (!strchr(csString, '{') || !strrchr(csString, '}')) {
+		memset(io_Error, 0, STRSIZ);
+		snprintf(io_Error, STRSIZ, "Error:: Invalid input string format ... "
+				"must be like {text[:[-]#[:#]]}");
+		io_Errno = EINVAL;
+		return NULL;
+	} else {
+		str = strdup(strchr(csString, '{') + 1);
+		*strrchr(str, '}') = 0;
+	}
+
+	if ((ext = strchr(str, ':'))) {
+		*ext++ = 0;
+		e[0] = strtol(ext, NULL, 0);
+		if ((ext = strchr(ext, ':')))
+			e[1] = strtol(++ext, NULL, 0);
+
+		/* make cut prefix */
+		if (e[0] >= 0)
+			ext = str + e[0];
+		else
+			ext = str + strlen(str) + e[0];
+		/* make cut suffix */
+		if (e[1] > 0)
+			*(ext + e[1]) = 0;
+	} else
+		/* ok, clear show */
+		ext = str;
+
+	out = strdup(ext);
+	free(str);
+
+	return out;
+}