--- libelwix/src/json.c	2024/12/04 17:47:28	1.11
+++ libelwix/src/json.c	2025/08/21 15:41:26	1.11.2.2
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: json.c,v 1.11 2024/12/04 17:47:28 misho Exp $
+* $Id: json.c,v 1.11.2.2 2025/08/21 15:41:26 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -12,7 +12,7 @@ terms:
 All of the documentation and software included in the ELWIX and AITNET
 Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
 
-Copyright 2004 - 2024
+Copyright 2004 - 2025
 	by Michael Pounov <misho@elwix.org>.  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -597,7 +597,7 @@ json_findbykey(const char *jstr, const char *key, jtyp
  * @type = Search key for particular token type, if is J_UNDEF this mean any type
  * @toks = Parsed tokens
  * @toksnum = Number of parsed tokens
- * return: =NULL error or !=NULL data token found 
+ * return: =NULL error or !=NULL data token found
  */
 jtok_t *
 json_findbykeyatscope(long scope, const char *jstr, const char *key, jtype_t type, jtok_t * __restrict toks, int toksnum)
@@ -1325,4 +1325,40 @@ json_objscope(const char *key, const char *jstr, jtok_
 			}
 
 	return scope;
+}
+
+/*
+ * json_validate() - Validate JSON
+ *
+ * @jstr = JSON string
+ * return: -1 error or >=0 where valid JSON ends
+ */
+int
+json_validate(const char *jstr)
+{
+	register int o = 0, a = 0, pos = 0;
+
+	while (isspace(jstr[pos]) || jstr[pos] != '{')
+		pos++;
+
+	do {
+		switch (jstr[pos++]) {
+			case '{':
+				o++;
+				break;
+			case '}':
+				o--;
+				break;
+			case '[':
+				a++;
+				break;
+			case ']':
+				a--;
+				break;
+			case 0:	/* string ends without valid JSON */
+				return 0;
+		}
+	} while (a || o);
+
+	return pos;
 }