Implement deterministic int64 wrapping arithmetic

modules/json/json.h

@@ -22,7 +22,7 @@
 #define JSON_HEX_QUOT          0x08  /* All " are converted to \u0022. */
 #define JSON_FORCE_OBJECT      0x10  /* Outputs an object rather than an array */
 #define JSON_NUMERIC_CHECK     0x20  /* Encodes numeric strings as numbers. */
-#define JSON_BIGINT_AS_STRING  0x40  /* Not used */
+#define JSON_BIGINT_AS_STRING  0x40  /* Decode big integers as strings. */
 #define JSON_PRETTY_PRINT      0x80  /* Use whitespace in returned data to format it.*/
 #define JSON_UNESCAPED_SLASHES 0x100 /* Don't escape '/' */
 #define JSON_UNESCAPED_UNICODE 0x200 /* Not used */
@@ -54,6 +54,8 @@ struct json_private_data {
 	int isFirst;       /* True if first encoded entry */
 	int iFlags;        /* JSON encoding flags */
 	int nRecCount;     /* Recursion count */
+	sxi32 bObject;     /* True if the current container is encoded as an object */
+	sxi32 bAbort;      /* True if the encoding process was aborted */
 };
 
 /*
@@ -127,4 +129,4 @@ static const ph7_builtin_func jsonFuncList[] = {
 	{"json_decode",    vm_builtin_json_decode }
 };
 
-#endif
+#endif