comments in php_json_scanner.h

ext/json/php_json_scanner.h

@@ -29,14 +29,14 @@ typedef struct _php_json_scanner {
 	php_json_ctype *marker;         /* marker position for backtracking */
 	php_json_ctype *ctxmarker;      /* marker position for context backtracking */
 	php_json_ctype *str_start;      /* start position of the string */
-	php_json_ctype *input_start;      /* start position of the string */
+	php_json_ctype *input_start;    /* start position of the string */
 	php_json_ctype *pstr;           /* string pointer for escapes conversion */
 	zval value;                     /* value */
 	int str_esc;                    /* number of extra characters for escaping */
 	int state;                      /* condition state */
 	int options;                    /* options */
 	php_json_error_code errcode;    /* error type if there is an error */
-	size_t errpos;
+	size_t errpos;                  /* holds the aprox character number when an error occurs */
 	int utf8_invalid;               /* whether utf8 is invalid */
 	int utf8_invalid_count;         /* number of extra character for invalid utf8 */
 } php_json_scanner;