Check ftell() result for error code before using it.
diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index 25691b9..a6ad63a 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -1695,9 +1695,14 @@
}
fseek( fp, 0, SEEK_END );
- size_t size = ftell( fp );
+ const long filelength = ftell( fp );
fseek( fp, 0, SEEK_SET );
+ if ( filelength == -1L ) {
+ SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );
+ return _errorID;
+ }
+ const size_t size = filelength;
if ( size == 0 ) {
SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0 );
return _errorID;