X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8faef7ccbc4b4e192da06de7e1a2a7f1dff7ec91..b404a8f3b072129c107c6d9a5e0f6f53cd34807b:/src/common/anidecod.cpp?ds=sidebyside

diff --git a/src/common/anidecod.cpp b/src/common/anidecod.cpp
index 9d202672c6..d0d0b6d75b 100644
--- a/src/common/anidecod.cpp
+++ b/src/common/anidecod.cpp
@@ -127,6 +127,11 @@ bool wxANIDecoder::DoCanRead(wxInputStream& stream) const
     wxInt32 anih32;
     memcpy( &anih32, "anih", 4 );
 
+    if ( stream.IsSeekable() && stream.SeekI(0) == wxInvalidOffset )
+    {
+        return false;
+    }
+
     if ( !stream.Read(&FCC1, 4) )
         return false;
 
@@ -220,6 +225,11 @@ bool wxANIDecoder::Load( wxInputStream& stream )
     wxInt32 seq32;
     memcpy( &seq32, "seq ", 4 );
 
+    if ( stream.IsSeekable() && stream.SeekI(0) == wxInvalidOffset )
+    {
+        return false;
+    }
+
     if ( !stream.Read(&FCC1, 4) )
         return false;
     if ( FCC1 != riff32 )