From 836963428eeadea57753b63789cbbbeb7b77d6c7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?= <zmoelnig@iem.at>
Date: Wed, 1 Dec 2021 11:16:48 +0100
Subject: [PATCH] Fix file-extension check for X3D-files

using the pre-existing and well-tested GetExtension() (which happens
to also normalize the extension), rather than attempting our own
buggy one...

Closes: https://github.com/assimp/assimp/issues/4177
---
 code/AssetLib/X3D/X3DImporter.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/code/AssetLib/X3D/X3DImporter.cpp b/code/AssetLib/X3D/X3DImporter.cpp
index e33782785..b8b9d250e 100644
--- a/code/AssetLib/X3D/X3DImporter.cpp
+++ b/code/AssetLib/X3D/X3DImporter.cpp
@@ -235,10 +235,8 @@ void X3DImporter::ParseFile(const std::string &file, IOSystem *pIOHandler) {
 
 bool X3DImporter::CanRead(const std::string &pFile, IOSystem * /*pIOHandler*/, bool checkSig) const {
     if (checkSig) {
-        std::string::size_type pos = pFile.find_last_of(".x3d");
-        if (pos != std::string::npos) {
+        if (GetExtension(pFile) == "x3d")
             return true;
-        }
     }
 
     return false;