update assimp to 6.0.5

Engine/lib/assimp/fuzz/fuzzer_common.h

@@ -0,0 +1,107 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2026, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+#pragma once
+
+#include <assimp/Importer.hpp>
+#include <assimp/BaseImporter.h>
+#include <assimp/importerdesc.h>
+#include <cstring>
+#include <vector>
+
+namespace AssimpFuzz {
+
+// Unregisters all loaders except the ones matching the given extension.
+// Returns true if at least one loader was kept.
+inline bool ForceFormat(Assimp::Importer& importer, const char* targetExtension) {
+    size_t count = importer.GetImporterCount();
+    std::vector<Assimp::BaseImporter*> toRemove;
+    bool found = false;
+
+    for (size_t i = 0; i < count; ++i) {
+        const aiImporterDesc* desc = importer.GetImporterInfo(i);
+        Assimp::BaseImporter* imp = importer.GetImporter(i);
+        
+        if (!desc || !imp) continue;
+
+        // Check if the importer supports the target extension
+        // mFileExtensions is a space-separated list (e.g., "obj mod")
+        // We wrap target in spaces or check bounds to be precise, 
+        // but for fuzzing, a simple strstr is usually sufficient 
+        // if the target string is unique enough (e.g. "gltf", "obj").
+        // A more robust check:
+        
+        bool isTarget = false;
+        const char* extList = desc->mFileExtensions;
+        if (!extList) {
+            toRemove.push_back(imp);
+            continue;
+        }
+        const size_t targetLen = strlen(targetExtension);
+
+        const char* p = extList;
+        while ((p = strstr(p, targetExtension)) != nullptr) {
+            // Check boundaries
+            const char prev = (p == extList) ? ' ' : *(p - 1);
+            const char next = *(p + targetLen);
+            
+            if (prev == ' ' && (next == ' ' || next == '\0')) {
+                isTarget = true;
+                break;
+            }
+            p++;
+        }
+
+        if (isTarget) {
+            found = true;
+        } else {
+            toRemove.push_back(imp);
+        }
+    }
+
+    for (auto* imp : toRemove) {
+        importer.UnregisterLoader(imp);
+        delete imp;  // Free the unregistered importer to prevent memory leaks
+    }
+
+    return found;
+}
+
+}