`M3DWrapper.h` is designed to omit the definition of `class M3DWrapper` if neither M3D import nor M3D export are compiled.
608bccd9cf touched the corresponding preprocessor checks and introduced a bug:
```
#ifndef ASSIMP_BUILD_NO_M3D_IMPORTER
#if !(ASSIMP_BUILD_NO_EXPORT || ASSIMP_BUILD_NO_M3D_EXPORTER)
class M3DWrapper {
```
When compiling
- with M3D import enabled,
- but with either export generally disabled or M3D export disabled specifically,
These checks evaluate to the wrong result and skip the definition, leading to a build failure in dependent code.
```
#if 1 // import enabled
#if !(1 || 1) // export disabled and M3D export disabled
```
This commit fixes the check to compile the definition if neither import is disabled.
While there is a 256 character limit when computing the length of the
newly allocated strength, that limit was missing when copying the
string. This commit adds a new length check in the copy loop, preventing
it from writhing out of bounds.
Fix https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34416
The search for a matching importer had a few issues, see #3791. There were two different mechanisms to determine whether an importer accepts a specific file extension:
1. `aiImporterDesc::mFileExtensions`, which was forwarded to the UI via `BaseImporter::GetExtensionList()`.
2. `BaseImporter::CanRead()` when called with `checkSig == false`, which determines whether to actually use that importer.
Both were redundant and got out of sync repeatedly. I removed 2. completely and replaced it with 1., thereby syncing UI/import and shortening all `BaseImporter::CanRead()` implementations.
Further bugfixes:
- fixed glTF2 importer throwing exceptions when checking whether it can load a file
- removed `BaseImporter::SimpleExtensionCheck()` because it is no longer used and had a bug with case sensitivity
Since the `checkSig` parameter in `BaseImporter::CanRead()` is now useless, it can be removed completely. I’m not sure if this would break ABI compatiblity, so I’ll submit it with a later pull request.
Krishty
Kim Kulling
Kim Kulling
Alex Rebert
IOhannes m zmölnig
kovacsv
Rahul Sheth
Aaron Gokaslan
Malcolm Tyrrell
Malcolm Tyrrell
Krishty
Jason C
contriteobserver
Guangmo Lin
Isuru2000psn
Sherief Farouk
MeyerFabian
RichardTea