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Clean up IPluginFactory::createInstance()

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We'll just do all the checks up front, that's much cleaner and also
safer.
This commit is contained in:
Robbert van der Helm
2020-12-19 13:01:14 +01:00
parent fa256ab9be
commit a197ad897c
1 changed files with 9 additions and 11 deletions
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src/plugin/bridges/vst3-impls/plugin-factory.cpp
+9 -11
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@@ -28,18 +28,20 @@ tresult PLUGIN_API
YaPluginFactoryImpl::createInstance(Steinberg::FIDString cid,
Steinberg::FIDString _iid,
void** obj) {
if (!_iid || !cid) {
constexpr size_t uid_size = sizeof(Steinberg::TUID);
if (!cid || !_iid || strnlen(cid, uid_size) < uid_size ||
strnlen(_iid, uid_size) < uid_size) {
return Steinberg::kInvalidArgument;
}
ArrayUID cid_array;
std::copy(cid, cid + sizeof(Steinberg::TUID), cid_array.begin());
std::copy(cid, cid + std::extent_v<Steinberg::TUID>, cid_array.begin());
// FIXME: `_iid` in Bitwig Studio 3.3.1 is not null terminated, and the
// comparison below will thus fail since the strings have different
// lengths. We'll temporarily work around this, and if this end sup
// not being us doing something strange then we should report it.
constexpr size_t uid_size = sizeof(Steinberg::TUID);
// lengths. Since it looks like the module implementation that comes
// with the SDK has this same issue I think it might just be a case
// of Steinberg not following its own specifications.
std::string iid_string(_iid, uid_size);
Vst3PluginProxy::Construct::Interface requested_interface;
@@ -55,12 +57,8 @@ YaPluginFactoryImpl::createInstance(Steinberg::FIDString cid,
// print a recognizable log message. I don't think they include a safe
// way to convert a `FIDString/char*` into a `FUID`, so this will have
// to do.
std::optional<Steinberg::FUID> uid;
if (_iid && strnlen(_iid, uid_size) >= uid_size) {
uid = Steinberg::FUID::fromTUID(
*reinterpret_cast<const Steinberg::TUID*>(&*_iid));
}
const Steinberg::FUID uid = Steinberg::FUID::fromTUID(
*reinterpret_cast<const Steinberg::TUID*>(&*_iid));
bridge.logger.log_unknown_interface(
"In IPluginFactory::createInstance()", uid);