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69 lines
1.9 KiB
69 lines
1.9 KiB
/* |
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* Copyright (C) 2016 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <hidl/HidlTransportUtils.h> |
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#include <android/hidl/base/1.0/IBase.h> |
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namespace android { |
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namespace hardware { |
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namespace details { |
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using ::android::hidl::base::V1_0::IBase; |
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Return<bool> canCastInterface(IBase* interface, const char* castTo, bool emitError) { |
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if (interface == nullptr) { |
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return false; |
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} |
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// b/68217907 |
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// Every HIDL interface is a base interface. |
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if (std::string(IBase::descriptor) == castTo) { |
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return true; |
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} |
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bool canCast = false; |
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auto chainRet = interface->interfaceChain([&](const hidl_vec<hidl_string> &types) { |
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for (size_t i = 0; i < types.size(); i++) { |
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if (types[i] == castTo) { |
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canCast = true; |
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break; |
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} |
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} |
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}); |
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if (!chainRet.isOk()) { |
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// call fails, propagate the error if emitError |
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return emitError |
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? details::StatusOf<void, bool>(chainRet) |
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: Return<bool>(false); |
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} |
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return canCast; |
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} |
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std::string getDescriptor(IBase* interface) { |
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std::string myDescriptor{}; |
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auto ret = interface->interfaceDescriptor([&](const hidl_string &types) { |
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myDescriptor = types.c_str(); |
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}); |
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ret.isOk(); // ignored, return empty string if not isOk() |
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return myDescriptor; |
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} |
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} // namespace details |
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} // namespace hardware |
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} // namespace android
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