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74 lines
2.0 KiB
74 lines
2.0 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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if (interface == nullptr) {
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return "";
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}
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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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