/*
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* Copyright (C) 2011 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 "signature-inl.h"
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#include <string.h>
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#include <ostream>
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#include <type_traits>
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#include "base/string_view_cpp20.h"
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namespace art {
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using dex::TypeList;
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std::string Signature::ToString() const {
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if (dex_file_ == nullptr) {
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CHECK(proto_id_ == nullptr);
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return "<no signature>";
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}
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const TypeList* params = dex_file_->GetProtoParameters(*proto_id_);
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std::string result;
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if (params == nullptr) {
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result += "()";
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} else {
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result += "(";
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for (uint32_t i = 0; i < params->Size(); ++i) {
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result += dex_file_->StringByTypeIdx(params->GetTypeItem(i).type_idx_);
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}
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result += ")";
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}
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result += dex_file_->StringByTypeIdx(proto_id_->return_type_idx_);
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return result;
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}
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uint32_t Signature::GetNumberOfParameters() const {
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const TypeList* params = dex_file_->GetProtoParameters(*proto_id_);
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return (params != nullptr) ? params->Size() : 0;
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}
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bool Signature::IsVoid() const {
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const char* return_type = dex_file_->GetReturnTypeDescriptor(*proto_id_);
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return strcmp(return_type, "V") == 0;
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}
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bool Signature::operator==(std::string_view rhs) const {
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if (dex_file_ == nullptr) {
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return false;
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}
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std::string_view tail(rhs);
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if (!StartsWith(tail, "(")) {
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return false; // Invalid signature
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}
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tail.remove_prefix(1); // "(";
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const TypeList* params = dex_file_->GetProtoParameters(*proto_id_);
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if (params != nullptr) {
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for (uint32_t i = 0; i < params->Size(); ++i) {
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std::string_view param(dex_file_->StringByTypeIdx(params->GetTypeItem(i).type_idx_));
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if (!StartsWith(tail, param)) {
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return false;
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}
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tail.remove_prefix(param.length());
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}
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}
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if (!StartsWith(tail, ")")) {
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return false;
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}
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tail.remove_prefix(1); // ")";
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return tail == dex_file_->StringByTypeIdx(proto_id_->return_type_idx_);
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}
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std::ostream& operator<<(std::ostream& os, const Signature& sig) {
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return os << sig.ToString();
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}
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} // namespace art
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