You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
3.6 KiB
92 lines
3.6 KiB
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef ART_LIBDEXFILE_DEX_METHOD_REFERENCE_H_
|
|
#define ART_LIBDEXFILE_DEX_METHOD_REFERENCE_H_
|
|
|
|
#include <stdint.h>
|
|
#include <string>
|
|
#include "dex/dex_file.h"
|
|
#include "dex/dex_file_reference.h"
|
|
|
|
namespace art {
|
|
|
|
// A method is uniquely located by its DexFile and the method_ids_ table index into that DexFile
|
|
class MethodReference : public DexFileReference {
|
|
public:
|
|
MethodReference(const DexFile* file, uint32_t index) : DexFileReference(file, index) {}
|
|
std::string PrettyMethod(bool with_signature = true) const {
|
|
return dex_file->PrettyMethod(index, with_signature);
|
|
}
|
|
const dex::MethodId& GetMethodId() const {
|
|
return dex_file->GetMethodId(index);
|
|
}
|
|
};
|
|
|
|
// Compare the actual referenced method signatures. Used for method reference deduplication.
|
|
struct MethodReferenceValueComparator {
|
|
bool operator()(MethodReference mr1, MethodReference mr2) const {
|
|
if (mr1.dex_file == mr2.dex_file) {
|
|
DCHECK_EQ(mr1.index < mr2.index, SlowCompare(mr1, mr2));
|
|
return mr1.index < mr2.index;
|
|
} else {
|
|
return SlowCompare(mr1, mr2);
|
|
}
|
|
}
|
|
|
|
bool SlowCompare(MethodReference mr1, MethodReference mr2) const {
|
|
// The order is the same as for method ids in a single dex file.
|
|
// Compare the class descriptors first.
|
|
const dex::MethodId& mid1 = mr1.GetMethodId();
|
|
const dex::MethodId& mid2 = mr2.GetMethodId();
|
|
int descriptor_diff = strcmp(mr1.dex_file->StringByTypeIdx(mid1.class_idx_),
|
|
mr2.dex_file->StringByTypeIdx(mid2.class_idx_));
|
|
if (descriptor_diff != 0) {
|
|
return descriptor_diff < 0;
|
|
}
|
|
// Compare names second.
|
|
int name_diff = strcmp(mr1.dex_file->GetMethodName(mid1), mr2.dex_file->GetMethodName(mid2));
|
|
if (name_diff != 0) {
|
|
return name_diff < 0;
|
|
}
|
|
// And then compare proto ids, starting with return type comparison.
|
|
const dex::ProtoId& prid1 = mr1.dex_file->GetProtoId(mid1.proto_idx_);
|
|
const dex::ProtoId& prid2 = mr2.dex_file->GetProtoId(mid2.proto_idx_);
|
|
int return_type_diff = strcmp(mr1.dex_file->StringByTypeIdx(prid1.return_type_idx_),
|
|
mr2.dex_file->StringByTypeIdx(prid2.return_type_idx_));
|
|
if (return_type_diff != 0) {
|
|
return return_type_diff < 0;
|
|
}
|
|
// And finishing with lexicographical parameter comparison.
|
|
const dex::TypeList* params1 = mr1.dex_file->GetProtoParameters(prid1);
|
|
size_t param1_size = (params1 != nullptr) ? params1->Size() : 0u;
|
|
const dex::TypeList* params2 = mr2.dex_file->GetProtoParameters(prid2);
|
|
size_t param2_size = (params2 != nullptr) ? params2->Size() : 0u;
|
|
for (size_t i = 0, num = std::min(param1_size, param2_size); i != num; ++i) {
|
|
int param_diff = strcmp(mr1.dex_file->StringByTypeIdx(params1->GetTypeItem(i).type_idx_),
|
|
mr2.dex_file->StringByTypeIdx(params2->GetTypeItem(i).type_idx_));
|
|
if (param_diff != 0) {
|
|
return param_diff < 0;
|
|
}
|
|
}
|
|
return param1_size < param2_size;
|
|
}
|
|
};
|
|
|
|
} // namespace art
|
|
|
|
#endif // ART_LIBDEXFILE_DEX_METHOD_REFERENCE_H_
|