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/*
* Copyright (C) 2022 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_RUNTIME_NATIVE_STRING_ARRAY_UTILS_H_
#define ART_RUNTIME_NATIVE_STRING_ARRAY_UTILS_H_
#include "base/locks.h"
#include "class_root-inl.h"
#include "handle_scope-inl.h"
#include "mirror/object_array-alloc-inl.h"
#include "mirror/string.h"
namespace art {
namespace detail {
inline const char* GetStringCStr(const char* str) { return str; }
inline const char* GetStringCStr(const std::string& str) { return str.c_str(); }
} // namespace detail
template <typename Container>
ObjPtr<mirror::ObjectArray<mirror::String>> CreateStringArray(
Thread* self, size_t size, const Container& entries) REQUIRES_SHARED(Locks::mutator_lock_) {
StackHandleScope<1u> hs(self);
Handle<mirror::ObjectArray<mirror::String>> array = hs.NewHandle(
mirror::ObjectArray<mirror::String>::Alloc(
self, GetClassRoot<mirror::ObjectArray<mirror::String>>(), size));
if (array == nullptr) {
DCHECK(self->IsExceptionPending());
return nullptr;
}
// Note: If the container's iterator returns a `std::string` by value, the `auto&&`
// binds as a const reference and extends the lifetime of the temporary object.
size_t pos = 0u;
for (auto&& entry : entries) {
ObjPtr<mirror::String> oentry =
mirror::String::AllocFromModifiedUtf8(self, detail::GetStringCStr(entry));
if (oentry == nullptr) {
DCHECK(self->IsExceptionPending());
return nullptr;
}
// We're initializing a newly allocated array object, so we do not need to record that under
// a transaction. If the transaction is aborted, the whole object shall be unreachable.
DCHECK_LT(pos, size);
array->SetWithoutChecks</*kTransactionActive=*/ false, /*kCheckTransaction=*/ false>(
pos, oentry);
++pos;
}
DCHECK_EQ(pos, size);
return array.Get();
}
template <typename Container>
ObjPtr<mirror::ObjectArray<mirror::String>> CreateStringArray(
Thread* self, const Container& entries) REQUIRES_SHARED(Locks::mutator_lock_) {
return CreateStringArray(self, entries.size(), entries);
}
inline ObjPtr<mirror::ObjectArray<mirror::String>> CreateStringArray(
Thread* self, std::initializer_list<const char*> entries)
REQUIRES_SHARED(Locks::mutator_lock_) {
return CreateStringArray<std::initializer_list<const char*>>(self, entries);
}
} // namespace art
#endif // ART_RUNTIME_NATIVE_STRING_ARRAY_UTILS_H_
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