46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
|
// Copyright 2015 The PDFium Authors
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#ifndef CORE_FXCRT_STL_UTIL_H_
|
||
|
|
#define CORE_FXCRT_STL_UTIL_H_
|
||
|
|
|
||
|
|
#include <memory>
|
||
|
|
|
||
|
|
#include "third_party/base/numerics/safe_conversions.h"
|
||
|
|
|
||
|
|
namespace fxcrt {
|
||
|
|
|
||
|
|
// Means of generating a key for searching STL collections of std::unique_ptr
|
||
|
|
// that avoids the side effect of deleting the pointer.
|
||
|
|
template <class T>
|
||
|
|
class FakeUniquePtr : public std::unique_ptr<T> {
|
||
|
|
public:
|
||
|
|
using std::unique_ptr<T>::unique_ptr;
|
||
|
|
~FakeUniquePtr() { std::unique_ptr<T>::release(); }
|
||
|
|
};
|
||
|
|
|
||
|
|
// Type-deducing wrapper for FakeUniquePtr<T>.
|
||
|
|
template <class T>
|
||
|
|
FakeUniquePtr<T> MakeFakeUniquePtr(T* arg) {
|
||
|
|
return FakeUniquePtr<T>(arg);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Convenience routine for "int-fected" code, so that the stl collection
|
||
|
|
// size_t size() method return values will be checked.
|
||
|
|
template <typename ResultType, typename Collection>
|
||
|
|
ResultType CollectionSize(const Collection& collection) {
|
||
|
|
return pdfium::base::checked_cast<ResultType>(collection.size());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Convenience routine for "int-fected" code, to handle signed indicies. The
|
||
|
|
// compiler can deduce the type, making this more convenient than the above.
|
||
|
|
template <typename IndexType, typename Collection>
|
||
|
|
bool IndexInBounds(const Collection& collection, IndexType index) {
|
||
|
|
return index >= 0 && index < CollectionSize<IndexType>(collection);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace fxcrt
|
||
|
|
|
||
|
|
#endif // CORE_FXCRT_STL_UTIL_H_
|