| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_ |
| #define PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_ |
| |
| #include <vector> |
| |
| namespace pdfium { |
| |
| // To treat a possibly-empty vector as an array, use these functions. |
| // If you know the array will never be empty, you can use &*v.begin() |
| // directly, but that is undefined behaviour if |v| is empty. |
| template <typename T> |
| inline T* vector_as_array(std::vector<T>* v) { |
| return v->empty() ? nullptr : &*v->begin(); |
| } |
| |
| template <typename T> |
| inline const T* vector_as_array(const std::vector<T>* v) { |
| return v->empty() ? nullptr : &*v->begin(); |
| } |
| |
| } // namespace pdfium |
| |
| #endif // PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_ |