| /* |
| * Copyright (C) 2016 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 GAPIC_VECTOR_H |
| #define GAPIC_VECTOR_H |
| |
| #include "assert.h" |
| |
| #include <stdint.h> |
| |
| namespace gapic { |
| |
| // Vector is a fixed-capacity container of plain-old-data elements of type T. |
| // Do not use elements that require destruction in this container. |
| template<typename T> |
| class Vector { |
| public: |
| // Default constructor. |
| // Vector is unusable until it is assigned from a Vector constructed using one of the other |
| // constructors. |
| Vector(); |
| |
| // Constructs a vector pre-sized to count and with the first element at the specified address. |
| // The vector's capacity is fixed to count. |
| Vector(T* first, size_t count); |
| |
| // Constructs a vector pre-sized to count and with the first element at the specified address. |
| // The vector's capacity is fixed to capacity. |
| Vector(T* first, size_t count, size_t capacity); |
| |
| // clear sets the vector count to 0. |
| inline void clear(); |
| |
| // append grows the vector by 1 by appending el to the end of the vector. |
| // It is a fatal error if the vector has no more capacity. |
| inline void append(const T& el); |
| |
| // append grows the vector and appends all elements from the other vector. |
| // It is a fatal error if the vector has no more capacity. |
| inline void append(const Vector<T>& other); |
| |
| // data returns the pointer to the first element in the vector. |
| // If the vector is empty, then data returns nullptr. |
| inline T* data() const; |
| |
| // count returns the number of elements in the vector. |
| inline size_t count() const; |
| |
| // Returns a reference to a single element in the slice. |
| inline T& operator[](size_t index) const; |
| |
| // Support for range-based for looping |
| inline T* begin() const; |
| inline T* end() const; |
| |
| private: |
| T* mBase; // Address of the first element in the vector. |
| size_t mCapacity; // Maximum number of elements this vector can hold. |
| size_t mCount; // Number of elements in the vector. |
| }; |
| |
| template<typename T> |
| Vector<T>::Vector() |
| : mBase(nullptr) |
| , mCapacity(0) |
| , mCount(0) |
| {} |
| |
| template<typename T> |
| Vector<T>::Vector(T* first, size_t count) |
| : mBase(first) |
| , mCapacity(count) |
| , mCount(count) {} |
| |
| template<typename T> |
| Vector<T>::Vector(T* first, size_t count, size_t capacity) |
| : mBase(first) |
| , mCapacity(capacity) |
| , mCount(count) { |
| GAPID_ASSERT(count <= capacity); |
| } |
| |
| template<typename T> |
| inline void Vector<T>::clear() { |
| mCount = 0; |
| } |
| |
| template<typename T> |
| inline void Vector<T>::append(const T& el) { |
| GAPID_ASSERT(mCount < mCapacity); |
| new(&mBase[mCount]) T(el); |
| mCount++; |
| } |
| |
| template<typename T> |
| inline void Vector<T>::append(const Vector<T>& other) { |
| for (auto it : other) { |
| append(it); |
| } |
| } |
| |
| template<typename T> |
| inline T* Vector<T>::data() const { |
| return mCount > 0 ? mBase : nullptr; |
| } |
| |
| template<typename T> |
| inline size_t Vector<T>::count() const { |
| return mCount; |
| } |
| |
| // Returns a reference to a single element in the slice. |
| template<typename T> |
| inline T& Vector<T>::operator[](size_t index) const { |
| GAPID_ASSERT(index < mCount); |
| return mBase[index]; |
| } |
| |
| // Support for range-based for looping |
| template<typename T> |
| inline T* Vector<T>::begin() const { |
| return mBase; |
| } |
| |
| template<typename T> |
| inline T* Vector<T>::end() const { |
| return mBase + mCount; |
| } |
| |
| } // namespace gapic |
| |
| #endif // GAPIC_VECTOR_H |