| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
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| ** |
| ** This file is part of the QtGui module of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL21$ |
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| ****************************************************************************/ |
| |
| #ifndef QDATABUFFER_P_H |
| #define QDATABUFFER_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists for the convenience |
| // of other Qt classes. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include "QtCore/qbytearray.h" |
| |
| #include <stdlib.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| template <typename Type> class QDataBuffer |
| { |
| public: |
| QDataBuffer(int res) |
| { |
| capacity = res; |
| if (res) |
| buffer = (Type*) malloc(capacity * sizeof(Type)); |
| else |
| buffer = 0; |
| siz = 0; |
| } |
| |
| ~QDataBuffer() |
| { |
| if (buffer) |
| free(buffer); |
| } |
| |
| inline void reset() { siz = 0; } |
| |
| inline bool isEmpty() const { return siz==0; } |
| |
| inline int size() const { return siz; } |
| inline Type *data() const { return buffer; } |
| |
| inline Type &at(int i) { Q_ASSERT(i >= 0 && i < siz); return buffer[i]; } |
| inline const Type &at(int i) const { Q_ASSERT(i >= 0 && i < siz); return buffer[i]; } |
| inline Type &last() { Q_ASSERT(!isEmpty()); return buffer[siz-1]; } |
| inline const Type &last() const { Q_ASSERT(!isEmpty()); return buffer[siz-1]; } |
| inline Type &first() { Q_ASSERT(!isEmpty()); return buffer[0]; } |
| inline const Type &first() const { Q_ASSERT(!isEmpty()); return buffer[0]; } |
| |
| inline void add(const Type &t) { |
| reserve(siz + 1); |
| buffer[siz] = t; |
| ++siz; |
| } |
| |
| inline void pop_back() { |
| Q_ASSERT(siz > 0); |
| --siz; |
| } |
| |
| inline void resize(int size) { |
| reserve(size); |
| siz = size; |
| } |
| |
| inline void reserve(int size) { |
| if (size > capacity) { |
| if (capacity == 0) |
| capacity = 1; |
| while (capacity < size) |
| capacity *= 2; |
| buffer = (Type*) realloc(buffer, capacity * sizeof(Type)); |
| } |
| } |
| |
| inline void shrink(int size) { |
| capacity = size; |
| if (size) |
| buffer = (Type*) realloc(buffer, capacity * sizeof(Type)); |
| else { |
| free(buffer); |
| buffer = 0; |
| } |
| } |
| |
| inline void swap(QDataBuffer<Type> &other) { |
| qSwap(capacity, other.capacity); |
| qSwap(siz, other.siz); |
| qSwap(buffer, other.buffer); |
| } |
| |
| inline QDataBuffer &operator<<(const Type &t) { add(t); return *this; } |
| |
| private: |
| int capacity; |
| int siz; |
| Type *buffer; |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QDATABUFFER_P_H |