1 // Copyright 2017 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef CORE_FXCRT_CFX_FIXEDBUFGROW_H_ 8 #define CORE_FXCRT_CFX_FIXEDBUFGROW_H_ 9 10 #include <memory> 11 12 #include "core/fxcrt/fx_memory.h" 13 14 template <class DataType, int FixedSize> 15 class CFX_FixedBufGrow { 16 public: CFX_FixedBufGrow(int data_size)17 explicit CFX_FixedBufGrow(int data_size) { 18 if (data_size > FixedSize) { 19 m_pGrowData.reset(FX_Alloc(DataType, data_size)); 20 return; 21 } 22 memset(m_FixedData, 0, sizeof(DataType) * FixedSize); 23 } 24 operator DataType*() { return m_pGrowData ? m_pGrowData.get() : m_FixedData; } 25 26 private: 27 DataType m_FixedData[FixedSize]; 28 std::unique_ptr<DataType, FxFreeDeleter> m_pGrowData; 29 }; 30 31 #endif // CORE_FXCRT_CFX_FIXEDBUFGROW_H_ 32