1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #ifndef _FIXED_BUFFER_H 17 #define _FIXED_BUFFER_H 18 19 #if PLATFORM_SDK_VERSION < 26 20 #include <cutils/log.h> 21 #else 22 #include <log/log.h> 23 #endif 24 25 class FixedBuffer { 26 public: 27 FixedBuffer(size_t initialSize = 0) { 28 m_buffer = NULL; 29 m_bufferLen = initialSize; 30 alloc(m_bufferLen); 31 } 32 ~FixedBuffer()33 ~FixedBuffer() { 34 delete [] m_buffer; 35 m_bufferLen = 0; 36 } 37 alloc(size_t size)38 void * alloc(size_t size) { 39 if (m_bufferLen >= size) 40 return (void *)(m_buffer); 41 42 if (m_buffer != NULL) 43 delete[] m_buffer; 44 45 m_bufferLen = size; 46 m_buffer = new unsigned char[m_bufferLen]; 47 if (m_buffer == NULL) 48 m_bufferLen = 0; 49 50 return m_buffer; 51 } ptr()52 void *ptr() { return m_buffer; } len()53 size_t len() { return m_bufferLen; } 54 private: 55 unsigned char *m_buffer; 56 size_t m_bufferLen; 57 }; 58 59 #endif 60