/* * Copyright (C) 2011 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 _FIXED_BUFFER_H #define _FIXED_BUFFER_H class FixedBuffer { public: FixedBuffer(size_t initialSize = 0) { m_buffer = NULL; m_bufferLen = initialSize; alloc(m_bufferLen); } ~FixedBuffer() { delete [] m_buffer; m_bufferLen = 0; } void * alloc(size_t size) { if (m_bufferLen >= size) return (void *)(m_buffer); if (m_buffer != NULL) delete[] m_buffer; m_bufferLen = size; m_buffer = new unsigned char[m_bufferLen]; if (m_buffer == NULL) m_bufferLen = 0; return m_buffer; } void *ptr() { return m_buffer; } size_t len() { return m_bufferLen; } private: unsigned char *m_buffer; size_t m_bufferLen; }; #endif