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 #include "ReadBuffer.h" 17 #include <string.h> 18 #include <assert.h> 19 20 ReadBuffer::ReadBuffer(SocketStream *stream, size_t bufsize) 21 { 22 m_size = bufsize; 23 m_stream = stream; 24 m_buf = new unsigned char[m_size]; 25 m_validData = 0; 26 m_readPtr = m_buf; 27 } 28 29 ReadBuffer::~ReadBuffer() 30 { 31 delete m_buf; 32 } 33 34 int ReadBuffer::getData() 35 { 36 if (m_validData > 0) { 37 memcpy(m_buf, m_readPtr, m_validData); 38 } 39 m_readPtr = m_buf; 40 // get fresh data into the buffer; 41 int stat = m_stream->recv(m_buf + m_validData, m_size - m_validData); 42 if (stat > 0) { 43 m_validData += (size_t) stat; 44 } 45 return stat; 46 } 47 48 void ReadBuffer::consume(size_t amount) 49 { 50 assert(amount <= m_validData); 51 m_validData -= amount; 52 m_readPtr += amount; 53 } 54
