activemq/openwire-cpp/src/main/cpp/ppr/io/SocketInputStream.cpp

/* 
 * Copyright 2006 The Apache Software Foundation or its licensors, as
 * applicable.
 *
 * 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.
 */
#include "ppr/io/SocketInputStream.hpp"

using namespace apache::ppr::io;

void SocketInputStream::close() throw(IOException)
{
    // no-op
}

/*
 *
 */
int SocketInputStream::read(char* buf, int index, int size) throw(IOException)
{
    char* buffer = buf + index ;
    int   length, remaining = size ;

    // Loop until requested number of bytes are read
    while( remaining > 0 )
    {
        // Try to read remaining bytes
        length = remaining ;

        try
        {
            // Read some bytes from socket
            length = socket->receive(buffer, length) ;
        }
        catch( SocketException se )
        {
            // Exit on any error
            throw IOException("Failed to read from socket; error message = %s, at %s line %d", se.what(), __FILE__, __LINE__) ;
        }

        // Adjust buffer pointer and remaining number of bytes
        buffer    += length ;
        remaining -= length ;
	}
	return size ;
}