outputstream.h

来自「一个语言识别引擎」· C头文件 代码 · 共 58 行

// -*- mode:C++; tab-width:4; c-basic-offset:4; indent-tabs-mode:nil -*-

/*
 * Copyright (C) 2006 Paul Fitzpatrick
 * CopyPolicy: Released under the terms of the GNU GPL v2.0.
 *
 */

#ifndef _YARP2_OUTPUTSTREAM_
#define _YARP2_OUTPUTSTREAM_

#include <yarp/Bytes.h>
#include <yarp/String.h>

namespace yarp {
    class OutputStream;
}

/**
 * Simple specification of the minimum functions needed from output streams.
 * The streams could be TCP, UDP, MCAST, ...
 */
class yarp::OutputStream {
public:

    virtual ~OutputStream() { }

    // These should be called at the beginning and end of logical packets.
    // Streams are encouraged to handle errors and atomicity at the level of 
    // logical packets
    //virtual void beginPacket() {}
    //virtual void endPacket() {}

    virtual void write(char ch) { // throws
        write(Bytes(&ch,1));
    }

    virtual void write(const Bytes& b, int offset, int len) { // throws
        write(Bytes(b.get()+offset,len));
    }

    virtual void write(const Bytes& b) = 0;

    virtual void close() = 0;

    virtual void flush() {
    }

    virtual void writeLine(const String& data) {
        Bytes b((char*)(data.c_str()),data.length());
        write(b);
        write('\n');
    }

};

#endif