i_decoder.hpp

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/* SPDX-License-Identifier: MPL-2.0 */
 
#ifndef __ZMQ_I_DECODER_HPP_INCLUDED__
#define __ZMQ_I_DECODER_HPP_INCLUDED__
 
#include "macros.hpp"
#include "stdint.hpp"
 
namespace zmq
{
class msg_t;
 
//  Interface to be implemented by message decoder.
 
class i_decoder
{
  public:
    virtual ~i_decoder () ZMQ_DEFAULT;
 
    virtual void get_buffer (unsigned char **data_, size_t *size_) = 0;
 
    virtual void resize_buffer (size_t) = 0;
    //  Decodes data pointed to by data_.
    //  When a message is decoded, 1 is returned.
    //  When the decoder needs more data, 0 is returned.
    //  On error, -1 is returned and errno is set accordingly.
    virtual int
    decode (const unsigned char *data_, size_t size_, size_t &processed_) = 0;
 
    virtual msg_t *msg () = 0;
};
}
 
#endif