text: /* Serial port emulation via sockets.
     Copyright (C) 1998-2017 Free Software Foundation, Inc.
  
  This file is part of the GNU simulators.
  
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #ifndef DV_SOCKSER_H
  #define DV_SOCKSER_H
  
  #include "sim-inline.h"
  
  /* bits in result of dev_sockser_status */
  #define DV_SOCKSER_INPUT_EMPTY  0x1
  #define DV_SOCKSER_OUTPUT_EMPTY 0x2
  #define DV_SOCKSER_DISCONNECTED 0x4
  
  #ifdef HAVE_DV_SOCKSER
  
  /* FIXME: later add a device ptr arg */
  extern int dv_sockser_status (SIM_DESC);
  int dv_sockser_write (SIM_DESC, unsigned char);
  int dv_sockser_write_buffer (SIM_DESC, const unsigned char *, unsigned);
  int dv_sockser_read (SIM_DESC);
  
  SIM_RC dv_sockser_install (SIM_DESC);
  
  #else
  
  /* If dv-sockser isn't available, provide stub functions.  */
  
  STATIC_INLINE int
  dv_sockser_status (SIM_DESC sd)
  {
    return (DV_SOCKSER_INPUT_EMPTY  |
  	  DV_SOCKSER_OUTPUT_EMPTY |
  	  DV_SOCKSER_DISCONNECTED);
  }
  
  STATIC_INLINE int
  dv_sockser_write (SIM_DESC sd, unsigned char c)
  {
    return -1;
  }
  
  STATIC_INLINE int
  dv_sockser_write_buffer (SIM_DESC sd, const unsigned char *buffer,
  			 unsigned nr_bytes)
  {
    return -1;
  }
  
  STATIC_INLINE int
  dv_sockser_read (SIM_DESC sd)
  {
    return -1;
  }
  
  #endif /* HAVE_DV_SOCKSER */
  
  #endif /* DV_SOCKSER_H */
  