strmputchar.c

来自「sdcc是为51等小型嵌入式cpu设计的c语言编译器支持数种不同类型的cpu」· C语言 代码 · 共 62 行

/*-----------------------------------------------------------------
    strmputchar.c - stream putchar dispatch function

    Written for pic16 port, by Vangelis Rokas, 2005 ([e-mail])
    
    This library is free software; you can redistribute it and/or modify it
    under the terms of the GNU Library General Public License as published by the
    Free Software Foundation; either version 2, or (at your option) any
    later version.

    This library 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 Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this program; if not, write to the Free Software
    Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

    In other words, you are welcome to use, share and improve this program.
    You are forbidden to forbid anyone else to use, share and improve
    what you give them.   Help stamp out software-hoarding!
-------------------------------------------------------------------------*/

/*
** $Id: strmputchar.c 3711 2005-03-31 16:25:17Z vrokas $
*/

#include <stdio.h>

void __stream_putchar(FILE *stream, unsigned char c)
{
  unsigned char deref;

    deref = (unsigned char)(((unsigned long)stream) >> 16);

#if _DEBUG
    io_str( "__stream_putchar: " );
    io_long((unsigned long)stream);
#endif

    if(deref == 0x80) {
      /* this is a data/near memory pointer */
      *(*(char **)stream) = c;
      *(char **)stream+=1;
    } else
    if(deref & 0x20) {
      deref ^= 0x20;
      if(deref == USART_DEREF)
        __stream_usart_putchar(c);
      else
      if(deref == MSSP_DEREF)
        __stream_mssp_putchar(c);
      else
      if(deref == USER_DEREF)
        putchar(c);
      else
      if(deref == GPSIM_DEREF)			/* see stdio.h for info on this */
        __stream_gpsim_putchar(c);		/* feature */
    }
}