/****************************************************************/
/* */
/* chario.c */
/* DOS-C */
/* */
/* Character device functions and device driver interface */
/* */
/* Copyright (c) 1994 */
/* Pasquale J. Villani */
/* All Rights Reserved */
/* */
/* This file is part of DOS-C. */
/* */
/* DOS-C 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 */
/* 2, or (at your option) any later version. */
/* */
/* DOS-C 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 DOS-C; see the file COPYING. If not, */
/* write to the Free Software Foundation, 675 Mass Ave, */
/* Cambridge, MA 02139, USA. */
/* */
/****************************************************************/
#include "../../hdr/portab.h"
/* $Logfile: D:/dos-c/src/fs/chario.c_v $ */
#ifndef IPL
static BYTE *charioRcsId = "$Header: D:/dos-c/src/fs/chario.c_v 1.3 29 May 1996 21:15:12 patv $";
#endif
/*
* $Log: D:/dos-c/src/fs/chario.c_v $
*
* Rev 1.3 29 May 1996 21:15:12 patv
* bug fixes for v0.91a
*
* Rev 1.2 01 Sep 1995 17:48:42 patv
* First GPL release.
*
* Rev 1.1 30 Jul 1995 20:50:26 patv
* Eliminated version strings in ipl
*
* Rev 1.0 02 Jul 1995 8:05:44 patv
* Initial revision.
*
*/
#include "globals.h"
static BYTE *con_name = "CON";
#if !defined(KERNEL) && !defined(IPL)
VOID INRPT FAR
handle_break (void)
{
}
#endif
#ifdef PROTO
BOOL _sto(COUNT);
VOID kbfill(keyboard FAR *, UCOUNT, BOOL);
#else
BOOL _sto();
VOID kbfill();
#endif
static BOOL
_sto (COUNT c)
{
request rq;
BYTE buf = c;
if(con_break())
{
handle_break();
return FALSE;
}
rq.r_length = sizeof(request);
rq.r_command = C_OUTPUT;
rq.r_count = 1;
rq.r_trans = (BYTE FAR *)(&buf);
rq.r_status = 0;
execrh((request FAR *)&rq, (struct dhdr FAR *)&con_dev);
if(rq.r_status & S_ERROR)
return char_error(&rq, con_name);
return TRUE;
}
VOID
sto (COUNT c)
{
/* Test for hold char */
con_hold();
/* Display a printable character */
if(c != HT)
_sto(c);
if(c == CR)
scr_pos = 0;
else if(c == BS)
{
if(scr_pos > 0)
--scr_pos;
}
else if(c == HT)
{
do
_sto(' ');
while(++scr_pos & 7);
}
else if(c != LF && c != BS)
++scr_pos;
}
VOID
mod_sto (REG UCOUNT c)
{
if(c < ' ' && c != HT)
{
sto('^');
sto(c + '@');
}
else
sto(c);
}
VOID
destr_bs (void)
{
sto(BS);
sto(' ');
sto(BS);
}
UCOUNT
_sti (void)
{
UBYTE cb;
request rq;
rq.r_length = sizeof(request);
rq.r_command = C_INPUT;
rq.r_count = 1;
rq.r_trans = (BYTE FAR *)&cb;
rq.r_status = 0;
execrh((request FAR *)&rq, (struct dhdr FAR *)&con_dev);
if(rq.r_status & S_ERROR)
return char_error(&rq, con_name);
if(cb == CTL_C)
{
handle_break();
return CTL_C;
}
else
return cb;
}
VOID
con_hold (void)
{
request rq;
rq.r_unit = 0;
rq.r_status = 0;
rq.r_command = C_NDREAD;
rq.r_length = sizeof(request);
execrh((request FAR *)&rq, (struct dhdr FAR *)&con_dev);
if(rq.r_status & S_BUSY)
return;
if(rq.r_ndbyte == CTL_S)
{
_sti();
while(_sti() != CTL_Q)
/* just wait */;
}
}
BOOL
con_break (void)
{
request rq;
rq.r_unit = 0;
rq.r_status = 0;
rq.r_command = C_NDREAD;
rq.r_length = sizeof(request);
execrh((request FAR *)&rq, (struct dhdr FAR *)&con_dev);
if(rq.r_status & S_BUSY)
return FALSE;
if(rq.r_ndbyte == CTL_C)
{
_sti();
return TRUE;
}
else
return FALSE;
}
BOOL
KbdBusy (void)
{
request rq;
rq.r_unit = 0;
rq.r_status = 0;
rq.r_command = C_ISTAT;
rq.r_length = sizeof(request);
execrh((request FAR *)&rq, (struct dhdr FAR *)&con_dev);
if(rq.r_status & S_BUSY)
return TRUE;
else
return FALSE;
}
VOID
KbdFlush (void)
{
request rq;
rq.r_unit = 0;
rq.r_status = 0;
rq.r_command = C_IFLUSH;
rq.r_length = sizeof(request);
execrh((request FAR *)&rq, (struct dhdr FAR *)&con_dev);
}
static VOID kbfill(kp, c, ctlf)
keyboard FAR *kp;
UCOUNT c;
BOOL ctlf;
{
if(kp -> kb_count > kp -> kb_size)
{
sto(BELL);
return;
}
kp -> kb_buf[kp -> kb_count++] = c;
if(!ctlf)
mod_sto(c);
else
sto(c);
}
VOID sti(kp)
keyboard FAR *kp;
{
REG UWORD c, cu_pos = scr_pos;
WORD init_count = kp -> kb_count;
#ifndef NOSPCL
static BYTE local_buffer[LINESIZE];
#endif
if(kp -> kb_size == 0)
return;
if(kp -> kb_size <= kp -> kb_count || kp -> kb_buf[kp -> kb_count] != CR)
kp -> kb_count = 0;
FOREVER
{
switch(c = _sti())
{
case CTL_F:
continue;
#ifndef NOSPCL
case SPCL:
switch(c = _sti())
{
case LEFT:
goto backspace;
case F3:
{
REG COUNT i;
for(i = kp -> kb_count; local_buffer[i] != '\0'; i++)
{
c = local_buffer[kp -> kb_count];
if(c == '\r' || c == '\n')
break;
kbfill(kp, c, FALSE);
}
break;
}
case RIGHT:
c = local_buffer[kp -> kb_count];
if(c == '\r' || c == '\n')
break;
kbfill(kp, c, FALSE);
break;
}
break;
#endif
case CTL_BS:
case BS:
backspace:
if(kp -> kb_count > 0)
{
if(kp -> kb_buf[kp -> kb_count - 1] >= ' ')
{
destr_bs();
}
else if((kp -> kb_buf[kp -> kb_count - 1] < ' ')
&& (kp -> kb_buf[kp -> kb_count - 1] != HT))
{
destr_bs();
destr_bs();
}
else if(kp -> kb_buf[kp -> kb_count - 1] == HT)
{
do
{
destr_bs();
}
while((scr_pos > cu_pos) && (scr_pos & 7));
}
--kp -> kb_count;
}
break;
case CR:
kbfill(kp, CR, TRUE);
kbfill(kp, LF, TRUE);
#ifndef NOSPCL
fbcopy((BYTE FAR *)kp -> kb_buf,
(BYTE FAR *)local_buffer, (COUNT)kp -> kb_count);
local_buffer[kp -> kb_count] = '\0';
#endif
return;
case LF:
sto(CR);
sto(LF);
break;
case ESC:
sto('\\');
sto(CR);
sto(LF);
for(c = 0; c < cu_pos; c++)
sto(' ');
kp -> kb_count = init_count;
break;
default:
kbfill(kp, c, FALSE);
break;
}
}
}
