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backspace.c
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backspace.c
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/*
* Copyright (C) 1992 by Rush Record (rhr@clio.rice.edu)
*
* This file is part of ED.
*
* ED 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.
*
* ED 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 ED
* (see the file COPYING). If not, write to the Free Software Foundation, 675
* Mass Ave, Cambridge, MA 02139, USA.
*/
#include "opsys.h"
#include "rec.h"
#include "window.h"
#include "ed_dec.h"
/******************************************************************************\
|Routine: backspace
|Callby: edit move_line
|Purpose: Implements the EDT-like behavior of the backspace key (control-H).
| If at the beginning of a line, move up, else, move to the beginning
| of the line.
|Arguments:
| repeat is the repeat count applied to the action.
\******************************************************************************/
void backspace(repeat)
register Int repeat;
{
if(CURCOL == 1)
up_arrow(repeat);
else
{
CURBYT = 0;
CURCOL = 1;
if(repeat > 1)
{
WANTCOL = 1;
up_arrow(repeat - 1);
}
}
WANTCOL = CURCOL;
}