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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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vol_400
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424_02
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ED-157
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get_seldir.c
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C/C++ Source or Header
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1993-09-10
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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: get_seldir
|Callby: edit output_file sort_recs trim word_fill
|Purpose: Figures out in which direction the select marker lies.
|Arguments:
| none
\******************************************************************************/
Int get_seldir()
{
register rec_ptr forw,back;
if(SELREC == CURREC)
{
if(SELBYT < CURBYT)
return(-1);
else if(SELBYT > CURBYT)
return(1);
else
return(0);
}
if(SELREC == BASE)
return(1);
if(CURREC == BASE)
return(-1);
forw = back = CURREC;
while(forw != SELREC && back != SELREC)
{
if((forw = forw->next) == BASE)
return(-1);
if((back = back->prev) == BASE)
return(1);
}
if(forw == SELREC)
return(1);
else
return(-1);
}