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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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find_column.c
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C/C++ Source or Header
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1994-02-08
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2KB
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/*
* Copyright (C) 1992 by Rush Record
* Copyright (C) 1993 by Charles Sandmann (sandmann@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: find_column
|Callby: down_arrow up_arrow
|Purpose: Returns the column number of the end of a record, and the length of
| the data that fit on the screen.
|Arguments:
| r is the record.
| col is the column limit for the analysis of the record.
| byte is the returned length of the data that fits on the screen.
\******************************************************************************/
Int find_column(r,col,byte)
register rec_ptr r;
register Int col,*byte;
{
register Int i,c,last,ch;
if(HEXMODE)
{
for(last = c = i = 0;i < r->length;i++)
{
last = c;
c += 4;
if(c >= col)
break;
}
}
else
{
for(last = c = i = 0;i < r->length;i++)
{
last = c;
if((ch = r->data[i]) == '\t')
c = tabstop(c);
else if(NONPRINTNCS(ch))
c += 4;
else
c++;
if(c >= col)
break;
}
}
*byte = i;
return(last + 1);
}