mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
/*-
|
|
* Copyright (c) 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#ifndef lint
|
|
static const char sccsid[] = "@(#)foldit.c 8.1 (Berkeley) 6/6/93";
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "extern.h"
|
|
|
|
int
|
|
foldit(chunk, col, max)
|
|
char *chunk;
|
|
int col, max;
|
|
{
|
|
char *cp;
|
|
|
|
/*
|
|
* Keep track of column position. Insert hidden newline
|
|
* if this chunk puts us over the limit.
|
|
*/
|
|
again:
|
|
cp = chunk;
|
|
while (*cp) {
|
|
switch(*cp) {
|
|
case '\n':
|
|
case '\r':
|
|
col = 0;
|
|
break;
|
|
case '\t':
|
|
col = (col + 8) &~ 07;
|
|
break;
|
|
case '\b':
|
|
col = col ? col - 1 : 0;
|
|
break;
|
|
default:
|
|
col++;
|
|
}
|
|
if (col > (max - 2)) {
|
|
printf("\\\n");
|
|
col = 0;
|
|
goto again;
|
|
}
|
|
cp++;
|
|
}
|
|
return (col);
|
|
}
|