289 lines
6.5 KiB
C
289 lines
6.5 KiB
C
/* $NetBSD: unvis.c,v 1.19 2000/01/22 22:19:13 mycroft Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1989, 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.
|
|
*/
|
|
|
|
#if 1
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
RCSID("$Id: unvis.c,v 1.2 2000/12/06 21:41:46 joda Exp $");
|
|
#endif
|
|
#include <roken.h>
|
|
#ifndef _DIAGASSERT
|
|
#define _DIAGASSERT(X)
|
|
#endif
|
|
#else
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/4/93";
|
|
#else
|
|
__RCSID("$NetBSD: unvis.c,v 1.19 2000/01/22 22:19:13 mycroft Exp $");
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#define __LIBC12_SOURCE__
|
|
|
|
#include "namespace.h"
|
|
#endif
|
|
#include <sys/types.h>
|
|
|
|
#include <assert.h>
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <vis.h>
|
|
|
|
#if 0
|
|
#ifdef __weak_alias
|
|
__weak_alias(strunvis,_strunvis)
|
|
__weak_alias(unvis,_unvis)
|
|
#endif
|
|
|
|
__warn_references(unvis,
|
|
"warning: reference to compatibility unvis(); include <vis.h> for correct reference")
|
|
#endif
|
|
|
|
/*
|
|
* decode driven by state machine
|
|
*/
|
|
#define S_GROUND 0 /* haven't seen escape char */
|
|
#define S_START 1 /* start decoding special sequence */
|
|
#define S_META 2 /* metachar started (M) */
|
|
#define S_META1 3 /* metachar more, regular char (-) */
|
|
#define S_CTRL 4 /* control char started (^) */
|
|
#define S_OCTAL2 5 /* octal digit 2 */
|
|
#define S_OCTAL3 6 /* octal digit 3 */
|
|
|
|
#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
|
|
|
|
/*
|
|
* unvis - decode characters previously encoded by vis
|
|
*/
|
|
#ifndef HAVE_UNVIS
|
|
int
|
|
unvis(char *cp, int c, int *astate, int flag)
|
|
{
|
|
|
|
_DIAGASSERT(cp != NULL);
|
|
_DIAGASSERT(astate != NULL);
|
|
|
|
if (flag & UNVIS_END) {
|
|
if (*astate == S_OCTAL2 || *astate == S_OCTAL3) {
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
}
|
|
return (*astate == S_GROUND ? UNVIS_NOCHAR : UNVIS_SYNBAD);
|
|
}
|
|
|
|
switch (*astate) {
|
|
|
|
case S_GROUND:
|
|
*cp = 0;
|
|
if (c == '\\') {
|
|
*astate = S_START;
|
|
return (0);
|
|
}
|
|
*cp = c;
|
|
return (UNVIS_VALID);
|
|
|
|
case S_START:
|
|
switch(c) {
|
|
case '\\':
|
|
*cp = c;
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case '0': case '1': case '2': case '3':
|
|
case '4': case '5': case '6': case '7':
|
|
*cp = (c - '0');
|
|
*astate = S_OCTAL2;
|
|
return (0);
|
|
case 'M':
|
|
*cp = (char)0200;
|
|
*astate = S_META;
|
|
return (0);
|
|
case '^':
|
|
*astate = S_CTRL;
|
|
return (0);
|
|
case 'n':
|
|
*cp = '\n';
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case 'r':
|
|
*cp = '\r';
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case 'b':
|
|
*cp = '\b';
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case 'a':
|
|
*cp = '\007';
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case 'v':
|
|
*cp = '\v';
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case 't':
|
|
*cp = '\t';
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case 'f':
|
|
*cp = '\f';
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case 's':
|
|
*cp = ' ';
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case 'E':
|
|
*cp = '\033';
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
case '\n':
|
|
/*
|
|
* hidden newline
|
|
*/
|
|
*astate = S_GROUND;
|
|
return (UNVIS_NOCHAR);
|
|
case '$':
|
|
/*
|
|
* hidden marker
|
|
*/
|
|
*astate = S_GROUND;
|
|
return (UNVIS_NOCHAR);
|
|
}
|
|
*astate = S_GROUND;
|
|
return (UNVIS_SYNBAD);
|
|
|
|
case S_META:
|
|
if (c == '-')
|
|
*astate = S_META1;
|
|
else if (c == '^')
|
|
*astate = S_CTRL;
|
|
else {
|
|
*astate = S_GROUND;
|
|
return (UNVIS_SYNBAD);
|
|
}
|
|
return (0);
|
|
|
|
case S_META1:
|
|
*astate = S_GROUND;
|
|
*cp |= c;
|
|
return (UNVIS_VALID);
|
|
|
|
case S_CTRL:
|
|
if (c == '?')
|
|
*cp |= 0177;
|
|
else
|
|
*cp |= c & 037;
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALID);
|
|
|
|
case S_OCTAL2: /* second possible octal digit */
|
|
if (isoctal(c)) {
|
|
/*
|
|
* yes - and maybe a third
|
|
*/
|
|
*cp = (*cp << 3) + (c - '0');
|
|
*astate = S_OCTAL3;
|
|
return (0);
|
|
}
|
|
/*
|
|
* no - done with current sequence, push back passed char
|
|
*/
|
|
*astate = S_GROUND;
|
|
return (UNVIS_VALIDPUSH);
|
|
|
|
case S_OCTAL3: /* third possible octal digit */
|
|
*astate = S_GROUND;
|
|
if (isoctal(c)) {
|
|
*cp = (*cp << 3) + (c - '0');
|
|
return (UNVIS_VALID);
|
|
}
|
|
/*
|
|
* we were done, push back passed char
|
|
*/
|
|
return (UNVIS_VALIDPUSH);
|
|
|
|
default:
|
|
/*
|
|
* decoder in unknown state - (probably uninitialized)
|
|
*/
|
|
*astate = S_GROUND;
|
|
return (UNVIS_SYNBAD);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* strunvis - decode src into dst
|
|
*
|
|
* Number of chars decoded into dst is returned, -1 on error.
|
|
* Dst is null terminated.
|
|
*/
|
|
|
|
#ifndef HAVE_STRUNVIS
|
|
int
|
|
strunvis(char *dst, const char *src)
|
|
{
|
|
char c;
|
|
char *start = dst;
|
|
int state = 0;
|
|
|
|
_DIAGASSERT(src != NULL);
|
|
_DIAGASSERT(dst != NULL);
|
|
|
|
while ((c = *src++) != '\0') {
|
|
again:
|
|
switch (unvis(dst, c, &state, 0)) {
|
|
case UNVIS_VALID:
|
|
dst++;
|
|
break;
|
|
case UNVIS_VALIDPUSH:
|
|
dst++;
|
|
goto again;
|
|
case 0:
|
|
case UNVIS_NOCHAR:
|
|
break;
|
|
default:
|
|
return (-1);
|
|
}
|
|
}
|
|
if (unvis(dst, c, &state, UNVIS_END) == UNVIS_VALID)
|
|
dst++;
|
|
*dst = '\0';
|
|
return (dst - start);
|
|
}
|
|
#endif
|