[openssh.git] / openbsd-compat / vis.c

/*-
 * 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 defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: vis.c,v 1.5 2000/07/19 15:25:13 deraadt Exp $";
#endif /* LIBC_SCCS and not lint */

#ifndef HAVE_VIS

#include "includes.h"

#define	isoctal(c)	(((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')

/*
 * vis - visually encode characters
 */
char *vis(char *dst, int c, int flag, int nextc)
{
	if (((u_int)c <= UCHAR_MAX && isascii((u_char)c) &&
	    isgraph((u_char)c)) ||
	   ((flag & VIS_SP) == 0 && c == ' ') ||
	   ((flag & VIS_TAB) == 0 && c == '\t') ||
	   ((flag & VIS_NL) == 0 && c == '\n') ||
	   ((flag & VIS_SAFE) && (c == '\b' || c == '\007' || c == '\r'))) {
		*dst++ = c;
		if (c == '\\' && (flag & VIS_NOSLASH) == 0)
			*dst++ = '\\';
		*dst = '\0';
		return (dst);
	}

	if (flag & VIS_CSTYLE) {
		switch(c) {
		case '\n':
			*dst++ = '\\';
			*dst++ = 'n';
			goto done;
		case '\r':
			*dst++ = '\\';
			*dst++ = 'r';
			goto done;
		case '\b':
			*dst++ = '\\';
			*dst++ = 'b';
			goto done;
#ifdef __STDC__
		case '\a':
#else
		case '\007':
#endif
			*dst++ = '\\';
			*dst++ = 'a';
			goto done;
		case '\v':
			*dst++ = '\\';
			*dst++ = 'v';
			goto done;
		case '\t':
			*dst++ = '\\';
			*dst++ = 't';
			goto done;
		case '\f':
			*dst++ = '\\';
			*dst++ = 'f';
			goto done;
		case ' ':
			*dst++ = '\\';
			*dst++ = 's';
			goto done;
		case '\0':
			*dst++ = '\\';
			*dst++ = '0';
			if (isoctal(nextc)) {
				*dst++ = '0';
				*dst++ = '0';
			}
			goto done;
		}
	}
	if (((c & 0177) == ' ') || (flag & VIS_OCTAL)) {	
		*dst++ = '\\';
		*dst++ = ((u_char)c >> 6 & 07) + '0';
		*dst++ = ((u_char)c >> 3 & 07) + '0';
		*dst++ = ((u_char)c & 07) + '0';
		goto done;
	}
	if ((flag & VIS_NOSLASH) == 0)
		*dst++ = '\\';
	if (c & 0200) {
		c &= 0177;
		*dst++ = 'M';
	}
	if (iscntrl(c)) {
		*dst++ = '^';
		if (c == 0177)
			*dst++ = '?';
		else
			*dst++ = c + '@';
	} else {
		*dst++ = '-';
		*dst++ = c;
	}
done:
	*dst = '\0';
	return (dst);
}
#endif /* HAVE_VIS */
Commit	Line	Data
94ec8c6b	1	/*-
	2	* Copyright (c) 1989, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#if defined(LIBC_SCCS) && !defined(lint)
	35	static char rcsid[] = "$OpenBSD: vis.c,v 1.5 2000/07/19 15:25:13 deraadt Exp $";
	36	#endif /* LIBC_SCCS and not lint */
	37
	38	#ifndef HAVE_VIS
	39
	40	#include "includes.h"
	41
	42	#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
	43
	44	/*
	45	* vis - visually encode characters
	46	*/
	47	char vis(char dst, int c, int flag, int nextc)
	48	{
	49	if (((u_int)c <= UCHAR_MAX && isascii((u_char)c) &&
	50	isgraph((u_char)c)) \|\|
	51	((flag & VIS_SP) == 0 && c == ' ') \|\|
	52	((flag & VIS_TAB) == 0 && c == '\t') \|\|
	53	((flag & VIS_NL) == 0 && c == '\n') \|\|
	54	((flag & VIS_SAFE) && (c == '\b' \|\| c == '\007' \|\| c == '\r'))) {
	55	*dst++ = c;
	56	if (c == '\\' && (flag & VIS_NOSLASH) == 0)
	57	*dst++ = '\\';
	58	*dst = '\0';
	59	return (dst);
	60	}
	61
	62	if (flag & VIS_CSTYLE) {
	63	switch(c) {
	64	case '\n':
65	*dst++ = '\\';
66	*dst++ = 'n';
67	goto done;
68	case '\r':
69	*dst++ = '\\';
70	*dst++ = 'r';
71	goto done;
72	case '\b':
73	*dst++ = '\\';
74	*dst++ = 'b';
75	goto done;
76	#ifdef __STDC__
77	case '\a':
78	#else
79	case '\007':
80	#endif
81	*dst++ = '\\';
82	*dst++ = 'a';
83	goto done;
84	case '\v':
85	*dst++ = '\\';
86	*dst++ = 'v';
87	goto done;
88	case '\t':
89	*dst++ = '\\';
90	*dst++ = 't';
91	goto done;
92	case '\f':
93	*dst++ = '\\';
94	*dst++ = 'f';
95	goto done;
96	case ' ':
97	*dst++ = '\\';
98	*dst++ = 's';
99	goto done;
100	case '\0':
101	*dst++ = '\\';
102	*dst++ = '0';
103	if (isoctal(nextc)) {
104	*dst++ = '0';
105	*dst++ = '0';
106	}
107	goto done;
108	}
109	}
110	if (((c & 0177) == ' ') \|\| (flag & VIS_OCTAL)) {
111	*dst++ = '\\';
112	*dst++ = ((u_char)c >> 6 & 07) + '0';
113	*dst++ = ((u_char)c >> 3 & 07) + '0';
114	*dst++ = ((u_char)c & 07) + '0';
115	goto done;
116	}
117	if ((flag & VIS_NOSLASH) == 0)
118	*dst++ = '\\';
119	if (c & 0200) {
120	c &= 0177;
121	*dst++ = 'M';
122	}
123	if (iscntrl(c)) {
124	*dst++ = '^';
125	if (c == 0177)
126	*dst++ = '?';
127	else
128	*dst++ = c + '@';
129	} else {
130	*dst++ = '-';
131	*dst++ = c;
132	}
133	done:
134	*dst = '\0';
135	return (dst);
136	}
137	#endif /* HAVE_VIS */