mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-12-22 01:50:16 +00:00
140 lines
3.8 KiB
C
140 lines
3.8 KiB
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 1.6 2000/11/21 00:47:28 millert Exp $";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include "includes.h"
|
|
|
|
#ifndef HAVE_VIS
|
|
|
|
#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
|
|
#define isvisible(c) (((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')))
|
|
|
|
/*
|
|
* vis - visually encode characters
|
|
*/
|
|
char *vis(char *dst, int c, int flag, int nextc)
|
|
{
|
|
if (isvisible(c)) {
|
|
*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 */
|