+++ /dev/null
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * 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.
- */
-
-
-#include <sys/types.h>
-#include <ctype.h>
-#include <vis.h>
-
-/*
- * 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
- */
-int
-unvis(cp, c, astate, flag)
- char *cp;
- int c, *astate, flag;
-{
-
- 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 = 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);
- }
-}
-
-/*
- * strunvis - decode src into dst
- *
- * Number of chars decoded into dst is returned, -1 on error.
- * Dst is null terminated.
- */
-
-int
-strunvis(dst, src)
- register char *dst;
- register const char *src;
-{
- register char c;
- char *start = dst;
- int state = 0;
-
- while (c = *src++) {
- 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);
-}
projects / apple / libc.git / blobdiff