Replace our implementation of the vis(3) and unvis(3) APIs with

NetBSD's.  This output size limited versions of vis and unvis functions
as well as a set of vis variants that allow arbitrary characters to be
specified for encoding.

Finally, MIME Quoted-Printable encoding as described in RFC 2045 is
supported.

1 files changed, 0 insertions, 293 deletions

diff --git a/lib/libc/gen/unvis.c b/lib/libc/gen/unvis.c
deleted file mode 100644
index 9069e55..0000000
--- a/lib/libc/gen/unvis.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/*-
- * 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.
- * 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 sccsid[] = "@(#)unvis.c	8.1 (Berkeley) 6/4/93";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#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	S_HEX2		7	/* hex digit 2 */
-
-#define	S_HTTP		0x080	/* %HEXHEX escape */
-
-#define	isoctal(c)	(((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
-#define	ishex(c)	((((u_char)(c)) >= '0' && ((u_char)(c)) <= '9') || (((u_char)(c)) >= 'a' && ((u_char)(c)) <= 'f'))
-
-/*
- * unvis - decode characters previously encoded by vis
- */
-int
-unvis(char *cp, int c, int *astate, int 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 & ~S_HTTP) {
-
-	case S_GROUND:
-		*cp = 0;
-		if (c == '\\') {
-			*astate = S_START;
-			return (0);
-		}
-		if (flag & VIS_HTTPSTYLE && c == '%') {
-			*astate = S_START | S_HTTP;
-			return (0);
-		}
-		*cp = c;
-		return (UNVIS_VALID);
-
-	case S_START:
-		if (*astate & S_HTTP) {
-		    if (ishex(tolower(c))) {
-			*cp = isdigit(c) ? (c - '0') : (tolower(c) - 'a');
-			*astate = S_HEX2;
-			return (0);
-		    }
-		}
-		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);
-
-	case S_HEX2:	/* second mandatory hex digit */
-		if (ishex(tolower(c))) {
-			*cp = (isdigit(c) ? (*cp << 4) + (c - '0') : (*cp << 4) + (tolower(c) - 'a' + 10));
-		}
-		*astate = S_GROUND;
-		return (UNVIS_VALID);
-
-	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(char *dst, const char *src)
-{
-	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);
-}
-
-int
-strunvisx(char *dst, const char *src, int flag)
-{
-	char c;
-	char *start = dst;
-	int state = 0;
-    
-	while ( (c = *src++) ) {
-	again:
-		switch (unvis(dst, c, &state, flag)) {
-		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);
-}