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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gen/unvis.c	Lines:	0	126	0.0 %
Date:	2017-11-13	Branches:	0	85	0.0 %


/*	$OpenBSD: unvis.c,v 1.17 2015/09/13 11:32:51 guenther 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. 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(char *cp, char 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) {

	case S_GROUND:
		*cp = 0;
		if (c == '\\') {
			*astate = S_START;
			return (0);
		}
		*cp = c;
		return (UNVIS_VALID);

	case S_START:
		switch(c) {
		case '-':
			*cp = 0;
			*astate = S_GROUND;
			return (0);
		case '\\':
		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);
	}
}
DEF_WEAK(unvis);

/*
 * 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:
			*dst = '\0';
			return (-1);
		}
	}
	if (unvis(dst, c, &state, UNVIS_END) == UNVIS_VALID)
		dst++;
	*dst = '\0';
	return (dst - start);
}

ssize_t
strnunvis(char *dst, const char *src, size_t sz)
{
	char c, p;
	char *start = dst, *end = dst + sz - 1;
	int state = 0;

	if (sz > 0)
		*end = '\0';
	while ((c = *src++)) {
	again:
		switch (unvis(&p, c, &state, 0)) {
		case UNVIS_VALID:
			if (dst < end)
				*dst = p;
			dst++;
			break;
		case UNVIS_VALIDPUSH:
			if (dst < end)
				*dst = p;
			dst++;
			goto again;
		case 0:
		case UNVIS_NOCHAR:
			break;
		default:
			if (dst <= end)
				*dst = '\0';
			return (-1);
		}
	}
	if (unvis(&p, c, &state, UNVIS_END) == UNVIS_VALID) {
		if (dst < end)
			*dst = p;
		dst++;
	}
	if (dst <= end)
		*dst = '\0';
	return (dst - start);
}



Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: unvis.c,v 1.17 2015/09/13 11:32:51 guenther Exp $ */
2			/*-
3			* Copyright (c) 1989, 1993
4			* The Regents of the University of California. All rights reserved.
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			* 2. Redistributions in binary form must reproduce the above copyright
12			* notice, this list of conditions and the following disclaimer in the
13			* documentation and/or other materials provided with the distribution.
14			* 3. Neither the name of the University nor the names of its contributors
15			* may be used to endorse or promote products derived from this software
16			* without specific prior written permission.
17			*
18			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28			* SUCH DAMAGE.
29			*/
30
31			#include <sys/types.h>
32			#include <ctype.h>
33			#include <vis.h>
34
35			/*
36			* decode driven by state machine
37			*/
38			#define S_GROUND 0 /* haven't seen escape char */
39			#define S_START 1 /* start decoding special sequence */
40			#define S_META 2 /* metachar started (M) */
41			#define S_META1 3 /* metachar more, regular char (-) */
42			#define S_CTRL 4 /* control char started (^) */
43			#define S_OCTAL2 5 /* octal digit 2 */
44			#define S_OCTAL3 6 /* octal digit 3 */
45
46			#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
47
48			/*
49			* unvis - decode characters previously encoded by vis
50			*/
51			int
52			unvis(char cp, char c, int astate, int flag)
53			{
54
55			if (flag & UNVIS_END) {
56			if (astate == S_OCTAL2 \|\| astate == S_OCTAL3) {
57			*astate = S_GROUND;
58			return (UNVIS_VALID);
59			}
60			return (*astate == S_GROUND ? UNVIS_NOCHAR : UNVIS_SYNBAD);
61			}
62
63			switch (*astate) {
64
65			case S_GROUND:
66			*cp = 0;
67			if (c == '\\') {
68			*astate = S_START;
69			return (0);
70			}
71			*cp = c;
72			return (UNVIS_VALID);
73
74			case S_START:
75			switch(c) {
76			case '-':
77			*cp = 0;
78			*astate = S_GROUND;
79			return (0);
80			case '\\':
81			case '"':
82			*cp = c;
83			*astate = S_GROUND;
84			return (UNVIS_VALID);
85			case '0': case '1': case '2': case '3':
86			case '4': case '5': case '6': case '7':
87			*cp = (c - '0');
88			*astate = S_OCTAL2;
89			return (0);
90			case 'M':
91			*cp = (char) 0200;
92			*astate = S_META;
93			return (0);
94			case '^':
95			*astate = S_CTRL;
96			return (0);
97			case 'n':
98			*cp = '\n';
99			*astate = S_GROUND;
100			return (UNVIS_VALID);
101			case 'r':
102			*cp = '\r';
103			*astate = S_GROUND;
104			return (UNVIS_VALID);
105			case 'b':
106			*cp = '\b';
107			*astate = S_GROUND;
108			return (UNVIS_VALID);
109			case 'a':
110			*cp = '\007';
111			*astate = S_GROUND;
112			return (UNVIS_VALID);
113			case 'v':
114			*cp = '\v';
115			*astate = S_GROUND;
116			return (UNVIS_VALID);
117			case 't':
118			*cp = '\t';
119			*astate = S_GROUND;
120			return (UNVIS_VALID);
121			case 'f':
122			*cp = '\f';
123			*astate = S_GROUND;
124			return (UNVIS_VALID);
125			case 's':
126			*cp = ' ';
127			*astate = S_GROUND;
128			return (UNVIS_VALID);
129			case 'E':
130			*cp = '\033';
131			*astate = S_GROUND;
132			return (UNVIS_VALID);
133			case '\n':
134			/*
135			* hidden newline
136			*/
137			*astate = S_GROUND;
138			return (UNVIS_NOCHAR);
139			case '$':
140			/*
141			* hidden marker
142			*/
143			*astate = S_GROUND;
144			return (UNVIS_NOCHAR);
145			}
146			*astate = S_GROUND;
147			return (UNVIS_SYNBAD);
148
149			case S_META:
150			if (c == '-')
151			*astate = S_META1;
152			else if (c == '^')
153			*astate = S_CTRL;
154			else {
155			*astate = S_GROUND;
156			return (UNVIS_SYNBAD);
157			}
158			return (0);
159
160			case S_META1:
161			*astate = S_GROUND;
162			*cp \|= c;
163			return (UNVIS_VALID);
164
165			case S_CTRL:
166			if (c == '?')
167			*cp \|= 0177;
168			else
169			*cp \|= c & 037;
170			*astate = S_GROUND;
171			return (UNVIS_VALID);
172
173			case S_OCTAL2: /* second possible octal digit */
174			if (isoctal(c)) {
175			/*
176			* yes - and maybe a third
177			*/
178			cp = (cp << 3) + (c - '0');
179			*astate = S_OCTAL3;
180			return (0);
181			}
182			/*
183			* no - done with current sequence, push back passed char
184			*/
185			*astate = S_GROUND;
186			return (UNVIS_VALIDPUSH);
187
188			case S_OCTAL3: /* third possible octal digit */
189			*astate = S_GROUND;
190			if (isoctal(c)) {
191			cp = (cp << 3) + (c - '0');
192			return (UNVIS_VALID);
193			}
194			/*
195			* we were done, push back passed char
196			*/
197			return (UNVIS_VALIDPUSH);
198
199			default:
200			/*
201			* decoder in unknown state - (probably uninitialized)
202			*/
203			*astate = S_GROUND;
204			return (UNVIS_SYNBAD);
205			}
206			}
207			DEF_WEAK(unvis);
208
209			/*
210			* strunvis - decode src into dst
211			*
212			* Number of chars decoded into dst is returned, -1 on error.
213			* Dst is null terminated.
214			*/
215
216			int
217			strunvis(char dst, const char src)
218			{
219			char c;
220			char *start = dst;
221			int state = 0;
222
223			while ((c = *src++)) {
224			again:
225			switch (unvis(dst, c, &state, 0)) {
226			case UNVIS_VALID:
227			dst++;
228			break;
229			case UNVIS_VALIDPUSH:
230			dst++;
231			goto again;
232			case 0:
233			case UNVIS_NOCHAR:
234			break;
235			default:
236			*dst = '\0';
237			return (-1);
238			}
239			}
240			if (unvis(dst, c, &state, UNVIS_END) == UNVIS_VALID)
241			dst++;
242			*dst = '\0';
243			return (dst - start);
244			}
245
246			ssize_t
247			strnunvis(char dst, const char src, size_t sz)
248			{
249			char c, p;
250			char start = dst, end = dst + sz - 1;
251			int state = 0;
252
253			if (sz > 0)
254			*end = '\0';
255			while ((c = *src++)) {
256			again:
257			switch (unvis(&p, c, &state, 0)) {
258			case UNVIS_VALID:
259			if (dst < end)
260			*dst = p;
261			dst++;
262			break;
263			case UNVIS_VALIDPUSH:
264			if (dst < end)
265			*dst = p;
266			dst++;
267			goto again;
268			case 0:
269			case UNVIS_NOCHAR:
270			break;
271			default:
272			if (dst <= end)
273			*dst = '\0';
274			return (-1);
275			}
276			}
277			if (unvis(&p, c, &state, UNVIS_END) == UNVIS_VALID) {
278			if (dst < end)
279			*dst = p;
280			dst++;
281			}
282			if (dst <= end)
283			*dst = '\0';
284			return (dst - start);
285			}
286