Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/tr/str.c	Lines:	25	126	19.8 %
Date:	2016-12-06	Branches:	14	88	15.9 %


/*	$OpenBSD: str.c,v 1.12 2012/12/05 23:20:26 deraadt Exp $	*/
/*	$NetBSD: str.c,v 1.7 1995/08/31 22:13:47 jtc Exp $	*/

/*-
 * Copyright (c) 1991, 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 <errno.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <err.h>

#include "extern.h"

static int	backslash(STR *);
static int	bracket(STR *);
static int	c_class(const void *, const void *);
static void	genclass(STR *);
static void	genequiv(STR *);
static int	genrange(STR *);
static void	genseq(STR *);

int
next(s)
	STR *s;
{
	int ch;

	switch (s->state) {
	case EOS:
		return (0);
	case INFINITE:
		return (1);
	case NORMAL:
		switch (ch = *s->str) {
		case '\0':
			s->state = EOS;
			return (0);
		case '\\':
			s->lastch = backslash(s);
			break;
		case '[':
			if (bracket(s))
				return (next(s));
			/* FALLTHROUGH */
		default:
			++s->str;
			s->lastch = ch;
			break;
		}

		/* We can start a range at any time. */
		if (s->str[0] == '-' && genrange(s))
			return (next(s));
		return (1);
	case RANGE:
		if (s->cnt-- == 0) {
			s->state = NORMAL;
			return (next(s));
		}
		++s->lastch;
		return (1);
	case SEQUENCE:
		if (s->cnt-- == 0) {
			s->state = NORMAL;
			return (next(s));
		}
		return (1);
	case SET:
		if ((s->lastch = s->set[s->cnt++]) == OOBCH) {
			s->state = NORMAL;
			return (next(s));
		}
		return (1);
	default:
		return 0;
	}
	/* NOTREACHED */
}

static int
bracket(s)
	STR *s;
{
	char *p;

	switch (s->str[1]) {
	case ':':				/* "[:class:]" */
		if ((p = strstr((char *)s->str + 2, ":]")) == NULL)
			return (0);
		*p = '\0';
		s->str += 2;
		genclass(s);
		s->str = (unsigned char *)p + 2;
		return (1);
	case '=':				/* "[=equiv=]" */
		if ((p = strstr((char *)s->str + 2, "=]")) == NULL)
			return (0);
		s->str += 2;
		genequiv(s);
		return (1);
	default:				/* "[\###*n]" or "[#*n]" */
		if ((p = strpbrk((char *)s->str + 2, "*]")) == NULL)
			return (0);
		if (p[0] != '*' || strchr(p, ']') == NULL)
			return (0);
		s->str += 1;
		genseq(s);
		return (1);
	}
	/* NOTREACHED */
}

typedef struct {
	char *name;
	int (*func)(int);
	int *set;
} CLASS;

static CLASS classes[] = {
	{ "alnum",  isalnum,  },
	{ "alpha",  isalpha,  },
	{ "blank",  isblank,  },
	{ "cntrl",  iscntrl,  },
	{ "digit",  isdigit,  },
	{ "graph",  isgraph,  },
	{ "lower",  islower,  },
	{ "print",  isprint,  },
	{ "punct",  ispunct,  },
	{ "space",  isspace,  },
	{ "upper",  isupper,  },
	{ "xdigit", isxdigit, },
};

static void
genclass(s)
	STR *s;
{
	int cnt, (*func)(int);
	CLASS *cp, tmp;
	int *p;

	tmp.name = (char *)s->str;
	if ((cp = (CLASS *)bsearch(&tmp, classes, sizeof(classes) /
	    sizeof(CLASS), sizeof(CLASS), c_class)) == NULL)
		errx(1, "unknown class %s", s->str);

	if ((cp->set = p = calloc(NCHARS + 1, sizeof(int))) == NULL)
		errx(1, "no memory for a class");
	for (cnt = 0, func = cp->func; cnt < NCHARS; ++cnt)
		if ((func)(cnt))
			*p++ = cnt;
	*p = OOBCH;

	s->cnt = 0;
	s->state = SET;
	s->set = cp->set;
}

static int
c_class(a, b)
	const void *a, *b;
{
	return (strcmp(((CLASS *)a)->name, ((CLASS *)b)->name));
}

/*
 * English doesn't have any equivalence classes, so for now
 * we just syntax check and grab the character.
 */
static void
genequiv(s)
	STR *s;
{
	if (*s->str == '\\') {
		s->equiv[0] = backslash(s);
		if (*s->str != '=')
			errx(1, "misplaced equivalence equals sign");
	} else {
		s->equiv[0] = s->str[0];
		if (s->str[1] != '=')
			errx(1, "misplaced equivalence equals sign");
	}
	s->str += 2;
	s->cnt = 0;
	s->state = SET;
	s->set = s->equiv;
}

static int
genrange(s)
	STR *s;
{
	int stopval;
	unsigned char *savestart;

	savestart = s->str;
	stopval = *++s->str == '\\' ? backslash(s) : *s->str++;
	if (stopval < (u_char)s->lastch) {
		s->str = savestart;
		return (0);
	}
	s->cnt = stopval - s->lastch + 1;
	s->state = RANGE;
	--s->lastch;
	return (1);
}

static void
genseq(s)
	STR *s;
{
	char *ep;

	if (s->which == STRING1)
		errx(1, "sequences only valid in string2");

	if (*s->str == '\\')
		s->lastch = backslash(s);
	else
		s->lastch = *s->str++;
	if (*s->str != '*')
		errx(1, "misplaced sequence asterisk");

	switch (*++s->str) {
	case '\\':
		s->cnt = backslash(s);
		break;
	case ']':
		s->cnt = 0;
		++s->str;
		break;
	default:
		if (isdigit(*s->str)) {
			s->cnt = strtol((char *)s->str, &ep, 0);
			if (*ep == ']') {
				s->str = (unsigned char *)ep + 1;
				break;
			}
		}
		errx(1, "illegal sequence count");
		/* NOTREACHED */
	}

	s->state = s->cnt ? SEQUENCE : INFINITE;
}

/*
 * Translate \??? into a character.  Up to 3 octal digits, if no digits either
 * an escape code or a literal character.
 */
static int
backslash(s)
	STR *s;
{
	int ch, cnt, val;

	for (cnt = val = 0;;) {
		ch = *++s->str;
		if (!isascii(ch) || !isdigit(ch))
			break;
		val = val * 8 + ch - '0';
		if (++cnt == 3) {
			++s->str;
			break;
		}
	}
	if (cnt)
		return (val);
	if (ch != '\0')
		++s->str;
	switch (ch) {
		case 'a':			/* escape characters */
			return ('\7');
		case 'b':
			return ('\b');
		case 'f':
			return ('\f');
		case 'n':
			return ('\n');
		case 'r':
			return ('\r');
		case 't':
			return ('\t');
		case 'v':
			return ('\13');
		case '\0':			/*  \" -> \ */
			s->state = EOS;
			return ('\\');
		default:			/* \x" -> x */
			return (ch);
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: str.c,v 1.12 2012/12/05 23:20:26 deraadt Exp $ */
2			/* $NetBSD: str.c,v 1.7 1995/08/31 22:13:47 jtc Exp $ */
3
4			/*-
5			* Copyright (c) 1991, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/types.h>
34
35			#include <errno.h>
36			#include <stddef.h>
37			#include <stdio.h>
38			#include <stdlib.h>
39			#include <string.h>
40			#include <ctype.h>
41			#include <err.h>
42
43			#include "extern.h"
44
45			static int backslash(STR *);
46			static int bracket(STR *);
47			static int c_class(const void , const void );
48			static void genclass(STR *);
49			static void genequiv(STR *);
50			static int genrange(STR *);
51			static void genseq(STR *);
52
53			int
54			next(s)
55			STR *s;
56		20	{
57			int ch;
58
59	✗✗✓✗ ✗✗✗	20	switch (s->state) {
60			case EOS:
61			return (0);
62			case INFINITE:
63			return (1);
64			case NORMAL:
65	✓✓✗✓	20	switch (ch = *s->str) {
66			case '\0':
67		10	s->state = EOS;
68		10	return (0);
69			case '\\':
70		5	s->lastch = backslash(s);
71		5	break;
72			case '[':
73			if (bracket(s))
74			return (next(s));
75			/* FALLTHROUGH */
76			default:
77		5	++s->str;
78		5	s->lastch = ch;
79			break;
80			}
81
82			/* We can start a range at any time. */
83	✗✓✗✗	10	if (s->str[0] == '-' && genrange(s))
84			return (next(s));
85		10	return (1);
86			case RANGE:
87			if (s->cnt-- == 0) {
88			s->state = NORMAL;
89			return (next(s));
90			}
91			++s->lastch;
92			return (1);
93			case SEQUENCE:
94			if (s->cnt-- == 0) {
95			s->state = NORMAL;
96			return (next(s));
97			}
98			return (1);
99			case SET:
100			if ((s->lastch = s->set[s->cnt++]) == OOBCH) {
101			s->state = NORMAL;
102			return (next(s));
103			}
104			return (1);
105			default:
106			return 0;
107			}
108			/* NOTREACHED */
109			}
110
111			static int
112			bracket(s)
113			STR *s;
114			{
115			char *p;
116
117			switch (s->str[1]) {
118			case ':': /* "[:class:]" */
119			if ((p = strstr((char *)s->str + 2, ":]")) == NULL)
120			return (0);
121			*p = '\0';
122			s->str += 2;
123			genclass(s);
124			s->str = (unsigned char *)p + 2;
125			return (1);
126			case '=': /* "[=equiv=]" */
127			if ((p = strstr((char *)s->str + 2, "=]")) == NULL)
128			return (0);
129			s->str += 2;
130			genequiv(s);
131			return (1);
132			default: /* "[\###n]" or "[#n]" */
133			if ((p = strpbrk((char )s->str + 2, "]")) == NULL)
134			return (0);
135			if (p[0] != '*' \|\| strchr(p, ']') == NULL)
136			return (0);
137			s->str += 1;
138			genseq(s);
139			return (1);
140			}
141			/* NOTREACHED */
142			}
143
144			typedef struct {
145			char *name;
146			int (*func)(int);
147			int *set;
148			} CLASS;
149
150			static CLASS classes[] = {
151			{ "alnum", isalnum, },
152			{ "alpha", isalpha, },
153			{ "blank", isblank, },
154			{ "cntrl", iscntrl, },
155			{ "digit", isdigit, },
156			{ "graph", isgraph, },
157			{ "lower", islower, },
158			{ "print", isprint, },
159			{ "punct", ispunct, },
160			{ "space", isspace, },
161			{ "upper", isupper, },
162			{ "xdigit", isxdigit, },
163			};
164
165			static void
166			genclass(s)
167			STR *s;
168			{
169			int cnt, (*func)(int);
170			CLASS *cp, tmp;
171			int *p;
172
173			tmp.name = (char *)s->str;
174			if ((cp = (CLASS *)bsearch(&tmp, classes, sizeof(classes) /
175			sizeof(CLASS), sizeof(CLASS), c_class)) == NULL)
176			errx(1, "unknown class %s", s->str);
177
178			if ((cp->set = p = calloc(NCHARS + 1, sizeof(int))) == NULL)
179			errx(1, "no memory for a class");
180			for (cnt = 0, func = cp->func; cnt < NCHARS; ++cnt)
181			if ((func)(cnt))
182			*p++ = cnt;
183			*p = OOBCH;
184
185			s->cnt = 0;
186			s->state = SET;
187			s->set = cp->set;
188			}
189
190			static int
191			c_class(a, b)
192			const void a, b;
193			{
194			return (strcmp(((CLASS )a)->name, ((CLASS )b)->name));
195			}
196
197			/*
198			* English doesn't have any equivalence classes, so for now
199			* we just syntax check and grab the character.
200			*/
201			static void
202			genequiv(s)
203			STR *s;
204			{
205			if (*s->str == '\\') {
206			s->equiv[0] = backslash(s);
207			if (*s->str != '=')
208			errx(1, "misplaced equivalence equals sign");
209			} else {
210			s->equiv[0] = s->str[0];
211			if (s->str[1] != '=')
212			errx(1, "misplaced equivalence equals sign");
213			}
214			s->str += 2;
215			s->cnt = 0;
216			s->state = SET;
217			s->set = s->equiv;
218			}
219
220			static int
221			genrange(s)
222			STR *s;
223			{
224			int stopval;
225			unsigned char *savestart;
226
227			savestart = s->str;
228			stopval = ++s->str == '\\' ? backslash(s) : s->str++;
229			if (stopval < (u_char)s->lastch) {
230			s->str = savestart;
231			return (0);
232			}
233			s->cnt = stopval - s->lastch + 1;
234			s->state = RANGE;
235			--s->lastch;
236			return (1);
237			}
238
239			static void
240			genseq(s)
241			STR *s;
242			{
243			char *ep;
244
245			if (s->which == STRING1)
246			errx(1, "sequences only valid in string2");
247
248			if (*s->str == '\\')
249			s->lastch = backslash(s);
250			else
251			s->lastch = *s->str++;
252			if (s->str != '')
253			errx(1, "misplaced sequence asterisk");
254
255			switch (*++s->str) {
256			case '\\':
257			s->cnt = backslash(s);
258			break;
259			case ']':
260			s->cnt = 0;
261			++s->str;
262			break;
263			default:
264			if (isdigit(*s->str)) {
265			s->cnt = strtol((char *)s->str, &ep, 0);
266			if (*ep == ']') {
267			s->str = (unsigned char *)ep + 1;
268			break;
269			}
270			}
271			errx(1, "illegal sequence count");
272			/* NOTREACHED */
273			}
274
275			s->state = s->cnt ? SEQUENCE : INFINITE;
276			}
277
278			/*
279			* Translate \??? into a character. Up to 3 octal digits, if no digits either
280			* an escape code or a literal character.
281			*/
282			static int
283			backslash(s)
284			STR *s;
285		5	{
286			int ch, cnt, val;
287
288		5	for (cnt = val = 0;;) {
289		7	ch = *++s->str;
290	✓✗✓✓	7	if (!isascii(ch) \|\| !isdigit(ch))
291			break;
292		3	val = val * 8 + ch - '0';
293	✓✓	3	if (++cnt == 3) {
294		1	++s->str;
295		1	break;
296			}
297			}
298	✓✓	5	if (cnt)
299		1	return (val);
300	✓✗	4	if (ch != '\0')
301		4	++s->str;
302	✗✗✗✓ ✗✗✗✗ ✗	4	switch (ch) {
303			case 'a': /* escape characters */
304			return ('\7');
305			case 'b':
306			return ('\b');
307			case 'f':
308			return ('\f');
309			case 'n':
310		4	return ('\n');
311			case 'r':
312			return ('\r');
313			case 't':
314			return ('\t');
315			case 'v':
316			return ('\13');
317			case '\0': /* \" -> \ */
318			s->state = EOS;
319			return ('\\');
320			default: /* \x" -> x */
321			return (ch);
322			}
323			}