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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/mandoc/mandoc.c	Lines:	0	219	0.0 %
Date:	2016-12-06	Branches:	0	199	0.0 %


/*	$OpenBSD: mandoc.c,v 1.66 2015/11/12 22:43:30 schwarze Exp $ */
/*
 * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2011-2015 Ingo Schwarze <schwarze@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include <sys/types.h>

#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>

#include "mandoc.h"
#include "mandoc_aux.h"
#include "libmandoc.h"

static	int	 a2time(time_t *, const char *, const char *);
static	char	*time2a(time_t);


enum mandoc_esc
mandoc_escape(const char **end, const char **start, int *sz)
{
	const char	*local_start;
	int		 local_sz;
	char		 term;
	enum mandoc_esc	 gly;

	/*
	 * When the caller doesn't provide return storage,
	 * use local storage.
	 */

	if (NULL == start)
		start = &local_start;
	if (NULL == sz)
		sz = &local_sz;

	/*
	 * Beyond the backslash, at least one input character
	 * is part of the escape sequence.  With one exception
	 * (see below), that character won't be returned.
	 */

	gly = ESCAPE_ERROR;
	*start = ++*end;
	*sz = 0;
	term = '\0';

	switch ((*start)[-1]) {
	/*
	 * First the glyphs.  There are several different forms of
	 * these, but each eventually returns a substring of the glyph
	 * name.
	 */
	case '(':
		gly = ESCAPE_SPECIAL;
		*sz = 2;
		break;
	case '[':
		gly = ESCAPE_SPECIAL;
		term = ']';
		break;
	case 'C':
		if ('\'' != **start)
			return ESCAPE_ERROR;
		*start = ++*end;
		gly = ESCAPE_SPECIAL;
		term = '\'';
		break;

	/*
	 * Escapes taking no arguments at all.
	 */
	case 'd':
	case 'u':
	case ',':
	case '/':
		return ESCAPE_IGNORE;

	/*
	 * The \z escape is supposed to output the following
	 * character without advancing the cursor position.
	 * Since we are mostly dealing with terminal mode,
	 * let us just skip the next character.
	 */
	case 'z':
		return ESCAPE_SKIPCHAR;

	/*
	 * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
	 * 'X' is the trigger.  These have opaque sub-strings.
	 */
	case 'F':
	case 'g':
	case 'k':
	case 'M':
	case 'm':
	case 'n':
	case 'V':
	case 'Y':
		gly = ESCAPE_IGNORE;
		/* FALLTHROUGH */
	case 'f':
		if (ESCAPE_ERROR == gly)
			gly = ESCAPE_FONT;
		switch (**start) {
		case '(':
			*start = ++*end;
			*sz = 2;
			break;
		case '[':
			*start = ++*end;
			term = ']';
			break;
		default:
			*sz = 1;
			break;
		}
		break;

	/*
	 * These escapes are of the form \X'Y', where 'X' is the trigger
	 * and 'Y' is any string.  These have opaque sub-strings.
	 * The \B and \w escapes are handled in roff.c, roff_res().
	 */
	case 'A':
	case 'b':
	case 'D':
	case 'R':
	case 'X':
	case 'Z':
		gly = ESCAPE_IGNORE;
		/* FALLTHROUGH */
	case 'o':
		if (**start == '\0')
			return ESCAPE_ERROR;
		if (gly == ESCAPE_ERROR)
			gly = ESCAPE_OVERSTRIKE;
		term = **start;
		*start = ++*end;
		break;

	/*
	 * These escapes are of the form \X'N', where 'X' is the trigger
	 * and 'N' resolves to a numerical expression.
	 */
	case 'h':
	case 'H':
	case 'L':
	case 'l':
	case 'S':
	case 'v':
	case 'x':
		if (strchr(" %&()*+-./0123456789:<=>", **start)) {
			if ('\0' != **start)
				++*end;
			return ESCAPE_ERROR;
		}
		gly = ESCAPE_IGNORE;
		term = **start;
		*start = ++*end;
		break;

	/*
	 * Special handling for the numbered character escape.
	 * XXX Do any other escapes need similar handling?
	 */
	case 'N':
		if ('\0' == **start)
			return ESCAPE_ERROR;
		(*end)++;
		if (isdigit((unsigned char)**start)) {
			*sz = 1;
			return ESCAPE_IGNORE;
		}
		(*start)++;
		while (isdigit((unsigned char)**end))
			(*end)++;
		*sz = *end - *start;
		if ('\0' != **end)
			(*end)++;
		return ESCAPE_NUMBERED;

	/*
	 * Sizes get a special category of their own.
	 */
	case 's':
		gly = ESCAPE_IGNORE;

		/* See +/- counts as a sign. */
		if ('+' == **end || '-' == **end || ASCII_HYPH == **end)
			*start = ++*end;

		switch (**end) {
		case '(':
			*start = ++*end;
			*sz = 2;
			break;
		case '[':
			*start = ++*end;
			term = ']';
			break;
		case '\'':
			*start = ++*end;
			term = '\'';
			break;
		case '3':
		case '2':
		case '1':
			*sz = (*end)[-1] == 's' &&
			    isdigit((unsigned char)(*end)[1]) ? 2 : 1;
			break;
		default:
			*sz = 1;
			break;
		}

		break;

	/*
	 * Anything else is assumed to be a glyph.
	 * In this case, pass back the character after the backslash.
	 */
	default:
		gly = ESCAPE_SPECIAL;
		*start = --*end;
		*sz = 1;
		break;
	}

	assert(ESCAPE_ERROR != gly);

	/*
	 * Read up to the terminating character,
	 * paying attention to nested escapes.
	 */

	if ('\0' != term) {
		while (**end != term) {
			switch (**end) {
			case '\0':
				return ESCAPE_ERROR;
			case '\\':
				(*end)++;
				if (ESCAPE_ERROR ==
				    mandoc_escape(end, NULL, NULL))
					return ESCAPE_ERROR;
				break;
			default:
				(*end)++;
				break;
			}
		}
		*sz = (*end)++ - *start;
	} else {
		assert(*sz > 0);
		if ((size_t)*sz > strlen(*start))
			return ESCAPE_ERROR;
		*end += *sz;
	}

	/* Run post-processors. */

	switch (gly) {
	case ESCAPE_FONT:
		if (2 == *sz) {
			if ('C' == **start) {
				/*
				 * Treat constant-width font modes
				 * just like regular font modes.
				 */
				(*start)++;
				(*sz)--;
			} else {
				if ('B' == (*start)[0] && 'I' == (*start)[1])
					gly = ESCAPE_FONTBI;
				break;
			}
		} else if (1 != *sz)
			break;

		switch (**start) {
		case '3':
		case 'B':
			gly = ESCAPE_FONTBOLD;
			break;
		case '2':
		case 'I':
			gly = ESCAPE_FONTITALIC;
			break;
		case 'P':
			gly = ESCAPE_FONTPREV;
			break;
		case '1':
		case 'R':
			gly = ESCAPE_FONTROMAN;
			break;
		}
		break;
	case ESCAPE_SPECIAL:
		if (1 == *sz && 'c' == **start)
			gly = ESCAPE_NOSPACE;
		/*
		 * Unicode escapes are defined in groff as \[u0000]
		 * to \[u10FFFF], where the contained value must be
		 * a valid Unicode codepoint.  Here, however, only
		 * check the length and range.
		 */
		if (**start != 'u' || *sz < 5 || *sz > 7)
			break;
		if (*sz == 7 && ((*start)[1] != '1' || (*start)[2] != '0'))
			break;
		if (*sz == 6 && (*start)[1] == '0')
			break;
		if (*sz == 5 && (*start)[1] == 'D' &&
		    strchr("89ABCDEF", (*start)[2]) != NULL)
			break;
		if ((int)strspn(*start + 1, "0123456789ABCDEFabcdef")
		    + 1 == *sz)
			gly = ESCAPE_UNICODE;
		break;
	default:
		break;
	}

	return gly;
}

/*
 * Parse a quoted or unquoted roff-style request or macro argument.
 * Return a pointer to the parsed argument, which is either the original
 * pointer or advanced by one byte in case the argument is quoted.
 * NUL-terminate the argument in place.
 * Collapse pairs of quotes inside quoted arguments.
 * Advance the argument pointer to the next argument,
 * or to the NUL byte terminating the argument line.
 */
char *
mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
{
	char	 *start, *cp;
	int	  quoted, pairs, white;

	/* Quoting can only start with a new word. */
	start = *cpp;
	quoted = 0;
	if ('"' == *start) {
		quoted = 1;
		start++;
	}

	pairs = 0;
	white = 0;
	for (cp = start; '\0' != *cp; cp++) {

		/*
		 * Move the following text left
		 * after quoted quotes and after "\\" and "\t".
		 */
		if (pairs)
			cp[-pairs] = cp[0];

		if ('\\' == cp[0]) {
			/*
			 * In copy mode, translate double to single
			 * backslashes and backslash-t to literal tabs.
			 */
			switch (cp[1]) {
			case 't':
				cp[0] = '\t';
				/* FALLTHROUGH */
			case '\\':
				pairs++;
				cp++;
				break;
			case ' ':
				/* Skip escaped blanks. */
				if (0 == quoted)
					cp++;
				break;
			default:
				break;
			}
		} else if (0 == quoted) {
			if (' ' == cp[0]) {
				/* Unescaped blanks end unquoted args. */
				white = 1;
				break;
			}
		} else if ('"' == cp[0]) {
			if ('"' == cp[1]) {
				/* Quoted quotes collapse. */
				pairs++;
				cp++;
			} else {
				/* Unquoted quotes end quoted args. */
				quoted = 2;
				break;
			}
		}
	}

	/* Quoted argument without a closing quote. */
	if (1 == quoted)
		mandoc_msg(MANDOCERR_ARG_QUOTE, parse, ln, *pos, NULL);

	/* NUL-terminate this argument and move to the next one. */
	if (pairs)
		cp[-pairs] = '\0';
	if ('\0' != *cp) {
		*cp++ = '\0';
		while (' ' == *cp)
			cp++;
	}
	*pos += (int)(cp - start) + (quoted ? 1 : 0);
	*cpp = cp;

	if ('\0' == *cp && (white || ' ' == cp[-1]))
		mandoc_msg(MANDOCERR_SPACE_EOL, parse, ln, *pos, NULL);

	return start;
}

static int
a2time(time_t *t, const char *fmt, const char *p)
{
	struct tm	 tm;
	char		*pp;

	memset(&tm, 0, sizeof(struct tm));

	pp = strptime(p, fmt, &tm);
	if (NULL != pp && '\0' == *pp) {
		*t = mktime(&tm);
		return 1;
	}

	return 0;
}

static char *
time2a(time_t t)
{
	struct tm	*tm;
	char		*buf, *p;
	size_t		 ssz;
	int		 isz;

	tm = localtime(&t);
	if (tm == NULL)
		return NULL;

	/*
	 * Reserve space:
	 * up to 9 characters for the month (September) + blank
	 * up to 2 characters for the day + comma + blank
	 * 4 characters for the year and a terminating '\0'
	 */

	p = buf = mandoc_malloc(10 + 4 + 4 + 1);

	if ((ssz = strftime(p, 10 + 1, "%B ", tm)) == 0)
		goto fail;
	p += (int)ssz;

	/*
	 * The output format is just "%d" here, not "%2d" or "%02d".
	 * That's also the reason why we can't just format the
	 * date as a whole with "%B %e, %Y" or "%B %d, %Y".
	 * Besides, the present approach is less prone to buffer
	 * overflows, in case anybody should ever introduce the bug
	 * of looking at LC_TIME.
	 */

	if ((isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)) == -1)
		goto fail;
	p += isz;

	if (strftime(p, 4 + 1, "%Y", tm) == 0)
		goto fail;
	return buf;

fail:
	free(buf);
	return NULL;
}

char *
mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
{
	time_t		 t;

	/* No date specified: use today's date. */

	if (in == NULL || *in == '\0' || strcmp(in, "$" "Mdocdate$") == 0) {
		mandoc_msg(MANDOCERR_DATE_MISSING, parse, ln, pos, NULL);
		return time2a(time(NULL));
	}

	/* Valid mdoc(7) date format. */

	if (a2time(&t, "$" "Mdocdate: %b %d %Y $", in) ||
	    a2time(&t, "%b %d, %Y", in))
		return time2a(t);

	/* Do not warn about the legacy man(7) format. */

	if ( ! a2time(&t, "%Y-%m-%d", in))
		mandoc_msg(MANDOCERR_DATE_BAD, parse, ln, pos, in);

	/* Use any non-mdoc(7) date verbatim. */

	return mandoc_strdup(in);
}

int
mandoc_eos(const char *p, size_t sz)
{
	const char	*q;
	int		 enclosed, found;

	if (0 == sz)
		return 0;

	/*
	 * End-of-sentence recognition must include situations where
	 * some symbols, such as `)', allow prior EOS punctuation to
	 * propagate outward.
	 */

	enclosed = found = 0;
	for (q = p + (int)sz - 1; q >= p; q--) {
		switch (*q) {
		case '\"':
		case '\'':
		case ']':
		case ')':
			if (0 == found)
				enclosed = 1;
			break;
		case '.':
		case '!':
		case '?':
			found = 1;
			break;
		default:
			return found &&
			    (!enclosed || isalnum((unsigned char)*q));
		}
	}

	return found && !enclosed;
}

/*
 * Convert a string to a long that may not be <0.
 * If the string is invalid, or is less than 0, return -1.
 */
int
mandoc_strntoi(const char *p, size_t sz, int base)
{
	char		 buf[32];
	char		*ep;
	long		 v;

	if (sz > 31)
		return -1;

	memcpy(buf, p, sz);
	buf[(int)sz] = '\0';

	errno = 0;
	v = strtol(buf, &ep, base);

	if (buf[0] == '\0' || *ep != '\0')
		return -1;

	if (v > INT_MAX)
		v = INT_MAX;
	if (v < INT_MIN)
		v = INT_MIN;

	return (int)v;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: mandoc.c,v 1.66 2015/11/12 22:43:30 schwarze Exp $ */
2			/*
3			* Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
4			* Copyright (c) 2011-2015 Ingo Schwarze <schwarze@openbsd.org>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18			#include <sys/types.h>
19
20			#include <assert.h>
21			#include <ctype.h>
22			#include <errno.h>
23			#include <limits.h>
24			#include <stdlib.h>
25			#include <stdio.h>
26			#include <string.h>
27			#include <time.h>
28
29			#include "mandoc.h"
30			#include "mandoc_aux.h"
31			#include "libmandoc.h"
32
33			static int a2time(time_t , const char , const char *);
34			static char *time2a(time_t);
35
36
37			enum mandoc_esc
38			mandoc_escape(const char end, const char start, int *sz)
39			{
40			const char *local_start;
41			int local_sz;
42			char term;
43			enum mandoc_esc gly;
44
45			/*
46			* When the caller doesn't provide return storage,
47			* use local storage.
48			*/
49
50			if (NULL == start)
51			start = &local_start;
52			if (NULL == sz)
53			sz = &local_sz;
54
55			/*
56			* Beyond the backslash, at least one input character
57			* is part of the escape sequence. With one exception
58			* (see below), that character won't be returned.
59			*/
60
61			gly = ESCAPE_ERROR;
62			start = ++end;
63			*sz = 0;
64			term = '\0';
65
66			switch ((*start)[-1]) {
67			/*
68			* First the glyphs. There are several different forms of
69			* these, but each eventually returns a substring of the glyph
70			* name.
71			*/
72			case '(':
73			gly = ESCAPE_SPECIAL;
74			*sz = 2;
75			break;
76			case '[':
77			gly = ESCAPE_SPECIAL;
78			term = ']';
79			break;
80			case 'C':
81			if ('\'' != **start)
82			return ESCAPE_ERROR;
83			start = ++end;
84			gly = ESCAPE_SPECIAL;
85			term = '\'';
86			break;
87
88			/*
89			* Escapes taking no arguments at all.
90			*/
91			case 'd':
92			case 'u':
93			case ',':
94			case '/':
95			return ESCAPE_IGNORE;
96
97			/*
98			* The \z escape is supposed to output the following
99			* character without advancing the cursor position.
100			* Since we are mostly dealing with terminal mode,
101			* let us just skip the next character.
102			*/
103			case 'z':
104			return ESCAPE_SKIPCHAR;
105
106			/*
107			* Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
108			* 'X' is the trigger. These have opaque sub-strings.
109			*/
110			case 'F':
111			case 'g':
112			case 'k':
113			case 'M':
114			case 'm':
115			case 'n':
116			case 'V':
117			case 'Y':
118			gly = ESCAPE_IGNORE;
119			/* FALLTHROUGH */
120			case 'f':
121			if (ESCAPE_ERROR == gly)
122			gly = ESCAPE_FONT;
123			switch (**start) {
124			case '(':
125			start = ++end;
126			*sz = 2;
127			break;
128			case '[':
129			start = ++end;
130			term = ']';
131			break;
132			default:
133			*sz = 1;
134			break;
135			}
136			break;
137
138			/*
139			* These escapes are of the form \X'Y', where 'X' is the trigger
140			* and 'Y' is any string. These have opaque sub-strings.
141			* The \B and \w escapes are handled in roff.c, roff_res().
142			*/
143			case 'A':
144			case 'b':
145			case 'D':
146			case 'R':
147			case 'X':
148			case 'Z':
149			gly = ESCAPE_IGNORE;
150			/* FALLTHROUGH */
151			case 'o':
152			if (**start == '\0')
153			return ESCAPE_ERROR;
154			if (gly == ESCAPE_ERROR)
155			gly = ESCAPE_OVERSTRIKE;
156			term = **start;
157			start = ++end;
158			break;
159
160			/*
161			* These escapes are of the form \X'N', where 'X' is the trigger
162			* and 'N' resolves to a numerical expression.
163			*/
164			case 'h':
165			case 'H':
166			case 'L':
167			case 'l':
168			case 'S':
169			case 'v':
170			case 'x':
171			if (strchr(" %&()+-./0123456789:<=>", *start)) {
172			if ('\0' != **start)
173			++*end;
174			return ESCAPE_ERROR;
175			}
176			gly = ESCAPE_IGNORE;
177			term = **start;
178			start = ++end;
179			break;
180
181			/*
182			* Special handling for the numbered character escape.
183			* XXX Do any other escapes need similar handling?
184			*/
185			case 'N':
186			if ('\0' == **start)
187			return ESCAPE_ERROR;
188			(*end)++;
189			if (isdigit((unsigned char)**start)) {
190			*sz = 1;
191			return ESCAPE_IGNORE;
192			}
193			(*start)++;
194			while (isdigit((unsigned char)**end))
195			(*end)++;
196			sz = end - *start;
197			if ('\0' != **end)
198			(*end)++;
199			return ESCAPE_NUMBERED;
200
201			/*
202			* Sizes get a special category of their own.
203			*/
204			case 's':
205			gly = ESCAPE_IGNORE;
206
207			/* See +/- counts as a sign. */
208			if ('+' == end \|\| '-' == end \|\| ASCII_HYPH == **end)
209			start = ++end;
210
211			switch (**end) {
212			case '(':
213			start = ++end;
214			*sz = 2;
215			break;
216			case '[':
217			start = ++end;
218			term = ']';
219			break;
220			case '\'':
221			start = ++end;
222			term = '\'';
223			break;
224			case '3':
225			case '2':
226			case '1':
227			sz = (end)[-1] == 's' &&
228			isdigit((unsigned char)(*end)[1]) ? 2 : 1;
229			break;
230			default:
231			*sz = 1;
232			break;
233			}
234
235			break;
236
237			/*
238			* Anything else is assumed to be a glyph.
239			* In this case, pass back the character after the backslash.
240			*/
241			default:
242			gly = ESCAPE_SPECIAL;
243			start = --end;
244			*sz = 1;
245			break;
246			}
247
248			assert(ESCAPE_ERROR != gly);
249
250			/*
251			* Read up to the terminating character,
252			* paying attention to nested escapes.
253			*/
254
255			if ('\0' != term) {
256			while (**end != term) {
257			switch (**end) {
258			case '\0':
259			return ESCAPE_ERROR;
260			case '\\':
261			(*end)++;
262			if (ESCAPE_ERROR ==
263			mandoc_escape(end, NULL, NULL))
264			return ESCAPE_ERROR;
265			break;
266			default:
267			(*end)++;
268			break;
269			}
270			}
271			sz = (end)++ - *start;
272			} else {
273			assert(*sz > 0);
274			if ((size_t)sz > strlen(start))
275			return ESCAPE_ERROR;
276			end += sz;
277			}
278
279			/* Run post-processors. */
280
281			switch (gly) {
282			case ESCAPE_FONT:
283			if (2 == *sz) {
284			if ('C' == **start) {
285			/*
286			* Treat constant-width font modes
287			* just like regular font modes.
288			*/
289			(*start)++;
290			(*sz)--;
291			} else {
292			if ('B' == (start)[0] && 'I' == (start)[1])
293			gly = ESCAPE_FONTBI;
294			break;
295			}
296			} else if (1 != *sz)
297			break;
298
299			switch (**start) {
300			case '3':
301			case 'B':
302			gly = ESCAPE_FONTBOLD;
303			break;
304			case '2':
305			case 'I':
306			gly = ESCAPE_FONTITALIC;
307			break;
308			case 'P':
309			gly = ESCAPE_FONTPREV;
310			break;
311			case '1':
312			case 'R':
313			gly = ESCAPE_FONTROMAN;
314			break;
315			}
316			break;
317			case ESCAPE_SPECIAL:
318			if (1 == sz && 'c' == *start)
319			gly = ESCAPE_NOSPACE;
320			/*
321			* Unicode escapes are defined in groff as \[u0000]
322			* to \[u10FFFF], where the contained value must be
323			* a valid Unicode codepoint. Here, however, only
324			* check the length and range.
325			*/
326			if (*start != 'u' \|\| sz < 5 \|\| *sz > 7)
327			break;
328			if (sz == 7 && ((start)[1] != '1' \|\| (*start)[2] != '0'))
329			break;
330			if (sz == 6 && (start)[1] == '0')
331			break;
332			if (sz == 5 && (start)[1] == 'D' &&
333			strchr("89ABCDEF", (*start)[2]) != NULL)
334			break;
335			if ((int)strspn(*start + 1, "0123456789ABCDEFabcdef")
336			+ 1 == *sz)
337			gly = ESCAPE_UNICODE;
338			break;
339			default:
340			break;
341			}
342
343			return gly;
344			}
345
346			/*
347			* Parse a quoted or unquoted roff-style request or macro argument.
348			* Return a pointer to the parsed argument, which is either the original
349			* pointer or advanced by one byte in case the argument is quoted.
350			* NUL-terminate the argument in place.
351			* Collapse pairs of quotes inside quoted arguments.
352			* Advance the argument pointer to the next argument,
353			* or to the NUL byte terminating the argument line.
354			*/
355			char *
356			mandoc_getarg(struct mparse parse, char cpp, int ln, int pos)
357			{
358			char start, cp;
359			int quoted, pairs, white;
360
361			/* Quoting can only start with a new word. */
362			start = *cpp;
363			quoted = 0;
364			if ('"' == *start) {
365			quoted = 1;
366			start++;
367			}
368
369			pairs = 0;
370			white = 0;
371			for (cp = start; '\0' != *cp; cp++) {
372
373			/*
374			* Move the following text left
375			* after quoted quotes and after "\\" and "\t".
376			*/
377			if (pairs)
378			cp[-pairs] = cp[0];
379
380			if ('\\' == cp[0]) {
381			/*
382			* In copy mode, translate double to single
383			* backslashes and backslash-t to literal tabs.
384			*/
385			switch (cp[1]) {
386			case 't':
387			cp[0] = '\t';
388			/* FALLTHROUGH */
389			case '\\':
390			pairs++;
391			cp++;
392			break;
393			case ' ':
394			/* Skip escaped blanks. */
395			if (0 == quoted)
396			cp++;
397			break;
398			default:
399			break;
400			}
401			} else if (0 == quoted) {
402			if (' ' == cp[0]) {
403			/* Unescaped blanks end unquoted args. */
404			white = 1;
405			break;
406			}
407			} else if ('"' == cp[0]) {
408			if ('"' == cp[1]) {
409			/* Quoted quotes collapse. */
410			pairs++;
411			cp++;
412			} else {
413			/* Unquoted quotes end quoted args. */
414			quoted = 2;
415			break;
416			}
417			}
418			}
419
420			/* Quoted argument without a closing quote. */
421			if (1 == quoted)
422			mandoc_msg(MANDOCERR_ARG_QUOTE, parse, ln, *pos, NULL);
423
424			/* NUL-terminate this argument and move to the next one. */
425			if (pairs)
426			cp[-pairs] = '\0';
427			if ('\0' != *cp) {
428			*cp++ = '\0';
429			while (' ' == *cp)
430			cp++;
431			}
432			*pos += (int)(cp - start) + (quoted ? 1 : 0);
433			*cpp = cp;
434
435			if ('\0' == *cp && (white \|\| ' ' == cp[-1]))
436			mandoc_msg(MANDOCERR_SPACE_EOL, parse, ln, *pos, NULL);
437
438			return start;
439			}
440
441			static int
442			a2time(time_t t, const char fmt, const char *p)
443			{
444			struct tm tm;
445			char *pp;
446
447			memset(&tm, 0, sizeof(struct tm));
448
449			pp = strptime(p, fmt, &tm);
450			if (NULL != pp && '\0' == *pp) {
451			*t = mktime(&tm);
452			return 1;
453			}
454
455			return 0;
456			}
457
458			static char *
459			time2a(time_t t)
460			{
461			struct tm *tm;
462			char buf, p;
463			size_t ssz;
464			int isz;
465
466			tm = localtime(&t);
467			if (tm == NULL)
468			return NULL;
469
470			/*
471			* Reserve space:
472			* up to 9 characters for the month (September) + blank
473			* up to 2 characters for the day + comma + blank
474			* 4 characters for the year and a terminating '\0'
475			*/
476
477			p = buf = mandoc_malloc(10 + 4 + 4 + 1);
478
479			if ((ssz = strftime(p, 10 + 1, "%B ", tm)) == 0)
480			goto fail;
481			p += (int)ssz;
482
483			/*
484			* The output format is just "%d" here, not "%2d" or "%02d".
485			* That's also the reason why we can't just format the
486			* date as a whole with "%B %e, %Y" or "%B %d, %Y".
487			* Besides, the present approach is less prone to buffer
488			* overflows, in case anybody should ever introduce the bug
489			* of looking at LC_TIME.
490			*/
491
492			if ((isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)) == -1)
493			goto fail;
494			p += isz;
495
496			if (strftime(p, 4 + 1, "%Y", tm) == 0)
497			goto fail;
498			return buf;
499
500			fail:
501			free(buf);
502			return NULL;
503			}
504
505			char *
506			mandoc_normdate(struct mparse parse, char in, int ln, int pos)
507			{
508			time_t t;
509
510			/* No date specified: use today's date. */
511
512			if (in == NULL \|\| *in == '\0' \|\| strcmp(in, "$" "Mdocdate$") == 0) {
513			mandoc_msg(MANDOCERR_DATE_MISSING, parse, ln, pos, NULL);
514			return time2a(time(NULL));
515			}
516
517			/* Valid mdoc(7) date format. */
518
519			if (a2time(&t, "$" "Mdocdate: %b %d %Y $", in) \|\|
520			a2time(&t, "%b %d, %Y", in))
521			return time2a(t);
522
523			/* Do not warn about the legacy man(7) format. */
524
525			if ( ! a2time(&t, "%Y-%m-%d", in))
526			mandoc_msg(MANDOCERR_DATE_BAD, parse, ln, pos, in);
527
528			/* Use any non-mdoc(7) date verbatim. */
529
530			return mandoc_strdup(in);
531			}
532
533			int
534			mandoc_eos(const char *p, size_t sz)
535			{
536			const char *q;
537			int enclosed, found;
538
539			if (0 == sz)
540			return 0;
541
542			/*
543			* End-of-sentence recognition must include situations where
544			* some symbols, such as `)', allow prior EOS punctuation to
545			* propagate outward.
546			*/
547
548			enclosed = found = 0;
549			for (q = p + (int)sz - 1; q >= p; q--) {
550			switch (*q) {
551			case '\"':
552			case '\'':
553			case ']':
554			case ')':
555			if (0 == found)
556			enclosed = 1;
557			break;
558			case '.':
559			case '!':
560			case '?':
561			found = 1;
562			break;
563			default:
564			return found &&
565			(!enclosed \|\| isalnum((unsigned char)*q));
566			}
567			}
568
569			return found && !enclosed;
570			}
571
572			/*
573			* Convert a string to a long that may not be <0.
574			* If the string is invalid, or is less than 0, return -1.
575			*/
576			int
577			mandoc_strntoi(const char *p, size_t sz, int base)
578			{
579			char buf[32];
580			char *ep;
581			long v;
582
583			if (sz > 31)
584			return -1;
585
586			memcpy(buf, p, sz);
587			buf[(int)sz] = '\0';
588
589			errno = 0;
590			v = strtol(buf, &ep, base);
591
592			if (buf[0] == '\0' \|\| *ep != '\0')
593			return -1;
594
595			if (v > INT_MAX)
596			v = INT_MAX;
597			if (v < INT_MIN)
598			v = INT_MIN;
599
600			return (int)v;
601			}