1/*
2 * Copyright (c) 1989 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Guido van Rossum.
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#if defined(LIBC_SCCS) && !defined(lint)
33static char sccsid[] = "@(#)glob.c	5.12 (Berkeley) 6/24/91";
34#endif /* LIBC_SCCS and not lint */
35/*
36 * Glob: the interface is a superset of the one defined in POSIX 1003.2,
37 * draft 9.
38 *
39 * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
40 *
41 * Optional extra services, controlled by flags not defined by POSIX:
42 *
43 * GLOB_QUOTE:
44 *	Escaping convention: \ inhibits any special meaning the following
45 *	character might have (except \ at end of string is retained).
46 * GLOB_MAGCHAR:
47 *	Set in gl_flags if pattern contained a globbing character.
48 * GLOB_ALTNOT:
49 *	Use ^ instead of ! for "not".
50 * gl_matchc:
51 *	Number of matches in the current invocation of glob.
52 */
53
54#ifdef WINNT_NATIVE
55	#pragma warning(disable:4244)
56#endif /* WINNT_NATIVE */
57
58#define Char __Char
59#include "sh.h"
60#include "glob.h"
61
62#ifndef HAVE_MBLEN
63#undef mblen
64#define mblen(_s,_n)	mbrlen((_s),(_n),NULL)
65#endif
66
67#undef Char
68#undef QUOTE
69#undef TILDE
70#undef META
71#undef ismeta
72#undef Strchr
73
74#ifndef S_ISDIR
75#define S_ISDIR(a)	(((a) & S_IFMT) == S_IFDIR)
76#endif
77
78#if !defined(S_ISLNK) && defined(S_IFLNK)
79#define S_ISLNK(a)	(((a) & S_IFMT) == S_IFLNK)
80#endif
81
82#if !defined(S_ISLNK) && !defined(lstat)
83#define lstat stat
84#endif
85
86typedef unsigned short Char;
87
88static	int	 glob1 		(Char *, glob_t *, int);
89static	int	 glob2		(struct strbuf *, const Char *, glob_t *, int);
90static	int	 glob3		(struct strbuf *, const Char *, const Char *,
91				 const Char *, glob_t *, int);
92static	void	 globextend	(const char *, glob_t *);
93static	int	 match		(const char *, const Char *, const Char *,
94				 int);
95static	int	 compare	(const void *, const void *);
96static 	DIR	*Opendir	(const char *);
97#ifdef S_IFLNK
98static	int	 Lstat		(const char *, struct stat *);
99#endif
100static	int	 Stat		(const char *, struct stat *sb);
101static 	Char 	*Strchr		(Char *, int);
102#ifdef DEBUG
103static	void	 qprintf	(const char *, const Char *);
104#endif
105
106#define	DOLLAR		'$'
107#define	DOT		'.'
108#define	EOS		'\0'
109#define	LBRACKET	'['
110#define	NOT		'!'
111#define ALTNOT		'^'
112#define	QUESTION	'?'
113#define	QUOTE		'\\'
114#define	RANGE		'-'
115#define	RBRACKET	']'
116#define	SEP		'/'
117#define	STAR		'*'
118#define	TILDE		'~'
119#define	UNDERSCORE	'_'
120
121#define	M_META		0x8000
122#define M_PROTECT	0x4000
123#define	M_MASK		0xffff
124#define	M_ASCII		0x00ff
125
126#define	LCHAR(c)	((c)&M_ASCII)
127#define	META(c)		((c)|M_META)
128#define	M_ALL		META('*')
129#define	M_END		META(']')
130#define	M_NOT		META('!')
131#define	M_ALTNOT	META('^')
132#define	M_ONE		META('?')
133#define	M_RNG		META('-')
134#define	M_SET		META('[')
135#define	ismeta(c)	(((c)&M_META) != 0)
136
137int
138globcharcoll(__Char c1, __Char c2, int cs)
139{
140#if defined(NLS) && defined(LC_COLLATE) && defined(HAVE_STRCOLL)
141# if defined(WIDE_STRINGS)
142    wchar_t s1[2], s2[2];
143
144    if (c1 == c2)
145	return (0);
146    if (cs) {
147	c1 = towlower(c1);
148	c2 = towlower(c2);
149    } else {
150#ifndef __FreeBSD__
151	/* This should not be here, but I'll rather leave it in than engage in
152	   a LC_COLLATE flamewar about a shell I don't use... */
153	if (iswlower(c1) && iswupper(c2))
154	    return (1);
155	if (iswupper(c1) && iswlower(c2))
156	    return (-1);
157#endif
158    }
159    s1[0] = c1;
160    s2[0] = c2;
161    s1[1] = s2[1] = '\0';
162    return wcscoll(s1, s2);
163# else /* not WIDE_STRINGS */
164    char s1[2], s2[2];
165
166    if (c1 == c2)
167	return (0);
168    /*
169     * From kevin lyda <kevin@suberic.net>:
170     * strcoll does not guarantee case sorting, so we pre-process now:
171     */
172    if (cs) {
173	c1 = islower(c1) ? c1 : tolower(c1);
174	c2 = islower(c2) ? c2 : tolower(c2);
175    } else {
176	if (islower(c1) && isupper(c2))
177	    return (1);
178	if (isupper(c1) && islower(c2))
179	    return (-1);
180    }
181    s1[0] = c1;
182    s2[0] = c2;
183    s1[1] = s2[1] = '\0';
184    return strcoll(s1, s2);
185# endif
186#else
187    return (c1 - c2);
188#endif
189}
190
191/*
192 * Need to dodge two kernel bugs:
193 * opendir("") != opendir(".")
194 * NAMEI_BUG: on plain files trailing slashes are ignored in some kernels.
195 *            POSIX specifies that they should be ignored in directories.
196 */
197
198static DIR *
199Opendir(const char *str)
200{
201#if defined(hpux) || defined(__hpux)
202    struct stat st;
203#endif
204
205    if (!*str)
206	return (opendir("."));
207#if defined(hpux) || defined(__hpux)
208    /*
209     * Opendir on some device files hangs, so avoid it
210     */
211    if (stat(str, &st) == -1 || !S_ISDIR(st.st_mode))
212	return NULL;
213#endif
214    return opendir(str);
215}
216
217#ifdef S_IFLNK
218static int
219Lstat(const char *fn, struct stat *sb)
220{
221    int st;
222
223    st = lstat(fn, sb);
224# ifdef NAMEI_BUG
225    if (*fn != 0 && strend(fn)[-1] == '/' && !S_ISDIR(sb->st_mode))
226	st = -1;
227# endif	/* NAMEI_BUG */
228    return st;
229}
230#else
231#define Lstat Stat
232#endif /* S_IFLNK */
233
234static int
235Stat(const char *fn, struct stat *sb)
236{
237    int st;
238
239    st = stat(fn, sb);
240#ifdef NAMEI_BUG
241    if (*fn != 0 && strend(fn)[-1] == '/' && !S_ISDIR(sb->st_mode))
242	st = -1;
243#endif /* NAMEI_BUG */
244    return st;
245}
246
247static Char *
248Strchr(Char *str, int ch)
249{
250    do
251	if (*str == ch)
252	    return (str);
253    while (*str++);
254    return (NULL);
255}
256
257#ifdef DEBUG
258static void
259qprintf(const char *pre, const Char *s)
260{
261    const Char *p;
262
263    xprintf("%s", pre);
264    for (p = s; *p; p++)
265	xprintf("%c", *p & 0xff);
266    xprintf("\n%s", pre);
267    for (p = s; *p; p++)
268	xprintf("%c", *p & M_PROTECT ? '"' : ' ');
269    xprintf("\n%s", pre);
270    for (p = s; *p; p++)
271	xprintf("%c", *p & M_META ? '_' : ' ');
272    xprintf("\n");
273}
274#endif /* DEBUG */
275
276static int
277compare(const void *p, const void *q)
278{
279#if defined(NLS) && defined(HAVE_STRCOLL)
280    return (strcoll(*(char *const *) p, *(char *const *) q));
281#else
282    return (strcmp(*(char *const *) p, *(char *const *) q));
283#endif /* NLS && HAVE_STRCOLL */
284}
285
286/*
287 * The main glob() routine: compiles the pattern (optionally processing
288 * quotes), calls glob1() to do the real pattern matching, and finally
289 * sorts the list (unless unsorted operation is requested).  Returns 0
290 * if things went well, nonzero if errors occurred.  It is not an error
291 * to find no matches.
292 */
293int
294glob(const char *pattern, int flags, int (*errfunc) (const char *, int),
295     glob_t *pglob)
296{
297    int     err, oldpathc;
298    Char *bufnext, m_not;
299    const unsigned char *patnext;
300    int     c, not;
301    Char *qpatnext, *patbuf;
302    int     no_match;
303
304    patnext = (const unsigned char *) pattern;
305    if (!(flags & GLOB_APPEND)) {
306	pglob->gl_pathc = 0;
307	pglob->gl_pathv = NULL;
308	if (!(flags & GLOB_DOOFFS))
309	    pglob->gl_offs = 0;
310    }
311    pglob->gl_flags = flags & ~GLOB_MAGCHAR;
312    pglob->gl_errfunc = errfunc;
313    oldpathc = pglob->gl_pathc;
314    pglob->gl_matchc = 0;
315
316    if (pglob->gl_flags & GLOB_ALTNOT) {
317	not = ALTNOT;
318	m_not = M_ALTNOT;
319    }
320    else {
321	not = NOT;
322	m_not = M_NOT;
323    }
324
325    patbuf = xmalloc((strlen(pattern) + 1) * sizeof(*patbuf));
326    bufnext = patbuf;
327
328    no_match = *patnext == not;
329    if (no_match)
330	patnext++;
331
332    if (flags & GLOB_QUOTE) {
333	/* Protect the quoted characters */
334	while ((c = *patnext++) != EOS) {
335#ifdef WIDE_STRINGS
336	    int len;
337
338	    len = mblen((const char *)(patnext - 1), MB_LEN_MAX);
339	    if (len == -1)
340		TCSH_IGNORE(mblen(NULL, 0));
341	    else if (len > 1) {
342		*bufnext++ = (Char) c;
343		while (--len != 0)
344		    *bufnext++ = (Char) (*patnext++ | M_PROTECT);
345	    } else
346#endif /* WIDE_STRINGS */
347	    if (c == QUOTE) {
348		if ((c = *patnext++) == EOS) {
349		    c = QUOTE;
350		    --patnext;
351		}
352		*bufnext++ = (Char) (c | M_PROTECT);
353	    }
354	    else
355		*bufnext++ = (Char) c;
356	}
357    }
358    else
359	while ((c = *patnext++) != EOS)
360	    *bufnext++ = (Char) c;
361    *bufnext = EOS;
362
363    bufnext = patbuf;
364    qpatnext = patbuf;
365    while ((c = *qpatnext++) != EOS) {
366	switch (c) {
367	case LBRACKET:
368	    c = *qpatnext;
369	    if (c == not)
370		++qpatnext;
371	    if (*qpatnext == EOS ||
372		Strchr(qpatnext + 1, RBRACKET) == NULL) {
373		*bufnext++ = LBRACKET;
374		if (c == not)
375		    --qpatnext;
376		break;
377	    }
378	    pglob->gl_flags |= GLOB_MAGCHAR;
379	    *bufnext++ = M_SET;
380	    if (c == not)
381		*bufnext++ = m_not;
382	    c = *qpatnext++;
383	    do {
384		*bufnext++ = LCHAR(c);
385		if (*qpatnext == RANGE &&
386		    (c = qpatnext[1]) != RBRACKET) {
387		    *bufnext++ = M_RNG;
388		    *bufnext++ = LCHAR(c);
389		    qpatnext += 2;
390		}
391	    } while ((c = *qpatnext++) != RBRACKET);
392	    *bufnext++ = M_END;
393	    break;
394	case QUESTION:
395	    pglob->gl_flags |= GLOB_MAGCHAR;
396	    *bufnext++ = M_ONE;
397	    break;
398	case STAR:
399	    pglob->gl_flags |= GLOB_MAGCHAR;
400	    /* collapse adjacent stars to one [or three if globstar],
401	     * to avoid exponential behavior
402	     */
403	    if (bufnext == patbuf || bufnext[-1] != M_ALL ||
404	       ((flags & GLOB_STAR) != 0 &&
405		 (bufnext - 1 == patbuf || bufnext[-2] != M_ALL ||
406		 bufnext - 2 == patbuf || bufnext[-3] != M_ALL)))
407		*bufnext++ = M_ALL;
408	    break;
409	default:
410	    *bufnext++ = LCHAR(c);
411	    break;
412	}
413    }
414    *bufnext = EOS;
415#ifdef DEBUG
416    qprintf("patbuf=", patbuf);
417#endif
418
419    if ((err = glob1(patbuf, pglob, no_match)) != 0) {
420	xfree(patbuf);
421	return (err);
422    }
423
424    /*
425     * If there was no match we are going to append the pattern
426     * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
427     * and the pattern did not contain any magic characters
428     * GLOB_NOMAGIC is there just for compatibility with csh.
429     */
430    if (pglob->gl_pathc == oldpathc &&
431	((flags & GLOB_NOCHECK) ||
432	 ((flags & GLOB_NOMAGIC) && !(pglob->gl_flags & GLOB_MAGCHAR)))) {
433	if (!(flags & GLOB_QUOTE))
434	    globextend(pattern, pglob);
435	else {
436	    char *copy, *dest;
437	    const char *src;
438
439	    /* copy pattern, interpreting quotes */
440	    copy = xmalloc(strlen(pattern) + 1);
441	    dest = copy;
442	    src = pattern;
443	    while (*src != EOS) {
444		/* Don't interpret quotes. The spec does not say we should do */
445		if (*src == QUOTE) {
446		    if (*++src == EOS)
447			--src;
448		}
449		*dest++ = *src++;
450	    }
451	    *dest = EOS;
452	    globextend(copy, pglob);
453	    xfree(copy);
454	}
455	xfree(patbuf);
456	return 0;
457    }
458    else if (!(flags & GLOB_NOSORT) && (pglob->gl_pathc != oldpathc))
459	qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
460	      pglob->gl_pathc - oldpathc, sizeof(char *), compare);
461    xfree(patbuf);
462    return (0);
463}
464
465static int
466glob1(Char *pattern, glob_t *pglob, int no_match)
467{
468    struct strbuf pathbuf = strbuf_INIT;
469    int err;
470
471    /*
472     * a null pathname is invalid -- POSIX 1003.1 sect. 2.4.
473     */
474    if (*pattern == EOS)
475	return (0);
476    err = glob2(&pathbuf, pattern, pglob, no_match);
477    xfree(pathbuf.s);
478    return err;
479}
480
481/*
482 * functions glob2 and glob3 are mutually recursive; there is one level
483 * of recursion for each segment in the pattern that contains one or
484 * more meta characters.
485 */
486static int
487glob2(struct strbuf *pathbuf, const Char *pattern, glob_t *pglob, int no_match)
488{
489    struct stat sbuf;
490    int anymeta;
491    const Char *p;
492    size_t orig_len;
493
494    /*
495     * loop over pattern segments until end of pattern or until segment with
496     * meta character found.
497     */
498    anymeta = 0;
499    for (;;) {
500	if (*pattern == EOS) {	/* end of pattern? */
501	    strbuf_terminate(pathbuf);
502
503	    if (Lstat(pathbuf->s, &sbuf))
504		return (0);
505
506	    if (((pglob->gl_flags & GLOB_MARK) &&
507		 pathbuf->s[pathbuf->len - 1] != SEP) &&
508		(S_ISDIR(sbuf.st_mode)
509#ifdef S_IFLNK
510		 || (S_ISLNK(sbuf.st_mode) &&
511		     (Stat(pathbuf->s, &sbuf) == 0) &&
512		     S_ISDIR(sbuf.st_mode))
513#endif
514		 )) {
515		strbuf_append1(pathbuf, SEP);
516		strbuf_terminate(pathbuf);
517	    }
518	    ++pglob->gl_matchc;
519	    globextend(pathbuf->s, pglob);
520	    return 0;
521	}
522
523	/* find end of next segment, tentatively copy to pathbuf */
524	p = pattern;
525	orig_len = pathbuf->len;
526	while (*p != EOS && *p != SEP) {
527	    if (ismeta(*p))
528		anymeta = 1;
529	    strbuf_append1(pathbuf, *p++);
530	}
531
532	if (!anymeta) {		/* no expansion, do next segment */
533	    pattern = p;
534	    while (*pattern == SEP)
535		strbuf_append1(pathbuf, *pattern++);
536	}
537	else {			/* need expansion, recurse */
538	    pathbuf->len = orig_len;
539	    return (glob3(pathbuf, pattern, p, pattern, pglob, no_match));
540	}
541    }
542    /* NOTREACHED */
543}
544
545static size_t
546One_Char_mbtowc(__Char *pwc, const Char *s, size_t n)
547{
548#ifdef WIDE_STRINGS
549    char buf[MB_LEN_MAX], *p;
550
551    if (n > MB_LEN_MAX)
552	n = MB_LEN_MAX;
553    p = buf;
554    while (p < buf + n && (*p++ = LCHAR(*s++)) != 0)
555	;
556    return one_mbtowc(pwc, buf, n);
557#else
558    *pwc = *s & CHAR;
559    return 1;
560#endif
561}
562
563static int
564glob3(struct strbuf *pathbuf, const Char *pattern, const Char *restpattern,
565      const Char *pglobstar, glob_t *pglob, int no_match)
566{
567    DIR    *dirp;
568    struct dirent *dp;
569    struct stat sbuf;
570    int     err;
571    Char m_not = (pglob->gl_flags & GLOB_ALTNOT) ? M_ALTNOT : M_NOT;
572    size_t orig_len;
573    int globstar = 0;
574    int chase_symlinks = 0;
575    const Char *termstar = NULL;
576
577    strbuf_terminate(pathbuf);
578    orig_len = pathbuf->len;
579    errno = err = 0;
580
581    while (pglobstar < restpattern) {
582	__Char wc;
583	size_t width = One_Char_mbtowc(&wc, pglobstar, MB_LEN_MAX);
584	if ((pglobstar[0] & M_MASK) == M_ALL &&
585	    (pglobstar[width] & M_MASK) == M_ALL) {
586	    globstar = 1;
587	    chase_symlinks = (pglobstar[2 * width] & M_MASK) == M_ALL;
588	    termstar = pglobstar + (2 + chase_symlinks) * width;
589	    break;
590	}
591        pglobstar += width;
592    }
593
594    if (globstar) {
595	err = pglobstar==pattern && termstar==restpattern ?
596		*restpattern == EOS ?
597		glob2(pathbuf, restpattern - 1, pglob, no_match) :
598		glob2(pathbuf, restpattern + 1, pglob, no_match) :
599		glob3(pathbuf, pattern, restpattern, termstar, pglob, no_match);
600	if (err)
601	    return err;
602	pathbuf->len = orig_len;
603	strbuf_terminate(pathbuf);
604    }
605
606    if (*pathbuf->s && (Lstat(pathbuf->s, &sbuf) || !S_ISDIR(sbuf.st_mode)
607#ifdef S_IFLINK
608	     && ((globstar && !chase_symlinks) || !S_ISLNK(sbuf.st_mode))
609#endif
610	))
611	return 0;
612
613    if (!(dirp = Opendir(pathbuf->s))) {
614	/* todo: don't call for ENOENT or ENOTDIR? */
615	if ((pglob->gl_errfunc && (*pglob->gl_errfunc) (pathbuf->s, errno)) ||
616	    (pglob->gl_flags & GLOB_ERR))
617	    return (GLOB_ABEND);
618	else
619	    return (0);
620    }
621
622    /* search directory for matching names */
623    while ((dp = readdir(dirp)) != NULL) {
624	/* initial DOT must be matched literally */
625	if (dp->d_name[0] == DOT && *pattern != DOT)
626	    if (!(pglob->gl_flags & GLOB_DOT) || !dp->d_name[1] ||
627		(dp->d_name[1] == DOT && !dp->d_name[2]))
628		continue; /*unless globdot and not . or .. */
629	pathbuf->len = orig_len;
630	strbuf_append(pathbuf, dp->d_name);
631	strbuf_terminate(pathbuf);
632
633	if (globstar) {
634#ifdef S_IFLNK
635	    if (!chase_symlinks &&
636		(Lstat(pathbuf->s, &sbuf) || S_ISLNK(sbuf.st_mode)))
637		    continue;
638#endif
639	    if (match(pathbuf->s + orig_len, pattern, termstar,
640		(int)m_not) == no_match)
641		    continue;
642	    strbuf_append1(pathbuf, SEP);
643	    strbuf_terminate(pathbuf);
644	    if ((err = glob2(pathbuf, pglobstar, pglob, no_match)) != 0)
645		break;
646	} else {
647	    if (match(pathbuf->s + orig_len, pattern, restpattern,
648		(int) m_not) == no_match)
649		continue;
650	    if ((err = glob2(pathbuf, restpattern, pglob, no_match)) != 0)
651		break;
652	}
653    }
654    /* todo: check error from readdir? */
655    closedir(dirp);
656    return (err);
657}
658
659
660/*
661 * Extend the gl_pathv member of a glob_t structure to accomodate a new item,
662 * add the new item, and update gl_pathc.
663 *
664 * This assumes the BSD realloc, which only copies the block when its size
665 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
666 * behavior.
667 *
668 * Return 0 if new item added, error code if memory couldn't be allocated.
669 *
670 * Invariant of the glob_t structure:
671 *	Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
672 *	 gl_pathv points to (gl_offs + gl_pathc + 1) items.
673 */
674static void
675globextend(const char *path, glob_t *pglob)
676{
677    char **pathv;
678    int i;
679    size_t newsize;
680
681    newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
682    pathv = xrealloc(pglob->gl_pathv, newsize);
683
684    if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
685	/* first time around -- clear initial gl_offs items */
686	pathv += pglob->gl_offs;
687	for (i = pglob->gl_offs; --i >= 0;)
688	    *--pathv = NULL;
689    }
690    pglob->gl_pathv = pathv;
691
692    pathv[pglob->gl_offs + pglob->gl_pathc++] = strsave(path);
693    pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
694}
695
696/*
697 * pattern matching function for filenames.
698 */
699static  int
700match(const char *name, const Char *pat, const Char *patend, int m_not)
701{
702    int ok, negate_range;
703    const Char *patNext;
704    const char *nameNext, *nameStart, *nameEnd;
705    Char c;
706
707    patNext = pat;
708    nameStart = nameNext = name;
709    nameEnd = NULL;
710
711    while (pat < patend || *name) {
712	size_t lwk, pwk;
713	__Char wc, wk, wc1;
714
715	c = *pat; /* Only for M_MASK bits */
716	if (*name == EOS)
717		nameEnd = name;
718
719	pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
720	lwk = one_mbtowc(&wk, name, MB_LEN_MAX);
721	switch (c & M_MASK) {
722	case M_ALL:
723	    while ((*(pat + pwk) & M_MASK) == M_ALL) {
724		pat += pwk;
725		pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
726	    }
727	    patNext = pat;
728	    nameNext = name + lwk;
729	    pat += pwk;
730	    continue;
731	case M_ONE:
732	    if (*name == EOS)
733		break;
734	    name += lwk;
735	    pat += pwk;
736	    continue;
737	case M_SET:
738	    ok = 0;
739	    if (*name == EOS)
740		break;
741	    pat += pwk;
742	    pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
743	    name += lwk;
744	    if ((negate_range = ((*pat & M_MASK) == m_not)) != 0) {
745		pat += pwk;
746		pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
747	    }
748	    wc1 = wc;
749	    while ((*pat & M_MASK) != M_END) {
750		if ((*pat & M_MASK) == M_RNG) {
751		    __Char wc2;
752
753		    pat += pwk;
754		    pwk = One_Char_mbtowc(&wc2, pat, MB_LEN_MAX);
755		    if (globcharcoll(wc1, wk, 0) <= 0 &&
756			globcharcoll(wk, wc2, 0) <= 0)
757			ok = 1;
758		} else if (wc == wk)
759		    ok = 1;
760		pat += pwk;
761		wc1 = wc;
762		pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
763	    }
764	    pat += pwk;
765	    pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
766	    if (ok == negate_range)
767		break;
768	    continue;
769	default:
770	    if (*name == EOS || samecase(wk) != samecase(wc))
771		break;
772	    name += lwk;
773	    pat += pwk;
774	    continue;
775	}
776	if (nameNext != nameStart
777	    && (nameEnd == NULL || nameNext <= nameEnd)) {
778	    pat = patNext;
779	    name = nameNext;
780	    continue;
781	}
782	return 0;
783    }
784    return 1;
785}
786
787/* free allocated data belonging to a glob_t structure */
788void
789globfree(glob_t *pglob)
790{
791    int i;
792    char **pp;
793
794    if (pglob->gl_pathv != NULL) {
795	pp = pglob->gl_pathv + pglob->gl_offs;
796	for (i = pglob->gl_pathc; i--; ++pp)
797	    if (*pp)
798		xfree(*pp), *pp = NULL;
799	xfree(pglob->gl_pathv), pglob->gl_pathv = NULL;
800    }
801}
802