fnmatch.c revision 77299 
1/* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
2
3NOTE: This source is derived from an old version taken from the GNU C
4Library (glibc).
5
6This program is free software; you can redistribute it and/or modify it
7under the terms of the GNU General Public License as published by the
8Free Software Foundation; either version 2, or (at your option) any
9later version.
10
11This program is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with this program; if not, write to the Free Software
18Foundation, 59 Temple Place - Suite 330,
19Boston, MA 02111-1307, USA.  */
20
21#ifdef HAVE_CONFIG_H
22#if defined (CONFIG_BROKETS)
23/* We use <config.h> instead of "config.h" so that a compilation
24   using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
25   (which it would do because it found this file in $srcdir).  */
26#include <config.h>
27#else
28#include "config.h"
29#endif
30#endif
31
32
33#ifndef _GNU_SOURCE
34#define _GNU_SOURCE
35#endif
36
37/* This code to undef const added in libiberty.  */
38#ifndef __STDC__
39/* This is a separate conditional since some stdc systems
40   reject `defined (const)'.  */
41#ifndef const
42#define const
43#endif
44#endif
45
46#include <errno.h>
47#include <fnmatch.h>
48#include <safe-ctype.h>
49
50/* Comment out all this code if we are using the GNU C Library, and are not
51   actually compiling the library itself.  This code is part of the GNU C
52   Library, but also included in many other GNU distributions.  Compiling
53   and linking in this code is a waste when using the GNU C library
54   (especially if it is a shared library).  Rather than having every GNU
55   program understand `configure --with-gnu-libc' and omit the object files,
56   it is simpler to just do this in the source for each such file.  */
57
58#if defined (_LIBC) || !defined (__GNU_LIBRARY__)
59
60
61#if !defined(__GNU_LIBRARY__) && !defined(STDC_HEADERS)
62extern int errno;
63#endif
64
65/* Match STRING against the filename pattern PATTERN, returning zero if
66   it matches, nonzero if not.  */
67int
68fnmatch (pattern, string, flags)
69     const char *pattern;
70     const char *string;
71     int flags;
72{
73  register const char *p = pattern, *n = string;
74  register unsigned char c;
75
76#define FOLD(c)	((flags & FNM_CASEFOLD) ? TOLOWER (c) : (c))
77
78  while ((c = *p++) != '\0')
79    {
80      c = FOLD (c);
81
82      switch (c)
83	{
84	case '?':
85	  if (*n == '\0')
86	    return FNM_NOMATCH;
87	  else if ((flags & FNM_FILE_NAME) && *n == '/')
88	    return FNM_NOMATCH;
89	  else if ((flags & FNM_PERIOD) && *n == '.' &&
90		   (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
91	    return FNM_NOMATCH;
92	  break;
93
94	case '\\':
95	  if (!(flags & FNM_NOESCAPE))
96	    {
97	      c = *p++;
98	      c = FOLD (c);
99	    }
100	  if (FOLD ((unsigned char)*n) != c)
101	    return FNM_NOMATCH;
102	  break;
103
104	case '*':
105	  if ((flags & FNM_PERIOD) && *n == '.' &&
106	      (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
107	    return FNM_NOMATCH;
108
109	  for (c = *p++; c == '?' || c == '*'; c = *p++, ++n)
110	    if (((flags & FNM_FILE_NAME) && *n == '/') ||
111		(c == '?' && *n == '\0'))
112	      return FNM_NOMATCH;
113
114	  if (c == '\0')
115	    return 0;
116
117	  {
118	    unsigned char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c;
119	    c1 = FOLD (c1);
120	    for (--p; *n != '\0'; ++n)
121	      if ((c == '[' || FOLD ((unsigned char)*n) == c1) &&
122		  fnmatch (p, n, flags & ~FNM_PERIOD) == 0)
123		return 0;
124	    return FNM_NOMATCH;
125	  }
126
127	case '[':
128	  {
129	    /* Nonzero if the sense of the character class is inverted.  */
130	    register int not;
131
132	    if (*n == '\0')
133	      return FNM_NOMATCH;
134
135	    if ((flags & FNM_PERIOD) && *n == '.' &&
136		(n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
137	      return FNM_NOMATCH;
138
139	    not = (*p == '!' || *p == '^');
140	    if (not)
141	      ++p;
142
143	    c = *p++;
144	    for (;;)
145	      {
146		register unsigned char cstart = c, cend = c;
147
148		if (!(flags & FNM_NOESCAPE) && c == '\\')
149		  cstart = cend = *p++;
150
151		cstart = cend = FOLD (cstart);
152
153		if (c == '\0')
154		  /* [ (unterminated) loses.  */
155		  return FNM_NOMATCH;
156
157		c = *p++;
158		c = FOLD (c);
159
160		if ((flags & FNM_FILE_NAME) && c == '/')
161		  /* [/] can never match.  */
162		  return FNM_NOMATCH;
163
164		if (c == '-' && *p != ']')
165		  {
166		    cend = *p++;
167		    if (!(flags & FNM_NOESCAPE) && cend == '\\')
168		      cend = *p++;
169		    if (cend == '\0')
170		      return FNM_NOMATCH;
171		    cend = FOLD (cend);
172
173		    c = *p++;
174		  }
175
176		if (FOLD ((unsigned char)*n) >= cstart
177		    && FOLD ((unsigned char)*n) <= cend)
178		  goto matched;
179
180		if (c == ']')
181		  break;
182	      }
183	    if (!not)
184	      return FNM_NOMATCH;
185	    break;
186
187	  matched:;
188	    /* Skip the rest of the [...] that already matched.  */
189	    while (c != ']')
190	      {
191		if (c == '\0')
192		  /* [... (unterminated) loses.  */
193		  return FNM_NOMATCH;
194
195		c = *p++;
196		if (!(flags & FNM_NOESCAPE) && c == '\\')
197		  /* XXX 1003.2d11 is unclear if this is right.  */
198		  ++p;
199	      }
200	    if (not)
201	      return FNM_NOMATCH;
202	  }
203	  break;
204
205	default:
206	  if (c != FOLD ((unsigned char)*n))
207	    return FNM_NOMATCH;
208	}
209
210      ++n;
211    }
212
213  if (*n == '\0')
214    return 0;
215
216  if ((flags & FNM_LEADING_DIR) && *n == '/')
217    /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz".  */
218    return 0;
219
220  return FNM_NOMATCH;
221}
222
223#endif	/* _LIBC or not __GNU_LIBRARY__.  */
224