1 /* exclude.c -- exclude file names
3 Copyright (C) 1992, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003 Free
4 Software Foundation, Inc.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; see the file COPYING.
18 If not, write to the Free Software Foundation,
19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* Written by Paul Eggert <eggert@twinsun.com> */
35 # include <sys/types.h>
47 # include <inttypes.h>
56 #include "unlocked-io.h"
60 # define SIZE_MAX ((size_t) -1)
63 /* Verify a requirement at compile-time (unlike assert, which is runtime). */
64 #define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
66 /* Non-GNU systems lack these options, so we don't need to check them. */
68 # define FNM_CASEFOLD 0
70 #ifndef FNM_LEADING_DIR
71 # define FNM_LEADING_DIR 0
74 verify (EXCLUDE_macros_do_not_collide_with_FNM_macros,
75 (((EXCLUDE_ANCHORED | EXCLUDE_INCLUDE | EXCLUDE_WILDCARDS)
76 & (FNM_PATHNAME | FNM_NOESCAPE | FNM_PERIOD | FNM_LEADING_DIR
80 /* An exclude pattern-options pair. The options are fnmatch options
81 ORed with EXCLUDE_* options. */
89 /* An exclude list, of pattern-options pairs. */
93 struct patopts *exclude;
98 /* Return a newly allocated and empty exclude list. */
103 struct exclude *ex = (struct exclude *) xmalloc (sizeof *ex);
104 ex->exclude_count = 0;
105 ex->exclude_alloc = (1 << 6); /* This must be a power of 2. */
106 ex->exclude = (struct patopts *) xmalloc (ex->exclude_alloc
107 * sizeof ex->exclude[0]);
111 /* Free the storage associated with an exclude list. */
114 free_exclude (struct exclude *ex)
120 /* Return zero if PATTERN matches F, obeying OPTIONS, except that
121 (unlike fnmatch) wildcards are disabled in PATTERN. */
124 fnmatch_no_wildcards (char const *pattern, char const *f, int options)
126 if (! (options & FNM_LEADING_DIR))
127 return ((options & FNM_CASEFOLD)
128 ? strcasecmp (pattern, f)
129 : strcmp (pattern, f));
132 size_t patlen = strlen (pattern);
133 int r = ((options & FNM_CASEFOLD)
134 ? strncasecmp (pattern, f, patlen)
135 : strncmp (pattern, f, patlen));
146 /* Return true if EX excludes F. */
149 excluded_filename (struct exclude const *ex, char const *f)
151 size_t exclude_count = ex->exclude_count;
153 /* If no options are given, the default is to include. */
154 if (exclude_count == 0)
158 struct patopts const *exclude = ex->exclude;
161 /* Otherwise, the default is the opposite of the first option. */
162 bool excluded = !! (exclude[0].options & EXCLUDE_INCLUDE);
164 /* Scan through the options, seeing whether they change F from
165 excluded to included or vice versa. */
166 for (i = 0; i < exclude_count; i++)
168 char const *pattern = exclude[i].pattern;
169 int options = exclude[i].options;
170 if (excluded == !! (options & EXCLUDE_INCLUDE))
172 int (*matcher) (char const *, char const *, int) =
173 (options & EXCLUDE_WILDCARDS
175 : fnmatch_no_wildcards);
176 bool matched = ((*matcher) (pattern, f, options) == 0);
179 if (! (options & EXCLUDE_ANCHORED))
180 for (p = f; *p && ! matched; p++)
181 if (*p == '/' && p[1] != '/')
182 matched = ((*matcher) (pattern, p + 1, options) == 0);
192 /* Append to EX the exclusion PATTERN with OPTIONS. */
195 add_exclude (struct exclude *ex, char const *pattern, int options)
197 struct patopts *patopts;
199 if (ex->exclude_alloc <= ex->exclude_count)
201 size_t s = 2 * ex->exclude_alloc;
202 if (! (0 < s && s <= SIZE_MAX / sizeof ex->exclude[0]))
204 ex->exclude_alloc = s;
205 ex->exclude = (struct patopts *) xrealloc (ex->exclude,
206 s * sizeof ex->exclude[0]);
209 patopts = &ex->exclude[ex->exclude_count++];
210 patopts->pattern = pattern;
211 patopts->options = options;
214 /* Use ADD_FUNC to append to EX the patterns in FILENAME, each with
215 OPTIONS. LINE_END terminates each pattern in the file. Return -1
216 on failure, 0 on success. */
219 add_exclude_file (void (*add_func) (struct exclude *, char const *, int),
220 struct exclude *ex, char const *filename, int options,
223 bool use_stdin = filename[0] == '-' && !filename[1];
229 size_t buf_alloc = (1 << 10); /* This must be a power of two. */
230 size_t buf_count = 0;
236 else if (! (in = fopen (filename, "r")))
239 buf = xmalloc (buf_alloc);
241 while ((c = getc (in)) != EOF)
243 buf[buf_count++] = c;
244 if (buf_count == buf_alloc)
249 buf = xrealloc (buf, buf_alloc);
256 if (!use_stdin && fclose (in) != 0)
259 buf = xrealloc (buf, buf_count + 1);
261 for (pattern = p = buf, lim = buf + buf_count; p <= lim; p++)
262 if (p < lim ? *p == line_end : buf < p && p[-1])
265 (*add_func) (ex, pattern, options);