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> */
30 typedef enum {false = 0, true = 1} bool;
39 # include <sys/types.h>
51 # include <inttypes.h>
60 #include "unlocked-io.h"
64 # define SIZE_MAX ((size_t) -1)
67 /* Verify a requirement at compile-time (unlike assert, which is runtime). */
68 #define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
70 /* Non-GNU systems lack these options, so we don't need to check them. */
72 # define FNM_CASEFOLD 0
74 #ifndef FNM_LEADING_DIR
75 # define FNM_LEADING_DIR 0
78 verify (EXCLUDE_macros_do_not_collide_with_FNM_macros,
79 (((EXCLUDE_ANCHORED | EXCLUDE_INCLUDE | EXCLUDE_WILDCARDS)
80 & (FNM_PATHNAME | FNM_NOESCAPE | FNM_PERIOD | FNM_LEADING_DIR
84 /* An exclude pattern-options pair. The options are fnmatch options
85 ORed with EXCLUDE_* options. */
93 /* An exclude list, of pattern-options pairs. */
97 struct patopts *exclude;
102 /* Return a newly allocated and empty exclude list. */
107 struct exclude *ex = (struct exclude *) xmalloc (sizeof *ex);
108 ex->exclude_count = 0;
109 ex->exclude_alloc = (1 << 6); /* This must be a power of 2. */
110 ex->exclude = (struct patopts *) xmalloc (ex->exclude_alloc
111 * sizeof ex->exclude[0]);
115 /* Free the storage associated with an exclude list. */
118 free_exclude (struct exclude *ex)
124 /* Return zero if PATTERN matches F, obeying OPTIONS, except that
125 (unlike fnmatch) wildcards are disabled in PATTERN. */
128 fnmatch_no_wildcards (char const *pattern, char const *f, int options)
130 if (! (options & FNM_LEADING_DIR))
131 return ((options & FNM_CASEFOLD)
132 ? strcasecmp (pattern, f)
133 : strcmp (pattern, f));
136 size_t patlen = strlen (pattern);
137 int r = ((options & FNM_CASEFOLD)
138 ? strncasecmp (pattern, f, patlen)
139 : strncmp (pattern, f, patlen));
150 /* Return true if EX excludes F. */
153 excluded_filename (struct exclude const *ex, char const *f)
155 size_t exclude_count = ex->exclude_count;
157 /* If no options are given, the default is to include. */
158 if (exclude_count == 0)
162 struct patopts const *exclude = ex->exclude;
165 /* Otherwise, the default is the opposite of the first option. */
166 bool excluded = !! (exclude[0].options & EXCLUDE_INCLUDE);
168 /* Scan through the options, seeing whether they change F from
169 excluded to included or vice versa. */
170 for (i = 0; i < exclude_count; i++)
172 char const *pattern = exclude[i].pattern;
173 int options = exclude[i].options;
174 if (excluded == !! (options & EXCLUDE_INCLUDE))
176 int (*matcher) (char const *, char const *, int) =
177 (options & EXCLUDE_WILDCARDS
179 : fnmatch_no_wildcards);
180 bool matched = ((*matcher) (pattern, f, options) == 0);
183 if (! (options & EXCLUDE_ANCHORED))
184 for (p = f; *p && ! matched; p++)
185 if (*p == '/' && p[1] != '/')
186 matched = ((*matcher) (pattern, p + 1, options) == 0);
196 /* Append to EX the exclusion PATTERN with OPTIONS. */
199 add_exclude (struct exclude *ex, char const *pattern, int options)
201 struct patopts *patopts;
203 if (ex->exclude_alloc <= ex->exclude_count)
205 size_t s = 2 * ex->exclude_alloc;
206 if (! (0 < s && s <= SIZE_MAX / sizeof ex->exclude[0]))
208 ex->exclude_alloc = s;
209 ex->exclude = (struct patopts *) xrealloc (ex->exclude,
210 s * sizeof ex->exclude[0]);
213 patopts = &ex->exclude[ex->exclude_count++];
214 patopts->pattern = pattern;
215 patopts->options = options;
218 /* Use ADD_FUNC to append to EX the patterns in FILENAME, each with
219 OPTIONS. LINE_END terminates each pattern in the file. Return -1
220 on failure, 0 on success. */
223 add_exclude_file (void (*add_func) (struct exclude *, char const *, int),
224 struct exclude *ex, char const *filename, int options,
227 bool use_stdin = filename[0] == '-' && !filename[1];
233 size_t buf_alloc = (1 << 10); /* This must be a power of two. */
234 size_t buf_count = 0;
240 else if (! (in = fopen (filename, "r")))
243 buf = xmalloc (buf_alloc);
245 while ((c = getc (in)) != EOF)
247 buf[buf_count++] = c;
248 if (buf_count == buf_alloc)
253 buf = xrealloc (buf, buf_alloc);
260 if (!use_stdin && fclose (in) != 0)
263 buf = xrealloc (buf, buf_count + 1);
265 for (pattern = p = buf, lim = buf + buf_count; p <= lim; p++)
266 if (p < lim ? *p == line_end : buf < p && p[-1])
269 (*add_func) (ex, pattern, options);