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> */
39 # include <inttypes.h>
48 #include "unlocked-io.h"
52 # define SIZE_MAX ((size_t) -1)
55 #if STDC_HEADERS || (! defined isascii && ! HAVE_ISASCII)
56 # define IN_CTYPE_DOMAIN(c) true
58 # define IN_CTYPE_DOMAIN(c) isascii (c)
62 is_space (unsigned char c)
64 return IN_CTYPE_DOMAIN (c) && isspace (c);
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 = xmalloc (sizeof *ex);
108 ex->exclude_count = 0;
109 ex->exclude_alloc = (1 << 6); /* This must be a power of 2. */
110 ex->exclude = xmalloc (ex->exclude_alloc * sizeof ex->exclude[0]);
114 /* Free the storage associated with an exclude list. */
117 free_exclude (struct exclude *ex)
123 /* Return zero if PATTERN matches F, obeying OPTIONS, except that
124 (unlike fnmatch) wildcards are disabled in PATTERN. */
127 fnmatch_no_wildcards (char const *pattern, char const *f, int options)
129 if (! (options & FNM_LEADING_DIR))
130 return ((options & FNM_CASEFOLD)
131 ? strcasecmp (pattern, f)
132 : strcmp (pattern, f));
135 size_t patlen = strlen (pattern);
136 int r = ((options & FNM_CASEFOLD)
137 ? strncasecmp (pattern, f, patlen)
138 : strncmp (pattern, f, patlen));
149 /* Return true if EX excludes F. */
152 excluded_filename (struct exclude const *ex, char const *f)
154 size_t exclude_count = ex->exclude_count;
156 /* If no options are given, the default is to include. */
157 if (exclude_count == 0)
161 struct patopts const *exclude = ex->exclude;
164 /* Otherwise, the default is the opposite of the first option. */
165 bool excluded = !! (exclude[0].options & EXCLUDE_INCLUDE);
167 /* Scan through the options, seeing whether they change F from
168 excluded to included or vice versa. */
169 for (i = 0; i < exclude_count; i++)
171 char const *pattern = exclude[i].pattern;
172 int options = exclude[i].options;
173 if (excluded == !! (options & EXCLUDE_INCLUDE))
175 int (*matcher) (char const *, char const *, int) =
176 (options & EXCLUDE_WILDCARDS
178 : fnmatch_no_wildcards);
179 bool matched = ((*matcher) (pattern, f, options) == 0);
182 if (! (options & EXCLUDE_ANCHORED))
183 for (p = f; *p && ! matched; p++)
184 if (*p == '/' && p[1] != '/')
185 matched = ((*matcher) (pattern, p + 1, options) == 0);
195 /* Append to EX the exclusion PATTERN with OPTIONS. */
198 add_exclude (struct exclude *ex, char const *pattern, int options)
200 struct patopts *patopts;
202 if (ex->exclude_alloc <= ex->exclude_count)
204 size_t s = 2 * ex->exclude_alloc;
205 if (! (0 < s && s <= SIZE_MAX / sizeof ex->exclude[0]))
207 ex->exclude_alloc = s;
208 ex->exclude = xrealloc (ex->exclude, s * sizeof ex->exclude[0]);
211 patopts = &ex->exclude[ex->exclude_count++];
212 patopts->pattern = pattern;
213 patopts->options = options;
216 /* Use ADD_FUNC to append to EX the patterns in FILENAME, each with
217 OPTIONS. LINE_END terminates each pattern in the file. If
218 LINE_END is a space character, ignore trailing spaces and empty
219 lines in FILE. Return -1 on failure, 0 on success. */
222 add_exclude_file (void (*add_func) (struct exclude *, char const *, int),
223 struct exclude *ex, char const *filename, int options,
226 bool use_stdin = filename[0] == '-' && !filename[1];
232 size_t buf_alloc = (1 << 10); /* This must be a power of two. */
233 size_t buf_count = 0;
239 else if (! (in = fopen (filename, "r")))
242 buf = xmalloc (buf_alloc);
244 while ((c = getc (in)) != EOF)
246 buf[buf_count++] = c;
247 if (buf_count == buf_alloc)
252 buf = xrealloc (buf, buf_alloc);
259 if (!use_stdin && fclose (in) != 0)
262 buf = xrealloc (buf, buf_count + 1);
263 buf[buf_count] = line_end;
264 lim = buf + buf_count + ! (buf_count == 0 || buf[buf_count - 1] == line_end);
267 for (p = buf; p < lim; p++)
270 char *pattern_end = p;
272 if (is_space (line_end))
274 for (; ; pattern_end--)
275 if (pattern_end == pattern)
277 else if (! is_space (pattern_end[-1]))
282 (*add_func) (ex, pattern, options);