1 /* exclude.c -- exclude file names
3 Copyright 1992, 1993, 1994, 1997, 1999, 2000, 2001 Free Software
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 verify (EXCLUDE_macros_do_not_collide_with_FNM_macros,
71 (((EXCLUDE_ANCHORED | EXCLUDE_INCLUDE | EXCLUDE_WILDCARDS)
72 & (FNM_FILE_NAME | FNM_NOESCAPE | FNM_PERIOD | FNM_LEADING_DIR
76 /* An exclude pattern-options pair. The options are fnmatch options
77 ORed with EXCLUDE_* options. */
85 /* An exclude list, of pattern-options pairs. */
89 struct patopts *exclude;
94 /* Return a newly allocated and empty exclude list. */
99 struct exclude *ex = (struct exclude *) xmalloc (sizeof *ex);
100 ex->exclude_count = 0;
101 ex->exclude_alloc = (1 << 6); /* This must be a power of 2. */
102 ex->exclude = (struct patopts *) xmalloc (ex->exclude_alloc
103 * sizeof ex->exclude[0]);
107 /* Free the storage associated with an exclude list. */
110 free_exclude (struct exclude *ex)
116 /* Return zero if PATTERN matches F, obeying OPTIONS, except that
117 (unlike fnmatch) wildcards are disabled in PATTERN. */
120 fnmatch_no_wildcards (char const *pattern, char const *f, int options)
122 if (! (options & FNM_LEADING_DIR))
123 return ((options & FNM_CASEFOLD)
124 ? strcasecmp (pattern, f)
125 : strcmp (pattern, f));
128 size_t patlen = strlen (pattern);
129 int r = ((options & FNM_CASEFOLD)
130 ? strncasecmp (pattern, f, patlen)
131 : strncmp (pattern, f, patlen));
142 /* Return true if EX excludes F. */
145 excluded_filename (struct exclude const *ex, char const *f)
147 size_t exclude_count = ex->exclude_count;
149 /* If no options are given, the default is to include. */
150 if (exclude_count == 0)
154 struct patopts const *exclude = ex->exclude;
157 /* Otherwise, the default is the opposite of the first option. */
158 bool excluded = !! (exclude[0].options & EXCLUDE_INCLUDE);
160 /* Scan through the options, seeing whether they change F from
161 excluded to included or vice versa. */
162 for (i = 0; i < exclude_count; i++)
164 char const *pattern = exclude[i].pattern;
165 int options = exclude[i].options;
166 if (excluded == !! (options & EXCLUDE_INCLUDE))
168 int (*matcher) PARAMS ((char const *, char const *, int)) =
169 (options & EXCLUDE_WILDCARDS
171 : fnmatch_no_wildcards);
172 bool matched = ((*matcher) (pattern, f, options) == 0);
175 if (! (options & EXCLUDE_ANCHORED))
176 for (p = f; *p && ! matched; p++)
177 if (*p == '/' && p[1] != '/')
178 matched = ((*matcher) (pattern, p + 1, options) == 0);
188 /* Append to EX the exclusion PATTERN with OPTIONS. */
191 add_exclude (struct exclude *ex, char const *pattern, int options)
193 struct patopts *patopts;
195 if (ex->exclude_alloc <= ex->exclude_count)
197 size_t s = 2 * ex->exclude_alloc;
198 if (! (0 < s && s <= SIZE_MAX / sizeof ex->exclude[0]))
200 ex->exclude_alloc = s;
201 ex->exclude = (struct patopts *) xrealloc (ex->exclude,
202 s * sizeof ex->exclude[0]);
205 patopts = &ex->exclude[ex->exclude_count++];
206 patopts->pattern = pattern;
207 patopts->options = options;
210 /* Use ADD_FUNC to append to EX the patterns in FILENAME, each with
211 OPTIONS. LINE_END terminates each pattern in the file. Return -1
212 on failure, 0 on success. */
215 add_exclude_file (void (*add_func) PARAMS ((struct exclude *,
217 struct exclude *ex, char const *filename, int options,
220 bool use_stdin = filename[0] == '-' && !filename[1];
226 size_t buf_alloc = (1 << 10); /* This must be a power of two. */
227 size_t buf_count = 0;
233 else if (! (in = fopen (filename, "r")))
236 buf = xmalloc (buf_alloc);
238 while ((c = getc (in)) != EOF)
240 buf[buf_count++] = c;
241 if (buf_count == buf_alloc)
246 buf = xrealloc (buf, buf_alloc);
253 if (!use_stdin && fclose (in) != 0)
256 buf = xrealloc (buf, buf_count + 1);
258 for (pattern = p = buf, lim = buf + buf_count; p <= lim; p++)
259 if (p < lim ? *p == line_end : buf < p && p[-1])
262 (*add_func) (ex, pattern, options);