1 /* exclude.c -- exclude file names
3 Copyright (C) 1992, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006 Free 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 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
21 /* Written by Paul Eggert <eggert@twinsun.com> */
41 # include "unlocked-io.h"
44 /* Non-GNU systems lack these options, so we don't need to check them. */
46 # define FNM_CASEFOLD 0
48 #ifndef FNM_LEADING_DIR
49 # define FNM_LEADING_DIR 0
52 verify (((EXCLUDE_ANCHORED | EXCLUDE_INCLUDE | EXCLUDE_WILDCARDS)
53 & (FNM_PATHNAME | FNM_NOESCAPE | FNM_PERIOD | FNM_LEADING_DIR
57 /* An exclude pattern-options pair. The options are fnmatch options
58 ORed with EXCLUDE_* options. */
66 /* An exclude list, of pattern-options pairs. */
70 struct patopts *exclude;
75 /* Return a newly allocated and empty exclude list. */
80 return xzalloc (sizeof *new_exclude ());
83 /* Free the storage associated with an exclude list. */
86 free_exclude (struct exclude *ex)
92 /* Return zero if PATTERN matches F, obeying OPTIONS, except that
93 (unlike fnmatch) wildcards are disabled in PATTERN. */
96 fnmatch_no_wildcards (char const *pattern, char const *f, int options)
98 if (! (options & FNM_LEADING_DIR))
99 return ((options & FNM_CASEFOLD)
100 ? strcasecmp (pattern, f)
101 : strcmp (pattern, f));
104 size_t patlen = strlen (pattern);
105 int r = ((options & FNM_CASEFOLD)
106 ? strncasecmp (pattern, f, patlen)
107 : strncmp (pattern, f, patlen));
119 exclude_fnmatch (char const *pattern, char const *f, int options)
121 int (*matcher) (char const *, char const *, int) =
122 (options & EXCLUDE_WILDCARDS
124 : fnmatch_no_wildcards);
125 bool matched = ((*matcher) (pattern, f, options) == 0);
128 if (! (options & EXCLUDE_ANCHORED))
129 for (p = f; *p && ! matched; p++)
130 if (*p == '/' && p[1] != '/')
131 matched = ((*matcher) (pattern, p + 1, options) == 0);
136 /* Return true if EX excludes F. */
139 excluded_file_name (struct exclude const *ex, char const *f)
141 size_t exclude_count = ex->exclude_count;
143 /* If no options are given, the default is to include. */
144 if (exclude_count == 0)
148 struct patopts const *exclude = ex->exclude;
151 /* Otherwise, the default is the opposite of the first option. */
152 bool excluded = !! (exclude[0].options & EXCLUDE_INCLUDE);
154 /* Scan through the options, seeing whether they change F from
155 excluded to included or vice versa. */
156 for (i = 0; i < exclude_count; i++)
158 char const *pattern = exclude[i].pattern;
159 int options = exclude[i].options;
160 if (excluded == !! (options & EXCLUDE_INCLUDE))
161 excluded ^= exclude_fnmatch (pattern, f, options);
168 /* Append to EX the exclusion PATTERN with OPTIONS. */
171 add_exclude (struct exclude *ex, char const *pattern, int options)
173 struct patopts *patopts;
175 if (ex->exclude_count == ex->exclude_alloc)
176 ex->exclude = x2nrealloc (ex->exclude, &ex->exclude_alloc,
177 sizeof *ex->exclude);
179 patopts = &ex->exclude[ex->exclude_count++];
180 patopts->pattern = pattern;
181 patopts->options = options;
184 /* Use ADD_FUNC to append to EX the patterns in FILE_NAME, each with
185 OPTIONS. LINE_END terminates each pattern in the file. If
186 LINE_END is a space character, ignore trailing spaces and empty
187 lines in FILE. Return -1 on failure, 0 on success. */
190 add_exclude_file (void (*add_func) (struct exclude *, char const *, int),
191 struct exclude *ex, char const *file_name, int options,
194 bool use_stdin = file_name[0] == '-' && !file_name[1];
200 size_t buf_alloc = 0;
201 size_t buf_count = 0;
207 else if (! (in = fopen (file_name, "r")))
210 while ((c = getc (in)) != EOF)
212 if (buf_count == buf_alloc)
213 buf = x2realloc (buf, &buf_alloc);
214 buf[buf_count++] = c;
220 if (!use_stdin && fclose (in) != 0)
223 buf = xrealloc (buf, buf_count + 1);
224 buf[buf_count] = line_end;
225 lim = buf + buf_count + ! (buf_count == 0 || buf[buf_count - 1] == line_end);
228 for (p = buf; p < lim; p++)
231 char *pattern_end = p;
233 if (isspace ((unsigned char) line_end))
235 for (; ; pattern_end--)
236 if (pattern_end == pattern)
238 else if (! isspace ((unsigned char) pattern_end[-1]))
243 (*add_func) (ex, pattern, options);