1 /* exclude.c -- exclude file names
2 Copyright 1992, 1993, 1994, 1997, 1999, 2000 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; see the file COPYING.
16 If not, write to the Free Software Foundation,
17 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18
19 /* Written by Paul Eggert <[email protected]> */
20
21 #if HAVE_CONFIG_H
22 # include <config.h>
23 #endif
24
25 #include <errno.h>
26 #ifndef errno
27 extern int errno;
28 #endif
29 #include <exclude.h>
30 #include <fnmatch.h>
31 #include <stdio.h>
32 #include <sys/types.h>
33
34 void *xmalloc PARAMS ((size_t));
35 void *xrealloc PARAMS ((void *, size_t));
36
37 /* Keep track of excluded file name patterns. */
38
39 struct exclude
40 {
41 char const **exclude;
42 int exclude_alloc;
43 int exclude_count;
44 };
45
46 struct exclude *
new_exclude(void)47 new_exclude (void)
48 {
49 struct exclude *ex = (struct exclude *) xmalloc (sizeof (struct exclude));
50 ex->exclude_count = 0;
51 ex->exclude_alloc = 64;
52 ex->exclude = (char const **) xmalloc (ex->exclude_alloc * sizeof (char *));
53 return ex;
54 }
55
56 int
excluded_filename(struct exclude const * ex,char const * f,int options)57 excluded_filename (struct exclude const *ex, char const *f, int options)
58 {
59 char const * const *exclude = ex->exclude;
60 int exclude_count = ex->exclude_count;
61 int i;
62
63 for (i = 0; i < exclude_count; i++)
64 if (fnmatch (exclude[i], f, options) == 0)
65 return 1;
66
67 return 0;
68 }
69
70 void
add_exclude(struct exclude * ex,char const * pattern)71 add_exclude (struct exclude *ex, char const *pattern)
72 {
73 if (ex->exclude_alloc <= ex->exclude_count)
74 ex->exclude = (char const **) xrealloc (ex->exclude,
75 ((ex->exclude_alloc *= 2)
76 * sizeof (char *)));
77
78 ex->exclude[ex->exclude_count++] = pattern;
79 }
80
81 int
add_exclude_file(void (* add_func)PARAMS ((struct exclude *,char const *)),struct exclude * ex,char const * filename,char line_end)82 add_exclude_file (void (*add_func) PARAMS ((struct exclude *, char const *)),
83 struct exclude *ex, char const *filename, char line_end)
84 {
85 int use_stdin = filename[0] == '-' && !filename[1];
86 FILE *in;
87 char *buf;
88 char *p;
89 char const *pattern;
90 char const *lim;
91 size_t buf_alloc = 1024;
92 size_t buf_count = 0;
93 int c;
94 int e = 0;
95
96 if (use_stdin)
97 in = stdin;
98 else if (! (in = fopen (filename, "r")))
99 return -1;
100
101 buf = xmalloc (buf_alloc);
102
103 while ((c = getc (in)) != EOF)
104 {
105 buf[buf_count++] = c;
106 if (buf_count == buf_alloc)
107 buf = xrealloc (buf, buf_alloc *= 2);
108 }
109
110 buf = xrealloc (buf, buf_count + 1);
111
112 if (ferror (in))
113 e = errno;
114
115 if (!use_stdin && fclose (in) != 0)
116 e = errno;
117
118 for (pattern = p = buf, lim = buf + buf_count; p <= lim; p++)
119 if (p < lim ? *p == line_end : buf < p && p[-1])
120 {
121 *p = '\0';
122 (*add_func) (ex, pattern);
123 pattern = p + 1;
124 }
125
126 errno = e;
127 return e ? -1 : 0;
128 }
129