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/* exclude.c -- exclude file names
Copyright 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Written by Paul Eggert <eggert@twinsun.com> */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <errno.h>
#ifndef errno
extern int errno;
#endif
#include <exclude.h>
#include <fnmatch.h>
#include <stdio.h>
#include <sys/types.h>
void *xmalloc PARAMS ((size_t));
void *xrealloc PARAMS ((void *, size_t));
/* Keep track of excluded file name patterns. */
struct exclude
{
char const **exclude;
int exclude_alloc;
int exclude_count;
};
struct exclude *
new_exclude (void)
{
struct exclude *ex = (struct exclude *) xmalloc (sizeof (struct exclude));
ex->exclude_count = 0;
ex->exclude_alloc = 64;
ex->exclude = (char const **) xmalloc (ex->exclude_alloc * sizeof (char *));
return ex;
}
int
excluded_filename (struct exclude const *ex, char const *f)
{
char const * const *exclude = ex->exclude;
int exclude_count = ex->exclude_count;
int i;
for (i = 0; i < exclude_count; i++)
if (fnmatch (exclude[i], f, 0) == 0)
return 1;
return 0;
}
void
add_exclude (struct exclude *ex, char const *pattern)
{
if (ex->exclude_alloc <= ex->exclude_count)
ex->exclude = (char const **) xrealloc (ex->exclude,
((ex->exclude_alloc *= 2)
* sizeof (char *)));
ex->exclude[ex->exclude_count++] = pattern;
}
int
add_exclude_file (struct exclude *ex, char const *filename, char line_end)
{
int use_stdin = filename[0] == '-' && !filename[1];
FILE *in;
char *buf;
char *p;
char const *pattern;
char const *lim;
size_t buf_alloc = 1024;
size_t buf_count = 0;
int c;
int e = 0;
if (use_stdin)
in = stdin;
else if (! (in = fopen (filename, "r")))
return -1;
buf = xmalloc (buf_alloc);
while ((c = getc (in)) != EOF)
{
buf[buf_count++] = c;
if (buf_count == buf_alloc)
buf = xrealloc (buf, buf_alloc *= 2);
}
buf = xrealloc (buf, buf_count + 1);
if (ferror (in))
e = errno;
if (!use_stdin && fclose (in) != 0)
e = errno;
for (pattern = p = buf, lim = buf + buf_count; p <= lim; p++)
if (p < lim ? *p == line_end : buf < p && p[-1])
{
*p = '\0';
add_exclude (ex, pattern);
pattern = p + 1;
}
errno = e;
return e ? -1 : 0;
}
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