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/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2000-2011 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include "dirstream.h"
#ifndef __SCANDIR
# define __SCANDIR scandir
# define __DIRENT_TYPE struct dirent
# define __READDIR readdir
#endif
int __SCANDIR(const char *dir, __DIRENT_TYPE ***namelist,
int (*selector) (const __DIRENT_TYPE *),
int (*compar) (const __DIRENT_TYPE **, const __DIRENT_TYPE **))
{
DIR *dp = opendir (dir);
__DIRENT_TYPE *current;
__DIRENT_TYPE **names = NULL;
size_t names_size = 0, pos;
int save;
if (dp == NULL)
return -1;
save = errno;
__set_errno (0);
pos = 0;
while ((current = __READDIR (dp)) != NULL) {
int use_it = selector == NULL;
if (! use_it)
{
use_it = (*selector) (current);
/* The selector function might have changed errno.
* It was zero before and it need to be again to make
* the latter tests work. */
if (! use_it)
__set_errno (0);
}
if (use_it)
{
__DIRENT_TYPE *vnew;
size_t dsize;
/* Ignore errors from selector or readdir */
__set_errno (0);
if (unlikely(pos == names_size))
{
__DIRENT_TYPE **new;
if (names_size == 0)
names_size = 10;
else
names_size *= 2;
new = (__DIRENT_TYPE **) realloc (names,
names_size * sizeof (__DIRENT_TYPE *));
if (new == NULL)
break;
names = new;
}
dsize = ¤t->d_name[_D_ALLOC_NAMLEN(current)] - (char*)current;
vnew = (__DIRENT_TYPE *) malloc (dsize);
if (vnew == NULL)
break;
names[pos++] = (__DIRENT_TYPE *) memcpy (vnew, current, dsize);
}
}
if (unlikely(errno != 0))
{
save = errno;
closedir (dp);
while (pos > 0)
free (names[--pos]);
free (names);
__set_errno (save);
return -1;
}
closedir (dp);
__set_errno (save);
/* Sort the list if we have a comparison function to sort with. */
if (compar != NULL)
qsort (names, pos, sizeof (__DIRENT_TYPE *), (comparison_fn_t) compar);
*namelist = names;
return pos;
}
#if __WORDSIZE == 64
strong_alias_untyped(scandir,scandir64)
#endif
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