91 lines
1.7 KiB
C++
91 lines
1.7 KiB
C++
/* scandir.cc
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Written by Corinna Vinschen <corinna.vinschen@cityweb.de>
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <dirent.h>
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#include <stdlib.h>
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#include "cygerrno.h"
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extern "C" int
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alphasort (const struct dirent **a, const struct dirent **b)
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{
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return strcoll ((*a)->d_name, (*b)->d_name);
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}
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extern "C" int
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scandir (const char *dir,
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struct dirent ***namelist,
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int (*select) (const struct dirent *),
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int (*compar) (const struct dirent **, const struct dirent **))
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{
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DIR *dirp;
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struct dirent *ent, *etmp, **nl = NULL, **ntmp;
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int count = 0;
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int allocated = 0;
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int err = 0;
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if (!(dirp = opendir (dir)))
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return -1;
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if (!compar)
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compar = alphasort;
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while ((ent = readdir (dirp)))
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{
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if (!select || select (ent))
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{
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if (count == allocated)
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{
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if (allocated == 0)
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allocated = 10;
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else
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allocated *= 2;
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ntmp = (struct dirent **) realloc (nl, allocated * sizeof *nl);
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if (!ntmp)
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{
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err = ENOMEM;
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break;
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}
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nl = ntmp;
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}
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if (!(etmp = (struct dirent *) malloc (sizeof *ent)))
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{
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err = ENOMEM;
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break;
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}
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*etmp = *ent;
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nl[count++] = etmp;
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}
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}
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if (err != 0)
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{
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closedir (dirp);
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if (nl)
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{
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while (count > 0)
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free (nl[--count]);
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free (nl);
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}
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/* Ignore errors from closedir() and what not else. */
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set_errno (err);
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return -1;
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}
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closedir (dirp);
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qsort (nl, count, sizeof *nl, (int (*)(const void *, const void *)) compar);
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*namelist = nl;
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return count;
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}
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