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/* ****************************************************************************
* dirent/open.c -- Open a directory stream.
* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
*
* This file is part of the 'casiowin/core' module in libcarrot, an
* experimental modular libc project.
*
* This file is governed by the CeCILL-C license under French law and abiding
* by the rules of distribution of free software. You can use, modify and or
* redistribute it under the terms of the CeCILL-C license as circulated by
* CEA, CNRS and INRIA at the following URL: http://www.cecill.info
*
* As a counterpart to the access to the source code and rights to copy, modify
* and redistribute granted by the license, users are provided only with a
* limited warranty and the software's author, the holder of the economic
* rights, and the successive licensors have only limited liability.
*
* In this respect, the user's attention is drawn to the risks associated with
* loading, using, modifying and/or developing and reproducing the software by
* the user in light of its specific status of free software, that may mean
* that it is complicated to manipulate, and that also therefore means that it
* is reserved for developers and experienced professionals having in-depth
* computer knowledge. Users are therefore encouraged to load and test the
* software's suitability as regards their requirements in conditions enabling
* the security of their systems and/or data to be ensured and, more generally,
* to use and operate it in the same conditions as regards security.
*
* The fact that you are presently reading this means you have had knowledge of
* the CeCILL-C license and that you accept its terms.
* ************************************************************************* */
#include "dirent.h"
#include <stdlib.h>
#include <string.h>
#define ENOMEM 10 /* FIXME */
/**
* opendir:
* Open a directory stream.
*
* @arg path the stream path.
* @return the stream pointer.
*/
DIR *opendir(const char *path)
{
FONTCHARACTER *fpath; size_t fsize;
DIR *dir; int ret;
/* get the FONTCHARACTER encoded path */
fsize = mbstowcs(NULL, path, 0);
if (fsize == (size_t)-1) { errno = EDOM; return (NULL); }
fpath = malloc(fsize + 1);
if (!fpath) { errno = ENOMEM; return (NULL); }
/* initialize the handle */
dir = malloc(sizeof(DIR));
if (!dir) { errno = ENOMEM; free(fpath); return (NULL); }
memset(dir, 0, sizeof(DIR));
dir->handle = -1;
/* find the first file */
ret = Bfile_FindFirst(fpath, &dir->handle, dir->path, &dir->info);
free(fpath); dir->lasterr = ret;
if (ret < 0 && dir->lasterr != IML_FILEERR_ENUMRATEEND) {
/* FIXME: return success if empty directory? */
errno = __errno_from_fileerr(ret);
free(dir);
return (NULL);
}
/* the stream has been opened! */
return (dir);
}
/**
* closedir:
* Close a directory stream.
*
* @arg dir the directory stream pointer.
* @return 0 on success, -1 on error.
*/
int closedir(DIR *dir)
{
/* close the handle */
int ret = Bfile_FindClose(dir->handle);
if (ret < 0) {
errno = __errno_from_fileerr(ret);
return (-1);
}
/* free and exit */
free(dir);
return (0);
}
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