/* Copyright (C) 2010-2015 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (dir_list.c).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <file/dir_list.h>
#include <file/file_path.h>
#include <string/string_list.h>
#include <compat/strl.h>
#include <retro_dirent.h>
#include <retro_miscellaneous.h>
static int qstrcmp_plain(const void *a_, const void *b_)
{
const struct string_list_elem *a = (const struct string_list_elem*)a_;
const struct string_list_elem *b = (const struct string_list_elem*)b_;
return strcasecmp(a->data, b->data);
}
static int qstrcmp_dir(const void *a_, const void *b_)
{
const struct string_list_elem *a = (const struct string_list_elem*)a_;
const struct string_list_elem *b = (const struct string_list_elem*)b_;
int a_type = a->attr.i;
int b_type = b->attr.i;
/* Sort directories before files. */
if (a_type != b_type)
return b_type - a_type;
return strcasecmp(a->data, b->data);
}
/**
* dir_list_sort:
* @list : pointer to the directory listing.
* @dir_first : move the directories in the listing to the top?
*
* Sorts a directory listing.
*
**/
void dir_list_sort(struct string_list *list, bool dir_first)
{
if (list)
qsort(list->elems, list->size, sizeof(struct string_list_elem),
dir_first ? qstrcmp_dir : qstrcmp_plain);
}
/**
* dir_list_free:
* @list : pointer to the directory listing
*
* Frees a directory listing.
*
**/
void dir_list_free(struct string_list *list)
{
string_list_free(list);
}
/**
* parse_dir_entry:
* @name : name of the directory listing entry.
* @file_path : file path of the directory listing entry.
* @is_dir : is the directory listing a directory?
* @include_dirs : include directories as part of the finished directory listing?
* @include_compressed : Include compressed files, even if not part of ext_list.
* @list : pointer to directory listing.
* @ext_list : pointer to allowed file extensions listing.
* @file_ext : file extension of the directory listing entry.
*
* Parses a directory listing.
*
* Returns: zero on success, -1 on error, 1 if we should
* continue to the next entry in the directory listing.
**/
static int parse_dir_entry(const char *name, char *file_path,
bool is_dir, bool include_dirs, bool include_compressed,
struct string_list *list, struct string_list *ext_list,
const char *file_ext)
{
union string_list_elem_attr attr;
bool is_compressed_file = false;
bool supported_by_core = false;
attr.i = RARCH_FILETYPE_UNSET;
if (!is_dir)
{
is_compressed_file = path_is_compressed_file(file_path);
if (string_list_find_elem_prefix(ext_list, ".", file_ext))
supported_by_core = true;
}
if (!include_dirs && is_dir)
return 1;
if (!strcmp(name, ".") || !strcmp(name, ".."))
return 1;
if (!is_dir && ext_list &&
((!is_compressed_file && !supported_by_core) ||
(!supported_by_core && !include_compressed)))
return 1;
if (is_dir)
attr.i = RARCH_DIRECTORY;
if (is_compressed_file)
attr.i = RARCH_COMPRESSED_ARCHIVE;
/* The order of these ifs is important.
* If the file format is explicitly supported by the libretro-core, we
* need to immediately load it and not designate it as a compressed file.
*
* Example: .zip could be supported as a image by the core and as a
* compressed_file. In that case, we have to interpret it as a image.
*
* */
if (supported_by_core)
attr.i = RARCH_PLAIN_FILE;
if (!string_list_append(list, file_path, attr))
return -1;
return 0;
}
/**
* dir_list_new:
* @dir : directory path.
* @ext : allowed extensions of file directory entries to include.
* @include_dirs : include directories as part of the finished directory listing?
* @include_compressed : Only include files which match ext. Do not try to match compressed files, etc.
*
* Create a directory listing.
*
* Returns: pointer to a directory listing of type 'struct string_list *' on success,
* NULL in case of error. Has to be freed manually.
**/
struct string_list *dir_list_new(const char *dir,
const char *ext, bool include_dirs, bool include_compressed)
{
struct RDIR *entry = NULL;
struct string_list *ext_list = NULL;
struct string_list *list = NULL;
if (!(list = string_list_new()))
return NULL;
if (ext)
ext_list = string_split(ext, "|");
entry = retro_opendir(dir);
if (!entry)
goto error;
if (retro_dirent_error(entry))
goto error;
while (retro_readdir(entry))
{
char file_path[PATH_MAX_LENGTH];
int ret = 0;
const char *name = retro_dirent_get_name(entry);
bool is_dir = retro_dirent_is_dir(entry, file_path);
const char *file_ext = path_get_extension(name);
fill_pathname_join(file_path, dir, name, sizeof(file_path));
ret = parse_dir_entry(name, file_path, is_dir,
include_dirs, include_compressed, list, ext_list, file_ext);
if (ret == -1)
goto error;
if (ret == 1)
continue;
}
retro_closedir(entry);
string_list_free(ext_list);
return list;
error:
retro_closedir(entry);
string_list_free(list);
string_list_free(ext_list);
return NULL;
}