mirror of
https://github.com/CTCaer/RetroArch.git
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302 lines
8.4 KiB
C
302 lines
8.4 KiB
C
/* Copyright (C) 2010-2015 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (dir_list.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <file/dir_list.h>
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#include <file/file_path.h>
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#include <compat/strl.h>
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#include <compat/posix_string.h>
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#if defined(_WIN32)
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#ifdef _MSC_VER
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#define setmode _setmode
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#endif
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#ifdef _XBOX
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#include <xtl.h>
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#define INVALID_FILE_ATTRIBUTES -1
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#else
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#include <io.h>
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#include <fcntl.h>
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#include <direct.h>
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#include <windows.h>
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#endif
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#else
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <unistd.h>
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#endif
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#include <retro_miscellaneous.h>
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static int qstrcmp_plain(const void *a_, const void *b_)
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{
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const struct string_list_elem *a = (const struct string_list_elem*)a_;
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const struct string_list_elem *b = (const struct string_list_elem*)b_;
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return strcasecmp(a->data, b->data);
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}
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static int qstrcmp_dir(const void *a_, const void *b_)
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{
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const struct string_list_elem *a = (const struct string_list_elem*)a_;
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const struct string_list_elem *b = (const struct string_list_elem*)b_;
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int a_type = a->attr.i;
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int b_type = b->attr.i;
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/* Sort directories before files. */
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if (a_type != b_type)
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return b_type - a_type;
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return strcasecmp(a->data, b->data);
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}
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/**
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* dir_list_sort:
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* @list : pointer to the directory listing.
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* @dir_first : move the directories in the listing to the top?
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*
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* Sorts a directory listing.
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*
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**/
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void dir_list_sort(struct string_list *list, bool dir_first)
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{
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if (list)
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qsort(list->elems, list->size, sizeof(struct string_list_elem),
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dir_first ? qstrcmp_dir : qstrcmp_plain);
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}
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/**
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* dir_list_free:
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* @list : pointer to the directory listing
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*
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* Frees a directory listing.
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*
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**/
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void dir_list_free(struct string_list *list)
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{
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string_list_free(list);
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}
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#ifndef _WIN32
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/**
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*
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* dirent_is_directory:
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* @path : path to the directory entry.
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* @entry : pointer to the directory entry.
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*
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* Is the directory listing entry a directory?
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*
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* Returns: true if directory listing entry is
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* a directory, false if not.
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*/
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static bool dirent_is_directory(const char *path,
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const struct dirent *entry)
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{
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#if defined(PSP)
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return (entry->d_stat.st_attr & FIO_SO_IFDIR) == FIO_SO_IFDIR;
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#elif defined(DT_DIR)
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if (entry->d_type == DT_DIR)
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return true;
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else if (entry->d_type == DT_UNKNOWN /* This can happen on certain file systems. */
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|| entry->d_type == DT_LNK)
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return path_is_directory(path);
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return false;
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#else /* dirent struct doesn't have d_type, do it the slow way ... */
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return path_is_directory(path);
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#endif
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}
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#endif
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/**
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* parse_dir_entry:
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* @name : name of the directory listing entry.
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* @file_path : file path of the directory listing entry.
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* @is_dir : is the directory listing a directory?
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* @include_dirs : include directories as part of the finished directory listing?
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* @list : pointer to directory listing.
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* @ext_list : pointer to allowed file extensions listing.
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* @file_ext : file extension of the directory listing entry.
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*
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* Parses a directory listing.
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*
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* Returns: zero on success, -1 on error, 1 if we should
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* continue to the next entry in the directory listing.
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**/
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static int parse_dir_entry(const char *name, char *file_path,
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bool is_dir, bool include_dirs,
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struct string_list *list, struct string_list *ext_list,
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const char *file_ext)
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{
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union string_list_elem_attr attr;
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bool is_compressed_file = false;
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bool supported_by_core = false;
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attr.i = RARCH_FILETYPE_UNSET;
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if (!is_dir)
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{
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is_compressed_file = path_is_compressed_file(file_path);
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if (string_list_find_elem_prefix(ext_list, ".", file_ext))
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supported_by_core = true;
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}
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if (!include_dirs && is_dir)
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return 1;
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if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0)
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return 1;
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if (!is_compressed_file && !is_dir && ext_list && !supported_by_core)
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return 1;
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if (is_dir)
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attr.i = RARCH_DIRECTORY;
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if (is_compressed_file)
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attr.i = RARCH_COMPRESSED_ARCHIVE;
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/* The order of these ifs is important.
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* If the file format is explicitly supported by the libretro-core, we
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* need to immediately load it and not designate it as a compressed file.
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*
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* Example: .zip could be supported as a image by the core and as a
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* compressed_file. In that case, we have to interpret it as a image.
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*
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* */
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if (supported_by_core)
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attr.i = RARCH_PLAIN_FILE;
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if (!string_list_append(list, file_path, attr))
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return -1;
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return 0;
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}
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/**
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* dir_list_new:
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* @dir : directory path.
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* @ext : allowed extensions of file directory entries to include.
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* @include_dirs : include directories as part of the finished directory listing?
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*
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* Create a directory listing.
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*
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* Returns: pointer to a directory listing of type 'struct string_list *' on success,
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* NULL in case of error. Has to be freed manually.
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**/
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struct string_list *dir_list_new(const char *dir,
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const char *ext, bool include_dirs)
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{
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#ifdef _WIN32
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WIN32_FIND_DATA ffd;
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HANDLE hFind = INVALID_HANDLE_VALUE;
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#else
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DIR *directory = NULL;
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const struct dirent *entry = NULL;
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#endif
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char path_buf[PATH_MAX_LENGTH] = {0};
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struct string_list *ext_list = NULL;
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struct string_list *list = NULL;
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(void)path_buf;
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if (!(list = string_list_new()))
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return NULL;
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if (ext)
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ext_list = string_split(ext, "|");
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#ifdef _WIN32
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snprintf(path_buf, sizeof(path_buf), "%s\\*", dir);
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hFind = FindFirstFile(path_buf, &ffd);
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if (hFind == INVALID_HANDLE_VALUE)
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goto error;
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do
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{
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int ret = 0;
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char file_path[PATH_MAX_LENGTH] = {0};
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const char *name = ffd.cFileName;
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const char *file_ext = path_get_extension(name);
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bool is_dir = ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
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fill_pathname_join(file_path, dir, name, sizeof(file_path));
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ret = parse_dir_entry(name, file_path, is_dir,
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include_dirs, list, ext_list, file_ext);
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if (ret == -1)
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goto error;
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if (ret == 1)
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continue;
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}while (FindNextFile(hFind, &ffd) != 0);
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FindClose(hFind);
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string_list_free(ext_list);
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return list;
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error:
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if (hFind != INVALID_HANDLE_VALUE)
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FindClose(hFind);
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#else
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directory = opendir(dir);
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if (!directory)
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goto error;
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while ((entry = readdir(directory)))
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{
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int ret = 0;
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char file_path[PATH_MAX_LENGTH] = {0};
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const char *name = entry->d_name;
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const char *file_ext = path_get_extension(name);
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bool is_dir = false;
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fill_pathname_join(file_path, dir, name, sizeof(file_path));
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is_dir = dirent_is_directory(file_path, entry);
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ret = parse_dir_entry(name, file_path, is_dir,
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include_dirs, list, ext_list, file_ext);
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if (ret == -1)
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goto error;
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if (ret == 1)
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continue;
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}
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closedir(directory);
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string_list_free(ext_list);
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return list;
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error:
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if (directory)
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closedir(directory);
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#endif
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string_list_free(list);
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string_list_free(ext_list);
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return NULL;
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}
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