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b097adf18a
(Modulo the changes in https://gitlab.freedesktop.org/xdg/xdgmime/-/merge_requests/10 which are still under discussion. Plus the proposed warning fixes from https://gitlab.freedesktop.org/xdg/xdgmime/-/merge_requests/33.) Signed-off-by: Philip Withnall <pwithnall@gnome.org> Fixes: #3191
1029 lines
23 KiB
C
1029 lines
23 KiB
C
/* -*- mode: C; c-file-style: "gnu" -*- */
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/* xdgmime.c: XDG Mime Spec mime resolver. Based on version 0.11 of the spec.
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*
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* More info can be found at http://www.freedesktop.org/standards/
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*
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* Copyright (C) 2003,2004 Red Hat, Inc.
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* Copyright (C) 2003,2004 Jonathan Blandford <jrb@alum.mit.edu>
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later or AFL-2.0
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "xdgmime.h"
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#include "xdgmimeint.h"
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#include "xdgmimeglob.h"
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#include "xdgmimemagic.h"
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#include "xdgmimealias.h"
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#include "xdgmimeicon.h"
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#include "xdgmimeparent.h"
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#include "xdgmimecache.h"
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <assert.h>
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#ifndef S_ISREG
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#define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
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#endif
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typedef struct XdgDirTimeList XdgDirTimeList;
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typedef struct XdgCallbackList XdgCallbackList;
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static int need_reread = TRUE;
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static time_t last_stat_time = 0;
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static XdgGlobHash *global_hash = NULL;
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static XdgMimeMagic *global_magic = NULL;
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static XdgAliasList *alias_list = NULL;
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static XdgParentList *parent_list = NULL;
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static XdgDirTimeList *dir_time_list = NULL;
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static XdgCallbackList *callback_list = NULL;
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static XdgIconList *icon_list = NULL;
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static XdgIconList *generic_icon_list = NULL;
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static char **xdg_dirs = NULL; /* NULL terminated */
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XdgMimeCache **_caches = NULL;
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static int n_caches = 0;
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const char xdg_mime_type_unknown[] = "application/octet-stream";
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const char xdg_mime_type_empty[] = "application/x-zerosize";
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const char xdg_mime_type_textplain[] = "text/plain";
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enum
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{
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XDG_CHECKED_UNCHECKED,
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XDG_CHECKED_VALID,
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XDG_CHECKED_INVALID
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};
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struct XdgDirTimeList
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{
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time_t mtime;
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char *directory_name;
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int checked;
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XdgDirTimeList *next;
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};
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struct XdgCallbackList
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{
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XdgCallbackList *next;
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XdgCallbackList *prev;
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int callback_id;
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XdgMimeCallback callback;
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void *data;
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XdgMimeDestroy destroy;
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};
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/* Function called by xdg_run_command_on_dirs. If it returns TRUE, further
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* directories aren't looked at */
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typedef int (*XdgDirectoryFunc) (const char *directory,
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void *user_data);
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static void
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xdg_dir_time_list_add (char *file_name,
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time_t mtime)
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{
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XdgDirTimeList *list;
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for (list = dir_time_list; list; list = list->next)
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{
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if (strcmp (list->directory_name, file_name) == 0)
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{
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free (file_name);
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return;
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}
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}
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list = calloc (1, sizeof (XdgDirTimeList));
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list->checked = XDG_CHECKED_UNCHECKED;
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list->directory_name = file_name;
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list->mtime = mtime;
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list->next = dir_time_list;
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dir_time_list = list;
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}
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static void
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xdg_dir_time_list_free (XdgDirTimeList *list)
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{
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XdgDirTimeList *next;
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while (list)
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{
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next = list->next;
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free (list->directory_name);
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free (list);
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list = next;
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}
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}
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static int
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xdg_mime_init_from_directory (const char *directory,
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void *user_data __attribute__((__unused__)))
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{
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char *file_name;
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struct stat st;
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assert (directory != NULL);
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file_name = malloc (strlen (directory) + strlen ("/mime.cache") + 1);
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strcpy (file_name, directory); strcat (file_name, "/mime.cache");
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if (stat (file_name, &st) == 0)
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{
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XdgMimeCache *cache = _xdg_mime_cache_new_from_file (file_name);
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if (cache != NULL)
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{
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xdg_dir_time_list_add (file_name, st.st_mtime);
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_caches = realloc (_caches, sizeof (XdgMimeCache *) * (n_caches + 2));
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_caches[n_caches] = cache;
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_caches[n_caches + 1] = NULL;
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n_caches++;
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return FALSE;
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}
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}
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free (file_name);
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file_name = malloc (strlen (directory) + strlen ("/globs2") + 1);
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strcpy (file_name, directory); strcat (file_name, "/globs2");
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if (stat (file_name, &st) == 0)
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{
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_xdg_mime_glob_read_from_file (global_hash, file_name, TRUE);
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xdg_dir_time_list_add (file_name, st.st_mtime);
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}
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else
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{
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free (file_name);
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file_name = malloc (strlen (directory) + strlen ("/globs") + 1);
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strcpy (file_name, directory); strcat (file_name, "/globs");
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if (stat (file_name, &st) == 0)
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{
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_xdg_mime_glob_read_from_file (global_hash, file_name, FALSE);
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xdg_dir_time_list_add (file_name, st.st_mtime);
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}
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else
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{
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free (file_name);
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}
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}
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file_name = malloc (strlen (directory) + strlen ("/magic") + 1);
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strcpy (file_name, directory); strcat (file_name, "/magic");
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if (stat (file_name, &st) == 0)
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{
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_xdg_mime_magic_read_from_file (global_magic, file_name);
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xdg_dir_time_list_add (file_name, st.st_mtime);
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}
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else
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{
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free (file_name);
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}
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file_name = malloc (strlen (directory) + strlen ("/aliases") + 1);
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strcpy (file_name, directory); strcat (file_name, "/aliases");
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_xdg_mime_alias_read_from_file (alias_list, file_name);
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free (file_name);
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file_name = malloc (strlen (directory) + strlen ("/subclasses") + 1);
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strcpy (file_name, directory); strcat (file_name, "/subclasses");
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_xdg_mime_parent_read_from_file (parent_list, file_name);
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free (file_name);
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file_name = malloc (strlen (directory) + strlen ("/icons") + 1);
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strcpy (file_name, directory); strcat (file_name, "/icons");
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_xdg_mime_icon_read_from_file (icon_list, file_name);
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free (file_name);
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file_name = malloc (strlen (directory) + strlen ("/generic-icons") + 1);
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strcpy (file_name, directory); strcat (file_name, "/generic-icons");
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_xdg_mime_icon_read_from_file (generic_icon_list, file_name);
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free (file_name);
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return FALSE; /* Keep processing */
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}
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/* Set @xdg_dirs from the environment. It must not have been set already. */
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static void
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xdg_init_dirs (void)
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{
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const char *xdg_data_home, *home, *xdg_data_dirs;
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const char *ptr;
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size_t n_dirs = 0;
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size_t i, current_dir;
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assert (xdg_dirs == NULL);
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xdg_data_home = getenv ("XDG_DATA_HOME");
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home = getenv ("HOME");
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xdg_data_dirs = getenv ("XDG_DATA_DIRS");
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if (xdg_data_dirs == NULL)
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xdg_data_dirs = "/usr/local/share/:/usr/share/";
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/* Work out how many dirs we’re dealing with. */
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if (xdg_data_home != NULL || home != NULL)
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n_dirs++;
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n_dirs++; /* initial entry in @xdg_data_dirs */
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for (i = 0; xdg_data_dirs[i] != '\0'; i++)
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if (xdg_data_dirs[i] == ':')
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n_dirs++;
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xdg_dirs = calloc (n_dirs + 1 /* NULL terminator */, sizeof (char *));
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current_dir = 0;
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/* $XDG_DATA_HOME */
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if (xdg_data_home != NULL)
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{
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char *mime_subdir;
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mime_subdir = malloc (strlen (xdg_data_home) + strlen ("/mime/") + 1);
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strcpy (mime_subdir, xdg_data_home);
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strcat (mime_subdir, "/mime/");
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xdg_dirs[current_dir++] = mime_subdir;
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}
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else if (home != NULL)
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{
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char *guessed_xdg_home;
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guessed_xdg_home = malloc (strlen (home) + strlen ("/.local/share/mime/") + 1);
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strcpy (guessed_xdg_home, home);
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strcat (guessed_xdg_home, "/.local/share/mime/");
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xdg_dirs[current_dir++] = guessed_xdg_home;
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}
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/* $XDG_DATA_DIRS */
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ptr = xdg_data_dirs;
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while (*ptr != '\000')
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{
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const char *end_ptr;
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char *dir;
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int len;
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end_ptr = ptr;
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while (*end_ptr != ':' && *end_ptr != '\000')
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end_ptr ++;
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if (end_ptr == ptr)
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{
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ptr++;
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continue;
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}
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if (*end_ptr == ':')
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len = end_ptr - ptr;
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else
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len = end_ptr - ptr + 1;
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dir = malloc (len + strlen ("/mime/") + 1);
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strncpy (dir, ptr, len);
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dir[len] = '\0';
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strcat (dir, "/mime/");
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xdg_dirs[current_dir++] = dir;
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ptr = end_ptr;
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}
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/* NULL terminator */
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xdg_dirs[current_dir] = NULL;
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need_reread = TRUE;
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}
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/* Runs a command on all the directories in the search path (@xdg_dirs). */
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static void
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xdg_run_command_on_dirs (XdgDirectoryFunc func,
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void *user_data)
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{
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size_t i;
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if (xdg_dirs == NULL)
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xdg_init_dirs ();
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for (i = 0; xdg_dirs[i] != NULL; i++)
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{
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if ((func) (xdg_dirs[i], user_data))
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return;
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}
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}
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/* Allows the calling code to override the directories used by xdgmime, without
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* having to change environment variables in a running process (which is not
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* thread safe). This is intended to be used by tests. The changes will be
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* picked up by xdg_mime_init() next time public API is called.
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*
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* This will set @xdg_dirs. Directories in @dirs must be complete, including
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* the conventional `/mime` subdirectory. This is to allow tests to override
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* them without the need to create a subdirectory. */
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void
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xdg_mime_set_dirs (const char * const *dirs)
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{
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size_t i;
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for (i = 0; xdg_dirs != NULL && xdg_dirs[i] != NULL; i++)
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free (xdg_dirs[i]);
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free (xdg_dirs);
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xdg_dirs = NULL;
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if (dirs != NULL)
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{
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for (i = 0; dirs[i] != NULL; i++);
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xdg_dirs = calloc (i + 1 /* NULL terminator */, sizeof (char*));
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for (i = 0; dirs[i] != NULL; i++)
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xdg_dirs[i] = strdup (dirs[i]);
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xdg_dirs[i] = NULL;
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}
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need_reread = TRUE;
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}
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/* Checks file_path to make sure it has the same mtime as last time it was
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* checked. If it has a different mtime, or if the file doesn't exist, it
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* returns FALSE.
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*
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* FIXME: This doesn't protect against permission changes.
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*/
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static int
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xdg_check_file (const char *file_path,
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int *exists)
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{
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struct stat st;
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/* If the file exists */
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if (stat (file_path, &st) == 0)
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{
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XdgDirTimeList *list;
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if (exists)
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*exists = TRUE;
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for (list = dir_time_list; list; list = list->next)
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{
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if (! strcmp (list->directory_name, file_path))
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{
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if (st.st_mtime == list->mtime)
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list->checked = XDG_CHECKED_VALID;
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else
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list->checked = XDG_CHECKED_INVALID;
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return (list->checked != XDG_CHECKED_VALID);
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}
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}
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return TRUE;
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}
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if (exists)
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*exists = FALSE;
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return FALSE;
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}
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static int
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xdg_check_dir (const char *directory,
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void *user_data)
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{
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int invalid, exists;
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char *file_name;
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int* invalid_dir_list = user_data;
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assert (directory != NULL);
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/* Check the mime.cache file */
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file_name = malloc (strlen (directory) + strlen ("/mime.cache") + 1);
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strcpy (file_name, directory); strcat (file_name, "/mime.cache");
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invalid = xdg_check_file (file_name, &exists);
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free (file_name);
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if (invalid)
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{
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*invalid_dir_list = TRUE;
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return TRUE;
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}
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else if (exists)
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{
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return FALSE;
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}
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/* Check the globs file */
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file_name = malloc (strlen (directory) + strlen ("/globs") + 1);
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strcpy (file_name, directory); strcat (file_name, "/globs");
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invalid = xdg_check_file (file_name, NULL);
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free (file_name);
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if (invalid)
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{
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*invalid_dir_list = TRUE;
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return TRUE;
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}
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|
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/* Check the magic file */
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file_name = malloc (strlen (directory) + strlen ("/magic") + 1);
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strcpy (file_name, directory); strcat (file_name, "/magic");
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invalid = xdg_check_file (file_name, NULL);
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free (file_name);
|
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if (invalid)
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{
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*invalid_dir_list = TRUE;
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return TRUE;
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}
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|
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return FALSE; /* Keep processing */
|
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}
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|
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/* Walks through all the mime files stat()ing them to see if they've changed.
|
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* Returns TRUE if they have. */
|
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static int
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xdg_check_dirs (void)
|
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{
|
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XdgDirTimeList *list;
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int invalid_dir_list = FALSE;
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|
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for (list = dir_time_list; list; list = list->next)
|
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list->checked = XDG_CHECKED_UNCHECKED;
|
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|
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xdg_run_command_on_dirs (xdg_check_dir, &invalid_dir_list);
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|
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if (invalid_dir_list)
|
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return TRUE;
|
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|
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for (list = dir_time_list; list; list = list->next)
|
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{
|
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if (list->checked != XDG_CHECKED_VALID)
|
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return TRUE;
|
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}
|
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|
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return FALSE;
|
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}
|
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|
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/* We want to avoid stat()ing on every single mime call, so we only look for
|
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* newer files every 5 seconds. This will return TRUE if we need to reread the
|
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* mime data from disk.
|
||
*/
|
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static int
|
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xdg_check_time_and_dirs (void)
|
||
{
|
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struct timeval tv;
|
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time_t current_time;
|
||
int retval = FALSE;
|
||
|
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gettimeofday (&tv, NULL);
|
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current_time = tv.tv_sec;
|
||
|
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if (current_time >= last_stat_time + 5)
|
||
{
|
||
retval = xdg_check_dirs ();
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last_stat_time = current_time;
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}
|
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|
||
return retval;
|
||
}
|
||
|
||
/* Called in every public function. It reloads the hash function if need be.
|
||
*/
|
||
static void
|
||
xdg_mime_init (void)
|
||
{
|
||
if (xdg_check_time_and_dirs ())
|
||
{
|
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xdg_mime_shutdown ();
|
||
}
|
||
|
||
if (need_reread)
|
||
{
|
||
global_hash = _xdg_glob_hash_new ();
|
||
global_magic = _xdg_mime_magic_new ();
|
||
alias_list = _xdg_mime_alias_list_new ();
|
||
parent_list = _xdg_mime_parent_list_new ();
|
||
icon_list = _xdg_mime_icon_list_new ();
|
||
generic_icon_list = _xdg_mime_icon_list_new ();
|
||
|
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xdg_run_command_on_dirs (xdg_mime_init_from_directory, NULL);
|
||
|
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need_reread = FALSE;
|
||
}
|
||
}
|
||
|
||
const char *
|
||
xdg_mime_get_mime_type_for_data (const void *data,
|
||
size_t len,
|
||
int *result_prio)
|
||
{
|
||
const char *mime_type;
|
||
|
||
if (len == 0)
|
||
{
|
||
if (result_prio != NULL)
|
||
*result_prio = 100;
|
||
return XDG_MIME_TYPE_EMPTY;
|
||
}
|
||
|
||
xdg_mime_init ();
|
||
|
||
if (_caches)
|
||
mime_type = _xdg_mime_cache_get_mime_type_for_data (data, len, result_prio);
|
||
else
|
||
mime_type = _xdg_mime_magic_lookup_data (global_magic, data, len, result_prio, NULL, 0);
|
||
|
||
if (mime_type)
|
||
return mime_type;
|
||
|
||
return _xdg_binary_or_text_fallback(data, len);
|
||
}
|
||
|
||
const char *
|
||
xdg_mime_get_mime_type_for_file (const char *file_name,
|
||
struct stat *statbuf)
|
||
{
|
||
const char *mime_type;
|
||
/* currently, only a few globs occur twice, and none
|
||
* more often, so 5 seems plenty.
|
||
*/
|
||
const char *mime_types[5];
|
||
FILE *file;
|
||
unsigned char *data;
|
||
int max_extent;
|
||
int bytes_read;
|
||
struct stat buf;
|
||
const char *base_name;
|
||
int n;
|
||
|
||
if (file_name == NULL)
|
||
return NULL;
|
||
if (! _xdg_utf8_validate (file_name))
|
||
return NULL;
|
||
|
||
xdg_mime_init ();
|
||
|
||
if (_caches)
|
||
return _xdg_mime_cache_get_mime_type_for_file (file_name, statbuf);
|
||
|
||
base_name = _xdg_get_base_name (file_name);
|
||
n = _xdg_glob_hash_lookup_file_name (global_hash, base_name, mime_types, 5);
|
||
|
||
if (n == 1)
|
||
return mime_types[0];
|
||
|
||
if (!statbuf)
|
||
{
|
||
if (stat (file_name, &buf) != 0)
|
||
return XDG_MIME_TYPE_UNKNOWN;
|
||
|
||
statbuf = &buf;
|
||
}
|
||
|
||
if (!S_ISREG (statbuf->st_mode))
|
||
return XDG_MIME_TYPE_UNKNOWN;
|
||
|
||
/* FIXME: Need to make sure that max_extent isn't totally broken. This could
|
||
* be large and need getting from a stream instead of just reading it all
|
||
* in. */
|
||
max_extent = _xdg_mime_magic_get_buffer_extents (global_magic);
|
||
data = malloc (max_extent);
|
||
if (data == NULL)
|
||
return XDG_MIME_TYPE_UNKNOWN;
|
||
|
||
file = fopen (file_name, "r");
|
||
if (file == NULL)
|
||
{
|
||
free (data);
|
||
return XDG_MIME_TYPE_UNKNOWN;
|
||
}
|
||
|
||
bytes_read = fread (data, 1, max_extent, file);
|
||
if (ferror (file))
|
||
{
|
||
free (data);
|
||
fclose (file);
|
||
return XDG_MIME_TYPE_UNKNOWN;
|
||
}
|
||
|
||
mime_type = _xdg_mime_magic_lookup_data (global_magic, data, bytes_read, NULL,
|
||
mime_types, n);
|
||
|
||
if (!mime_type)
|
||
mime_type = _xdg_binary_or_text_fallback (data, bytes_read);
|
||
|
||
free (data);
|
||
fclose (file);
|
||
|
||
return mime_type;
|
||
}
|
||
|
||
const char *
|
||
xdg_mime_get_mime_type_from_file_name (const char *file_name)
|
||
{
|
||
const char *mime_type;
|
||
|
||
xdg_mime_init ();
|
||
|
||
if (_caches)
|
||
return _xdg_mime_cache_get_mime_type_from_file_name (file_name);
|
||
|
||
if (_xdg_glob_hash_lookup_file_name (global_hash, file_name, &mime_type, 1))
|
||
return mime_type;
|
||
else
|
||
return XDG_MIME_TYPE_UNKNOWN;
|
||
}
|
||
|
||
int
|
||
xdg_mime_get_mime_types_from_file_name (const char *file_name,
|
||
const char *mime_types[],
|
||
int n_mime_types)
|
||
{
|
||
xdg_mime_init ();
|
||
|
||
if (_caches)
|
||
return _xdg_mime_cache_get_mime_types_from_file_name (file_name, mime_types, n_mime_types);
|
||
|
||
return _xdg_glob_hash_lookup_file_name (global_hash, file_name, mime_types, n_mime_types);
|
||
}
|
||
|
||
int
|
||
xdg_mime_is_valid_mime_type (const char *mime_type)
|
||
{
|
||
/* FIXME: We should make this a better test
|
||
*/
|
||
return _xdg_utf8_validate (mime_type);
|
||
}
|
||
|
||
void
|
||
xdg_mime_shutdown (void)
|
||
{
|
||
XdgCallbackList *list;
|
||
|
||
/* FIXME: Need to make this (and the whole library) thread safe */
|
||
if (dir_time_list)
|
||
{
|
||
xdg_dir_time_list_free (dir_time_list);
|
||
dir_time_list = NULL;
|
||
}
|
||
|
||
if (global_hash)
|
||
{
|
||
_xdg_glob_hash_free (global_hash);
|
||
global_hash = NULL;
|
||
}
|
||
if (global_magic)
|
||
{
|
||
_xdg_mime_magic_free (global_magic);
|
||
global_magic = NULL;
|
||
}
|
||
|
||
if (alias_list)
|
||
{
|
||
_xdg_mime_alias_list_free (alias_list);
|
||
alias_list = NULL;
|
||
}
|
||
|
||
if (parent_list)
|
||
{
|
||
_xdg_mime_parent_list_free (parent_list);
|
||
parent_list = NULL;
|
||
}
|
||
|
||
if (icon_list)
|
||
{
|
||
_xdg_mime_icon_list_free (icon_list);
|
||
icon_list = NULL;
|
||
}
|
||
|
||
if (generic_icon_list)
|
||
{
|
||
_xdg_mime_icon_list_free (generic_icon_list);
|
||
generic_icon_list = NULL;
|
||
}
|
||
|
||
if (_caches)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < n_caches; i++)
|
||
_xdg_mime_cache_unref (_caches[i]);
|
||
free (_caches);
|
||
_caches = NULL;
|
||
n_caches = 0;
|
||
}
|
||
|
||
for (list = callback_list; list; list = list->next)
|
||
(list->callback) (list->data);
|
||
|
||
need_reread = TRUE;
|
||
}
|
||
|
||
int
|
||
xdg_mime_get_max_buffer_extents (void)
|
||
{
|
||
xdg_mime_init ();
|
||
|
||
if (_caches)
|
||
return _xdg_mime_cache_get_max_buffer_extents ();
|
||
|
||
return _xdg_mime_magic_get_buffer_extents (global_magic);
|
||
}
|
||
|
||
const char *
|
||
_xdg_mime_unalias_mime_type (const char *mime_type)
|
||
{
|
||
const char *lookup;
|
||
|
||
if (_caches)
|
||
return _xdg_mime_cache_unalias_mime_type (mime_type);
|
||
|
||
if ((lookup = _xdg_mime_alias_list_lookup (alias_list, mime_type)) != NULL)
|
||
return lookup;
|
||
|
||
return mime_type;
|
||
}
|
||
|
||
const char *
|
||
xdg_mime_unalias_mime_type (const char *mime_type)
|
||
{
|
||
xdg_mime_init ();
|
||
|
||
return _xdg_mime_unalias_mime_type (mime_type);
|
||
}
|
||
|
||
int
|
||
_xdg_mime_mime_type_equal (const char *mime_a,
|
||
const char *mime_b)
|
||
{
|
||
const char *unalias_a, *unalias_b;
|
||
|
||
unalias_a = _xdg_mime_unalias_mime_type (mime_a);
|
||
unalias_b = _xdg_mime_unalias_mime_type (mime_b);
|
||
|
||
if (strcmp (unalias_a, unalias_b) == 0)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
xdg_mime_mime_type_equal (const char *mime_a,
|
||
const char *mime_b)
|
||
{
|
||
xdg_mime_init ();
|
||
|
||
return _xdg_mime_mime_type_equal (mime_a, mime_b);
|
||
}
|
||
|
||
int
|
||
xdg_mime_media_type_equal (const char *mime_a,
|
||
const char *mime_b)
|
||
{
|
||
char *sep;
|
||
|
||
sep = strchr (mime_a, '/');
|
||
|
||
if (sep && strncmp (mime_a, mime_b, sep - mime_a + 1) == 0)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
#if 1
|
||
static int
|
||
ends_with (const char *str,
|
||
const char *suffix)
|
||
{
|
||
int length;
|
||
int suffix_length;
|
||
|
||
length = strlen (str);
|
||
suffix_length = strlen (suffix);
|
||
if (length < suffix_length)
|
||
return 0;
|
||
|
||
if (strcmp (str + length - suffix_length, suffix) == 0)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
xdg_mime_is_super_type (const char *mime)
|
||
{
|
||
return ends_with (mime, "/*");
|
||
}
|
||
#endif
|
||
|
||
int
|
||
_xdg_mime_mime_type_subclass (const char *mime,
|
||
const char *base,
|
||
const char ***seen)
|
||
{
|
||
const char *umime, *ubase, *parent;
|
||
const char **parents, **first_seen = NULL, **new_seen;
|
||
|
||
int i, ret = 0;
|
||
|
||
if (_caches)
|
||
return _xdg_mime_cache_mime_type_subclass (mime, base, NULL);
|
||
|
||
umime = _xdg_mime_unalias_mime_type (mime);
|
||
ubase = _xdg_mime_unalias_mime_type (base);
|
||
|
||
if (strcmp (umime, ubase) == 0)
|
||
return 1;
|
||
|
||
#if 1
|
||
/* Handle supertypes */
|
||
if (xdg_mime_is_super_type (ubase) &&
|
||
xdg_mime_media_type_equal (umime, ubase))
|
||
return 1;
|
||
#endif
|
||
|
||
/* Handle special cases text/plain and application/octet-stream */
|
||
if (strcmp (ubase, "text/plain") == 0 &&
|
||
strncmp (umime, "text/", 5) == 0)
|
||
return 1;
|
||
|
||
if (strcmp (ubase, "application/octet-stream") == 0 &&
|
||
strncmp (umime, "inode/", 6) != 0)
|
||
return 1;
|
||
|
||
if (!seen)
|
||
{
|
||
first_seen = calloc (1, sizeof (char *));
|
||
seen = &first_seen;
|
||
}
|
||
|
||
parents = _xdg_mime_parent_list_lookup (parent_list, umime);
|
||
for (; parents && *parents; parents++)
|
||
{
|
||
parent = *parents;
|
||
|
||
/* Detect and avoid buggy circular relationships */
|
||
for (i = 0; (*seen)[i] != NULL; i++)
|
||
if (parent == (*seen)[i])
|
||
goto next_parent;
|
||
new_seen = realloc (*seen, (i + 2) * sizeof (char *));
|
||
if (!new_seen)
|
||
goto done;
|
||
new_seen[i] = parent;
|
||
new_seen[i + 1] = NULL;
|
||
*seen = new_seen;
|
||
|
||
if (_xdg_mime_mime_type_subclass (parent, ubase, seen))
|
||
{
|
||
ret = 1;
|
||
goto done;
|
||
}
|
||
|
||
next_parent:
|
||
continue;
|
||
}
|
||
|
||
done:
|
||
free (first_seen);
|
||
return ret;
|
||
}
|
||
|
||
int
|
||
xdg_mime_mime_type_subclass (const char *mime,
|
||
const char *base)
|
||
{
|
||
xdg_mime_init ();
|
||
|
||
return _xdg_mime_mime_type_subclass (mime, base, NULL);
|
||
}
|
||
|
||
char **
|
||
xdg_mime_list_mime_parents (const char *mime)
|
||
{
|
||
const char **parents;
|
||
char **result;
|
||
int i, n;
|
||
|
||
xdg_mime_init ();
|
||
|
||
if (_caches)
|
||
return _xdg_mime_cache_list_mime_parents (mime);
|
||
|
||
parents = xdg_mime_get_mime_parents (mime);
|
||
|
||
if (!parents)
|
||
return NULL;
|
||
|
||
for (i = 0; parents[i]; i++) ;
|
||
|
||
n = (i + 1) * sizeof (char *);
|
||
result = (char **) malloc (n);
|
||
memcpy (result, parents, n);
|
||
|
||
return result;
|
||
}
|
||
|
||
const char **
|
||
xdg_mime_get_mime_parents (const char *mime)
|
||
{
|
||
const char *umime;
|
||
|
||
xdg_mime_init ();
|
||
|
||
umime = _xdg_mime_unalias_mime_type (mime);
|
||
|
||
return _xdg_mime_parent_list_lookup (parent_list, umime);
|
||
}
|
||
|
||
void
|
||
xdg_mime_dump (void)
|
||
{
|
||
xdg_mime_init();
|
||
|
||
printf ("*** ALIASES ***\n\n");
|
||
_xdg_mime_alias_list_dump (alias_list);
|
||
printf ("\n*** PARENTS ***\n\n");
|
||
_xdg_mime_parent_list_dump (parent_list);
|
||
printf ("\n*** CACHE ***\n\n");
|
||
_xdg_glob_hash_dump (global_hash);
|
||
printf ("\n*** GLOBS ***\n\n");
|
||
_xdg_glob_hash_dump (global_hash);
|
||
printf ("\n*** GLOBS REVERSE TREE ***\n\n");
|
||
_xdg_mime_cache_glob_dump ();
|
||
}
|
||
|
||
|
||
/* Registers a function to be called every time the mime database reloads its files
|
||
*/
|
||
int
|
||
xdg_mime_register_reload_callback (XdgMimeCallback callback,
|
||
void *data,
|
||
XdgMimeDestroy destroy)
|
||
{
|
||
XdgCallbackList *list_el;
|
||
static int callback_id = 1;
|
||
|
||
/* Make a new list element */
|
||
list_el = calloc (1, sizeof (XdgCallbackList));
|
||
list_el->callback_id = callback_id;
|
||
list_el->callback = callback;
|
||
list_el->data = data;
|
||
list_el->destroy = destroy;
|
||
list_el->next = callback_list;
|
||
if (list_el->next)
|
||
list_el->next->prev = list_el;
|
||
|
||
callback_list = list_el;
|
||
callback_id ++;
|
||
|
||
return callback_id - 1;
|
||
}
|
||
|
||
void
|
||
xdg_mime_remove_callback (int callback_id)
|
||
{
|
||
XdgCallbackList *list;
|
||
|
||
for (list = callback_list; list; list = list->next)
|
||
{
|
||
if (list->callback_id == callback_id)
|
||
{
|
||
if (list->next)
|
||
list->next = list->prev;
|
||
|
||
if (list->prev)
|
||
list->prev->next = list->next;
|
||
else
|
||
callback_list = list->next;
|
||
|
||
/* invoke the destroy handler */
|
||
(list->destroy) (list->data);
|
||
free (list);
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
const char *
|
||
xdg_mime_get_icon (const char *mime)
|
||
{
|
||
xdg_mime_init ();
|
||
|
||
if (_caches)
|
||
return _xdg_mime_cache_get_icon (mime);
|
||
|
||
return _xdg_mime_icon_list_lookup (icon_list, mime);
|
||
}
|
||
|
||
const char *
|
||
xdg_mime_get_generic_icon (const char *mime)
|
||
{
|
||
xdg_mime_init ();
|
||
|
||
if (_caches)
|
||
return _xdg_mime_cache_get_generic_icon (mime);
|
||
|
||
return _xdg_mime_icon_list_lookup (generic_icon_list, mime);
|
||
}
|