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733 lines
16 KiB
C
733 lines
16 KiB
C
/* -*- mode: C; c-file-style: "gnu" -*- */
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/* xdgmimeglob.c: Private file. Datastructure for storing the globs.
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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 Red Hat, Inc.
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* Copyright (C) 2003 Jonathan Blandford <jrb@alum.mit.edu>
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*
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* Licensed under the Academic Free License version 2.0
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* Or under the following terms:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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 "xdgmimeglob.h"
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#include "xdgmimeint.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <assert.h>
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#include <string.h>
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#include <fnmatch.h>
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#ifndef MAX
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#define MAX(a,b) ((a) > (b) ? (a) : (b))
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#endif
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#ifndef FALSE
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#define FALSE (0)
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#endif
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#ifndef TRUE
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#define TRUE (!FALSE)
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#endif
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typedef struct XdgGlobHashNode XdgGlobHashNode;
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typedef struct XdgGlobList XdgGlobList;
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struct XdgGlobHashNode
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{
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xdg_unichar_t character;
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const char *mime_type;
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int weight;
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int case_sensitive;
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XdgGlobHashNode *next;
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XdgGlobHashNode *child;
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};
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struct XdgGlobList
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{
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const char *data;
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const char *mime_type;
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int weight;
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int case_sensitive;
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XdgGlobList *next;
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};
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struct XdgGlobHash
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{
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XdgGlobList *literal_list;
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XdgGlobHashNode *simple_node;
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XdgGlobList *full_list;
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};
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/* XdgGlobList
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*/
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static XdgGlobList *
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_xdg_glob_list_new (void)
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{
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XdgGlobList *new_element;
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new_element = calloc (1, sizeof (XdgGlobList));
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return new_element;
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}
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/* Frees glob_list and all of it's children */
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static void
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_xdg_glob_list_free (XdgGlobList *glob_list)
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{
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XdgGlobList *ptr, *next;
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ptr = glob_list;
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while (ptr != NULL)
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{
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next = ptr->next;
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if (ptr->data)
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free ((void *) ptr->data);
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if (ptr->mime_type)
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free ((void *) ptr->mime_type);
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free (ptr);
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ptr = next;
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}
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}
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static XdgGlobList *
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_xdg_glob_list_append (XdgGlobList *glob_list,
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void *data,
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const char *mime_type,
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int weight,
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int case_sensitive)
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{
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XdgGlobList *new_element;
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XdgGlobList *tmp_element;
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tmp_element = glob_list;
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while (tmp_element != NULL)
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{
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if (strcmp (tmp_element->data, data) == 0 &&
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strcmp (tmp_element->mime_type, mime_type) == 0)
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return glob_list;
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tmp_element = tmp_element->next;
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}
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new_element = _xdg_glob_list_new ();
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new_element->data = data;
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new_element->mime_type = mime_type;
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new_element->weight = weight;
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new_element->case_sensitive = case_sensitive;
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if (glob_list == NULL)
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return new_element;
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tmp_element = glob_list;
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while (tmp_element->next != NULL)
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tmp_element = tmp_element->next;
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tmp_element->next = new_element;
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return glob_list;
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}
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/* XdgGlobHashNode
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*/
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static XdgGlobHashNode *
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_xdg_glob_hash_node_new (void)
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{
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XdgGlobHashNode *glob_hash_node;
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glob_hash_node = calloc (1, sizeof (XdgGlobHashNode));
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return glob_hash_node;
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}
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#ifdef NOT_USED_IN_GIO
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static void
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_xdg_glob_hash_node_dump (XdgGlobHashNode *glob_hash_node,
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int depth)
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{
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int i;
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for (i = 0; i < depth; i++)
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printf (" ");
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printf ("%c", (char)glob_hash_node->character);
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if (glob_hash_node->mime_type)
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printf (" - %s %d\n", glob_hash_node->mime_type, glob_hash_node->weight);
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else
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printf ("\n");
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if (glob_hash_node->child)
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_xdg_glob_hash_node_dump (glob_hash_node->child, depth + 1);
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if (glob_hash_node->next)
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_xdg_glob_hash_node_dump (glob_hash_node->next, depth);
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}
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#endif
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static XdgGlobHashNode *
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_xdg_glob_hash_insert_ucs4 (XdgGlobHashNode *glob_hash_node,
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xdg_unichar_t *text,
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const char *mime_type,
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int weight,
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int case_sensitive)
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{
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XdgGlobHashNode *node;
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xdg_unichar_t character;
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character = text[0];
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if ((glob_hash_node == NULL) ||
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(character < glob_hash_node->character))
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{
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node = _xdg_glob_hash_node_new ();
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node->character = character;
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node->next = glob_hash_node;
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glob_hash_node = node;
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}
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else if (character == glob_hash_node->character)
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{
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node = glob_hash_node;
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}
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else
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{
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XdgGlobHashNode *prev_node;
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int found_node = FALSE;
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/* Look for the first character of text in glob_hash_node, and insert it if we
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* have to.*/
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prev_node = glob_hash_node;
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node = prev_node->next;
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while (node != NULL)
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{
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if (character < node->character)
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{
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node = _xdg_glob_hash_node_new ();
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node->character = character;
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node->next = prev_node->next;
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prev_node->next = node;
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found_node = TRUE;
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break;
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}
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else if (character == node->character)
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{
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found_node = TRUE;
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break;
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}
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prev_node = node;
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node = node->next;
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}
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if (! found_node)
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{
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node = _xdg_glob_hash_node_new ();
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node->character = character;
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node->next = prev_node->next;
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prev_node->next = node;
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}
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}
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text++;
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if (*text == 0)
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{
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if (node->mime_type)
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{
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if (strcmp (node->mime_type, mime_type) != 0)
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{
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XdgGlobHashNode *child;
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int found_node = FALSE;
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child = node->child;
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while (child && child->character == 0)
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{
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if (strcmp (child->mime_type, mime_type) == 0)
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{
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found_node = TRUE;
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break;
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}
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child = child->next;
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}
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if (!found_node)
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{
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child = _xdg_glob_hash_node_new ();
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child->character = 0;
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child->mime_type = strdup (mime_type);
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child->weight = weight;
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child->case_sensitive = case_sensitive;
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child->child = NULL;
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child->next = node->child;
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node->child = child;
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}
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}
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}
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else
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{
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node->mime_type = strdup (mime_type);
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node->weight = weight;
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node->case_sensitive = case_sensitive;
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}
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}
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else
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{
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node->child = _xdg_glob_hash_insert_ucs4 (node->child, text, mime_type, weight, case_sensitive);
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}
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return glob_hash_node;
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}
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/* glob must be valid UTF-8 */
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static XdgGlobHashNode *
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_xdg_glob_hash_insert_text (XdgGlobHashNode *glob_hash_node,
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const char *text,
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const char *mime_type,
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int weight,
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int case_sensitive)
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{
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XdgGlobHashNode *node;
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xdg_unichar_t *unitext;
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int len;
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unitext = _xdg_convert_to_ucs4 (text, &len);
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_xdg_reverse_ucs4 (unitext, len);
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node = _xdg_glob_hash_insert_ucs4 (glob_hash_node, unitext, mime_type, weight, case_sensitive);
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free (unitext);
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return node;
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}
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typedef struct {
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const char *mime;
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int weight;
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} MimeWeight;
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static int
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_xdg_glob_hash_node_lookup_file_name (XdgGlobHashNode *glob_hash_node,
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const char *file_name,
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int len,
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int case_sensitive_check,
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MimeWeight mime_types[],
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int n_mime_types)
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{
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int n;
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XdgGlobHashNode *node;
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xdg_unichar_t character;
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if (glob_hash_node == NULL)
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return 0;
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character = file_name[len - 1];
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for (node = glob_hash_node; node && character >= node->character; node = node->next)
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{
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if (character == node->character)
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{
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len--;
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n = 0;
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if (len > 0)
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{
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n = _xdg_glob_hash_node_lookup_file_name (node->child,
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file_name,
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len,
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case_sensitive_check,
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mime_types,
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n_mime_types);
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}
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if (n == 0)
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{
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if (node->mime_type &&
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(case_sensitive_check ||
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!node->case_sensitive))
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{
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mime_types[n].mime = node->mime_type;
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mime_types[n].weight = node->weight;
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n++;
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}
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node = node->child;
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while (n < n_mime_types && node && node->character == 0)
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{
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if (node->mime_type &&
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(case_sensitive_check ||
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!node->case_sensitive))
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{
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mime_types[n].mime = node->mime_type;
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mime_types[n].weight = node->weight;
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n++;
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}
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node = node->next;
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}
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}
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return n;
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}
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}
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return 0;
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}
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static int compare_mime_weight (const void *a, const void *b)
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{
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const MimeWeight *aa = (const MimeWeight *)a;
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const MimeWeight *bb = (const MimeWeight *)b;
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return bb->weight - aa->weight;
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}
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#define ISUPPER(c) ((c) >= 'A' && (c) <= 'Z')
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static char *
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ascii_tolower (const char *str)
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{
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char *p, *lower;
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lower = strdup (str);
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p = lower;
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while (*p != 0)
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{
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char c = *p;
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*p++ = ISUPPER (c) ? c - 'A' + 'a' : c;
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}
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return lower;
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}
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static int
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filter_out_dupes (MimeWeight mimes[], int n_mimes)
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{
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int last;
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int i, j;
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last = n_mimes;
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for (i = 0; i < last; i++)
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{
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j = i + 1;
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while (j < last)
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{
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if (strcmp (mimes[i].mime, mimes[j].mime) == 0)
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{
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mimes[i].weight = MAX (mimes[i].weight, mimes[j].weight);
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last--;
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mimes[j].mime = mimes[last].mime;
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mimes[j].weight = mimes[last].weight;
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}
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else
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j++;
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}
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}
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return last;
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}
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int
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_xdg_glob_hash_lookup_file_name (XdgGlobHash *glob_hash,
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const char *file_name,
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const char *mime_types[],
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int n_mime_types)
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{
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XdgGlobList *list;
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int i, n;
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MimeWeight mimes[10];
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int n_mimes = 10;
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int len;
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char *lower_case;
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/* First, check the literals */
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assert (file_name != NULL && n_mime_types > 0);
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n = 0;
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lower_case = ascii_tolower (file_name);
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for (list = glob_hash->literal_list; list; list = list->next)
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{
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if (strcmp ((const char *)list->data, file_name) == 0)
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{
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mime_types[0] = list->mime_type;
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free (lower_case);
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return 1;
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}
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}
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for (list = glob_hash->literal_list; list; list = list->next)
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{
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if (!list->case_sensitive &&
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strcmp ((const char *)list->data, lower_case) == 0)
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{
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mime_types[0] = list->mime_type;
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free (lower_case);
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return 1;
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}
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}
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len = strlen (file_name);
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n = _xdg_glob_hash_node_lookup_file_name (glob_hash->simple_node, lower_case, len, FALSE,
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mimes, n_mimes);
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if (n < 2)
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n += _xdg_glob_hash_node_lookup_file_name (glob_hash->simple_node, file_name, len, TRUE,
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mimes + n, n_mimes - n);
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if (n < 2)
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{
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for (list = glob_hash->full_list; list && n < n_mime_types; list = list->next)
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{
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if (fnmatch ((const char *)list->data, file_name, 0) == 0)
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{
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mimes[n].mime = list->mime_type;
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mimes[n].weight = list->weight;
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n++;
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}
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}
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}
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free (lower_case);
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n = filter_out_dupes (mimes, n);
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qsort (mimes, n, sizeof (MimeWeight), compare_mime_weight);
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if (n_mime_types < n)
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n = n_mime_types;
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for (i = 0; i < n; i++)
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mime_types[i] = mimes[i].mime;
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return n;
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}
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/* XdgGlobHash
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*/
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XdgGlobHash *
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_xdg_glob_hash_new (void)
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{
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XdgGlobHash *glob_hash;
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glob_hash = calloc (1, sizeof (XdgGlobHash));
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return glob_hash;
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}
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static void
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_xdg_glob_hash_free_nodes (XdgGlobHashNode *node)
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{
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if (node)
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{
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if (node->child)
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_xdg_glob_hash_free_nodes (node->child);
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if (node->next)
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_xdg_glob_hash_free_nodes (node->next);
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if (node->mime_type)
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free ((void *) node->mime_type);
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free (node);
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}
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}
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void
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_xdg_glob_hash_free (XdgGlobHash *glob_hash)
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{
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_xdg_glob_list_free (glob_hash->literal_list);
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_xdg_glob_list_free (glob_hash->full_list);
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_xdg_glob_hash_free_nodes (glob_hash->simple_node);
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free (glob_hash);
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}
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XdgGlobType
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_xdg_glob_determine_type (const char *glob)
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{
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const char *ptr;
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int maybe_in_simple_glob = FALSE;
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int first_char = TRUE;
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ptr = glob;
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while (*ptr != '\0')
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{
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if (*ptr == '*' && first_char)
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maybe_in_simple_glob = TRUE;
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else if (*ptr == '\\' || *ptr == '[' || *ptr == '?' || *ptr == '*')
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return XDG_GLOB_FULL;
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first_char = FALSE;
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ptr = _xdg_utf8_next_char (ptr);
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}
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if (maybe_in_simple_glob)
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return XDG_GLOB_SIMPLE;
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else
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return XDG_GLOB_LITERAL;
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}
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/* glob must be valid UTF-8 */
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void
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_xdg_glob_hash_append_glob (XdgGlobHash *glob_hash,
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const char *glob,
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const char *mime_type,
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int weight,
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int case_sensitive)
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{
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XdgGlobType type;
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assert (glob_hash != NULL);
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assert (glob != NULL);
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type = _xdg_glob_determine_type (glob);
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switch (type)
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{
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case XDG_GLOB_LITERAL:
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glob_hash->literal_list = _xdg_glob_list_append (glob_hash->literal_list, strdup (glob), strdup (mime_type), weight, case_sensitive);
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break;
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case XDG_GLOB_SIMPLE:
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glob_hash->simple_node = _xdg_glob_hash_insert_text (glob_hash->simple_node, glob + 1, mime_type, weight, case_sensitive);
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break;
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case XDG_GLOB_FULL:
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glob_hash->full_list = _xdg_glob_list_append (glob_hash->full_list, strdup (glob), strdup (mime_type), weight, case_sensitive);
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break;
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}
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}
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#ifdef NOT_USED_IN_GIO
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void
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_xdg_glob_hash_dump (XdgGlobHash *glob_hash)
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{
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XdgGlobList *list;
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printf ("LITERAL STRINGS\n");
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if (!glob_hash || glob_hash->literal_list == NULL)
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{
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printf (" None\n");
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}
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else
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{
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for (list = glob_hash->literal_list; list; list = list->next)
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printf (" %s - %s %d\n", (char *)list->data, list->mime_type, list->weight);
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}
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printf ("\nSIMPLE GLOBS\n");
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if (!glob_hash || glob_hash->simple_node == NULL)
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{
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printf (" None\n");
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}
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else
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{
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_xdg_glob_hash_node_dump (glob_hash->simple_node, 4);
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}
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printf ("\nFULL GLOBS\n");
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if (!glob_hash || glob_hash->full_list == NULL)
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{
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printf (" None\n");
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}
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else
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{
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for (list = glob_hash->full_list; list; list = list->next)
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printf (" %s - %s %d\n", (char *)list->data, list->mime_type, list->weight);
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}
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}
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#endif
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void
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_xdg_mime_glob_read_from_file (XdgGlobHash *glob_hash,
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const char *file_name,
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int version_two)
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{
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FILE *glob_file;
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char line[255];
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char *p;
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glob_file = fopen (file_name, "r");
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if (glob_file == NULL)
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return;
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/* FIXME: Not UTF-8 safe. Doesn't work if lines are greater than 255 chars.
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* Blah */
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while (fgets (line, 255, glob_file) != NULL)
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{
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char *colon;
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char *mimetype, *glob, *end;
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int weight;
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int case_sensitive;
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if (line[0] == '#' || line[0] == 0)
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continue;
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end = line + strlen(line) - 1;
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if (*end == '\n')
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*end = 0;
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p = line;
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if (version_two)
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{
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colon = strchr (p, ':');
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if (colon == NULL)
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continue;
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*colon = 0;
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weight = atoi (p);
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p = colon + 1;
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}
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else
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weight = 50;
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colon = strchr (p, ':');
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if (colon == NULL)
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continue;
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*colon = 0;
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mimetype = p;
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p = colon + 1;
|
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glob = p;
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case_sensitive = FALSE;
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|
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colon = strchr (p, ':');
|
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if (version_two && colon != NULL)
|
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{
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char *flag;
|
|
|
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/* We got flags */
|
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*colon = 0;
|
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p = colon + 1;
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|
|
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/* Flags end at next colon */
|
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colon = strchr (p, ':');
|
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if (colon != NULL)
|
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*colon = 0;
|
|
|
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flag = strstr (p, "cs");
|
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if (flag != NULL &&
|
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/* Start or after comma */
|
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(flag == p ||
|
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flag[-1] == ',') &&
|
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/* ends with comma or end of string */
|
|
(flag[2] == 0 ||
|
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flag[2] == ','))
|
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case_sensitive = TRUE;
|
|
}
|
|
|
|
_xdg_glob_hash_append_glob (glob_hash, glob, mimetype, weight, case_sensitive);
|
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}
|
|
|
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fclose (glob_file);
|
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}
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