/* -*- mode: C; c-file-style: "gnu" -*- */
/* xdgmimeglob.c: Private file. Datastructure for storing the globs.
*
* More info can be found at http://www.freedesktop.org/standards/
*
* Copyright (C) 2003 Red Hat, Inc.
* Copyright (C) 2003 Jonathan Blandford <jrb@alum.mit.edu>
*
* Licensed under the Academic Free License version 2.0
* Or under the following terms:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "xdgmimeglob.h"
#include "xdgmimeint.h"
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <fnmatch.h>
#include <ctype.h>
#ifndef FALSE
#define FALSE (0)
#endif
#ifndef TRUE
#define TRUE (!FALSE)
#endif
typedef struct XdgGlobHashNode XdgGlobHashNode;
typedef struct XdgGlobList XdgGlobList;
struct XdgGlobHashNode
{
xdg_unichar_t character;
const char *mime_type;
int weight;
XdgGlobHashNode *next;
XdgGlobHashNode *child;
};
struct XdgGlobList
{
const char *data;
const char *mime_type;
int weight;
XdgGlobList *next;
};
struct XdgGlobHash
{
XdgGlobList *literal_list;
XdgGlobHashNode *simple_node;
XdgGlobList *full_list;
};
/* XdgGlobList
*/
static XdgGlobList *
_xdg_glob_list_new (void)
{
XdgGlobList *new_element;
new_element = calloc (1, sizeof (XdgGlobList));
return new_element;
}
/* Frees glob_list and all of it's children */
static void
_xdg_glob_list_free (XdgGlobList *glob_list)
{
XdgGlobList *ptr, *next;
ptr = glob_list;
while (ptr != NULL)
{
next = ptr->next;
if (ptr->data)
free ((void *) ptr->data);
if (ptr->mime_type)
free ((void *) ptr->mime_type);
free (ptr);
ptr = next;
}
}
static XdgGlobList *
_xdg_glob_list_append (XdgGlobList *glob_list,
void *data,
const char *mime_type,
int weight)
{
XdgGlobList *new_element;
XdgGlobList *tmp_element;
new_element = _xdg_glob_list_new ();
new_element->data = data;
new_element->mime_type = mime_type;
new_element->weight = weight;
if (glob_list == NULL)
return new_element;
tmp_element = glob_list;
while (tmp_element->next != NULL)
tmp_element = tmp_element->next;
tmp_element->next = new_element;
return glob_list;
}
/* XdgGlobHashNode
*/
static XdgGlobHashNode *
_xdg_glob_hash_node_new (void)
{
XdgGlobHashNode *glob_hash_node;
glob_hash_node = calloc (1, sizeof (XdgGlobHashNode));
return glob_hash_node;
}
static void
_xdg_glob_hash_node_dump (XdgGlobHashNode *glob_hash_node,
int depth)
{
int i;
for (i = 0; i < depth; i++)
printf (" ");
printf ("%c", (char)glob_hash_node->character);
if (glob_hash_node->mime_type)
printf (" - %s %d\n", glob_hash_node->mime_type, glob_hash_node->weight);
else
printf ("\n");
if (glob_hash_node->child)
_xdg_glob_hash_node_dump (glob_hash_node->child, depth + 1);
if (glob_hash_node->next)
_xdg_glob_hash_node_dump (glob_hash_node->next, depth);
}
static XdgGlobHashNode *
_xdg_glob_hash_insert_ucs4 (XdgGlobHashNode *glob_hash_node,
xdg_unichar_t *text,
const char *mime_type,
int weight)
{
XdgGlobHashNode *node;
xdg_unichar_t character;
character = text[0];
if ((glob_hash_node == NULL) ||
(character < glob_hash_node->character))
{
node = _xdg_glob_hash_node_new ();
node->character = character;
node->next = glob_hash_node;
glob_hash_node = node;
}
else if (character == glob_hash_node->character)
{
node = glob_hash_node;
}
else
{
XdgGlobHashNode *prev_node;
int found_node = FALSE;
/* Look for the first character of text in glob_hash_node, and insert it if we
* have to.*/
prev_node = glob_hash_node;
node = prev_node->next;
while (node != NULL)
{
if (character < node->character)
{
node = _xdg_glob_hash_node_new ();
node->character = character;
node->next = prev_node->next;
prev_node->next = node;
found_node = TRUE;
break;
}
else if (character == node->character)
{
found_node = TRUE;
break;
}
prev_node = node;
node = node->next;
}
if (! found_node)
{
node = _xdg_glob_hash_node_new ();
node->character = character;
node->next = prev_node->next;
prev_node->next = node;
}
}
text++;
if (*text == 0)
{
if (node->mime_type)
{
if (strcmp (node->mime_type, mime_type))
{
XdgGlobHashNode *child;
int found_node = FALSE;
child = node->child;
while (child && child->character == 0)
{
if (strcmp (child->mime_type, mime_type) == 0)
{
found_node = TRUE;
break;
}
child = child->next;
}
if (!found_node)
{
child = _xdg_glob_hash_node_new ();
child->character = 0;
child->mime_type = strdup (mime_type);
child->weight = weight;
child->child = NULL;
child->next = node->child;
node->child = child;
}
}
}
else
{
node->mime_type = strdup (mime_type);
node->weight = weight;
}
}
else
{
node->child = _xdg_glob_hash_insert_ucs4 (node->child, text, mime_type, weight);
}
return glob_hash_node;
}
/* glob must be valid UTF-8 */
static XdgGlobHashNode *
_xdg_glob_hash_insert_text (XdgGlobHashNode *glob_hash_node,
const char *text,
const char *mime_type,
int weight)
{
XdgGlobHashNode *node;
xdg_unichar_t *unitext;
int len;
unitext = _xdg_convert_to_ucs4 (text, &len);
_xdg_reverse_ucs4 (unitext, len);
node = _xdg_glob_hash_insert_ucs4 (glob_hash_node, unitext, mime_type, weight);
free (unitext);
return node;
}
typedef struct {
const char *mime;
int weight;
} MimeWeight;
static int
_xdg_glob_hash_node_lookup_file_name (XdgGlobHashNode *glob_hash_node,
const char *file_name,
int len,
int ignore_case,
MimeWeight mime_types[],
int n_mime_types)
{
int n;
XdgGlobHashNode *node;
xdg_unichar_t character;
if (glob_hash_node == NULL)
return 0;
character = file_name[len - 1];
if (ignore_case)
character = tolower(character);
for (node = glob_hash_node; node && character >= node->character; node = node->next)
{
if (character == node->character)
{
len--;
n = 0;
if (len > 0)
{
n = _xdg_glob_hash_node_lookup_file_name (node->child,
file_name,
len,
ignore_case,
mime_types,
n_mime_types);
}
if (n == 0)
{
if (node->mime_type)
{
mime_types[n].mime = node->mime_type;
mime_types[n].weight = node->weight;
n++;
}
node = node->child;
while (n < n_mime_types && node && node->character == 0)
{
if (node->mime_type)
{
mime_types[n].mime = node->mime_type;
mime_types[n].weight = node->weight;
n++;
}
node = node->next;
}
}
return n;
}
}
return 0;
}
static int compare_mime_weight (const void *a, const void *b)
{
const MimeWeight *aa = (const MimeWeight *)a;
const MimeWeight *bb = (const MimeWeight *)b;
return aa->weight - bb->weight;
}
int
_xdg_glob_hash_lookup_file_name (XdgGlobHash *glob_hash,
const char *file_name,
const char *mime_types[],
int n_mime_types)
{
XdgGlobList *list;
int i, n;
MimeWeight mimes[10];
int n_mimes = 10;
xdg_unichar_t *ucs4;
int len;
/* First, check the literals */
assert (file_name != NULL && n_mime_types > 0);
n = 0;
for (list = glob_hash->literal_list; list; list = list->next)
{
if (strcmp ((const char *)list->data, file_name) == 0)
{
mime_types[0] = list->mime_type;
return 1;
}
}
len = strlen (file_name);
n = _xdg_glob_hash_node_lookup_file_name (glob_hash->simple_node, file_name, len, FALSE,
mimes, n_mimes);
if (n == 0)
n = _xdg_glob_hash_node_lookup_file_name (glob_hash->simple_node, file_name, len, TRUE,
mimes, n_mimes);
if (n == 0)
{
for (list = glob_hash->full_list; list && n < n_mime_types; list = list->next)
{
if (fnmatch ((const char *)list->data, file_name, 0) == 0)
{
mimes[n].mime = list->mime_type;
mimes[n].weight = list->weight;
n++;
}
}
}
qsort (mimes, n, sizeof (MimeWeight), compare_mime_weight);
if (n_mime_types < n)
n = n_mime_types;
for (i = 0; i < n; i++)
mime_types[i] = mimes[i].mime;
return n;
}
/* XdgGlobHash
*/
XdgGlobHash *
_xdg_glob_hash_new (void)
{
XdgGlobHash *glob_hash;
glob_hash = calloc (1, sizeof (XdgGlobHash));
return glob_hash;
}
static void
_xdg_glob_hash_free_nodes (XdgGlobHashNode *node)
{
if (node)
{
if (node->child)
_xdg_glob_hash_free_nodes (node->child);
if (node->next)
_xdg_glob_hash_free_nodes (node->next);
if (node->mime_type)
free ((void *) node->mime_type);
free (node);
}
}
void
_xdg_glob_hash_free (XdgGlobHash *glob_hash)
{
_xdg_glob_list_free (glob_hash->literal_list);
_xdg_glob_list_free (glob_hash->full_list);
_xdg_glob_hash_free_nodes (glob_hash->simple_node);
free (glob_hash);
}
XdgGlobType
_xdg_glob_determine_type (const char *glob)
{
const char *ptr;
int maybe_in_simple_glob = FALSE;
int first_char = TRUE;
ptr = glob;
while (*ptr != '\0')
{
if (*ptr == '*' && first_char)
maybe_in_simple_glob = TRUE;
else if (*ptr == '\\' || *ptr == '[' || *ptr == '?' || *ptr == '*')
return XDG_GLOB_FULL;
first_char = FALSE;
ptr = _xdg_utf8_next_char (ptr);
}
if (maybe_in_simple_glob)
return XDG_GLOB_SIMPLE;
else
return XDG_GLOB_LITERAL;
}
/* glob must be valid UTF-8 */
void
_xdg_glob_hash_append_glob (XdgGlobHash *glob_hash,
const char *glob,
const char *mime_type,
int weight)
{
XdgGlobType type;
assert (glob_hash != NULL);
assert (glob != NULL);
type = _xdg_glob_determine_type (glob);
switch (type)
{
case XDG_GLOB_LITERAL:
glob_hash->literal_list = _xdg_glob_list_append (glob_hash->literal_list, strdup (glob), strdup (mime_type), weight);
break;
case XDG_GLOB_SIMPLE:
glob_hash->simple_node = _xdg_glob_hash_insert_text (glob_hash->simple_node, glob + 1, mime_type, weight);
break;
case XDG_GLOB_FULL:
glob_hash->full_list = _xdg_glob_list_append (glob_hash->full_list, strdup (glob), strdup (mime_type), weight);
break;
}
}
void
_xdg_glob_hash_dump (XdgGlobHash *glob_hash)
{
XdgGlobList *list;
printf ("LITERAL STRINGS\n");
if (!glob_hash || glob_hash->literal_list == NULL)
{
printf (" None\n");
}
else
{
for (list = glob_hash->literal_list; list; list = list->next)
printf (" %s - %s %d\n", (char *)list->data, list->mime_type, list->weight);
}
printf ("\nSIMPLE GLOBS\n");
if (!glob_hash || glob_hash->simple_node == NULL)
{
printf (" None\n");
}
else
{
_xdg_glob_hash_node_dump (glob_hash->simple_node, 4);
}
printf ("\nFULL GLOBS\n");
if (!glob_hash || glob_hash->full_list == NULL)
{
printf (" None\n");
}
else
{
for (list = glob_hash->full_list; list; list = list->next)
printf (" %s - %s %d\n", (char *)list->data, list->mime_type, list->weight);
}
}
void
_xdg_mime_glob_read_from_file (XdgGlobHash *glob_hash,
const char *file_name)
{
FILE *glob_file;
char line[255];
glob_file = fopen (file_name, "r");
if (glob_file == NULL)
return;
/* FIXME: Not UTF-8 safe. Doesn't work if lines are greater than 255 chars.
* Blah */
while (fgets (line, 255, glob_file) != NULL)
{
char *colon, *colon2;
char *mimetype, *glob;
int weight;
if (line[0] == '#')
continue;
colon = strchr (line, ':');
if (colon == NULL)
continue;
*(colon++) = '\0';
colon[strlen (colon) -1] = '\0';
colon2 = strchr (colon, ':');
if (colon2)
{
*(colon2++) = '\000';
weight = atoi (line);
mimetype = colon;
glob = colon2;
}
else
{
weight = 50;
mimetype = line;
glob = colon;
}
_xdg_glob_hash_append_glob (glob_hash, glob, mimetype, weight);
}
fclose (glob_file);
}