gio/xdgmime/xdgmimeparent.c

   1 /* -*- mode: C; c-file-style: "gnu" -*- */
   2 /* xdgmimealias.c: Private file.  Datastructure for storing the hierarchy.
   3  *
   4  * More info can be found at http://www.freedesktop.org/standards/
   5  *
   6  * Copyright (C) 2004  Red Hat, Inc.
   7  * Copyright (C) 2004  Matthias Clasen <mclasen@redhat.com>
   8  *
   9  * Licensed under the Academic Free License version 2.0
  10  * Or under the following terms:
  11  *
  12  * This library is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU Lesser General Public
  14  * License as published by the Free Software Foundation; either
  15  * version 2.1 of the License, or (at your option) any later version.
  16  *
  17  * This library is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public
  23  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  24  */
  25
  26 #include "config.h"
  27
  28 #include "xdgmimeparent.h"
  29 #include "xdgmimeint.h"
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <assert.h>
  33 #include <string.h>
  34 #include <fnmatch.h>
  35
  36 #ifndef FALSE
  37 #define FALSE   (0)
  38 #endif
  39
  40 #ifndef TRUE
  41 #define TRUE    (!FALSE)
  42 #endif
  43
  44 typedef struct XdgMimeParents XdgMimeParents;
  45
  46 struct XdgMimeParents
  47 {
  48   char *mime;
  49   char **parents;
  50   int n_parents;
  51 };
  52
  53 struct XdgParentList
  54 {
  55   struct XdgMimeParents *parents;
  56   int n_mimes;
  57 };
  58
  59 XdgParentList *
  60 _xdg_mime_parent_list_new (void)
  61 {
  62   XdgParentList *list;
  63
  64   list = malloc (sizeof (XdgParentList));
  65
  66   list->parents = NULL;
  67   list->n_mimes = 0;
  68
  69   return list;
  70 }
  71
  72 void
  73 _xdg_mime_parent_list_free (XdgParentList *list)
  74 {
  75   int i;
  76   char **p;
  77
  78   if (list->parents)
  79     {
  80       for (i = 0; i < list->n_mimes; i++)
  81         {
  82           for (p = list->parents[i].parents; *p; p++)
  83             free (*p);
  84
  85           free (list->parents[i].parents);
  86           free (list->parents[i].mime);
  87         }
  88       free (list->parents);
  89     }
  90   free (list);
  91 }
  92
  93 static int
  94 parent_entry_cmp (const void *v1, const void *v2)
  95 {
  96   return strcmp (((XdgMimeParents *)v1)->mime, ((XdgMimeParents *)v2)->mime);
  97 }
  98
  99 const char **
 100 _xdg_mime_parent_list_lookup (XdgParentList *list,
 101                               const char    *mime)
 102 {
 103   XdgMimeParents *entry;
 104   XdgMimeParents key;
 105
 106   if (list->n_mimes > 0)
 107     {
 108       key.mime = (char *)mime;
 109       key.parents = NULL;
 110       key.n_parents = 0;
 111
 112       entry = bsearch (&key, list->parents, list->n_mimes,
 113                        sizeof (XdgMimeParents), &parent_entry_cmp);
 114       if (entry)
 115         return (const char **)entry->parents;
 116     }
 117
 118   return NULL;
 119 }
 120
 121 void
 122 _xdg_mime_parent_read_from_file (XdgParentList *list,
 123                                  const char    *file_name)
 124 {
 125   FILE *file;
 126   char line[255];
 127   int i, alloc;
 128   XdgMimeParents *entry;
 129
 130   file = fopen (file_name, "r");
 131
 132   if (file == NULL)
 133     return;
 134
 135   /* FIXME: Not UTF-8 safe.  Doesn't work if lines are greater than 255 chars.
 136    * Blah */
 137   alloc = list->n_mimes + 16;
 138   list->parents = realloc (list->parents, alloc * sizeof (XdgMimeParents));
 139   while (fgets (line, 255, file) != NULL)
 140     {
 141       char *sep;
 142       if (line[0] == '#')
 143         continue;
 144
 145       sep = strchr (line, ' ');
 146       if (sep == NULL)
 147         continue;
 148       *(sep++) = '\000';
 149       sep[strlen (sep) -1] = '\000';
 150       entry = NULL;
 151       for (i = 0; i < list->n_mimes; i++)
 152         {
 153           if (strcmp (list->parents[i].mime, line) == 0)
 154             {
 155               entry = &(list->parents[i]);
 156               break;
 157             }
 158         }
 159
 160       if (!entry)
 161         {
 162           if (list->n_mimes == alloc)
 163             {
 164               alloc <<= 1;
 165               list->parents = realloc (list->parents,
 166                                        alloc * sizeof (XdgMimeParents));
 167             }
 168           list->parents[list->n_mimes].mime = strdup (line);
 169           list->parents[list->n_mimes].parents = NULL;
 170           entry = &(list->parents[list->n_mimes]);
 171           list->n_mimes++;
 172         }
 173
 174       if (!entry->parents)
 175         {
 176           entry->n_parents = 1;
 177           entry->parents = malloc ((entry->n_parents + 1) * sizeof (char *));
 178         }
 179       else
 180         {
 181           entry->n_parents += 1;
 182           entry->parents = realloc (entry->parents,
 183                                     (entry->n_parents + 2) * sizeof (char *));
 184         }
 185       entry->parents[entry->n_parents - 1] = strdup (sep);
 186       entry->parents[entry->n_parents] = NULL;
 187     }
 188
 189   list->parents = realloc (list->parents,
 190                            list->n_mimes * sizeof (XdgMimeParents));
 191
 192   fclose (file);
 193
 194   if (list->n_mimes > 1)
 195     qsort (list->parents, list->n_mimes,
 196            sizeof (XdgMimeParents), &parent_entry_cmp);
 197 }
 198
 199 #ifdef NOT_USED_IN_GIO
 200
 201 void
 202 _xdg_mime_parent_list_dump (XdgParentList *list)
 203 {
 204   int i;
 205   char **p;
 206
 207   if (list->parents)
 208     {
 209       for (i = 0; i < list->n_mimes; i++)
 210         {
 211           for (p = list->parents[i].parents; *p; p++)
 212             printf ("%s %s\n", list->parents[i].mime, *p);
 213         }
 214     }
 215 }
 216
 217 #endif
 218