gio/xdgmime/xdgmimealias.c

   1 /* -*- mode: C; c-file-style: "gnu" -*- */
   2 /* xdgmimealias.c: Private file.  Datastructure for storing the aliases.
   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 "xdgmimealias.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 XdgAlias XdgAlias;
  45
  46 struct XdgAlias
  47 {
  48   char *alias;
  49   char *mime_type;
  50 };
  51
  52 struct XdgAliasList
  53 {
  54   struct XdgAlias *aliases;
  55   int n_aliases;
  56 };
  57
  58 XdgAliasList *
  59 _xdg_mime_alias_list_new (void)
  60 {
  61   XdgAliasList *list;
  62
  63   list = malloc (sizeof (XdgAliasList));
  64
  65   list->aliases = NULL;
  66   list->n_aliases = 0;
  67
  68   return list;
  69 }
  70
  71 void
  72 _xdg_mime_alias_list_free (XdgAliasList *list)
  73 {
  74   int i;
  75
  76   if (list->aliases)
  77     {
  78       for (i = 0; i < list->n_aliases; i++)
  79         {
  80           free (list->aliases[i].alias);
  81           free (list->aliases[i].mime_type);
  82         }
  83       free (list->aliases);
  84     }
  85   free (list);
  86 }
  87
  88 static int
  89 alias_entry_cmp (const void *v1, const void *v2)
  90 {
  91   return strcmp (((XdgAlias *)v1)->alias, ((XdgAlias *)v2)->alias);
  92 }
  93
  94 const char  *
  95 _xdg_mime_alias_list_lookup (XdgAliasList *list,
  96                              const char   *alias)
  97 {
  98   XdgAlias *entry;
  99   XdgAlias key;
 100
 101   if (list->n_aliases > 0)
 102     {
 103       key.alias = (char *)alias;
 104       key.mime_type = NULL;
 105
 106       entry = bsearch (&key, list->aliases, list->n_aliases,
 107                        sizeof (XdgAlias), alias_entry_cmp);
 108       if (entry)
 109         return entry->mime_type;
 110     }
 111
 112   return NULL;
 113 }
 114
 115 void
 116 _xdg_mime_alias_read_from_file (XdgAliasList *list,
 117                                 const char   *file_name)
 118 {
 119   FILE *file;
 120   char line[255];
 121   int alloc;
 122
 123   file = fopen (file_name, "r");
 124
 125   if (file == NULL)
 126     return;
 127
 128   /* FIXME: Not UTF-8 safe.  Doesn't work if lines are greater than 255 chars.
 129    * Blah */
 130   alloc = list->n_aliases + 16;
 131   list->aliases = realloc (list->aliases, alloc * sizeof (XdgAlias));
 132   while (fgets (line, 255, file) != NULL)
 133     {
 134       char *sep;
 135       if (line[0] == '#')
 136         continue;
 137
 138       sep = strchr (line, ' ');
 139       if (sep == NULL)
 140         continue;
 141       *(sep++) = '\000';
 142       sep[strlen (sep) -1] = '\000';
 143       if (list->n_aliases == alloc)
 144         {
 145           alloc <<= 1;
 146           list->aliases = realloc (list->aliases,
 147                                    alloc * sizeof (XdgAlias));
 148         }
 149       list->aliases[list->n_aliases].alias = strdup (line);
 150       list->aliases[list->n_aliases].mime_type = strdup (sep);
 151       list->n_aliases++;
 152     }
 153   list->aliases = realloc (list->aliases,
 154                            list->n_aliases * sizeof (XdgAlias));
 155
 156   fclose (file);
 157
 158   if (list->n_aliases > 1)
 159     qsort (list->aliases, list->n_aliases,
 160            sizeof (XdgAlias), alias_entry_cmp);
 161 }
 162
 163
 164 #ifdef NOT_USED_IN_GIO
 165
 166 void
 167 _xdg_mime_alias_list_dump (XdgAliasList *list)
 168 {
 169   int i;
 170
 171   if (list->aliases)
 172     {
 173       for (i = 0; i < list->n_aliases; i++)
 174         {
 175           printf ("%s %s\n",
 176                   list->aliases[i].alias,
 177                   list->aliases[i].mime_type);
 178         }
 179     }
 180 }
 181
 182 #endif