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 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include "xdgmimealias.h"
  31 #include "xdgmimeint.h"
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #include <assert.h>
  35 #include <string.h>
  36 #include <fnmatch.h>
  37
  38 #ifndef FALSE
  39 #define FALSE   (0)
  40 #endif
  41
  42 #ifndef TRUE
  43 #define TRUE    (!FALSE)
  44 #endif
  45
  46 typedef struct XdgAlias XdgAlias;
  47
  48 struct XdgAlias
  49 {
  50   char *alias;
  51   char *mime_type;
  52 };
  53
  54 struct XdgAliasList
  55 {
  56   struct XdgAlias *aliases;
  57   int n_aliases;
  58 };
  59
  60 XdgAliasList *
  61 _xdg_mime_alias_list_new (void)
  62 {
  63   XdgAliasList *list;
  64
  65   list = malloc (sizeof (XdgAliasList));
  66
  67   list->aliases = NULL;
  68   list->n_aliases = 0;
  69
  70   return list;
  71 }
  72
  73 void
  74 _xdg_mime_alias_list_free (XdgAliasList *list)
  75 {
  76   int i;
  77
  78   if (list->aliases)
  79     {
  80       for (i = 0; i < list->n_aliases; i++)
  81         {
  82           free (list->aliases[i].alias);
  83           free (list->aliases[i].mime_type);
  84         }
  85       free (list->aliases);
  86     }
  87   free (list);
  88 }
  89
  90 static int
  91 alias_entry_cmp (const void *v1, const void *v2)
  92 {
  93   return strcmp (((XdgAlias *)v1)->alias, ((XdgAlias *)v2)->alias);
  94 }
  95
  96 const char  *
  97 _xdg_mime_alias_list_lookup (XdgAliasList *list,
  98                              const char   *alias)
  99 {
 100   XdgAlias *entry;
 101   XdgAlias key;
 102
 103   if (list->n_aliases > 0)
 104     {
 105       key.alias = (char *)alias;
 106       key.mime_type = NULL;
 107
 108       entry = bsearch (&key, list->aliases, list->n_aliases,
 109                        sizeof (XdgAlias), alias_entry_cmp);
 110       if (entry)
 111         return entry->mime_type;
 112     }
 113
 114   return NULL;
 115 }
 116
 117 void
 118 _xdg_mime_alias_read_from_file (XdgAliasList *list,
 119                                 const char   *file_name)
 120 {
 121   FILE *file;
 122   char line[255];
 123   int alloc;
 124
 125   file = fopen (file_name, "r");
 126
 127   if (file == NULL)
 128     return;
 129
 130   /* FIXME: Not UTF-8 safe.  Doesn't work if lines are greater than 255 chars.
 131    * Blah */
 132   alloc = list->n_aliases + 16;
 133   list->aliases = realloc (list->aliases, alloc * sizeof (XdgAlias));
 134   while (fgets (line, 255, file) != NULL)
 135     {
 136       char *sep;
 137       if (line[0] == '#')
 138         continue;
 139
 140       sep = strchr (line, ' ');
 141       if (sep == NULL)
 142         continue;
 143       *(sep++) = '\000';
 144       sep[strlen (sep) -1] = '\000';
 145       if (list->n_aliases == alloc)
 146         {
 147           alloc <<= 1;
 148           list->aliases = realloc (list->aliases,
 149                                    alloc * sizeof (XdgAlias));
 150         }
 151       list->aliases[list->n_aliases].alias = strdup (line);
 152       list->aliases[list->n_aliases].mime_type = strdup (sep);
 153       list->n_aliases++;
 154     }
 155   list->aliases = realloc (list->aliases,
 156                            list->n_aliases * sizeof (XdgAlias));
 157
 158   fclose (file);
 159
 160   if (list->n_aliases > 1)
 161     qsort (list->aliases, list->n_aliases,
 162            sizeof (XdgAlias), alias_entry_cmp);
 163 }
 164
 165
 166 #ifdef NOT_USED_IN_GIO
 167
 168 void
 169 _xdg_mime_alias_list_dump (XdgAliasList *list)
 170 {
 171   int i;
 172
 173   if (list->aliases)
 174     {
 175       for (i = 0; i < list->n_aliases; i++)
 176         {
 177           printf ("%s %s\n",
 178                   list->aliases[i].alias,
 179                   list->aliases[i].mime_type);
 180         }
 181     }
 182 }
 183
 184 #endif