base/third_party/xdg_mime/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 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, write to the
  24  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25  * Boston, MA 02111-1307, USA.
  26  */
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31
  32 #include "xdgmimealias.h"
  33 #include "xdgmimeint.h"
  34 #include <stdlib.h>
  35 #include <stdio.h>
  36 #include <assert.h>
  37 #include <string.h>
  38 #include <fnmatch.h>
  39
  40 #ifndef FALSE
  41 #define FALSE   (0)
  42 #endif
  43
  44 #ifndef TRUE
  45 #define TRUE    (!FALSE)
  46 #endif
  47
  48 typedef struct XdgAlias XdgAlias;
  49
  50 struct XdgAlias
  51 {
  52   char *alias;
  53   char *mime_type;
  54 };
  55
  56 struct XdgAliasList
  57 {
  58   struct XdgAlias *aliases;
  59   int n_aliases;
  60 };
  61
  62 XdgAliasList *
  63 _xdg_mime_alias_list_new (void)
  64 {
  65   XdgAliasList *list;
  66
  67   list = malloc (sizeof (XdgAliasList));
  68
  69   list->aliases = NULL;
  70   list->n_aliases = 0;
  71
  72   return list;
  73 }
  74
  75 void
  76 _xdg_mime_alias_list_free (XdgAliasList *list)
  77 {
  78   int i;
  79
  80   if (list->aliases)
  81     {
  82       for (i = 0; i < list->n_aliases; i++)
  83         {
  84           free (list->aliases[i].alias);
  85           free (list->aliases[i].mime_type);
  86         }
  87       free (list->aliases);
  88     }
  89   free (list);
  90 }
  91
  92 static int
  93 alias_entry_cmp (const void *v1, const void *v2)
  94 {
  95   return strcmp (((XdgAlias *)v1)->alias, ((XdgAlias *)v2)->alias);
  96 }
  97
  98 const char  *
  99 _xdg_mime_alias_list_lookup (XdgAliasList *list,
 100                              const char   *alias)
 101 {
 102   XdgAlias *entry;
 103   XdgAlias key;
 104
 105   if (list->n_aliases > 0)
 106     {
 107       key.alias = (char *)alias;
 108       key.mime_type = NULL;
 109
 110       entry = bsearch (&key, list->aliases, list->n_aliases,
 111                        sizeof (XdgAlias), alias_entry_cmp);
 112       if (entry)
 113         return entry->mime_type;
 114     }
 115
 116   return NULL;
 117 }
 118
 119 void
 120 _xdg_mime_alias_read_from_file (XdgAliasList *list,
 121                                 const char   *file_name)
 122 {
 123   FILE *file;
 124   char line[255];
 125   int alloc;
 126
 127   file = fopen (file_name, "r");
 128
 129   if (file == NULL)
 130     return;
 131
 132   /* FIXME: Not UTF-8 safe.  Doesn't work if lines are greater than 255 chars.
 133    * Blah */
 134   alloc = list->n_aliases + 16;
 135   list->aliases = realloc (list->aliases, alloc * sizeof (XdgAlias));
 136   while (fgets (line, 255, file) != NULL)
 137     {
 138       char *sep;
 139       if (line[0] == '#')
 140         continue;
 141
 142       sep = strchr (line, ' ');
 143       if (sep == NULL)
 144         continue;
 145       *(sep++) = '\000';
 146       sep[strlen (sep) -1] = '\000';
 147       if (list->n_aliases == alloc)
 148         {
 149           alloc <<= 1;
 150           list->aliases = realloc (list->aliases,
 151                                    alloc * sizeof (XdgAlias));
 152         }
 153       list->aliases[list->n_aliases].alias = strdup (line);
 154       list->aliases[list->n_aliases].mime_type = strdup (sep);
 155       list->n_aliases++;
 156     }
 157   list->aliases = realloc (list->aliases,
 158                            list->n_aliases * sizeof (XdgAlias));
 159
 160   fclose (file);
 161
 162   if (list->n_aliases > 1)
 163     qsort (list->aliases, list->n_aliases,
 164            sizeof (XdgAlias), alias_entry_cmp);
 165 }
 166
 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