base/third_party/xdg_mime/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 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 "xdgmimeparent.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 XdgMimeParents XdgMimeParents;
  49
  50 struct XdgMimeParents
  51 {
  52   char *mime;
  53   char **parents;
  54   int n_parents;
  55 };
  56
  57 struct XdgParentList
  58 {
  59   struct XdgMimeParents *parents;
  60   int n_mimes;
  61 };
  62
  63 XdgParentList *
  64 _xdg_mime_parent_list_new (void)
  65 {
  66   XdgParentList *list;
  67
  68   list = malloc (sizeof (XdgParentList));
  69
  70   list->parents = NULL;
  71   list->n_mimes = 0;
  72
  73   return list;
  74 }
  75
  76 void
  77 _xdg_mime_parent_list_free (XdgParentList *list)
  78 {
  79   int i;
  80   char **p;
  81
  82   if (list->parents)
  83     {
  84       for (i = 0; i < list->n_mimes; i++)
  85         {
  86           for (p = list->parents[i].parents; *p; p++)
  87             free (*p);
  88
  89           free (list->parents[i].parents);
  90           free (list->parents[i].mime);
  91         }
  92       free (list->parents);
  93     }
  94   free (list);
  95 }
  96
  97 static int
  98 parent_entry_cmp (const void *v1, const void *v2)
  99 {
 100   return strcmp (((XdgMimeParents *)v1)->mime, ((XdgMimeParents *)v2)->mime);
 101 }
 102
 103 const char **
 104 _xdg_mime_parent_list_lookup (XdgParentList *list,
 105                               const char    *mime)
 106 {
 107   XdgMimeParents *entry;
 108   XdgMimeParents key;
 109
 110   if (list->n_mimes > 0)
 111     {
 112       key.mime = (char *)mime;
 113       key.parents = NULL;
 114
 115       entry = bsearch (&key, list->parents, list->n_mimes,
 116                        sizeof (XdgMimeParents), &parent_entry_cmp);
 117       if (entry)
 118         return (const char **)entry->parents;
 119     }
 120
 121   return NULL;
 122 }
 123
 124 void
 125 _xdg_mime_parent_read_from_file (XdgParentList *list,
 126                                  const char    *file_name)
 127 {
 128   FILE *file;
 129   char line[255];
 130   int i, alloc;
 131   XdgMimeParents *entry;
 132
 133   file = fopen (file_name, "r");
 134
 135   if (file == NULL)
 136     return;
 137
 138   /* FIXME: Not UTF-8 safe.  Doesn't work if lines are greater than 255 chars.
 139    * Blah */
 140   alloc = list->n_mimes + 16;
 141   list->parents = realloc (list->parents, alloc * sizeof (XdgMimeParents));
 142   while (fgets (line, 255, file) != NULL)
 143     {
 144       char *sep;
 145       if (line[0] == '#')
 146         continue;
 147
 148       sep = strchr (line, ' ');
 149       if (sep == NULL)
 150         continue;
 151       *(sep++) = '\000';
 152       sep[strlen (sep) -1] = '\000';
 153       entry = NULL;
 154       for (i = 0; i < list->n_mimes; i++)
 155         {
 156           if (strcmp (list->parents[i].mime, line) == 0)
 157             {
 158               entry = &(list->parents[i]);
 159               break;
 160             }
 161         }
 162
 163       if (!entry)
 164         {
 165           if (list->n_mimes == alloc)
 166             {
 167               alloc <<= 1;
 168               list->parents = realloc (list->parents,
 169                                        alloc * sizeof (XdgMimeParents));
 170             }
 171           list->parents[list->n_mimes].mime = strdup (line);
 172           list->parents[list->n_mimes].parents = NULL;
 173           entry = &(list->parents[list->n_mimes]);
 174           list->n_mimes++;
 175         }
 176
 177       if (!entry->parents)
 178         {
 179           entry->n_parents = 1;
 180           entry->parents = malloc ((entry->n_parents + 1) * sizeof (char *));
 181         }
 182       else
 183         {
 184           entry->n_parents += 1;
 185           entry->parents = realloc (entry->parents,
 186                                     (entry->n_parents + 2) * sizeof (char *));
 187         }
 188       entry->parents[entry->n_parents - 1] = strdup (sep);
 189       entry->parents[entry->n_parents] = NULL;
 190     }
 191
 192   list->parents = realloc (list->parents,
 193                            list->n_mimes * sizeof (XdgMimeParents));
 194
 195   fclose (file);
 196
 197   if (list->n_mimes > 1)
 198     qsort (list->parents, list->n_mimes,
 199            sizeof (XdgMimeParents), &parent_entry_cmp);
 200 }
 201
 202
 203 void
 204 _xdg_mime_parent_list_dump (XdgParentList *list)
 205 {
 206   int i;
 207   char **p;
 208
 209   if (list->parents)
 210     {
 211       for (i = 0; i < list->n_mimes; i++)
 212         {
 213           for (p = list->parents[i].parents; *p; p++)
 214             printf ("%s %s\n", list->parents[i].mime, *p);
 215         }
 216     }
 217 }
 218
 219