Add xdg mime support on Linux.

base/third_party/xdg_mime/xdgmimeicon.c

+/* -*- mode: C; c-file-style: "gnu" -*- */
+/* xdgmimeicon.c: Private file.  Datastructure for storing the aliases.
+ *
+ * More info can be found at http://www.freedesktop.org/standards/
+ *
+ * Copyright (C) 2008  Red Hat, Inc.
+ *
+ * Licensed under the Academic Free License version 2.0
+ * Or under the following terms:
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "xdgmimeicon.h"
+#include "xdgmimeint.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <string.h>
+#include <fnmatch.h>
+
+#ifndef FALSE
+#define FALSE   (0)
+#endif
+
+#ifndef TRUE
+#define TRUE    (!FALSE)
+#endif
+
+typedef struct XdgIcon XdgIcon;
+
+struct XdgIcon 
+{
+  char *mime_type;
+  char *icon_name;
+};
+
+struct XdgIconList
+{
+  struct XdgIcon *icons;
+  int n_icons;
+};
+
+XdgIconList *
+_xdg_mime_icon_list_new (void)
+{
+  XdgIconList *list;
+
+  list = malloc (sizeof (XdgIconList));
+
+  list->icons = NULL;
+  list->n_icons = 0;
+
+  return list;
+}
+
+void         
+_xdg_mime_icon_list_free (XdgIconList *list)
+{
+  int i;
+
+  if (list->icons)
+    {
+      for (i = 0; i < list->n_icons; i++)
+        {
+          free (list->icons[i].mime_type);
+          free (list->icons[i].icon_name);
+        }
+      free (list->icons);
+    }
+  free (list);
+}
+
+static int
+icon_entry_cmp (const void *v1, const void *v2)
+{
+  return strcmp (((XdgIcon *)v1)->mime_type, ((XdgIcon *)v2)->mime_type);
+}
+
+const char  *
+_xdg_mime_icon_list_lookup (XdgIconList *list,
+                            const char  *mime_type)
+{
+  XdgIcon *entry;
+  XdgIcon key;
+
+  if (list->n_icons > 0)
+    {
+      key.mime_type = (char *)mime_type;
+      key.icon_name = NULL;
+
+      entry = bsearch (&key, list->icons, list->n_icons,
+                       sizeof (XdgIcon), icon_entry_cmp);
+      if (entry)
+        return entry->icon_name;
+    }
+
+  return NULL;
+}
+
+void
+_xdg_mime_icon_read_from_file (XdgIconList *list,
+                               const char   *file_name)
+{
+  FILE *file;
+  char line[255];
+  int alloc;
+
+  file = fopen (file_name, "r");
+
+  if (file == NULL)
+    return;
+
+  /* FIXME: Not UTF-8 safe.  Doesn't work if lines are greater than 255 chars.
+   * Blah */
+  alloc = list->n_icons + 16;
+  list->icons = realloc (list->icons, alloc * sizeof (XdgIcon));
+  while (fgets (line, 255, file) != NULL)
+    {
+      char *sep;
+      if (line[0] == '#')
+        continue;
+
+      sep = strchr (line, ':');
+      if (sep == NULL)
+        continue;
+      *(sep++) = '\000';
+      sep[strlen (sep) -1] = '\000';
+      if (list->n_icons == alloc)
+        {
+          alloc <<= 1;
+          list->icons = realloc (list->icons, 
+                                   alloc * sizeof (XdgIcon));
+        }
+      list->icons[list->n_icons].mime_type = strdup (line);
+      list->icons[list->n_icons].icon_name = strdup (sep);
+      list->n_icons++;
+    }
+  list->icons = realloc (list->icons, 
+                           list->n_icons * sizeof (XdgIcon));
+
+  fclose (file);  
+  
+  if (list->n_icons > 1)
+    qsort (list->icons, list->n_icons, 
+           sizeof (XdgIcon), icon_entry_cmp);
+}
+
+
+void
+_xdg_mime_icon_list_dump (XdgIconList *list)
+{
+  int i;
+
+  if (list->icons)
+    {
+      for (i = 0; i < list->n_icons; i++)
+        {
+          printf ("%s %s\n", 
+                  list->icons[i].mime_type,
+                  list->icons[i].icon_name);
+        }
+    }
+}
+
+