Add xdg mime support on Linux.

base/third_party/xdg_mime/xdgmimealias.c

+/* -*- mode: C; c-file-style: "gnu" -*- */
+/* xdgmimealias.c: Private file.  Datastructure for storing the aliases.
+ *
+ * More info can be found at http://www.freedesktop.org/standards/
+ *
+ * Copyright (C) 2004  Red Hat, Inc.
+ * Copyright (C) 2004  Matthias Clasen <mclasen@redhat.com>
+ *
+ * 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 "xdgmimealias.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 XdgAlias XdgAlias;
+
+struct XdgAlias 
+{
+  char *alias;
+  char *mime_type;
+};
+
+struct XdgAliasList
+{
+  struct XdgAlias *aliases;
+  int n_aliases;
+};
+
+XdgAliasList *
+_xdg_mime_alias_list_new (void)
+{
+  XdgAliasList *list;
+
+  list = malloc (sizeof (XdgAliasList));
+
+  list->aliases = NULL;
+  list->n_aliases = 0;
+
+  return list;
+}
+
+void         
+_xdg_mime_alias_list_free (XdgAliasList *list)
+{
+  int i;
+
+  if (list->aliases)
+    {
+      for (i = 0; i < list->n_aliases; i++)
+        {
+          free (list->aliases[i].alias);
+          free (list->aliases[i].mime_type);
+        }
+      free (list->aliases);
+    }
+  free (list);
+}
+
+static int
+alias_entry_cmp (const void *v1, const void *v2)
+{
+  return strcmp (((XdgAlias *)v1)->alias, ((XdgAlias *)v2)->alias);
+}
+
+const char  *
+_xdg_mime_alias_list_lookup (XdgAliasList *list,
+                             const char   *alias)
+{
+  XdgAlias *entry;
+  XdgAlias key;
+
+  if (list->n_aliases > 0)
+    {
+      key.alias = (char *)alias;
+      key.mime_type = NULL;
+
+      entry = bsearch (&key, list->aliases, list->n_aliases,
+                       sizeof (XdgAlias), alias_entry_cmp);
+      if (entry)
+        return entry->mime_type;
+    }
+
+  return NULL;
+}
+
+void
+_xdg_mime_alias_read_from_file (XdgAliasList *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_aliases + 16;
+  list->aliases = realloc (list->aliases, alloc * sizeof (XdgAlias));
+  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_aliases == alloc)
+        {
+          alloc <<= 1;
+          list->aliases = realloc (list->aliases, 
+                                   alloc * sizeof (XdgAlias));
+        }
+      list->aliases[list->n_aliases].alias = strdup (line);
+      list->aliases[list->n_aliases].mime_type = strdup (sep);
+      list->n_aliases++;
+    }
+  list->aliases = realloc (list->aliases, 
+                           list->n_aliases * sizeof (XdgAlias));
+
+  fclose (file);  
+  
+  if (list->n_aliases > 1)
+    qsort (list->aliases, list->n_aliases, 
+           sizeof (XdgAlias), alias_entry_cmp);
+}
+
+
+void
+_xdg_mime_alias_list_dump (XdgAliasList *list)
+{
+  int i;
+
+  if (list->aliases)
+    {
+      for (i = 0; i < list->n_aliases; i++)
+        {
+          printf ("%s %s\n", 
+                  list->aliases[i].alias,
+                  list->aliases[i].mime_type);
+        }
+    }
+}
+
+