trying to port statvfs call to BSD

[oweals/gnunet.git] / src / util / container_meta_data.c

diff --git a/src/util/container_meta_data.c b/src/util/container_meta_data.c
index e9c33bab2af50cbdf13aaf794ecc24852b4ad85b..039ba86ab2dfc4c26dca7a3194efced41aa99e3b 100644 (file)
--- a/src/util/container_meta_data.c
+++ b/src/util/container_meta_data.c
@@ -169,6 +169,29 @@ GNUNET_CONTAINER_meta_data_destroy (struct GNUNET_CONTAINER_MetaData *md)
 }
 
 
+/**
+ * Remove all items in the container.
+ *
+ * @param md metadata to manipulate
+ */
+void 
+GNUNET_CONTAINER_meta_data_clear (struct GNUNET_CONTAINER_MetaData *md)
+{
+  struct MetaItem *item;
+
+  if (md == NULL)
+    return;
+  while (NULL != (item = md->items))
+    {
+      md->items = item->next;
+      meta_item_free (item);
+    }
+  GNUNET_free_non_null (md->sbuf);
+  memset (md, 0, sizeof (struct GNUNET_CONTAINER_MetaData));
+}
+
+
+
 /**
  * Test if two MDs are equal.  We consider them equal if
  * the meta types, formats and content match (we do not
@@ -451,6 +474,8 @@ GNUNET_CONTAINER_meta_data_iterate (const struct
 {
   struct MetaItem *pos;
 
+  if (md == NULL)
+    return 0;
   if (iter == NULL)
     return md->item_count;
   pos = md->items;
@@ -486,6 +511,8 @@ GNUNET_CONTAINER_meta_data_get_by_type (const struct GNUNET_CONTAINER_MetaData
 {
   struct MetaItem *pos;
 
+  if (md == NULL)
+    return NULL;
   pos = md->items;
   while (NULL != pos)
     {
@@ -519,6 +546,8 @@ GNUNET_CONTAINER_meta_data_get_first_by_types (const struct
   va_list args;
   enum EXTRACTOR_MetaType type;
 
+  if (md == NULL)
+    return NULL;
   ret = NULL;
   va_start (args, md);
   while (1)
@@ -551,11 +580,14 @@ GNUNET_CONTAINER_meta_data_get_thumbnail (const struct
   struct MetaItem *pos;
   struct MetaItem *match;
 
+  if (md == NULL)
+    return 0;
   match = NULL;
   pos = md->items;
   while (NULL != pos)
-    {
-      if ( (0 == strncasecmp ("image/", pos->mime_type,
+    {      
+      if ( (NULL != pos->mime_type) && 
+          (0 == strncasecmp ("image/", pos->mime_type,
                              strlen("image/"))) &&
           (pos->format == EXTRACTOR_METAFORMAT_BINARY) )
        {
@@ -608,71 +640,6 @@ GNUNET_CONTAINER_meta_data_duplicate (const struct GNUNET_CONTAINER_MetaData
 }
 
 
-/**
- * Add meta data that libextractor finds to our meta data
- * container.
- *
- * @param cls closure, our meta data container
- * @param plugin_name name of the plugin that produced this value;
- *        special values can be used (i.e. '<zlib>' for zlib being
- *        used in the main libextractor library and yielding
- *        meta data).
- * @param type libextractor-type describing the meta data
- * @param format basic format information about data
- * @param data_mime_type mime-type of data (not of the original file);
- *        can be NULL (if mime-type is not known)
- * @param data actual meta-data found
- * @param data_len number of bytes in data
- * @return always 0 to continue extracting
- */
-static int
-add_to_md(void *cls,
-         const char *plugin_name,
-         enum EXTRACTOR_MetaType type,
-         enum EXTRACTOR_MetaFormat format,
-         const char *data_mime_type,
-         const char *data,
-         size_t data_len)
-{
-  struct GNUNET_CONTAINER_MetaData *md = cls;
-  (void) GNUNET_CONTAINER_meta_data_insert (md,
-                                           plugin_name,
-                                           type,
-                                           format,
-                                           data_mime_type,
-                                           data,
-                                           data_len);
-  return 0;
-}
-
-
-/**
- * Extract meta-data from a file.
- *
- * @return GNUNET_SYSERR on error, otherwise the number
- *   of meta-data items obtained
- */
-int
-GNUNET_CONTAINER_meta_data_extract_from_file (struct GNUNET_CONTAINER_MetaData
-                                              *md, const char *filename,
-                                              struct EXTRACTOR_PluginList *
-                                              extractors)
-{
-  unsigned int old;
-
-  if (filename == NULL)
-    return GNUNET_SYSERR;
-  if (extractors == NULL)
-    return 0;
-  old = md->item_count;
-  EXTRACTOR_extract (extractors, 
-                    filename,
-                    NULL, 0,
-                    &add_to_md,
-                    md);
-  return (int) (md->item_count - old);
-}
-
 
 /**
  * Try to compress the given block of data.