+/* A wrapper around iconv_open */
+static iconv_t
+create_iconv (const char* tocode, const char* fromcode)
+{
+ iconv_t conv;
+ struct hmapx_node *node;
+ size_t hash ;
+ char *key = alloca (strlen (tocode) + strlen (fromcode) + 2);
+
+ strcpy (key, tocode);
+ strcat (key, "\n"); /* hopefully no encoding names contain '\n' */
+ strcat (key, fromcode);
+
+ hash = hsh_hash_string (key);
+
+ node = hmapx_first_with_hash (&map, hash);
+
+ if (!node)
+ {
+ conv = iconv_open (tocode, fromcode);
+
+ /* I don't think it's safe to translate this string or to use messaging
+ as the convertors have not yet been set up */
+ if ( (iconv_t) -1 == conv && 0 != strcmp (tocode, fromcode))
+ {
+ const int err = errno;
+ fprintf (stderr,
+ "Warning: "
+ "cannot create a convertor for \"%s\" to \"%s\": %s\n",
+ fromcode, tocode, strerror (err));
+ }
+
+ hmapx_insert (&map, conv, hash);
+ }
+ else
+ {
+ conv = hmapx_node_data (node);
+ }
+
+ return conv;
+}