+static const gchar *compose_untranslated_header_name(gchar *header_name)
+{
+ /* return the untranslated header name, if header_name is a known
+ header name, in either its translated or untranslated form, with
+ or without trailing colon. return NULL if no matching header name
+ is found or if header_name is NULL. */
+ gchar *translated_header_name;
+ gchar *translated_header_name_wcolon;
+ const gchar *untranslated_header_name;
+ const gchar *untranslated_header_name_wcolon;
+ gint i;
+
+ cm_return_val_if_fail(header_name != NULL, NULL);
+
+ for (i = 0; HEADERS[i].header_name != NULL; i++) {
+ untranslated_header_name = HEADERS[i].header_name;
+ untranslated_header_name_wcolon = HEADERS[i].header_name_w_colon;
+
+ translated_header_name = gettext(untranslated_header_name);
+ translated_header_name_wcolon = gettext(untranslated_header_name_wcolon);
+
+ if (!strcmp(header_name, untranslated_header_name) ||
+ !strcmp(header_name, translated_header_name)) {
+ return untranslated_header_name;
+ } else {
+ if (!strcmp(header_name, untranslated_header_name_wcolon) ||
+ !strcmp(header_name, translated_header_name_wcolon)) {
+ return untranslated_header_name_wcolon;
+ }
+ }
+ }
+ debug_print("compose_untranslated_header_name: unknown header '%s'\n", header_name);
+ return NULL;
+}
+