Add internal-only port structure and move iconv descriptors there.

[bpt/guile.git] / libguile / ports-internal.h

diff --git a/libguile/ports-internal.h b/libguile/ports-internal.h
new file mode 100644 (file)
index 0000000..b6a98e3
--- /dev/null
+++ b/libguile/ports-internal.h
@@ -0,0 +1,40 @@
+/*
+ * ports-internal.h - internal-only declarations for ports.
+ *
+ * Copyright (C) 2013 Free Software Foundation, Inc.
+ *
+ * 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 3 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef SCM_PORTS_INTERNAL
+#define SCM_PORTS_INTERNAL
+
+#include "libguile/_scm.h"
+#include "libguile/ports.h"
+
+struct scm_port_internal
+{
+  /* input/output iconv conversion descriptors */
+  void *input_cd;
+  void *output_cd;
+};
+
+typedef struct scm_port_internal scm_t_port_internal;
+
+#define SCM_PORT_GET_INTERNAL(x)                                \
+  ((scm_t_port_internal *) (SCM_PTAB_ENTRY(x)->input_cd))
+
+#endif