1 files changed, 91 insertions, 0 deletions
diff --git a/lib/vio_lines.h b/lib/vio_lines.h
new file mode 100644
index 00000000..ffef94ec
--- /dev/null
+++ b/lib/vio_lines.h
@@ -0,0 +1,91 @@
+/* Line Control for VTY Terminal output -- header
+ * Copyright (C) 2009 Chris Hall (GMCH), Highwayman
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your
+ * option) any later version.
+ *
+ * GNU Zebra 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING.  If not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_VIO_LINES_H
+#define _ZEBRA_VIO_LINES_H
+
+#include "zebra.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "qiovec.h"
+
+#ifndef Inline
+#define Inline static inline
+#endif
+
+/*==============================================================================
+ *
+ */
+
+/*------------------------------------------------------------------------------
+ * Line control -- collecting lines of a given width for output.
+ *
+ * NB: a completely zero structure is a valid, clear vio_line_control.
+ */
+
+typedef struct vio_line_control* vio_line_control ;
+typedef struct vio_line_control  vio_line_control_t ;
+struct vio_line_control
+{
+  unsigned      width ;   /* console width       -- 0 => HUGE           */
+  unsigned      height ;  /* console height      -- 0 => indefinite     */
+
+  unsigned      pause ;   /* number of lines to next pause
+                                                    0 => indefinite     */
+  bool          paused ;  /* true <=> last append stopped on pause      */
+
+  unsigned      col ;     /* current column position                    */
+  unsigned      line ;    /* line number of last complete line          */
+
+  struct qiovec qiov ;    /* iovec control                              */
+  bool          writing ; /* write started, but not completed           */
+} ;
+
+/*==============================================================================
+ * Functions
+ */
+extern vio_line_control vio_lc_init_new(vio_line_control lc, int width,
+                                                                   int height) ;
+extern vio_line_control vio_lc_reset(vio_line_control lc, bool free_structure) ;
+
+#define vio_lc_reset_keep(lc) vio_lc_reset(lc, 0)
+#define vio_lc_reset_free(lc) vio_lc_reset(lc, 1)
+
+Inline bool vio_lc_empty(vio_line_control lc) ;
+extern void vio_lc_clear(vio_line_control lc) ;
+extern void vio_lc_set_window(vio_line_control lc, int width, int height) ;
+
+extern void vio_lc_set_pause(vio_line_control lc) ;
+extern size_t vio_lc_append(vio_line_control lc, const void* buf, size_t len) ;
+extern int vio_lc_write_nb(int fd, vio_line_control lc) ;
+
+/*------------------------------------------------------------------------------
+ * Is given line control empty ?
+ */
+Inline bool
+vio_lc_empty(vio_line_control lc)
+{
+  return qiovec_empty(&lc->qiov) ;
+} ;
+
+#endif /* _ZEBRA_VIO_LINES_H */