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/* 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 */
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