/****************************************************************************
* apps/nshlib/nsh_console.h
*
* Copyright (C) 2007-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __APPS_NSHLIB_NSH_CONSOLE_H
#define __APPS_NSHLIB_NSH_CONSOLE_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <errno.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* Method access macros */
#define nsh_clone(v) (v)->clone(v)
#define nsh_release(v) (v)->release(v)
#define nsh_write(v,b,n) (v)->write(v,b,n)
#define nsh_linebuffer(v) (v)->linebuffer(v)
#define nsh_redirect(v,f,s) (v)->redirect(v,f,s)
#define nsh_undirect(v,s) (v)->undirect(v,s)
#define nsh_exit(v,s) (v)->exit(v,s)
#ifdef CONFIG_CPP_HAVE_VARARGS
# define nsh_output(v, fmt...) (v)->output(v, ##fmt)
#else
# define nsh_output vtbl->output
#endif
/* Size of info to be saved in call to nsh_redirect */
#define SAVE_SIZE (sizeof(int) + sizeof(FILE*) + sizeof(bool))
/* Are we using the NuttX console for I/O? Or some other character device? */
#ifdef CONFIG_NSH_CONDEV
# define INFD(p) ((p)->cn_confd)
# define INSTREAM(p) ((p)->cn_constream)
# define OUTFD(p) ((p)->cn_confd)
# define OUTSTREAM(p) ((p)->cn_constream)
#else
# define INFD(p) 0
# define INSTREAM(p) stdin
# define OUTFD(p) 1
# define OUTSTREAM(p) stdout
#endif
/****************************************************************************
* Public Types
****************************************************************************/
/* This describes a generic console front-end */
struct nsh_vtbl_s
{
/* This function pointers are "hooks" into the front end logic to
* handle things like output of command results, redirection, etc.
* -- all of which must be done in a way that is unique to the nature
* of the front end.
*/
#ifndef CONFIG_NSH_DISABLEBG
FAR struct nsh_vtbl_s *(*clone)(FAR struct nsh_vtbl_s *vtbl);
void (*addref)(FAR struct nsh_vtbl_s *vtbl);
void (*release)(FAR struct nsh_vtbl_s *vtbl);
#endif
ssize_t (*write)(FAR struct nsh_vtbl_s *vtbl, FAR const void *buffer, size_t nbytes);
int (*output)(FAR struct nsh_vtbl_s *vtbl, const char *fmt, ...);
FAR char *(*linebuffer)(FAR struct nsh_vtbl_s *vtbl);
void (*redirect)(FAR struct nsh_vtbl_s *vtbl, int fd, FAR uint8_t *save);
void (*undirect)(FAR struct nsh_vtbl_s *vtbl, FAR uint8_t *save);
void (*exit)(FAR struct nsh_vtbl_s *vtbl, int exitstatus) noreturn_function;
/* Parser state data */
struct nsh_parser_s np;
};
/* This structure describes a console front-end that is based on stdin and
* stdout (which is all of the supported console types at the time being).
*/
struct console_stdio_s
{
/* NSH front-end call table */
struct nsh_vtbl_s cn_vtbl;
/* NSH input/output streams */
#ifdef CONFIG_NSH_CONDEV
int cn_confd; /* Console I/O file descriptor */
#endif
int cn_outfd; /* Output file descriptor (possibly redirected) */
#ifdef CONFIG_NSH_CONDEV
FILE *cn_constream; /* Console I/O stream (possibly redirected) */
#endif
FILE *cn_outstream; /* Output stream */
/* Line input buffer */
char cn_line[CONFIG_NSH_LINELEN];
};
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/* Defined in nsh_console.c *************************************************/
FAR struct console_stdio_s *nsh_newconsole(void);
#endif /* __APPS_NSHLIB_NSH_CONSOLE_H */
