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