/****************************************************************************
* apps/system/readline/readline.h
*
* Copyright (C) 2013 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_SYSTEM_READLINE_READLINE_H
#define __APPS_SYSTEM_READLINE_READLINE_H 1
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* In some systems, the underlying serial logic may automatically echo
* characters back to the console. We will assume that that is not the case
& here
*/
#define CONFIG_READLINE_ECHO 1
/* Some environments may return CR as end-of-line, others LF, and others
* both. If not specified, the logic here assumes either (but not both) as
* the default.
*/
#if defined(CONFIG_EOL_IS_CR)
# undef CONFIG_EOL_IS_LF
# undef CONFIG_EOL_IS_BOTH_CRLF
# undef CONFIG_EOL_IS_EITHER_CRLF
#elif defined(CONFIG_EOL_IS_LF)
# undef CONFIG_EOL_IS_CR
# undef CONFIG_EOL_IS_BOTH_CRLF
# undef CONFIG_EOL_IS_EITHER_CRLF
#elif defined(CONFIG_EOL_IS_BOTH_CRLF)
# undef CONFIG_EOL_IS_CR
# undef CONFIG_EOL_IS_LF
# undef CONFIG_EOL_IS_EITHER_CRLF
#elif defined(CONFIG_EOL_IS_EITHER_CRLF)
# undef CONFIG_EOL_IS_CR
# undef CONFIG_EOL_IS_LF
# undef CONFIG_EOL_IS_BOTH_CRLF
#else
# undef CONFIG_EOL_IS_CR
# undef CONFIG_EOL_IS_LF
# undef CONFIG_EOL_IS_BOTH_CRLF
# define CONFIG_EOL_IS_EITHER_CRLF 1
#endif
/* Helper macros */
#define RL_GETC(v) ((v)->rl_getc(v))
#define RL_PUTC(v,ch) ((v)->rl_putc(v,ch))
#define RL_WRITE(v,b,s) ((v)->rl_write(v,b,s))
/****************************************************************************
* Public Type Declarations
****************************************************************************/
struct rl_common_s
{
int (*rl_getc)(FAR struct rl_common_s *vtbl);
#ifdef CONFIG_READLINE_ECHO
void (*rl_putc)(FAR struct rl_common_s *vtbl, int ch);
void (*rl_write)(FAR struct rl_common_s *vtbl, FAR const char *buffer,
size_t buflen);
#endif
};
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: readline_common
*
* Common logic shared by readline and std_readline().
*
* Input Parameters:
* buf - The user allocated buffer to be filled.
* buflen - the size of the buffer.
* instream - The stream to read characters from
* outstream - The stream to each characters to.
*
* Returned values:
* On success, the (positive) number of bytes transferred is returned.
* EOF is returned to indicate either an end of file condition or a
* failure.
*
**************************************************************************/
ssize_t readline_common(FAR struct rl_common_s *vtbl, FAR char *buf, int buflen);
#endif /* __APPS_SYSTEM_READLINE_READLINE_H */
