101 lines
4.0 KiB
C
101 lines
4.0 KiB
C
/****************************************************************************
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* apps/include/readline.h
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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_INCLUDE_READLINE_H
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#define __APPS_INCLUDE_READLINE_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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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: readline
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*
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* readline() reads in at most one less than 'buflen' characters from
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* 'instream' and stores them into the buffer pointed to by 'buf'.
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* Characters are echoed on 'outstream'. Reading stops after an EOF or a
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* newline. If a newline is read, it is stored into the buffer. A null
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* terminator is stored after the last character in the buffer.
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*
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* This version of realine assumes that we are reading and writing to
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* a VT100 console. This will not work well if 'instream' or 'outstream'
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* corresponds to a raw byte steam.
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*
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* This function is inspired by the GNU readline but is an entirely
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* different creature.
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*
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* Input Parameters:
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* buf - The user allocated buffer to be filled.
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* buflen - the size of the buffer.
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* instream - The stream to read characters from
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* outstream - The stream to each characters to.
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*
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* Returned values:
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* On success, the (positive) number of bytes transferred is returned.
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* A length of zero would indicated an end of file condition. An failure,
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* a negated errno value is returned.
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*
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**************************************************************************/
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EXTERN ssize_t readline(FAR char *buf, int buflen, FILE *instream, FILE *outstream);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __APPS_INCLUDE_READLINE_H */
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