/* 
*
* Modified from the following linenoise source.
*
* Copyright (c) 2014 Texas Instruments Inc.
*
* ---------------------------------------------------------------------
* linenoise.h -- guerrilla line editing library against the idea that a
* line editing lib needs to be 20,000 lines of C code.
*
* See linenoise.c for more information.
*
* ------------------------------------------------------------------------
*
* Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com>
* Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
*  *  Redistributions of source code must retain the above copyright
*     notice, this list of conditions and the following disclaimer.
*
*  *  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.
*
* 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
* HOLDER 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 __LINENOISE_H
#define __LINENOISE_H

#include <functional>

namespace LineNoise
{

#ifndef NO_COMPLETION
struct linenoiseCompletions {
  size_t len;
  char **cvec;
};

/*
* The callback type for tab completion handlers.
*/
typedef std::function<void(const char *, linenoiseCompletions *)> LinenoiseCompletionCallback;

/*
* Sets the current tab completion handler and returns the previous one, or NULL
* if no prior one has been set.
*/
LinenoiseCompletionCallback linenoiseSetCompletionCallback(LinenoiseCompletionCallback);

/*
* Adds a copy of the given string to the given completion list. The copy is owned
* by the linenoiseCompletions object.
*/
void linenoiseAddCompletion(linenoiseCompletions *, const char *);
#endif

/*
* Prompts for input using the given string as the input
* prompt. Returns when the user has tapped ENTER or (on an empty
* line) EOF (Ctrl-D on Unix, Ctrl-Z on Windows). Returns either
* a copy of the entered string (for ENTER) or NULL (on EOF).  The
* caller owns the returned string and must eventually free() it.
*/
char *linenoise(const char *prompt);

/*
* Adds a copy of the given line of the command history.
*/
int linenoiseHistoryAdd(const char *line);

/*
* Sets the maximum length of the command history, in lines.
* If the history is currently longer, it will be trimmed,
* retaining only the most recent entries. If len is 0 or less
* then this function does nothing.
*/
int linenoiseHistorySetMaxLen(int len);

/*
* Returns the current maximum length of the history, in lines.
*/
int linenoiseHistoryGetMaxLen(void);

/*
* Saves the current contents of the history to the given file.
* Returns 0 on success.
*/
int linenoiseHistorySave(const char *filename);

/*
* Replaces the current history with the contents
* of the given file.  Returns 0 on success.
*/
int linenoiseHistoryLoad(const char *filename);

/*
* Frees all history entries, clearing the history.
*/
void linenoiseHistoryFree(void);

/*
* Returns a pointer to the list of history entries, writing its
* length to *len if len is not NULL. The memory is owned by linenoise
* and must not be freed.
*/
char **linenoiseHistory(int *len);

/*
* Returns the number of display columns in the current terminal.
*/
int linenoiseColumns(void);
}
#endif /* __LINENOISE_H */
