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/* manexamp.c -- The examples which appear in the documentation are here. */
/* Copyright (C) 1987-2002 Free Software Foundation, Inc.
This file is part of the GNU Readline Library, a library for
reading lines of text with interactive input and history editing.
The GNU Readline Library is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2, or
(at your option) any later version.
The GNU Readline Library is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#include <stdio.h>
#include <readline/readline.h>
/* **************************************************************** */
/* */
/* How to Emulate gets () */
/* */
/* **************************************************************** */
/* A static variable for holding the line. */
static char *line_read = (char *)NULL;
/* Read a string, and return a pointer to it. Returns NULL on EOF. */
char *
rl_gets ()
{
/* If the buffer has already been allocated, return the memory
to the free pool. */
if (line_read)
{
free (line_read);
line_read = (char *)NULL;
}
/* Get a line from the user. */
line_read = readline ("");
/* If the line has any text in it, save it on the history. */
if (line_read && *line_read)
add_history (line_read);
return (line_read);
}
/* **************************************************************** */
/* */
/* Writing a Function to be Called by Readline. */
/* */
/* **************************************************************** */
/* Invert the case of the COUNT following characters. */
invert_case_line (count, key)
int count, key;
{
register int start, end;
start = rl_point;
if (count < 0)
{
direction = -1;
count = -count;
}
else
direction = 1;
/* Find the end of the range to modify. */
end = start + (count * direction);
/* Force it to be within range. */
if (end > rl_end)
end = rl_end;
else if (end < 0)
end = -1;
if (start > end)
{
int temp = start;
start = end;
end = temp;
}
if (start == end)
return;
/* Tell readline that we are modifying the line, so save the undo
information. */
rl_modifying (start, end);
for (; start != end; start += direction)
{
if (_rl_uppercase_p (rl_line_buffer[start]))
rl_line_buffer[start] = _rl_to_lower (rl_line_buffer[start]);
else if (_rl_lowercase_p (rl_line_buffer[start]))
rl_line_buffer[start] = _rl_to_upper (rl_line_buffer[start]);
}
/* Move point to on top of the last character changed. */
rl_point = end - direction;
}
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