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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [readline/] [examples/] [manexamp.c] - Blame information for rev 157

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1 24 jeremybenn
/* manexamp.c -- The examples which appear in the documentation are here. */
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/* Copyright (C) 1987-2002 Free Software Foundation, Inc.
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   This file is part of the GNU Readline Library, a library for
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   reading lines of text with interactive input and history editing.
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   The GNU Readline Library is free software; you can redistribute it
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   and/or modify it under the terms of the GNU General Public License
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   as published by the Free Software Foundation; either version 2, or
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   (at your option) any later version.
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   The GNU Readline Library is distributed in the hope that it will be
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   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   The GNU General Public License is often shipped with GNU software, and
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   is generally kept in a file called COPYING or LICENSE.  If you do not
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   have a copy of the license, write to the Free Software Foundation,
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   59 Temple Place, Suite 330, Boston, MA 02111 USA. */
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#include <stdio.h>
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#include <readline/readline.h>
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/* **************************************************************** */
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/*                                                                  */
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/*                      How to Emulate gets ()                      */
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/*                                                                  */
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/* **************************************************************** */
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/* A static variable for holding the line. */
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static char *line_read = (char *)NULL;
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/* Read a string, and return a pointer to it.  Returns NULL on EOF. */
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char *
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rl_gets ()
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{
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  /* If the buffer has already been allocated, return the memory
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     to the free pool. */
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  if (line_read)
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    {
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      free (line_read);
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      line_read = (char *)NULL;
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    }
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  /* Get a line from the user. */
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  line_read = readline ("");
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  /* If the line has any text in it, save it on the history. */
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  if (line_read && *line_read)
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    add_history (line_read);
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  return (line_read);
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}
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/* **************************************************************** */
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/*                                                                  */
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/*        Writing a Function to be Called by Readline.              */
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/*                                                                  */
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/* **************************************************************** */
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/* Invert the case of the COUNT following characters. */
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invert_case_line (count, key)
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     int count, key;
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{
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  register int start, end;
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  start = rl_point;
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  if (count < 0)
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    {
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      direction = -1;
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      count = -count;
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    }
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  else
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    direction = 1;
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  /* Find the end of the range to modify. */
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  end = start + (count * direction);
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  /* Force it to be within range. */
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  if (end > rl_end)
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    end = rl_end;
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  else if (end < 0)
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    end = -1;
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  if (start > end)
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    {
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      int temp = start;
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      start = end;
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      end = temp;
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    }
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  if (start == end)
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    return;
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  /* Tell readline that we are modifying the line, so save the undo
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     information. */
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  rl_modifying (start, end);
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  for (; start != end; start += direction)
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    {
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      if (_rl_uppercase_p (rl_line_buffer[start]))
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        rl_line_buffer[start] = _rl_to_lower (rl_line_buffer[start]);
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      else if (_rl_lowercase_p (rl_line_buffer[start]))
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        rl_line_buffer[start] = _rl_to_upper (rl_line_buffer[start]);
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    }
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  /* Move point to on top of the last character changed. */
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  rl_point = end - direction;
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}

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