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/* chardefs.h -- Character definitions for readline. */
/* Copyright (C) 1994 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 1, 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,
675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef _CHARDEFS_H_
#define _CHARDEFS_H_
#include <ctype.h>
#if defined (HAVE_CONFIG_H)
# if defined (HAVE_STRING_H)
# include <string.h>
# else
# include <strings.h>
# endif /* HAVE_STRING_H */
#else
# include <string.h>
#endif /* !HAVE_CONFIG_H */
#ifndef whitespace
#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
#endif
#ifdef CTRL
#undef CTRL
#endif
/* Some character stuff. */
#define control_character_threshold 0x020 /* Smaller than this is control. */
#define control_character_mask 0x1f /* 0x20 - 1 */
#define meta_character_threshold 0x07f /* Larger than this is Meta. */
#define control_character_bit 0x40 /* 0x000000, must be off. */
#define meta_character_bit 0x080 /* x0000000, must be on. */
#define largest_char 255 /* Largest character value. */
#define CTRL_CHAR(c) ((c) < control_character_threshold && (c) >= 0)
#define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
#define CTRL(c) ((c) & control_character_mask)
#define META(c) ((c) | meta_character_bit)
#define UNMETA(c) ((c) & (~meta_character_bit))
#define UNCTRL(c) _rl_to_upper(((c)|control_character_bit))
/* Old versions
#define _rl_lowercase_p(c) (((c) > ('a' - 1) && (c) < ('z' + 1)))
#define _rl_uppercase_p(c) (((c) > ('A' - 1) && (c) < ('Z' + 1)))
#define _rl_digit_p(c) ((c) >= '0' && (c) <= '9')
*/
#define _rl_lowercase_p(c) (islower(c))
#define _rl_uppercase_p(c) (isupper(c))
#define _rl_digit_p(x) (isdigit (x))
#define _rl_pure_alphabetic(c) (_rl_lowercase_p(c) || _rl_uppercase_p(c))
#define ALPHABETIC(c) (_rl_lowercase_p(c) || _rl_uppercase_p(c) || _rl_digit_p(c))
/* Old versions
# define _rl_to_upper(c) (_rl_lowercase_p(c) ? ((c) - 32) : (c))
# define _rl_to_lower(c) (_rl_uppercase_p(c) ? ((c) + 32) : (c))
*/
#ifndef _rl_to_upper
# define _rl_to_upper(c) (islower(c) ? toupper(c) : (c))
# define _rl_to_lower(c) (isupper(c) ? tolower(c) : (c))
#endif
#ifndef _rl_digit_value
#define _rl_digit_value(x) ((x) - '0')
#endif
#ifndef NEWLINE
#define NEWLINE '\n'
#endif
#ifndef RETURN
#define RETURN CTRL('M')
#endif
#ifndef RUBOUT
#define RUBOUT 0x7f
#endif
#ifndef TAB
#define TAB '\t'
#endif
#ifdef ABORT_CHAR
#undef ABORT_CHAR
#endif
#define ABORT_CHAR CTRL('G')
#ifdef PAGE
#undef PAGE
#endif
#define PAGE CTRL('L')
#ifdef SPACE
#undef SPACE
#endif
#define SPACE ' ' /* XXX - was 0x20 */
#ifdef ESC
#undef ESC
#endif
#define ESC CTRL('[')
#endif /* _CHARDEFS_H_ */
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