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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('[')

#ifndef ISOCTAL

#define ISOCTAL(c)      ((c) >= '0' && (c) <= '7')

#endif

#define OCTVALUE(c)     ((c) - '0')

#ifndef isxdigit

#  define isxdigit(c)   (isdigit((c)) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))

#endif

#define HEXVALUE(c) \

  (((c) >= 'a' && (c) <= 'f') \

        ? (c)-'a'+10 \

        : (c) >= 'A' && (c) <= 'F' ? (c)-'A'+10 : (c)-'0')

#endif  /* _CHARDEFS_H_ */