/* chardefs.h -- Character definitions for readline. */

/* Copyright (C) 1994-2009 Free Software Foundation, Inc.

   This file is part of the GNU Readline Library (Readline), a library

   for reading lines of text with interactive input and history editing.

   Readline 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 3 of the License, or

   (at your option) any later version.

   Readline 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.

   You should have received a copy of the GNU General Public License

   along with Readline.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef _CHARDEFS_H_

#define _CHARDEFS_H_

#include <ctype.h>

#if defined (HAVE_CONFIG_H)

#  if defined (HAVE_STRING_H)

#    if ! defined (STDC_HEADERS) && defined (HAVE_MEMORY_H)

#      include <memory.h>

#    endif

#    include <string.h>

#  endif /* HAVE_STRING_H */

#  if defined (HAVE_STRINGS_H)

#    include <strings.h>

#  endif /* HAVE_STRINGS_H */

#else

#  include <string.h>

#endif /* !HAVE_CONFIG_H */

#ifndef whitespace

#define whitespace(c) (((c) == ' ') || ((c) == '\t'))

#endif

#ifdef CTRL

#  undef CTRL

#endif

#ifdef UNCTRL

#  undef UNCTRL

#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) & 0x80) == 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))

#if defined STDC_HEADERS || (!defined (isascii) && !defined (HAVE_ISASCII))

#  define IN_CTYPE_DOMAIN(c) 1

#else

#  define IN_CTYPE_DOMAIN(c) isascii(c)

#endif

#if !defined (isxdigit) && !defined (HAVE_ISXDIGIT)

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

#endif

#if defined (CTYPE_NON_ASCII)

#  define NON_NEGATIVE(c) 1

#else

#  define NON_NEGATIVE(c) ((unsigned char)(c) == (c))

#endif

/* Some systems define these; we want our definitions. */

#undef ISPRINT

/* Beware:  these only work with single-byte ASCII characters. */

#define ISALNUM(c)	(IN_CTYPE_DOMAIN (c) && isalnum (c))

#define ISALPHA(c)	(IN_CTYPE_DOMAIN (c) && isalpha (c))

#define ISDIGIT(c)	(IN_CTYPE_DOMAIN (c) && isdigit (c))

#define ISLOWER(c)	(IN_CTYPE_DOMAIN (c) && islower (c))

#define ISPRINT(c)	(IN_CTYPE_DOMAIN (c) && isprint (c))

#define ISUPPER(c)	(IN_CTYPE_DOMAIN (c) && isupper (c))

#define ISXDIGIT(c)	(IN_CTYPE_DOMAIN (c) && isxdigit (c))

#define _rl_lowercase_p(c)	(NON_NEGATIVE(c) && ISLOWER(c))

#define _rl_uppercase_p(c)	(NON_NEGATIVE(c) && ISUPPER(c))

#define _rl_digit_p(c)		((c) >= '0' && (c) <= '9')

#define _rl_pure_alphabetic(c)	(NON_NEGATIVE(c) && ISALPHA(c))

#define ALPHABETIC(c)		(NON_NEGATIVE(c) && ISALNUM(c))

#ifndef _rl_to_upper

#  define _rl_to_upper(c) (_rl_lowercase_p(c) ? toupper((unsigned char)c) : (c))

#  define _rl_to_lower(c) (_rl_uppercase_p(c) ? tolower((unsigned char)c) : (c))

#endif

#ifndef _rl_digit_value

#  define _rl_digit_value(x) ((x) - '0')

#endif

#ifndef _rl_isident

#  define _rl_isident(c) (ISALNUM(c) || (c) == '_')

#endif

#ifndef ISOCTAL

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

#endif

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

#define HEXVALUE(c) \

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

  	? (c)-'a'+10 \

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

#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_ */