/* 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_ */