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+/* chardefs.h -- Character definitions for readline. */
+
+/* Copyright (C) 1994-2021 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)
+# 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))
+
+#ifndef UCHAR_MAX
+# define UCHAR_MAX 255
+#endif
+#ifndef CHAR_MAX
+# define CHAR_MAX 127
+#endif
+
+/* use this as a proxy for C89 */
+#if defined (HAVE_STDLIB_H) && defined (HAVE_STRING_H)
+# define IN_CTYPE_DOMAIN(c) 1
+# define NON_NEGATIVE(c) 1
+#else
+# define IN_CTYPE_DOMAIN(c) ((c) >= 0 && (c) <= CHAR_MAX)
+# define NON_NEGATIVE(c) ((unsigned char)(c) == (c))
+#endif
+
+#if !defined (isxdigit) && !defined (HAVE_ISXDIGIT) && !defined (__cplusplus)
+# define isxdigit(c) (isdigit((unsigned char)(c)) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
+#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 ((unsigned char)c))
+#define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha ((unsigned char)c))
+#define ISDIGIT(c) (IN_CTYPE_DOMAIN (c) && isdigit ((unsigned char)c))
+#define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower ((unsigned char)c))
+#define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint ((unsigned char)c))
+#define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper ((unsigned char)c))
+#define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit ((unsigned char)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_alphabetic_p(c) (NON_NEGATIVE(c) && ISALNUM(c))
+#define _rl_pure_alphabetic(c) (NON_NEGATIVE(c) && ISALPHA(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_ */