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The C and C++ Include Header Files

/usr/include/readline/chardefs.h


$ cat -n /usr/include/readline/chardefs.h

     1	/* chardefs.h -- Character definitions for readline. */
     2	
     3	/* Copyright (C) 1994-2021 Free Software Foundation, Inc.
     4	
     5	   This file is part of the GNU Readline Library (Readline), a library
     6	   for reading lines of text with interactive input and history editing.
     7	
     8	   Readline is free software: you can redistribute it and/or modify
     9	   it under the terms of the GNU General Public License as published by
    10	   the Free Software Foundation, either version 3 of the License, or
    11	   (at your option) any later version.
    12	
    13	   Readline is distributed in the hope that it will be useful,
    14	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    15	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    16	   GNU General Public License for more details.
    17	
    18	   You should have received a copy of the GNU General Public License
    19	   along with Readline.  If not, see <http://www.gnu.org/licenses/>.
    20	*/
    21	
    22	#ifndef _CHARDEFS_H_
    23	#define _CHARDEFS_H_
    24	
    25	#include <ctype.h>
    26	
    27	#include <string.h>
    28	
    29	#ifndef whitespace
    30	#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
    31	#endif
    32	
    33	#ifdef CTRL
    34	#  undef CTRL
    35	#endif
    36	#ifdef UNCTRL
    37	#  undef UNCTRL
    38	#endif
    39	
    40	/* Some character stuff. */
    41	#define control_character_threshold 0x020   /* Smaller than this is control. */
    42	#define control_character_mask 0x1f	    /* 0x20 - 1 */
    43	#define meta_character_threshold 0x07f	    /* Larger than this is Meta. */
    44	#define control_character_bit 0x40	    /* 0x000000, must be off. */
    45	#define meta_character_bit 0x080	    /* x0000000, must be on. */
    46	#define largest_char 255		    /* Largest character value. */
    47	
    48	#define CTRL_CHAR(c) ((c) < control_character_threshold && (((c) & 0x80) == 0))
    49	#define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
    50	
    51	#define CTRL(c) ((c) & control_character_mask)
    52	#define META(c) ((c) | meta_character_bit)
    53	
    54	#define UNMETA(c) ((c) & (~meta_character_bit))
    55	#define UNCTRL(c) _rl_to_upper(((c)|control_character_bit))
    56	
    57	#ifndef UCHAR_MAX
    58	#  define UCHAR_MAX 255
    59	#endif
    60	#ifndef CHAR_MAX
    61	#  define CHAR_MAX 127
    62	#endif
    63	
    64	/* use this as a proxy for C89 */
    65	#if defined (HAVE_STDLIB_H) && defined (HAVE_STRING_H)
    66	#  define IN_CTYPE_DOMAIN(c) 1
    67	#  define NON_NEGATIVE(c) 1
    68	#else
    69	#  define IN_CTYPE_DOMAIN(c) ((c) >= 0 && (c) <= CHAR_MAX)
    70	#  define NON_NEGATIVE(c) ((unsigned char)(c) == (c))
    71	#endif
    72	
    73	#if !defined (isxdigit) && !defined (HAVE_ISXDIGIT) && !defined (__cplusplus)
    74	#  define isxdigit(c)   (isdigit((unsigned char)(c)) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
    75	#endif
    76	
    77	/* Some systems define these; we want our definitions. */
    78	#undef ISPRINT
    79	
    80	/* Beware:  these only work with single-byte ASCII characters. */
    81	
    82	#define ISALNUM(c)	(IN_CTYPE_DOMAIN (c) && isalnum ((unsigned char)c))
    83	#define ISALPHA(c)	(IN_CTYPE_DOMAIN (c) && isalpha ((unsigned char)c))
    84	#define ISDIGIT(c)	(IN_CTYPE_DOMAIN (c) && isdigit ((unsigned char)c))
    85	#define ISLOWER(c)	(IN_CTYPE_DOMAIN (c) && islower ((unsigned char)c))
    86	#define ISPRINT(c)	(IN_CTYPE_DOMAIN (c) && isprint ((unsigned char)c))
    87	#define ISUPPER(c)	(IN_CTYPE_DOMAIN (c) && isupper ((unsigned char)c))
    88	#define ISXDIGIT(c)	(IN_CTYPE_DOMAIN (c) && isxdigit ((unsigned char)c))
    89	
    90	#define _rl_lowercase_p(c)	(NON_NEGATIVE(c) && ISLOWER(c))
    91	#define _rl_uppercase_p(c)	(NON_NEGATIVE(c) && ISUPPER(c))
    92	#define _rl_digit_p(c)		((c) >= '0' && (c) <= '9')
    93	
    94	#define _rl_alphabetic_p(c)	(NON_NEGATIVE(c) && ISALNUM(c))
    95	#define _rl_pure_alphabetic(c)	(NON_NEGATIVE(c) && ISALPHA(c))
    96	
    97	#ifndef _rl_to_upper
    98	#  define _rl_to_upper(c) (_rl_lowercase_p(c) ? toupper((unsigned char)(c)) : (c))
    99	#  define _rl_to_lower(c) (_rl_uppercase_p(c) ? tolower((unsigned char)(c)) : (c))
   100	#endif
   101	
   102	#ifndef _rl_digit_value
   103	#  define _rl_digit_value(x) ((x) - '0')
   104	#endif
   105	
   106	#ifndef _rl_isident
   107	#  define _rl_isident(c) (ISALNUM(c) || (c) == '_')
   108	#endif
   109	
   110	#ifndef ISOCTAL
   111	#  define ISOCTAL(c)	((c) >= '0' && (c) <= '7')
   112	#endif
   113	#define OCTVALUE(c)	((c) - '0')
   114	
   115	#define HEXVALUE(c) \
   116	  (((c) >= 'a' && (c) <= 'f') \
   117	  	? (c)-'a'+10 \
   118	  	: (c) >= 'A' && (c) <= 'F' ? (c)-'A'+10 : (c)-'0')
   119	
   120	#ifndef NEWLINE
   121	#define NEWLINE '\n'
   122	#endif
   123	
   124	#ifndef RETURN
   125	#define RETURN CTRL('M')
   126	#endif
   127	
   128	#ifndef RUBOUT
   129	#define RUBOUT 0x7f
   130	#endif
   131	
   132	#ifndef TAB
   133	#define TAB '\t'
   134	#endif
   135	
   136	#ifdef ABORT_CHAR
   137	#undef ABORT_CHAR
   138	#endif
   139	#define ABORT_CHAR CTRL('G')
   140	
   141	#ifdef PAGE
   142	#undef PAGE
   143	#endif
   144	#define PAGE CTRL('L')
   145	
   146	#ifdef SPACE
   147	#undef SPACE
   148	#endif
   149	#define SPACE ' '	/* XXX - was 0x20 */
   150	
   151	#ifdef ESC
   152	#undef ESC
   153	#endif
   154	#define ESC CTRL('[')
   155	
   156	#endif  /* _CHARDEFS_H_ */