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readline 8.1

    1: /* chardefs.h -- Character definitions for readline. */
    2: 
    3: /* Copyright (C) 1994-2015 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: #if defined (HAVE_CONFIG_H)
   28: #  if defined (HAVE_STRING_H)
   29: #    if ! defined (STDC_HEADERS) && defined (HAVE_MEMORY_H)
   30: #      include <memory.h>
   31: #    endif
   32: #    include <string.h>
   33: #  endif /* HAVE_STRING_H */
   34: #  if defined (HAVE_STRINGS_H)
   35: #    include <strings.h>
   36: #  endif /* HAVE_STRINGS_H */
   37: #else
   38: #  include <string.h>
   39: #endif /* !HAVE_CONFIG_H */
   40: 
   41: #ifndef whitespace
   42: #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
   43: #endif
   44: 
   45: #ifdef CTRL
   46: #  undef CTRL
   47: #endif
   48: #ifdef UNCTRL
   49: #  undef UNCTRL
   50: #endif
   51: 
   52: /* Some character stuff. */
   53: #define control_character_threshold 0x020   /* Smaller than this is control. */
   54: #define control_character_mask 0x1f	    /* 0x20 - 1 */
   55: #define meta_character_threshold 0x07f	    /* Larger than this is Meta. */
   56: #define control_character_bit 0x40	    /* 0x000000, must be off. */
   57: #define meta_character_bit 0x080	    /* x0000000, must be on. */
   58: #define largest_char 255		    /* Largest character value. */
   59: 
   60: #define CTRL_CHAR(c) ((c) < control_character_threshold && (((c) & 0x80) == 0))
   61: #define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
   62: 
   63: #define CTRL(c) ((c) & control_character_mask)
   64: #define META(c) ((c) | meta_character_bit)
   65: 
   66: #define UNMETA(c) ((c) & (~meta_character_bit))
   67: #define UNCTRL(c) _rl_to_upper(((c)|control_character_bit))
   68: 
   69: #if defined STDC_HEADERS || (!defined (isascii) && !defined (HAVE_ISASCII))
   70: #  define IN_CTYPE_DOMAIN(c) 1
   71: #else
   72: #  define IN_CTYPE_DOMAIN(c) isascii(c)
   73: #endif
   74: 
   75: #if !defined (isxdigit) && !defined (HAVE_ISXDIGIT) && !defined (__cplusplus)
   76: #  define isxdigit(c)   (isdigit((unsigned char)(c)) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
   77: #endif
   78: 
   79: #if defined (CTYPE_NON_ASCII)
   80: #  define NON_NEGATIVE(c) 1
   81: #else
   82: #  define NON_NEGATIVE(c) ((unsigned char)(c) == (c))
   83: #endif
   84: 
   85: /* Some systems define these; we want our definitions. */
   86: #undef ISPRINT
   87: 
   88: /* Beware:  these only work with single-byte ASCII characters. */
   89: 
   90: #define ISALNUM(c)	(IN_CTYPE_DOMAIN (c) && isalnum ((unsigned char)c))
   91: #define ISALPHA(c)	(IN_CTYPE_DOMAIN (c) && isalpha ((unsigned char)c))
   92: #define ISDIGIT(c)	(IN_CTYPE_DOMAIN (c) && isdigit ((unsigned char)c))
   93: #define ISLOWER(c)	(IN_CTYPE_DOMAIN (c) && islower ((unsigned char)c))
   94: #define ISPRINT(c)	(IN_CTYPE_DOMAIN (c) && isprint ((unsigned char)c))
   95: #define ISUPPER(c)	(IN_CTYPE_DOMAIN (c) && isupper ((unsigned char)c))
   96: #define ISXDIGIT(c)	(IN_CTYPE_DOMAIN (c) && isxdigit ((unsigned char)c))
   97: 
   98: #define _rl_lowercase_p(c)	(NON_NEGATIVE(c) && ISLOWER(c))
   99: #define _rl_uppercase_p(c)	(NON_NEGATIVE(c) && ISUPPER(c))
  100: #define _rl_digit_p(c)		((c) >= '0' && (c) <= '9')
  101: 
  102: #define _rl_pure_alphabetic(c)	(NON_NEGATIVE(c) && ISALPHA(c))
  103: #define ALPHABETIC(c)		(NON_NEGATIVE(c) && ISALNUM(c))
  104: 
  105: #ifndef _rl_to_upper
  106: #  define _rl_to_upper(c) (_rl_lowercase_p(c) ? toupper((unsigned char)c) : (c))
  107: #  define _rl_to_lower(c) (_rl_uppercase_p(c) ? tolower((unsigned char)c) : (c))
  108: #endif
  109: 
  110: #ifndef _rl_digit_value
  111: #  define _rl_digit_value(x) ((x) - '0')
  112: #endif
  113: 
  114: #ifndef _rl_isident
  115: #  define _rl_isident(c) (ISALNUM(c) || (c) == '_')
  116: #endif
  117: 
  118: #ifndef ISOCTAL
  119: #  define ISOCTAL(c)	((c) >= '0' && (c) <= '7')
  120: #endif
  121: #define OCTVALUE(c)	((c) - '0')
  122: 
  123: #define HEXVALUE(c) \
  124:   (((c) >= 'a' && (c) <= 'f') \
  125:   	? (c)-'a'+10 \
  126:   	: (c) >= 'A' && (c) <= 'F' ? (c)-'A'+10 : (c)-'0')
  127: 
  128: #ifndef NEWLINE
  129: #define NEWLINE '\n'
  130: #endif
  131: 
  132: #ifndef RETURN
  133: #define RETURN CTRL('M')
  134: #endif
  135: 
  136: #ifndef RUBOUT
  137: #define RUBOUT 0x7f
  138: #endif
  139: 
  140: #ifndef TAB
  141: #define TAB '\t'
  142: #endif
  143: 
  144: #ifdef ABORT_CHAR
  145: #undef ABORT_CHAR
  146: #endif
  147: #define ABORT_CHAR CTRL('G')
  148: 
  149: #ifdef PAGE
  150: #undef PAGE
  151: #endif
  152: #define PAGE CTRL('L')
  153: 
  154: #ifdef SPACE
  155: #undef SPACE
  156: #endif
  157: #define SPACE ' '	/* XXX - was 0x20 */
  158: 
  159: #ifdef ESC
  160: #undef ESC
  161: #endif
  162: #define ESC CTRL('[')
  163: 
  164: #endif  /* _CHARDEFS_H_ */