readline/chardefs.h

   1 /* chardefs.h -- Character definitions for readline. */
   2
   3 /* Copyright (C) 1994 Free Software Foundation, Inc.
   4
   5    This file is part of the GNU Readline Library, a library for
   6    reading lines of text with interactive input and history editing.
   7
   8    The GNU Readline Library is free software; you can redistribute it
   9    and/or modify it under the terms of the GNU General Public License
  10    as published by the Free Software Foundation; either version 2, or
  11    (at your option) any later version.
  12
  13    The GNU Readline Library is distributed in the hope that it will be
  14    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  15    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    The GNU General Public License is often shipped with GNU software, and
  19    is generally kept in a file called COPYING or LICENSE.  If you do not
  20    have a copy of the license, write to the Free Software Foundation,
  21    59 Temple Place, Suite 330, Boston, MA 02111 USA. */
  22
  23 #ifndef _CHARDEFS_H_
  24 #define _CHARDEFS_H_
  25
  26 #include <ctype.h>
  27
  28 #if defined (HAVE_CONFIG_H)
  29 #  if defined (HAVE_STRING_H)
  30 #    if ! defined (STDC_HEADERS) && defined (HAVE_MEMORY_H)
  31 #      include <memory.h>
  32 #    endif
  33 #    include <string.h>
  34 #  endif /* HAVE_STRING_H */
  35 #  if defined (HAVE_STRINGS_H)
  36 #    include <strings.h>
  37 #  endif /* HAVE_STRINGS_H */
  38 #else
  39 #  include <string.h>
  40 #endif /* !HAVE_CONFIG_H */
  41
  42 #ifndef whitespace
  43 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
  44 #endif
  45
  46 #ifdef CTRL
  47 #  undef CTRL
  48 #endif
  49 #ifdef UNCTRL
  50 #  undef UNCTRL
  51 #endif
  52
  53 /* Some character stuff. */
  54 #define control_character_threshold 0x020   /* Smaller than this is control. */
  55 #define control_character_mask 0x1f         /* 0x20 - 1 */
  56 #define meta_character_threshold 0x07f      /* Larger than this is Meta. */
  57 #define control_character_bit 0x40          /* 0x000000, must be off. */
  58 #define meta_character_bit 0x080            /* x0000000, must be on. */
  59 #define largest_char 255                    /* Largest character value. */
  60
  61 #define CTRL_CHAR(c) ((c) < control_character_threshold && (((c) & 0x80) == 0))
  62 #define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
  63
  64 #define CTRL(c) ((c) & control_character_mask)
  65 #define META(c) ((c) | meta_character_bit)
  66
  67 #define UNMETA(c) ((c) & (~meta_character_bit))
  68 #define UNCTRL(c) _rl_to_upper(((c)|control_character_bit))
  69
  70 #if defined STDC_HEADERS || (!defined (isascii) && !defined (HAVE_ISASCII))
  71 #  define IN_CTYPE_DOMAIN(c) 1
  72 #else
  73 #  define IN_CTYPE_DOMAIN(c) isascii(c)
  74 #endif
  75
  76 #if !defined (isxdigit) && !defined (HAVE_ISXDIGIT)
  77 #  define isxdigit(c)   (isdigit((c)) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
  78 #endif
  79
  80 #define NON_NEGATIVE(c) ((unsigned char)(c) == (c))
  81
  82 /* Some systems define these; we want our definitions. */
  83 #undef ISPRINT
  84
  85 #define ISALNUM(c)      (IN_CTYPE_DOMAIN (c) && isalnum (c))
  86 #define ISALPHA(c)      (IN_CTYPE_DOMAIN (c) && isalpha (c))
  87 #define ISDIGIT(c)      (IN_CTYPE_DOMAIN (c) && isdigit (c))
  88 #define ISLOWER(c)      (IN_CTYPE_DOMAIN (c) && islower (c))
  89 #define ISPRINT(c)      (IN_CTYPE_DOMAIN (c) && isprint (c))
  90 #define ISUPPER(c)      (IN_CTYPE_DOMAIN (c) && isupper (c))
  91 #define ISXDIGIT(c)     (IN_CTYPE_DOMAIN (c) && isxdigit (c))
  92
  93 #define _rl_lowercase_p(c)      (NON_NEGATIVE(c) && ISLOWER(c))
  94 #define _rl_uppercase_p(c)      (NON_NEGATIVE(c) && ISUPPER(c))
  95 #define _rl_digit_p(c)          ((c) >= '0' && (c) <= '9')
  96
  97 #define _rl_pure_alphabetic(c)  (NON_NEGATIVE(c) && ISALPHA(c))
  98 #define ALPHABETIC(c)           (NON_NEGATIVE(c) && ISALNUM(c))
  99
 100 #ifndef _rl_to_upper
 101 #  define _rl_to_upper(c) (_rl_lowercase_p(c) ? toupper((unsigned char)c) : (c))
 102 #  define _rl_to_lower(c) (_rl_uppercase_p(c) ? tolower((unsigned char)c) : (c))
 103 #endif
 104
 105 #ifndef _rl_digit_value
 106 #  define _rl_digit_value(x) ((x) - '0')
 107 #endif
 108
 109 #ifndef _rl_isident
 110 #  define _rl_isident(c) (ISALNUM(c) || (c) == '_')
 111 #endif
 112
 113 #ifndef ISOCTAL
 114 #  define ISOCTAL(c)    ((c) >= '0' && (c) <= '7')
 115 #endif
 116 #define OCTVALUE(c)     ((c) - '0')
 117
 118 #define HEXVALUE(c) \
 119   (((c) >= 'a' && (c) <= 'f') \
 120         ? (c)-'a'+10 \
 121         : (c) >= 'A' && (c) <= 'F' ? (c)-'A'+10 : (c)-'0')
 122
 123 #ifndef NEWLINE
 124 #define NEWLINE '\n'
 125 #endif
 126
 127 #ifndef RETURN
 128 #define RETURN CTRL('M')
 129 #endif
 130
 131 #ifndef RUBOUT
 132 #define RUBOUT 0x7f
 133 #endif
 134
 135 #ifndef TAB
 136 #define TAB '\t'
 137 #endif
 138
 139 #ifdef ABORT_CHAR
 140 #undef ABORT_CHAR
 141 #endif
 142 #define ABORT_CHAR CTRL('G')
 143
 144 #ifdef PAGE
 145 #undef PAGE
 146 #endif
 147 #define PAGE CTRL('L')
 148
 149 #ifdef SPACE
 150 #undef SPACE
 151 #endif
 152 #define SPACE ' '       /* XXX - was 0x20 */
 153
 154 #ifdef ESC
 155 #undef ESC
 156 #endif
 157 #define ESC CTRL('[')
 158
 159 #endif  /* _CHARDEFS_H_ */