readline/chardefs.h

   1 /* chardefs.h -- Character definitions for readline. */
   2
   3 /* Copyright (C) 1994-2009 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)
  76 #  define isxdigit(c)   (isdigit((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 (c))
  91 #define ISALPHA(c)      (IN_CTYPE_DOMAIN (c) && isalpha (c))
  92 #define ISDIGIT(c)      (IN_CTYPE_DOMAIN (c) && isdigit (c))
  93 #define ISLOWER(c)      (IN_CTYPE_DOMAIN (c) && islower (c))
  94 #define ISPRINT(c)      (IN_CTYPE_DOMAIN (c) && isprint (c))
  95 #define ISUPPER(c)      (IN_CTYPE_DOMAIN (c) && isupper (c))
  96 #define ISXDIGIT(c)     (IN_CTYPE_DOMAIN (c) && isxdigit (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_ */