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 #    include <string.h>
  31 #  else
  32 #    include <strings.h>
  33 #  endif /* HAVE_STRING_H */
  34 #else
  35 #  include <string.h>
  36 #endif /* !HAVE_CONFIG_H */
  37
  38 #ifndef whitespace
  39 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
  40 #endif
  41
  42 #ifdef CTRL
  43 #undef CTRL
  44 #endif
  45
  46 /* Some character stuff. */
  47 #define control_character_threshold 0x020   /* Smaller than this is control. */
  48 #define control_character_mask 0x1f         /* 0x20 - 1 */
  49 #define meta_character_threshold 0x07f      /* Larger than this is Meta. */
  50 #define control_character_bit 0x40          /* 0x000000, must be off. */
  51 #define meta_character_bit 0x080            /* x0000000, must be on. */
  52 #define largest_char 255                    /* Largest character value. */
  53
  54 #define CTRL_CHAR(c) ((c) < control_character_threshold && (c) >= 0)
  55 #define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
  56
  57 #define CTRL(c) ((c) & control_character_mask)
  58 #define META(c) ((c) | meta_character_bit)
  59
  60 #define UNMETA(c) ((c) & (~meta_character_bit))
  61 #define UNCTRL(c) _rl_to_upper(((c)|control_character_bit))
  62
  63 /* Old versions
  64 #define _rl_lowercase_p(c) (((c) > ('a' - 1) && (c) < ('z' + 1)))
  65 #define _rl_uppercase_p(c) (((c) > ('A' - 1) && (c) < ('Z' + 1)))
  66 #define _rl_digit_p(c)  ((c) >= '0' && (c) <= '9')
  67 */
  68
  69 #define _rl_lowercase_p(c) (islower(c))
  70 #define _rl_uppercase_p(c) (isupper(c))
  71 #define _rl_digit_p(x)  (isdigit (x))
  72
  73 #define _rl_pure_alphabetic(c) (_rl_lowercase_p(c) || _rl_uppercase_p(c))
  74 #define ALPHABETIC(c)   (_rl_lowercase_p(c) || _rl_uppercase_p(c) || _rl_digit_p(c))
  75
  76 /* Old versions
  77 #  define _rl_to_upper(c) (_rl_lowercase_p(c) ? ((c) - 32) : (c))
  78 #  define _rl_to_lower(c) (_rl_uppercase_p(c) ? ((c) + 32) : (c))
  79 */
  80
  81 #ifndef _rl_to_upper
  82 #  define _rl_to_upper(c) (islower(c) ? toupper(c) : (c))
  83 #  define _rl_to_lower(c) (isupper(c) ? tolower(c) : (c))
  84 #endif
  85
  86 #ifndef _rl_digit_value
  87 #define _rl_digit_value(x) ((x) - '0')
  88 #endif
  89
  90 #ifndef NEWLINE
  91 #define NEWLINE '\n'
  92 #endif
  93
  94 #ifndef RETURN
  95 #define RETURN CTRL('M')
  96 #endif
  97
  98 #ifndef RUBOUT
  99 #define RUBOUT 0x7f
 100 #endif
 101
 102 #ifndef TAB
 103 #define TAB '\t'
 104 #endif
 105
 106 #ifdef ABORT_CHAR
 107 #undef ABORT_CHAR
 108 #endif
 109 #define ABORT_CHAR CTRL('G')
 110
 111 #ifdef PAGE
 112 #undef PAGE
 113 #endif
 114 #define PAGE CTRL('L')
 115
 116 #ifdef SPACE
 117 #undef SPACE
 118 #endif
 119 #define SPACE ' '       /* XXX - was 0x20 */
 120
 121 #ifdef ESC
 122 #undef ESC
 123 #endif
 124 #define ESC CTRL('[')
 125
 126 #ifndef ISOCTAL
 127 #define ISOCTAL(c)      ((c) >= '0' && (c) <= '7')
 128 #endif
 129 #define OCTVALUE(c)     ((c) - '0')
 130
 131 #ifndef isxdigit
 132 #  define isxdigit(c)   (isdigit((c)) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
 133 #endif
 134
 135 #define HEXVALUE(c) \
 136   (((c) >= 'a' && (c) <= 'f') \
 137         ? (c)-'a'+10 \
 138         : (c) >= 'A' && (c) <= 'F' ? (c)-'A'+10 : (c)-'0')
 139
 140 #endif  /* _CHARDEFS_H_ */