readline/chardefs.h

   1 /* chardefs.h -- Character definitions for readline. */
   2 #ifndef _CHARDEFS_
   3 #define _CHARDEFS_
   4
   5 #include <ctype.h>
   6
   7 #ifndef savestring
   8 #define savestring(X) _rl_savestring(X)
   9 extern char * _rl_savestring ();
  10 #endif
  11
  12 #ifndef whitespace
  13 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
  14 #endif
  15
  16 #ifdef CTRL
  17 #undef CTRL
  18 #endif
  19
  20 /* Some character stuff. */
  21 #define control_character_threshold 0x020   /* Smaller than this is control. */
  22 #define meta_character_threshold 0x07f      /* Larger than this is Meta. */
  23 #define control_character_bit 0x40          /* 0x000000, must be off. */
  24 #define meta_character_bit 0x080            /* x0000000, must be on. */
  25 #define largest_char 255                    /* Largest character value. */
  26
  27 #define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
  28 #define CTRL(c) ((c) & (~control_character_bit))
  29 #define META(c) ((c) | meta_character_bit)
  30
  31 #define UNMETA(c) ((c) & (~meta_character_bit))
  32 #define UNCTRL(c) to_upper(((c)|control_character_bit))
  33
  34 #define lowercase_p(c) (((c) > ('a' - 1) && (c) < ('z' + 1)))
  35 #define uppercase_p(c) (((c) > ('A' - 1) && (c) < ('Z' + 1)))
  36
  37 #define pure_alphabetic(c) (lowercase_p(c) || uppercase_p(c))
  38
  39 #ifndef to_upper
  40 #define to_upper(c) (lowercase_p(c) ? ((c) - 32) : (c))
  41 #define to_lower(c) (uppercase_p(c) ? ((c) + 32) : (c))
  42 #endif
  43
  44 #define CTRL_P(c) ((c) < control_character_threshold)
  45 #define META_P(c) ((c) > meta_character_threshold)
  46
  47 #ifndef NEWLINE
  48 #define NEWLINE '\n'
  49 #endif
  50
  51 #ifndef RETURN
  52 #define RETURN CTRL('M')
  53 #endif
  54
  55 #ifndef RUBOUT
  56 #define RUBOUT 0x07f
  57 #endif
  58
  59 #ifndef TAB
  60 #define TAB '\t'
  61 #endif
  62
  63 #ifdef ABORT_CHAR
  64 #undef ABORT_CHAR
  65 #endif
  66 #define ABORT_CHAR CTRL('G')
  67
  68 #ifdef PAGE
  69 #undef PAGE
  70 #endif
  71 #define PAGE CTRL('L')
  72
  73 #ifdef SPACE
  74 #undef SPACE
  75 #endif
  76 #define SPACE 0x020
  77
  78 #ifdef ESC
  79 #undef ESC
  80 #endif
  81
  82 #define ESC CTRL('[')
  83
  84 #endif  /* _CHARDEFS_ */