readline/chardefs.h

   1 /* chardefs.h -- Character definitions for readline. */
   2 #ifndef _CHARDEFS_
   3
   4 #ifndef savestring
   5 #define savestring(x) (char *)strcpy (xmalloc (1 + strlen (x)), (x))
   6 #endif
   7
   8 #ifndef whitespace
   9 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
  10 #endif
  11
  12 #ifdef CTRL
  13 #undef CTRL
  14 #endif
  15
  16 /* Some character stuff. */
  17 #define control_character_threshold 0x020   /* smaller than this is control */
  18 #define meta_character_threshold 0x07f      /* larger than this is Meta. */
  19 #define control_character_bit 0x40          /* 0x000000, must be off. */
  20 #define meta_character_bit 0x080            /* x0000000, must be on. */
  21
  22 #define CTRL(c) ((c) & (~control_character_bit))
  23 #define META(c) ((c) | meta_character_bit)
  24
  25 #define UNMETA(c) ((c) & (~meta_character_bit))
  26 #define UNCTRL(c) to_upper(((c)|control_character_bit))
  27
  28 #define lowercase_p(c) (((c) > ('a' - 1) && (c) < ('z' + 1)))
  29 #define uppercase_p(c) (((c) > ('A' - 1) && (c) < ('Z' + 1)))
  30
  31 #define pure_alphabetic(c) (lowercase_p(c) || uppercase_p(c))
  32
  33 #ifndef to_upper
  34 #define to_upper(c) (lowercase_p(c) ? ((c) - 32) : (c))
  35 #define to_lower(c) (uppercase_p(c) ? ((c) + 32) : (c))
  36 #endif
  37
  38 #define CTRL_P(c) ((c) < control_character_threshold)
  39 #define META_P(c) ((c) > meta_character_threshold)
  40
  41 #define NEWLINE '\n'
  42 #define RETURN CTRL('M')
  43 #define RUBOUT 0x07f
  44 #define TAB '\t'
  45 #define ABORT_CHAR CTRL('G')
  46 #define PAGE CTRL('L')
  47 #define SPACE 0x020
  48 #define ESC CTRL('[')
  49
  50 #endif  /* _CHARDEFS_ */