readline/chardefs.h

   1 /* chardefs.h -- Character definitions for readline. */
   2 #ifndef _CHARDEFS_
   3 #define _CHARDEFS_
   4
   5 #include <ctype.h>
   6
   7 #if 0
   8 /* Getting the correct definition of HAVE_STRING_H is harder than just
   9    declaring them ourselves.  CYGNUS LOCAL.  */
  10 #if defined (HAVE_STRING_H)
  11 #  include <string.h>
  12 #else
  13 #  include <strings.h>
  14 #endif /* HAVE_STRING_H */
  15 #else /* not 0 */
  16 /* We don't worry about declaring functions where we don't use the return
  17    value (e.g. strcpy) or which return int.  */
  18 extern char *strrchr ();
  19 #endif /* not 0 */
  20
  21 #ifndef savestring
  22 #if 0
  23
  24 /* CYGNUS LOCAL--this declaration loses if xmalloc has already been
  25    declared as void *xmalloc (), as in GDB.  The whole concept of
  26    readline using xmalloc rather than just returning NULL when it runs
  27    out of memory is questionable, but if we do want xmalloc we need a
  28    better way to declare it (e.g. the client declares it, or the client
  29    calls a rl_register_xmalloc function analagous to the way signal()
  30    works.  */
  31
  32 extern char *xmalloc ();
  33 #endif
  34 #  ifndef strcpy
  35 extern char *strcpy ();
  36 #  endif
  37 #define savestring(x) strcpy (xmalloc (1 + strlen (x)), (x))
  38 #endif
  39
  40 #ifndef whitespace
  41 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
  42 #endif
  43
  44 #ifdef CTRL
  45 #undef CTRL
  46 #endif
  47
  48 /* Some character stuff. */
  49 #define control_character_threshold 0x020   /* Smaller than this is control. */
  50 #define meta_character_threshold 0x07f      /* Larger than this is Meta. */
  51 #define control_character_bit 0x40          /* 0x000000, must be off. */
  52 #define meta_character_bit 0x080            /* x0000000, must be on. */
  53 #define largest_char 255                    /* Largest character value. */
  54
  55 #define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
  56 #define CTRL(c) ((c) & (~control_character_bit))
  57 #define META(c) ((c) | meta_character_bit)
  58
  59 #define UNMETA(c) ((c) & (~meta_character_bit))
  60 #define UNCTRL(c) to_upper(((c)|control_character_bit))
  61
  62 #define lowercase_p(c) (((c) > ('a' - 1) && (c) < ('z' + 1)))
  63 #define uppercase_p(c) (((c) > ('A' - 1) && (c) < ('Z' + 1)))
  64
  65 #define pure_alphabetic(c) (lowercase_p(c) || uppercase_p(c))
  66
  67 #ifndef to_upper
  68 #define to_upper(c) (lowercase_p(c) ? ((c) - 32) : (c))
  69 #define to_lower(c) (uppercase_p(c) ? ((c) + 32) : (c))
  70 #endif
  71
  72 #define CTRL_P(c) ((c) < control_character_threshold)
  73 #define META_P(c) ((c) > meta_character_threshold)
  74
  75 #ifndef NEWLINE
  76 #define NEWLINE '\n'
  77 #endif
  78
  79 #ifndef RETURN
  80 #define RETURN CTRL('M')
  81 #endif
  82
  83 #ifndef RUBOUT
  84 #define RUBOUT 0x07f
  85 #endif
  86
  87 #ifndef TAB
  88 #define TAB '\t'
  89 #endif
  90
  91 #ifdef ABORT_CHAR
  92 #undef ABORT_CHAR
  93 #endif
  94 #define ABORT_CHAR CTRL('G')
  95
  96 #ifdef PAGE
  97 #undef PAGE
  98 #endif
  99 #define PAGE CTRL('L')
 100
 101 #ifdef SPACE
 102 #undef SPACE
 103 #endif
 104 #define SPACE 0x020
 105
 106 #ifdef ESC
 107 #undef ESC
 108 #endif
 109
 110 #define ESC CTRL('[')
 111
 112 #endif  /* _CHARDEFS_ */