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C/C++ Source or Header  |  1992-04-09  |  1KB  |  41 lines
  1. /* ctype.h */
  2.  
  3. /* This file contains macros definitions and extern declarations for a
  4.  * version of <ctype.h> which is aware of the o_flipcase letters used in
  5.  * elvis.
  6.  *
  7.  * This file uses the "uchar" data type and "UCHAR" conversion macro which
  8.  * are defined in "config.h".  Consequently, any file that includes this
  9.  * header must include config.h first.
  10.  */
  11.  
  12. #ifndef _CT_UPPER
  13.  
  14. #define _CT_UPPER    0x01
  15. #define _CT_LOWER    0x02
  16. #define _CT_SPACE    0x04
  17. #define _CT_DIGIT    0x08
  18. #define _CT_ALNUM    0x10
  19. #define _CT_CNTRL    0x20
  20.  
  21. #define isalnum(c)    (_ct_ctypes[UCHAR(c)] & _CT_ALNUM)
  22. #define isalpha(c)    (_ct_ctypes[UCHAR(c)] & (_CT_LOWER|_CT_UPPER))
  23. #define isdigit(c)    (_ct_ctypes[UCHAR(c)] & _CT_DIGIT)
  24. #define islower(c)    (_ct_ctypes[UCHAR(c)] & _CT_LOWER)
  25. #define isspace(c)    (_ct_ctypes[UCHAR(c)] & _CT_SPACE)
  26. #define isupper(c)    (_ct_ctypes[UCHAR(c)] & _CT_UPPER)
  27. #define iscntrl(c)    (_ct_ctypes[UCHAR(c)] & _CT_CNTRL)
  28. #define ispunct(c)    (!_ct_ctypes[UCHAR(c)]) /* punct = "none of the above" */
  29.  
  30. #define isascii(c)    (!((c) & 0x80))
  31.  
  32. #define toupper(c)    _ct_toupper[UCHAR(c)]
  33. #define tolower(c)    _ct_tolower[UCHAR(c)]
  34.  
  35. extern uchar    _ct_toupper[];
  36. extern uchar    _ct_tolower[];
  37. extern uchar    _ct_ctypes[];
  38. extern void    _ct_init(/* char *flipcase */);
  39.  
  40. #endif /* ndef _CT_UPPER */
  41.