com32/include/ctype.h

   1 /*
   2  * ctype.h
   3  *
   4  * This assumes ISO 8859-1, being a reasonable superset of ASCII.
   5  */
   6
   7 #ifndef _CTYPE_H
   8 #define _CTYPE_H
   9
  10 #ifndef __CTYPE_NO_INLINE
  11 # define __ctype_inline extern __inline__
  12 #else
  13 # define __ctype_inline
  14 #endif
  15
  16 /*
  17  * This relies on the following definitions:
  18  *
  19  * cntrl = !print
  20  * alpha = upper|lower
  21  * graph = punct|alpha|digit
  22  * blank = '\t' || ' ' (per POSIX requirement)
  23  */
  24 enum {
  25   __ctype_upper  = (1 << 0),
  26   __ctype_lower  = (1 << 1),
  27   __ctype_digit  = (1 << 2),
  28   __ctype_xdigit = (1 << 3),
  29   __ctype_space  = (1 << 4),
  30   __ctype_print  = (1 << 5),
  31   __ctype_punct  = (1 << 6),
  32   __ctype_cntrl  = (1 << 7),
  33 };
  34
  35 extern const unsigned char __ctypes[];
  36
  37 __ctype_inline int isalnum(int __c)
  38 {
  39   return __ctypes[__c+1] &
  40     (__ctype_upper|__ctype_lower|__ctype_digit);
  41 }
  42
  43 __ctype_inline int isalpha(int __c)
  44 {
  45   return __ctypes[__c+1] &
  46     (__ctype_upper|__ctype_lower);
  47 }
  48
  49 __ctype_inline int isascii(int __c)
  50 {
  51   return !(__c & ~0x7f);
  52 }
  53
  54 __ctype_inline int isblank(int __c)
  55 {
  56   return (__c == '\t') || (__c == ' ');
  57 }
  58
  59 __ctype_inline int iscntrl(int __c)
  60 {
  61   return __ctypes[__c+1] & __ctype_cntrl;
  62 }
  63
  64 __ctype_inline int isdigit(int __c)
  65 {
  66   return ((unsigned)__c - '0') <= 9;
  67 }
  68
  69 __ctype_inline int isgraph(int __c)
  70 {
  71   return __ctypes[__c+1] &
  72     (__ctype_upper|__ctype_lower|__ctype_digit|__ctype_punct);
  73 }
  74
  75 __ctype_inline int islower(int __c)
  76 {
  77   return __ctypes[__c+1] & __ctype_lower;
  78 }
  79
  80 __ctype_inline int isprint(int __c)
  81 {
  82   return __ctypes[__c+1] & __ctype_print;
  83 }
  84
  85 __ctype_inline int ispunct(int __c)
  86 {
  87   return __ctypes[__c+1] & __ctype_punct;
  88 }
  89
  90 __ctype_inline int isspace(int __c)
  91 {
  92   return __ctypes[__c+1] & __ctype_space;
  93 }
  94
  95 __ctype_inline int isupper(int __c)
  96 {
  97   return __ctypes[__c+1] & __ctype_upper;
  98 }
  99
 100 __ctype_inline int isxdigit(int __c)
 101 {
 102   return __ctypes[__c+1] & __ctype_xdigit;
 103 }
 104
 105 /* Note: this is decimal, not hex, to avoid accidental promotion to unsigned */
 106 #define _toupper(__c) ((__c) & ~32)
 107 #define _tolower(__c) ((__c) | 32)
 108
 109 __ctype_inline int toupper(int __c)
 110 {
 111   return islower(__c) ? _toupper(__c) : __c;
 112 }
 113
 114 __ctype_inline int tolower(int __c)
 115 {
 116   return isupper(__c) ? _tolower(__c) : __c;
 117 }
 118
 119 #endif /* _CTYPE_H */