src/include/ctype.h

   1 #ifndef _CTYPE_H
   2 #define _CTYPE_H
   3
   4 /** @file
   5  *
   6  * Character types
   7  */
   8
   9 FILE_LICENCE ( GPL2_OR_LATER );
  10
  11 #define isdigit(c)      ((c) >= '0' && (c) <= '9')
  12 #define islower(c)      ((c) >= 'a' && (c) <= 'z')
  13 #define isupper(c)      ((c) >= 'A' && (c) <= 'Z')
  14
  15 static inline unsigned char tolower(unsigned char c)
  16 {
  17         if (isupper(c))
  18                 c -= 'A'-'a';
  19         return c;
  20 }
  21
  22 static inline unsigned char toupper(unsigned char c)
  23 {
  24         if (islower(c))
  25                 c -= 'a'-'A';
  26         return c;
  27 }
  28
  29 extern int isspace ( int c );
  30
  31 #endif /* _CTYPE_H */