src/include/ctype.h

   1 #ifndef _CTYPE_H
   2 #define _CTYPE_H
   3
   4 /** @file
   5  *
   6  * Character types
   7  *
   8  */
   9
  10 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
  11
  12 /**
  13  * Check if character is a decimal digit
  14  *
  15  * @v character         ASCII character
  16  * @ret is_digit        Character is a decimal digit
  17  */
  18 static inline int isdigit ( int character ) {
  19
  20         return ( ( character >= '0' ) && ( character <= '9' ) );
  21 }
  22
  23 /**
  24  * Check if character is a hexadecimal digit
  25  *
  26  * @v character         ASCII character
  27  * @ret is_xdigit       Character is a hexadecimal digit
  28  */
  29 static inline int isxdigit ( int character ) {
  30
  31         return ( ( ( character >= '0' ) && ( character <= '9' ) ) ||
  32                  ( ( character >= 'A' ) && ( character <= 'F' ) ) ||
  33                  ( ( character >= 'a' ) && ( character <= 'f' ) ) );
  34 }
  35
  36 /**
  37  * Check if character is an upper-case letter
  38  *
  39  * @v character         ASCII character
  40  * @ret is_upper        Character is an upper-case letter
  41  */
  42 static inline int isupper ( int character ) {
  43
  44         return ( ( character >= 'A' ) && ( character <= 'Z' ) );
  45 }
  46
  47 /**
  48  * Check if character is a lower-case letter
  49  *
  50  * @v character         ASCII character
  51  * @ret is_lower        Character is a lower-case letter
  52  */
  53 static inline int islower ( int character ) {
  54
  55         return ( ( character >= 'a' ) && ( character <= 'z' ) );
  56 }
  57
  58 /**
  59  * Check if character is alphabetic
  60  *
  61  * @v character         ASCII character
  62  * @ret is_alpha        Character is alphabetic
  63  */
  64 static inline int isalpha ( int character ) {
  65
  66         return ( isupper ( character ) || islower ( character ) );
  67 }
  68
  69 /**
  70  * Check if character is alphanumeric
  71  *
  72  * @v character         ASCII character
  73  * @ret is_alnum        Character is alphanumeric
  74  */
  75 static inline int isalnum ( int character ) {
  76
  77         return ( isalpha ( character ) || isdigit ( character ) );
  78 }
  79
  80 /**
  81  * Check if character is printable
  82  *
  83  * @v character         ASCII character
  84  * @ret is_print        Character is printable
  85  */
  86 static inline int isprint ( int character ) {
  87
  88         return ( ( character >= ' ' ) && ( character <= '~' ) );
  89 }
  90
  91 /**
  92  * Convert character to lower case
  93  *
  94  * @v character         Character
  95  * @v character         Lower-case character
  96  */
  97 static inline int tolower ( int character ) {
  98
  99         return ( isupper ( character ) ?
 100                  ( character - 'A' + 'a' ) : character );
 101 }
 102
 103 /**
 104  * Convert character to upper case
 105  *
 106  * @v character         Character
 107  * @v character         Upper-case character
 108  */
 109 static inline int toupper ( int character ) {
 110
 111         return ( islower ( character ) ?
 112                  ( character - 'a' + 'A' ) : character );
 113 }
 114
 115 extern int isspace ( int character );
 116
 117 #endif /* _CTYPE_H */