10 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
13 * Check if character is a decimal digit
15 * @v character ASCII character
16 * @ret is_digit Character is a decimal digit
18 static inline int isdigit ( int character ) {
20 return ( ( character >= '0' ) && ( character <= '9' ) );
24 * Check if character is a hexadecimal digit
26 * @v character ASCII character
27 * @ret is_xdigit Character is a hexadecimal digit
29 static inline int isxdigit ( int character ) {
31 return ( ( ( character >= '0' ) && ( character <= '9' ) ) ||
32 ( ( character >= 'A' ) && ( character <= 'F' ) ) ||
33 ( ( character >= 'a' ) && ( character <= 'f' ) ) );
37 * Check if character is an upper-case letter
39 * @v character ASCII character
40 * @ret is_upper Character is an upper-case letter
42 static inline int isupper ( int character ) {
44 return ( ( character >= 'A' ) && ( character <= 'Z' ) );
48 * Check if character is a lower-case letter
50 * @v character ASCII character
51 * @ret is_lower Character is a lower-case letter
53 static inline int islower ( int character ) {
55 return ( ( character >= 'a' ) && ( character <= 'z' ) );
59 * Check if character is alphabetic
61 * @v character ASCII character
62 * @ret is_alpha Character is alphabetic
64 static inline int isalpha ( int character ) {
66 return ( isupper ( character ) || islower ( character ) );
70 * Check if character is alphanumeric
72 * @v character ASCII character
73 * @ret is_alnum Character is alphanumeric
75 static inline int isalnum ( int character ) {
77 return ( isalpha ( character ) || isdigit ( character ) );
81 * Check if character is printable
83 * @v character ASCII character
84 * @ret is_print Character is printable
86 static inline int isprint ( int character ) {
88 return ( ( character >= ' ' ) && ( character <= '~' ) );
92 * Convert character to lower case
94 * @v character Character
95 * @v character Lower-case character
97 static inline int tolower ( int character ) {
99 return ( isupper ( character ) ?
100 ( character - 'A' + 'a' ) : character );
104 * Convert character to upper case
106 * @v character Character
107 * @v character Upper-case character
109 static inline int toupper ( int character ) {
111 return ( islower ( character ) ?
112 ( character - 'a' + 'A' ) : character );
115 extern int isspace ( int character );
117 #endif /* _CTYPE_H */