118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
#ifndef _CTYPE_H
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#define _CTYPE_H
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/** @file
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*
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* Character types
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/**
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* Check if character is a decimal digit
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*
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* @v character ASCII character
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* @ret is_digit Character is a decimal digit
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*/
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static inline int isdigit ( int character ) {
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return ( ( character >= '0' ) && ( character <= '9' ) );
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}
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/**
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* Check if character is a hexadecimal digit
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*
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* @v character ASCII character
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* @ret is_xdigit Character is a hexadecimal digit
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*/
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static inline int isxdigit ( int character ) {
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return ( ( ( character >= '0' ) && ( character <= '9' ) ) ||
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( ( character >= 'A' ) && ( character <= 'F' ) ) ||
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( ( character >= 'a' ) && ( character <= 'f' ) ) );
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}
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/**
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* Check if character is an upper-case letter
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*
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* @v character ASCII character
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* @ret is_upper Character is an upper-case letter
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*/
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static inline int isupper ( int character ) {
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return ( ( character >= 'A' ) && ( character <= 'Z' ) );
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}
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/**
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* Check if character is a lower-case letter
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*
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* @v character ASCII character
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* @ret is_lower Character is a lower-case letter
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*/
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static inline int islower ( int character ) {
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return ( ( character >= 'a' ) && ( character <= 'z' ) );
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}
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/**
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* Check if character is alphabetic
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*
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* @v character ASCII character
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* @ret is_alpha Character is alphabetic
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*/
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static inline int isalpha ( int character ) {
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return ( isupper ( character ) || islower ( character ) );
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}
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/**
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* Check if character is alphanumeric
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*
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* @v character ASCII character
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* @ret is_alnum Character is alphanumeric
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*/
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static inline int isalnum ( int character ) {
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return ( isalpha ( character ) || isdigit ( character ) );
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}
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/**
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* Check if character is printable
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*
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* @v character ASCII character
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* @ret is_print Character is printable
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*/
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static inline int isprint ( int character ) {
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return ( ( character >= ' ' ) && ( character <= '~' ) );
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}
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/**
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* Convert character to lower case
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*
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* @v character Character
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* @v character Lower-case character
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*/
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static inline int tolower ( int character ) {
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return ( isupper ( character ) ?
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( character - 'A' + 'a' ) : character );
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}
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/**
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* Convert character to upper case
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*
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* @v character Character
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* @v character Upper-case character
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*/
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static inline int toupper ( int character ) {
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return ( islower ( character ) ?
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( character - 'a' + 'A' ) : character );
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}
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extern int isspace ( int character );
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#endif /* _CTYPE_H */
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