IsXXXX

determine whether a character is of a certain type. (V38)

These functions determine whether the character specified is of a certain type, according to the supplied locale.

IsAlNum() - test if alphanumeric character

IsAlpha() - test if alphabetical character

IsCntrl() - test if control character

IsDigit() - test if decimal digit character

IsGraph() - test if visible character

IsLower() - test if lower case character

IsPrint() - test if blank

IsPunct() - test if punctuation character

IsSpace() - test if white space character

IsUpper() - test if upper case character

IsXDigit() - test if hexadecimal digit

locale

the locale to use for the test

character

the character to test

state

TRUE if the character is of the required type, FALSE otherwise

These functions require full 32-bit characters be passed-in in order to support multi-byte character sets.

Prior to V46, the builtin default routines (they can be replaced by the default language driver or, since V46, by the default charset driver) did read from unallocated memory and returned random results for characters > 0xFF. Since V46, they always return FALSE in this case.

Prior to V46, the builtin default IsUpper() routine did return TRUE for the ß character (0xDF latin small letter sharp s). Fixed in V46. Prior to V46, the builtin default IsUpper() routine did return TRUE for '×', IsPunct() did return FALSE.