__isascii, iswascii

int__isascii(intc**);**

intiswascii(wint_tc**);**

Each of these routines returns true if c is a particular representation of an ASCII character.

Routine	Required Header	Compatibility
__isascii	<ctype.h>	Win 95, Win NT
iswascii	<ctype.h> or <wchar.h>	ANSI, Win 95, Win NT

For additional compatibility information, see Compatibility in the Introduction.

Libraries

LIBC.LIB	Single thread static library, retail version
LIBCMT.LIB	Multithread static library, retail version
MSVCRT.LIB	Import library for MSVCRT.DLL, retail version

Return Value

__isascii returns a non-zero value if c is an ASCII character (in the range 0x00 – 0x7F). iswascii returns a non-zero value if c is a wide-character representation of an ASCII character. Each of these routines returns 0 if c does not satisfy the test condition.

The result of the test condition for the __isascii function depends on the LC_CTYPE category setting of the current locale; see setlocale for more information. For iswascii, the result of the test condition is independent of locale.

Parameter

c

Integer to test

Generic-Text Routine Mappings

TCHAR.H Routine	_UNICODE & _MBCS Not Defined	_MBCS Defined	_UNICODE Defined
_istascii	__isascii	__isascii	iswascii

Character Classification Routines |  Locale Routines |  is, isw Function Overview