isleadbyte

intisleadbyte(intc**);**

Routine	Required Header	Compatibility
isleadbyte	<ctype.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

isleadbyte returns a nonzero value if the argument satisfies the test condition or 0 if it does not. In the “C” locale and in single-byte – character set (SBCS) locales, isleadbyte always returns 0.

Parameter

c

Integer to test

Remarks

The isleadbyte macro returns a nonzero value if its argument is the first byte of a multibyte character. isleadbyte produces a meaningful result for any integer argument from –1 (EOF) to UCHAR_MAX (0xFF), inclusive. The result of the test depends upon the LC_CTYPE category setting of the current locale; see setlocale for more information.

The expected argument type of isleadbyte is int; if a signed character is passed, the compiler may convert it to an integer by sign extension, yielding unpredictable results.

Generic-Text Routine Mappings

TCHAR.H Routine	_UNICODE & _MBCS Not Defined	_MBCS Defined	_UNICODE Defined
_istleadbyte	Always returns false	_isleadbyte	Always returns false

Byte Classification Routines, Locale Routines

See Also   _ismbb Routine Overview