iswupper()

Test a character to see if it's an uppercase letter

Synopsis:

#include <wctype.h>

int iswupper( wint_t wc );

Arguments:

wc: The wide character you want to test. This argument must be a wide-character code that corresponds to a valid character in the current locale, or must be WEOF; otherwise, the function's behavior is undefined.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The iswupper() function tests if the argument wc is an uppercase wide character of the class upper. In the C locale, this class includes the characters from A through Z.

Returns:

A nonzero value if the character is a member of the class upper, or 0 otherwise.

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	Yes
Signal handler	Yes
Thread	Yes

Caveats:

The result is valid only for wchar_t arguments and WEOF.