isupper man page on MirBSD
[printable version]
ISUPPER(3) BSD Programmer's Manual ISUPPER(3)
NAME
isupper - upper-case character test
SYNOPSIS
#include <ctype.h>
int
isupper(int c);
DESCRIPTION
The isupper() function tests for any upper-case letter or any of an
implementation-defined set of characters for which none of iscntrl(3),
isdigit(3), ispunct(3), or isspace(3) is true. In the C locale, isupper()
returns true only for the characters defined as upper-case letters.
RETURN VALUES
The isupper() macro returns zero if the character tests false or non-zero
if the character tests true.
SEE ALSO
isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3),
isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isxdigit(3),
stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)
STANDARDS
The isupper() function conforms to ANSI X3.159-1989 ("ANSI C").
CAVEATS
The argument to isupper() must be EOF or representable as an unsigned
char; otherwise, the result is undefined.
MirOS BSD #10-current June 29, 1991 1
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