06-16-2013
Actually "\s" is not an anchor. It is character class containing space and tab.
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LEARN ABOUT HPUX
iswalpha
wctype(3C) wctype(3C)
NAME
wctype(), iswalpha(), iswblank(), iswupper(), iswlower(), iswdigit(), iswxdigit(), iswalnum(), iswspace(), iswpunct(), iswprint(), isw-
graph(), iswcntrl(), iswctype() - classify wide characters
SYNOPSIS
Remarks
These functions are compliant with the XPG4 Worldwide Portability Interface wide-character classification functions. They parallel the
8-bit character classification functions defined in ctype(3C).
DESCRIPTION
These functions classify wide character values according to the rules of the coded character set identified by the last successful call to
(see setlocale(3C)).
If has not been called successfully, characters are classified according to the rules of the default ASCII 7-bit coded character set (see
setlocale(3C)).
Each of the classification functions is a predicate that returns non-zero for true, zero for false.
is defined for valid character class names as defined in the current locale. charclass is a string identifying a generic character class
for which codeset-specific type information is required. The following class names are defined in all locales: and User-defined class
names may be specified if supported by the current locale as defined by (see setlocale(3C)). returns a value of type that can be used in a
subsequent call to or if charclass is not valid in the current locale.
The classification functions return non-zero under the following circumstances, and zero otherwise:
wc has the property defined by prop.
wc is a letter.
wc is a blank character; that is a space or tab.
wc is an uppercase letter.
wc is a lowercase letter.
wc is a decimal digit (in ASCII: characters [0-9]).
wc is a hexadecimal digit (in ASCII: characters [0-9], [A-F] or [a-f]).
wc is an alphanumeric (letters or digits).
wc is a character that creates "white space" in displayed text (in ASCII: space, tab, carriage return, new-line,
vertical tab, and form-feed).
wc is a punctuation character (in ASCII: any printing character except the space character(040), digits, letters).
wc is a printing character.
wc is a visible character (in ASCII: printing characters, excluding the space character(040)).
wc is a control character (in ASCII: character codes less than 040 and the delete character(0177)).
If the argument to any of these functions is outside the domain of the function, the result is 0 (false).
Definitions for these functions and the types and are provided in the header.
EXTERNAL INFLUENCES
Locale
The category determines the classification of character type.
International Code Set Support
Single-byte and multibyte character code sets are supported.
AUTHOR
was developed by IBM, OSF, and HP.
SEE ALSO
ctype(3C), multibyte(3C), setlocale(3C), ascii(5), thread_safety(5).
STANDARDS CONFORMANCE
wctype(3C)