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WCSTOK(P) WCSTOK(P)
NAME
wcstok - split a wide-character string into tokens
SYNOPSIS
#include <wchar.h>
wchar_t *wcstok(wchar_t *restrict ws1, const wchar_t *restrict ws2,
wchar_t **restrict ptr);
DESCRIPTION
A sequence of calls to wcstok() shall break the wide-character string pointed to by
ws1 into a sequence of tokens, each of which shall be delimited by a wide-character
code from the wide-character string pointed to by ws2. The ptr argument points to a
caller-provided wchar_t pointer into which the wcstok() function shall store infor-
mation necessary for it to continue scanning the same wide-character string.
The first call in the sequence has ws1 as its first argument, and is followed by
calls with a null pointer as their first argument. The separator string pointed to
by ws2 may be different from call to call.
The first call in the sequence shall search the wide-character string pointed to by
ws1 for the first wide-character code that is not contained in the current separa-
tor string pointed to by ws2. If no such wide-character code is found, then there
are no tokens in the wide-character string pointed to by ws1 and wcstok() shall
return a null pointer. If such a wide-character code is found, it shall be the
start of the first token.
The wcstok() function shall then search from there for a wide-character code that
is contained in the current separator string. If no such wide-character code is
found, the current token extends to the end of the wide-character string pointed to
by ws1, and subsequent searches for a token shall return a null pointer. If such a
wide-character code is found, it shall be overwritten by a null wide character,
which terminates the current token. The wcstok() function shall save a pointer to
the following wide-character code, from which the next search for a token shall
start.
Each subsequent call, with a null pointer as the value of the first argument, shall
start searching from the saved pointer and behave as described above.
The implementation shall behave as if no function calls wcstok().
RETURN VALUE
Upon successful completion, the wcstok() function shall return a pointer to the
first wide-character code of a token. Otherwise, if there is no token, wcstok()
shall return a null pointer.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
The Base Definitions volume of IEEE Std 1003.1-2001, <wchar.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating
System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C)
2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The
Open Group. In the event of any discrepancy between this version and the original
IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is
the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .
POSIX 2003 WCSTOK(P)
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On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2009-01-10 12:14 @38.103.63.58 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)