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+'\" et
+.TH WCSTOK "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.\"
+.SH NAME
+wcstok
+\(em split a wide-character string into tokens
+.SH SYNOPSIS
+.LP
+.nf
+#include <wchar.h>
+.P
+wchar_t *wcstok(wchar_t *restrict \fIws1\fP, const wchar_t *restrict \fIws2\fP,
+    wchar_t **restrict \fIptr\fP);
+.fi
+.SH DESCRIPTION
+The functionality described on this reference page is aligned with the
+ISO\ C standard. Any conflict between the requirements described here and the
+ISO\ C standard is unintentional. This volume of POSIX.1\(hy2017 defers to the ISO\ C standard.
+.P
+A sequence of calls to
+\fIwcstok\fR()
+shall break the wide-character string pointed to by
+.IR 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
+.IR ws2 .
+The
+.IR ptr
+argument points to a caller-provided
+.BR wchar_t
+pointer into which the
+\fIwcstok\fR()
+function shall store information necessary for it to continue
+scanning the same wide-character string.
+.P
+The first call in the sequence has
+.IR ws1
+as its first argument, and is followed by calls with a null pointer as
+their first argument. The separator string pointed to by
+.IR ws2
+may be different from call to call.
+.P
+The first call in the sequence shall search the wide-character string
+pointed to by
+.IR ws1
+for the first wide-character code that is
+.IR not
+contained in the current separator string pointed to by
+.IR ws2 .
+If no such wide-character code is found, then there are no tokens in
+the wide-character string pointed to by
+.IR ws1
+and
+\fIwcstok\fR()
+shall return a null pointer. If such a wide-character code is found,
+it shall be the start of the first token.
+.P
+The
+\fIwcstok\fR()
+function shall then search from there for a wide-character code that
+.IR 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
+.IR 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
+\fIwcstok\fR()
+function shall save a pointer to the following wide-character code,
+from which the next search for a token shall start.
+.P
+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.
+.P
+The implementation shall behave as if no function calls
+\fIwcstok\fR().
+.SH "RETURN VALUE"
+Upon successful completion, the
+\fIwcstok\fR()
+function shall return a pointer to the first wide-character code of a
+token. Otherwise, if there is no token,
+\fIwcstok\fR()
+shall return a null pointer.
+.SH ERRORS
+No errors are defined.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+The Base Definitions volume of POSIX.1\(hy2017,
+.IR "\fB<wchar.h>\fP"
+.\"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1-2017, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, 2018 Edition,
+Copyright (C) 2018 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 .
+.PP
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .