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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "WCSXFRM" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" wcsxfrm 
+.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
+wcsxfrm \- wide-character string transformation
+.SH SYNOPSIS
+.LP
+\fB#include <wchar.h>
+.br
+.sp
+size_t wcsxfrm(wchar_t *restrict\fP \fIws1\fP\fB, const wchar_t *restrict\fP
+\fIws2\fP\fB,
+.br
+\ \ \ \ \ \  size_t\fP \fIn\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIwcsxfrm\fP() function shall transform the wide-character string
+pointed to by \fIws2\fP and place the resulting
+wide-character string into the array pointed to by \fIws1\fP. The
+transformation shall be such that if \fIwcscmp\fP() is applied to
+two transformed wide strings, it shall return a value greater than,
+equal to, or less than 0, corresponding to the result of \fIwcscoll\fP()
+applied to the
+same two original wide-character strings. No more than \fIn\fP wide-character
+codes shall be placed into the resulting array
+pointed to by \fIws1\fP, including the terminating null wide-character
+code. If \fIn\fP is 0, \fIws1\fP is permitted to be a
+null pointer. If copying takes place between objects that overlap,
+the behavior is undefined.
+.LP
+The
+\fIwcsxfrm\fP() function shall not change the setting of \fIerrno\fP
+if successful.
+.LP
+Since no return value is reserved to indicate an error, an application
+wishing to check for error situations should set
+\fIerrno\fP to 0, then call \fIwcsxfrm\fP(), then check \fIerrno\fP.
+.SH RETURN VALUE
+.LP
+The \fIwcsxfrm\fP() function shall return the length of the transformed
+wide-character string (not including the terminating
+null wide-character code). If the value returned is \fIn\fP or more,
+the contents of the array pointed to by \fIws1\fP are
+unspecified.
+.LP
+On
+error, the \fIwcsxfrm\fP() function may set \fIerrno\fP, but no return
+value is reserved to indicate an error. 
+.SH ERRORS
+.LP
+The \fIwcsxfrm\fP() function may fail if:
+.TP 7
+.B EINVAL
+The wide-character string pointed to by \fIws2\fP contains wide-character
+codes outside the domain of the collating sequence. 
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+The transformation function is such that two transformed wide-character
+strings can be ordered by \fIwcscmp\fP() as appropriate to collating
+sequence information in the program's locale (category
+\fILC_COLLATE ).\fP
+.LP
+The fact that when \fIn\fP is 0 \fIws1\fP is permitted to be a null
+pointer is useful to determine the size of the \fIws1\fP
+array prior to making the transformation.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIwcscmp\fP(), \fIwcscoll\fP(), the Base Definitions volume of
+IEEE\ Std\ 1003.1-2001, \fI<wchar.h>\fP
+.SH 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 .