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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "MBSTOWCS" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" mbstowcs 
+.SH NAME
+mbstowcs \- convert a character string to a wide-character string
+.SH SYNOPSIS
+.LP
+\fB#include <stdlib.h>
+.br
+.sp
+size_t mbstowcs(wchar_t *restrict\fP \fIpwcs\fP\fB, const char *restrict\fP
+\fIs\fP\fB,
+.br
+\ \ \ \ \ \  size_t\fP \fIn\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fImbstowcs\fP() function shall convert a sequence of characters
+that begins in the initial shift state from the array
+pointed to by \fIs\fP into a sequence of corresponding wide-character
+codes and shall store not more than \fIn\fP wide-character
+codes into the array pointed to by \fIpwcs\fP. No characters that
+follow a null byte (which is converted into a wide-character
+code with value 0) shall be examined or converted. Each character
+shall be converted as if by a call to \fImbtowc\fP(), except that
+the shift state of \fImbtowc\fP() is not affected.
+.LP
+No more than \fIn\fP elements shall be modified in the array pointed
+to by \fIpwcs\fP. If copying takes place between objects
+that overlap, the behavior is undefined.
+.LP
+The behavior of this function shall be affected by the \fILC_CTYPE\fP
+category of the current locale.   \ If
+\fIpwcs\fP is a null pointer, \fImbstowcs\fP() shall return the length
+required to convert the entire array regardless of the
+value of \fIn\fP, but no values are stored. 
+.SH RETURN VALUE
+.LP
+If an invalid character is encountered, \fImbstowcs\fP() shall return
+(\fBsize_t\fP)-1   \ and may set
+\fIerrno\fP to indicate the error. 
+.LP
+Otherwise, \fImbstowcs\fP() shall return the number of the array elements
+modified   \ (or required
+if \fIpwcs\fP is null),  not including a terminating 0 code, if
+any. The array shall not be zero-terminated if the value returned
+is \fIn\fP.
+.SH ERRORS
+.LP
+The \fImbstowcs\fP() function may fail if:
+.TP 7
+.B EILSEQ
+Invalid byte sequence is detected. 
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+None.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fImblen\fP() , \fImbtowc\fP() , \fIwctomb\fP()
+, \fIwcstombs\fP() , the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
+\fI<stdlib.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 .