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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "BTOWC" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" btowc 
+.SH NAME
+btowc \- single byte to wide character conversion
+.SH SYNOPSIS
+.LP
+\fB#include <stdio.h>
+.br
+#include <wchar.h>
+.br
+.sp
+wint_t btowc(int\fP \fIc\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIbtowc\fP() function shall determine whether \fIc\fP constitutes
+a valid (one-byte) character in the initial shift
+state.
+.LP
+The behavior of this function shall be affected by the \fILC_CTYPE\fP
+category of the current locale.
+.SH RETURN VALUE
+.LP
+The \fIbtowc\fP() function shall return WEOF if \fIc\fP has the value
+EOF or if \fB(unsigned char)\fP \fIc\fP does not
+constitute a valid (one-byte) character in the initial shift state.
+Otherwise, it shall return the wide-character representation of
+that character.
+.SH ERRORS
+.LP
+No errors are defined.
+.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
+\fIwctob\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 .