BTOWC(3P) POSIX Programmer s Manual BTOWC(3P)

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.

NAME btowc - single byte to wide character conversion

SYNOPSIS #include <stdio.h> #include <wchar.h>

wint_t btowc(int c);

DESCRIPTION The btowc() function shall determine whether c constitutes a valid (one-byte) character in the initial shift state.

The behavior of this function shall be affected by the LC_CTYPE cate- gory of the current locale.

RETURN VALUE The btowc() function shall return WEOF if c has the value EOF or if (unsigned char) c does not constitute a valid (one-byte) character in the initial shift state. Otherwise, it shall return the wide-character representation of that character.

ERRORS No errors are defined.

The following sections are informative.

EXAMPLES None.

APPLICATION USAGE None.

RATIONALE None.

FUTURE DIRECTIONS None.

SEE ALSO wctob(), 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 .

IEEE/The Open Group 2003 BTOWC(3P)