Linux 2.6 - man page for btowc (linux section 3posix)
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BTOWC(P) POSIX Programmer's Manual BTOWC(P)
btowc - single byte to wide character conversion
wint_t btowc(int c);
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 category of the current
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.
No errors are defined.
The following sections are informative.
wctob() , the Base Definitions volume of IEEE Std 1003.1-2001, <wchar.h>
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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 BTOWC(P)
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