btowc man page on SunOS

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btowc(3C)		 Standard C Library Functions		     btowc(3C)

NAME
       btowc - single-byte to wide-character conversion

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

       wint_t btowc(int c);

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

       The behavior of this function is affected by the LC_CTYPE  category  of
       the current locale.  See environ(5).

RETURN VALUES
       The  btowc()  function  returns	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 returns the wide-character rep‐
       resentation of that character.

ERRORS
       No errors are defined.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Interface Stability	     │Standard			   │
       ├─────────────────────────────┼─────────────────────────────┤
       │MT-Level		     │MT-Safe with exceptions	   │
       └─────────────────────────────┴─────────────────────────────┘

SEE ALSO
       setlocale(3C), wctob(3C), attributes(5), environ(5), standards(5)

NOTES
       The btowc() function can be used safely in multithreaded	 applications,
       as long as setlocale(3C) is not being called to change the locale.

SunOS 5.10			  24 Jul 2002			     btowc(3C)
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