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/*
FUNCTION
<<wctomb>>---minimal wide char to multibyte converter
INDEX
wctomb
ANSI_SYNOPSIS
#include <stdlib.h>
int wctomb(char *<[s]>, wchar_t <[wchar]>);
TRAD_SYNOPSIS
#include <stdlib.h>
int wctomb(<[s]>, <[wchar]>)
char *<[s]>;
wchar_t <[wchar]>;
DESCRIPTION
When MB_CAPABLE is not defined, this is a minimal ANSI-conforming
implementation of <<wctomb>>. The
only ``wide characters'' recognized are single bytes,
and they are ``converted'' to themselves.
When MB_CAPABLE is defined, this routine calls <<_wctomb_r>> to perform
the conversion, passing a state variable to allow state dependent
decoding. The result is based on the locale setting which may
be restricted to a defined set of locales.
Each call to <<wctomb>> modifies <<*<[s]>>> unless <[s]> is a null
pointer or MB_CAPABLE is defined and <[wchar]> is invalid.
RETURNS
This implementation of <<wctomb>> returns <<0>> if
<[s]> is <<NULL>>; it returns <<-1>> if MB_CAPABLE is enabled
and the wchar is not a valid multi-byte character, it returns <<1>>
if MB_CAPABLE is not defined or the wchar is in reality a single
byte character, otherwise it returns the number of bytes in the
multi-byte character.
PORTABILITY
<<wctomb>> is required in the ANSI C standard. However, the precise
effects vary with the locale.
<<wctomb>> requires no supporting OS subroutines.
*/
#ifndef _REENT_ONLY
#include <stdlib.h>
int
_DEFUN (wctomb, (s, wchar),
char *s _AND
wchar_t wchar)
{
#ifdef MB_CAPABLE
static int state;
return _wctomb_r (_REENT, s, wchar, &state);
#else /* not MB_CAPABLE */
if (s == NULL)
return 0;
*s = (char) wchar;
return 1;
#endif /* not MB_CAPABLE */
}
#endif /* !_REENT_ONLY */
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