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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdlib/] [wctomb.c] - Rev 207
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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 <newlib.h> #include <stdlib.h> #include <errno.h> #include "local.h" int _DEFUN (wctomb, (s, wchar), char *s _AND wchar_t wchar) { #ifdef _MB_CAPABLE _REENT_CHECK_MISC(_REENT); return __wctomb (_REENT, s, wchar, __locale_charset (), &(_REENT_WCTOMB_STATE(_REENT))); #else /* not _MB_CAPABLE */ if (s == NULL) return 0; /* Verify that wchar is a valid single-byte character. */ if ((size_t)wchar >= 0x100) { errno = EILSEQ; return -1; } *s = (char) wchar; return 1; #endif /* not _MB_CAPABLE */ } #endif /* !_REENT_ONLY */