/* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include extern long int _mb_shift; /* Defined in mbtowc.c. */ /* Convert WCHAR into its multibyte character representation, putting this in S and returning its length. */ int DEFUN(wctomb, (s, wchar), register char *s AND wchar_t wchar) { register CONST mb_char *mb; if (_ctype_info->mbchar == NULL) mb = NULL; else mb = _ctype_info->mbchar->mb_chars; /* If S is NULL, just say if we're shifted or not. */ if (s == NULL) return _mb_shift != 0; if (wchar == (wchar_t) '\0') { _mb_shift = 0; /* See ANSI 4.4.1.1, line 21. */ if (s != NULL) *s = '\0'; return 1; } else if (mb == NULL) { if ((wchar_t) (char) wchar == wchar && isascii ((char) wchar)) { /* A normal ASCII character translates to itself. */ if (s != NULL) *s = (char) wchar; return 1; } return -1; } mb += wchar + _mb_shift; if (mb->string == NULL || mb->len == 0) return -1; memcpy((PTR) s, (CONST PTR) mb->string, mb->len + 1); _mb_shift += mb->shift; return mb->len; }