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- /* Copyright (C) 1991, 1992 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 <ansidecl.h>
- #include <localeinfo.h>
- #include <stddef.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
-
-
- extern 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)
- 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;
- }
-