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      1 /* $NetBSD: fputwc.c,v 1.5 2012/03/15 18:22:30 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c)2001 Citrus Project,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  *
     28  * $Citrus$
     29  */
     30 
     31 #include <sys/cdefs.h>
     32 #if defined(LIBC_SCCS) && !defined(lint)
     33 __RCSID("$NetBSD: fputwc.c,v 1.5 2012/03/15 18:22:30 christos Exp $");
     34 #endif /* LIBC_SCCS and not lint */
     35 
     36 #include <assert.h>
     37 #include <errno.h>
     38 #include <limits.h>
     39 #include <stdio.h>
     40 #include <wchar.h>
     41 #include "reentrant.h"
     42 #include "local.h"
     43 #include "fvwrite.h"
     44 
     45 wint_t
     46 __fputwc_unlock(wchar_t wc, FILE *fp)
     47 {
     48 	struct wchar_io_data *wcio;
     49 	mbstate_t *st;
     50 	size_t size;
     51 	char buf[MB_LEN_MAX];
     52 	struct __suio uio;
     53 	struct __siov iov;
     54 
     55 	_DIAGASSERT(fp != NULL);
     56 
     57 	/* LINTED we don't play with buf */
     58 	iov.iov_base = (void *)buf;
     59 	uio.uio_iov = &iov;
     60 	uio.uio_iovcnt = 1;
     61 
     62 	_SET_ORIENTATION(fp, 1);
     63 	wcio = WCIO_GET(fp);
     64 	if (wcio == 0) {
     65 		errno = ENOMEM;
     66 		return WEOF;
     67 	}
     68 
     69 	wcio->wcio_ungetwc_inbuf = 0;
     70 	st = &wcio->wcio_mbstate_out;
     71 
     72 	size = wcrtomb(buf, wc, st);
     73 	if (size == (size_t)-1) {
     74 		errno = EILSEQ;
     75 		return WEOF;
     76 	}
     77 
     78 	_DIAGASSERT(size != 0);
     79 
     80 	uio.uio_resid = iov.iov_len = size;
     81 	if (__sfvwrite(fp, &uio)) {
     82 		return WEOF;
     83 	}
     84 
     85 	return (wint_t)wc;
     86 }
     87 
     88 wint_t
     89 fputwc(wchar_t wc, FILE *fp)
     90 {
     91 	wint_t r;
     92 
     93 	_DIAGASSERT(fp != NULL);
     94 
     95 	FLOCKFILE(fp);
     96 	r = __fputwc_unlock(wc, fp);
     97 	FUNLOCKFILE(fp);
     98 
     99 	return r;
    100 }
    101