lib/libc/stdio/fputwc.c

   1 /* $NetBSD: fputwc.c,v 1.4 2005/06/12 05:21:27 lukem Exp $ */
   2 /* $DragonFly: src/lib/libc/stdio/fputwc.c,v 1.1 2005/07/25 00:37:41 joerg Exp $ */
   3
   4 /*-
   5  * Copyright (c)2001 Citrus Project,
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $Citrus$
  30  */
  31
  32 #include "namespace.h"
  33 #include <assert.h>
  34 #include <errno.h>
  35 #include <limits.h>
  36 #include <stdio.h>
  37 #include <wchar.h>
  38 #include "un-namespace.h"
  39
  40 #include "libc_private.h"
  41 #include "local.h"
  42 #include "priv_stdio.h"
  43
  44 wint_t
  45 __fputwc_unlock(wchar_t wc, FILE *fp)
  46 {
  47         struct wchar_io_data *wcio;
  48         mbstate_t *st;
  49         size_t size;
  50         char buf[MB_LEN_MAX];
  51         struct __suio uio;
  52         struct __siov iov;
  53
  54         _DIAGASSERT(fp != NULL);
  55
  56         /* LINTED we don't play with buf */
  57         iov.iov_base = (void *)buf;
  58         uio.uio_iov = &iov;
  59         uio.uio_iovcnt = 1;
  60
  61         _SET_ORIENTATION(fp, 1);
  62         wcio = WCIO_GET(fp);
  63         if (wcio == 0) {
  64                 errno = ENOMEM;
  65                 return WEOF;
  66         }
  67
  68         wcio->wcio_ungetwc_inbuf = 0;
  69         st = &wcio->wcio_mbstate_out;
  70
  71         size = wcrtomb(buf, wc, st);
  72         if (size == (size_t)-1) {
  73                 errno = EILSEQ;
  74                 return WEOF;
  75         }
  76
  77         _DIAGASSERT(size != 0);
  78
  79         uio.uio_resid = iov.iov_len = size;
  80         if (__sfvwrite(fp, &uio)) {
  81                 return WEOF;
  82         }
  83
  84         return (wint_t)wc;
  85 }
  86
  87 wint_t
  88 fputwc(wchar_t wc, FILE *fp)
  89 {
  90         wint_t r;
  91
  92         _DIAGASSERT(fp != NULL);
  93
  94         FLOCKFILE(fp);
  95         r = __fputwc_unlock(wc, fp);
  96         FUNLOCKFILE(fp);
  97
  98         return (r);
  99 }