lib/libc/stdio/fputwc.c

   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 }