lib/libc/stdio/fputwc.c

   1 /*-
   2  * Copyright (c) 2002-2004 Tim J. Robbins.
   3  * All rights reserved.
   4  *
   5  * Copyright (c) 2011 The FreeBSD Foundation
   6  * All rights reserved.
   7  * Portions of this software were developed by David Chisnall
   8  * under sponsorship from the FreeBSD Foundation.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD: head/lib/libc/stdio/fputwc.c 227753 2011-11-20 14:45:42Z theraven $
  32  */
  33
  34
  35 #include "namespace.h"
  36 #include <errno.h>
  37 #include <limits.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <wchar.h>
  41 #include "un-namespace.h"
  42 #include "libc_private.h"
  43 #include "local.h"
  44 #include "mblocal.h"
  45
  46 /*
  47  * Non-MT-safe version.
  48  */
  49 wint_t
  50 __fputwc(wchar_t wc, FILE *fp, locale_t locale)
  51 {
  52         struct wchar_io_data *wcio;
  53         mbstate_t *st;
  54         char buf[MB_LEN_MAX];
  55         size_t i, len;
  56         struct xlocale_ctype *l = XLOCALE_CTYPE(locale);
  57
  58         ORIENT(fp, 1);
  59         wcio = WCIO_GET(fp);
  60         if (wcio == NULL) {
  61                 errno = ENOMEM;
  62                 return WEOF;
  63         }
  64
  65         wcio->wcio_ungetwc_inbuf = 0;
  66         st = &wcio->wcio_mbstate_out;
  67
  68         if (MB_CUR_MAX == 1 && wc > 0 && wc <= UCHAR_MAX) {
  69                 /*
  70                  * Assume single-byte locale with no special encoding.
  71                  * A more careful test would be to check
  72                  * _CurrentRuneLocale->encoding.
  73                  */
  74                 *buf = (unsigned char)wc;
  75                 len = 1;
  76         } else {
  77                 if ((len = l->__wcrtomb(buf, wc, st)) == (size_t)-1) {
  78                         fp->pub._flags |= __SERR;
  79                         return (WEOF);
  80                 }
  81         }
  82
  83         for (i = 0; i < len; i++)
  84                 if (__sputc((unsigned char)buf[i], fp) == EOF)
  85                         return (WEOF);
  86
  87         return ((wint_t)wc);
  88 }
  89
  90 /*
  91  * MT-safe version.
  92  */
  93 wint_t
  94 fputwc_l(wchar_t wc, FILE *fp, locale_t locale)
  95 {
  96         wint_t r;
  97         FIX_LOCALE(locale);
  98
  99         FLOCKFILE(fp);
 100         r = __fputwc(wc, fp, locale);
 101         FUNLOCKFILE(fp);
 102
 103         return (r);
 104 }
 105 wint_t
 106 fputwc(wchar_t wc, FILE *fp)
 107 {
 108         return fputwc_l(wc, fp, __get_locale());
 109 }