stdio/FreeBSD/fputwc.c

   1 /*-
   2  * Copyright (c) 2002-2004 Tim J. Robbins.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD: src/lib/libc/stdio/fputwc.c,v 1.11 2008/04/17 22:17:53 jhb Exp $");
  29
  30 #include "namespace.h"
  31 #include <errno.h>
  32 #include <limits.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <wchar.h>
  36 #include "un-namespace.h"
  37 #include "libc_private.h"
  38 #include "local.h"
  39 #include "mblocal.h"
  40
  41 /*
  42  * Non-MT-safe version.
  43  */
  44 wint_t
  45 __fputwc(wchar_t wc, FILE *fp)
  46 {
  47         char buf[MB_LEN_MAX];
  48         size_t i, len;
  49
  50         if (MB_CUR_MAX == 1 && wc > 0 && wc <= UCHAR_MAX) {
  51                 /*
  52                  * Assume single-byte locale with no special encoding.
  53                  * A more careful test would be to check
  54                  * _CurrentRuneLocale->encoding.
  55                  */
  56                 *buf = (unsigned char)wc;
  57                 len = 1;
  58         } else {
  59                 if ((len = __wcrtomb(buf, wc, &fp->_mbstate)) == (size_t)-1) {
  60                         fp->_flags |= __SERR;
  61                         return (WEOF);
  62                 }
  63         }
  64
  65         for (i = 0; i < len; i++)
  66                 if (__sputc((unsigned char)buf[i], fp) == EOF)
  67                         return (WEOF);
  68
  69         return ((wint_t)wc);
  70 }
  71
  72 /*
  73  * MT-safe version.
  74  */
  75 wint_t
  76 fputwc(wchar_t wc, FILE *fp)
  77 {
  78         wint_t r;
  79
  80         FLOCKFILE(fp);
  81         ORIENT(fp, 1);
  82         r = __fputwc(wc, fp);
  83         FUNLOCKFILE(fp);
  84
  85         return (r);
  86 }