newlib/libc/stdio/fputws.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 /*
  28 FUNCTION
  29 <<fputws>>, <<fputws_unlocked>>---write a wide character string in a file or stream
  30
  31 INDEX
  32         fputws
  33 INDEX
  34         fputws_unlocked
  35 INDEX
  36         _fputws_r
  37 INDEX
  38         _fputws_unlocked_r
  39
  40 SYNOPSIS
  41         #include <wchar.h>
  42         int fputws(const wchar_t *__restrict <[ws]>, FILE *__restrict <[fp]>);
  43
  44         #define _GNU_SOURCE
  45         #include <wchar.h>
  46         int fputws_unlocked(const wchar_t *__restrict <[ws]>, FILE *__restrict <[fp]>);
  47
  48         #include <wchar.h>
  49         int _fputws_r(struct _reent *<[ptr]>, const wchar_t *<[ws]>,
  50                       FILE *<[fp]>);
  51
  52         #include <wchar.h>
  53         int _fputws_unlocked_r(struct _reent *<[ptr]>, const wchar_t *<[ws]>,
  54                                FILE *<[fp]>);
  55
  56 DESCRIPTION
  57 <<fputws>> writes the wide character string at <[ws]> (but without the
  58 trailing null) to the file or stream identified by <[fp]>.
  59
  60 <<fputws_unlocked>> is a non-thread-safe version of <<fputws>>.
  61 <<fputws_unlocked>> may only safely be used within a scope
  62 protected by flockfile() (or ftrylockfile()) and funlockfile().  This
  63 function may safely be used in a multi-threaded program if and only
  64 if they are called while the invoking thread owns the (FILE *)
  65 object, as is the case after a successful call to the flockfile() or
  66 ftrylockfile() functions.  If threads are disabled, then
  67 <<fputws_unlocked>> is equivalent to <<fputws>>.
  68
  69 <<_fputws_r>> and <<_fputws_unlocked_r>> are simply reentrant versions of the
  70 above that take an additional reentrant struct pointer argument: <[ptr]>.
  71
  72 RETURNS
  73 If successful, the result is a non-negative integer; otherwise, the result
  74 is <<-1>> to indicate an error.
  75
  76 PORTABILITY
  77 <<fputws>> is required by C99 and POSIX.1-2001.
  78
  79 <<fputws_unlocked>> is a GNU extension.
  80 */
  81
  82 #include <_ansi.h>
  83 #include <reent.h>
  84 #include <errno.h>
  85 #include <limits.h>
  86 #include <stdio.h>
  87 #include <wchar.h>
  88 #include "fvwrite.h"
  89 #include "local.h"
  90
  91 #ifdef __IMPL_UNLOCKED__
  92 #define _fputws_r _fputws_unlocked_r
  93 #define fputws fputws_unlocked
  94 #endif
  95
  96 int
  97 _fputws_r (struct _reent *ptr,
  98         const wchar_t *ws,
  99         FILE *fp)
 100 {
 101   size_t nbytes;
 102   char buf[BUFSIZ];
 103 #ifdef _FVWRITE_IN_STREAMIO
 104   struct __suio uio;
 105   struct __siov iov;
 106
 107   _newlib_flockfile_start (fp);
 108   if (ORIENT (fp, 1) != 1)
 109     goto error;
 110   if (cantwrite (ptr, fp) != 0)
 111     goto error;
 112   uio.uio_iov = &iov;
 113   uio.uio_iovcnt = 1;
 114   iov.iov_base = buf;
 115   do
 116     {
 117       nbytes = _wcsrtombs_r(ptr, buf, &ws, sizeof (buf), &fp->_mbstate);
 118       if (nbytes == (size_t) -1)
 119         goto error;
 120       iov.iov_len = uio.uio_resid = nbytes;
 121       if (__sfvwrite_r(ptr, fp, &uio) != 0)
 122         goto error;
 123     }
 124   while (ws != NULL);
 125   _newlib_flockfile_exit (fp);
 126   return (0);
 127
 128 error:
 129   _newlib_flockfile_end (fp);
 130   return (-1);
 131 #else
 132   _newlib_flockfile_start (fp);
 133   if (cantwrite (ptr, fp) != 0)
 134     goto error;
 135
 136   do
 137     {
 138       size_t i = 0;
 139       nbytes = _wcsrtombs_r (ptr, buf, &ws, sizeof (buf), &fp->_mbstate);
 140       if (nbytes == (size_t) -1)
 141         goto error;
 142       while (i < nbytes)
 143         {
 144           if (__swputc_r (ptr, buf[i], fp) == EOF)
 145             goto error;
 146           i++;
 147         }
 148     }
 149   while (ws != NULL);
 150   _newlib_flockfile_exit (fp);
 151   return (0);
 152
 153 error:
 154   _newlib_flockfile_end (fp);
 155   return (-1);
 156 #endif
 157 }
 158
 159 int
 160 fputws (const wchar_t *__restrict ws,
 161         FILE *__restrict fp)
 162 {
 163   struct _reent *reent = _REENT;
 164
 165   CHECK_INIT (reent, fp);
 166   return _fputws_r (reent, ws, fp);
 167 }