usr/src/lib/libc/port/locale/fwide.c

   1 /*
   2  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   3  * Copyright (c) 2002 Tim J. Robbins.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #include "lint.h"
  29 #include "mse_int.h"
  30 #include "file64.h"
  31 #include "mse.h"
  32 #include <errno.h>
  33 #include <stdio.h>
  34 #include <wchar.h>
  35 #include "mblocal.h"
  36
  37 int
  38 fwide(FILE *fp, int mode)
  39 {
  40         int m;
  41         rmutex_t        *lk;
  42
  43         FLOCKFILE(lk, fp);
  44         /* Only change the orientation if the stream is not oriented yet. */
  45         m = _getorientation(fp);
  46         if (mode != 0 && m == _NO_MODE)
  47                 _setorientation(fp, (mode > 0) ? _WC_MODE : _BYTE_MODE);
  48         FUNLOCKFILE(lk);
  49
  50         switch (m) {
  51         case _WC_MODE:
  52                 mode = 1;
  53                 break;
  54         case _NO_MODE:
  55                 mode = 0;
  56                 break;
  57         case _BYTE_MODE:
  58                 mode = -1;
  59                 break;
  60         }
  61
  62         return (mode);
  63 }