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      1 /*
      2     Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
      3     This program and the accompanying materials are licensed and made available
      4     under the terms and conditions of the BSD License that accompanies this
      5     distribution.  The full text of the license may be found at
      6     http://opensource.org/licenses/bsd-license.
      7 
      8     THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
      9     WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     10 
     11  * Copyright (c) 2002 Tim J. Robbins.
     12  * All rights reserved.
     13  *
     14  * Redistribution and use in source and binary forms, with or without
     15  * modification, are permitted provided that the following conditions
     16  * are met:
     17  * 1. Redistributions of source code must retain the above copyright
     18  *    notice, this list of conditions and the following disclaimer.
     19  * 2. Redistributions in binary form must reproduce the above copyright
     20  *    notice, this list of conditions and the following disclaimer in the
     21  *    documentation and/or other materials provided with the distribution.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  * Original version ID:
     36  * FreeBSD: src/lib/libc/stdio/fgetws.c,v 1.4 2002/09/20 13:25:40 tjr Exp
     37 
     38     $NetBSD: fgetws.c,v 1.2 2006/07/03 17:06:36 tnozaki Exp $
     39 */
     40 #include  <LibConfig.h>
     41 #include <sys/EfiCdefs.h>
     42 
     43 #include <assert.h>
     44 #include <errno.h>
     45 #include <stdio.h>
     46 #include <wchar.h>
     47 #include "reentrant.h"
     48 #include "local.h"
     49 
     50 wchar_t *
     51 fgetws(
     52   wchar_t * __restrict ws,
     53   int n,
     54   FILE * __restrict fp
     55   )
     56 {
     57   wchar_t *wsp;
     58   wint_t wc;
     59 
     60   _DIAGASSERT(fp != NULL);
     61   _DIAGASSERT(ws != NULL);
     62   if(fp == NULL) {
     63     errno = EINVAL;
     64     return (NULL);
     65   }
     66 
     67   FLOCKFILE(fp);
     68   _SET_ORIENTATION(fp, 1);
     69 
     70   if (n <= 0) {
     71     errno = EINVAL;
     72     goto error;
     73   }
     74 
     75   wsp = ws;
     76   while (n-- > 1) {
     77     wc = __fgetwc_unlock(fp);
     78     if (__sferror(fp) != 0)
     79       goto error;
     80     if (__sfeof(fp) != 0) {
     81       if (wsp == ws) {
     82         /* EOF/error, no characters read yet. */
     83         goto error;
     84       }
     85       break;
     86     }
     87     *wsp++ = (wchar_t)wc;
     88     if (wc == L'\n') {
     89       break;
     90     }
     91   }
     92 
     93   *wsp++ = L'\0';
     94   FUNLOCKFILE(fp);
     95 
     96   return (ws);
     97 
     98 error:
     99   FUNLOCKFILE(fp);
    100   return (NULL);
    101 }
    102