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 *
fgetws(wchar_t * __restrict ws,int n,FILE * __restrict fp)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