1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2002-2004 Tim J. Robbins.
5 * All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 *
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "namespace.h"
35 #include <stdio.h>
36 #include <wchar.h>
37 #include "un-namespace.h"
38 #include "libc_private.h"
39 #include "local.h"
40 #include "xlocale_private.h"
41
42 wchar_t *fgetwln_l(FILE * __restrict, size_t *, locale_t);
43
44 wchar_t *
fgetwln_l(FILE * __restrict fp,size_t * lenp,locale_t locale)45 fgetwln_l(FILE * __restrict fp, size_t *lenp, locale_t locale)
46 {
47 wchar_t *ret;
48 wint_t wc;
49 size_t len;
50 int savserr;
51
52 FIX_LOCALE(locale);
53
54 FLOCKFILE_CANCELSAFE(fp);
55 ORIENT(fp, 1);
56
57 savserr = fp->_flags & __SERR;
58 fp->_flags &= ~__SERR;
59
60 len = 0;
61 while ((wc = __fgetwc(fp, locale)) != WEOF) {
62 #define GROW 512
63 if (len * sizeof(wchar_t) >= fp->_lb._size &&
64 __slbexpand(fp, (len + GROW) * sizeof(wchar_t))) {
65 fp->_flags |= __SERR;
66 goto error;
67 }
68 *((wchar_t *)fp->_lb._base + len++) = wc;
69 if (wc == L'\n')
70 break;
71 }
72 /* fgetwc(3) may set both __SEOF and __SERR at once. */
73 if (__sferror(fp))
74 goto error;
75
76 fp->_flags |= savserr;
77 if (len == 0)
78 goto error;
79
80 *lenp = len;
81 ret = (wchar_t *)fp->_lb._base;
82 end:
83 FUNLOCKFILE_CANCELSAFE();
84 return (ret);
85
86 error:
87 *lenp = 0;
88 ret = NULL;
89 goto end;
90 }
91
92 wchar_t *
fgetwln(FILE * __restrict fp,size_t * lenp)93 fgetwln(FILE * __restrict fp, size_t *lenp)
94 {
95 return fgetwln_l(fp, lenp, __get_locale());
96 }
97