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fgetwln.c (132242) fgetwln.c (133223)
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#include <sys/cdefs.h>
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#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/lib/libc/stdio/fgetwln.c 132242 2004-07-16 06:06:09Z tjr $");
28__FBSDID("$FreeBSD: head/lib/libc/stdio/fgetwln.c 133223 2004-08-06 17:00:09Z tjr $");
29
30#include "namespace.h"
31#include <stdio.h>
32#include <wchar.h>
33#include "un-namespace.h"
34#include "libc_private.h"
35#include "local.h"
36
37wchar_t *
38fgetwln(FILE * __restrict fp, size_t *lenp)
39{
40 wint_t wc;
41 size_t len;
42
43 FLOCKFILE(fp);
44 ORIENT(fp, 1);
45
46 len = 0;
47 while ((wc = __fgetwc(fp)) != WEOF) {
48#define GROW 512
29
30#include "namespace.h"
31#include <stdio.h>
32#include <wchar.h>
33#include "un-namespace.h"
34#include "libc_private.h"
35#include "local.h"
36
37wchar_t *
38fgetwln(FILE * __restrict fp, size_t *lenp)
39{
40 wint_t wc;
41 size_t len;
42
43 FLOCKFILE(fp);
44 ORIENT(fp, 1);
45
46 len = 0;
47 while ((wc = __fgetwc(fp)) != WEOF) {
48#define GROW 512
49 len++;
50 if (len * sizeof(wchar_t) >= fp->_lb._size &&
51 __slbexpand(fp, (len + GROW) * sizeof(wchar_t)))
52 goto error;
49 if (len * sizeof(wchar_t) >= fp->_lb._size &&
50 __slbexpand(fp, (len + GROW) * sizeof(wchar_t)))
51 goto error;
53 *((wchar_t *)fp->_lb._base + len) = wc;
52 *((wchar_t *)fp->_lb._base + len++) = wc;
54 if (wc == L'\n')
55 break;
56 }
57 if (len == 0)
58 goto error;
59
60 FUNLOCKFILE(fp);
61 *lenp = len;
62 return ((wchar_t *)fp->_lb._base);
63
64error:
65 FUNLOCKFILE(fp);
66 *lenp = 0;
67 return (NULL);
68}
53 if (wc == L'\n')
54 break;
55 }
56 if (len == 0)
57 goto error;
58
59 FUNLOCKFILE(fp);
60 *lenp = len;
61 return ((wchar_t *)fp->_lb._base);
62
63error:
64 FUNLOCKFILE(fp);
65 *lenp = 0;
66 return (NULL);
67}