1 /*-
2 * Copyright (c) 2002-2004 Tim J. Robbins.
3 * All rights reserved.
4 *
5 * Copyright (c) 2011 The FreeBSD Foundation
6 * All rights reserved.
7 * Portions of this software were developed by David Chisnall
8 * under sponsorship from the FreeBSD Foundation.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include "namespace.h"
36 #include <errno.h>
37 #include <stdio.h>
38 #include <string.h>
39 #include <wchar.h>
40 #include "un-namespace.h"
41 #include "libc_private.h"
42 #include "local.h"
43 #include "mblocal.h"
44
45 wchar_t *
fgetws_l(wchar_t * __restrict ws,int n,FILE * __restrict fp,locale_t locale)46 fgetws_l(wchar_t * __restrict ws, int n, FILE * __restrict fp, locale_t locale)
47 {
48 wchar_t *wsp;
49 size_t nconv;
50 const char *src;
51 unsigned char *nl;
52 FIX_LOCALE(locale);
53 struct xlocale_ctype *l = XLOCALE_CTYPE(locale);
54
55 FLOCKFILE(fp);
56 ORIENT(fp, 1);
57
58 if (n <= 0) {
59 errno = EINVAL;
60 goto error;
61 }
62
63 if (fp->_r <= 0 && __srefill(fp))
64 /* EOF */
65 goto error;
66 wsp = ws;
67 do {
68 src = fp->_p;
69 nl = memchr(fp->_p, '\n', fp->_r);
70 nconv = l->__mbsnrtowcs(wsp, &src,
71 nl != NULL ? (nl - fp->_p + 1) : fp->_r,
72 n - 1, &fp->_mbstate);
73 if (nconv == (size_t)-1)
74 /* Conversion error */
75 goto error;
76 if (src == NULL) {
77 /*
78 * We hit a null byte. Increment the character count,
79 * since mbsnrtowcs()'s return value doesn't include
80 * the terminating null, then resume conversion
81 * after the null.
82 */
83 nconv++;
84 src = memchr(fp->_p, '\0', fp->_r);
85 src++;
86 }
87 fp->_r -= (unsigned char *)src - fp->_p;
88 fp->_p = (unsigned char *)src;
89 n -= nconv;
90 wsp += nconv;
91 } while (wsp[-1] != L'\n' && n > 1 && (fp->_r > 0 ||
92 __srefill(fp) == 0));
93 if (wsp == ws)
94 /* EOF */
95 goto error;
96 if (!l->__mbsinit(&fp->_mbstate))
97 /* Incomplete character */
98 goto error;
99 *wsp = L'\0';
100 FUNLOCKFILE(fp);
101
102 return (ws);
103
104 error:
105 FUNLOCKFILE(fp);
106 return (NULL);
107 }
108 wchar_t *
fgetws(wchar_t * __restrict ws,int n,FILE * __restrict fp)109 fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp)
110 {
111 return fgetws_l(ws, n, fp, __get_locale());
112 }
113