cxgbe/t4_tom: Read the chip's DDP page sizes and save them in a
[freebsd-src.git] / lib / libc / stdio / fgetwc.c
blob52bc988f7dc7c74012985a8b8a0d8b5a5b745011
1 /*-
2 * Copyright (c) 2002-2004 Tim J. Robbins.
3 * All rights reserved.
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.
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.
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.
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include "namespace.h"
36 #include <errno.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <wchar.h>
40 #include "un-namespace.h"
41 #include "libc_private.h"
42 #include "local.h"
43 #include "mblocal.h"
44 #include "xlocale_private.h"
47 * MT-safe version.
49 wint_t
50 fgetwc_l(FILE *fp, locale_t locale)
52 wint_t r;
53 FIX_LOCALE(locale);
55 FLOCKFILE(fp);
56 ORIENT(fp, 1);
57 r = __fgetwc(fp, locale);
58 FUNLOCKFILE(fp);
60 return (r);
63 wint_t
64 fgetwc(FILE *fp)
66 return fgetwc_l(fp, __get_locale());
70 * Internal (non-MPSAFE) version of fgetwc(). This version takes an
71 * mbstate_t argument specifying the initial conversion state. For
72 * wide streams, this should always be fp->_mbstate. On return, *nread
73 * is set to the number of bytes read.
75 wint_t
76 __fgetwc_mbs(FILE *fp, mbstate_t *mbs, int *nread, locale_t locale)
78 wchar_t wc;
79 size_t nconv;
80 struct xlocale_ctype *l = XLOCALE_CTYPE(locale);
82 if (fp->_r <= 0 && __srefill(fp)) {
83 *nread = 0;
84 return (WEOF);
86 if (MB_CUR_MAX == 1) {
87 /* Fast path for single-byte encodings. */
88 wc = *fp->_p++;
89 fp->_r--;
90 *nread = 1;
91 return (wc);
93 *nread = 0;
94 do {
95 nconv = l->__mbrtowc(&wc, fp->_p, fp->_r, mbs);
96 if (nconv == (size_t)-1)
97 break;
98 else if (nconv == (size_t)-2)
99 continue;
100 else if (nconv == 0) {
101 fp->_p++;
102 fp->_r--;
103 (*nread)++;
104 return (L'\0');
105 } else {
106 fp->_p += nconv;
107 fp->_r -= nconv;
108 *nread += nconv;
109 return (wc);
111 } while (__srefill(fp) == 0);
112 fp->_flags |= __SERR;
113 errno = EILSEQ;
114 return (WEOF);