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fgetwc.c (103538) fgetwc.c (103539)
1/*-
2 * Copyright (c) 2002 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

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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 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

--- 11 unchanged lines hidden (view full) ---

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/fgetwc.c 103538 2002-09-18 10:21:41Z tjr $");
28__FBSDID("$FreeBSD: head/lib/libc/stdio/fgetwc.c 103539 2002-09-18 12:17:28Z tjr $");
29
30#include "namespace.h"
31#include <errno.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <wchar.h>
35#include "un-namespace.h"
36#include "libc_private.h"
37#include "local.h"
38
29
30#include "namespace.h"
31#include <errno.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <wchar.h>
35#include "un-namespace.h"
36#include "libc_private.h"
37#include "local.h"
38
39static __inline wint_t __fgetwc_nbf(FILE *);
40
39wint_t
40fgetwc(FILE *fp)
41{
41wint_t
42fgetwc(FILE *fp)
43{
44 wint_t wc;
45
46 FLOCKFILE(fp);
47 ORIENT(fp, 1);
48 if (MB_CUR_MAX == 1) {
49 /*
50 * Assume we're using a single-byte locale. A safer test
51 * might be to check _CurrentRuneLocale->encoding.
52 */
53 wc = (wint_t)__sgetc(fp);
54 } else
55 wc = __fgetwc_nbf(fp);
56 FUNLOCKFILE(fp);
57
58 return (wc);
59}
60
61static __inline wint_t
62__fgetwc_nbf(FILE *fp)
63{
42 char buf[MB_LEN_MAX];
43 mbstate_t mbs;
44 size_t n, nconv;
45 int c;
46 wchar_t wc;
47
64 char buf[MB_LEN_MAX];
65 mbstate_t mbs;
66 size_t n, nconv;
67 int c;
68 wchar_t wc;
69
48 ORIENTLOCK(fp, 1);
49
50 n = 0;
51 while (n < MB_CUR_MAX) {
70 n = 0;
71 while (n < MB_CUR_MAX) {
52 if ((c = fgetc(fp)) == EOF) {
72 if ((c = __sgetc(fp)) == EOF) {
53 if (n == 0)
54 return (WEOF);
55 break;
56 }
57 buf[n++] = (char)c;
58 memset(&mbs, 0, sizeof(mbs));
59 nconv = mbrtowc(&wc, buf, n, &mbs);
60 if (nconv == n)
61 return (wc);
62 else if (nconv == 0)
63 return (L'\0');
64 else if (nconv == (size_t)-1)
65 break;
66 }
67
73 if (n == 0)
74 return (WEOF);
75 break;
76 }
77 buf[n++] = (char)c;
78 memset(&mbs, 0, sizeof(mbs));
79 nconv = mbrtowc(&wc, buf, n, &mbs);
80 if (nconv == n)
81 return (wc);
82 else if (nconv == 0)
83 return (L'\0');
84 else if (nconv == (size_t)-1)
85 break;
86 }
87
88 FUNLOCKFILE(fp);
68 while (n-- != 0)
69 ungetc((unsigned char)buf[n], fp);
89 while (n-- != 0)
90 ungetc((unsigned char)buf[n], fp);
91 FLOCKFILE(fp);
70 errno = EILSEQ;
71 return (WEOF);
72}
92 errno = EILSEQ;
93 return (WEOF);
94}