fgetwc.c (1e98f88776fc606df245a382685b1ac634a81389) fgetwc.c (e74101e4eff767325553039def89de70b70f36d3)
1/*-
1/*-
2 * Copyright (c) 2002-2004 Tim J. Robbins.
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
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright

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24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include "namespace.h"
31#include <errno.h>
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

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24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include "namespace.h"
31#include <errno.h>
32#include <rune.h>
32#include <stdio.h>
33#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"
34#include <wchar.h>
35#include "un-namespace.h"
36#include "libc_private.h"
37#include "local.h"
38#include "mblocal.h"
39
38
40/*
41 * MT-safe version.
42 */
43wint_t
44fgetwc(FILE *fp)
45{
39wint_t
40fgetwc(FILE *fp)
41{
46 wint_t r;
42 wint_t wc;
43 long r;
47
44
48 FLOCKFILE(fp);
49 ORIENT(fp, 1);
50 r = __fgetwc(fp);
51 FUNLOCKFILE(fp);
45 ORIENTLOCK(fp, 1);
52
46
53 return (r);
54}
47 if ((r = fgetrune(fp)) == _INVALID_RUNE) {
48 wc = WEOF;
49 errno = EILSEQ;
50 } else if (r == EOF)
51 wc = WEOF;
52 else
53 wc = (wint_t)r;
55
54
56/*
57 * Non-MT-safe version.
58 */
59wint_t
60__fgetwc(FILE *fp)
61{
62 wchar_t wc;
63 size_t nconv;
64
65 if (fp->_r <= 0 && __srefill(fp))
66 return (WEOF);
67 if (MB_CUR_MAX == 1) {
68 /* Fast path for single-byte encodings. */
69 wc = *fp->_p++;
70 fp->_r--;
71 return (wc);
72 }
73 do {
74 nconv = __mbrtowc(&wc, fp->_p, fp->_r, &fp->_mbstate);
75 if (nconv == (size_t)-1)
76 break;
77 else if (nconv == (size_t)-2)
78 continue;
79 else if (nconv == 0) {
80 /*
81 * Assume that the only valid representation of
82 * the null wide character is a single null byte.
83 */
84 fp->_p++;
85 fp->_r--;
86 return (L'\0');
87 } else {
88 fp->_p += nconv;
89 fp->_r -= nconv;
90 return (wc);
91 }
92 } while (__srefill(fp) == 0);
93 fp->_flags |= __SERR;
94 errno = EILSEQ;
95 return (WEOF);
55 return (wc);
96}
56}