| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame] | 1 | /*-
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| 2 | Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
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| 3 | This program and the accompanying materials are licensed and made available
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| 4 | under the terms and conditions of the BSD License that accompanies this
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| 5 | distribution. The full text of the license may be found at
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| 6 | http://opensource.org/licenses/bsd-license.
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| 7 |
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| 8 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 9 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 10 |
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| 11 | * Copyright (c)2001 Citrus Project,
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| 12 | * All rights reserved.
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| 13 | *
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| 14 | * Redistribution and use in source and binary forms, with or without
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| 15 | * modification, are permitted provided that the following conditions
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| 16 | * are met:
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| 17 | * 1. Redistributions of source code must retain the above copyright
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| 18 | * notice, this list of conditions and the following disclaimer.
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| 19 | * 2. Redistributions in binary form must reproduce the above copyright
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| 20 | * notice, this list of conditions and the following disclaimer in the
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| 21 | * documentation and/or other materials provided with the distribution.
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| 22 | *
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| 23 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 33 | * SUCH DAMAGE.
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| 34 | *
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| 35 | * $Citrus$
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| 36 |
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| 37 | NetBSD: fgetwc.c,v 1.5 2006/07/03 17:06:36 tnozaki Exp
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| 38 | */
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| 39 | #include <LibConfig.h>
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| 40 | #include <sys/EfiCdefs.h>
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| 41 |
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| 42 | #include <assert.h>
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| 43 | #include <errno.h>
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| 44 | #include <stdio.h>
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| 45 | #include <wchar.h>
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| 46 | #include "reentrant.h"
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| 47 | #include "local.h"
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| 48 |
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| 49 | wint_t
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| 50 | __fgetwc_unlock(FILE *fp)
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| 51 | {
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| 52 | struct wchar_io_data *wcio;
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| 53 | mbstate_t *st;
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| 54 | wchar_t wc;
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| 55 | size_t size;
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| 56 |
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| 57 | _DIAGASSERT(fp != NULL);
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| 58 | if(fp == NULL) {
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| 59 | errno = ENOSTR;
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| 60 | return WEOF;
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| 61 | }
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| 62 |
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| 63 | _SET_ORIENTATION(fp, 1);
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| 64 | wcio = WCIO_GET(fp);
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| 65 | if (wcio == 0) {
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| 66 | errno = ENOMEM;
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| 67 | return WEOF;
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| 68 | }
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| 69 |
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| 70 | /* if there're ungetwc'ed wchars, use them */
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| 71 | if (wcio->wcio_ungetwc_inbuf) {
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| 72 | wc = wcio->wcio_ungetwc_buf[--wcio->wcio_ungetwc_inbuf];
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| 73 |
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| 74 | return wc;
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| 75 | }
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| 76 |
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| 77 | st = &wcio->wcio_mbstate_in;
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| 78 |
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| 79 | do {
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| 80 | char c;
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| 81 | int ch = __sgetc(fp);
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| 82 |
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| 83 | if (ch == EOF) {
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| 84 | return WEOF;
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| 85 | }
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| 86 |
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| 87 | c = (char)ch;
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| 88 | size = mbrtowc(&wc, &c, 1, st);
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| 89 | if (size == (size_t)-1) {
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| 90 | errno = EILSEQ;
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| 91 | fp->_flags |= __SERR;
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| 92 | return WEOF;
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| 93 | }
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| 94 | } while (size == (size_t)-2);
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| 95 |
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| 96 | _DIAGASSERT(size == 1);
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| 97 |
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| 98 | return wc;
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| 99 | }
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| 100 |
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| 101 | wint_t
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| 102 | fgetwc(FILE *fp)
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| 103 | {
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| 104 | wint_t r;
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| 105 |
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| 106 | _DIAGASSERT(fp != NULL);
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| 107 | if(fp == NULL) {
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| 108 | errno = EINVAL;
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| 109 | return (WEOF);
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| 110 | }
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| 111 |
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| 112 | FLOCKFILE(fp);
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| 113 | r = __fgetwc_unlock(fp);
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| 114 | FUNLOCKFILE(fp);
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| 115 |
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| 116 | return (r);
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| 117 | }
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