VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/vfs/vfsiosmisc.cpp@ 56290

Last change on this file since 56290 was 56290, checked in by vboxsync, 10 years ago

IPRT: Updated (C) year.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 3.5 KB
Line 
1/* $Id: vfsiosmisc.cpp 56290 2015-06-09 14:01:31Z vboxsync $ */
2/** @file
3 * IPRT - Virtual File System, Misc I/O Stream Operations.
4 */
5
6/*
7 * Copyright (C) 2010-2015 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*******************************************************************************
29* Header Files *
30*******************************************************************************/
31#include <iprt/vfs.h>
32#include <iprt/vfslowlevel.h>
33
34#include <iprt/err.h>
35#include <iprt/string.h>
36
37
38
39RTDECL(int) RTVfsIoStrmValidateUtf8Encoding(RTVFSIOSTREAM hVfsIos, uint32_t fFlags, PRTFOFF poffError)
40{
41 /*
42 * Validate input.
43 */
44 if (poffError)
45 {
46 AssertPtrReturn(poffError, VINF_SUCCESS);
47 *poffError = 0;
48 }
49 AssertReturn(!(fFlags & ~RTVFS_VALIDATE_UTF8_VALID_MASK), VERR_INVALID_PARAMETER);
50
51 /*
52 * The loop.
53 */
54 char achBuf[1024 + 1];
55 size_t cbUsed = 0;
56 int rc;
57 for (;;)
58 {
59 /*
60 * Fill the buffer
61 */
62 size_t cbRead = 0;
63 rc = RTVfsIoStrmRead(hVfsIos, &achBuf[cbUsed], sizeof(achBuf) - cbUsed - 1, true /*fBlocking*/, &cbRead);
64 if (RT_FAILURE(rc))
65 break;
66 cbUsed += cbRead;
67 if (!cbUsed)
68 {
69 Assert(rc == VINF_EOF);
70 break;
71 }
72 achBuf[sizeof(achBuf) - 1] = '\0';
73
74 /*
75 * Process the data in the buffer, maybe leaving the final chars till
76 * the next round.
77 */
78 const char *pszCur = achBuf;
79 size_t offEnd = rc == VINF_EOF
80 ? cbUsed
81 : cbUsed >= 7
82 ? cbUsed - 7
83 : 0;
84 size_t off;
85 while ((off = (pszCur - &achBuf[0])) < offEnd)
86 {
87 RTUNICP uc;
88 rc = RTStrGetCpEx(&pszCur, &uc);
89 if (RT_FAILURE(rc))
90 break;
91 if (!uc)
92 {
93 if (fFlags & RTVFS_VALIDATE_UTF8_NO_NULL)
94 {
95 rc = VERR_INVALID_UTF8_ENCODING;
96 break;
97 }
98 }
99 else if (uc > 0x10ffff)
100 {
101 if (fFlags & RTVFS_VALIDATE_UTF8_BY_RTC_3629)
102 {
103 rc = VERR_INVALID_UTF8_ENCODING;
104 break;
105 }
106 }
107 }
108
109 if (off < cbUsed)
110 {
111 cbUsed -= off;
112 memmove(achBuf, pszCur, cbUsed);
113 }
114 }
115
116 /*
117 * Set the offset on failure.
118 */
119 if (poffError && RT_FAILURE(rc))
120 {
121 }
122
123 return rc == VINF_EOF ? VINF_SUCCESS : rc;
124}
125
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