1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/* $Id: RTFileCopyByHandlesEx-generic.cpp $ */
/** @file
* IPRT - RTFileCopyByHandlesEx, generic implementation.
*/
/*
* Copyright (C) 2006-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/file.h>
#include <iprt/alloca.h>
#include <iprt/assert.h>
#include <iprt/mem.h>
#include <iprt/errcore.h>
RTDECL(int) RTFileCopyByHandlesEx(RTFILE hFileSrc, RTFILE hFileDst, PFNRTPROGRESS pfnProgress, void *pvUser)
{
/*
* Validate input.
*/
AssertMsgReturn(RTFileIsValid(hFileSrc), ("hFileSrc=%RTfile\n", hFileSrc), VERR_INVALID_PARAMETER);
AssertMsgReturn(RTFileIsValid(hFileDst), ("hFileDst=%RTfile\n", hFileDst), VERR_INVALID_PARAMETER);
AssertMsgReturn(!pfnProgress || VALID_PTR(pfnProgress), ("pfnProgress=%p\n", pfnProgress), VERR_INVALID_PARAMETER);
/*
* Save file offset.
*/
uint64_t offSrcSaved;
int rc = RTFileSeek(hFileSrc, 0, RTFILE_SEEK_CURRENT, &offSrcSaved);
if (RT_FAILURE(rc))
return rc;
/*
* Get the file size and figure out how much we'll copy at a time.
*/
uint64_t cbSrc;
rc = RTFileQuerySize(hFileSrc, &cbSrc);
if (RT_FAILURE(rc))
return rc;
uint64_t cbChunk = cbSrc;
if (pfnProgress && cbSrc > _1M)
{
cbChunk /= 100;
if (cbChunk > _64M)
cbChunk = RT_ALIGN_64(cbChunk, _2M);
else
cbChunk = RT_ALIGN_64(cbChunk, _128K);
}
/*
* Prepare buffers.
*/
RTFILECOPYPARTBUFSTATE BufState;
rc = RTFileCopyPartPrep(&BufState, cbChunk);
if (RT_SUCCESS(rc))
{
/*
* Prepare the destination file.
*/
uint64_t cbDst;
rc = RTFileQuerySize(hFileDst, &cbDst);
if (RT_SUCCESS(rc) && cbDst > cbSrc)
rc = RTFileSetSize(hFileDst, cbSrc);
if (RT_SUCCESS(rc) && cbDst < cbSrc)
{
rc = RTFileSetAllocationSize(hFileDst, cbSrc, RTFILE_ALLOC_SIZE_F_DEFAULT);
if (rc == VERR_NOT_SUPPORTED)
rc = RTFileSetSize(hFileDst, cbSrc);
}
if (RT_SUCCESS(rc))
{
/*
* Copy loop that works till we reach EOF.
*/
RTFOFF off = 0;
RTFOFF cbPercent = cbSrc / 100;
RTFOFF offNextPercent = pfnProgress ? cbPercent : RTFOFF_MAX;
unsigned uPercentage = pfnProgress ? 0 : 100;
for (;;)
{
/*
* Copy a block.
*/
uint64_t cbCopied = 0;
rc = RTFileCopyPartEx(hFileSrc, off, hFileDst, off, cbChunk, 0 /*fFlags*/, &BufState, &cbCopied);
if (RT_FAILURE(rc))
break;
if (cbCopied == 0)
{
/*
* We reached the EOF. Complete the copy operation.
*/
rc = RTFileSetSize(hFileDst, off);
if (RT_SUCCESS(rc))
rc = RTFileCopyAttributes(hFileSrc, hFileDst, 0);
break;
}
/*
* Advance and work the progress callback.
*/
off += cbCopied;
if ( off >= offNextPercent
&& pfnProgress
&& uPercentage < 99)
{
do
{
uPercentage++;
offNextPercent += cbPercent;
} while ( offNextPercent <= off
&& uPercentage < 99);
rc = pfnProgress(uPercentage, pvUser);
if (RT_FAILURE(rc))
break;
}
}
}
RTFileCopyPartCleanup(&BufState);
/*
* 100%.
*/
if ( pfnProgress
&& RT_SUCCESS(rc))
rc = pfnProgress(100, pvUser);
}
/*
* Restore source position.
*/
RTFileSeek(hFileSrc, offSrcSaved, RTFILE_SEEK_BEGIN, NULL);
return rc;
}
|
