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
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://www.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: IBM Corporation
*
* Copyright: 2008 by IBM Corporation
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
#include "first.hxx"
#include "assert.h"
namespace OpenStormBento
{
unsigned long
CBenValue::GetValueSize()
{
unsigned long Size = 0;
pCBenValueSegment pCurr = nullptr;
while ((pCurr = GetNextValueSegment(pCurr)) != nullptr)
Size += pCurr->GetSize();
return Size;
}
BenError
CBenValue::ReadValueData(void * pReadBuffer, unsigned long Offset,
unsigned long Amt, unsigned long * pAmtRead)
{
BenError Err;
unsigned long SegOffset = 0;
*pAmtRead = 0;
pCBenValueSegment pCurrSeg = nullptr;
pLtcBenContainer pContainer = GetContainer();
BenByte* pBuffer = static_cast<BenByte*>(pReadBuffer);
/// pReadBuffer -- pointer to buffer of read result, allocated outside this function
/// Offset -- read buffer's start offset address, relative value in the whole value stream
/// Amt -- read buffer's size
/// pAmtRead -- return the actual read size
/// SegOffset -- current segment's start address offset, relative value in the whole value stream
while ((pCurrSeg = GetNextValueSegment(pCurrSeg)) != nullptr)
{
if (Amt == 0) /// whole buffer is full now, so return
return BenErr_OK;
if (SegOffset <= Offset && Offset < SegOffset + pCurrSeg->GetSize()) /// begin at current segment
{
unsigned long OffsetIntoSeg = Offset - SegOffset; /// relative value in this value segment stream
unsigned long AmtThisSeg = UtMin(Amt, pCurrSeg->GetSize() -
OffsetIntoSeg); /// size read in this segment, it's minimal value between Amt &
/// remain part from OffsetIntoSeg to the end of this segment
unsigned long AmtReadThisSeg; /// actual read size in this segment
if (pCurrSeg->IsImmediate())
{
UtHugeMemcpy(pBuffer, pCurrSeg->GetImmediateData() +
OffsetIntoSeg, AmtThisSeg);
AmtReadThisSeg = AmtThisSeg;
}
else
{
if ((Err = pContainer->SeekToPosition(pCurrSeg->GetPosition() +
OffsetIntoSeg)) != BenErr_OK)
return Err;
if ((Err = pContainer->Read(pBuffer, AmtThisSeg,
&AmtReadThisSeg)) != BenErr_OK)
return Err;
}
*pAmtRead += AmtReadThisSeg;
if (AmtThisSeg != AmtReadThisSeg)
return BenErr_UnexpectedEndOfFile;
pBuffer += AmtReadThisSeg;
Offset += AmtReadThisSeg;
Amt -= AmtReadThisSeg;
}
SegOffset += pCurrSeg->GetSize();
}
return BenErr_OK;
}
}//end namespace OpenStormBento
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
