Line data Source code
1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*************************************************************************
3 : *
4 : * The Contents of this file are made available subject to the terms of
5 : * either of the following licenses
6 : *
7 : * - GNU Lesser General Public License Version 2.1
8 : * - Sun Industry Standards Source License Version 1.1
9 : *
10 : * Sun Microsystems Inc., October, 2000
11 : *
12 : * GNU Lesser General Public License Version 2.1
13 : * =============================================
14 : * Copyright 2000 by Sun Microsystems, Inc.
15 : * 901 San Antonio Road, Palo Alto, CA 94303, USA
16 : *
17 : * This library is free software; you can redistribute it and/or
18 : * modify it under the terms of the GNU Lesser General Public
19 : * License version 2.1, as published by the Free Software Foundation.
20 : *
21 : * This library is distributed in the hope that it will be useful,
22 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 : * Lesser General Public License for more details.
25 : *
26 : * You should have received a copy of the GNU Lesser General Public
27 : * License along with this library; if not, write to the Free Software
28 : * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 : * MA 02111-1307 USA
30 : *
31 : *
32 : * Sun Industry Standards Source License Version 1.1
33 : * =================================================
34 : * The contents of this file are subject to the Sun Industry Standards
35 : * Source License Version 1.1 (the "License"); You may not use this file
36 : * except in compliance with the License. You may obtain a copy of the
37 : * License at http://www.openoffice.org/license.html.
38 : *
39 : * Software provided under this License is provided on an "AS IS" basis,
40 : * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
41 : * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
42 : * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
43 : * See the License for the specific provisions governing your rights and
44 : * obligations concerning the Software.
45 : *
46 : * The Initial Developer of the Original Code is: IBM Corporation
47 : *
48 : * Copyright: 2008 by IBM Corporation
49 : *
50 : * All Rights Reserved.
51 : *
52 : * Contributor(s): _______________________________________
53 : *
54 : *
55 : ************************************************************************/
56 : #include "first.hxx"
57 : #include "assert.h"
58 : namespace OpenStormBento
59 : {
60 :
61 : unsigned long
62 0 : CBenValue::GetValueSize()
63 : {
64 0 : unsigned long Size = 0;
65 0 : pCBenValueSegment pCurr = NULL;
66 0 : while ((pCurr = GetNextValueSegment(pCurr)) != NULL)
67 0 : Size += pCurr->GetSize();
68 0 : return Size;
69 : }
70 :
71 : BenError
72 0 : CBenValue::ReadValueData(BenDataPtr pReadBuffer, unsigned long Offset,
73 : unsigned long Amt, unsigned long * pAmtRead)
74 : {
75 : BenError Err;
76 0 : unsigned long SegOffset = 0;
77 0 : *pAmtRead = 0;
78 0 : pCBenValueSegment pCurrSeg = NULL;
79 0 : pLtcBenContainer pContainer = GetContainer();
80 0 : BenByteDataPtr pBuffer = (BenByteDataPtr) pReadBuffer;
81 :
82 : /// pReadBuffer -- pointer to buffer of read result, allocated outside this function
83 : /// Offset -- read buffer's start offset address, relative value in the whole value stream
84 : /// Amt -- read buffer's size
85 : /// pAmtRead -- return the actual read size
86 :
87 : /// SegOffset -- current segment's start address offset, relative value in the whole value stream
88 :
89 0 : while ((pCurrSeg = GetNextValueSegment(pCurrSeg)) != NULL)
90 : {
91 0 : if (Amt == 0) /// whole buffer is full now, so return
92 0 : return BenErr_OK;
93 :
94 0 : if (SegOffset <= Offset && Offset < SegOffset + pCurrSeg->GetSize()) /// begin at current segment
95 : {
96 0 : unsigned long OffsetIntoSeg = Offset - SegOffset; /// relative value in this value segment stream
97 :
98 0 : unsigned long AmtThisSeg = UtMin(Amt, pCurrSeg->GetSize() -
99 : OffsetIntoSeg); /// size read in this segment, it's minimal value between Amt &
100 : /// remain part from OffsetIntoSeg to the end of this segment
101 :
102 : unsigned long AmtReadThisSeg; /// actual read size in this segment
103 0 : if (pCurrSeg->IsImmediate())
104 : {
105 0 : UtHugeMemcpy(pBuffer, pCurrSeg->GetImmediateData() +
106 0 : OffsetIntoSeg, AmtThisSeg);
107 0 : AmtReadThisSeg = AmtThisSeg;
108 : }
109 : else
110 : {
111 0 : if ((Err = pContainer->SeekToPosition(pCurrSeg->GetPosition() +
112 0 : OffsetIntoSeg)) != BenErr_OK)
113 0 : return Err;
114 :
115 0 : if ((Err = pContainer->Read(pBuffer, AmtThisSeg,
116 : &AmtReadThisSeg)) != BenErr_OK)
117 0 : return Err;
118 : }
119 :
120 0 : *pAmtRead += AmtReadThisSeg;
121 :
122 0 : if (AmtThisSeg != AmtReadThisSeg)
123 0 : return BenErr_UnexpectedEndOfFile;
124 :
125 0 : pBuffer += AmtReadThisSeg;
126 0 : Offset += AmtReadThisSeg;
127 0 : Amt -= AmtReadThisSeg;
128 : }
129 :
130 0 : SegOffset += pCurrSeg->GetSize();
131 : }
132 0 : return BenErr_OK;
133 : }
134 :
135 : }//end namespace OpenStormBento
136 :
137 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|