source: icXML/icXML-devel/src/xercesc/util/BinMemInputStream.cpp @ 2722

Last change on this file since 2722 was 2722, checked in by cameron, 6 years ago

Original Xerces files with import mods for icxercesc

File size: 3.4 KB
Line 
1/*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements.  See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License.  You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18/*
19 * $Id: BinMemInputStream.cpp 670359 2008-06-22 13:43:45Z borisk $
20 */
21
22
23// ---------------------------------------------------------------------------
24//  Includes
25// ---------------------------------------------------------------------------
26#include <xercesc/util/BinMemInputStream.hpp>
27#include <xercesc/framework/MemoryManager.hpp>
28#include <string.h>
29
30XERCES_CPP_NAMESPACE_BEGIN
31
32// ---------------------------------------------------------------------------
33//  BinMemInputStream: Constructors and Destructor
34// ---------------------------------------------------------------------------
35BinMemInputStream::BinMemInputStream( const XMLByte* const       initData
36                                    , const XMLSize_t            capacity
37                                    , const BufOpts              bufOpt
38                                    ,       MemoryManager* const manager) :
39    fBuffer(0)
40    , fBufOpt(bufOpt)
41    , fCapacity(capacity)
42    , fCurIndex(0)
43    , fMemoryManager(manager)
44{
45    // According to the buffer option, do the right thing
46    if (fBufOpt == BufOpt_Copy)
47    {
48        XMLByte* tmpBuf = (XMLByte*) fMemoryManager->allocate
49        (
50            fCapacity * sizeof(XMLByte)
51        );//new XMLByte[fCapacity];
52        memcpy(tmpBuf, initData, capacity);
53        fBuffer = tmpBuf;
54    }
55     else
56    {
57        fBuffer = initData;
58    }
59}
60
61BinMemInputStream::~BinMemInputStream()
62{
63    //
64    //  If we adopted or copied the buffer, then clean it up. We have to
65    //  cast off the const'ness in that case in order to delete it.
66    //
67    if ((fBufOpt == BufOpt_Adopt) || (fBufOpt == BufOpt_Copy))
68        fMemoryManager->deallocate((XMLByte*)fBuffer);//delete [] (XMLByte*)fBuffer;
69}
70
71
72// ---------------------------------------------------------------------------
73//  MemBinInputStream: Implementation of the input stream interface
74// ---------------------------------------------------------------------------
75XMLSize_t BinMemInputStream::readBytes(       XMLByte* const  toFill
76                                      , const XMLSize_t       maxToRead)
77{
78    //
79    //  Figure out how much we can really read. Its the smaller of the
80    //  amount available and the amount asked for.
81    //
82    const XMLSize_t available = (fCapacity - fCurIndex);
83    if (!available)
84        return 0;
85
86    const XMLSize_t actualToRead = available < maxToRead ? available : maxToRead;
87
88    memcpy(toFill, &fBuffer[fCurIndex], actualToRead);
89    fCurIndex += actualToRead;
90    return actualToRead;
91}
92
93const XMLCh* BinMemInputStream::getContentType() const
94{
95    return 0;
96}
97
98XERCES_CPP_NAMESPACE_END
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