# BinMemInputStream.hpp

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    00001 /*
    00002  * Licensed to the Apache Software Foundation (ASF) under one or more
    00003  * contributor license agreements.  See the NOTICE file distributed with
    00004  * this work for additional information regarding copyright ownership.
    00005  * The ASF licenses this file to You under the Apache License, Version 2.0
    00006  * (the "License"); you may not use this file except in compliance with
    00007  * the License.  You may obtain a copy of the License at
    00008  *
    00009  *      http://www.apache.org/licenses/LICENSE-2.0
    00010  *
    00011  * Unless required by applicable law or agreed to in writing, software
    00012  * distributed under the License is distributed on an "AS IS" BASIS,
    00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    00014  * See the License for the specific language governing permissions and
    00015  * limitations under the License.
    00016  */
    00017
    00018 /*
    00019  * $Id: BinMemInputStream.hpp 670359 2008-06-22 13:43:45Z borisk $
    00020  */
    00021
    00022 #if !defined(XERCESC_INCLUDE_GUARD_BINMEMINPUTSTREAM_HPP)
    00023 #define XERCESC_INCLUDE_GUARD_BINMEMINPUTSTREAM_HPP
    00024
    00025 #include <xercesc/util/BinInputStream.hpp>
    00026 #include <xercesc/util/PlatformUtils.hpp>
    00027
    00028 XERCES_CPP_NAMESPACE_BEGIN
    00029
    00030 class XMLUTIL_EXPORT BinMemInputStream : public BinInputStream
    00031 {
    00032 public :
    00033     // -----------------------------------------------------------------------
    00034     //  Class specific types
    00035     // -----------------------------------------------------------------------
    00036     enum BufOpts
    00037     {
    00038         BufOpt_Adopt
    00039         , BufOpt_Copy
    00040         , BufOpt_Reference
    00041     };
    00042
    00043
    00044     // -----------------------------------------------------------------------
    00045     //  Constructors and Destructor
    00046     // -----------------------------------------------------------------------
    00047     BinMemInputStream
    00048     (
    00049         const   XMLByte* const  initData
    00050         , const XMLSize_t       capacity
    00051         , const BufOpts         bufOpt = BufOpt_Copy
    00052         , MemoryManager* const  manager = XMLPlatformUtils::fgMemoryManager
    00053     );
    00054     virtual ~BinMemInputStream();
    00055
    00056
    00057     // -----------------------------------------------------------------------
    00058     //  Stream management methods
    00059     // -----------------------------------------------------------------------
    00060     void reset();
    00061
    00062
    00063     // -----------------------------------------------------------------------
    00064     //  Implementation of the input stream interface
    00065     // -----------------------------------------------------------------------
    00066     virtual XMLFilePos curPos() const;
    00067
    00068     virtual XMLSize_t readBytes
    00069     (
    00070                 XMLByte* const  toFill
    00071         , const XMLSize_t       maxToRead
    00072     );
    00073
    00074     virtual const XMLCh* getContentType() const;
    00075
    00076     inline XMLSize_t getSize() const;
    00077
    00078 private :
    00079     // -----------------------------------------------------------------------
    00080     //  Unimplemented constructors and operators
    00081     // -----------------------------------------------------------------------
    00082     BinMemInputStream(const BinMemInputStream&);
    00083     BinMemInputStream& operator=(const BinMemInputStream&);
    00084     // -----------------------------------------------------------------------
    00085     //  Private data members
    00086     //
    00087     //  fBuffer
    00088     //      The buffer of bytes that we are streaming.
    00089     //
    00090     //  fBufOpt
    00091     //      Indicates the ownership status of the buffer. The caller can have
    00092     //      us adopt it (we delete it), reference it, or just make our own
    00093     //      copy of it.
    00094     //
    00095     //  fCapacity
    00096     //      The size of the buffer being streamed.
    00097     //
    00098     //  fCurIndex
    00099     //      The current index where the next byte will be read from. When it
    00100     //      hits fCapacity, we are done.
    00101     // -----------------------------------------------------------------------
    00102     const XMLByte*  fBuffer;
    00103     BufOpts         fBufOpt;
    00104     XMLSize_t       fCapacity;
    00105     XMLSize_t       fCurIndex;
    00106     MemoryManager*  fMemoryManager;
    00107 };
    00108
    00109
    00110 // ---------------------------------------------------------------------------
    00111 //  BinMemInputStream: Stream management methods
    00112 // ---------------------------------------------------------------------------
    00113 inline void BinMemInputStream::reset()
    00114 {
    00115     fCurIndex = 0;
    00116 }
    00117
    00118
    00119 // ---------------------------------------------------------------------------
    00120 //  BinMemInputStream: Implementation of the input stream interface
    00121 // ---------------------------------------------------------------------------
    00122 inline XMLFilePos BinMemInputStream::curPos() const
    00123 {
    00124     return fCurIndex;
    00125 }
    00126
    00127 inline XMLSize_t BinMemInputStream::getSize() const
    00128 {
    00129     return fCapacity;
    00130 }
    00131
    00132 XERCES_CPP_NAMESPACE_END
    00133
    00134 #endif