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BinMemInputStream.hpp

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00001 /*
00002  * The Apache Software License, Version 1.1
00003  * 
00004  * Copyright (c) 1999-2000 The Apache Software Foundation.  All rights
00005  * reserved.
00006  * 
00007  * Redistribution and use in source and binary forms, with or without
00008  * modification, are permitted provided that the following conditions
00009  * are met:
00010  * 
00011  * 1. Redistributions of source code must retain the above copyright
00012  *    notice, this list of conditions and the following disclaimer. 
00013  * 
00014  * 2. Redistributions in binary form must reproduce the above copyright
00015  *    notice, this list of conditions and the following disclaimer in
00016  *    the documentation and/or other materials provided with the
00017  *    distribution.
00018  * 
00019  * 3. The end-user documentation included with the redistribution,
00020  *    if any, must include the following acknowledgment:  
00021  *       "This product includes software developed by the
00022  *        Apache Software Foundation (http://www.apache.org/)."
00023  *    Alternately, this acknowledgment may appear in the software itself,
00024  *    if and wherever such third-party acknowledgments normally appear.
00025  * 
00026  * 4. The names "Xerces" and "Apache Software Foundation" must
00027  *    not be used to endorse or promote products derived from this
00028  *    software without prior written permission. For written 
00029  *    permission, please contact apache\@apache.org.
00030  * 
00031  * 5. Products derived from this software may not be called "Apache",
00032  *    nor may "Apache" appear in their name, without prior written
00033  *    permission of the Apache Software Foundation.
00034  * 
00035  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
00036  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00037  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00038  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
00039  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00040  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00041  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
00042  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00043  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00044  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
00045  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00046  * SUCH DAMAGE.
00047  * ====================================================================
00048  * 
00049  * This software consists of voluntary contributions made by many
00050  * individuals on behalf of the Apache Software Foundation, and was
00051  * originally based on software copyright (c) 1999, International
00052  * Business Machines, Inc., http://www.ibm.com .  For more information
00053  * on the Apache Software Foundation, please see
00054  * <http://www.apache.org/>.
00055  */
00056 
00057 /*
00058  * $Log: BinMemInputStream.hpp,v $
00059  * Revision 1.3  2000/02/24 20:05:24  abagchi
00060  * Swat for removing Log from API docs
00061  *
00062  * Revision 1.2  2000/02/06 07:48:01  rahulj
00063  * Year 2K copyright swat.
00064  *
00065  * Revision 1.1.1.1  1999/11/09 01:04:07  twl
00066  * Initial checkin
00067  *
00068  * Revision 1.3  1999/11/08 20:45:04  rahul
00069  * Swat for adding in Product name and CVS comment log variable.
00070  *
00071  */
00072 
00073 #if !defined(BINMEMINPUTSTREAM_HPP)
00074 #define BINMEMINPUTSTREAM_HPP
00075 
00076 #include <util/BinInputStream.hpp>
00077 
00078 
00079 class  BinMemInputStream : public BinInputStream
00080 {
00081 public :
00082     // -----------------------------------------------------------------------
00083     //  Class specific types
00084     // -----------------------------------------------------------------------
00085     enum BufOpts
00086     {
00087         BufOpt_Adopt
00088         , BufOpt_Copy
00089         , BufOpt_Reference
00090     };
00091 
00092 
00093     // -----------------------------------------------------------------------
00094     //  Constructors and Destructor
00095     // -----------------------------------------------------------------------
00096     BinMemInputStream
00097     (
00098         const   XMLByte* const  initData
00099         , const unsigned int    capacity
00100         , const BufOpts         bufOpt = BufOpt_Copy
00101     );
00102     virtual ~BinMemInputStream();
00103 
00104 
00105     // -----------------------------------------------------------------------
00106     //  Stream management methods
00107     // -----------------------------------------------------------------------
00108     void reset();
00109 
00110 
00111     // -----------------------------------------------------------------------
00112     //  Implementation of the input stream interface
00113     // -----------------------------------------------------------------------
00114     virtual unsigned int curPos() const;
00115     virtual unsigned int readBytes
00116     (
00117                 XMLByte* const  toFill
00118         , const unsigned int    maxToRead
00119     );
00120 
00121 
00122 private :
00123     // -----------------------------------------------------------------------
00124     //  Private data members
00125     //
00126     //  fBuffer
00127     //      The buffer of bytes that we are streaming.
00128     //
00129     //  fBufOpt
00130     //      Indicates the ownership status of the buffer. The caller can have
00131     //      us adopt it (we delete it), reference it, or just make our own
00132     //      copy of it.
00133     //
00134     //  fCapacity
00135     //      The size of the buffer being streamed.
00136     //
00137     //  fCurIndex
00138     //      The current index where the next byte will be read from. When it
00139     //      hits fCapacity, we are done.
00140     // -----------------------------------------------------------------------
00141     const XMLByte*  fBuffer;
00142     BufOpts         fBufOpt;
00143     unsigned int    fCapacity;
00144     unsigned int    fCurIndex;
00145 };
00146 
00147 
00148 // ---------------------------------------------------------------------------
00149 //  BinMemInputStream: Stream management methods
00150 // ---------------------------------------------------------------------------
00151 inline void BinMemInputStream::reset()
00152 {
00153     fCurIndex = 0;
00154 }
00155 
00156 
00157 // ---------------------------------------------------------------------------
00158 //  BinMemInputStream: Implementation of the input stream interface
00159 // ---------------------------------------------------------------------------
00160 inline unsigned int BinMemInputStream::curPos() const
00161 {
00162     return fCurIndex;
00163 }
00164 
00165 #endif


Copyright © 2000 The Apache Software Foundation. All Rights Reserved.