BinMemInputStream.cpp
上传用户:zhuqijet
上传日期:2013-06-25
资源大小:10074k
文件大小:6k
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2000 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation, and was
- * originally based on software copyright (c) 1999, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /*
- * $Log: BinMemInputStream.cpp,v $
- * Revision 1.3 2003/05/16 03:11:22 knoaman
- * Partial implementation of the configurable memory manager.
- *
- * Revision 1.2 2002/11/04 15:22:03 tng
- * C++ Namespace Support.
- *
- * Revision 1.1.1.1 2002/02/01 22:22:10 peiyongz
- * sane_include
- *
- * Revision 1.5 2001/11/28 19:05:29 knoaman
- * Bug 4442: fix by mlovett@uk.ibm.com
- *
- * Revision 1.4 2000/05/15 22:31:20 andyh
- * Replace #include<memory.h> with <string.h> everywhere.
- *
- * Revision 1.3 2000/03/02 19:54:38 roddey
- * This checkin includes many changes done while waiting for the
- * 1.1.0 code to be finished. I can't list them all here, but a list is
- * available elsewhere.
- *
- * Revision 1.2 2000/02/06 07:48:01 rahulj
- * Year 2K copyright swat.
- *
- * Revision 1.1.1.1 1999/11/09 01:04:05 twl
- * Initial checkin
- *
- * Revision 1.2 1999/11/08 20:45:04 rahul
- * Swat for adding in Product name and CVS comment log variable.
- *
- */
- // ---------------------------------------------------------------------------
- // Includes
- // ---------------------------------------------------------------------------
- #include <xercesc/util/BinMemInputStream.hpp>
- #include <xercesc/framework/MemoryManager.hpp>
- #include <string.h>
- XERCES_CPP_NAMESPACE_BEGIN
- // ---------------------------------------------------------------------------
- // BinMemInputStream: Constructors and Destructor
- // ---------------------------------------------------------------------------
- BinMemInputStream::BinMemInputStream( const XMLByte* const initData
- , const unsigned int capacity
- , const BufOpts bufOpt
- , MemoryManager* const manager) :
- fBuffer(0)
- , fBufOpt(bufOpt)
- , fCapacity(capacity)
- , fCurIndex(0)
- , fMemoryManager(manager)
- {
- // According to the buffer option, do the right thing
- if (fBufOpt == BufOpt_Copy)
- {
- XMLByte* tmpBuf = (XMLByte*) fMemoryManager->allocate
- (
- fCapacity * sizeof(XMLByte)
- );//new XMLByte[fCapacity];
- memcpy(tmpBuf, initData, capacity);
- fBuffer = tmpBuf;
- }
- else
- {
- fBuffer = initData;
- }
- }
- BinMemInputStream::~BinMemInputStream()
- {
- //
- // If we adopted or copied the buffer, then clean it up. We have to
- // cast off the const'ness in that case in order to delete it.
- //
- if ((fBufOpt == BufOpt_Adopt) || (fBufOpt == BufOpt_Copy))
- fMemoryManager->deallocate((XMLByte*)fBuffer);//delete [] (XMLByte*)fBuffer;
- }
- // ---------------------------------------------------------------------------
- // MemBinInputStream: Implementation of the input stream interface
- // ---------------------------------------------------------------------------
- unsigned int BinMemInputStream::readBytes( XMLByte* const toFill
- , const unsigned int maxToRead)
- {
- //
- // Figure out how much we can really read. Its the smaller of the
- // amount available and the amount asked for.
- //
- const unsigned int available = (fCapacity - fCurIndex);
- if (!available)
- return 0;
- const unsigned int actualToRead = available < maxToRead ?
- available : maxToRead;
- memcpy(toFill, &fBuffer[fCurIndex], actualToRead);
- fCurIndex += actualToRead;
- return actualToRead;
- }
- XERCES_CPP_NAMESPACE_END