source: GTP/trunk/Lib/Vis/Preprocessing/src/GzBinFileInputStream.cpp @ 1001

/*
 * Copyright 1999-2000,2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * $Log: GzBinFileInputStream.cpp,v $
 * Revision 1.5  2004/09/08 13:56:21  peiyongz
 * Apache License Version 2.0
 *
 * Revision 1.4  2003/12/17 13:58:02  cargilld
 * Platform update for memory management so that the static memory manager (one
 * used to call Initialize) is only for static data.
 *
 * 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 22:22:09  peiyongz
 * sane_include
 *
 * 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 01:03:59  twl
 * Initial checkin
 *
 * Revision 1.4  1999/11/08 20:56:55  droddey
 * If the main xml entity does not exist, we need to get the error handling for that
 * inside the main XMLScanner::scanDocument() try block so that it gets reported
 * in the normal way. We have to add a little extra safety code because, when this
 * happens, there is no reader on the reader stack to get position ino from.
 *
 * Revision 1.3  1999/11/08 20:45:03  rahul
 * Swat for adding in Product name and CVS comment log variable.
 *
 */


// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <xercesc/util/BinFileInputStream.hpp>
#include <xercesc/util/Janitor.hpp>
#include <xercesc/util/PlatformUtils.hpp>
#include <xercesc/util/XMLExceptMsgs.hpp>
#include <xercesc/util/XMLString.hpp>

#include "GzBinFileInputStream.h"
#include "common.h"

XERCES_CPP_NAMESPACE_BEGIN

// ---------------------------------------------------------------------------
//  GzBinFileInputStream: Constructors and Destructor
// ---------------------------------------------------------------------------
GzBinFileInputStream::GzBinFileInputStream(const XMLCh* const fileName
                                       , MemoryManager* const manager) :
//fSource(0) ,
fMemoryManager(manager),
mCurrentPos(0)
{
        // Try to open the file
    //fSource = XMLPlatformUtils::openFile(fileName, manager);
        // todo: delete xmlstring
        char *myFileName = XMLString::transcode(fileName);
        //mStream.open(myFileName, ios::binary);
        mStream.open(myFileName);

        delete [] myFileName;
}

GzBinFileInputStream::GzBinFileInputStream(const char* const fileName,
                                                                                   MemoryManager* const manager) :
fMemoryManager(manager),
mCurrentPos(0)
{
    // Try to open the file
        //mStream.open(fileName, ios::binary);
        mStream.open(fileName);
}


GzBinFileInputStream::~GzBinFileInputStream()
{
   mStream.close();
}


// ---------------------------------------------------------------------------
//  GzBinFileInputStream: Getter methods
// ---------------------------------------------------------------------------
unsigned int GzBinFileInputStream::getSize() const
{
        // todo
    return 0;
}


// ---------------------------------------------------------------------------
//  GzBinFileInputStream: Stream management methods
// ---------------------------------------------------------------------------
void GzBinFileInputStream::reset()
{
        // todo
}


// ---------------------------------------------------------------------------
//  GzBinFileInputStream: Implementation of the input stream interface
// ---------------------------------------------------------------------------
unsigned int GzBinFileInputStream::curPos() const
{
    //return XMLPlatformUtils::curFilePos(fSource, fMemoryManager);
        return mCurrentPos;
}

unsigned int GzBinFileInputStream::readBytes(XMLByte* const  toFill, 
                                                                                         const unsigned int maxToRead)
{
    //
    //  Read up to the maximum bytes requested. We return the number
    //  actually read.
    //
    //unsigned int result = XMLPlatformUtils::readFileBuffer(fSource, maxToRead, toFill, fMemoryManager);
        mStream.read((char *)toFill, maxToRead);
        
        unsigned int result = mStream.gcount();
        mCurrentPos = mStream.tellg();
        //GtpVisibilityPreprocessor::Debug << "stream: " << maxToRead << " " << toFill << " " << result << endl;

        return result;
}

XERCES_CPP_NAMESPACE_END