FileTypeClassifier.h

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//
// This file is part of the MADELINE 2 program 
// written by Edward H. Trager and Ritu Khanna
// Copyright (c) 2005 by the
// Regents of the University of Michigan.
// All Rights Reserved.
// 
// The latest version of this program is available from:
// 
//   http://eyegene.ophthy.med.umich.edu/madeline/
//   
// Released under the GNU General Public License.
// A copy of the GPL is included in the distribution
// package of this software, or see:
// 
//   http://www.gnu.org/copyleft/
//   
// ... for licensing details.
// 
//
// 2005.02.02.ET.晚上十一點鐘
//

#ifndef FILETYPECLASSIFIER_INCLUDED

//
// FileTypeClassifier
//
class FileTypeClassifier {
        
public:
        
        enum FILE_TYPE { BZIP2, GZIP, XML, PKZIP, UTF8, UNKNOWN_TYPE };
        enum FILE_SUBTYPE { XML_MS, XML_OO , XML_HTML, XML_MADELINE, UNKNOWN_SUBTYPE };
        
private:
        
        static const int BUFFER_SIZE=1024; // What buffer size ?
        static const int XML_BUFFER_SIZE=26; // Last word of the XML file
        static const char UTF8_CONTINUATION_BYTE_MASK=0xC0;
        static const char UTF8_CONTINUATION_BYTE_PATTERN=0x80;
        
        char _buffer[BUFFER_SIZE+1];
        char _xmlBuffer[XML_BUFFER_SIZE+1];
        
        int _bytesToTest;
        FILE_TYPE _type;
        
        bool _readHeaderIntoBuffer(const char *fileName);
        
        enum FILE_TYPE testUTF8();
        
        
public:
        
        //
        // Constructors:
        //
        FileTypeClassifier( const char *fileName=0 );
        
        //
        // classify(): returns an enumerated value for the file type:
        //
        enum FILE_TYPE classify( void );
        
        //
        // classifyByName(): returns a string representation of the file type:
        //
        const char *classifyByName( void );
        
        //
        // setFileToTest():
        //
        bool setFileToTest( const char *fileName );
        
        //
        // OBSOLETE: DON'T USE
        //
        enum FILE_SUBTYPE getFileSubType();
        
        //
        // OBSOLETE: DON'T USE
        //
        bool checkFileSubType( const char *flag );
        
};

#endif

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