AOO410/main/cosv/source/storage/file.cxx

/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * 
 *************************************************************/



#include <precomp.h>
#include <cosv/file.hxx>

// NOT FULLY DECLARED SERVICES


namespace csv
{


File::File( uintt  i_nMode )
	:	// aPath,
        pStream(0),
        nMode(i_nMode),
        eLastIO(io_none)
{
}

File::File( const ploc::Path &	i_rLocation,
			uintt 			    i_nMode )
	:	aPath(i_rLocation),
        pStream(0),
        nMode(i_nMode),
        eLastIO(io_none)
{
}

File::File( const char *	i_sLocation,
			uintt 			i_nMode )
	:	aPath(i_sLocation),
        pStream(0),
        nMode(i_nMode),
        eLastIO(io_none)
{
}

File::File( const String &  i_sLocation,
			uintt 			i_nMode )
	:	aPath(i_sLocation),
        pStream(0),
        nMode(i_nMode),
        eLastIO(io_none)
{
}

File::~File()
{
    if ( inq_is_open() )
        close();
}

bool
File::Assign( ploc::Path i_rLocation )
{
    if (is_open() )
		return false;

    InvalidatePath();
    aPath = i_rLocation;
    return true;
}

bool
File::Assign( const char * i_sLocation )
{
    if (is_open() )
		return false;

    InvalidatePath();
    aPath.Set( i_sLocation );
	return true;
}

bool
File::Assign( const String & i_sLocation )
{
    if (is_open() )
		return false;

    InvalidatePath();
    aPath.Set( i_sLocation );
    return true;
}

uintt
File::do_read( void *	       out_pDest,
			   uintt           i_nNrofBytes )
{
	if ( NOT inq_is_open() )
		return 0;

    if ( eLastIO == io_write )
        ::fseek( pStream, 0, SEEK_CUR );
    uintt ret = position();
    int iRet= ::fread( out_pDest, 1, i_nNrofBytes, pStream );
    if ( iRet < 0  )  {
	fprintf(stderr, "warning: read failed in %s line %d \n", __FILE__, __LINE__);
    }
    ret = position() - ret;

    eLastIO = io_read;
	return ret;
}

bool
File::inq_eod() const
{
	if ( NOT inq_is_open() )
		return true;
    return feof(pStream) != 0;
}

uintt
File::do_write( const void *   	i_pSrc,
				uintt           i_nNrofBytes )
{
    if ( NOT inq_is_open() )
		return 0;

    if ( eLastIO == io_write )
        ::fseek( pStream, 0, SEEK_CUR );
	uintt ret = position();
	::fwrite( i_pSrc, 1, i_nNrofBytes, pStream );
    ret = position() - ret;

    eLastIO = io_write;
	return ret;
}

uintt
File::do_seek( intt 	i_nDistance,
               seek_dir i_eStartPoint )
{
    if ( NOT inq_is_open() )
        return uintt(-1);

    static int eSearchDir[3] = { SEEK_SET, SEEK_CUR, SEEK_END };

    ::fseek( pStream,
             intt(i_nDistance),
             eSearchDir[i_eStartPoint] );
	return position();
}

uintt
File::inq_position() const
{
    if ( inq_is_open() )
    	return uintt( ::ftell(pStream) );
    else
        return uintt(-1);
}

bool
File::do_open( uintt i_nOpenMode )
{
    if ( inq_is_open() )
    {
        if ( i_nOpenMode == 0 OR i_nOpenMode == nMode )
            return true;
        close();
    }

    if ( i_nOpenMode != 0 )
        nMode = i_nOpenMode;

    const char * sFacadeMode = "";
    switch ( nMode )
    {
     	case CFM_RW:        sFacadeMode = "r+b";
                            break;
     	case CFM_CREATE:    sFacadeMode = "w+b";
                            break;
     	case CFM_READ:      sFacadeMode = "rb";
                            break;
        default:
                            sFacadeMode = "rb";
    }

    pStream = ::fopen( StrPath(), sFacadeMode );
    if ( pStream == 0 AND nMode == CFM_RW )
    {
        sFacadeMode = "w+b";
        pStream = ::fopen( StrPath(), sFacadeMode );
    }

    return pStream != 0;
}

void
File::do_close()
{
    if ( inq_is_open() )
    {
    	::fclose(pStream);
        pStream = 0;
    }
    eLastIO = io_none;
}

bool
File::inq_is_open() const
{
    return pStream != 0;
}

const ploc::Path &
File::inq_MyPath() const
{
 	return aPath;
}


}   // namespace csv