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Copy pathTextArrayDataReader.cpp
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474 lines (390 loc) · 12.3 KB
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/* \file
* $Id$
* \author Caton Little
* \brief
*
* \section LICENSE
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is FieldML
*
* The Initial Developer of the Original Code is Auckland Uniservices Ltd,
* Auckland, New Zealand. Portions created by the Initial Developer are
* Copyright (C) 2010 the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
*/
#include <sstream>
#include <stdio.h>
#include "StringUtil.h"
#include "FieldmlIoApi.h"
#include "TextArrayDataReader.h"
#include "InputStream.h"
using namespace std;
/**
* A pseudo-lambda class that removes the need to duplicate the slab and slice reading implementations.
* No point in making this a template class, as we need to use a different method on stream depending on the type,
* and there's no superclass functionality, so template specialization is redundant.
*/
class BufferReader
{
protected:
int bufferPos;
FieldmlInputStream * const stream;
public:
BufferReader( FieldmlInputStream *_stream ) :
stream( _stream ), bufferPos( 0 ) {}
virtual ~BufferReader() {}
virtual void read( int count ) = 0;
};
class DoubleBufferReader :
public BufferReader
{
private:
double * const buffer;
public:
DoubleBufferReader( FieldmlInputStream *_stream, double *_buffer ) :
BufferReader( _stream ), buffer( _buffer ) {}
void read( int count )
{
for( int i = 0; i < count; i++ )
{
buffer[bufferPos++] = stream->readDouble();
}
}
};
class IntBufferReader :
public BufferReader
{
private:
int * const buffer;
public:
IntBufferReader( FieldmlInputStream *_stream, int *_buffer ) :
BufferReader( _stream ), buffer( _buffer ) {}
void read( int count )
{
for( int i = 0; i < count; i++ )
{
buffer[bufferPos++] = stream->readInt();
}
}
};
class BooleanBufferReader :
public BufferReader
{
private:
FmlBoolean * const buffer;
public:
BooleanBufferReader( FieldmlInputStream *_stream, FmlBoolean *_buffer ) :
BufferReader( _stream ), buffer( _buffer ) {}
void read( int count )
{
for( int i = 0; i < count; i++ )
{
buffer[bufferPos++] = stream->readBoolean();
}
}
};
TextArrayDataReader *TextArrayDataReader::create( FieldmlIoContext *context, const string root, FmlObjectHandle source,
void *buffer)
{
FieldmlInputStream *stream = NULL;
FmlObjectHandle resource = Fieldml_GetDataSourceResource( context->getSession(), source );
string format;
char *temp_string = Fieldml_GetDataResourceFormat( context->getSession(), resource );
if( !StringUtil::safeString( temp_string, format ) )
{
context->setError( FML_IOERR_CORE_ERROR );
return NULL;
}
Fieldml_FreeString(temp_string);
FieldmlDataResourceType type = Fieldml_GetDataResourceType( context->getSession(), resource );
int rank = Fieldml_GetArrayDataSourceRank( context->getSession(), source );
if( rank <= 0 )
{
context->setError( FML_IOERR_CORE_ERROR );
return NULL;
}
if( format != StringUtil::PLAIN_TEXT_NAME )
{
context->setError( FML_IOERR_UNSUPPORTED );
return NULL;
}
if (buffer == 0)
{
if( type == FML_DATA_RESOURCE_HREF )
{
string href;
char *temp_href = Fieldml_GetDataResourceHref( context->getSession(), resource );
if( !StringUtil::safeString( temp_href, href ) )
{
context->setError( FML_IOERR_CORE_ERROR );
return NULL;
}
Fieldml_FreeString(temp_href);
stream = FieldmlInputStream::createTextFileStream( StringUtil::makeFilename( root, href ) );
}
else if( type == FML_DATA_RESOURCE_INLINE )
{
string data;
char *temp_inline_data = Fieldml_GetInlineData( context->getSession(), resource );
if( !StringUtil::safeString( temp_inline_data, data ) )
{
return NULL;
}
Fieldml_FreeString(temp_inline_data);
stream = FieldmlInputStream::createStringStream( data );
}
}
else
{
string data;
char *temp_data = (char *)buffer;
if( !StringUtil::safeString( temp_data, data ) )
{
return NULL;
}
stream = FieldmlInputStream::createStringStream( data );
}
if( stream == NULL )
{
return NULL;
}
return new TextArrayDataReader( context, stream, source, rank );
}
TextArrayDataReader::TextArrayDataReader( FieldmlIoContext *_context, FieldmlInputStream *_stream, FmlObjectHandle _source, int rank ) :
ArrayDataReader( _context ),
stream( _stream ),
source( _source ),
sourceRank( rank ),
sourceSizes( NULL ),
sourceOffsets( NULL ),
sourceRawSizes( NULL ),
closed( false )
{
startPos = -1;
nextOutermostOffset = -1;
sourceSizes = new int[sourceRank];
sourceRawSizes = new int[sourceRank];
sourceOffsets = new int[sourceRank];
Fieldml_GetArrayDataSourceSizes( context->getSession(), source, sourceSizes );
Fieldml_GetArrayDataSourceRawSizes( context->getSession(), source, sourceRawSizes );
Fieldml_GetArrayDataSourceOffsets( context->getSession(), source, sourceOffsets );
char *temp_string = Fieldml_GetArrayDataSourceLocation( context->getSession(), source );
StringUtil::safeString( temp_string, sourceLocation );
Fieldml_FreeString(temp_string);
}
bool TextArrayDataReader::checkDimensions( const int *offsets, const int *sizes )
{
for( int i = 0; i < sourceRank; i++ )
{
if( offsets[i] < 0 )
{
return false;
}
if( sizes[i] <= 0 )
{
return false;
}
int rawSize = sourceSizes[i];
if( rawSize == 0 )
{
//NOTE: Intentional. If the array-source size has not been set, use the underlying size.
rawSize = sourceRawSizes[i] - sourceOffsets[i];
}
if( offsets[i] + sizes[i] > rawSize )
{
return false;
}
}
return true;
}
FmlIoErrorNumber TextArrayDataReader::skipPreamble()
{
std::istringstream sstr( sourceLocation );
int lineNumber;
if( ! ( sstr >> lineNumber ) )
{
return FML_IOERR_INVALID_LOCATION;
}
for( int i = 1; i < lineNumber; i++ )
{
stream->skipLine();
}
if( stream->eof() )
{
return context->setError( FML_IOERR_UNEXPECTED_EOF );
}
startPos = stream->tell();
return FML_IOERR_NO_ERROR;
}
bool TextArrayDataReader::applyOffsets( const int *offsets, const int *sizes, int depth, bool isHead )
{
long count = 1;
for( int i = depth+1; i < sourceRank; i++ )
{
//NOTE This could overflow in the event that someone puts that much data into a text file. Probability: Lilliputian.
count *= sourceRawSizes[i];
}
int sliceCount;
if( isHead )
{
sliceCount = sourceOffsets[depth] + offsets[depth];
if( ( depth == 0 ) && ( nextOutermostOffset >= 0 ) && ( sliceCount >= nextOutermostOffset ) )
{
sliceCount -= nextOutermostOffset;
}
}
else
{
sliceCount = sourceRawSizes[depth] - ( sourceOffsets[depth] + offsets[depth] + sizes[depth] );
}
if( sliceCount == 0 )
{
return true;
}
for( int j = 0; j < sliceCount; j++ )
{
for( int i = 0; i < count; i++ )
{
stream->readDouble();
}
}
return !stream->eof();
}
FmlIoErrorNumber TextArrayDataReader::readPreSlab( const int *offsets, const int *sizes )
{
if( !checkDimensions( offsets, sizes ) )
{
return context->setError( FML_IOERR_INVALID_PARAMETER );
}
if( ( nextOutermostOffset >= 0 ) && ( sourceOffsets[0] + offsets[0] >= nextOutermostOffset ) )
{
return FML_IOERR_NO_ERROR;
}
if( startPos == -1 )
{
int err = skipPreamble();
if( err != FML_IOERR_NO_ERROR )
{
return err;
}
}
else
{
stream->seek( startPos );
}
return FML_IOERR_NO_ERROR;
}
FmlIoErrorNumber TextArrayDataReader::readSlice( const int *offsets, const int *sizes, int depth, BufferReader &reader )
{
if( !applyOffsets( offsets, sizes, depth, true ) )
{
return context->setError( FML_IOERR_UNEXPECTED_EOF );
}
if( depth == sourceRank - 1 )
{
reader.read( sizes[depth] );
if( stream->eof() )
{
return context->setError( FML_IOERR_UNEXPECTED_EOF );
}
}
else
{
int err;
for( int i = 0; i < sizes[depth]; i++ )
{
err = readSlice( offsets, sizes, depth + 1, reader );
if( err != FML_IOERR_NO_ERROR )
{
return err;
}
}
}
if( depth == 0 )
{
nextOutermostOffset = sourceOffsets[0] + offsets[0] + sizes[0];
}
else if( !applyOffsets( offsets, sizes, depth, false ) )
{
return context->setError( FML_IOERR_UNEXPECTED_EOF );
}
return FML_IOERR_NO_ERROR;
}
FmlIoErrorNumber TextArrayDataReader::readSlab( const int *offsets, const int *sizes, BufferReader &reader )
{
int err = readPreSlab( offsets, sizes );
if( err != FML_IOERR_NO_ERROR )
{
return err;
}
return readSlice( offsets, sizes, 0, reader );
}
FmlIoErrorNumber TextArrayDataReader::readIntSlab( const int *offsets, const int *sizes, int *valueBuffer )
{
if( closed )
{
return FML_IOERR_RESOURCE_CLOSED;
}
IntBufferReader reader( stream, valueBuffer );
return readSlab( offsets, sizes, reader );
}
FmlIoErrorNumber TextArrayDataReader::readDoubleSlab( const int *offsets, const int *sizes, double *valueBuffer )
{
if( closed )
{
return FML_IOERR_RESOURCE_CLOSED;
}
DoubleBufferReader reader( stream, valueBuffer );
return readSlab( offsets, sizes, reader );
}
FmlIoErrorNumber TextArrayDataReader::readBooleanSlab( const int *offsets, const int *sizes, FmlBoolean *valueBuffer )
{
if( closed )
{
return FML_IOERR_RESOURCE_CLOSED;
}
BooleanBufferReader reader( stream, valueBuffer );
return readSlab( offsets, sizes, reader );
}
FmlIoErrorNumber TextArrayDataReader::close()
{
if( closed )
{
return FML_IOERR_NO_ERROR;
}
closed = true;
return FML_IOERR_NO_ERROR;
}
TextArrayDataReader::~TextArrayDataReader()
{
delete stream;
delete sourceRawSizes;
delete sourceSizes;
delete sourceOffsets;
}
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