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/*
open source routing machine
Copyright (C) Dennis Luxen, others 2010
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU AFFERO General Public License as published by
the Free Software Foundation; either version 3 of the License, or
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
or see http://www.gnu.org/licenses/agpl.txt.
*/
#ifndef INPUTREADERFACTORY_H
#define INPUTREADERFACTORY_H
#include <bzlib.h>
#include <libxml/xmlreader.h>
struct BZ2Context {
FILE* file;
BZFILE* bz2;
int error;
int nUnused;
char unused[BZ_MAX_UNUSED];
};
int readFromBz2Stream( void* pointer, char* buffer, int len ) {
void *unusedTmpVoid=NULL;
char *unusedTmp=NULL;
BZ2Context* context = (BZ2Context*) pointer;
int read = 0;
while(0 == read && !(BZ_STREAM_END == context->error && 0 == context->nUnused && feof(context->file))) {
read = BZ2_bzRead(&context->error, context->bz2, buffer, len);
if(BZ_OK == context->error) {
return read;
} else if(BZ_STREAM_END == context->error) {
BZ2_bzReadGetUnused(&context->error, context->bz2, &unusedTmpVoid, &context->nUnused);
if(BZ_OK != context->error) { cerr << "Could not BZ2_bzReadGetUnused" << endl; exit(-1);};
unusedTmp = (char*)unusedTmpVoid;
for(int i=0;i<context->nUnused;i++) {
context->unused[i] = unusedTmp[i];
}
BZ2_bzReadClose(&context->error, context->bz2);
if(BZ_OK != context->error) { cerr << "Could not BZ2_bzReadClose" << endl; exit(-1);};
context->error = BZ_STREAM_END; // set to the stream end for next call to this function
if(0 == context->nUnused && feof(context->file)) {
return read;
} else {
context->bz2 = BZ2_bzReadOpen(&context->error, context->file, 0, 0, context->unused, context->nUnused);
if(NULL == context->bz2){ cerr << "Could not open file" << endl; exit(-1);};
}
} else { cerr << "Could not read bz2 file" << endl; exit(-1); }
}
return read;
}
int closeBz2Stream( void *pointer )
{
BZ2Context* context = (BZ2Context*) pointer;
fclose( context->file );
delete context;
return 0;
}
xmlTextReaderPtr inputReaderFactory( const char* name )
{
std::string inputName(name);
if(inputName.find(".osm.bz2")!=string::npos)
{
BZ2Context* context = new BZ2Context();
context->error = false;
context->file = fopen( name, "r" );
int error;
context->bz2 = BZ2_bzReadOpen( &error, context->file, 0, 0, context->unused, context->nUnused );
if ( context->bz2 == NULL || context->file == NULL ) {
delete context;
return NULL;
}
return xmlReaderForIO( readFromBz2Stream, closeBz2Stream, (void*) context, NULL, NULL, 0 );
} else {
return xmlNewTextReaderFilename(name);
}
}
#endif // INPUTREADERFACTORY_H
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