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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2006 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
//$Id: postgisfs.cc 34 2005-04-04 13:27:23Z pavlenko $
#include <boost/lexical_cast.hpp>
#include <boost/scoped_array.hpp>
#include <boost/algorithm/string.hpp>
#include <mapnik/global.hpp>
#include <mapnik/wkb.hpp>
#include <mapnik/unicode.hpp>
#include "postgis.hpp"
#include <sstream>
using boost::lexical_cast;
using boost::bad_lexical_cast;
using boost::trim;
using std::string;
using mapnik::Feature;
using mapnik::geometry2d;
using mapnik::byte;
using mapnik::geometry_utils;
std::string numeric2string(const char* buf)
{
int16_t ndigits = int2net(buf);
int16_t weight = int2net(buf+2);
int16_t sign = int2net(buf+4);
int16_t dscale = int2net(buf+6);
boost::scoped_array<int16_t> digits(new int16_t[ndigits]);
for (int n=0; n < ndigits ;++n)
{
digits[n] = int2net(buf+8+n*2);
}
std::ostringstream ss;
if (sign == 0x4000) ss << "-";
int i = std::max(weight,int16_t(0));
int d = 0;
while ( i >= 0)
{
if (i <= weight && d < ndigits)
ss << digits[d++];
else
ss << '0';
i--;
}
if (dscale > 0)
{
ss << '.';
while ( i >= -dscale)
{
if (i <= weight && d < ndigits)
ss << digits[d++];
i--;
}
}
return ss.str();
}
postgis_featureset::postgis_featureset(boost::shared_ptr<ResultSet> const& rs,
std::string const& encoding,
bool multiple_geometries,
unsigned num_attrs=0)
: rs_(rs),
multiple_geometries_(multiple_geometries),
num_attrs_(num_attrs),
tr_(new transcoder(encoding)),
totalGeomSize_(0),
count_(0) {}
feature_ptr postgis_featureset::next()
{
if (rs_->next())
{
feature_ptr feature(new Feature(count_));
int size=rs_->getFieldLength(0);
const char *data = rs_->getValue(0);
geometry_utils::from_wkb(*feature,data,size,multiple_geometries_);
totalGeomSize_+=size;
for (unsigned pos=1;pos<num_attrs_+1;++pos)
{
std::string name = rs_->getFieldName(pos);
const char* buf=rs_->getValue(pos);
int oid = rs_->getTypeOID(pos);
if (oid==23) //int4
{
int val = int4net(buf);
boost::put(*feature,name,val);
}
else if (oid==21) //int2
{
int val = int2net(buf);
boost::put(*feature,name,val);
}
else if (oid == 700) // float4
{
float val;
float4net(val,buf);
boost::put(*feature,name,val);
}
else if (oid == 701) // float8
{
double val;
float8net(val,buf);
boost::put(*feature,name,val);
}
else if (oid==25 || oid==1042 || oid==1043) // text or bpchar or varchar
{
std::string str(buf);
trim(str);
std::wstring wstr = tr_->transcode(str);
boost::put(*feature,name,wstr);
}
else if (oid == 1700) // numeric
{
std::string str = numeric2string(buf);
try
{
double val = boost::lexical_cast<double>(str);
boost::put(*feature,name,val);
}
catch (boost::bad_lexical_cast & ex)
{
std::clog << ex.what() << "\n";
}
}
else
{
#ifdef MAPNIK_DEBUG
std::clog << "uknown OID = " << oid << " FIXME \n";
#endif
}
}
++count_;
return feature;
}
else
{
rs_->close();
return feature_ptr();
}
}
postgis_featureset::~postgis_featureset()
{
rs_->close();
}
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