138 lines
2.6 KiB
C++
138 lines
2.6 KiB
C++
/* This file is part of Mapnik (c++ mapping toolkit)
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* Copyright (C) 2005 Artem Pavlenko
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*
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* Mapnik is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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//$Id: resultset.hpp 17 2005-03-08 23:58:43Z pavlenko $
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#ifndef RESULTSET_HPP
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#define RESULTSET_HPP
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#include "connection.hpp"
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class ResultSet
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{
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private:
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PGresult* res_;
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int pos_;
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int numTuples_;
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int *refCount_;
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public:
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ResultSet(PGresult *res)
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:res_(res),pos_(-1),refCount_(new int(1))
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{
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numTuples_=PQntuples(res_);
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}
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ResultSet(const ResultSet& rhs)
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:res_(rhs.res_),
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pos_(rhs.pos_),
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numTuples_(rhs.numTuples_),
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refCount_(rhs.refCount_)
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{
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(*refCount_)++;
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}
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ResultSet& operator=(const ResultSet& rhs)
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{
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if (this==&rhs) return *this;
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if (--(refCount_)==0)
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{
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close();
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delete refCount_,refCount_=0;
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}
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res_=rhs.res_;
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pos_=rhs.pos_;
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numTuples_=rhs.numTuples_;
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refCount_=rhs.refCount_;
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(*refCount_)++;
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return *this;
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}
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void close()
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{
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PQclear(res_),res_=0;
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}
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~ResultSet()
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{
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if (--(*refCount_)==0)
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{
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PQclear(res_);
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delete refCount_,refCount_=0;
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}
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}
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int getNumFields() const
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{
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return PQnfields(res_);
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}
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bool next()
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{
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return (++pos_<numTuples_);
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}
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const char* getFieldName(int index) const
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{
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return PQfname(res_,index);
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}
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int getFieldLength(int index) const
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{
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return PQgetlength(res_,pos_,index);
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}
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int getFieldLength(const char* name) const
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{
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int col=PQfnumber(res_,name);
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if (col>=0)
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return PQgetlength(res_,pos_,col);
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return 0;
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}
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int getTypeOID(int index) const
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{
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return PQftype(res_,index);
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}
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int getTypeOID(const char* name) const
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{
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int col=PQfnumber(res_,name);
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if (col>=0)
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return PQftype(res_,col);
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return 0;
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}
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const char* getValue(int index) const
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{
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return PQgetvalue(res_,pos_,index);
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}
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const char* getValue(const char* name) const
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{
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int col=PQfnumber(res_,name);
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if (col>=0)
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return getValue(col);
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return 0;
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}
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};
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#endif //RESULTSET_HPP
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