/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   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 General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

// $Id: udf.cpp 2035 2013-01-21 14:12:19Z rdempsey $

#include <dlfcn.h>
#include <string>
#include <sstream>
#include <iostream>
using namespace std;

#include "primproc.h"
using namespace primitiveprocessor;

namespace
{
const string UdfLibName("libcaludf.so");
}

namespace primitiveprocessor
{
void loadUDFs()
{
  int flags = RTLD_NOW;

  void* libPtr = 0;

  UDFFcnPtr_t fcnPtr;

  libPtr = dlopen(UdfLibName.c_str(), flags);

  if (libPtr == 0)
    return;

  unsigned i = 1;

  for (;;)
  {
    ostringstream oss;
    oss << "cpfunc" << i;
    fcnPtr = (UDFFcnPtr_t)dlsym(libPtr, oss.str().c_str());

    if (fcnPtr == 0)
      break;

    UDFFcnMap[i] = fcnPtr;
    i++;
  }

  cout << "loaded " << UDFFcnMap.size() << " UDF's" << endl;
}

}  // namespace primitiveprocessor