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Utility.cpp

//
// Utility.cpp
//
// $Id: //poco/1.3/Data/ODBC/src/Utility.cpp#2 $
//
// Library: ODBC
// Package: ODBC
// Module:  Utility
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/Data/ODBC/Utility.h"
#include "Poco/Data/ODBC/Handle.h"
#include "Poco/Data/ODBC/ODBCException.h"
#include "Poco/NumberFormatter.h"


namespace Poco {
namespace Data {
namespace ODBC {


const DataTypes Utility::_dataTypes;
const SQLSMALLINT Utility::boolDataType = (sizeof(bool) <= sizeof(char)) ? SQL_C_TINYINT :
      (sizeof(bool) == sizeof(short)) ? SQL_C_SHORT : SQL_C_LONG;


00053 Utility::DriverMap& Utility::drivers(Utility::DriverMap& driverMap)
{
      static const EnvironmentHandle henv;
      const int length = sizeof(POCO_SQLCHAR) * 512;

      POCO_SQLCHAR desc[length];
      memset(desc, 0, length);
      SQLSMALLINT len1 = length;
      POCO_SQLCHAR attr[length];
      memset(attr, 0, length);
      SQLSMALLINT len2 = length;
      RETCODE rc = 0;

      while (!Utility::isError(rc = SQLDrivers(henv, 
            SQL_FETCH_NEXT,
            desc,
            length,
            &len1,
            attr,
            len2,
            &len2)))
      {
            driverMap.insert(DSNMap::value_type(std::string((char *) desc), 
                  std::string((char *) attr)));
            memset(desc, 0, length);
            memset(attr, 0, length);
            len2 = length;
      }

      if (SQL_NO_DATA != rc) 
            throw EnvironmentError(henv);

      return driverMap;
}


00089 Utility::DSNMap& Utility::dataSources(Utility::DSNMap& dsnMap)
{
      static const EnvironmentHandle henv;
      const int length = sizeof(POCO_SQLCHAR) * 512;
      const int dsnLength = sizeof(POCO_SQLCHAR) * (SQL_MAX_DSN_LENGTH + 1);

      POCO_SQLCHAR dsn[dsnLength];
      memset(dsn, 0, dsnLength);
      SQLSMALLINT len1 = sizeof(POCO_SQLCHAR) * SQL_MAX_DSN_LENGTH;
      POCO_SQLCHAR desc[length];
      memset(desc, 0, length);
      SQLSMALLINT len2 = length;
      RETCODE rc = 0;

      while (!Utility::isError(rc = SQLDataSources(henv, 
            SQL_FETCH_NEXT,
            dsn,
            SQL_MAX_DSN_LENGTH,
            &len1,
            desc,
            len2,
            &len2)))
      {
            dsnMap.insert(DSNMap::value_type(std::string((char *) dsn), std::string((char *) desc)));
            memset(dsn, 0, dsnLength);
            memset(desc, 0, length);
            len2 = length;
      }

      if (SQL_NO_DATA != rc) 
            throw EnvironmentError(henv);

      return dsnMap;
}


} } } // namespace Poco::Data::ODBC

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