/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


 
/** @HTML */

#ifndef _OSL_MODULE_HXX_
#define _OSL_MODULE_HXX_

#include <rtl/ustring.hxx>
#include <osl/module.h>

namespace osl
{

class Module
{
    Module( const Module&);
    Module& operator = ( const Module&);

public:
    static sal_Bool getUrlFromAddress(void * addr, ::rtl::OUString & libraryUrl) {
        return osl_getModuleURLFromAddress(addr, &libraryUrl.pData);
    }

    /** Get module URL from the specified function address in the module.
	
        Similar to getUrlFromAddress, but use a function address to get URL of the Module. 
        Use Function pointer as symbol address to conceal type conversion.
	   
        @param addr
        [in] function address in oslGenericFunction format.
	           
        @param libraryUrl
        [in|out] receives the URL of the module.
           
        @return
        <dl>
        <dt>sal_True</dt>
        <dd>on success</dd>
        <dt>sal_False</dt>
        <dd>can not get the URL from the specified function address or the parameter is invalid.</dd>
        </dl>
           
        @see getUrlFromAddress
    */
    static sal_Bool getUrlFromAddress( oslGenericFunction addr, ::rtl::OUString & libraryUrl){
        return osl_getModuleURLFromFunctionAddress( addr, &libraryUrl.pData );
    }

    Module(): m_Module(0){}

    Module( const ::rtl::OUString& strModuleName, sal_Int32 nRtldMode = SAL_LOADMODULE_DEFAULT) : m_Module(0)
    {
        load( strModuleName, nRtldMode);
    }

    ~Module()
    {
        osl_unloadModule(m_Module);
    }

    sal_Bool SAL_CALL load( const ::rtl::OUString& strModuleName, 
        sal_Int32 nRtldMode = SAL_LOADMODULE_DEFAULT)
    {
        unload();
        m_Module= osl_loadModule( strModuleName.pData, nRtldMode );
        return is();
    }

    /// @since UDK 3.2.8
    sal_Bool SAL_CALL loadRelative(
        ::oslGenericFunction baseModule, ::rtl::OUString const & relativePath,
        ::sal_Int32 mode = SAL_LOADMODULE_DEFAULT)
    {
        unload();
        m_Module = osl_loadModuleRelative(baseModule, relativePath.pData, mode);
        return is();
    }

    void SAL_CALL unload()
    {
        if (m_Module)
        {
            osl_unloadModule(m_Module);
            m_Module = 0;
        }
    }

	sal_Bool SAL_CALL is() const
    {
       	return m_Module != NULL; 
    }

    void* SAL_CALL getSymbol( const ::rtl::OUString& strSymbolName)
    {
	return ( osl_getSymbol( m_Module, strSymbolName.pData ) );
    }

    /** Get function address by the function name in the module.

        getFunctionSymbol is an alternative function for getSymbol. 
        Use Function pointer as symbol address to conceal type conversion.

        @param ustrFunctionSymbolName
        [in] Function name to be looked up.
   
        @return
        <dl>
        <dt>oslGenericFunction format function address</dt>
        <dd>on success</dd>
        <dt>NULL</dt>
        <dd>lookup failed or parameter is somewhat invalid</dd>
        </dl>
   
        @see getSymbol
    */
    oslGenericFunction SAL_CALL getFunctionSymbol( const ::rtl::OUString& ustrFunctionSymbolName )
    {
        return ( osl_getFunctionSymbol( m_Module, ustrFunctionSymbolName.pData ) );
    }

    operator oslModule() const
    {
        return m_Module;
    }

private:
    oslModule m_Module;

};

}

#endif