//-*****************************************************************************

//

// Copyright (c) 2009-2012,

//  Sony Pictures Imageworks Inc. and

//  Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.

//

// All rights reserved.

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

// *       Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

// *       Redistributions in binary form must reproduce the above

// copyright notice, this list of conditions and the following disclaimer

// in the documentation and/or other materials provided with the

// distribution.

// *       Neither the name of Industrial Light & Magic nor the names of

// its contributors may be used to endorse or promote products derived

// from this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

//-*****************************************************************************

//-*****************************************************************************

//! \file Alembic/Util/TokenMap.cpp

//! \brief The body file containing the class implementation for

//!     the \ref Alembic::Util::TokenMap class

//-*****************************************************************************

#include <Alembic/Util/TokenMap.h>

namespace Alembic {

namespace Util {

namespace ALEMBIC_VERSION_NS {

//-*****************************************************************************

void TokenMap::set( const std::string &config,

                    char pairSep,

                    char assignSep )

{

    std::size_t lastPair = 0;

    while(1)

    {

        std::size_t curPair = config.find(pairSep, lastPair);

        std::size_t curAssign = config.find(assignSep, lastPair);

        if (curAssign != std::string::npos)

        {

            std::size_t endPos = std::string::npos;

            if (curPair != endPos)

            {

                endPos = curPair - curAssign - 1;

            }

            m_map[config.substr(lastPair, curAssign - lastPair)] =

                config.substr(curAssign + 1, endPos);

        }

        if (curPair == std::string::npos)

        {

            return;

        }

        lastPair = curPair + 1;

    }

}

//-*****************************************************************************

void TokenMap::setUnique( const std::string &config,

                          char pairSep,

                          char assignSep,

                          bool quiet )

{

    std::size_t lastPair = 0;

    while(1)

    {

        std::size_t curPair = config.find(pairSep, lastPair);

        std::size_t curAssign = config.find(assignSep, lastPair);

        if (curAssign > curPair)

        {

            if ( !quiet )

            {

                ALEMBIC_THROW( "TokenMap::setUnique: malformed string found:"

                    << assignSep << " before: " << pairSep);

            }

            return;

        }

        if (curAssign != std::string::npos)

        {

            std::size_t endPos = std::string::npos;

            if (curPair != endPos)

            {

                endPos = curPair - curAssign - 1;

            }

            std::string keyStr = config.substr(lastPair, curAssign - lastPair);

            if ( m_map.count( keyStr ) > 0 )

            {

                if ( !quiet )

                {

                    ALEMBIC_THROW( "TokenMap::setUnique: token: "

                                   << keyStr << " is not unique." );

                }

            }

            else

            {

                m_map[keyStr] = config.substr(curAssign + 1, endPos);

            }

        }

        if (curPair == std::string::npos)

        {

            return;

        }

        lastPair = curPair + 1;

    }

}

//-*****************************************************************************

std::string TokenMap::get( char pairSep,

                           char assignSep,

                           bool check ) const

{

    char buf[2] = { 0, 0 };

    buf[0] = pairSep;

    std::string pairSepStr( ( const char * )buf );

    buf[0] = assignSep;

    std::string assignSepStr( ( const char * )buf );

    std::stringstream output;

    bool start = true;

    for ( const_iterator iter = m_map.begin();

          iter != m_map.end(); ++iter )

    {

        std::string token = (*iter).first;

        std::string value = (*iter).second;

        if ( check &&

             ( token.find( pairSep ) != std::string::npos ||

               token.find( assignSep ) != std::string::npos ||

               value.find( pairSep ) != std::string::npos ||

               value.find( assignSep ) != std::string::npos ) )

        {

            ALEMBIC_THROW( "TokenMap::get: Token-Value pair " <<

                " contains separator characters: " <<

                pairSepStr << " or " << assignSepStr <<

                " for " << token << " or "  << value);

        }

        if ( value == "" )

        {

            continue;

        }

        if ( !start )

        {

            output << pairSepStr;

        }

        output << token << assignSepStr << value;

        start = false;

    }

    return output.str();

}

} // End namespace ALEMBIC_VERSION_NS

} // End namespace Util

} // End namespace Alembic