///////////////////////////////////////////////////////////////////////////

//

// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas

// Digital Ltd. LLC

// 

// 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,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

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

//

///////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------------

//

//	class ChannelListAttribute

//

//-----------------------------------------------------------------------------

#include <ImfChannelListAttribute.h>

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER

namespace {

template <size_t N>

void checkIsNullTerminated (const char (&str)[N], const char *what)

{

    for (size_t i = 0; i < N; ++i) {

        if (str[i] == '\0')

            return;

   }

    std::stringstream s;

    s << "Invalid " << what << ": it is more than " << (N - 1) 

      << " characters long.";

    throw IEX_NAMESPACE::InputExc(s);

}

} // namespace

template <>

const char *

ChannelListAttribute::staticTypeName ()

{

    return "chlist";

}

using namespace OPENEXR_IMF_INTERNAL_NAMESPACE;

template <>

void

ChannelListAttribute::writeValueTo (OStream &os, int version) const

{

    for (ChannelList::ConstIterator i = _value.begin();

	 i != _value.end();

	 ++i)

    {

	//

	// Write name

	//

	Xdr::write <StreamIO> (os, i.name());

	//

	// Write Channel struct

	//

	Xdr::write <StreamIO> (os, int (i.channel().type));

	Xdr::write <StreamIO> (os, i.channel().pLinear);

	Xdr::pad   <StreamIO> (os, 3);

	Xdr::write <StreamIO> (os, i.channel().xSampling);

	Xdr::write <StreamIO> (os, i.channel().ySampling);

    }

    //

    // Write end of list marker

    //

    Xdr::write <StreamIO> (os, "");

}

template <>

void

ChannelListAttribute::readValueFrom (IStream &is,

                                     int size,

                                     int version)

{

    while (true)

    {

	//

	// Read name; zero length name means end of channel list

	//

	char name[Name::SIZE];

	Xdr::read <StreamIO> (is,Name::MAX_LENGTH,name);

	if (name[0] == 0)

	    break;

	checkIsNullTerminated (name, "channel name");

	//

	// Read Channel struct

	//

	int type;

	bool pLinear;

	int xSampling;

	int ySampling;

	Xdr::read <StreamIO> (is, type);

	Xdr::read <StreamIO> (is, pLinear);

	Xdr::skip <StreamIO> (is, 3);

	Xdr::read <StreamIO> (is, xSampling);

	Xdr::read <StreamIO> (is, ySampling);

	_value.insert (name, Channel (PixelType (type),

	                              xSampling,

	                              ySampling,

	                              pLinear));

    }

}

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT