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

//

// Copyright (c) 2003-2012, 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.

//

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

#include <ImfVersion.h>

#include <ImfTestFile.h>

#include <ImfStdIO.h>

#include <iostream>

#include <exception>

#include <stdio.h>

#include <assert.h>

#ifndef ILM_IMF_TEST_IMAGEDIR

    #define ILM_IMF_TEST_IMAGEDIR

#endif

using namespace OPENEXR_IMF_NAMESPACE;

using namespace std;

namespace {

void

testFile1 (const char fileName[], bool isImfFile)

{

    cout << fileName << " " << flush;

    ifstream f (fileName, ios_base::binary);

    assert (!!f);

    char bytes[4];

    f.read (bytes, sizeof (bytes));

    assert (!!f && isImfFile == isImfMagic (bytes));

    cout << "is " << (isImfMagic (bytes)? "": "not ") << "an OpenEXR file\n";

}

void

testFile2 (const char fileName[], bool exists, bool exrFile, bool tiledFile)

{

    cout << fileName << " " << flush;

    bool exr, tiled;

    exr = isOpenExrFile (fileName, tiled);

    assert (exr == exrFile && tiled == tiledFile);

    exr = isOpenExrFile (fileName);

    assert (exr == exrFile);

    tiled = isTiledOpenExrFile (fileName);

    assert (tiled == tiledFile);

    if (exists)

    {

	StdIFStream is (fileName);

	exr = isOpenExrFile (is, tiled);

	assert (exr == exrFile && tiled == tiledFile);

	if (exr)

	    assert (is.tellg() == 0);

	exr = isOpenExrFile (is);

	assert (exr == exrFile);

	if (exr)

	    assert (is.tellg() == 0);

	tiled = isTiledOpenExrFile (is);

	assert (tiled == tiledFile);

	if (tiled)

	    assert (is.tellg() == 0);

    }

    cout << (exists? "exists": "does not exist") << ", " <<

	    (exrFile? "is an OpenEXR file": "is not an OpenEXR file") << ", " <<

	    (tiledFile? "is tiled": "is not tiled") << endl;

}

} // namespace

void

testMagic (const std::string &)

{

    try

    {

	cout << "Testing magic number" << endl;

	testFile1 (ILM_IMF_TEST_IMAGEDIR "comp_none.exr", true);

	testFile1 (ILM_IMF_TEST_IMAGEDIR "invalid.exr", false);

	testFile2 (ILM_IMF_TEST_IMAGEDIR "tiled.exr", true, true, true);

	testFile2 (ILM_IMF_TEST_IMAGEDIR "comp_none.exr", true, true, false);

	testFile2 (ILM_IMF_TEST_IMAGEDIR "invalid.exr", true, false, false);

	testFile2 (ILM_IMF_TEST_IMAGEDIR "does_not_exist.exr", false, false, false);

	cout << "ok\n" << endl;

    }

    catch (const std::exception &e)

    {

	cerr << "ERROR -- caught exception: " << e.what() << endl;

	assert (false);

    }

}