OpenSystemsDevelopment / qpdf

// This program tests miscellaneous functionality in the qpdf library
// that we don't want to pollute the qpdf program with.

#include <qpdf/QPDF.hh>

#include <qpdf/QPDFPageDocumentHelper.hh>
#include <qpdf/QPDFPageObjectHelper.hh>
#include <qpdf/QPDFAcroFormDocumentHelper.hh>
#include <qpdf/QPDFNumberTreeObjectHelper.hh>
#include <qpdf/QPDFNameTreeObjectHelper.hh>
#include <qpdf/QPDFPageLabelDocumentHelper.hh>
#include <qpdf/QPDFOutlineDocumentHelper.hh>
#include <qpdf/QUtil.hh>
#include <qpdf/QTC.hh>
#include <qpdf/Pl_StdioFile.hh>
#include <qpdf/Pl_Buffer.hh>
#include <qpdf/Pl_Flate.hh>
#include <qpdf/QPDFWriter.hh>
#include <qpdf/QPDFSystemError.hh>
#include <qpdf/QIntC.hh>
#include <iostream>
#include <sstream>
#include <algorithm>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <map>

static char const* whoami = 0;

void usage()
{
    std::cerr << "Usage: " << whoami << " n filename1 [arg2]"
              << std::endl;
    exit(2);
}

class Provider: public QPDFObjectHandle::StreamDataProvider
{
  public:
    Provider(PointerHolder<Buffer> b) :
	b(b),
	bad_length(false)
    {
    }
    virtual ~Provider()
    {
    }
    virtual void provideStreamData(int objid, int generation,
				   Pipeline* p)
    {
	p->write(b->getBuffer(), b->getSize());
	if (this->bad_length)
	{
	    unsigned char ch = ' ';
	    p->write(&ch, 1);
	}
	p->finish();
    }
    void badLength(bool v)
    {
	this->bad_length = v;
    }

  private:
    PointerHolder<Buffer> b;
    bool bad_length;
};

class ParserCallbacks: public QPDFObjectHandle::ParserCallbacks
{
  public:
    virtual ~ParserCallbacks()
    {
    }

    virtual void contentSize(size_t size);
    virtual void handleObject(QPDFObjectHandle, size_t, size_t);
    virtual void handleEOF();
};

void
ParserCallbacks::contentSize(size_t size)
{
    std::cout << "content size: " << size << std::endl;
}

void
ParserCallbacks::handleObject(QPDFObjectHandle obj,
                              size_t offset, size_t length)
{
    if (obj.isName() && (obj.getName() == "/Abort"))
    {
        std::cout << "test suite: terminating parsing" << std::endl;
        terminateParsing();
    }
    std::cout << obj.getTypeName() << ", offset=" << offset
              << ", length=" << length << ": ";
    if (obj.isInlineImage())
    {
        // Exercise getTypeCode
        assert(obj.getTypeCode() == QPDFObject::ot_inlineimage);
        std::cout << QUtil::hex_encode(obj.getInlineImageValue()) << std::endl;
    }
    else
    {
        std::cout << obj.unparse() << std::endl;
    }
}

void
ParserCallbacks::handleEOF()
{
    std::cout << "-EOF-" << std::endl;
}

class TokenFilter: public QPDFObjectHandle::TokenFilter
{
  public:
    TokenFilter()
    {
    }
    virtual ~TokenFilter()
    {
    }
    virtual void handleToken(QPDFTokenizer::Token const& t)
    {
        if (t == QPDFTokenizer::Token(QPDFTokenizer::tt_string, "Potato"))
        {
            // Exercise unparsing of strings by token constructor
            writeToken(
                QPDFTokenizer::Token(QPDFTokenizer::tt_string, "Salad"));
        }
        else
        {
            writeToken(t);
        }
    }
    virtual void handleEOF()
    {
        writeToken(QPDFTokenizer::Token(QPDFTokenizer::tt_name, "/bye"));
        write("\n");
    }
};

static std::string getPageContents(QPDFObjectHandle page)
{
    PointerHolder<Buffer> b1 =
        page.getKey("/Contents").getStreamData();
    return std::string(
        reinterpret_cast<char *>(b1->getBuffer()), b1->getSize()) + "\0";
}

static void checkPageContents(QPDFObjectHandle page,
                              std::string const& wanted_string)
{
    std::string contents = getPageContents(page);
    if (contents.find(wanted_string) == std::string::npos)
    {
        std::cout << "didn't find " << wanted_string << " in "
                  << contents << std::endl;
    }
}

static QPDFObjectHandle createPageContents(QPDF& pdf, std::string const& text)
{
    std::string contents = "BT /F1 15 Tf 72 720 Td (" + text + ") Tj ET\n";
    return QPDFObjectHandle::newStream(&pdf, contents);
}

static void print_rect(std::ostream& out,
                       QPDFObjectHandle::Rectangle const& r)
{
    out << "[" << r.llx << ", " << r.lly << ", "
        << r.urx << ", " << r.ury << "]";
}

#define assert_compare_numbers(expected, expr) \
    compare_numbers(#expr, expected, expr)

template <typename T1, typename T2>
static void compare_numbers(
    char const* description, T1 const& expected, T2 const& actual)
{
    if (expected != actual)
    {
        std::cerr << description << ": expected = " << expected
                  << "; actual = " << actual << std::endl;
    }
}

void runtest(int n, char const* filename1, char const* arg2)
{
    // Most tests here are crafted to work on specific files.  Look at
    // the test suite to see how the test is invoked to find the file
    // that the test is supposed to operate on.

    if (n == 0)
    {
        // Throw in some random test cases that don't fit anywhere
        // else.  This is in addition to whatever else is going on in
        // test 0.

        // The code to trim user passwords looks for 0x28 (which is
        // "(") since it marks the beginning of the padding.  Exercise
        // the code to make sure it skips over 0x28 characters that
        // aren't part of padding.
        std::string password(
            "1234567890123456789012(45678\x28\xbf\x4e\x5e");
        assert(password.length() == 32);
        QPDF::trim_user_password(password);
        assert(password == "1234567890123456789012(45678");

        QPDFObjectHandle uninitialized;
        assert(uninitialized.getTypeCode() == QPDFObject::ot_uninitialized);
        assert(strcmp(uninitialized.getTypeName(), "uninitialized") == 0);
    }

    QPDF pdf;
    PointerHolder<char> file_buf;
    FILE* filep = 0;
    if (n == 0)
    {
	pdf.setAttemptRecovery(false);
    }
    if (((n == 35) || (n == 36)) && (arg2 != 0))
    {
        // arg2 is password
	pdf.processFile(filename1, arg2);
    }
    else if (n == 45)
    {
        // Decode obfuscated files. To obfuscated, run the input file
        // through this perl script, and save the result to
        // filename.obfuscated. This pretends that the input was
        // called filename.pdf and that that file contained the
        // deobfuscated version.

        // undef $/;
        // my @str = split('', <STDIN>);
        // for (my $i = 0; $i < scalar(@str); ++$i)
        // {
        //     $str[$i] = chr(ord($str[$i]) ^ 0xcc);
        // }
        // print(join('', @str));

        std::string filename(std::string(filename1) + ".obfuscated");
        size_t size = 0;
        QUtil::read_file_into_memory(filename.c_str(), file_buf, size);
        char* p = file_buf.getPointer();
        for (size_t i = 0; i < size; ++i)
        {
            p[i] = static_cast<char>(p[i] ^ 0xcc);
        }
	pdf.processMemoryFile((std::string(filename1) + ".pdf").c_str(),
                              p, size);
    }
    else if (n == 61)
    {
        // Ignore filename argument entirely
    }
    else if (n % 2 == 0)
    {
        if (n % 4 == 0)
        {
	    QTC::TC("qpdf", "exercise processFile(name)");
            pdf.processFile(filename1);
        }
        else
        {
	    QTC::TC("qpdf", "exercise processFile(FILE*)");
            filep = QUtil::safe_fopen(filename1, "rb");
            pdf.processFile(filename1, filep, false);
        }
    }
    else
    {
        QTC::TC("qpdf", "exercise processMemoryFile");
        size_t size = 0;
        QUtil::read_file_into_memory(filename1, file_buf, size);
	pdf.processMemoryFile(filename1, file_buf.getPointer(), size);
    }

    if ((n == 0) || (n == 1))
    {
	QPDFObjectHandle trailer = pdf.getTrailer();
	QPDFObjectHandle qtest = trailer.getKey("/QTest");

	if (! trailer.hasKey("/QTest"))
	{
	    // This will always happen when /QTest is null because
	    // hasKey returns false for null keys regardless of
	    // whether the key exists or not.  That way there's never
	    // any difference between a key that is present and null
	    // and a key that is absent.
	    QTC::TC("qpdf", "main QTest implicit");
	    std::cout << "/QTest is implicit" << std::endl;
	}

	QTC::TC("qpdf", "main QTest indirect",
		qtest.isIndirect() ? 1 : 0);
	std::cout << "/QTest is "
		  << (qtest.isIndirect() ? "in" : "")
		  << "direct and has type "
                  << qtest.getTypeName()
                  << " (" << qtest.getTypeCode() << ")" << std::endl;

	if (qtest.isNull())
	{
	    QTC::TC("qpdf", "main QTest null");
	    std::cout << "/QTest is null" << std::endl;
	}
	else if (qtest.isBool())
	{
	    QTC::TC("qpdf", "main QTest bool",
		    qtest.getBoolValue() ? 1 : 0);
	    std::cout << "/QTest is Boolean with value "
		      << (qtest.getBoolValue() ? "true" : "false")
		      << std::endl;
	}
	else if (qtest.isInteger())
	{
	    QTC::TC("qpdf", "main QTest int");
	    std::cout << "/QTest is an integer with value "
		      << qtest.getIntValue() << std::endl;
	}
	else if (qtest.isReal())
	{
	    QTC::TC("qpdf", "main QTest real");
	    std::cout << "/QTest is a real number with value "
		      << qtest.getRealValue() << std::endl;
	}
	else if (qtest.isName())
	{
	    QTC::TC("qpdf", "main QTest name");
	    std::cout << "/QTest is a name with value "
		      << qtest.getName() << std::endl;
	}
	else if (qtest.isString())
	{
	    QTC::TC("qpdf", "main QTest string");
	    std::cout << "/QTest is a string with value "
		      << qtest.getStringValue() << std::endl;
	}
	else if (qtest.isArray())
	{
	    QTC::TC("qpdf", "main QTest array");
	    std::cout << "/QTest is an array with "
		      << qtest.getArrayNItems() << " items" << std::endl;
            int i = 0;
	    for (auto& iter: QPDFArrayItems(qtest))
	    {
		QTC::TC("qpdf", "main QTest array indirect",
			iter.isIndirect() ? 1 : 0);
		std::cout << "  item " << i << " is "
			  << (iter.isIndirect() ? "in" : "")
			  << "direct" << std::endl;
                ++i;
	    }
	}
	else if (qtest.isDictionary())
	{
	    QTC::TC("qpdf", "main QTest dictionary");
	    std::cout << "/QTest is a dictionary" << std::endl;
            for (auto& iter: QPDFDictItems(qtest))
            {
		QTC::TC("qpdf", "main QTest dictionary indirect",
			iter.second.isIndirect() ? 1 : 0);
		std::cout << "  " << iter.first << " is "
			  << (iter.second.isIndirect() ? "in" : "")
			  << "direct" << std::endl;
	    }
	}
	else if (qtest.isStream())
	{
	    QTC::TC("qpdf", "main QTest stream");
	    std::cout << "/QTest is a stream.  Dictionary: "
		      << qtest.getDict().unparse() << std::endl;

	    std::cout << "Raw stream data:" << std::endl;
	    std::cout.flush();
	    QUtil::binary_stdout();
	    PointerHolder<Pl_StdioFile> out = new Pl_StdioFile("raw", stdout);
	    qtest.pipeStreamData(out.getPointer(), 0, qpdf_dl_none);

	    std::cout << std::endl << "Uncompressed stream data:" << std::endl;
	    if (qtest.pipeStreamData(0, 0, qpdf_dl_all))
	    {
		std::cout.flush();
		QUtil::binary_stdout();
		out = new Pl_StdioFile("filtered", stdout);
		qtest.pipeStreamData(out.getPointer(), 0, qpdf_dl_all);
		std::cout << std::endl << "End of stream data" << std::endl;
	    }
	    else
	    {
		std::cout << "Stream data is not filterable." << std::endl;
	    }
	}
	else
	{
	    // Should not happen!
	    std::cout << "/QTest is an unknown object" << std::endl;
	}

	std::cout << "unparse: " << qtest.unparse() << std::endl
		  << "unparseResolved: " << qtest.unparseResolved()
		  << std::endl;
    }
    else if (n == 2)
    {
	// Encrypted file.  This test case is designed for a specific
	// PDF file.

	QPDFObjectHandle trailer = pdf.getTrailer();
	std::cout << trailer.getKey("/Info").
	    getKey("/CreationDate").getStringValue() << std::endl;
	std::cout << trailer.getKey("/Info").
	    getKey("/Producer").getStringValue() << std::endl;

	QPDFObjectHandle encrypt = trailer.getKey("/Encrypt");
	std::cout << encrypt.getKey("/O").unparse() << std::endl;
	std::cout << encrypt.getKey("/U").unparse() << std::endl;

	QPDFObjectHandle root = pdf.getRoot();
	QPDFObjectHandle pages = root.getKey("/Pages");
	QPDFObjectHandle kids = pages.getKey("/Kids");
	QPDFObjectHandle page = kids.getArrayItem(1); // second page
	QPDFObjectHandle contents = page.getKey("/Contents");
	QUtil::binary_stdout();
	PointerHolder<Pl_StdioFile> out = new Pl_StdioFile("filtered", stdout);
	contents.pipeStreamData(out.getPointer(), 0, qpdf_dl_generalized);
    }
    else if (n == 3)
    {
	QPDFObjectHandle streams = pdf.getTrailer().getKey("/QStreams");
	for (int i = 0; i < streams.getArrayNItems(); ++i)
	{
	    QPDFObjectHandle stream = streams.getArrayItem(i);
	    std::cout << "-- stream " << i << " --" << std::endl;
	    std::cout.flush();
	    QUtil::binary_stdout();
	    PointerHolder<Pl_StdioFile> out =
		new Pl_StdioFile("tokenized stream", stdout);
	    stream.pipeStreamData(out.getPointer(),
                                  qpdf_ef_normalize, qpdf_dl_generalized);
	}
    }
    else if (n == 4)
    {
	// Mutability testing: Make /QTest direct recursively, then
	// copy to /Info.  Also make some other mutations so we can
	// tell the difference and ensure that the original /QTest
	// isn't effected.
	QPDFObjectHandle trailer = pdf.getTrailer();
	QPDFObjectHandle qtest = trailer.getKey("/QTest");
	qtest.makeDirect();
	qtest.removeKey("/Subject");
	qtest.replaceKey("/Author",
			 QPDFObjectHandle::newString("Mr. Potato Head"));
	// qtest.A and qtest.B.A were originally the same object.
	// They no longer are after makeDirect().  Mutate one of them
	// and ensure the other is not changed.  These test cases are
	// crafted around a specific set of input files.
        QPDFObjectHandle A = qtest.getKey("/A");
        if (A.getArrayItem(0).getIntValue() == 1)
        {
            // Test mutators
            A.setArrayItem(1, QPDFObjectHandle::newInteger(5)); // 1 5 3
            A.insertItem(2, QPDFObjectHandle::newInteger(10)); // 1 5 10 3
            A.appendItem(QPDFObjectHandle::newInteger(12)); // 1 5 10 3 12
            A.eraseItem(3); // 1 5 10 12
            A.insertItem(4, QPDFObjectHandle::newInteger(6)); // 1 5 10 12 6
            A.insertItem(0, QPDFObjectHandle::newInteger(9)); // 9 1 5 10 12 6
        }
        else
        {
            std::vector<QPDFObjectHandle> items;
            items.push_back(QPDFObjectHandle::newInteger(14));
            items.push_back(QPDFObjectHandle::newInteger(15));
            items.push_back(QPDFObjectHandle::newInteger(9));
            A.setArrayFromVector(items);
        }

        QPDFObjectHandle qtest2 = trailer.getKey("/QTest2");
        if (! qtest2.isNull())
        {
            // Test allow_streams=true
            qtest2.makeDirect(true);
            trailer.replaceKey("/QTest2", qtest2);
        }

	trailer.replaceKey("/Info", pdf.makeIndirectObject(qtest));
	QPDFWriter w(pdf, 0);
	w.setQDFMode(true);
	w.setStaticID(true);
	w.write();

	// Prevent "done" message from getting appended
	exit(0);
    }
    else if (n == 5)
    {
        QPDFPageDocumentHelper dh(pdf);
	std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
	int pageno = 0;
	for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
	     iter != pages.end(); ++iter)
	{
	    QPDFPageObjectHelper& page(*iter);
	    ++pageno;

	    std::cout << "page " << pageno << ":" << std::endl;

	    std::cout << "  images:" << std::endl;
	    std::map<std::string, QPDFObjectHandle> images = page.getImages();
	    for (auto const& iter2: images)
	    {
		std::string const& name = iter2.first;
		QPDFObjectHandle image = iter2.second;
		QPDFObjectHandle dict = image.getDict();
		long long width = dict.getKey("/Width").getIntValue();
		long long height = dict.getKey("/Height").getIntValue();
		std::cout << "    " << name
			  << ": " << width << " x " << height
			  << std::endl;
	    }

	    std::cout << "  content:" << std::endl;
	    std::vector<QPDFObjectHandle> content = page.getPageContents();
	    for (auto& iter2: content)
	    {
		std::cout << "    " << iter2.unparse() << std::endl;
	    }

	    std::cout << "end page " << pageno << std::endl;
	}

	QPDFObjectHandle root = pdf.getRoot();
	QPDFObjectHandle qstrings = root.getKey("/QStrings");
	if (qstrings.isArray())
	{
	    std::cout << "QStrings:" << std::endl;
	    int nitems = qstrings.getArrayNItems();
	    for (int i = 0; i < nitems; ++i)
	    {
		std::cout << qstrings.getArrayItem(i).getUTF8Value()
			  << std::endl;
	    }
	}

	QPDFObjectHandle qnumbers = root.getKey("/QNumbers");
	if (qnumbers.isArray())
	{
	    std::cout << "QNumbers:" << std::endl;
	    int nitems = qnumbers.getArrayNItems();
	    for (int i = 0; i < nitems; ++i)
	    {
		std::cout << QUtil::double_to_string(
		    qnumbers.getArrayItem(i).getNumericValue(), 3)
			  << std::endl;
	    }
	}
    }
    else if (n == 6)
    {
	QPDFObjectHandle root = pdf.getRoot();
	QPDFObjectHandle metadata = root.getKey("/Metadata");
	if (! metadata.isStream())
	{
	    throw std::logic_error("test 6 run on file with no metadata");
	}
	Pl_Buffer bufpl("buffer");
	metadata.pipeStreamData(&bufpl, 0, qpdf_dl_none);
	Buffer* buf = bufpl.getBuffer();
	unsigned char const* data = buf->getBuffer();
	bool cleartext = false;
	if ((buf->getSize() > 9) &&
	    (strncmp(reinterpret_cast<char const*>(data),
                     "<?xpacket", 9) == 0))
	{
	    cleartext = true;
	}
	delete buf;
	std::cout << "encrypted="
		  << (pdf.isEncrypted() ? 1 : 0)
		  << "; cleartext="
		  << (cleartext ? 1 : 0)
		  << std::endl;
    }
    else if (n == 7)
    {
	QPDFObjectHandle root = pdf.getRoot();
	QPDFObjectHandle qstream = root.getKey("/QStream");
	if (! qstream.isStream())
	{
	    throw std::logic_error("test 7 run on file with no QStream");
	}
	qstream.replaceStreamData(
	    "new data for stream\n",
            QPDFObjectHandle::newNull(), QPDFObjectHandle::newNull());
	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 8)
    {
	QPDFObjectHandle root = pdf.getRoot();
	QPDFObjectHandle qstream = root.getKey("/QStream");
	if (! qstream.isStream())
	{
	    throw std::logic_error("test 7 run on file with no QStream");
	}
	Pl_Buffer p1("buffer");
	Pl_Flate p2("compress", &p1, Pl_Flate::a_deflate);
	p2.write(QUtil::unsigned_char_pointer("new data for stream\n"),
                 20); // no null!
	p2.finish();
	PointerHolder<Buffer> b = p1.getBuffer();
	// This is a bogus way to use StreamDataProvider, but it does
	// adequately test its functionality.
	Provider* provider = new Provider(b);
	PointerHolder<QPDFObjectHandle::StreamDataProvider> p = provider;
	qstream.replaceStreamData(
	    p, QPDFObjectHandle::newName("/FlateDecode"),
	    QPDFObjectHandle::newNull());
	provider->badLength(false);
	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
        // Linearize to force the provider to be called multiple times.
        w.setLinearization(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();

        // Every time a provider pipes stream data, it has to provide
        // the same amount of data.
	provider->badLength(true);
	try
	{
	    qstream.getStreamData();
	    std::cout << "oops -- getStreamData didn't throw" << std::endl;
	}
        catch (std::exception const& e)
	{
	    std::cout << "exception: " << e.what() << std::endl;
	}
    }
    else if (n == 9)
    {
	QPDFObjectHandle root = pdf.getRoot();
        // Explicitly exercise the Buffer version of newStream
	PointerHolder<Buffer> buf = new Buffer(20);
	unsigned char* bp = buf->getBuffer();
	memcpy(bp, "data for new stream\n", 20); // no null!
	QPDFObjectHandle qstream = QPDFObjectHandle::newStream(
            &pdf, buf);
	QPDFObjectHandle rstream = QPDFObjectHandle::newStream(&pdf);
	try
	{
	    rstream.getStreamData();
	    std::cout << "oops -- getStreamData didn't throw" << std::endl;
	}
	catch (std::logic_error const& e)
	{
	    std::cout << "exception: " << e.what() << std::endl;
	}
	rstream.replaceStreamData(
	    "data for other stream\n",
            QPDFObjectHandle::newNull(), QPDFObjectHandle::newNull());
	root.replaceKey("/QStream", qstream);
	root.replaceKey("/RStream", rstream);
	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 10)
    {
	std::vector<QPDFPageObjectHelper> pages =
            QPDFPageDocumentHelper(pdf).getAllPages();
        QPDFPageObjectHelper& ph(pages.at(0));
	ph.addPageContents(
            QPDFObjectHandle::newStream(
                &pdf, "BT /F1 12 Tf 72 620 Td (Baked) Tj ET\n"), true);
	ph.addPageContents(
            QPDFObjectHandle::newStream(
                &pdf, "BT /F1 18 Tf 72 520 Td (Mashed) Tj ET\n"), false);

	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 11)
    {
	QPDFObjectHandle root = pdf.getRoot();
	QPDFObjectHandle qstream = root.getKey("/QStream");
	PointerHolder<Buffer> b1 = qstream.getStreamData();
	PointerHolder<Buffer> b2 = qstream.getRawStreamData();
	if ((b1->getSize() == 7) &&
	    (memcmp(b1->getBuffer(), "potato\n", 7) == 0))
	{
	    std::cout << "filtered stream data okay" << std::endl;
	}
	if ((b2->getSize() == 15) &&
	    (memcmp(b2->getBuffer(), "706F7461746F0A\n", 15) == 0))
	{
	    std::cout << "raw stream data okay" << std::endl;
	}
    }
    else if (n == 12)
    {
	pdf.setOutputStreams(0, 0);
	pdf.showLinearizationData();
    }
    else if (n == 13)
    {
	std::ostringstream out;
	std::ostringstream err;
	pdf.setOutputStreams(&out, &err);
	pdf.showLinearizationData();
	std::cout << "---output---" << std::endl
		  << out.str()
		  << "---error---" << std::endl
		  << err.str();
    }
    else if (n == 14)
    {
	// Exercise swap and replace.  This test case is designed for
	// a specific file.
	std::vector<QPDFObjectHandle> pages = pdf.getAllPages();
	if (pages.size() != 4)
	{
	    throw std::logic_error("test " + QUtil::int_to_string(n) +
				   " not called 4-page file");
	}
	// Swap pages 2 and 3
	pdf.swapObjects(pages.at(1).getObjGen(), pages.at(2).getObjGen());
	// Replace object and swap objects
	QPDFObjectHandle trailer = pdf.getTrailer();
	QPDFObjectHandle qdict = trailer.getKey("/QDict");
	QPDFObjectHandle qarray = trailer.getKey("/QArray");
	// Force qdict but not qarray to resolve
	qdict.isDictionary();
	QPDFObjectHandle new_dict = QPDFObjectHandle::newDictionary();
	new_dict.replaceKey("/NewDict", QPDFObjectHandle::newInteger(2));
	try
	{
	    // Do it wrong first...
	    pdf.replaceObject(qdict.getObjGen(), qdict);
	}
	catch (std::logic_error const&)
	{
	    std::cout << "caught logic error as expected" << std::endl;
	}
	pdf.replaceObject(qdict.getObjGen(), new_dict);
	// Now qdict still points to the old dictionary
	std::cout << "old dict: " << qdict.getKey("/Dict").getIntValue()
		  << std::endl;
	// Swap dict and array
	pdf.swapObjects(qdict.getObjGen(), qarray.getObjGen());
	// Now qarray will resolve to new object but qdict is still
	// the old object
	std::cout << "old dict: " << qdict.getKey("/Dict").getIntValue()
		  << std::endl;
	std::cout << "new dict: " << qarray.getKey("/NewDict").getIntValue()
		  << std::endl;
	// Reread qdict, now pointing to an array
	qdict = pdf.getObjectByObjGen(qdict.getObjGen());
	std::cout << "swapped array: " << qdict.getArrayItem(0).getName()
		  << std::endl;

	// Exercise getAsMap and getAsArray
	std::vector<QPDFObjectHandle> array_elements =
	    qdict.getArrayAsVector();
	std::map<std::string, QPDFObjectHandle> dict_items =
	    qarray.getDictAsMap();
	if ((array_elements.size() == 1) &&
	    (array_elements.at(0).getName() == "/Array") &&
	    (dict_items.size() == 1) &&
	    (dict_items["/NewDict"].getIntValue() == 2))
	{
	    std::cout << "array and dictionary contents are correct"
		      << std::endl;
	}

	// Exercise writing to memory buffer
        for (int i = 0; i < 2; ++i)
        {
            QPDFWriter w(pdf);
            w.setOutputMemory();
            // Exercise setOutputMemory with and without static ID
            w.setStaticID(i == 0);
            w.setStreamDataMode(qpdf_s_preserve);
            w.write();
            Buffer* b = w.getBuffer();
            std::string const filename = (i == 0 ? "a.pdf" : "b.pdf");
            FILE* f = QUtil::safe_fopen(filename.c_str(), "wb");
            fwrite(b->getBuffer(), b->getSize(), 1, f);
            fclose(f);
            delete b;
        }
    }
    else if (n == 15)
    {
        std::vector<QPDFObjectHandle> const& pages = pdf.getAllPages();
        // Reference to original page numbers for this test case are
        // numbered from 0.

        // Remove pages from various places, checking to make sure
        // that our pages reference is getting updated.
        assert(pages.size() == 10);
        pdf.removePage(pages.back()); // original page 9
        assert(pages.size() == 9);
        pdf.removePage(*pages.begin()); // original page 0
        assert(pages.size() == 8);
        checkPageContents(pages.at(4), "Original page 5");
        pdf.removePage(pages.at(4)); // original page 5
        assert(pages.size() == 7);
        checkPageContents(pages.at(4), "Original page 6");
        checkPageContents(pages.at(0), "Original page 1");
        checkPageContents(pages.at(6), "Original page 8");

        // Insert pages

        // Create some content streams.
        std::vector<QPDFObjectHandle> contents;
        contents.push_back(createPageContents(pdf, "New page 1"));
        contents.push_back(createPageContents(pdf, "New page 0"));
        contents.push_back(createPageContents(pdf, "New page 5"));
        contents.push_back(createPageContents(pdf, "New page 6"));
        contents.push_back(createPageContents(pdf, "New page 11"));
        contents.push_back(createPageContents(pdf, "New page 12"));

        // Create some page objects.  Start with an existing
        // dictionary and modify it.  Using the results of
        // getDictAsMap to create a new dictionary effectively creates
        // a shallow copy.
        QPDFObjectHandle page_template = pages.at(0);
        std::vector<QPDFObjectHandle> new_pages;
        for (std::vector<QPDFObjectHandle>::iterator iter = contents.begin();
             iter != contents.end(); ++iter)
        {
            // We will retain indirect object references to other
            // indirect objects other than page content.
            QPDFObjectHandle page = page_template.shallowCopy();
            page.replaceKey("/Contents", *iter);
            if (iter == contents.begin())
            {
                // leave direct
                new_pages.push_back(page);
            }
            else
            {
                new_pages.push_back(pdf.makeIndirectObject(page));
            }
        }

        // Now insert the pages
        pdf.addPage(new_pages.at(0), true);
        checkPageContents(pages.at(0), "New page 1");
        pdf.addPageAt(new_pages.at(1), true, pages.at(0));
        assert(pages.at(0).getObjGen() == new_pages.at(1).getObjGen());
        pdf.addPageAt(new_pages.at(2), true, pages.at(5));
        assert(pages.at(5).getObjGen() == new_pages.at(2).getObjGen());
        pdf.addPageAt(new_pages.at(3), false, pages.at(5));
        assert(pages.at(6).getObjGen() == new_pages.at(3).getObjGen());
        assert(pages.size() == 11);
        pdf.addPage(new_pages.at(4), false);
        assert(pages.at(11).getObjGen() == new_pages.at(4).getObjGen());
        pdf.addPageAt(new_pages.at(5), false, pages.back());
        assert(pages.size() == 13);
        checkPageContents(pages.at(0), "New page 0");
        checkPageContents(pages.at(1), "New page 1");
        checkPageContents(pages.at(5), "New page 5");
        checkPageContents(pages.at(6), "New page 6");
        checkPageContents(pages.at(11), "New page 11");
        checkPageContents(pages.at(12), "New page 12");

        // Exercise writing to FILE*
        FILE* out =  QUtil::safe_fopen("a.pdf", "wb");
	QPDFWriter w(pdf, "FILE* a.pdf", out, true);
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 16)
    {
        // Insert a page manually and then update the cache.
        std::vector<QPDFObjectHandle> const& all_pages = pdf.getAllPages();

        QPDFObjectHandle contents = createPageContents(pdf, "New page 10");
        QPDFObjectHandle page =
            pdf.makeIndirectObject(
                QPDFObjectHandle(all_pages.at(0)).shallowCopy());
        page.replaceKey("/Contents", contents);

        // Insert the page manually.
	QPDFObjectHandle root = pdf.getRoot();
	QPDFObjectHandle pages = root.getKey("/Pages");
	QPDFObjectHandle kids = pages.getKey("/Kids");
        page.replaceKey("/Parent", pages);
        pages.replaceKey(
            "/Count",
            QPDFObjectHandle::newInteger(
                1 + QIntC::to_longlong(all_pages.size())));
        kids.appendItem(page);
        assert(all_pages.size() == 10);
        pdf.updateAllPagesCache();
        assert(all_pages.size() == 11);
        assert(all_pages.back().getObjGen() == page.getObjGen());

	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 17)
    {
        // The input file to this test case has a duplicated page.
        QPDFObjectHandle page_kids =
            pdf.getRoot().getKey("/Pages").getKey("/Kids");
        assert(page_kids.getArrayItem(0).getObjGen() ==
               page_kids.getArrayItem(1).getObjGen());
        std::vector<QPDFObjectHandle> const& pages = pdf.getAllPages();
        assert(pages.size() == 3);
        assert(! (pages.at(0).getObjGen() == pages.at(1).getObjGen()));
        assert(QPDFObjectHandle(pages.at(0)).getKey("/Contents").getObjGen() ==
               QPDFObjectHandle(pages.at(1)).getKey("/Contents").getObjGen());
        pdf.removePage(pages.at(0));
        assert(pages.size() == 2);
        PointerHolder<Buffer> b = QPDFObjectHandle(pages.at(0)).
            getKey("/Contents").getStreamData();
        std::string contents = std::string(
            reinterpret_cast<char const*>(b->getBuffer()),
            b->getSize());
        assert(contents.find("page 0") != std::string::npos);
    }
    else if (n == 18)
    {
        // Remove a page and re-insert it in the same file.
        std::vector<QPDFObjectHandle> const& pages = pdf.getAllPages();

        // Remove pages from various places, checking to make sure
        // that our pages reference is getting updated.
        assert(pages.size() == 10);
        QPDFObjectHandle page5 = pages.at(5);
        pdf.removePage(page5);
        assert(pages.size() == 9);
        pdf.addPage(page5, false);
        assert(pages.size() == 10);
        assert(pages.back().getObjGen() == page5.getObjGen());

	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 19)
    {
        // Remove a page and re-insert it in the same file.
        QPDFPageDocumentHelper dh(pdf);
        std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();

        // Try to insert a page that's already there.
        dh.addPage(pages.at(5), false);
        std::cout << "you can't see this" << std::endl;
    }
    else if (n == 20)
    {
        // Shallow copy an array
	QPDFObjectHandle trailer = pdf.getTrailer();
	QPDFObjectHandle qtest = trailer.getKey("/QTest");
        QPDFObjectHandle copy = qtest.shallowCopy();
        // Append shallow copy of a scalar
        copy.appendItem(trailer.getKey("/Size").shallowCopy());
        trailer.replaceKey("/QTest2", copy);

	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 21)
    {
        // Try to shallow copy a stream
        std::vector<QPDFObjectHandle> const& pages = pdf.getAllPages();
        QPDFObjectHandle page = pages.at(0);
        QPDFObjectHandle contents = page.getKey("/Contents");
        contents.shallowCopy();
        std::cout << "you can't see this" << std::endl;
    }
    else if (n == 22)
    {
        // Try to remove a page we don't have
        QPDFPageDocumentHelper dh(pdf);
        std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
        QPDFPageObjectHelper& page = pages.at(0);
        dh.removePage(page);
        dh.removePage(page);
        std::cout << "you can't see this" << std::endl;
    }
    else if (n == 23)
    {
        QPDFPageDocumentHelper dh(pdf);
        std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
        dh.removePage(pages.back());
    }
    else if (n == 24)
    {
        // Test behavior of reserved objects
        QPDFObjectHandle res1 = QPDFObjectHandle::newReserved(&pdf);
        QPDFObjectHandle res2 = QPDFObjectHandle::newReserved(&pdf);
	QPDFObjectHandle trailer = pdf.getTrailer();
        trailer.replaceKey("Array1", res1);
        trailer.replaceKey("Array2", res2);

        QPDFObjectHandle array1 = QPDFObjectHandle::newArray();
        QPDFObjectHandle array2 = QPDFObjectHandle::newArray();
        array1.appendItem(res2);
        array1.appendItem(QPDFObjectHandle::newInteger(1));
        array2.appendItem(res1);
        array2.appendItem(QPDFObjectHandle::newInteger(2));
        // Make sure trying to ask questions about a reserved object
        // doesn't break it.
        if (res1.isArray())
        {
            std::cout << "oops -- res1 is an array" << std::endl;
        }
        if (res1.isReserved())
        {
            std::cout << "res1 is still reserved after checking if array"
                      << std::endl;
        }
        pdf.replaceReserved(res1, array1);
        if (res1.isReserved())
        {
            std::cout << "oops -- res1 is still reserved" << std::endl;
        }
        else
        {
            std::cout << "res1 is no longer reserved" << std::endl;
        }
        res1.assertArray();
        std::cout << "res1 is an array" << std::endl;

        try
        {
            res2.unparseResolved();
            std::cout << "oops -- didn't throw" << std::endl;
        }
        catch (std::logic_error const& e)
        {
            std::cout << "logic error: " << e.what() << std::endl;
        }
        try
        {
            res2.makeDirect();
            std::cout << "oops -- didn't throw" << std::endl;
        }
        catch (std::logic_error const& e)
        {
            std::cout << "logic error: " << e.what() << std::endl;
        }

        pdf.replaceReserved(res2, array2);

        res2.assertArray();
        std::cout << "res2 is an array" << std::endl;

        // Verify that the previously added reserved keys can be
        // dereferenced properly now
        int i1 = res1.getArrayItem(0).getArrayItem(1).getIntValueAsInt();
        int i2 = res2.getArrayItem(0).getArrayItem(1).getIntValueAsInt();
        if ((i1 == 2) && (i2 == 1))
        {
            std::cout << "circular access and lazy resolution worked" << std::endl;
        }

	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 25)
    {
        // The copy object tests are designed to work with a specific
        // file.  Look at the test suite for the file, and look at the
        // file for comments about the file's structure.

        // Copy qtest without crossing page boundaries.  Should get O1
        // and O2 and their streams but not O3 or any other pages.

        assert(arg2 != 0);
        {
            // Make sure original PDF is out of scope when we write.
            QPDF oldpdf;
            oldpdf.processFile(arg2);
            QPDFObjectHandle qtest = oldpdf.getTrailer().getKey("/QTest");
            pdf.getTrailer().replaceKey(
                "/QTest", pdf.copyForeignObject(qtest));
        }

	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 26)
    {
        // Copy the O3 page using addPage.  Copy qtest without
        // crossing page boundaries.  In addition to previous results,
        // should get page O3 but no other pages including the page
        // that O3 points to.  Also, inherited object will have been
        // pushed down and will be preserved.

        {
            // Make sure original PDF is out of scope when we write.
            assert(arg2 != 0);
            QPDF oldpdf;
            oldpdf.processFile(arg2);
            QPDFObjectHandle qtest = oldpdf.getTrailer().getKey("/QTest");
            QPDFObjectHandle O3 = qtest.getKey("/O3");
            QPDFPageDocumentHelper(pdf).addPage(O3, false);
            pdf.getTrailer().replaceKey(
                "/QTest", pdf.copyForeignObject(qtest));
        }

	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
	w.setStreamDataMode(qpdf_s_preserve);
	w.write();
    }
    else if (n == 27)
    {
        // Copy O3 and the page O3 refers to before copying qtest.
        // Should get qtest plus only the O3 page and the page that O3
        // points to. Inherited objects should be preserved. This test
        // also exercises copying from a stream that has a buffer and
        // a provider, including copying a provider multiple times. We
        // also exercise setImmediateCopyFrom.

        // Create a provider. The provider stays in scope.
	PointerHolder<QPDFObjectHandle::StreamDataProvider> p1;
        {
            // Local scope
            Pl_Buffer pl("buffer");
            pl.write(QUtil::unsigned_char_pointer("new data for stream\n"),
                      20); // no null!
            pl.finish();
            PointerHolder<Buffer> b = pl.getBuffer();
            Provider* provider = new Provider(b);
            p1 = provider;
        }
        // Create a stream that uses a provider in empty1 and copy it
        // to empty2. It is copied from empty2 to the final pdf.
        QPDF empty1;
        empty1.emptyPDF();
        QPDFObjectHandle s1 = QPDFObjectHandle::newStream(&empty1);
	s1.replaceStreamData(
	    p1, QPDFObjectHandle::newNull(), QPDFObjectHandle::newNull());
        QPDF empty2;
        empty2.emptyPDF();
	s1 = empty2.copyForeignObject(s1);
        {
            // Make sure some source PDFs are out of scope when we
            // write.

            PointerHolder<QPDFObjectHandle::StreamDataProvider> p2;
            // Create another provider. This one will go out of scope
            // along with its containing qpdf, which has
            // setImmediateCopyFrom(true).
            {
                // Local scope
                Pl_Buffer pl("buffer");
                pl.write(QUtil::unsigned_char_pointer(
                              "more data for stream\n"),
                          21); // no null!
                pl.finish();
                PointerHolder<Buffer> b = pl.getBuffer();
                Provider* provider = new Provider(b);
                p2 = provider;
            }
            QPDF empty3;
            empty3.emptyPDF();
            empty3.setImmediateCopyFrom(true);
            QPDFObjectHandle s3 = QPDFObjectHandle::newStream(&empty3);
            s3.replaceStreamData(
                p2, QPDFObjectHandle::newNull(), QPDFObjectHandle::newNull());
            assert(arg2 != 0);
            QPDF oldpdf;
            oldpdf.processFile(arg2);
            QPDFObjectHandle qtest = oldpdf.getTrailer().getKey("/QTest");
            QPDFObjectHandle O3 = qtest.getKey("/O3");
            QPDFPageDocumentHelper dh(pdf);
            dh.addPage(O3.getKey("/OtherPage"), false);
            dh.addPage(O3, false);
            QPDFObjectHandle s2 = QPDFObjectHandle::newStream(
                &oldpdf, "potato\n");
            pdf.getTrailer().replaceKey(
                "/QTest", pdf.copyForeignObject(qtest));
            pdf.getTrailer().replaceKey(
                "/QTest2", QPDFObjectHandle::newArray());
            pdf.getTrailer().getKey("/QTest2").appendItem(
                pdf.copyForeignObject(s1));
            pdf.getTrailer().getKey("/QTest2").appendItem(
                pdf.copyForeignObject(s2));
            pdf.getTrailer().getKey("/QTest2").appendItem(
                pdf.copyForeignObject(s3));
        }

	QPDFWriter w(pdf, "a.pdf");
	w.setStaticID(true);
        w.setCompressStreams(false);
        w.setDecodeLevel(qpdf_dl_generalized);
	w.write();
    }
    else if (n == 28)
    {
        // Copy foreign object errors
        try
        {
            pdf.copyForeignObject(pdf.getTrailer().getKey("/QTest"));
            std::cout << "oops -- didn't throw" << std::endl;
        }
        catch (std::logic_error const& e)
        {
            std::cout << "logic error: " << e.what() << std::endl;
        }
        try
        {
            pdf.copyForeignObject(QPDFObjectHandle::newInteger(1));
            std::cout << "oops -- didn't throw" << std::endl;
        }
        catch (std::logic_error const& e)
        {
            std::cout << "logic error: " << e.what() << std::endl;
        }
    }
    else if (n == 29)
    {
        // Detect mixed objects in QPDFWriter
        assert(arg2 != 0);
        QPDF other;
        other.processFile(arg2);
        // Should use copyForeignObject instead
        other.getTrailer().replaceKey(
            "/QTest", pdf.getTrailer().getKey("/QTest"));

        try
        {
            QPDFWriter w(other, "a.pdf");
            w.write();
            std::cout << "oops -- didn't throw" << std::endl;
        }
        catch (std::logic_error const& e)
        {
            std::cout << "logic error: " << e.what() << std::endl;
        }
    }
    else if (n == 30)
    {
        assert(arg2 != 0);
        QPDF encrypted;
        encrypted.processFile(arg2, "user");
        QPDFWriter w(pdf, "b.pdf");
	w.setStreamDataMode(qpdf_s_preserve);
        w.copyEncryptionParameters(encrypted);
	w.write();

        // Make sure the contents are actually the same
        QPDF final;
        final.processFile("b.pdf", "user");
        std::vector<QPDFObjectHandle> pages = pdf.getAllPages();
        std::string orig_contents = getPageContents(pages.at(0));
        pages = final.getAllPages();
        std::string new_contents = getPageContents(pages.at(0));
        if (orig_contents != new_contents)
        {
            std::cout << "oops -- page contents don't match" << std::endl
                      << "original:\n" << orig_contents
                      << "new:\n" << new_contents
                      << std::endl;
        }
    }
    else if (n == 31)
    {
        // Test object parsing from a string.  The input file is not used.

        QPDFObjectHandle o1 =
            QPDFObjectHandle::parse(
                "[/name 16059 3.14159 false\n"
                " << /key true /other [ (string1) (string2) ] >> null]");
        std::cout << o1.unparse() << std::endl;
        QPDFObjectHandle o2 = QPDFObjectHandle::parse("   12345 \f  ");
        assert(o2.isInteger() && (o2.getIntValue() == 12345));
        try
        {
            QPDFObjectHandle::parse("[1 0 R]", "indirect test");
            std::cout << "oops -- didn't throw" << std::endl;
        }
        catch (std::logic_error const& e)
        {
            std::cout << "logic error parsing indirect: " << e.what()
                      << std::endl;
        }
        try
        {
            QPDFObjectHandle::parse("0 trailing", "trailing test");
            std::cout << "oops -- didn't throw" << std::endl;
        }
        catch (std::runtime_error const& e)
        {
            std::cout << "trailing data: " << e.what()
                      << std::endl;
        }
    }
    else if (n == 32)
    {
        // Extra header text
        char const* filenames[] = {"a.pdf", "b.pdf", "c.pdf", "d.pdf"};
        for (int i = 0; i < 4; ++i)
        {
            bool linearized = ((i & 1) != 0);
            bool newline = ((i & 2) != 0);
            QPDFWriter w(pdf, filenames[i]);
            w.setStaticID(true);
            std::cout
                << "file: " << filenames[i] << std::endl
                << "linearized: " << (linearized ? "yes" : "no") << std::endl
                << "newline: " << (newline ? "yes" : "no") << std::endl;
            w.setLinearization(linearized);
            w.setExtraHeaderText(newline
                                 ? "%% Comment with newline\n"
                                 : "%% Comment\n% No newline");
            w.write();
        }
    }
    else if (n == 33)
    {
        // Test writing to a custom pipeline
        Pl_Buffer p("buffer");
        QPDFWriter w(pdf);
        w.setStaticID(true);
        w.setOutputPipeline(&p);
        w.write();
        PointerHolder<Buffer> b = p.getBuffer();
        FILE* f = QUtil::safe_fopen("a.pdf", "wb");
        fwrite(b->getBuffer(), b->getSize(), 1, f);
        fclose(f);
    }
    else if (n == 34)
    {
        // Look at Extensions dictionary
        std::cout << "version: " << pdf.getPDFVersion() << std::endl
                  << "extension level: " << pdf.getExtensionLevel() << std::endl
                  << pdf.getRoot().getKey("/Extensions").unparse() << std::endl;
    }
    else if (n == 35)
    {
        // Extract attachments

        std::map<std::string, PointerHolder<Buffer> > attachments;
        QPDFObjectHandle root = pdf.getRoot();
        QPDFObjectHandle names = root.getKey("/Names");
        QPDFObjectHandle embeddedFiles = names.getKey("/EmbeddedFiles");
        names = embeddedFiles.getKey("/Names");
        for (int i = 0; i < names.getArrayNItems(); ++i)
        {
            QPDFObjectHandle item = names.getArrayItem(i);
            if (item.isDictionary() &&
                item.getKey("/Type").isName() &&
                (item.getKey("/Type").getName() == "/Filespec") &&
                item.getKey("/EF").isDictionary() &&
                item.getKey("/EF").getKey("/F").isStream())
            {
                std::string filename = item.getKey("/F").getStringValue();
                QPDFObjectHandle stream = item.getKey("/EF").getKey("/F");
                attachments[filename] = stream.getStreamData();
            }
        }
        for (std::map<std::string, PointerHolder<Buffer> >::iterator iter =
                 attachments.begin(); iter != attachments.end(); ++iter)
        {
            std::string const& filename = (*iter).first;
            std::string data = std::string(
                reinterpret_cast<char const*>((*iter).second->getBuffer()),
                (*iter).second->getSize());
            bool is_binary = false;
            for (size_t i = 0; i < data.size(); ++i)
            {
                if ((data.at(i) < 0) || (data.at(i) > 126))
                {
                    is_binary = true;
                    break;
                }
            }
            if (is_binary)
            {
                std::string t;
                for (size_t i = 0;
                     i < std::min(data.size(), QIntC::to_size(20));
                     ++i)
                {
                    if ((data.at(i) >= 32) && (data.at(i) <= 126))
                    {
                        t += data.at(i);
                    }
                    else
                    {
                        t += ".";
                    }
                }
                t += " (" + QUtil::uint_to_string(data.size()) + " bytes)";
                data = t;
            }
            std::cout << filename << ":\n" << data << "--END--\n";
        }
    }
    else if (n == 36)
    {
        // Extract raw unfilterable attachment

        QPDFObjectHandle root = pdf.getRoot();
        QPDFObjectHandle names = root.getKey("/Names");
        QPDFObjectHandle embeddedFiles = names.getKey("/EmbeddedFiles");
        names = embeddedFiles.getKey("/Names");
        for (int i = 0; i < names.getArrayNItems(); ++i)
        {
            QPDFObjectHandle item = names.getArrayItem(i);
            if (item.isDictionary() &&
                item.getKey("/Type").isName() &&
                (item.getKey("/Type").getName() == "/Filespec") &&
                item.getKey("/EF").isDictionary() &&
                item.getKey("/EF").getKey("/F").isStream() &&
                (item.getKey("/F").getStringValue() == "attachment1.txt"))
            {
                std::string filename = item.getKey("/F").getStringValue();
                QPDFObjectHandle stream = item.getKey("/EF").getKey("/F");
                Pl_Buffer p1("buffer");
                Pl_Flate p2("compress", &p1, Pl_Flate::a_inflate);
                stream.pipeStreamData(&p2, 0, qpdf_dl_none);
                PointerHolder<Buffer> buf = p1.getBuffer();
                std::string data = std::string(
                    reinterpret_cast<char const*>(buf->getBuffer()),
                    buf->getSize());
                std::cout << stream.getDict().unparse()
                          << filename << ":\n" << data << "--END--\n";
            }
        }
    }
    else if (n == 37)
    {
        // Parse content streams of all pages
        std::vector<QPDFPageObjectHelper> pages =
            QPDFPageDocumentHelper(pdf).getAllPages();
        for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
             iter != pages.end(); ++iter)
        {
            QPDFPageObjectHelper& page(*iter);
            ParserCallbacks cb;
            page.parseContents(&cb);
        }
    }
    else if (n == 38)
    {
        // Designed for override-compressed-object.pdf
        QPDFObjectHandle qtest = pdf.getRoot().getKey("/QTest");
        for (int i = 0; i < qtest.getArrayNItems(); ++i)
        {
            std::cout << qtest.getArrayItem(i).unparseResolved() << std::endl;
        }
    }
    else if (n == 39)
    {
        // Display image filter and color set for each image on each page
        std::vector<QPDFPageObjectHelper> pages =
            QPDFPageDocumentHelper(pdf).getAllPages();
        int pageno = 0;
        for (std::vector<QPDFPageObjectHelper>::iterator p_iter =
                 pages.begin();
             p_iter != pages.end(); ++p_iter)
        {
            std::cout << "page " << ++pageno << std::endl;
	    std::map<std::string, QPDFObjectHandle> images =
		(*p_iter).getImages();
	    for (std::map<std::string, QPDFObjectHandle>::iterator i_iter =
		     images.begin(); i_iter != images.end(); ++i_iter)
	    {
                QPDFObjectHandle image_dict = (*i_iter).second.getDict();
                std::cout << "filter: "
                          << image_dict.getKey("/Filter").unparseResolved()
                          << ", color space: "
                          << image_dict.getKey("/ColorSpace").unparseResolved()
                          << std::endl;
            }
        }
    }
    else if (n == 40)
    {
        // Write PCLm. This requires specially crafted PDF files. This
        // feature was implemented by Sahil Arora
        // <sahilarora.535@gmail.com> as part of a Google Summer of
        // Code project in 2017.
        assert(arg2 != 0);
        QPDFWriter w(pdf, arg2);
        w.setPCLm(true);
        w.setStaticID(true);
        w.write();
    }
    else if (n == 41)
    {
        // Apply a token filter. This test case is crafted to work
        // with coalesce.pdf.
        std::vector<QPDFPageObjectHelper> pages =
            QPDFPageDocumentHelper(pdf).getAllPages();
        for (std::vector<QPDFPageObjectHelper>::iterator iter =
                 pages.begin();
             iter != pages.end(); ++iter)
        {
            (*iter).addContentTokenFilter(new TokenFilter);
        }
        QPDFWriter w(pdf, "a.pdf");
	w.setQDFMode(true);
        w.setStaticID(true);
        w.write();
    }
    else if (n == 42)
    {
        // Access objects as wrong type. This test case is crafted to
        // work with object-types.pdf.
        QPDFObjectHandle qtest = pdf.getTrailer().getKey("/QTest");
        QPDFObjectHandle array = qtest.getKey("/Dictionary").getKey("/Key2");
        QPDFObjectHandle dictionary = qtest.getKey("/Dictionary");
        QPDFObjectHandle integer = qtest.getKey("/Integer");
        QPDFObjectHandle null = QPDFObjectHandle::newNull();
        assert(array.isArray());
        {
            // Exercise iterators directly
            QPDFArrayItems ai(array);
            auto i = ai.begin();
            assert(i->getName() == "/Item0");
            auto& i_value = *i;
            --i;
            assert(i->getName() == "/Item0");
            ++i;
            ++i;
            ++i;
            assert(i == ai.end());
            ++i;
            assert(i == ai.end());
            assert(! i_value.isInitialized());
            --i;
            assert(i_value.getName() == "/Item2");
            assert(i->getName() == "/Item2");
        }
        assert(dictionary.isDictionary());
        {
            // Exercise iterators directly
            QPDFDictItems di(dictionary);
            auto i = di.begin();
            assert(i->first == "/Key1");
            auto& i_value = *i;
            assert(i->second.getName() == "/Value1");
            ++i;
            ++i;
            assert(i == di.end());
            assert(! i_value.second.isInitialized());
        }
        assert("" == qtest.getStringValue());
        array.getArrayItem(-1).assertNull();
        array.getArrayItem(16059).assertNull();
        integer.getArrayItem(0).assertNull();
        integer.appendItem(null);
        array.eraseItem(-1);
        array.eraseItem(16059);
        integer.eraseItem(0);
        integer.insertItem(0, null);
        integer.setArrayFromVector(std::vector<QPDFObjectHandle>());
        integer.setArrayItem(0, null);
        assert(0 == integer.getArrayNItems());
        assert(integer.getArrayAsVector().empty());
        assert(false == integer.getBoolValue());
        assert(integer.getDictAsMap().empty());
        assert(integer.getKeys().empty());
        assert(false == integer.hasKey("/Potato"));
        integer.removeKey("/Potato");
        integer.replaceOrRemoveKey("/Potato", null);
        integer.replaceOrRemoveKey("/Potato", QPDFObjectHandle::newInteger(1));
        integer.replaceKey("/Potato", QPDFObjectHandle::newInteger(1));
        qtest.getKey("/Integer").getKey("/Potato");
        assert(integer.getInlineImageValue().empty());
        assert(0 == dictionary.getIntValue());
        assert("/QPDFFakeName" == integer.getName());
        assert("QPDFFAKE" == integer.getOperatorValue());
        assert("0.0" == dictionary.getRealValue());
        assert(integer.getStringValue().empty());
        assert(integer.getUTF8Value().empty());
        assert(0.0 == dictionary.getNumericValue());
        // Make sure error messages are okay for nested values
        std::cerr << "One error\n";
        assert(array.getArrayItem(0).getStringValue().empty());
        std::cerr << "One error\n";
        assert(dictionary.getKey("/Quack").getStringValue().empty());
        assert(array.getArrayItem(1).isDictionary());
        assert(array.getArrayItem(1).getKey("/K").isArray());
        assert(array.getArrayItem(1).getKey("/K").getArrayItem(0).isName());
        assert("/V" ==
               array.getArrayItem(1).getKey("/K").getArrayItem(0).getName());
        std::cerr << "Two errors\n";
        assert(array.getArrayItem(16059).getStringValue().empty());
        std::cerr << "One error\n";
        array.getArrayItem(1).getKey("/K").getArrayItem(0).getStringValue();
        // Stream dictionary
        QPDFObjectHandle page = pdf.getAllPages().at(0);
        assert("/QPDFFakeName" ==
               page.getKey("/Contents").getDict().getKey("/Potato").getName());
        // Rectangles
        QPDFObjectHandle::Rectangle r0 = integer.getArrayAsRectangle();
        assert((r0.llx == 0) && (r0.lly == 0) &&
               (r0.urx == 0) && (r0.ury == 0));
        QPDFObjectHandle rect = QPDFObjectHandle::newFromRectangle(
            QPDFObjectHandle::Rectangle(1.2, 3.4, 5.6, 7.8));
        QPDFObjectHandle::Rectangle r1 = rect.getArrayAsRectangle();
        assert((r1.llx > 1.19) && (r1.llx < 1.21) &&
               (r1.lly > 3.39) && (r1.lly < 3.41) &&
               (r1.urx > 5.59) && (r1.urx < 5.61) &&
               (r1.ury > 7.79) && (r1.ury < 7.81));
        QPDFObjectHandle uninitialized;
        assert(! uninitialized.isInitialized());
        assert(! uninitialized.isInteger());
        assert(! uninitialized.isDictionary());
    }
    else if (n == 43)
    {
        // Forms
        QPDFAcroFormDocumentHelper afdh(pdf);
        if (! afdh.hasAcroForm())
        {
            std::cout << "no forms\n";
            return;
        }
        std::cout << "iterating over form fields\n";
        std::vector<QPDFFormFieldObjectHelper> form_fields =
            afdh.getFormFields();
        for (std::vector<QPDFFormFieldObjectHelper>::iterator iter =
                 form_fields.begin();
             iter != form_fields.end(); ++iter)
        {
            QPDFFormFieldObjectHelper ffh(*iter);
            std::cout << "Field: " << ffh.getObjectHandle().unparse()
                      << std::endl;
            QPDFFormFieldObjectHelper node = ffh;
            while (! node.isNull())
            {
                QPDFFormFieldObjectHelper parent(node.getParent());
                std::cout << "  Parent: "
                          << (parent.isNull()
                              ? std::string("none")
                              : parent.getObjectHandle().unparse())
                          << std::endl;
                node = parent;
            }
            std::cout << "  Fully qualified name: "
                      << ffh.getFullyQualifiedName() << std::endl;
            std::cout << "  Partial name: "
                      << ffh.getPartialName() << std::endl;
            std::cout << "  Alternative name: "
                      << ffh.getAlternativeName() << std::endl;
            std::cout << "  Mapping name: "
                      << ffh.getMappingName() << std::endl;
            std::cout << "  Field type: "
                      << ffh.getFieldType() << std::endl;
            std::cout << "  Value: "
                      << ffh.getValue().unparse() << std::endl;
            std::cout << "  Value as string: "
                      << ffh.getValueAsString() << std::endl;
            std::cout << "  Default value: "
                      << ffh.getDefaultValue().unparse() << std::endl;
            std::cout << "  Default value as string: "
                      << ffh.getDefaultValueAsString() << std::endl;
            std::cout << "  Default appearance: "
                      << ffh.getDefaultAppearance() << std::endl;
            std::cout << "  Quadding: "
                      << ffh.getQuadding() << std::endl;
            std::vector<QPDFAnnotationObjectHelper> annotations =
                afdh.getAnnotationsForField(ffh);
            for (std::vector<QPDFAnnotationObjectHelper>::iterator i2 =
                     annotations.begin();
                 i2 != annotations.end(); ++i2)
            {
                std::cout << "  Annotation: "
                          << (*i2).getObjectHandle().unparse() << std::endl;
            }
        }
        std::cout << "iterating over annotations per page\n";
        std::vector<QPDFPageObjectHelper> pages =
            QPDFPageDocumentHelper(pdf).getAllPages();
        for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
             iter != pages.end(); ++iter)
        {
            std::cout << "Page: " << (*iter).getObjectHandle().unparse()
                      << std::endl;
            std::vector<QPDFAnnotationObjectHelper> annotations =
                afdh.getWidgetAnnotationsForPage(*iter);
            for (std::vector<QPDFAnnotationObjectHelper>::iterator i2 =
                     annotations.begin();
                 i2 != annotations.end(); ++i2)
            {
                QPDFAnnotationObjectHelper ah(*i2);
                std::cout << "  Annotation: " << ah.getObjectHandle().unparse()
                          << std::endl;
                std::cout << "    Field: "
                          << (afdh.getFieldForAnnotation(ah).
                              getObjectHandle().unparse())
                          << std::endl;
                std::cout << "    Subtype: " << ah.getSubtype() << std::endl;
                std::cout << "    Rect: ";
                print_rect(std::cout, ah.getRect());
                std::cout << std::endl;
                std::string state = ah.getAppearanceState();
                if (! state.empty())
                {
                    std::cout << "    Appearance state: " << state
                              << std::endl;
                }
                std::cout << "    Appearance stream (/N): "
                          << ah.getAppearanceStream("/N").unparse()
                          << std::endl;
                std::cout << "    Appearance stream (/N, /3): "
                          << ah.getAppearanceStream("/N", "/3").unparse()
                          << std::endl;
            }
        }
    }
    else if (n == 44)
    {
        // Set form fields.
        QPDFAcroFormDocumentHelper afdh(pdf);
        std::vector<QPDFFormFieldObjectHelper> fields = afdh.getFormFields();
        for (std::vector<QPDFFormFieldObjectHelper>::iterator iter =
                 fields.begin();
             iter != fields.end(); ++iter)
        {
            QPDFFormFieldObjectHelper& field(*iter);
            QPDFObjectHandle ft = field.getInheritableFieldValue("/FT");
            if (ft.isName() && (ft.getName() == "/Tx"))
            {
                // \xc3\xb7 is utf-8 for U+00F7 (divided by)
                field.setV("3.14 \xc3\xb7 0");
                std::cout << "Set field value: "
                          << field.getFullyQualifiedName()
                          << " -> "
                          << field.getValueAsString()
                          << std::endl;
            }
        }
        QPDFWriter w(pdf, "a.pdf");
	w.setQDFMode(true);
        w.setStaticID(true);
        w.setSuppressOriginalObjectIDs(true);
        w.write();
    }
    else if (n == 45)
    {
        // Decode obfuscated files. This is here to help test with
        // files that trigger anti-virus warnings. See comments in
        // qpdf.test for details.
        QPDFWriter w(pdf, "a.pdf");
        w.setStaticID(true);
        w.write();
        if (! pdf.getWarnings().empty())
        {
            exit(3);
        }
    }
    else if (n == 46)
    {
        // Test number tree. This test is crafted to work with
        // number-tree.pdf
        QPDFObjectHandle qtest = pdf.getTrailer().getKey("/QTest");
        QPDFNumberTreeObjectHelper ntoh(qtest, pdf);
        for (auto& iter: ntoh)
        {
            std::cout << iter.first << " "
                      << iter.second.getStringValue()
                      << std::endl;
        }
        QPDFNumberTreeObjectHelper::idx_map ntoh_map = ntoh.getAsMap();
        for (auto& iter: ntoh_map)
        {
            std::cout << iter.first << " "
                      << iter.second.getStringValue()
                      << std::endl;
        }
        assert(1 == ntoh.getMin());
        assert(29 == ntoh.getMax());
        assert(ntoh.hasIndex(6));
        assert(! ntoh.hasIndex(500));
        QPDFObjectHandle oh;
        assert(! ntoh.findObject(4, oh));
        assert(ntoh.findObject(3, oh));
        assert("three" == oh.getStringValue());
        QPDFNumberTreeObjectHelper::numtree_number offset = 0;
        assert(! ntoh.findObjectAtOrBelow(0, oh, offset));
        assert(ntoh.findObjectAtOrBelow(8, oh, offset));
        assert("six" == oh.getStringValue());
        assert(2 == offset);

        auto new1 = QPDFNumberTreeObjectHelper::newEmpty(pdf);
        auto iter1 = new1.begin();
        assert(iter1 == new1.end());
        ++iter1;
        assert(iter1 == new1.end());
        --iter1;
        assert(iter1 == new1.end());
        new1.insert(1, QPDFObjectHandle::newString("1"));
        ++iter1;
        assert((*iter1).first == 1); // exercise operator* explicitly
        auto& iter1_val = *iter1;
        --iter1;
        assert(iter1 == new1.end());
        --iter1;
        assert(iter1->first == 1);
        assert(iter1_val.first == 1);
        new1.insert(2, QPDFObjectHandle::newString("2"));
        ++iter1;
        assert(iter1->first == 2);
        assert(iter1_val.first == 2);
        ++iter1;
        assert(iter1 == new1.end());
        assert(! iter1_val.second.isInitialized());
        ++iter1;
        assert(iter1->first == 1);
        --iter1;
        assert(iter1 == new1.end());
        --iter1;
        assert(iter1->first == 2);

        std::cout << "insertAfter" << std::endl;
        auto new2 = QPDFNumberTreeObjectHelper::newEmpty(pdf);
        auto iter2 = new2.begin();
        assert(iter2 == new2.end());
        iter2.insertAfter(3, QPDFObjectHandle::newString("3!"));
        assert(iter2->first == 3);
        iter2.insertAfter(4, QPDFObjectHandle::newString("4!"));
        assert(iter2->first == 4);
        for (auto& i: new2)
        {
            std::cout << i.first << " " << i.second.unparse() << std::endl;
        }

        // Exercise deprecated API until qpdf 11
        std::cout << "/Bad1: deprecated API" << std::endl;
        auto bad1 = QPDFNumberTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad1"));
        assert(bad1.begin() == bad1.end());

        std::cout << "/Bad1" << std::endl;
        bad1 = QPDFNumberTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad1"), pdf);
        assert(bad1.begin() == bad1.end());
        assert(bad1.last() == bad1.end());

        std::cout << "/Bad2" << std::endl;
        auto bad2 = QPDFNumberTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad2"), pdf);
        for (auto& i: bad2)
        {
            std::cout << i.first << " " << i.second.unparse() << std::endl;
        }

        std::vector<std::string> empties = {"/Empty1", "/Empty2"};
        for (auto const& k: empties)
        {
            std::cout << k << std::endl;
            auto empty = QPDFNumberTreeObjectHelper(
                pdf.getTrailer().getKey(k), pdf);
            assert(empty.begin() == empty.end());
            assert(empty.last() == empty.end());
            auto i = empty.insert(5, QPDFObjectHandle::newString("5"));
            assert(i->first == 5);
            assert(i->second.getStringValue() == "5");
            assert(empty.begin()->first == 5);
            assert(empty.last()->first == 5);
            assert(empty.begin()->second.getStringValue() == "5");
            i = empty.insert(5, QPDFObjectHandle::newString("5+"));
            assert(i->first == 5);
            assert(i->second.getStringValue() == "5+");
            assert(empty.begin()->second.getStringValue() == "5+");
            i = empty.insert(6, QPDFObjectHandle::newString("6"));
            assert(i->first == 6);
            assert(i->second.getStringValue() == "6");
            assert(empty.begin()->second.getStringValue() == "5+");
            assert(empty.last()->first == 6);
            assert(empty.last()->second.getStringValue() == "6");
        }
        std::cout << "Insert into invalid" << std::endl;
        auto invalid1 = QPDFNumberTreeObjectHelper(
            QPDFObjectHandle::newDictionary(), pdf);
        try
        {
            invalid1.insert(1, QPDFObjectHandle::newNull());
        }
        catch (QPDFExc& e)
        {
            std::cout << e.what() << std::endl;
        }

        std::cout << "/Bad3, no repair" << std::endl;
        auto bad3_oh = pdf.getTrailer().getKey("/Bad3");
        auto bad3 = QPDFNumberTreeObjectHelper(bad3_oh, pdf, false);
        for (auto& i: bad3)
        {
            std::cout << i.first << " " << i.second.unparse() << std::endl;
        }
        assert(! bad3_oh.getKey("/Kids").getArrayItem(0).isIndirect());

        std::cout << "/Bad3, repair" << std::endl;
        bad3 = QPDFNumberTreeObjectHelper(bad3_oh, pdf, true);
        for (auto& i: bad3)
        {
            std::cout << i.first << " " << i.second.unparse() << std::endl;
        }
        assert(bad3_oh.getKey("/Kids").getArrayItem(0).isIndirect());

        std::cout << "/Bad4 -- missing limits" << std::endl;
        auto bad4 = QPDFNumberTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad4"), pdf);
        bad4.insert(5, QPDFObjectHandle::newString("5"));
        for (auto& i: bad4)
        {
            std::cout << i.first << " " << i.second.unparse() << std::endl;
        }

        std::cout << "/Bad5 -- limit errors" << std::endl;
        auto bad5 = QPDFNumberTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad5"), pdf);
        assert(bad5.find(10) == bad5.end());
    }
    else if (n == 47)
    {
        // Test page labels.
        QPDFPageLabelDocumentHelper pldh(pdf);
        long long npages = pdf.getRoot().getKey("/Pages").
            getKey("/Count").getIntValue();
        std::vector<QPDFObjectHandle> labels;
        pldh.getLabelsForPageRange(0, npages - 1, 1, labels);
        assert(labels.size() % 2 == 0);
        for (size_t i = 0; i < labels.size(); i+= 2)
        {
            std::cout << labels.at(i).getIntValue() << " "
                      << labels.at(i+1).unparse() << std::endl;
        }
    }
    else if (n == 48)
    {
        // Test name tree. This test is crafted to work with
        // name-tree.pdf
        QPDFObjectHandle qtest = pdf.getTrailer().getKey("/QTest");
        QPDFNameTreeObjectHelper ntoh(qtest, pdf);
        for (auto& iter: ntoh)
        {
            std::cout << iter.first << " -> "
                      << iter.second.getStringValue()
                      << std::endl;
        }
        std::map<std::string, QPDFObjectHandle> ntoh_map = ntoh.getAsMap();
        for (auto& iter: ntoh_map)
        {
            std::cout << iter.first << " -> "
                      << iter.second.getStringValue()
                      << std::endl;
        }
        assert(ntoh.hasName("11 elephant"));
        assert(ntoh.hasName("07 sev\xe2\x80\xa2n"));
        assert(! ntoh.hasName("potato"));
        QPDFObjectHandle oh;
        assert(! ntoh.findObject("potato", oh));
        assert(ntoh.findObject("07 sev\xe2\x80\xa2n", oh));
        assert("seven!" == oh.getStringValue());
        auto last = ntoh.last();
        assert(last->first == "29 twenty-nine");
        assert(last->second.getUTF8Value() == "twenty-nine!");

        auto new1 = QPDFNameTreeObjectHelper::newEmpty(pdf);
        auto iter1 = new1.begin();
        assert(iter1 == new1.end());
        ++iter1;
        assert(iter1 == new1.end());
        --iter1;
        assert(iter1 == new1.end());
        new1.insert("1", QPDFObjectHandle::newString("1"));
        ++iter1;
        assert(iter1->first == "1");
        auto& iter1_val = *iter1;
        --iter1;
        assert(iter1 == new1.end());
        --iter1;
        assert(iter1->first == "1");
        assert(iter1_val.first == "1");
        new1.insert("2", QPDFObjectHandle::newString("2"));
        ++iter1;
        assert(iter1->first == "2");
        assert(iter1_val.first == "2");
        ++iter1;
        assert(iter1 == new1.end());
        assert(! iter1_val.second.isInitialized());
        ++iter1;
        assert(iter1->first == "1");
        --iter1;
        assert(iter1 == new1.end());
        --iter1;
        assert(iter1->first == "2");

        std::cout << "insertAfter" << std::endl;
        auto new2 = QPDFNameTreeObjectHelper::newEmpty(pdf);
        auto iter2 = new2.begin();
        assert(iter2 == new2.end());
        iter2.insertAfter("3", QPDFObjectHandle::newString("3!"));
        assert(iter2->first == "3");
        iter2.insertAfter("4", QPDFObjectHandle::newString("4!"));
        assert(iter2->first == "4");
        for (auto& i: new2)
        {
            std::cout << i.first << " " << i.second.unparse() << std::endl;
        }

        std::vector<std::string> empties = {"/Empty1", "/Empty2"};
        for (auto const& k: empties)
        {
            std::cout << k << std::endl;
            auto empty = QPDFNameTreeObjectHelper(
                pdf.getTrailer().getKey(k), pdf);
            assert(empty.begin() == empty.end());
            assert(empty.last() == empty.end());
            auto i = empty.insert("five", QPDFObjectHandle::newString("5"));
            assert(i->first == "five");
            assert(i->second.getStringValue() == "5");
            assert(empty.begin()->first == "five");
            assert(empty.last()->first == "five");
            assert(empty.begin()->second.getStringValue() == "5");
            i = empty.insert("five", QPDFObjectHandle::newString("5+"));
            assert(i->first == "five");
            assert(i->second.getStringValue() == "5+");
            assert(empty.begin()->second.getStringValue() == "5+");
            i = empty.insert("six", QPDFObjectHandle::newString("6"));
            assert(i->first == "six");
            assert(i->second.getStringValue() == "6");
            assert(empty.begin()->second.getStringValue() == "5+");
            assert(empty.last()->first == "six");
            assert(empty.last()->second.getStringValue() == "6");
        }

        // Exercise deprecated API until qpdf 11
        std::cout << "/Bad1: deprecated API" << std::endl;
        auto bad1 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad1"));
        try
        {
            bad1.find("G", true);
            assert(false);
        }
        catch (std::runtime_error& e)
        {
            std::cout << e.what() << std::endl;
        }

        std::cout << "/Bad1 -- wrong key type" << std::endl;
        bad1 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad1"), pdf);
        assert(bad1.find("G", true)->first == "A");
        for (auto const& i: bad1)
        {
            std::cout << i.first << std::endl;
        }

        std::cout << "/Bad2 -- invalid kid" << std::endl;
        auto bad2 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad2"), pdf);
        assert(bad2.find("G", true)->first == "B");
        for (auto const& i: bad2)
        {
            std::cout << i.first << std::endl;
        }

        std::cout << "/Bad3 -- invalid kid" << std::endl;
        auto bad3 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad3"), pdf);
        assert(bad3.find("G", true) == bad3.end());

        std::cout << "/Bad4 -- invalid kid" << std::endl;
        auto bad4 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad4"), pdf);
        assert(bad4.find("F", true)->first == "C");
        for (auto const& i: bad4)
        {
            std::cout << i.first << std::endl;
        }

        std::cout << "/Bad5 -- loop in find" << std::endl;
        auto bad5 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad5"), pdf);
        assert(bad5.find("F", true)->first == "D");

        std::cout << "/Bad6 -- bad limits" << std::endl;
        auto bad6 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Bad6"), pdf);
        assert(bad6.insert("H", QPDFObjectHandle::newNull())->first == "H");
    }
    else if (n == 49)
    {
        // Outlines
        std::vector<QPDFPageObjectHelper> pages =
            QPDFPageDocumentHelper(pdf).getAllPages();
        QPDFOutlineDocumentHelper odh(pdf);
        int pageno = 0;
        for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
             iter != pages.end(); ++iter, ++pageno)
        {
            std::vector<QPDFOutlineObjectHelper> outlines =
                odh.getOutlinesForPage((*iter).getObjectHandle().getObjGen());
            for (std::vector<QPDFOutlineObjectHelper>::iterator oiter =
                     outlines.begin();
                 oiter != outlines.end(); ++oiter)
            {
                std::cout
                    << "page " << pageno << ": "
                    << (*oiter).getTitle() << " -> "
                    << (*oiter).getDest().unparseResolved() << std::endl;
            }
        }
    }
    else if (n == 50)
    {
        // Test dictionary merge. This test is crafted to work with
        // merge-dict.pdf
        QPDFObjectHandle d1 = pdf.getTrailer().getKey("/Dict1");
        QPDFObjectHandle d2 = pdf.getTrailer().getKey("/Dict2");
        d1.mergeResources(d2);
        std::cout << d1.getJSON().unparse() << std::endl;
        // Top-level type mismatch
        d1.mergeResources(d2.getKey("/k1"));
        std::set<std::string> names = d1.getResourceNames();
        for (std::set<std::string>::iterator iter = names.begin();
             iter != names.end(); ++iter)
        {
            std::cout << *iter << std::endl;
        }
    }
    else if (n == 51)
    {
        // Test radio button and checkbox field setting. The input
        // files must have radios button called r1 and r2 and
        // checkboxes called checkbox1 and checkbox2. The files
        // button-set*.pdf are designed for this test case.
        QPDFObjectHandle acroform = pdf.getRoot().getKey("/AcroForm");
        QPDFObjectHandle fields = acroform.getKey("/Fields");
        int nitems = fields.getArrayNItems();
        for (int i = 0; i < nitems; ++i)
        {
            QPDFObjectHandle field = fields.getArrayItem(i);
            QPDFObjectHandle T = field.getKey("/T");
            if (! T.isString())
            {
                continue;
            }
            std::string Tval = T.getUTF8Value();
            if (Tval == "r1")
            {
                std::cout << "setting r1 via parent\n";
                QPDFFormFieldObjectHelper foh(field);
                foh.setV(QPDFObjectHandle::newName("/2"));
            }
            else if (Tval == "r2")
            {
                std::cout << "setting r2 via child\n";
                field = field.getKey("/Kids").getArrayItem(1);
                QPDFFormFieldObjectHelper foh(field);
                foh.setV(QPDFObjectHandle::newName("/3"));
            }
            else if (Tval == "checkbox1")
            {
                std::cout << "turning checkbox1 on\n";
                QPDFFormFieldObjectHelper foh(field);
                foh.setV(QPDFObjectHandle::newName("/Yes"));
            }
            else if (Tval == "checkbox2")
            {
                std::cout << "turning checkbox2 off\n";
                QPDFFormFieldObjectHelper foh(field);
                foh.setV(QPDFObjectHandle::newName("/Off"));
            }
        }
        QPDFWriter w(pdf, "a.pdf");
	w.setQDFMode(true);
        w.setStaticID(true);
        w.write();
    }
    else if (n == 52)
    {
        // This test just sets a field value for appearance stream
        // generating testing.
        QPDFObjectHandle acroform = pdf.getRoot().getKey("/AcroForm");
        QPDFObjectHandle fields = acroform.getKey("/Fields");
        int nitems = fields.getArrayNItems();
        for (int i = 0; i < nitems; ++i)
        {
            QPDFObjectHandle field = fields.getArrayItem(i);
            QPDFObjectHandle T = field.getKey("/T");
            if (! T.isString())
            {
                continue;
            }
            std::string Tval = T.getUTF8Value();
            if (Tval == "list1")
            {
                std::cout << "setting list1 value\n";
                QPDFFormFieldObjectHelper foh(field);
                foh.setV(QPDFObjectHandle::newString(arg2));
            }
        }
        QPDFWriter w(pdf, "a.pdf");
        w.write();
    }
    else if (n == 53)
    {
        // Test get all objects and dangling ref handling
        QPDFObjectHandle root = pdf.getRoot();
        root.replaceKey(
            "/Q1",
            pdf.makeIndirectObject(QPDFObjectHandle::newString("potato")));
        std::cout << "all objects" << std::endl;
        std::vector<QPDFObjectHandle> all = pdf.getAllObjects();
        for (std::vector<QPDFObjectHandle>::iterator iter = all.begin();
             iter != all.end(); ++iter)
        {
            std::cout << (*iter).unparse() << std::endl;
        }

        QPDFWriter w(pdf, "a.pdf");
        w.setStaticID(true);
        w.write();
    }
    else if (n == 54)
    {
        // Test getFinalVersion. This must be invoked with a file
        // whose final version is not 1.5.
        QPDFWriter w(pdf, "a.pdf");
        assert(pdf.getPDFVersion() != "1.5");
        w.setObjectStreamMode(qpdf_o_generate);
        if (w.getFinalVersion() != "1.5")
        {
            std::cout << "oops: " << w.getFinalVersion() << std::endl;
        }
    }
    else if (n == 55)
    {
        // Form XObjects
        std::vector<QPDFPageObjectHelper> pages =
            QPDFPageDocumentHelper(pdf).getAllPages();
        QPDFObjectHandle qtest = QPDFObjectHandle::newArray();
        for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
             iter != pages.end(); ++iter)
        {
            QPDFPageObjectHelper& ph(*iter);
            qtest.appendItem(ph.getFormXObjectForPage());
            qtest.appendItem(ph.getFormXObjectForPage(false));
        }
        pdf.getTrailer().replaceKey("/QTest", qtest);
        QPDFWriter w(pdf, "a.pdf");
	w.setQDFMode(true);
        w.setStaticID(true);
        w.write();
    }
    else if ((n >= 56) && (n <= 59))
    {
        // Placing form XObjects
        assert(arg2);
        QPDF pdf2;
        pdf2.processFile(arg2);

        // red pages are from pdf, blue pages are from pdf2
        // red pages always have stated rotation absolutely
        // 56: blue pages are overlaid exactly on top of red pages
        // 57: blue pages have stated rotation relative to red pages
        // 58: blue pages have no rotation (absolutely upright)
        // 59: blue pages have stated rotation absolutely
        bool handle_from_transformation = ((n == 57) || (n == 59));
        bool invert_to_transformation = ((n == 58) || (n == 59));

        std::vector<QPDFPageObjectHelper> pages1 =
            QPDFPageDocumentHelper(pdf).getAllPages();
        std::vector<QPDFPageObjectHelper> pages2 =
            QPDFPageDocumentHelper(pdf2).getAllPages();
        size_t npages = (pages1.size() < pages2.size()
                         ? pages1.size() : pages2.size());
        for (size_t i = 0; i < npages; ++i)
        {
            QPDFPageObjectHelper& ph1 = pages1.at(i);
            QPDFPageObjectHelper& ph2 = pages2.at(i);
            QPDFObjectHandle fo = pdf.copyForeignObject(
                ph2.getFormXObjectForPage(handle_from_transformation));
            int min_suffix = 1;
            QPDFObjectHandle resources = ph1.getAttribute("/Resources", true);
            std::string name = resources.getUniqueResourceName(
                "/Fx", min_suffix);
            std::string content =
                ph1.placeFormXObject(
                    fo, name, ph1.getTrimBox().getArrayAsRectangle(),
                    invert_to_transformation);
            if (! content.empty())
            {
                resources.mergeResources(
                    QPDFObjectHandle::parse("<< /XObject << >> >>"));
                resources.getKey("/XObject").replaceKey(name, fo);
                ph1.addPageContents(
                    QPDFObjectHandle::newStream(&pdf, "q\n"), true);
                ph1.addPageContents(
                    QPDFObjectHandle::newStream(&pdf, "\nQ\n" + content),
                    false);
            }
        }
        QPDFWriter w(pdf, "a.pdf");
	w.setQDFMode(true);
        w.setStaticID(true);
        w.write();
    }
    else if (n == 60)
    {
        // Boundary condition testing for getUniqueResourceName
        QPDFObjectHandle r1 = QPDFObjectHandle::newDictionary();
        int min_suffix = 1;
        for (int i = 1; i < 3; ++i)
        {
            std::string name = r1.getUniqueResourceName("/Quack", min_suffix);
            r1.mergeResources(QPDFObjectHandle::parse("<< /Z << >> >>"));
            r1.getKey("/Z").replaceKey(
                name, QPDFObjectHandle::newString("moo"));
        }
        pdf.getTrailer().replaceKey("/QTest", r1);
        QPDFWriter w(pdf, "a.pdf");
        w.setStaticID(true);
        w.write();
    }
    else if (n == 61)
    {
        // Test to make sure exceptions can be caught properly across
        // shared library boundaries.
	pdf.setAttemptRecovery(false);
        pdf.setSuppressWarnings(true);
        try
        {
            pdf.processMemoryFile("empty", "", 0);
        }
        catch (QPDFExc const&)
        {
            std::cout << "Caught QPDFExc as expected" << std::endl;
        }
        try
        {
            QUtil::safe_fopen("/does/not/exist", "r");
        }
        catch (QPDFSystemError const&)
        {
            std::cout << "Caught QPDFSystemError as expected" << std::endl;
        }
        try
        {
            QUtil::int_to_string_base(0, 12);
        }
        catch (std::logic_error const&)
        {
            std::cout << "Caught logic_error as expected" << std::endl;
        }
        try
        {
            QUtil::toUTF8(0xffffffff);
        }
        catch (std::runtime_error const&)
        {
            std::cout << "Caught runtime_error as expected" << std::endl;
        }
    }
    else if (n == 62)
    {
        // Test int size checks. This test will fail if int and long
        // long are the same size.
        QPDFObjectHandle t = pdf.getTrailer();
        unsigned long long q1_l = 3ULL * QIntC::to_ulonglong(INT_MAX);
        long long q1 = QIntC::to_longlong(q1_l);
        long long q2_l = 3LL * QIntC::to_longlong(INT_MIN);
        long long q2 = QIntC::to_longlong(q2_l);
        unsigned int q3_i = UINT_MAX;
        long long q3 = QIntC::to_longlong(q3_i);
        t.replaceKey("/Q1", QPDFObjectHandle::newInteger(q1));
        t.replaceKey("/Q2", QPDFObjectHandle::newInteger(q2));
        t.replaceKey("/Q3", QPDFObjectHandle::newInteger(q3));
        assert_compare_numbers(q1, t.getKey("/Q1").getIntValue());
        assert_compare_numbers(q1_l, t.getKey("/Q1").getUIntValue());
        assert_compare_numbers(INT_MAX, t.getKey("/Q1").getIntValueAsInt());
        assert_compare_numbers(UINT_MAX, t.getKey("/Q1").getUIntValueAsUInt());
        assert_compare_numbers(q2_l, t.getKey("/Q2").getIntValue());
        assert_compare_numbers(0U, t.getKey("/Q2").getUIntValue());
        assert_compare_numbers(INT_MIN, t.getKey("/Q2").getIntValueAsInt());
        assert_compare_numbers(0U, t.getKey("/Q2").getUIntValueAsUInt());
        assert_compare_numbers(INT_MAX, t.getKey("/Q3").getIntValueAsInt());
        assert_compare_numbers(UINT_MAX, t.getKey("/Q3").getUIntValueAsUInt());
    }
    else if (n == 63)
    {
        QPDFWriter w(pdf);
        // Exercise setting encryption parameters before setting the
        // output filename. The previous bug does not happen if static
        // or deterministic ID is used because the filename is not
        // used as part of the input data for ID generation in those
        // cases.
        w.setR6EncryptionParameters(
            "u", "o", true, true, true, true, true, true, qpdf_r3p_full, true);
        w.setOutputFilename("a.pdf");
        w.write();
    }
    else if ((n >= 64) && (n <= 67))
    {
        // Placing form XObjects: expand, shrink
        assert(arg2);
        QPDF pdf2;
        pdf2.processFile(arg2);

        // Overlay file2 on file1.
        // 64: allow neither shrink nor shrink
        // 65: allow shrink but not expand
        // 66: allow expand but not shrink
        // 67: allow both shrink and expand
        bool allow_shrink = ((n == 65) || (n == 67));
        bool allow_expand = ((n == 66) || (n == 67));
        std::vector<QPDFPageObjectHelper> pages1 =
            QPDFPageDocumentHelper(pdf).getAllPages();
        std::vector<QPDFPageObjectHelper> pages2 =
            QPDFPageDocumentHelper(pdf2).getAllPages();
        size_t npages = (pages1.size() < pages2.size()
                         ? pages1.size() : pages2.size());
        for (size_t i = 0; i < npages; ++i)
        {
            QPDFPageObjectHelper& ph1 = pages1.at(i);
            QPDFPageObjectHelper& ph2 = pages2.at(i);
            QPDFObjectHandle fo = pdf.copyForeignObject(
                ph2.getFormXObjectForPage());
            int min_suffix = 1;
            QPDFObjectHandle resources = ph1.getAttribute("/Resources", true);
            std::string name = resources.getUniqueResourceName(
                "/Fx", min_suffix);
            std::string content =
                ph1.placeFormXObject(
                    fo, name, ph1.getTrimBox().getArrayAsRectangle(),
                    false, allow_shrink, allow_expand);
            if (! content.empty())
            {
                resources.mergeResources(
                    QPDFObjectHandle::parse("<< /XObject << >> >>"));
                resources.getKey("/XObject").replaceKey(name, fo);
                ph1.addPageContents(
                    QPDFObjectHandle::newStream(&pdf, "q\n"), true);
                ph1.addPageContents(
                    QPDFObjectHandle::newStream(&pdf, "\nQ\n" + content),
                    false);
            }
        }
        QPDFWriter w(pdf, "a.pdf");
	w.setQDFMode(true);
        w.setStaticID(true);
        w.write();
    }
    else if (n == 68)
    {
	QPDFObjectHandle root = pdf.getRoot();
	QPDFObjectHandle qstream = root.getKey("/QStream");
        try
        {
            qstream.getStreamData();
            std::cout << "oops -- didn't throw" << std::endl;
        }
        catch (std::exception& e)
        {
            std::cout << "get unfilterable stream: " << e.what()
                      << std::endl;
        }
	PointerHolder<Buffer> b1 = qstream.getStreamData(qpdf_dl_all);
	if ((b1->getSize() > 10) &&
	    (memcmp(b1->getBuffer(),
                    "wwwwwwwww", 9) == 0))
	{
	    std::cout << "filtered stream data okay" << std::endl;
	}
	PointerHolder<Buffer> b2 = qstream.getRawStreamData();
	if ((b2->getSize() > 10) &&
	    (memcmp(b2->getBuffer(),
                    "\xff\xd8\xff\xe0\x00\x10\x4a\x46\x49\x46", 10) == 0))
	{
	    std::cout << "raw stream data okay" << std::endl;
	}
    }
    else if (n == 69)
    {
        pdf.setImmediateCopyFrom(true);
        auto pages = pdf.getAllPages();
        for (size_t i = 0; i < pages.size(); ++i)
        {
            QPDF out;
            out.emptyPDF();
            out.addPage(pages.at(i), false);
            std::string outname = std::string("auto-") +
                QUtil::uint_to_string(i) + ".pdf";
            QPDFWriter w(out, outname.c_str());
            w.setStaticID(true);
            w.write();
        }
    }
    else if (n == 70)
    {
        auto trailer = pdf.getTrailer();
        trailer.getKey("/S1").setFilterOnWrite(false);
        trailer.getKey("/S2").setFilterOnWrite(false);
        QPDFWriter w(pdf, "a.pdf");
        w.setStaticID(true);
        w.setDecodeLevel(qpdf_dl_specialized);
        w.write();
    }
    else if (n == 71)
    {
        auto show = [](QPDFObjectHandle& obj,
                       QPDFObjectHandle& xobj_dict,
                       std::string const& key) {
            std::cout << xobj_dict.unparse() << " -> "
                      << key << " -> " << obj.unparse() << std::endl;
        };
        auto page = QPDFPageDocumentHelper(pdf).getAllPages().at(0);
        std::cout << "--- recursive, all ---" << std::endl;
        page.forEachXObject(true, show);
        std::cout << "--- non-recursive, all ---" << std::endl;
        page.forEachXObject(false, show);
        std::cout << "--- recursive, images ---" << std::endl;
        page.forEachImage(true, show);
        std::cout << "--- non-recursive, images ---" << std::endl;
        page.forEachImage(false, show);
        std::cout << "--- recursive, form XObjects ---" << std::endl;
        page.forEachFormXObject(true, show);
        std::cout << "--- non-recursive, form XObjects ---" << std::endl;
        page.forEachFormXObject(false, show);
        auto fx1 = QPDFPageObjectHelper(
            page.getObjectHandle()
            .getKey("/Resources")
            .getKey("/XObject")
            .getKey("/Fx1"));
        std::cout << "--- recursive, all, from fx1 ---" << std::endl;
        fx1.forEachXObject(true, show);
        std::cout << "--- non-recursive, all, from fx1 ---" << std::endl;
        fx1.forEachXObject(false, show);
        std::cout << "--- get images, page ---" << std::endl;
        for (auto& i: page.getImages())
        {
            std::cout << i.first << " -> " << i.second.unparse() << std::endl;
        }
        std::cout << "--- get images, fx ---" << std::endl;
        for (auto& i: fx1.getImages())
        {
            std::cout << i.first << " -> " << i.second.unparse() << std::endl;
        }
        std::cout << "--- get form XObjects, page ---" << std::endl;
        for (auto& i: page.getFormXObjects())
        {
            std::cout << i.first << " -> " << i.second.unparse() << std::endl;
        }
        std::cout << "--- get form XObjects, fx ---" << std::endl;
        for (auto& i: fx1.getFormXObjects())
        {
            std::cout << i.first << " -> " << i.second.unparse() << std::endl;
        }
    }
    else if (n == 72)
    {
        // Call some QPDFPageObjectHelper methods on form XObjects.
        auto page = QPDFPageDocumentHelper(pdf).getAllPages().at(0);
        auto fx1 = QPDFPageObjectHelper(
            page.getObjectHandle()
            .getKey("/Resources")
            .getKey("/XObject")
            .getKey("/Fx1"));
        std::cout << "--- parseContents ---" << std::endl;
        ParserCallbacks cb;
        fx1.parseContents(&cb);
        Pl_Buffer b("buffer");
        fx1.addContentTokenFilter(new TokenFilter);
        fx1.pipeContents(&b);
        std::unique_ptr<Buffer> buf(b.getBuffer());
        std::string s(
            reinterpret_cast<char const*>(buf->getBuffer()),
            buf->getSize());
        assert(s.find("/bye") != std::string::npos);
    }
    else if (n == 73)
    {
        pdf.closeInputSource();
        pdf.getRoot().getKey("/Pages").unparseResolved();
    }
    else if (n == 74)
    {
        // This test is crafted to work with split-nntree.pdf
        std::cout << "/Split1" << std::endl;
        auto split1 = QPDFNumberTreeObjectHelper(
            pdf.getTrailer().getKey("/Split1"), pdf);
        split1.setSplitThreshold(4);
        auto check_split1 = [&split1](int k) {
            auto i = split1.insert(k, QPDFObjectHandle::newString(
                                       QUtil::int_to_string(k)));
            assert(i->first == k);
        };
        check_split1(15);
        check_split1(35);
        check_split1(125);
        for (auto const& i: split1)
        {
            std::cout << i.first << std::endl;
        }

        std::cout << "/Split2" << std::endl;
        auto split2 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Split2"), pdf);
        split2.setSplitThreshold(4);
        auto check_split2 = [](QPDFNameTreeObjectHelper& noh,
                               std::string const& k) {
            auto i = noh.insert(k, QPDFObjectHandle::newUnicodeString(k));
            assert(i->first == k);
        };
        check_split2(split2, "C");
        for (auto const& i: split2)
        {
            std::cout << i.first << std::endl;
        }

        std::cout << "/Split3" << std::endl;
        auto split3 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Split3"), pdf);
        split3.setSplitThreshold(4);
        check_split2(split3, "P");
        check_split2(split3, "\xcf\x80");
        for (auto& i: split3)
        {
            std::cout << i.first << " " << i.second.unparse() << std::endl;
        }

        QPDFWriter w(pdf, "a.pdf");
        w.setStaticID(true);
        w.setQDFMode(true);
        w.write();
    }
    else if (n == 75)
    {
        // This test is crafted to work with erase-nntree.pdf
        auto erase1 = QPDFNameTreeObjectHelper(
            pdf.getTrailer().getKey("/Erase1"), pdf);
        QPDFObjectHandle value;
        assert(! erase1.remove("1X"));
        assert(erase1.remove("1C", &value));
        assert(value.getUTF8Value() == "c");
        auto iter1 = erase1.find("1B");
        iter1.remove();
        assert(iter1->first == "1D");
        iter1.remove();
        assert(iter1 == erase1.end());
        --iter1;
        assert(iter1->first == "1A");
        iter1.remove();
        assert(iter1 == erase1.end());

        auto erase2_oh = pdf.getTrailer().getKey("/Erase2");
        auto erase2 = QPDFNumberTreeObjectHelper(erase2_oh, pdf);
        auto iter2 = erase2.find(250);
        iter2.remove();
        assert(iter2 == erase2.end());
        --iter2;
        assert(iter2->first == 240);
        auto k1 = erase2_oh.getKey("/Kids").getArrayItem(1);
        auto l1 = k1.getKey("/Limits");
        assert(l1.getArrayItem(0).getIntValue() == 230);
        assert(l1.getArrayItem(1).getIntValue() == 240);
        iter2 = erase2.find(210);
        iter2.remove();
        assert(iter2->first == 220);
        k1 = erase2_oh.getKey("/Kids").getArrayItem(0);
        l1 = k1.getKey("/Limits");
        assert(l1.getArrayItem(0).getIntValue() == 220);
        assert(l1.getArrayItem(1).getIntValue() == 220);
        k1 = k1.getKey("/Kids");
        assert(k1.getArrayNItems() == 1);

        auto erase3 = QPDFNumberTreeObjectHelper(
            pdf.getTrailer().getKey("/Erase3"), pdf);
        iter2 = erase3.find(320);
        iter2.remove();
        assert(iter2 == erase3.end());
        erase3.remove(310);
        assert(erase3.begin() == erase3.end());

        auto erase4 = QPDFNumberTreeObjectHelper(
            pdf.getTrailer().getKey("/Erase4"), pdf);
        iter2 = erase4.find(420);
        iter2.remove();
        assert(iter2->first == 430);

        QPDFWriter w(pdf, "a.pdf");
        w.setStaticID(true);
        w.setQDFMode(true);
        w.write();
    }
    else
    {
	throw std::runtime_error(std::string("invalid test ") +
				 QUtil::int_to_string(n));
    }

    if (filep)
    {
        fclose(filep);
    }
    std::cout << "test " << n << " done" << std::endl;
}

int main(int argc, char* argv[])
{
    QUtil::setLineBuf(stdout);
    if ((whoami = strrchr(argv[0], '/')) == NULL)
    {
	whoami = argv[0];
    }
    else
    {
	++whoami;
    }
    // For libtool's sake....
    if (strncmp(whoami, "lt-", 3) == 0)
    {
	whoami += 3;
    }

    if ((argc < 3) || (argc > 4))
    {
	usage();
    }

    try
    {
	int n = QUtil::string_to_int(argv[1]);
	char const* filename1 = argv[2];
        char const* arg2 = argv[3];
	runtest(n, filename1, arg2);
    }
    catch (std::exception& e)
    {
	std::cerr << e.what() << std::endl;
	exit(2);
    }

    return 0;
}