WHITESPACE ONLY -- expand tabs in source code

This comment expands all tabs using an 8-character tab-width. You
should ignore this commit when using git blame or use git blame -w.

In the early days, I used to use tabs where possible for indentation,
since emacs did this automatically. In recent years, I have switched
to only using spaces, which means qpdf source code has been a mixture
of spaces and tabs. I have avoided cleaning this up because of not
wanting gratuitous whitespaces change to cloud the output of git
blame, but I changed my mind after discussing with users who view qpdf
source code in editors/IDEs that have other tab widths by default and
in light of the fact that I am planning to start applying automatic
code formatting soon.

35 files changed, 546 insertions, 546 deletions

diff --git a/examples/pdf-attach-file.cc b/examples/pdf-attach-file.cc
index decc742f..5f60bdb5 100644
--- a/examples/pdf-attach-file.cc
+++ b/examples/pdf-attach-file.cc
@@ -150,7 +150,7 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     char const* infilename = 0;
@@ -216,9 +216,9 @@ int main(int argc, char* argv[])
     }
     catch (std::exception &e)
     {
-	std::cerr << whoami << " exception: "
-		  << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << " exception: "
+                  << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-bookmarks.cc b/examples/pdf-bookmarks.cc
index d4501728..e343c541 100644
--- a/examples/pdf-bookmarks.cc
+++ b/examples/pdf-bookmarks.cc
@@ -20,16 +20,16 @@ static std::map<QPDFObjGen, int> page_map;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " [options] file.pdf [password]"
-	      << std::endl
-	      << "Options:" << std::endl
-	      << "  --numbers        give bookmarks outline-style numbers"
-	      << std::endl
-	      << "  --lines          draw lines to show bookmark hierarchy"
-	      << std::endl
-	      << "  --show-open      indicate whether a bookmark is initially open"
-	      << std::endl
-	      << "  --show-targets   show target if possible"
-	      << std::endl;
+              << std::endl
+              << "Options:" << std::endl
+              << "  --numbers        give bookmarks outline-style numbers"
+              << std::endl
+              << "  --lines          draw lines to show bookmark hierarchy"
+              << std::endl
+              << "  --show-open      indicate whether a bookmark is initially open"
+              << std::endl
+              << "  --show-targets   show target if possible"
+              << std::endl;
     exit(2);
 }
 
@@ -37,14 +37,14 @@ void print_lines(std::vector<int>& numbers)
 {
     for (unsigned int i = 0; i < numbers.size() - 1; ++i)
     {
-	if (numbers.at(i))
-	{
-	    std::cout << "| ";
-	}
-	else
-	{
-	    std::cout << "  ";
-	}
+        if (numbers.at(i))
+        {
+            std::cout << "| ";
+        }
+        else
+        {
+            std::cout << "  ";
+        }
     }
 }
 
@@ -54,10 +54,10 @@ void generate_page_map(QPDF& qpdf)
     std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
     int n = 0;
     for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
-	 iter != pages.end(); ++iter)
+         iter != pages.end(); ++iter)
     {
-	QPDFObjectHandle oh = (*iter).getObjectHandle();
-	page_map[oh.getObjGen()] = ++n;
+        QPDFObjectHandle oh = (*iter).getObjectHandle();
+        page_map[oh.getObjGen()] = ++n;
     }
 }
 
@@ -163,50 +163,50 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if ((argc == 2) && (strcmp(argv[1], "--version") == 0))
     {
-	std::cout << whoami << " version 1.5" << std::endl;
-	exit(0);
+        std::cout << whoami << " version 1.5" << std::endl;
+        exit(0);
     }
 
     int arg;
     for (arg = 1; arg < argc; ++arg)
     {
-	if (argv[arg][0] == '-')
-	{
-	    if (strcmp(argv[arg], "--numbers") == 0)
-	    {
-		style = st_numbers;
-	    }
-	    else if (strcmp(argv[arg], "--lines") == 0)
-	    {
-		style = st_lines;
-	    }
-	    else if (strcmp(argv[arg], "--show-open") == 0)
-	    {
-		show_open = true;
-	    }
-	    else if (strcmp(argv[arg], "--show-targets") == 0)
-	    {
-		show_targets = true;
-	    }
-	    else
-	    {
-		usage();
-	    }
-	}
-	else
-	{
-	    break;
-	}
+        if (argv[arg][0] == '-')
+        {
+            if (strcmp(argv[arg], "--numbers") == 0)
+            {
+                style = st_numbers;
+            }
+            else if (strcmp(argv[arg], "--lines") == 0)
+            {
+                style = st_lines;
+            }
+            else if (strcmp(argv[arg], "--show-open") == 0)
+            {
+                show_open = true;
+            }
+            else if (strcmp(argv[arg], "--show-targets") == 0)
+            {
+                show_targets = true;
+            }
+            else
+            {
+                usage();
+            }
+        }
+        else
+        {
+            break;
+        }
     }
 
     if (arg >= argc)
     {
-	usage();
+        usage();
     }
 
     char const* filename = argv[arg++];
@@ -214,38 +214,38 @@ int main(int argc, char* argv[])
 
     if (arg < argc)
     {
-	password = argv[arg++];
+        password = argv[arg++];
     }
     if (arg != argc)
     {
-	usage();
+        usage();
     }
 
     try
     {
-	QPDF qpdf;
-	qpdf.processFile(filename, password);
+        QPDF qpdf;
+        qpdf.processFile(filename, password);
 
         QPDFOutlineDocumentHelper odh(qpdf);
-	if (odh.hasOutlines())
-	{
-	    std::vector<int> numbers;
-	    if (show_targets)
-	    {
-		generate_page_map(qpdf);
-	    }
-	    extract_bookmarks(odh.getTopLevelOutlines(), numbers);
-	}
-	else
-	{
-	    std::cout << filename << " has no bookmarks" << std::endl;
-	}
+        if (odh.hasOutlines())
+        {
+            std::vector<int> numbers;
+            if (show_targets)
+            {
+                generate_page_map(qpdf);
+            }
+            extract_bookmarks(odh.getTopLevelOutlines(), numbers);
+        }
+        else
+        {
+            std::cout << filename << " has no bookmarks" << std::endl;
+        }
     }
     catch (std::exception &e)
     {
-	std::cerr << whoami << " processing file " << filename << ": "
-		  << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << " processing file " << filename << ": "
+                  << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-c-objects.c b/examples/pdf-c-objects.c
index d800b8af..c616997a 100644
--- a/examples/pdf-c-objects.c
+++ b/examples/pdf-c-objects.c
@@ -58,20 +58,20 @@ int main(int argc, char* argv[])
 
     if ((p = strrchr(argv[0], '/')) != NULL)
     {
-	whoami = p + 1;
+        whoami = p + 1;
     }
     else if ((p = strrchr(argv[0], '\\')) != NULL)
     {
-	whoami = p + 1;
+        whoami = p + 1;
     }
     else
     {
-	whoami = argv[0];
+        whoami = argv[0];
     }
 
     if (argc != 4)
     {
-	usage();
+        usage();
     }
 
     infile = argv[1];
@@ -80,34 +80,34 @@ int main(int argc, char* argv[])
 
     if (((qpdf_read(qpdf, infile, password) & QPDF_ERRORS) == 0) &&
         modify_file(qpdf) &&
-	((qpdf_init_write(qpdf, outfile) & QPDF_ERRORS) == 0))
+        ((qpdf_init_write(qpdf, outfile) & QPDF_ERRORS) == 0))
     {
         /* Use static ID for testing only. For production, a
          * non-static ID is used. See also
          * qpdf_set_deterministic_ID. */
-	qpdf_set_static_ID(qpdf, QPDF_TRUE); /* for testing only */
-	qpdf_write(qpdf);
+        qpdf_set_static_ID(qpdf, QPDF_TRUE); /* for testing only */
+        qpdf_write(qpdf);
     }
     while (qpdf_more_warnings(qpdf))
     {
-	warnings = 1;
-	printf("warning: %s\n",
-	       qpdf_get_error_full_text(qpdf, qpdf_next_warning(qpdf)));
+        warnings = 1;
+        printf("warning: %s\n",
+               qpdf_get_error_full_text(qpdf, qpdf_next_warning(qpdf)));
     }
     if (qpdf_has_error(qpdf))
     {
-	errors = 1;
-	printf("error: %s\n",
-	       qpdf_get_error_full_text(qpdf, qpdf_get_error(qpdf)));
+        errors = 1;
+        printf("error: %s\n",
+               qpdf_get_error_full_text(qpdf, qpdf_get_error(qpdf)));
     }
     qpdf_cleanup(&qpdf);
     if (errors)
     {
-	return 2;
+        return 2;
     }
     else if (warnings)
     {
-	return 3;
+        return 3;
     }
 
     return 0;
diff --git a/examples/pdf-count-strings.cc b/examples/pdf-count-strings.cc
index 3b78ac76..600042f7 100644
--- a/examples/pdf-count-strings.cc
+++ b/examples/pdf-count-strings.cc
@@ -20,7 +20,7 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " infile" << std::endl
-	      << "Applies token filters to infile"
+              << "Applies token filters to infile"
               << std::endl;
     exit(2);
 }
@@ -78,19 +78,19 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if (argc != 2)
     {
-	usage();
+        usage();
     }
     char const* infilename = argv[1];
 
     try
     {
-	QPDF pdf;
-	pdf.processFile(infilename);
+        QPDF pdf;
+        pdf.processFile(infilename);
         std::vector<QPDFPageObjectHelper> pages =
             QPDFPageDocumentHelper(pdf).getAllPages();
         int pageno = 0;
@@ -123,8 +123,8 @@ int main(int argc, char* argv[])
     }
     catch (std::exception& e)
     {
-	std::cerr << whoami << ": " << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << ": " << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-create.cc b/examples/pdf-create.cc
index 8d1e8ee6..f0e86a52 100644
--- a/examples/pdf-create.cc
+++ b/examples/pdf-create.cc
@@ -31,7 +31,7 @@ class ImageProvider: public QPDFObjectHandle::StreamDataProvider
                   std::string const& filter);
     virtual ~ImageProvider();
     virtual void provideStreamData(int objid, int generation,
-				   Pipeline* pipeline);
+                                   Pipeline* pipeline);
     size_t getWidth() const;
     size_t getHeight() const;
 
@@ -142,7 +142,7 @@ ImageProvider::provideStreamData(int objid, int generation,
 void usage()
 {
     std::cerr << "Usage: " << whoami << " filename" << std::endl
-	      << "Creates a simple PDF and writes it to filename" << std::endl;
+              << "Creates a simple PDF and writes it to filename" << std::endl;
     exit(2);
 }
 
@@ -424,22 +424,22 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
     if (argc != 2)
     {
-	usage();
+        usage();
     }
     char const* filename = argv[1];
 
     try
     {
-	create_pdf(filename);
+        create_pdf(filename);
     }
     catch (std::exception& e)
     {
-	std::cerr << e.what() << std::endl;
-	exit(2);
+        std::cerr << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-custom-filter.cc b/examples/pdf-custom-filter.cc
index a958a782..ad4189a3 100644
--- a/examples/pdf-custom-filter.cc
+++ b/examples/pdf-custom-filter.cc
@@ -207,7 +207,7 @@ class StreamReplacer: public QPDFObjectHandle::StreamDataProvider
     StreamReplacer(QPDF* pdf);
     virtual ~StreamReplacer() = default;
     virtual void provideStreamData(int objid, int generation,
-				   Pipeline* pipeline) override;
+                                   Pipeline* pipeline) override;
 
     void registerStream(
         QPDFObjectHandle stream,
@@ -473,7 +473,7 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     char const* infilename = 0;
@@ -517,7 +517,7 @@ int main(int argc, char* argv[])
     catch (std::exception &e)
     {
         std::cerr << whoami << ": exception: " << e.what() << std::endl;
-	exit(2);
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-double-page-size.cc b/examples/pdf-double-page-size.cc
index 6c5e5913..c14b3dc5 100644
--- a/examples/pdf-double-page-size.cc
+++ b/examples/pdf-double-page-size.cc
@@ -13,9 +13,9 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " infile.pdf outfile.pdf [in-password]"
-	      << std::endl
-	      << "Double size of all pages in infile.pdf;"
-	      << " write output to outfile.pdf" << std::endl;
+              << std::endl
+              << "Double size of all pages in infile.pdf;"
+              << " write output to outfile.pdf" << std::endl;
     exit(2);
 }
 
@@ -26,18 +26,18 @@ static void doubleBoxSize(QPDFObjectHandle& page, char const* box_name)
     QPDFObjectHandle box = page.getKey(box_name);
     if (box.isNull())
     {
-	return;
+        return;
     }
     if (! (box.isArray() && (box.getArrayNItems() == 4)))
     {
-	throw std::runtime_error(std::string("box ") + box_name +
-				 " is not an array of four elements");
+        throw std::runtime_error(std::string("box ") + box_name +
+                                 " is not an array of four elements");
     }
     std::vector<QPDFObjectHandle> doubled;
     for (int i = 0; i < 4; ++i)
     {
-	doubled.push_back(
-	    QPDFObjectHandle::newReal(
+        doubled.push_back(
+            QPDFObjectHandle::newReal(
                 box.getArrayItem(i).getNumericValue() * 2.0, 2));
     }
     page.replaceKey(box_name, QPDFObjectHandle::newArray(doubled));
@@ -50,7 +50,7 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     // For test suite
@@ -64,7 +64,7 @@ int main(int argc, char* argv[])
 
     if (! ((argc == 3) || (argc == 4)))
     {
-	usage();
+        usage();
     }
 
     char const* infilename = argv[1];
@@ -76,48 +76,48 @@ int main(int argc, char* argv[])
 
     try
     {
-	QPDF qpdf;
-	qpdf.processFile(infilename, password);
+        QPDF qpdf;
+        qpdf.processFile(infilename, password);
 
-	std::vector<QPDFPageObjectHelper> pages =
+        std::vector<QPDFPageObjectHelper> pages =
             QPDFPageDocumentHelper(qpdf).getAllPages();
-	for (std::vector<QPDFPageObjectHelper>::iterator iter =
+        for (std::vector<QPDFPageObjectHelper>::iterator iter =
                  pages.begin();
-	     iter != pages.end(); ++iter)
-	{
+             iter != pages.end(); ++iter)
+        {
             QPDFPageObjectHelper& ph(*iter);
-	    QPDFObjectHandle page = ph.getObjectHandle();
+            QPDFObjectHandle page = ph.getObjectHandle();
 
-	    // Prepend the buffer to the page's contents
-	    ph.addPageContents(
+            // Prepend the buffer to the page's contents
+            ph.addPageContents(
                 QPDFObjectHandle::newStream(&qpdf, content), true);
 
-	    // Double the size of each of the content boxes
-	    doubleBoxSize(page, "/MediaBox");
-	    doubleBoxSize(page, "/CropBox");
-	    doubleBoxSize(page, "/BleedBox");
-	    doubleBoxSize(page, "/TrimBox");
-	    doubleBoxSize(page, "/ArtBox");
-	}
+            // Double the size of each of the content boxes
+            doubleBoxSize(page, "/MediaBox");
+            doubleBoxSize(page, "/CropBox");
+            doubleBoxSize(page, "/BleedBox");
+            doubleBoxSize(page, "/TrimBox");
+            doubleBoxSize(page, "/ArtBox");
+        }
 
-	// Write out a new file
-	QPDFWriter w(qpdf, outfilename);
-	if (static_id)
-	{
-	    // For the test suite, uncompress streams and use static
-	    // IDs.
-	    w.setStaticID(true); // for testing only
-	    w.setStreamDataMode(qpdf_s_uncompress);
-	}
-	w.write();
-	std::cout << whoami << ": new file written to " << outfilename
-		  << std::endl;
+        // Write out a new file
+        QPDFWriter w(qpdf, outfilename);
+        if (static_id)
+        {
+            // For the test suite, uncompress streams and use static
+            // IDs.
+            w.setStaticID(true); // for testing only
+            w.setStreamDataMode(qpdf_s_uncompress);
+        }
+        w.write();
+        std::cout << whoami << ": new file written to " << outfilename
+                  << std::endl;
     }
     catch (std::exception &e)
     {
-	std::cerr << whoami << " processing file " << infilename << ": "
-		  << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << " processing file " << infilename << ": "
+                  << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-filter-tokens.cc b/examples/pdf-filter-tokens.cc
index baf7b3dc..b71857e3 100644
--- a/examples/pdf-filter-tokens.cc
+++ b/examples/pdf-filter-tokens.cc
@@ -23,7 +23,7 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " infile outfile" << std::endl
-	      << "Applies token filters to infile and writes outfile"
+              << "Applies token filters to infile and writes outfile"
               << std::endl;
     exit(2);
 }
@@ -195,20 +195,20 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if (argc != 3)
     {
-	usage();
+        usage();
     }
     char const* infilename = argv[1];
     char const* outfilename = argv[2];
 
     try
     {
-	QPDF pdf;
-	pdf.processFile(infilename);
+        QPDF pdf;
+        pdf.processFile(infilename);
         std::vector<QPDFPageObjectHelper> pages =
             QPDFPageDocumentHelper(pdf).getAllPages();
         for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
@@ -233,8 +233,8 @@ int main(int argc, char* argv[])
     }
     catch (std::exception& e)
     {
-	std::cerr << whoami << ": " << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << ": " << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-invert-images.cc b/examples/pdf-invert-images.cc
index a61d170f..178cde95 100644
--- a/examples/pdf-invert-images.cc
+++ b/examples/pdf-invert-images.cc
@@ -14,9 +14,9 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " infile.pdf outfile.pdf [in-password]"
-	      << std::endl
-	      << "Invert some images in infile.pdf;"
-	      << " write output to outfile.pdf" << std::endl;
+              << std::endl
+              << "Invert some images in infile.pdf;"
+              << " write output to outfile.pdf" << std::endl;
     exit(2);
 }
 
@@ -36,7 +36,7 @@ class ImageInverter: public QPDFObjectHandle::StreamDataProvider
     {
     }
     virtual void provideStreamData(int objid, int generation,
-				   Pipeline* pipeline) override;
+                                   Pipeline* pipeline) override;
 
     void registerImage(
         QPDFObjectHandle image,
@@ -80,13 +80,13 @@ ImageInverter::registerImage(
     // with it explicitly here. We could explicitly use /DCTDecode and
     // write through a DCT filter if we wanted.
     image.replaceStreamData(self,
-			    QPDFObjectHandle::newNull(),
-			    QPDFObjectHandle::newNull());
+                            QPDFObjectHandle::newNull(),
+                            QPDFObjectHandle::newNull());
 }
 
 void
 ImageInverter::provideStreamData(int objid, int generation,
-				 Pipeline* pipeline)
+                                 Pipeline* pipeline)
 {
     // Use the object and generation number supplied to look up the
     // image data.  Then invert the image data and write the inverted
@@ -99,8 +99,8 @@ ImageInverter::provideStreamData(int objid, int generation,
     unsigned char ch;
     for (size_t i = 0; i < size; ++i)
     {
-	ch = QIntC::to_uchar(0xff - buf[i]);
-	pipeline->write(&ch, 1);
+        ch = QIntC::to_uchar(0xff - buf[i]);
+        pipeline->write(&ch, 1);
     }
     pipeline->finish();
 }
@@ -112,7 +112,7 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     // For test suite
@@ -126,7 +126,7 @@ int main(int argc, char* argv[])
 
     if (! ((argc == 3) || (argc == 4)))
     {
-	usage();
+        usage();
     }
 
     char const* infilename = argv[1];
@@ -135,64 +135,64 @@ int main(int argc, char* argv[])
 
     try
     {
-	QPDF qpdf;
-	qpdf.processFile(infilename, password);
+        QPDF qpdf;
+        qpdf.processFile(infilename, password);
 
-	ImageInverter* inv = new ImageInverter;
-	auto p = PointerHolder<QPDFObjectHandle::StreamDataProvider>(inv);
+        ImageInverter* inv = new ImageInverter;
+        auto p = PointerHolder<QPDFObjectHandle::StreamDataProvider>(inv);
 
-	// For each page...
-	std::vector<QPDFPageObjectHelper> pages =
+        // For each page...
+        std::vector<QPDFPageObjectHelper> pages =
             QPDFPageDocumentHelper(qpdf).getAllPages();
-	for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
-	     iter != pages.end(); ++iter)
-	{
-	    QPDFPageObjectHelper& page(*iter);
-	    // Get all images on the page.
-	    std::map<std::string, QPDFObjectHandle> images =
-		page.getImages();
-	    for (auto& iter2: images)
-	    {
-		QPDFObjectHandle& image = iter2.second;
-		QPDFObjectHandle image_dict = image.getDict();
-		QPDFObjectHandle color_space =
-		    image_dict.getKey("/ColorSpace");
-		QPDFObjectHandle bits_per_component =
-		    image_dict.getKey("/BitsPerComponent");
-
-		// For our example, we can only work with images 8-bit
-		// grayscale images that we can fully decode.  Use
-		// pipeStreamData with a null pipeline to determine
-		// whether the image is filterable.  Directly inspect
-		// keys to determine the image type.
-		if (image.pipeStreamData(0, qpdf_ef_compress,
+        for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
+             iter != pages.end(); ++iter)
+        {
+            QPDFPageObjectHelper& page(*iter);
+            // Get all images on the page.
+            std::map<std::string, QPDFObjectHandle> images =
+                page.getImages();
+            for (auto& iter2: images)
+            {
+                QPDFObjectHandle& image = iter2.second;
+                QPDFObjectHandle image_dict = image.getDict();
+                QPDFObjectHandle color_space =
+                    image_dict.getKey("/ColorSpace");
+                QPDFObjectHandle bits_per_component =
+                    image_dict.getKey("/BitsPerComponent");
+
+                // For our example, we can only work with images 8-bit
+                // grayscale images that we can fully decode.  Use
+                // pipeStreamData with a null pipeline to determine
+                // whether the image is filterable.  Directly inspect
+                // keys to determine the image type.
+                if (image.pipeStreamData(0, qpdf_ef_compress,
                                          qpdf_dl_all) &&
                     color_space.isNameAndEquals("/DeviceGray") &&
-		    bits_per_component.isInteger() &&
-		    (bits_per_component.getIntValue() == 8))
-		{
+                    bits_per_component.isInteger() &&
+                    (bits_per_component.getIntValue() == 8))
+                {
                     inv->registerImage(image, p);
                 }
-	    }
-	}
-
-	// Write out a new file
-	QPDFWriter w(qpdf, outfilename);
-	if (static_id)
-	{
-	    // For the test suite, uncompress streams and use static
-	    // IDs.
-	    w.setStaticID(true); // for testing only
-	}
-	w.write();
-	std::cout << whoami << ": new file written to " << outfilename
-		  << std::endl;
+            }
+        }
+
+        // Write out a new file
+        QPDFWriter w(qpdf, outfilename);
+        if (static_id)
+        {
+            // For the test suite, uncompress streams and use static
+            // IDs.
+            w.setStaticID(true); // for testing only
+        }
+        w.write();
+        std::cout << whoami << ": new file written to " << outfilename
+                  << std::endl;
     }
     catch (std::exception &e)
     {
-	std::cerr << whoami << " processing file " << infilename << ": "
-		  << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << " processing file " << infilename << ": "
+                  << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-linearize.c b/examples/pdf-linearize.c
index adeaffb4..2b099066 100644
--- a/examples/pdf-linearize.c
+++ b/examples/pdf-linearize.c
@@ -32,20 +32,20 @@ int main(int argc, char* argv[])
 
     if ((p = strrchr(argv[0], '/')) != NULL)
     {
-	whoami = p + 1;
+        whoami = p + 1;
     }
     else if ((p = strrchr(argv[0], '\\')) != NULL)
     {
-	whoami = p + 1;
+        whoami = p + 1;
     }
     else
     {
-	whoami = argv[0];
+        whoami = argv[0];
     }
 
     if (argc != 4)
     {
-	usage();
+        usage();
     }
 
     infile = argv[1];
@@ -53,36 +53,36 @@ int main(int argc, char* argv[])
     outfile = argv[3];
 
     if (((qpdf_read(qpdf, infile, password) & QPDF_ERRORS) == 0) &&
-	((qpdf_init_write(qpdf, outfile) & QPDF_ERRORS) == 0))
+        ((qpdf_init_write(qpdf, outfile) & QPDF_ERRORS) == 0))
     {
         /* Use static ID for testing only. For production, a
          * non-static ID is used. See also
          * qpdf_set_deterministic_ID. */
-	qpdf_set_static_ID(qpdf, QPDF_TRUE); /* for testing only */
-	qpdf_set_linearization(qpdf, QPDF_TRUE);
+        qpdf_set_static_ID(qpdf, QPDF_TRUE); /* for testing only */
+        qpdf_set_linearization(qpdf, QPDF_TRUE);
         qpdf_register_progress_reporter(qpdf, write_progress, infile);
-	qpdf_write(qpdf);
+        qpdf_write(qpdf);
     }
     while (qpdf_more_warnings(qpdf))
     {
-	warnings = 1;
-	printf("warning: %s\n",
-	       qpdf_get_error_full_text(qpdf, qpdf_next_warning(qpdf)));
+        warnings = 1;
+        printf("warning: %s\n",
+               qpdf_get_error_full_text(qpdf, qpdf_next_warning(qpdf)));
     }
     if (qpdf_has_error(qpdf))
     {
-	errors = 1;
-	printf("error: %s\n",
-	       qpdf_get_error_full_text(qpdf, qpdf_get_error(qpdf)));
+        errors = 1;
+        printf("error: %s\n",
+               qpdf_get_error_full_text(qpdf, qpdf_get_error(qpdf)));
     }
     qpdf_cleanup(&qpdf);
     if (errors)
     {
-	return 2;
+        return 2;
     }
     else if (warnings)
     {
-	return 3;
+        return 3;
     }
 
     return 0;
diff --git a/examples/pdf-mod-info.cc b/examples/pdf-mod-info.cc
index 20f13a7a..6067fcfe 100644
--- a/examples/pdf-mod-info.cc
+++ b/examples/pdf-mod-info.cc
@@ -16,39 +16,39 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr
-	<< "Usage: " << whoami
-	<< " --in in_file [--out out_file] [--key key [--val val]?]+\n"
-	<< "Modifies/Adds/Removes PDF /Info entries in the in_file\n"
-	<< "and stores the result in out_file\n"
-	<< "Special mode: " << whoami << " --dump file\n"
-	<< "dumps all /Info entries to stdout\n";
+        << "Usage: " << whoami
+        << " --in in_file [--out out_file] [--key key [--val val]?]+\n"
+        << "Modifies/Adds/Removes PDF /Info entries in the in_file\n"
+        << "and stores the result in out_file\n"
+        << "Special mode: " << whoami << " --dump file\n"
+        << "dumps all /Info entries to stdout\n";
     exit(2);
 }
 
 void dumpInfoDict(QPDF& pdf,
-		  std::ostream& os = std::cout,
-		  std::string const& sep = ":\t")
+                  std::ostream& os = std::cout,
+                  std::string const& sep = ":\t")
 {
     QPDFObjectHandle trailer = pdf.getTrailer();
     if (trailer.hasKey("/Info"))
     {
-	for (auto& it: trailer.getKey("/Info").ditems())
-	{
-	    std::string val;
-	    if (it.second.isString())
-	    {
-		val = it.second.getStringValue();
-	    }
-	    else if (it.second.isName())
-	    {
-		val = it.second.getName();
-	    }
-	    else // according to PDF Spec 1.5, shouldn't happen
-	    {
-		val = it.second.unparseResolved();
-	    }
-	    os << it.first.substr(1) << sep << val << std::endl; // skip '/'
-	}
+        for (auto& it: trailer.getKey("/Info").ditems())
+        {
+            std::string val;
+            if (it.second.isString())
+            {
+                val = it.second.getStringValue();
+            }
+            else if (it.second.isName())
+            {
+                val = it.second.getName();
+            }
+            else // according to PDF Spec 1.5, shouldn't happen
+            {
+                val = it.second.unparseResolved();
+            }
+            os << it.first.substr(1) << sep << val << std::endl; // skip '/'
+        }
     }
 }
 
@@ -56,14 +56,14 @@ void pdfDumpInfoDict(char const* fname)
 {
     try
     {
-	QPDF pdf;
-	pdf.processFile(fname);
-	dumpInfoDict(pdf);
+        QPDF pdf;
+        pdf.processFile(fname);
+        dumpInfoDict(pdf);
     }
     catch (std::exception& e)
     {
-	std::cerr << e.what() << std::endl;
-	exit(2);
+        std::cerr << e.what() << std::endl;
+        exit(2);
     }
 }
 
@@ -78,19 +78,19 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if ((argc == 2) && (! strcmp(argv[1], "--version")) )
     {
-	std::cout << whoami << " version " << version << std::endl;
-	exit(0);
+        std::cout << whoami << " version " << version << std::endl;
+        exit(0);
     }
     if ((argc == 3) && (! strcmp(argv[1], "--dump")))
     {
-	QTC::TC("examples", "pdf-mod-info --dump");
-	pdfDumpInfoDict(argv[2]);
-	exit(0);
+        QTC::TC("examples", "pdf-mod-info --dump");
+        pdfDumpInfoDict(argv[2]);
+        exit(0);
     }
 
     char* fl_in = 0;
@@ -99,59 +99,59 @@ int main(int argc, char* argv[])
 
     for (int i = 1; i < argc; ++i)
     {
-	if ((! strcmp(argv[i], "--in")) && (++i < argc))
-	{
-	    fl_in = argv[i];
-	}
-	else if ((! strcmp(argv[i], "--out")) && (++i < argc))
-	{
-	    fl_out = argv[i];
-	}
-	else if (! strcmp(argv[i], "--static-id")) // don't document
-	{
-	    static_id = true; // this should be used in test suites only
-	}
-	else if ((! strcmp(argv[i], "--key")) && (++i < argc))
-	{
-	    QTC::TC("examples", "pdf-mod-info -key");
-	    cur_key = argv[i];
-	    if (! ((cur_key.length() > 0) && (cur_key.at(0) == '/')))
-	    {
-		cur_key = "/" + cur_key;
-	    }
-	    Keys[cur_key] = "";
-	}
-	else if ((! strcmp(argv[i], "--val")) && (++i < argc))
-	{
-	    if (cur_key.empty())
-	    {
-		QTC::TC("examples", "pdf-mod-info usage wrong val");
-		usage();
-	    }
-	    QTC::TC("examples", "pdf-mod-info -val");
-	    Keys[cur_key] = argv[i];
-	    cur_key.clear();
-	}
-	else
-	{
-	    QTC::TC("examples", "pdf-mod-info usage junk");
-	    usage();
-	}
+        if ((! strcmp(argv[i], "--in")) && (++i < argc))
+        {
+            fl_in = argv[i];
+        }
+        else if ((! strcmp(argv[i], "--out")) && (++i < argc))
+        {
+            fl_out = argv[i];
+        }
+        else if (! strcmp(argv[i], "--static-id")) // don't document
+        {
+            static_id = true; // this should be used in test suites only
+        }
+        else if ((! strcmp(argv[i], "--key")) && (++i < argc))
+        {
+            QTC::TC("examples", "pdf-mod-info -key");
+            cur_key = argv[i];
+            if (! ((cur_key.length() > 0) && (cur_key.at(0) == '/')))
+            {
+                cur_key = "/" + cur_key;
+            }
+            Keys[cur_key] = "";
+        }
+        else if ((! strcmp(argv[i], "--val")) && (++i < argc))
+        {
+            if (cur_key.empty())
+            {
+                QTC::TC("examples", "pdf-mod-info usage wrong val");
+                usage();
+            }
+            QTC::TC("examples", "pdf-mod-info -val");
+            Keys[cur_key] = argv[i];
+            cur_key.clear();
+        }
+        else
+        {
+            QTC::TC("examples", "pdf-mod-info usage junk");
+            usage();
+        }
     }
     if (! fl_in)
     {
-	QTC::TC("examples", "pdf-mod-info no in file");
-	usage();
+        QTC::TC("examples", "pdf-mod-info no in file");
+        usage();
     }
     if (! fl_out)
     {
-	QTC::TC("examples", "pdf-mod-info in-place");
-	fl_out = fl_in;
+        QTC::TC("examples", "pdf-mod-info in-place");
+        fl_out = fl_in;
     }
     if (Keys.size() == 0)
     {
-	QTC::TC("examples", "pdf-mod-info no keys");
-	usage();
+        QTC::TC("examples", "pdf-mod-info no keys");
+        usage();
     }
 
     std::string fl_tmp = fl_out;
@@ -159,62 +159,62 @@ int main(int argc, char* argv[])
 
     try
     {
-	QPDF file;
-	file.processFile(fl_in);
-
-	QPDFObjectHandle filetrailer = file.getTrailer();
-	QPDFObjectHandle fileinfo;
-
-	for (std::map<std::string, std::string>::const_iterator it =
-		 Keys.begin(); Keys.end() != it; ++it)
-	{
-	    if (! fileinfo.isInitialized())
-	    {
-		if (filetrailer.hasKey("/Info"))
-		{
-		    QTC::TC("examples", "pdf-mod-info has info");
-		    fileinfo = filetrailer.getKey("/Info");
-		}
-		else
-		{
-		    QTC::TC("examples", "pdf-mod-info file no info");
-		    fileinfo = QPDFObjectHandle::newDictionary();
-		    filetrailer.replaceKey("/Info", fileinfo);
-		}
-	    }
-	    if (it->second == "")
-	    {
-		fileinfo.removeKey(it->first);
-	    }
-	    else
-	    {
-		QPDFObjectHandle elt = fileinfo.newString(it->second);
-		elt.makeDirect();
-		fileinfo.replaceKey(it->first, elt);
-	    }
-	}
-	QPDFWriter w(file, fl_tmp.c_str());
-	w.setStreamDataMode(qpdf_s_preserve);
-	w.setLinearization(true);
-	w.setStaticID(static_id); // for testing only
-	w.write();
+        QPDF file;
+        file.processFile(fl_in);
+
+        QPDFObjectHandle filetrailer = file.getTrailer();
+        QPDFObjectHandle fileinfo;
+
+        for (std::map<std::string, std::string>::const_iterator it =
+                 Keys.begin(); Keys.end() != it; ++it)
+        {
+            if (! fileinfo.isInitialized())
+            {
+                if (filetrailer.hasKey("/Info"))
+                {
+                    QTC::TC("examples", "pdf-mod-info has info");
+                    fileinfo = filetrailer.getKey("/Info");
+                }
+                else
+                {
+                    QTC::TC("examples", "pdf-mod-info file no info");
+                    fileinfo = QPDFObjectHandle::newDictionary();
+                    filetrailer.replaceKey("/Info", fileinfo);
+                }
+            }
+            if (it->second == "")
+            {
+                fileinfo.removeKey(it->first);
+            }
+            else
+            {
+                QPDFObjectHandle elt = fileinfo.newString(it->second);
+                elt.makeDirect();
+                fileinfo.replaceKey(it->first, elt);
+            }
+        }
+        QPDFWriter w(file, fl_tmp.c_str());
+        w.setStreamDataMode(qpdf_s_preserve);
+        w.setLinearization(true);
+        w.setStaticID(static_id); // for testing only
+        w.write();
     }
     catch (std::exception& e)
     {
-	std::cerr << e.what() << std::endl;
-	exit(2);
+        std::cerr << e.what() << std::endl;
+        exit(2);
     }
 
     try
     {
-	(void) remove(fl_out);
-	QUtil::os_wrapper("rename " + fl_tmp + " " + std::string(fl_out),
-			  rename(fl_tmp.c_str(), fl_out));
+        (void) remove(fl_out);
+        QUtil::os_wrapper("rename " + fl_tmp + " " + std::string(fl_out),
+                          rename(fl_tmp.c_str(), fl_out));
     }
     catch (std::exception& e)
     {
-	std::cerr << e.what() << std::endl;
-	exit(2);
+        std::cerr << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-name-number-tree.cc b/examples/pdf-name-number-tree.cc
index cfae4a6b..2f16b5f0 100644
--- a/examples/pdf-name-number-tree.cc
+++ b/examples/pdf-name-number-tree.cc
@@ -11,9 +11,9 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " outfile.pdf"
-	      << std::endl
-	      << "Create some name/number trees and write to a file"
-	      << std::endl;
+              << std::endl
+              << "Create some name/number trees and write to a file"
+              << std::endl;
     exit(2);
 }
 
@@ -24,12 +24,12 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if (argc != 2)
     {
-	usage();
+        usage();
     }
 
     char const* outfilename = argv[1];
diff --git a/examples/pdf-npages.cc b/examples/pdf-npages.cc
index c62d33de..d39c6434 100644
--- a/examples/pdf-npages.cc
+++ b/examples/pdf-npages.cc
@@ -10,7 +10,7 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " filename" << std::endl
-	      << "Prints the number of pages in filename" << std::endl;
+              << "Prints the number of pages in filename" << std::endl;
     exit(2);
 }
 
@@ -21,34 +21,34 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if ((argc == 2) && (strcmp(argv[1], "--version") == 0))
     {
-	std::cout << whoami << " version 1.3" << std::endl;
-	exit(0);
+        std::cout << whoami << " version 1.3" << std::endl;
+        exit(0);
     }
 
     if (argc != 2)
     {
-	usage();
+        usage();
     }
     char const* filename = argv[1];
 
     try
     {
-	QPDF pdf;
-	pdf.processFile(filename);
-	QPDFObjectHandle root = pdf.getRoot();
-	QPDFObjectHandle pages = root.getKey("/Pages");
-	QPDFObjectHandle count = pages.getKey("/Count");
-	std::cout << count.getIntValue() << std::endl;
+        QPDF pdf;
+        pdf.processFile(filename);
+        QPDFObjectHandle root = pdf.getRoot();
+        QPDFObjectHandle pages = root.getKey("/Pages");
+        QPDFObjectHandle count = pages.getKey("/Count");
+        std::cout << count.getIntValue() << std::endl;
     }
     catch (std::exception& e)
     {
-	std::cerr << whoami << ": " << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << ": " << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-overlay-page.cc b/examples/pdf-overlay-page.cc
index 7b8888e4..def047c5 100644
--- a/examples/pdf-overlay-page.cc
+++ b/examples/pdf-overlay-page.cc
@@ -17,10 +17,10 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " infile pagefile outfile"
-	      << std::endl
-	      << "Stamp page 1 of pagefile on every page of infile,"
+              << std::endl
+              << "Stamp page 1 of pagefile on every page of infile,"
               << " writing to outfile"
-	      << std::endl;
+              << std::endl;
     exit(2);
 }
 
@@ -91,7 +91,7 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if (argc != 4)
@@ -108,8 +108,8 @@ int main(int argc, char* argv[])
     }
     catch (std::exception &e)
     {
-	std::cerr << whoami << ": " << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << ": " << e.what() << std::endl;
+        exit(2);
     }
     return 0;
 }
diff --git a/examples/pdf-parse-content.cc b/examples/pdf-parse-content.cc
index f1680f72..89460e18 100644
--- a/examples/pdf-parse-content.cc
+++ b/examples/pdf-parse-content.cc
@@ -13,7 +13,7 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " filename page-number" << std::endl
-	      << "Prints a dump of the objects in the content streams"
+              << "Prints a dump of the objects in the content streams"
               << " of the given page." << std::endl
               << "Pages are numbered from 1." << std::endl;
     exit(2);
@@ -66,20 +66,20 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if (argc != 3)
     {
-	usage();
+        usage();
     }
     char const* filename = argv[1];
     int pageno = QUtil::string_to_int(argv[2]);
 
     try
     {
-	QPDF pdf;
-	pdf.processFile(filename);
+        QPDF pdf;
+        pdf.processFile(filename);
         std::vector<QPDFPageObjectHelper> pages =
             QPDFPageDocumentHelper(pdf).getAllPages();
         if ((pageno < 1) || (QIntC::to_size(pageno) > pages.size()))
@@ -93,8 +93,8 @@ int main(int argc, char* argv[])
     }
     catch (std::exception& e)
     {
-	std::cerr << whoami << ": " << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << ": " << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-set-form-values.cc b/examples/pdf-set-form-values.cc
index becbedf3..ddd3b2dd 100644
--- a/examples/pdf-set-form-values.cc
+++ b/examples/pdf-set-form-values.cc
@@ -13,8 +13,8 @@ static char const* whoami = 0;
 void usage()
 {
     std::cerr << "Usage: " << whoami << " infile.pdf outfile.pdf value"
-	      << std::endl
-	      << "Set the value of all text fields to a specified value"
+              << std::endl
+              << "Set the value of all text fields to a specified value"
               << std::endl;
     exit(2);
 }
@@ -27,7 +27,7 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if (argc != 4)
@@ -47,8 +47,8 @@ int main(int argc, char* argv[])
 
     try
     {
-	QPDF qpdf;
-	qpdf.processFile(infilename);
+        QPDF qpdf;
+        qpdf.processFile(infilename);
 
         // We will iterate through form fields by starting at the page
         // level and looking at each field for each page. We could
@@ -94,16 +94,16 @@ int main(int argc, char* argv[])
             }
         }
 
-	// Write out a new file
-	QPDFWriter w(qpdf, outfilename);
+        // Write out a new file
+        QPDFWriter w(qpdf, outfilename);
         w.setStaticID(true); // for testing only
-	w.write();
+        w.write();
     }
     catch (std::exception &e)
     {
-	std::cerr << whoami << " processing file " << infilename << ": "
-		  << e.what() << std::endl;
-	exit(2);
+        std::cerr << whoami << " processing file " << infilename << ": "
+                  << e.what() << std::endl;
+        exit(2);
     }
 
     return 0;
diff --git a/examples/pdf-split-pages.cc b/examples/pdf-split-pages.cc
index ea1c92bc..381480ef 100644
--- a/examples/pdf-split-pages.cc
+++ b/examples/pdf-split-pages.cc
@@ -38,13 +38,13 @@ static void process(char const* whoami,
         outpdf.emptyPDF();
         QPDFPageDocumentHelper(outpdf).addPage(page, false);
         QPDFWriter outpdfw(outpdf, outfile.c_str());
-	if (static_id)
-	{
-	    // For the test suite, uncompress streams and use static
-	    // IDs.
-	    outpdfw.setStaticID(true); // for testing only
-	    outpdfw.setStreamDataMode(qpdf_s_uncompress);
-	}
+        if (static_id)
+        {
+            // For the test suite, uncompress streams and use static
+            // IDs.
+            outpdfw.setStaticID(true); // for testing only
+            outpdfw.setStreamDataMode(qpdf_s_uncompress);
+        }
         outpdfw.write();
     }
 }
@@ -62,7 +62,7 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
     // For test suite
     if ((argc > 1) && (strcmp(argv[1], " --static-id") == 0))
diff --git a/examples/qpdf-job.cc b/examples/qpdf-job.cc
index 29f23a34..f3905e0d 100644
--- a/examples/qpdf-job.cc
+++ b/examples/qpdf-job.cc
@@ -30,7 +30,7 @@ int main(int argc, char* argv[])
     // For libtool's sake....
     if (strncmp(whoami, "lt-", 3) == 0)
     {
-	whoami += 3;
+        whoami += 3;
     }
 
     if (argc != 1)
diff --git a/examples/qpdfjob-c.c b/examples/qpdfjob-c.c
index ac58b8ae..ad81655a 100644
--- a/examples/qpdfjob-c.c
+++ b/examples/qpdfjob-c.c
@@ -26,20 +26,20 @@ int main(int argc, char* argv[])
 
     if ((p = strrchr(argv[0], '/')) != NULL)
     {
-	whoami = p + 1;
+        whoami = p + 1;
     }
     else if ((p = strrchr(argv[0], '\\')) != NULL)
     {
-	whoami = p + 1;
+        whoami = p + 1;
     }
     else
     {
-	whoami = argv[0];
+        whoami = argv[0];
     }
 
     if (argc != 3)
     {
-	usage();
+        usage();
     }
 
     infile = argv[1];
diff --git a/examples/qtest/bookmarks.test b/examples/qtest/bookmarks.test
index cff8fc60..e5e3172b 100644
--- a/examples/qtest/bookmarks.test
+++ b/examples/qtest/bookmarks.test
@@ -15,38 +15,38 @@ foreach my $show ("", " --show-open")
     {
         my $xshow = $show ? $show : "x";
         my $xstyle = $style ? $style : "x";
-	my $out = "test.$xshow.$xstyle.out";
-	$out =~ s/ //g;
-	$td->runtest("show:$show, style:$style",
-		     {$td->COMMAND => "pdf-bookmarks $show $style 1.pdf"},
-		     {$td->FILE => $out, $td->EXIT_STATUS => 0},
-		     $td->NORMALIZE_NEWLINES);
+        my $out = "test.$xshow.$xstyle.out";
+        $out =~ s/ //g;
+        $td->runtest("show:$show, style:$style",
+                     {$td->COMMAND => "pdf-bookmarks $show $style 1.pdf"},
+                     {$td->FILE => $out, $td->EXIT_STATUS => 0},
+                     $td->NORMALIZE_NEWLINES);
     }
 }
 $td->runtest("no bookmarks",
-	     {$td->COMMAND => "pdf-bookmarks 2.pdf"},
-	     {$td->STRING => "2.pdf has no bookmarks\n",
-	      $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "pdf-bookmarks 2.pdf"},
+             {$td->STRING => "2.pdf has no bookmarks\n",
+              $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("bad",
-	     {$td->COMMAND => "pdf-bookmarks 3.pdf"},
-	     {$td->REGEXP => "pdf-bookmarks processing file 3.pdf: " .
-		  ".*unable to find trailer.*",
-		  $td->EXIT_STATUS => 2},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "pdf-bookmarks 3.pdf"},
+             {$td->REGEXP => "pdf-bookmarks processing file 3.pdf: " .
+                  ".*unable to find trailer.*",
+                  $td->EXIT_STATUS => 2},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("encrypted, targets",
-	     {$td->COMMAND => "pdf-bookmarks --show-targets 4.pdf user"},
-	     {$td->FILE => "encrypted.out",
-	      $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "pdf-bookmarks --show-targets 4.pdf user"},
+             {$td->FILE => "encrypted.out",
+              $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("bookmarks deleted",
-	     {$td->COMMAND => "pdf-bookmarks 5.pdf user"},
-	     {$td->STRING => "5.pdf has no bookmarks\n",
-	      $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "pdf-bookmarks 5.pdf user"},
+             {$td->STRING => "5.pdf has no bookmarks\n",
+              $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("non-trivial pdf doc to unicode",
              {$td->COMMAND => "pdf-bookmarks issue-179.pdf"},
diff --git a/examples/qtest/count-strings.test b/examples/qtest/count-strings.test
index ba3f835b..c56d1b62 100644
--- a/examples/qtest/count-strings.test
+++ b/examples/qtest/count-strings.test
@@ -10,8 +10,8 @@ require TestDriver;
 my $td = new TestDriver('pdf-count-strings');
 
 $td->runtest("filter tokens",
-	     {$td->COMMAND => "pdf-count-strings in.pdf"},
-	     {$td->FILE => "out", $td->EXIT_STATUS => 0},
+             {$td->COMMAND => "pdf-count-strings in.pdf"},
+             {$td->FILE => "out", $td->EXIT_STATUS => 0},
              $td->NORMALIZE_NEWLINES);
 
 $td->report(1);
diff --git a/examples/qtest/create.test b/examples/qtest/create.test
index f18c5fd6..6bf075f4 100644
--- a/examples/qtest/create.test
+++ b/examples/qtest/create.test
@@ -12,8 +12,8 @@ cleanup();
 my $td = new TestDriver('create');
 
 $td->runtest("create a simple PDF",
-	     {$td->COMMAND => "pdf-create a.pdf"},
-	     {$td->FILE => "create.out", $td->EXIT_STATUS => 0},
+             {$td->COMMAND => "pdf-create a.pdf"},
+             {$td->FILE => "create.out", $td->EXIT_STATUS => 0},
              $td->NORMALIZE_NEWLINES);
 
 cleanup();
diff --git a/examples/qtest/double-page-size.test b/examples/qtest/double-page-size.test
index 780a8f0d..a7d6968e 100644
--- a/examples/qtest/double-page-size.test
+++ b/examples/qtest/double-page-size.test
@@ -12,16 +12,16 @@ my $td = new TestDriver('double-page-size');
 cleanup();
 
 $td->runtest("double page size",
-	     {$td->COMMAND => ['pdf-double-page-size', ' --static-id',
+             {$td->COMMAND => ['pdf-double-page-size', ' --static-id',
                                'in.pdf', 'a.pdf']},
-	     {$td->STRING =>
-		  "pdf-double-page-size: new file written to a.pdf\n",
-	      $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->STRING =>
+                  "pdf-double-page-size: new file written to a.pdf\n",
+              $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("check output",
-	     {$td->FILE => "a.pdf"},
-	     {$td->FILE => "out.pdf"});
+             {$td->FILE => "a.pdf"},
+             {$td->FILE => "out.pdf"});
 
 cleanup();
 
diff --git a/examples/qtest/filter-tokens.test b/examples/qtest/filter-tokens.test
index e7e458ac..3275dbc4 100644
--- a/examples/qtest/filter-tokens.test
+++ b/examples/qtest/filter-tokens.test
@@ -12,12 +12,12 @@ my $td = new TestDriver('pdf-filter-tokens');
 cleanup();
 
 $td->runtest("filter tokens",
-	     {$td->COMMAND => "pdf-filter-tokens in.pdf a.pdf"},
-	     {$td->STRING => "", $td->EXIT_STATUS => 0});
+             {$td->COMMAND => "pdf-filter-tokens in.pdf a.pdf"},
+             {$td->STRING => "", $td->EXIT_STATUS => 0});
 
 $td->runtest("check output",
-	     {$td->FILE => "a.pdf"},
-	     {$td->FILE => "out.pdf"});
+             {$td->FILE => "a.pdf"},
+             {$td->FILE => "out.pdf"});
 
 cleanup();
 
diff --git a/examples/qtest/invert-images.test b/examples/qtest/invert-images.test
index 33ffca47..d1e3c939 100644
--- a/examples/qtest/invert-images.test
+++ b/examples/qtest/invert-images.test
@@ -12,16 +12,16 @@ my $td = new TestDriver('invert-images');
 cleanup();
 
 $td->runtest("invert images",
-	     {$td->COMMAND => ['pdf-invert-images', ' --static-id',
+             {$td->COMMAND => ['pdf-invert-images', ' --static-id',
                                'in.pdf', 'a.pdf']},
-	     {$td->STRING =>
-		  "pdf-invert-images: new file written to a.pdf\n",
-	      $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->STRING =>
+                  "pdf-invert-images: new file written to a.pdf\n",
+              $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("check output",
-	     {$td->FILE => "a.pdf"},
-	     {$td->FILE => "out.pdf"});
+             {$td->FILE => "a.pdf"},
+             {$td->FILE => "out.pdf"});
 
 cleanup();
 
diff --git a/examples/qtest/linearize.test b/examples/qtest/linearize.test
index 94fbcd05..711e697b 100644
--- a/examples/qtest/linearize.test
+++ b/examples/qtest/linearize.test
@@ -14,14 +14,14 @@ my $td = new TestDriver('linearize');
 my $qpdf = $ENV{'QPDF_BIN'} or die;
 
 $td->runtest("linearize",
-	     {$td->COMMAND => "pdf-linearize input.pdf '' a.pdf"},
-	     {$td->REGEXP => '(?s).*input\.pdf progress: \d+\%.*',
+             {$td->COMMAND => "pdf-linearize input.pdf '' a.pdf"},
+             {$td->REGEXP => '(?s).*input\.pdf progress: \d+\%.*',
                   $td->EXIT_STATUS => 0});
 
 $td->runtest("check",
-	     {$td->COMMAND => "$qpdf --check a.pdf"},
-	     {$td->FILE => "check.out", $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "$qpdf --check a.pdf"},
+             {$td->FILE => "check.out", $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 cleanup();
 
diff --git a/examples/qtest/mod-info.test b/examples/qtest/mod-info.test
index 5f927170..ec09df9e 100644
--- a/examples/qtest/mod-info.test
+++ b/examples/qtest/mod-info.test
@@ -16,65 +16,65 @@ my $qpdf = $ENV{'QPDF_BIN'} or die;
 cleanup();
 
 $td->runtest("usage #1",
-	     {$td->COMMAND => "$prg --in target.pdf"},
-	     {$td->FILE => "usage.out",
-	      $td->EXIT_STATUS => 2},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "$prg --in target.pdf"},
+             {$td->FILE => "usage.out",
+              $td->EXIT_STATUS => 2},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("usage #2",
-	     {$td->COMMAND => "$prg --key abc --val def"},
-	     {$td->FILE => "usage.out",
-	      $td->EXIT_STATUS => 2},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "$prg --key abc --val def"},
+             {$td->FILE => "usage.out",
+              $td->EXIT_STATUS => 2},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("usage #3",
-	     {$td->COMMAND => "$prg --key abc --val def abc"},
-	     {$td->FILE => "usage.out",
-	      $td->EXIT_STATUS => 2},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "$prg --key abc --val def abc"},
+             {$td->FILE => "usage.out",
+              $td->EXIT_STATUS => 2},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("usage #4",
-	     {$td->COMMAND => "$prg --in source1.pdf --key date --val 01/01/01 --val 12/12/12"},
-	     {$td->FILE => "usage.out",
-	      $td->EXIT_STATUS => 2},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "$prg --in source1.pdf --key date --val 01/01/01 --val 12/12/12"},
+             {$td->FILE => "usage.out",
+              $td->EXIT_STATUS => 2},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("dump #1",
-	     {$td->COMMAND => "$prg --dump files/source1.pdf"},
-	     {$td->FILE => "dump.out",
-	      $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "$prg --dump files/source1.pdf"},
+             {$td->FILE => "dump.out",
+              $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("dump #2",
-	     {$td->COMMAND => "$prg --dump files/no-info.pdf"},
-	     {$td->STRING => "",
-	      $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "$prg --dump files/no-info.pdf"},
+             {$td->STRING => "",
+              $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("dump #3",
-	     {$td->COMMAND => "$prg --dump files/empty-info.pdf"},
-	     {$td->STRING => "",
-	      $td->EXIT_STATUS => 0});
+             {$td->COMMAND => "$prg --dump files/empty-info.pdf"},
+             {$td->STRING => "",
+              $td->EXIT_STATUS => 0});
 
 run_and_cmp("modify Subject",
-	    "$prg --in files/source1.pdf --out out.pdf --key Subject " .
-	    "--val \"Export Business\"",
-	    "", "out.pdf", "files/1.qdf");
+            "$prg --in files/source1.pdf --out out.pdf --key Subject " .
+            "--val \"Export Business\"",
+            "", "out.pdf", "files/1.qdf");
 
 run_and_cmp("add Subject, remove Producer, modify CreationDate",
-	    "$prg --in files/source2.pdf --out out.pdf --key Subject " .
-	    "--val \"Tammlin\" --key Producer --key CreationDate --val 12/12",
-	    "", "out.pdf", "files/2.qdf");
+            "$prg --in files/source2.pdf --out out.pdf --key Subject " .
+            "--val \"Tammlin\" --key Producer --key CreationDate --val 12/12",
+            "", "out.pdf", "files/2.qdf");
 
 run_and_cmp("add Subject (empty-info file)",
-	    "$prg --in files/empty-info.pdf --out out.pdf --key Subject " .
-	    "--val Tammlin",
-	    "", "out.pdf", "files/3.qdf");
+            "$prg --in files/empty-info.pdf --out out.pdf --key Subject " .
+            "--val Tammlin",
+            "", "out.pdf", "files/3.qdf");
 
 copy("files/no-info.pdf", "no-info.pdf") or die "can't copy no-info: $!";
 run_and_cmp("in-place Producer added (no-info file)",
-	    "$prg --in no-info.pdf --key Producer --val \"Obivan Kinobi\"",
-	    "", "no-info.pdf", "files/4.qdf");
+            "$prg --in no-info.pdf --key Producer --val \"Obivan Kinobi\"",
+            "", "no-info.pdf", "files/4.qdf");
 
 cleanup();
 
@@ -89,12 +89,12 @@ sub run_and_cmp
 {
     my ($dsc, $cmd, $out, $fout, $fexp) = @_;
     $td->runtest($dsc,
-		 {$td->COMMAND => "$cmd --static-id"},
-		 {$td->STRING => $out,
-		  $td->EXIT_STATUS => 0});
+                 {$td->COMMAND => "$cmd --static-id"},
+                 {$td->STRING => $out,
+                  $td->EXIT_STATUS => 0});
     $td->runtest("$dsc output",
-		 {$td->COMMAND => "$qpdf --static-id" .
-		      " --no-original-object-ids -qdf $fout -"},
-		 {$td->FILE => $fexp,
-		  $td->EXIT_STATUS => 0});
+                 {$td->COMMAND => "$qpdf --static-id" .
+                      " --no-original-object-ids -qdf $fout -"},
+                 {$td->FILE => $fexp,
+                  $td->EXIT_STATUS => 0});
 }
diff --git a/examples/qtest/name-number-tree.test b/examples/qtest/name-number-tree.test
index f3e433fd..e7fcf24e 100644
--- a/examples/qtest/name-number-tree.test
+++ b/examples/qtest/name-number-tree.test
@@ -12,13 +12,13 @@ my $td = new TestDriver('name-number-tree');
 cleanup();
 
 $td->runtest("name/number tree",
-	     {$td->COMMAND => 'pdf-name-number-tree a.pdf'},
-	     {$td->FILE => 'nn.out', $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => 'pdf-name-number-tree a.pdf'},
+             {$td->FILE => 'nn.out', $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("check output",
-	     {$td->FILE => "a.pdf"},
-	     {$td->FILE => "out.pdf"});
+             {$td->FILE => "a.pdf"},
+             {$td->FILE => "out.pdf"});
 
 cleanup();
 
diff --git a/examples/qtest/npages.test b/examples/qtest/npages.test
index 191e8d8f..d41de55a 100644
--- a/examples/qtest/npages.test
+++ b/examples/qtest/npages.test
@@ -10,14 +10,14 @@ require TestDriver;
 my $td = new TestDriver('pdf-npages');
 
 $td->runtest("normal",
-	     {$td->COMMAND => "pdf-npages minimal.pdf"},
-	     {$td->STRING => "1\n", $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "pdf-npages minimal.pdf"},
+             {$td->STRING => "1\n", $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->runtest("error",
-	     {$td->COMMAND => "pdf-npages bad"},
-	     {$td->REGEXP => "pdf-npages: bad: unable to find trailer.*",
-	      $td->EXIT_STATUS => 2},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "pdf-npages bad"},
+             {$td->REGEXP => "pdf-npages: bad: unable to find trailer.*",
+              $td->EXIT_STATUS => 2},
+             $td->NORMALIZE_NEWLINES);
 
 $td->report(2);
diff --git a/examples/qtest/overlay-page.test b/examples/qtest/overlay-page.test
index a946b0ca..be9bcb10 100644
--- a/examples/qtest/overlay-page.test
+++ b/examples/qtest/overlay-page.test
@@ -12,18 +12,18 @@ my $td = new TestDriver('overlay-page');
 cleanup();
 
 $td->runtest("overlay-page",
-	     {$td->COMMAND => "pdf-overlay-page in.pdf stamp.pdf a.pdf"},
-	     {$td->STRING => "", $td->EXIT_STATUS => 0});
+             {$td->COMMAND => "pdf-overlay-page in.pdf stamp.pdf a.pdf"},
+             {$td->STRING => "", $td->EXIT_STATUS => 0});
 $td->runtest("compare files",
-	     {$td->FILE => "a.pdf"},
-	     {$td->FILE => "out.pdf"});
+             {$td->FILE => "a.pdf"},
+             {$td->FILE => "out.pdf"});
 
 $td->runtest("overlay-page with fields/ annotations",
-	     {$td->COMMAND => "pdf-overlay-page in.pdf annotations.pdf a.pdf"},
-	     {$td->STRING => "", $td->EXIT_STATUS => 0});
+             {$td->COMMAND => "pdf-overlay-page in.pdf annotations.pdf a.pdf"},
+             {$td->STRING => "", $td->EXIT_STATUS => 0});
 $td->runtest("compare files",
-	     {$td->FILE => "a.pdf"},
-	     {$td->FILE => "annotations-out.pdf"});
+             {$td->FILE => "a.pdf"},
+             {$td->FILE => "annotations-out.pdf"});
 
 cleanup();
 
diff --git a/examples/qtest/parse-content.test b/examples/qtest/parse-content.test
index a73566f8..6a9d94fc 100644
--- a/examples/qtest/parse-content.test
+++ b/examples/qtest/parse-content.test
@@ -10,8 +10,8 @@ require TestDriver;
 my $td = new TestDriver('pdf-parse-content');
 
 $td->runtest("parse content",
-	     {$td->COMMAND => "pdf-parse-content input.pdf 1"},
-	     {$td->FILE => "content.out", $td->EXIT_STATUS => 0},
-	     $td->NORMALIZE_NEWLINES);
+             {$td->COMMAND => "pdf-parse-content input.pdf 1"},
+             {$td->FILE => "content.out", $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
 
 $td->report(1);
diff --git a/examples/qtest/pdf-split-pages.test b/examples/qtest/pdf-split-pages.test
index ce271b35..05be22e0 100644
--- a/examples/qtest/pdf-split-pages.test
+++ b/examples/qtest/pdf-split-pages.test
@@ -12,16 +12,16 @@ my $td = new TestDriver('pdf-split-pages');
 cleanup();
 
 $td->runtest("split",
-	     {$td->COMMAND => "pdf-split-pages ' --static-id' in.pdf out"},
-	     {$td->STRING => "", $td->EXIT_STATUS => 0});
+             {$td->COMMAND => "pdf-split-pages ' --static-id' in.pdf out"},
+             {$td->STRING => "", $td->EXIT_STATUS => 0});
 
 $td->runtest("check page 1",
-	     {$td->FILE => "out1.pdf"},
-	     {$td->FILE => "exp1.pdf"});
+             {$td->FILE => "out1.pdf"},
+             {$td->FILE => "exp1.pdf"});
 
 $td->runtest("check page 2",
-	     {$td->FILE => "out2.pdf"},
-	     {$td->FILE => "exp2.pdf"});
+             {$td->FILE => "out2.pdf"},
+             {$td->FILE => "exp2.pdf"});
 
 cleanup();
 
diff --git a/examples/qtest/qpdf-job.test b/examples/qtest/qpdf-job.test
index d3a490ab..c19cc260 100644
--- a/examples/qtest/qpdf-job.test
+++ b/examples/qtest/qpdf-job.test
@@ -12,8 +12,8 @@ cleanup();
 my $td = new TestDriver('qpdf-job');
 
 $td->runtest("qpdf-job",
-	     {$td->COMMAND => "qpdf-job"},
-	     {$td->FILE => "out", $td->EXIT_STATUS => 0},
+             {$td->COMMAND => "qpdf-job"},
+             {$td->FILE => "out", $td->EXIT_STATUS => 0},
              $td->NORMALIZE_NEWLINES);
 for (my $i = 1; $i <= 3; ++$i)
 {
diff --git a/examples/qtest/qpdfjob-c.test b/examples/qtest/qpdfjob-c.test
index 33a55431..a01b2c64 100644
--- a/examples/qtest/qpdfjob-c.test
+++ b/examples/qtest/qpdfjob-c.test
@@ -12,12 +12,12 @@ cleanup();
 my $td = new TestDriver('qpdfjob-c');
 
 $td->runtest("qpdfjob-c",
-	     {$td->COMMAND => "qpdfjob-c in.pdf a.pdf"},
-	     {$td->STRING => "", $td->EXIT_STATUS => 0},
+             {$td->COMMAND => "qpdfjob-c in.pdf a.pdf"},
+             {$td->STRING => "", $td->EXIT_STATUS => 0},
              $td->NORMALIZE_NEWLINES);
 $td->runtest("check output",
-	     {$td->FILE => "a.pdf"},
-	     {$td->FILE => "out.pdf"});
+             {$td->FILE => "a.pdf"},
+             {$td->FILE => "out.pdf"});
 
 cleanup();
 
diff --git a/examples/qtest/set-form-values.test b/examples/qtest/set-form-values.test
index 92f1cef1..8c103379 100644
--- a/examples/qtest/set-form-values.test
+++ b/examples/qtest/set-form-values.test
@@ -12,11 +12,11 @@ my $td = new TestDriver('pdf-set-form-values');
 cleanup();
 
 $td->runtest("set form values",
-	     {$td->COMMAND => "pdf-set-form-values form-in.pdf a.pdf soup"},
-	     {$td->STRING => "", $td->EXIT_STATUS => 0});
+             {$td->COMMAND => "pdf-set-form-values form-in.pdf a.pdf soup"},
+             {$td->STRING => "", $td->EXIT_STATUS => 0});
 $td->runtest("compare files",
-	     {$td->FILE => "a.pdf"},
-	     {$td->FILE => "form-out.pdf"});
+             {$td->FILE => "a.pdf"},
+             {$td->FILE => "form-out.pdf"});
 
 cleanup();