From 8ab52fa55808541a25dffa15532dd19b2e3084b0 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Mon, 21 Aug 2017 20:56:14 -0400
Subject: Combine writePCLm with writeStandard

Reduce code duplication
---
 libqpdf/QPDFWriter.cc | 125 +++++++++++++++++++-------------------------------
 1 file changed, 47 insertions(+), 78 deletions(-)

(limited to 'libqpdf')

diff --git a/libqpdf/QPDFWriter.cc b/libqpdf/QPDFWriter.cc
index a57d71f5..318c2fb7 100644
--- a/libqpdf/QPDFWriter.cc
+++ b/libqpdf/QPDFWriter.cc
@@ -2449,10 +2449,6 @@ QPDFWriter::write()
     {
 	writeLinearized();
     }
-    else if (this->pclm)
-    {
-        writePCLm();
-    }
     else
     {
 	writeStandard();
@@ -3160,18 +3156,8 @@ QPDFWriter::writeLinearized()
 }
 
 void
-QPDFWriter::writeStandard()
+QPDFWriter::enqueueObjectsStandard()
 {
-    if (this->deterministic_id)
-    {
-        pushMD5Pipeline();
-    }
-
-    // Start writing
-
-    writeHeader();
-    writeString(this->extra_header_text);
-
     if (this->preserve_unreferenced_objects)
     {
         QTC::TC("qpdf", "QPDFWriter preserve unreferenced standard");
@@ -3197,61 +3183,11 @@ QPDFWriter::writeStandard()
     {
 	enqueueObject(trailer.getKey(*iter));
     }
-
-    // Now start walking queue, output each object
-    while (this->object_queue.size())
-    {
-	QPDFObjectHandle cur_object = this->object_queue.front();
-	this->object_queue.pop_front();
-	writeObject(cur_object);
-    }
-
-    // Write out the encryption dictionary, if any
-    if (this->encrypted)
-    {
-	writeEncryptionDictionary();
-    }
-
-    // Now write out xref.  next_objid is now the number of objects.
-    qpdf_offset_t xref_offset = this->pipeline->getCount();
-    if (this->object_stream_to_objects.empty())
-    {
-	// Write regular cross-reference table
-	writeXRefTable(t_normal, 0, this->next_objid - 1, this->next_objid);
-    }
-    else
-    {
-	// Write cross-reference stream.
-	int xref_id = this->next_objid++;
-	writeXRefStream(xref_id, xref_id, xref_offset, t_normal,
-			0, this->next_objid - 1, this->next_objid);
-    }
-    writeString("startxref\n");
-    writeString(QUtil::int_to_string(xref_offset));
-    writeString("\n%%EOF\n");
-
-    if (this->deterministic_id)
-    {
-	QTC::TC("qpdf", "QPDFWriter standard deterministic ID",
-                this->object_stream_to_objects.empty() ? 0 : 1);
-        popPipelineStack();
-        assert(this->md5_pipeline == 0);
-    }
 }
 
 void
-QPDFWriter::writePCLm()
+QPDFWriter::enqueueObjectsPCLm()
 {
-    if (this->deterministic_id)
-    {
-        pushMD5Pipeline();
-    }
-
-    // Start writing
-
-    writeHeader();
-    writeString(this->extra_header_text);
-
     // Image transform stream content for page strip images.
     // Each of this new stream has to come after every page image
     // strip written in the pclm file.
@@ -3260,7 +3196,7 @@ QPDFWriter::writePCLm()
     // enqueue all pages first
     std::vector<QPDFObjectHandle> all = this->pdf.getAllPages();
     for (std::vector<QPDFObjectHandle>::iterator iter = all.begin();
-            iter != all.end(); ++iter)
+         iter != all.end(); ++iter)
     {
         // enqueue page
         enqueueObject(*iter);
@@ -3273,7 +3209,7 @@ QPDFWriter::writePCLm()
             (*iter).getKey("/Resources").getKey("/XObject");
         std::set<std::string> keys = strips.getKeys();
         for (std::set<std::string>::iterator image = keys.begin();
-                image != keys.end(); ++image)
+             image != keys.end(); ++image)
         {
             enqueueObject(strips.getKey(*image));
             enqueueObject(QPDFObjectHandle::newStream(
@@ -3284,28 +3220,59 @@ QPDFWriter::writePCLm()
     // Put root in queue.
     QPDFObjectHandle trailer = getTrimmedTrailer();
     enqueueObject(trailer.getKey("/Root"));
+}
+
+void
+QPDFWriter::writeStandard()
+{
+    if (this->deterministic_id)
+    {
+        pushMD5Pipeline();
+    }
+
+    // Start writing
+
+    writeHeader();
+    writeString(this->extra_header_text);
 
-    // Now start walking queue, output each object
+    if (this->pclm)
+    {
+        enqueueObjectsPCLm();
+    }
+    else
+    {
+        enqueueObjectsStandard();
+    }
+
+    // Now start walking queue, outputing each object. There shouldn't
+    // really be any here, but this will catch anything that somehow
+    // got missed.
     while (this->object_queue.size())
     {
-        QPDFObjectHandle cur_object = this->object_queue.front();
-        this->object_queue.pop_front();
-        writeObject(cur_object);
+	QPDFObjectHandle cur_object = this->object_queue.front();
+	this->object_queue.pop_front();
+	writeObject(cur_object);
+    }
+
+    // Write out the encryption dictionary, if any
+    if (this->encrypted)
+    {
+	writeEncryptionDictionary();
     }
 
     // Now write out xref.  next_objid is now the number of objects.
     qpdf_offset_t xref_offset = this->pipeline->getCount();
     if (this->object_stream_to_objects.empty())
     {
-        // Write regular cross-reference table
-        writeXRefTable(t_normal, 0, this->next_objid - 1, this->next_objid);
+	// Write regular cross-reference table
+	writeXRefTable(t_normal, 0, this->next_objid - 1, this->next_objid);
     }
     else
     {
-        // Write cross-reference stream.
-        int xref_id = this->next_objid++;
-        writeXRefStream(xref_id, xref_id, xref_offset, t_normal,
-                0, this->next_objid - 1, this->next_objid);
+	// Write cross-reference stream.
+	int xref_id = this->next_objid++;
+	writeXRefStream(xref_id, xref_id, xref_offset, t_normal,
+			0, this->next_objid - 1, this->next_objid);
     }
     writeString("startxref\n");
     writeString(QUtil::int_to_string(xref_offset));
@@ -3313,6 +3280,8 @@ QPDFWriter::writePCLm()
 
     if (this->deterministic_id)
     {
+	QTC::TC("qpdf", "QPDFWriter standard deterministic ID",
+                this->object_stream_to_objects.empty() ? 0 : 1);
         popPipelineStack();
         assert(this->md5_pipeline == 0);
     }
-- 
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