implement ability to save PDF to memory, also update ChangeLog

1 files changed, 87 insertions, 34 deletions

diff --git a/libqpdf/QPDFWriter.cc b/libqpdf/QPDFWriter.cc
index 40368f69..7217ded7 100644
--- a/libqpdf/QPDFWriter.cc
+++ b/libqpdf/QPDFWriter.cc
@@ -4,7 +4,6 @@
 #include <qpdf/Pl_StdioFile.hh>
 #include <qpdf/Pl_Count.hh>
 #include <qpdf/Pl_Discard.hh>
-#include <qpdf/Pl_Buffer.hh>
 #include <qpdf/Pl_RC4.hh>
 #include <qpdf/Pl_AES_PDF.hh>
 #include <qpdf/Pl_Flate.hh>
@@ -21,32 +20,65 @@
 
 #include <stdlib.h>
 
+QPDFWriter::QPDFWriter(QPDF& pdf) :
+    pdf(pdf)
+{
+    init();
+}
+
 QPDFWriter::QPDFWriter(QPDF& pdf, char const* filename) :
-    pdf(pdf),
-    filename(filename),
-    file(0),
-    close_file(false),
-    normalize_content_set(false),
-    normalize_content(false),
-    stream_data_mode_set(false),
-    stream_data_mode(qpdf_s_compress),
-    qdf_mode(false),
-    static_id(false),
-    suppress_original_object_ids(false),
-    direct_stream_lengths(true),
-    encrypted(false),
-    preserve_encryption(true),
-    linearized(false),
-    object_stream_mode(qpdf_o_preserve),
-    encrypt_metadata(true),
-    encrypt_use_aes(false),
-    encryption_dict_objid(0),
-    next_objid(1),
-    cur_stream_length_id(0),
-    cur_stream_length(0),
-    added_newline(false),
-    max_ostream_index(0)
+    pdf(pdf)
+{
+    init();
+    setOutputFilename(filename);
+}
+
+void
+QPDFWriter::init()
+{
+    filename = 0;
+    file = 0;
+    close_file = false;
+    buffer_pipeline = 0;
+    output_buffer = 0;
+    normalize_content_set = false;
+    normalize_content = false;
+    stream_data_mode_set = false;
+    stream_data_mode = qpdf_s_compress;
+    qdf_mode = false;
+    static_id = false;
+    suppress_original_object_ids = false;
+    direct_stream_lengths = true;
+    encrypted = false;
+    preserve_encryption = true;
+    linearized = false;
+    object_stream_mode = qpdf_o_preserve;
+    encrypt_metadata = true;
+    encrypt_use_aes = false;
+    encryption_dict_objid = 0;
+    next_objid = 1;
+    cur_stream_length_id = 0;
+    cur_stream_length = 0;
+    added_newline = false;
+    max_ostream_index = 0;
+}
+
+QPDFWriter::~QPDFWriter()
+{
+    if (file && close_file)
+    {
+	fclose(file);
+    }
+    if (output_buffer)
+    {
+	delete output_buffer;
+    }
+}
+
+void
+QPDFWriter::setOutputFilename(char const* filename)
 {
+    this->filename = filename;
     if (filename == 0)
     {
 	this->filename = "standard output";
@@ -61,19 +93,25 @@ QPDFWriter::QPDFWriter(QPDF& pdf, char const* filename) :
 				    fopen(filename, "wb+"));
 	close_file = true;
     }
-    Pipeline* p = new Pl_StdioFile("qdf output", file);
+    Pipeline* p = new Pl_StdioFile("qpdf output", file);
     to_delete.push_back(p);
-    pipeline = new Pl_Count("qdf count", p);
-    to_delete.push_back(pipeline);
-    pipeline_stack.push_back(pipeline);
+    initializePipelineStack(p);
 }
 
-QPDFWriter::~QPDFWriter()
+void
+QPDFWriter::setOutputMemory()
 {
-    if (file && close_file)
-    {
-	fclose(file);
-    }
+    this->buffer_pipeline = new Pl_Buffer("qpdf output");
+    to_delete.push_back(this->buffer_pipeline);
+    initializePipelineStack(this->buffer_pipeline);
+}
+
+Buffer*
+QPDFWriter::getBuffer()
+{
+    Buffer* result = this->output_buffer;
+    this->output_buffer = 0;
+    return result;
 }
 
 void
@@ -566,6 +604,14 @@ QPDFWriter::pushPipeline(Pipeline* p)
 }
 
 void
+QPDFWriter::initializePipelineStack(Pipeline *p)
+{
+    this->pipeline = new Pl_Count("qpdf count", p);
+    to_delete.push_back(this->pipeline);
+    this->pipeline_stack.push_back(this->pipeline);
+}
+
+void
 QPDFWriter::activatePipelineStack()
 {
     Pl_Count* c = new Pl_Count("count", this->pipeline_stack.back());
@@ -1503,6 +1549,8 @@ QPDFWriter::generateObjectStreams()
 void
 QPDFWriter::write()
 {
+    // XXX Check output
+
     // Do preliminary setup
 
     if (this->linearized)
@@ -1656,6 +1704,11 @@ QPDFWriter::write()
 	fclose(this->file);
     }
     this->file = 0;
+    if (this->buffer_pipeline)
+    {
+	this->output_buffer = this->buffer_pipeline->getBuffer();
+	this->buffer_pipeline = 0;
+    }
 }
 
 void