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Refactor qpdf processing

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Push calls to processFile and processInputSource into separate
functions in preparation for password recovery changes
This commit is contained in:
Jay Berkenbilt 2019-01-17 18:01:55 -05:00
parent e87d149918
commit e4fa5a3c2a
1 changed files with 43 additions and 20 deletions
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63
qpdf/qpdf.cc
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@ -3670,6 +3670,39 @@ ImageOptimizer::provideStreamData(int, int, Pipeline* pipeline)
false, false);
}
template <typename T>
static PointerHolder<QPDF> do_process(
void (QPDF::*fn)(T, char const*),
T item, char const* password,
Options& o, bool empty)
{
PointerHolder<QPDF> pdf = new QPDF;
set_qpdf_options(*pdf, o);
if (empty)
{
pdf->emptyPDF();
}
else
{
((*pdf).*fn)(item, password);
}
return pdf;
}
static PointerHolder<QPDF> process_file(char const* filename,
char const* password,
Options& o)
{
return do_process(&QPDF::processFile, filename, password, o,
strcmp(filename, "") == 0);
}
static PointerHolder<QPDF> process_input_source(
PointerHolder<InputSource> is, char const* password, Options& o)
{
return do_process(&QPDF::processInputSource, is, password, o, false);
}
static void handle_transformations(QPDF& pdf, Options& o)
{
QPDFPageDocumentHelper dh(pdf);
@ -3807,9 +3840,6 @@ static void handle_page_specs(QPDF& pdf, Options& o)
// the API, you can just create two different QPDF objects
// to the same underlying file with the same path to
// achieve the same affect.
PointerHolder<QPDF> qpdf_ph = new QPDF();
page_heap.push_back(qpdf_ph);
QPDF* qpdf = qpdf_ph.getPointer();
char const* password = page_spec.password;
if (o.encryption_file && (password == 0) &&
(page_spec.filename == o.encryption_file))
@ -3838,8 +3868,9 @@ static void handle_page_specs(QPDF& pdf, Options& o)
is = fis;
fis->setFilename(page_spec.filename.c_str());
}
qpdf->processInputSource(is, password);
page_spec_qpdfs[page_spec.filename] = qpdf;
PointerHolder<QPDF> qpdf_ph = process_input_source(is, password, o);
page_heap.push_back(qpdf_ph);
page_spec_qpdfs[page_spec.filename] = qpdf_ph.getPointer();
if (cis)
{
cis->stayOpen(false);
@ -4176,10 +4207,10 @@ static void set_writer_options(QPDF& pdf, Options& o, QPDFWriter& w)
}
if (o.copy_encryption)
{
QPDF encryption_pdf;
encryption_pdf.processFile(
o.encryption_file, o.encryption_file_password);
w.copyEncryptionParameters(encryption_pdf);
PointerHolder<QPDF> encryption_pdf =
process_file(
o.encryption_file, o.encryption_file_password, o);
w.copyEncryptionParameters(*encryption_pdf);
}
if (o.encrypt)
{
@ -4355,17 +4386,9 @@ int realmain(int argc, char* argv[])
try
{
QPDF pdf;
set_qpdf_options(pdf, o);
if (strcmp(o.infilename, "") == 0)
{
pdf.emptyPDF();
}
else
{
pdf.processFile(o.infilename, o.password);
}
PointerHolder<QPDF> pdf_ph =
process_file(o.infilename, o.password, o);
QPDF& pdf = *pdf_ph;
handle_transformations(pdf, o);
if (! o.page_specs.empty())
{