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Code Issues Releases Wiki Activity

Allow --show-object=trailer

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This commit is contained in:
Jay Berkenbilt 2018-12-21 14:30:22 -05:00
parent dd1aca552c
commit bb89382f93
4 changed files with 38 additions and 11 deletions
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2
ChangeLog
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@ -1,5 +1,7 @@
2018-12-21 Jay Berkenbilt <ejb@ql.org>
* Allow --show-object=trailer for showing the document trailer.
* You can now use eval $(qpdf --completion-bash) to enable bash
completion for qpdf. It's not perfect, but it works pretty well.

38
qpdf/qpdf.cc
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@ -112,6 +112,7 @@ struct Options
check_linearization(false),
show_linearization(false),
show_xref(false),
show_trailer(false),
show_obj(0),
show_gen(0),
show_raw_stream_data(false),
@ -185,6 +186,7 @@ struct Options
bool check_linearization;
bool show_linearization;
bool show_xref;
bool show_trailer;
int show_obj;
int show_gen;
bool show_raw_stream_data;
@ -511,7 +513,7 @@ ArgParser::initOptionTable()
(*t)["show-linearization"] = oe_bare(&ArgParser::argShowLinearization);
(*t)["show-xref"] = oe_bare(&ArgParser::argShowXref);
(*t)["show-object"] = oe_requiredParameter(
&ArgParser::argShowObject, "obj[,gen]");
&ArgParser::argShowObject, "trailer|obj[,gen]");
(*t)["raw-stream-data"] = oe_bare(&ArgParser::argRawStreamData);
(*t)["filtered-stream-data"] = oe_bare(&ArgParser::argFilteredStreamData);
(*t)["show-npages"] = oe_bare(&ArgParser::argShowNpages);
@ -929,14 +931,21 @@ ArgParser::argShowXref()
void
ArgParser::argShowObject(char* parameter)
{
char* obj = parameter;
char* gen = obj;
if ((gen = strchr(obj, ',')) != 0)
if (strcmp(parameter, "trailer") == 0)
{
*gen++ = 0;
o.show_gen = QUtil::string_to_int(gen);
o.show_trailer = true;
}
else
{
char* obj = parameter;
char* gen = obj;
if ((gen = strchr(obj, ',')) != 0)
{
*gen++ = 0;
o.show_gen = QUtil::string_to_int(gen);
}
o.show_obj = QUtil::string_to_int(obj);
}
o.show_obj = QUtil::string_to_int(obj);
o.require_outfile = false;
}
@ -1453,7 +1462,8 @@ automated test suites for software that uses the qpdf library.\n\
--check-linearization check file integrity and linearization status\n\
--show-linearization check and show all linearization data\n\
--show-xref show the contents of the cross-reference table\n\
--show-object=obj[,gen] show the contents of the given object\n\
--show-object=trailer|obj[,gen]\n\
show the contents of the given object\n\
--raw-stream-data show raw stream data instead of object contents\n\
--filtered-stream-data show filtered stream data instead of object contents\n\
--show-npages print the number of pages in the file\n\
@ -2374,7 +2384,15 @@ static void do_check(QPDF& pdf, Options& o, int& exit_code)
static void do_show_obj(QPDF& pdf, Options& o, int& exit_code)
{
QPDFObjectHandle obj = pdf.getObjectByID(o.show_obj, o.show_gen);
QPDFObjectHandle obj;
if (o.show_trailer)
{
obj = pdf.getTrailer();
}
else
{
obj = pdf.getObjectByID(o.show_obj, o.show_gen);
}
if (obj.isStream())
{
if (o.show_raw_stream_data || o.show_filtered_stream_data)
@ -2676,7 +2694,7 @@ static void do_inspection(QPDF& pdf, Options& o)
{
pdf.showXRefTable();
}
if (o.show_obj > 0)
if ((o.show_obj > 0) || o.show_trailer)
{
do_show_obj(pdf, o, exit_code);
}

8
qpdf/qtest/qpdf.test
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@ -2048,7 +2048,7 @@ $td->runtest("stream detected",
show_ntests();
# ----------
$td->notify("--- Extraction Tests ---");
$n_tests += 11;
$n_tests += 12;
$td->runtest("show xref",
{$td->COMMAND => "qpdf encrypted-with-images.pdf" .
@ -2122,6 +2122,12 @@ $td->runtest("show-xref-by-id-filtered",
{$td->FILE => "show-xref-by-id-filtered.out",
$td->EXIT_STATUS => 0});
$td->runtest("show trailer",
{$td->COMMAND => "qpdf minimal.pdf --show-object=trailer"},
{$td->FILE => "show-trailer.out",
$td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
show_ntests();
# ----------
$td->notify("--- Clear-text Metadata Tests ---");

1
qpdf/qtest/qpdf/show-trailer.out Normal file
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@ -0,0 +1 @@
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