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Add QPDF::getXRefTable()

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This commit is contained in:
Masamichi Hosoda 2019-09-28 22:07:00 +09:00 committed by Jay Berkenbilt
parent 06b818dcd3
commit 46ac3e21b3
7 changed files with 142 additions and 1 deletions
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3
include/qpdf/QPDF.hh
View File

@ -239,6 +239,8 @@ class QPDF
QPDFObjectHandle getTrailer();
QPDF_DLL
QPDFObjectHandle getRoot();
QPDF_DLL
std::map<QPDFObjGen, QPDFXRefEntry> getXRefTable();
// Install this object handle as an indirect object and return an
// indirect reference to it.
@ -1400,6 +1402,7 @@ class QPDF
bool fixed_dangling_refs;
bool immediate_copy_from;
bool in_parse;
bool parsed;
// Linearization data
qpdf_offset_t first_xref_item_offset; // actual value from file

13
libqpdf/QPDF.cc
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@ -155,6 +155,7 @@ QPDF::Members::Members() :
fixed_dangling_refs(false),
immediate_copy_from(false),
in_parse(false),
parsed(false),
first_xref_item_offset(0),
uncompressed_after_compressed(false)
{
@ -431,6 +432,7 @@ QPDF::parse(char const* password)
initializeEncryption();
findAttachmentStreams();
this->m->parsed = true;
}
void
@ -2620,6 +2622,17 @@ QPDF::getRoot()
return root;
}
std::map<QPDFObjGen, QPDFXRefEntry>
QPDF::getXRefTable()
{
if (! this->m->parsed)
{
throw std::logic_error("QPDF::getXRefTable called before parsing.");
}
return this->m->xref_table;
}
void
QPDF::getObjectStreamData(std::map<int, int>& omap)
{

3
qpdf/build.mk
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@ -6,7 +6,8 @@ BINS_qpdf = \
test_pdf_doc_encoding \
test_pdf_unicode \
test_tokenizer \
test_unicode_filenames
test_unicode_filenames \
test_xref
CBINS_qpdf = qpdf-ctest
TARGETS_qpdf = $(foreach B,$(BINS_qpdf) $(CBINS_qpdf),qpdf/$(OUTPUT_DIR)/$(call binname,$(B)))

17
qpdf/qtest/qpdf.test
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@ -4017,6 +4017,23 @@ foreach my $i (qw(preserve disable generate))
$td->EXIT_STATUS => 0});
}
show_ntests();
# ----------
$td->notify("--- Get XRef Table ---");
$n_tests += 2;
$td->runtest("without object streams",
{$td->COMMAND => "test_xref minimal.pdf"},
{$td->FILE => "minimal-xref.out",
$td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
$td->runtest("with object streams",
{$td->COMMAND => "test_xref digitally-signed.pdf"},
{$td->FILE => "digitally-signed-xref.out",
$td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
show_ntests();
# ----------
$td->notify("--- Large File Tests ---");

30
qpdf/qtest/qpdf/digitally-signed-xref.out Normal file
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@ -0,0 +1,30 @@
1/0, uncompressed, offset = 64450 (0xfbc2)
2/0, uncompressed, offset = 65177 (0xfe99)
3/0, uncompressed, offset = 68242 (0x10a92)
4/0, uncompressed, offset = 68383 (0x10b1f)
5/0, uncompressed, offset = 68538 (0x10bba)
6/0, compressed, stream number = 1, stream index = 0
7/0, compressed, stream number = 1, stream index = 1
8/0, compressed, stream number = 1, stream index = 2
9/0, compressed, stream number = 3, stream index = 0
10/0, compressed, stream number = 4, stream index = 0
11/0, uncompressed, offset = 16 (0x10)
12/0, uncompressed, offset = 649 (0x289)
13/0, uncompressed, offset = 726 (0x2d6)
14/0, uncompressed, offset = 900 (0x384)
15/0, uncompressed, offset = 1049 (0x419)
16/0, uncompressed, offset = 1256 (0x4e8)
17/0, uncompressed, offset = 1382 (0x566)
18/0, uncompressed, offset = 2411 (0x96b)
19/0, uncompressed, offset = 57705 (0xe169)
20/0, uncompressed, offset = 59412 (0xe814)
21/0, uncompressed, offset = 59506 (0xe872)
22/0, uncompressed, offset = 116 (0x74)
23/0, compressed, stream number = 19, stream index = 0
24/0, compressed, stream number = 19, stream index = 1
25/0, compressed, stream number = 19, stream index = 2
26/0, compressed, stream number = 19, stream index = 3
27/0, compressed, stream number = 19, stream index = 4
28/0, compressed, stream number = 19, stream index = 5
29/0, compressed, stream number = 19, stream index = 6
30/0, uncompressed, offset = 471 (0x1d7)

6
qpdf/qtest/qpdf/minimal-xref.out Normal file
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@ -0,0 +1,6 @@
1/0, uncompressed, offset = 9 (0x9)
2/0, uncompressed, offset = 63 (0x3f)
3/0, uncompressed, offset = 135 (0x87)
4/0, uncompressed, offset = 307 (0x133)
5/0, uncompressed, offset = 403 (0x193)
6/0, uncompressed, offset = 438 (0x1b6)

71
qpdf/test_xref.cc Normal file
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@ -0,0 +1,71 @@
#include <qpdf/QPDF.hh>
#include <qpdf/QPDFObjGen.hh>
#include <qpdf/QPDFXRefEntry.hh>
#include <iostream>
#include <map>
#include <string>
#include <cstdlib>
int main(int argc, char *argv[])
{
if (argc != 2)
{
std::cerr << "usage: test_xref INPUT.pdf" << std::endl;
std::exit(2);
}
try
{
QPDF qpdf;
qpdf.processFile(argv[1]);
std::map<QPDFObjGen, QPDFXRefEntry> xref
= qpdf.getXRefTable();
for (std::map<QPDFObjGen, QPDFXRefEntry>::iterator iter = xref.begin();
iter != xref.end(); ++iter)
{
std::cout
<< iter->first.getObj() << "/" << iter->first.getGen()
<< ", ";
switch (iter->second.getType())
{
case 0:
std::cout
<< "free entry"
<< std::endl;
break;
case 1:
std::cout
<< "uncompressed, offset = "
<< iter->second.getOffset()
<< " (0x"
<< std::hex << iter->second.getOffset() << std::dec
<< ")"
<< std::endl;
break;
case 2:
std::cout
<< "compressed, stream number = "
<< iter->second.getObjStreamNumber()
<< ", stream index = "
<< iter->second.getObjStreamIndex()
<< std::endl;
break;
default:
std::cerr
<< "unknown"
<< std::endl;
std::exit(2);
}
}
}
catch (std::exception& e)
{
std::cerr << e.what() << std::endl;
std::exit(2);
}
return 0;
}