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Code Issues Releases Wiki Activity

C API: qpdf_oh_is_initialized

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This commit is contained in:
Jay Berkenbilt 2021-12-02 08:04:59 -05:00
parent bef2c2222a
commit e3cc171d02
7 changed files with 34 additions and 9 deletions
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2
ChangeLog
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@ -1,5 +1,7 @@
2021-12-02 Jay Berkenbilt <ejb@ql.org>
* C API: Add qpdf_oh_is_initialized.
* C API: Add qpdf_get_last_string_length to return the length of
the last string returned. This is necessary in order to fully
retrieve values of strings that may contain embedded null characters.

2
include/qpdf/qpdf-c.h
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@ -581,6 +581,8 @@ extern "C" {
* to.
*/
QPDF_DLL
QPDF_BOOL qpdf_oh_is_initialized(qpdf_data data, qpdf_oh oh);
QPDF_DLL
QPDF_BOOL qpdf_oh_is_bool(qpdf_data data, qpdf_oh oh);
QPDF_DLL

12
libqpdf/qpdf-c.cc
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@ -881,8 +881,7 @@ qpdf_oh_valid_internal(qpdf_data qpdf, qpdf_oh oh)
{
auto i = qpdf->oh_cache.find(oh);
bool result = ((i != qpdf->oh_cache.end()) &&
(i->second).getPointer() &&
(i->second)->isInitialized());
(i->second).getPointer());
if (! result)
{
QTC::TC("qpdf", "qpdf-c invalid object handle");
@ -892,11 +891,18 @@ qpdf_oh_valid_internal(qpdf_data qpdf, qpdf_oh oh)
qpdf->qpdf->getFilename(),
std::string("C API object handle ") +
QUtil::uint_to_string(oh),
0, "attempted access to unknown/uninitialized object handle"));
0, "attempted access to unknown object handle"));
}
return result;
}
QPDF_BOOL qpdf_oh_is_initialized(qpdf_data qpdf, qpdf_oh oh)
{
QTC::TC("qpdf", "qpdf-c called qpdf_oh_is_initialized");
return (qpdf_oh_valid_internal(qpdf, oh) &&
qpdf->oh_cache[oh]->isInitialized());
}
QPDF_BOOL qpdf_oh_is_bool(qpdf_data qpdf, qpdf_oh oh)
{
QTC::TC("qpdf", "qpdf-c called qpdf_oh_is_bool");

7
manual/qpdf-manual.xml
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@ -5133,6 +5133,13 @@ print "\n";
embedded null characters.
</para>
</listitem>
<listitem>
<para>
Add <function>qpdf_oh_is_initialized</function> to the
C API. While you can't directly create uninitialized objects
from the C API, you still have to be able to detect them.
</para>
</listitem>
</itemizedlist>
</listitem>
</itemizedlist>

7
qpdf/qpdf-ctest.c
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@ -512,6 +512,7 @@ static void test24(char const* infile,
qpdf_oh_get_object_id(qpdf, root_from_trailer));
qpdf_oh pages = qpdf_oh_get_key(qpdf, root, "/Pages");
assert(qpdf_oh_is_dictionary(qpdf, pages));
assert(qpdf_oh_is_initialized(qpdf, pages));
qpdf_oh kids = qpdf_oh_get_key(qpdf, pages, "/Kids");
assert(qpdf_oh_is_array(qpdf, kids));
assert(qpdf_oh_get_array_n_items(qpdf, kids) == 1);
@ -687,6 +688,12 @@ static void test24(char const* infile,
qpdf_set_suppress_original_object_IDs(qpdf, QPDF_TRUE);
qpdf_write(qpdf);
report_errors();
/* Make sure we detect uninitialized objects */
qpdf_data qpdf2 = qpdf_init();
trailer = qpdf_get_trailer(qpdf2);
assert(! qpdf_oh_is_initialized(qpdf2, trailer));
qpdf_cleanup(&qpdf2);
}
int main(int argc, char* argv[])

1
qpdf/qpdf.testcov
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@ -600,3 +600,4 @@ QPDF_pages findPage not found 0
qpdf overlay page with no resources 0
QPDFObjectHandle check ownership 0
qpdf weak crypto warning 0
qpdf-c called qpdf_oh_is_initialized 0

12
qpdf/qtest/qpdf/c-object-handles.out
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@ -7,18 +7,18 @@ item 0: 0 0.00
item 1: 0 0.00
item 2: 612 612.00
item 3: 792 792.00
warning: minimal.pdf (C API object handle 6): attempted access to unknown/uninitialized object handle
warning: minimal.pdf (C API object handle 6): attempted access to unknown object handle
code: 5
file: minimal.pdf
pos : 0
text: attempted access to unknown/uninitialized object handle
warning: minimal.pdf (C API object handle 9): attempted access to unknown/uninitialized object handle
text: attempted access to unknown object handle
warning: minimal.pdf (C API object handle 9): attempted access to unknown object handle
code: 5
file: minimal.pdf
pos : 0
text: attempted access to unknown/uninitialized object handle
warning: minimal.pdf (C API object handle 9): attempted access to unknown/uninitialized object handle
text: attempted access to unknown object handle
warning: minimal.pdf (C API object handle 9): attempted access to unknown object handle
code: 5
file: minimal.pdf
pos : 0
text: attempted access to unknown/uninitialized object handle
text: attempted access to unknown object handle