OpenSystemsDevelopment / qpdf

Refactor Pl_QPDFTokenizer

Fix test_driver comment

If Pl_Flate memory limit is exceeded do not attempt 'finish' processing

Guard against 0 byte writes in Pl_Buffer and Pl_String

Tidy qpdfjob-remove-annotations example

Refactor the creation of unresolved objects

Create unresolved objects only for objects in the xref table (except during
parsing of the xref table). Do not add indirect nulls into the the object
cache as the result of a cache miss during a call to getObject except
during parsing or creation/updating from JSON. To support this behaviour,
add new private methods getObjectForParser and getObjectForJSON.

As a result of this change, dangling references are treated as direct nulls
rather than indirect nulls.

Prepare for treating indirect references differently depending on whether
we are parsing a PDF file (in which case reference to objects not in the
xref table are null even if they are in the object cache) or whether parse
from user code (in which case an indirect reference can refer to a user
created object).

Fix writing reals with trailing '.' as JSON (fixes #1261)

libtests: include cstdint for GCC 15

GCC 15 starts to no longer include this by default, requiring it to be
explicitly included.

Error message:
libtests/cxx11.cc:75:16: error: ‘uint8_t’ was not declared in this scope
   75 |     check_size<uint8_t>(1, false);
      |                ^~~~~~~
libtests/cxx11.cc:10:1: note: ‘uint8_t’ is defined in header ‘<cstdint>’; this is probably fixable by adding ‘#include <cstdint>’
    9 | #include <regex>
  +++ |+#include <cstdint>
   10 | #include <type_traits>

Signed-off-by: Christopher Fore <csfore@posteo.net>

Adjust fuzzer memory limits and refactor Pl_RunLength::decode

Buffer output locally.
Add qpdf_fuzzer test case.

Also, add additional qpdf_fuzzer test case.

In QPDFWriter::willFilterStream remember unfilterable streams

Refactor xref reconstruction

Avoid unnecessary rescanning of lines and repositioning of input file.
Limit max size of tokens.

Adjust qpdf_fuzzer warnings limit

Remove unnecessary use of shared pointers and avoid unnecessary string
creation.

Avoid writing each space char individually.

Mark intentional unsigned integer wrapping in MD5_native::transform and adjust fuzzer memory limits

Wrap-around is intentional and generates false positives

Update TODO.md

Also, remove closed fuzz cases.