Allowing users to subclass InputSource and Pipeline to read and write
from/to arbitrary sources provides the maximum flexibility for users
who want to read and write from other than files or memory.
Since sourceforce automatically displays README-what-to-download.txt,
it is no longer necessary for this to be the default file on
Windows. Instead make one of the binary distributions the default on
Windows.
Previously only whitespace and comments did it. This fix is needed
for object streams whose last object is a literal (name, integer,
real, string) not terminated by space or newline.
Move object parsing code from QPDF to QPDFObjectHandle and
parameterize the parts of it that are specific to a QPDF object.
Provide a version that can't handle indirect objects and that can be
called on an arbitrary string.
A side effect of this change is that the offset used when reporting
invalid stream length has changed, but since the new value seems like
a better value than the old one, the test suite has been updated
rather than making the code backward compatible. This only effects
the offset reported for invalid streams that lack /Length or have an
invalid /Length key.
Updated some test code and exmaples to use QPDFObjectHandle::parse.
Supporting changes include adding a BufferInputSource constructor that
takes a string.
Add --copy-encryption and --encryption-file-password options to qpdf.
Also strengthen test suite for copying encryption. The strengthened
test suite would have caught the failure to preserve AES and the
failure to update the file version, which was invalidating the
encrypted data.
This fixes were to code added yesterday; the problems would not have
impacted any previously released code. These are all changes related
to the possibility that copyEncryptionParameters may be called on
behalf a different QPDF than the one being written.
