Implement QPDFObjectHandle::parse

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.

1 files changed, 10 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 1b76b011..2bb4564a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2012-07-21  Jay Berkenbilt  <ejb@ql.org>
+
+	* Add new method QPDFObjectHandle::replaceDict to replace a
+	stream's dictionary.  Use with caution; see comments in
+	QPDFObjectHandle.hh.
+
+	* Add new method QPDFObjectHandle::parse for creation of
+	QPDFObjectHandle objects from string representations of the
+	objects.  Thanks to Tobias Hoffmann for the idea.
+
 2012-07-15  Jay Berkenbilt  <ejb@ql.org>
 
 	* add new QPDF::isEncrypted method that returns some additional