tree d56a6cfb5beb7fe88c8f1ad41173720e125f3401
parent 244491fa800131fe92684212ad55fae0da4bb82b
author Lei Zhang <thestig@chromium.org> 1707433546 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1707433546 +0000

Give "V4" and "V5" parser code better names

In CPDF_Parser and related code, there are references to "CrossRefV4"
and "CrossRefV5". But what happened to V3? It turns out V4 means PDF 1.4
and before, where only cross reference tables existed. V5 means PDF 1.5
and later, as the PDF 1.5 spec introduced cross reference stream. With
this in mind, rename "CrossRefV4" to "CrossRefTable" and rename
"CrossRefV5" to "CrossRefStream". For "TrailerV4", simplify that to
"Trailer", as a cross reference stream has a dictionary built-in and
does not need a separate trailer dictionary. i.e. the trailer is only
ever associated with a cross reference table.

Similarly rename variables with "v4" or "v5" in their names. Rename a
few other variables along the way.

Change-Id: I11eb14099cb86401fd42375c31afe5ecf7171e99
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/116291
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Thomas Sepez <tsepez@google.com>
Commit-Queue: Lei Zhang <thestig@chromium.org>