tree 21b46a303c2256b11bb185d7654cd92b158c8dc7
parent d9dcf21d3db567abb13eaf85587bef8880977200
author Lei Zhang <thestig@chromium.org> 1689377627 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1689377627 +0000

Optimize empty map cases in CPDF_CrossRefTable::UpdateInfo()

In the case where UpdateInfo() receives an empty map, that is
effectively a no-op. Just return early and avoid moving anything around.

In the cases where CPDF_CrossRefTable has an existing map that is empty,
simply take the new map in its entirety, instead of processing it one
element at a time.

Also remove the rvalue references. They are not needed in this case, per
the style guide.

Change-Id: I05ee6f768a8a22456206674ee48d57cace5fcb28
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/109730
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Nigi <nigi@chromium.org>