tree c1670065996c714cfc62430b6a1de072f0ad4e40
parent 5623992135c922ef22d632b22511f56145aa87c3
author Lei Zhang <thestig@chromium.org> 1573078320 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1573078320 +0000

Avoid crashes in FPDFText_GetCharBox().

Make sure the out parameters are not nullptr before dereferencing them.
Add tests to verify this. Do the same for FPDFText_GetLooseCharBox().

Also use more interesting sentinel values rather than 0 for the purpose
of checking false return values mean the out parameters are unchanged.

Change-Id: Ib06b46021c413b8dfe77d50b17edce244de88d1b
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/61935
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>