tree 3c58c20581a1d9eafa215be361f01333945a2d47
parent ec0ebe7727fd259a56591dbf212d5a27c7a45c81
author Lei Zhang <thestig@chromium.org> 1576778217 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1576778217 +0000

Add core/fxcrt/byteorder.h.

Since PDFium already imported Chromium's base/sys_byteorder.h, take
advantage of it in fxcrt to implement core/fxcrt/byteorder.h, which will
replace macros like FXWORD_GET_LSBFIRST. Add unit tests to make sure the
newly added functions work correctly.

Unlike the existing macros, the new code can avoid calculations when
necessary, and perform any necessary calculations using compiler
built-ins.

Change-Id: I97aaff22c10b1dd65bc4089f32b9c2cd5ec99f9f
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/64251
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>