commit 35ae65d5d04dc3fc75a635c90c5aa9bb1eda3812
author Herb Derby <herb@google.com> Fri Aug 11 14:00:50 2017 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Fri Aug 11 19:23:06 2017 +0000
tree 185d330eee186be755e9f32ae67cddc7b055783d
parent 4a31c46006d297b6230a72d1f7bbadb0ca6df429

SkSafeMath for tracking size_t overflow

Do multiply (mul) and add while tracking that the
calculation does not overflow, which can be checked with
ok().

The new unit test shows a couple examples.

Author:  Herb Derby <herb@google.com>
Change-Id: I7e67671d2488d67f21d47d9618736a6bae8f23c3
Reviewed-on: https://skia-review.googlesource.com/33721
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Herb Derby <herb@google.com>

gn/tests.gni

diff --git a/gn/tests.gni b/gn/tests.gni
index 26bdc94..c2f3759 100644
--- a/gn/tests.gni
+++ b/gn/tests.gni
@@ -191,6 +191,7 @@
   "$_tests/RoundRectTest.cpp",
   "$_tests/RRectInPathTest.cpp",
   "$_tests/RTreeTest.cpp",
+  "$_tests/SafeMathTest.cpp",
   "$_tests/ScalarTest.cpp",
   "$_tests/ScaleToSidesTest.cpp",
   "$_tests/SerializationTest.cpp",