diff options
| author |  Mike Reed <reed@google.com> | 2018-01-30 16:01:33 -0500 |
|---|---|---|
| committer |  Skia Commit-Bot <skia-commit-bot@chromium.org> | 2018-01-30 21:50:30 +0000 |
| commit | 1c5906f5623cc6b019281b35ba387f620f13f969 (patch) | |
| tree | e201ddee1e23358511484fbb9ce8ee9883972ae4 /include/private/SkSafe32.h | |
| parent | ce243ba1099127faf6367ae66e32b9e83c8ecc76 (diff) | |
saturate some irect ops for fuzzers
Bug: skia:
Change-Id: I1c4f879a455048652abb619814841cd687a0474a
Reviewed-on: https://skia-review.googlesource.com/101881
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Diffstat (limited to 'include/private/SkSafe32.h')
| -rw-r--r-- | include/private/SkSafe32.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/private/SkSafe32.h b/include/private/SkSafe32.h new file mode 100644 index 0000000000..40d4121b52 --- /dev/null +++ b/include/private/SkSafe32.h @@ -0,0 +1,29 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSafe32_DEFINED +#define SkSafe32_DEFINED + +static constexpr int32_t Sk64_pin_to_s32(int64_t x) { + return x < SK_MinS32 ? SK_MinS32 : (x > SK_MaxS32 ? SK_MaxS32 : x); +} + +static constexpr int32_t Sk32_sat_add(int32_t a, int32_t b) { + return Sk64_pin_to_s32((int64_t)a + (int64_t)b); +} + +static constexpr int32_t Sk32_sat_sub(int32_t a, int32_t b) { + return Sk64_pin_to_s32((int64_t)a - (int64_t)b); +} + +// To avoid UBSAN complaints about 2's compliment overflows +// +static constexpr int32_t Sk32_can_overflow_sub(int32_t a, int32_t b) { + return (int32_t)((uint32_t)a - (uint32_t)b); +} + +#endif |