d9187c085b
This reverts commit 3b347232bc.
Reason for revert: tree done gone red.
Original change's description:
> SkMath takes some functions from from SkTypes
>
> Moved to include/core/SkMath.h: Sk{Is|}Align{2|4|8|Ptr}, SkLeftShift,
> SkAbs{32|}, SkM{ax|in}32 SkTM{in|ax}, SkTClamp, SkFastMin32, SkTPin.
>
> Change-Id: Ibcc07be0fc3677731048e7cc86006e7aa493cb92
> Reviewed-on: https://skia-review.googlesource.com/133381
> Auto-Submit: Hal Canary <halcanary@google.com>
> Reviewed-by: Ben Wagner <bungeman@google.com>
> Commit-Queue: Hal Canary <halcanary@google.com>
TBR=mtklein@google.com,halcanary@google.com,bungeman@google.com,reed@google.com
Change-Id: I44073cf397e2a3a6a941a90f0aa63c6396d4c742
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/152587
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
35 lines
907 B
C
35 lines
907 B
C
/*
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* Copyright 2018 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkSafe32_DEFINED
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#define SkSafe32_DEFINED
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#include "SkTypes.h"
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static constexpr int32_t Sk64_pin_to_s32(int64_t x) {
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return x < SK_MinS32 ? SK_MinS32 : (x > SK_MaxS32 ? SK_MaxS32 : (int32_t)x);
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}
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static constexpr int32_t Sk32_sat_add(int32_t a, int32_t b) {
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return Sk64_pin_to_s32((int64_t)a + (int64_t)b);
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}
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static constexpr int32_t Sk32_sat_sub(int32_t a, int32_t b) {
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return Sk64_pin_to_s32((int64_t)a - (int64_t)b);
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}
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// To avoid UBSAN complaints about 2's compliment overflows
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//
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static constexpr int32_t Sk32_can_overflow_add(int32_t a, int32_t b) {
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return (int32_t)((uint32_t)a + (uint32_t)b);
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}
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static constexpr int32_t Sk32_can_overflow_sub(int32_t a, int32_t b) {
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return (int32_t)((uint32_t)a - (uint32_t)b);
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}
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#endif
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