57 lines
918 B
C
57 lines
918 B
C
/* Copyright 2019 Google LLC. All Rights Reserved. This file and proprietary
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source code may only be used and distributed under the Widevine Master
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License Agreement. */
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#include "stddef.h"
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#include "stdint.h"
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int SubOverflowIX(int a, int b, int* c) {
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if (a >= b) {
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if (c) {
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*c = a - b;
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}
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return 0;
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}
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return 1;
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}
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int SubOverflowU32(uint32_t a, uint32_t b, uint32_t* c) {
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if (a >= b) {
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if (c) {
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*c = a - b;
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}
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return 0;
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}
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return 1;
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}
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int SubOverflowU64(uint64_t a, uint64_t b, uint64_t* c) {
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if (a >= b) {
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if (c) {
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*c = a - b;
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}
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return 0;
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}
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return 1;
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}
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int AddOverflowUX(size_t a, size_t b, size_t* c) {
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if (SIZE_MAX - a >= b) {
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if (c) {
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*c = a + b;
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}
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return 0;
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}
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return 1;
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}
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int SubOverflowUX(size_t a, size_t b, size_t* c) {
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if (a >= b) {
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if (c) {
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*c = a - b;
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}
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return 0;
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}
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return 1;
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}
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