33 lines
701 B
Plaintext
33 lines
701 B
Plaintext
pub fn safe_add(a: u256, b: u256) -> u256 {
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let result = a + b;
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require(result >= a, "Addition overflow");
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return result;
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}
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pub fn safe_sub(a: u256, b: u256) -> u256 {
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require(a >= b, "Subtraction underflow");
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return a - b;
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}
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pub fn safe_mul(a: u256, b: u256) -> u256 {
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if a == 0 {
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return 0;
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}
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let result = a * b;
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require(result / a == b, "Multiplication overflow");
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return result;
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}
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pub fn safe_div(a: u256, b: u256) -> u256 {
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require(b > 0, "Division by zero");
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return a / b;
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}
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pub fn max(a: u256, b: u256) -> u256 {
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return if a >= b { a } else { b };
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}
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pub fn min(a: u256, b: u256) -> u256 {
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return if a <= b { a } else { b };
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}
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