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// SPDX-License-Identifier: MPL-2.0
// (c) Hare authors <https://harelang.org>
// Returns true if the two byte sequences are identical.
//
// This function should NOT be used with sensitive data such as cryptographic
// hashes. In such a case, the constant-time [[crypto::compare]] should be used
// instead.
export fn equal(a: []u8, b: []u8) bool = {
if (len(a) != len(b)) {
return false;
};
for (let i = 0z; i < len(a); i += 1) {
if (a[i] != b[i]) {
return false;
};
};
return true;
};
@test fn equal() void = {
let a: []u8 = [1, 2, 3];
let b: []u8 = [1, 2, 3];
let c: []u8 = [1, 4, 5];
let d: []u8 = [1, 2, 3, 4];
let e: []u8 = [1, 2];
assert(equal(a, b));
assert(!equal(a, c));
assert(!equal(a, d));
assert(!equal(a, e));
};
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