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Add reverseBits operations to Bytes.sol (#5724)

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Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>
This commit is contained in:
Ernesto García
2025-07-10 10:36:41 -06:00
committed by GitHub
parent 21cd7e8aa3
commit 5def3f7c7e
5 changed files with 257 additions and 0 deletions
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74
test/utils/Bytes.t.sol Normal file
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import {Test} from "forge-std/Test.sol";
import {Bytes} from "@openzeppelin/contracts/utils/Bytes.sol";
contract BytesTest is Test {
// REVERSE BITS
function testSymbolicReverseBytes32(bytes32 value) public pure {
assertEq(Bytes.reverseBytes32(Bytes.reverseBytes32(value)), value);
}
function testSymbolicReverseBytes16(bytes16 value) public pure {
assertEq(Bytes.reverseBytes16(Bytes.reverseBytes16(value)), value);
}
function testSymbolicReverseBytes16Dirty(bytes16 value) public pure {
assertEq(Bytes.reverseBytes16(Bytes.reverseBytes16(_dirtyBytes16(value))), value);
assertEq(Bytes.reverseBytes16(_dirtyBytes16(Bytes.reverseBytes16(value))), value);
}
function testSymbolicReverseBytes8(bytes8 value) public pure {
assertEq(Bytes.reverseBytes8(Bytes.reverseBytes8(value)), value);
}
function testSymbolicReverseBytes8Dirty(bytes8 value) public pure {
assertEq(Bytes.reverseBytes8(Bytes.reverseBytes8(_dirtyBytes8(value))), value);
assertEq(Bytes.reverseBytes8(_dirtyBytes8(Bytes.reverseBytes8(value))), value);
}
function testSymbolicReverseBytes4(bytes4 value) public pure {
assertEq(Bytes.reverseBytes4(Bytes.reverseBytes4(value)), value);
}
function testSymbolicReverseBytes4Dirty(bytes4 value) public pure {
assertEq(Bytes.reverseBytes4(Bytes.reverseBytes4(_dirtyBytes4(value))), value);
assertEq(Bytes.reverseBytes4(_dirtyBytes4(Bytes.reverseBytes4(value))), value);
}
function testSymbolicReverseBytes2(bytes2 value) public pure {
assertEq(Bytes.reverseBytes2(Bytes.reverseBytes2(value)), value);
}
function testSymbolicReverseBytes2Dirty(bytes2 value) public pure {
assertEq(Bytes.reverseBytes2(Bytes.reverseBytes2(_dirtyBytes2(value))), value);
assertEq(Bytes.reverseBytes2(_dirtyBytes2(Bytes.reverseBytes2(value))), value);
}
// Helpers
function _dirtyBytes16(bytes16 value) private pure returns (bytes16 dirty) {
assembly ("memory-safe") {
dirty := or(value, shr(128, not(0)))
}
}
function _dirtyBytes8(bytes8 value) private pure returns (bytes8 dirty) {
assembly ("memory-safe") {
dirty := or(value, shr(192, not(0)))
}
}
function _dirtyBytes4(bytes4 value) private pure returns (bytes4 dirty) {
assembly ("memory-safe") {
dirty := or(value, shr(224, not(0)))
}
}
function _dirtyBytes2(bytes2 value) private pure returns (bytes2 dirty) {
assembly ("memory-safe") {
dirty := or(value, shr(240, not(0)))
}
}
}