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"source": "pragma solidity 0.4.18;\n\n\nlibrary ScriptHelpers {\n // To test with JS and compare with actual encoder. Maintaining for reference.\n // t = function() { return IEVMScriptExecutor.at('0x4bcdd59d6c77774ee7317fc1095f69ec84421e49').contract.execScript.getData(...[].slice.call(arguments)).slice(10).match(/.{1,64}/g) }\n // run = function() { return ScriptHelpers.new().then(sh => { sh.abiEncode.call(...[].slice.call(arguments)).then(a => console.log(a.slice(2).match(/.{1,64}/g)) ) }) }\n // This is truly not beautiful but lets no daydream to the day solidity gets reflection features\n\n function abiEncode(bytes _a, bytes _b, address[] _c) public pure returns (bytes d) {\n return encode(_a, _b, _c);\n }\n\n function encode(bytes memory _a, bytes memory _b, address[] memory _c) internal pure returns (bytes memory d) {\n // A is positioned after the 3 position words\n uint256 aPosition = 0x60;\n uint256 bPosition = aPosition + 32 * abiLength(_a);\n uint256 cPosition = bPosition + 32 * abiLength(_b);\n uint256 length = cPosition + 32 * abiLength(_c);\n\n d = new bytes(length);\n assembly {\n // Store positions\n mstore(add(d, 0x20), aPosition)\n mstore(add(d, 0x40), bPosition)\n mstore(add(d, 0x60), cPosition)\n }\n\n // Copy memory to correct position\n copy(d, getPtr(_a), aPosition, _a.length);\n copy(d, getPtr(_b), bPosition, _b.length);\n copy(d, getPtr(_c), cPosition, _c.length * 32); // 1 word per address\n }\n\n function abiLength(bytes memory _a) internal pure returns (uint256) {\n // 1 for length +\n // memory words + 1 if not divisible for 32 to offset word\n return 1 + (_a.length / 32) + (_a.length % 32 > 0 ? 1 : 0);\n }\n\n function abiLength(address[] _a) internal pure returns (uint256) {\n // 1 for length + 1 per item\n return 1 + _a.length;\n }\n\n function copy(bytes _d, uint256 _src, uint256 _pos, uint256 _length) internal pure {\n uint dest;\n assembly {\n dest := add(add(_d, 0x20), _pos)\n }\n memcpy(dest, _src, _length + 32);\n }\n\n function getPtr(bytes memory _x) internal pure returns (uint256 ptr) {\n assembly {\n ptr := _x\n }\n }\n\n function getPtr(address[] memory _x) internal pure returns (uint256 ptr) {\n assembly {\n ptr := _x\n }\n }\n\n function getSpecId(bytes _script) internal pure returns (uint32) {\n return uint32At(_script, 0);\n }\n\n function uint256At(bytes _data, uint256 _location) internal pure returns (uint256 result) {\n assembly {\n result := mload(add(_data, add(0x20, _location)))\n }\n }\n\n function addressAt(bytes _data, uint256 _location) internal pure returns (address result) {\n uint256 word = uint256At(_data, _location);\n\n assembly {\n result := div(and(word, 0xffffffffffffffffffffffffffffffffffffffff000000000000000000000000),\n 0x1000000000000000000000000)\n }\n }\n\n function uint32At(bytes _data, uint256 _location) internal pure returns (uint32 result) {\n uint256 word = uint256At(_data, _location);\n\n assembly {\n result := div(and(word, 0xffffffff00000000000000000000000000000000000000000000000000000000),\n 0x100000000000000000000000000000000000000000000000000000000)\n }\n }\n\n function locationOf(bytes _data, uint256 _location) internal pure returns (uint256 result) {\n assembly {\n result := add(_data, add(0x20, _location))\n }\n }\n\n function toBytes(bytes4 _sig) internal pure returns (bytes) {\n bytes memory payload = new bytes(4);\n payload[0] = bytes1(_sig);\n payload[1] = bytes1(_sig << 8);\n payload[2] = bytes1(_sig << 16);\n payload[3] = bytes1(_sig << 24);\n return payload;\n }\n\n function memcpy(uint _dest, uint _src, uint _len) public pure {\n uint256 src = _src;\n uint256 dest = _dest;\n uint256 len = _len;\n\n // Copy word-length chunks while possible\n for (; len >= 32; len -= 32) {\n assembly {\n mstore(dest, mload(src))\n }\n dest += 32;\n src += 32;\n }\n\n // Copy remaining bytes\n uint mask = 256 ** (32 - len) - 1;\n assembly {\n let srcpart := and(mload(src), not(mask))\n let destpart := and(mload(dest), mask)\n mstore(dest, or(destpart, srcpart))\n }\n }\n}", "sourcePath": "@aragon/os/contracts/evmscript/ScriptHelpers.sol", "ast": { 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