{ "contractName": "BytesLib", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.5.8+commit.23d335f2\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"solidity-bytes-utils/contracts/BytesLib.sol\":\"BytesLib\"},\"evmVersion\":\"constantinople\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"solidity-bytes-utils/contracts/BytesLib.sol\":{\"keccak256\":\"0xde793835499803e9a2b59683de8bca5b77e2c4dc63748cf8b72973193e65e656\",\"urls\":[\"bzzr://d3ab468bc9bcc85b245abea04a7dbe404db1f70d2f63e3b9b70ed1fde8138ee9\"]}},\"version\":1}", "bytecode": "0x604c6023600b82828239805160001a607314601657fe5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a72305820f585edd4c6350dc44d01ca6e9e826a567e13016b18da4073146080907aaa20810029", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a72305820f585edd4c6350dc44d01ca6e9e826a567e13016b18da4073146080907aaa20810029", "sourceMap": "325:18425:16:-;;132:2:-1;166:7;155:9;146:7;137:37;255:7;249:14;246:1;241:23;235:4;232:33;222:2;;269:9;222:2;293:9;290:1;283:20;323:4;314:7;306:22;347:7;338;331:24", "deployedSourceMap": "325:18425:16:-;;;;;;;;", "source": "/*\n * @title Solidity Bytes Arrays Utils\n * @author Gonçalo Sá \n *\n * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity.\n * The library lets you concatenate, slice and type cast bytes arrays both in memory and storage.\n */\n\npragma solidity ^0.5.0;\n\n\nlibrary BytesLib {\n function concat(\n bytes memory _preBytes,\n bytes memory _postBytes\n )\n internal\n pure\n returns (bytes memory)\n {\n bytes memory tempBytes;\n\n assembly {\n // Get a location of some free memory and store it in tempBytes as\n // Solidity does for memory variables.\n tempBytes := mload(0x40)\n\n // Store the length of the first bytes array at the beginning of\n // the memory for tempBytes.\n let length := mload(_preBytes)\n mstore(tempBytes, length)\n\n // Maintain a memory counter for the current write location in the\n // temp bytes array by adding the 32 bytes for the array length to\n // the starting location.\n let mc := add(tempBytes, 0x20)\n // Stop copying when the memory counter reaches the length of the\n // first bytes array.\n let end := add(mc, length)\n\n for {\n // Initialize a copy counter to the start of the _preBytes data,\n // 32 bytes into its memory.\n let cc := add(_preBytes, 0x20)\n } lt(mc, end) {\n // Increase both counters by 32 bytes each iteration.\n mc := add(mc, 0x20)\n cc := add(cc, 0x20)\n } {\n // Write the _preBytes data into the tempBytes memory 32 bytes\n // at a time.\n mstore(mc, mload(cc))\n }\n\n // Add the length of _postBytes to the current length of tempBytes\n // and store it as the new length in the first 32 bytes of the\n // tempBytes memory.\n length := mload(_postBytes)\n mstore(tempBytes, add(length, mload(tempBytes)))\n\n // Move the memory counter back from a multiple of 0x20 to the\n // actual end of the _preBytes data.\n mc := end\n // Stop copying when the memory counter reaches the new combined\n // length of the arrays.\n end := add(mc, length)\n\n for {\n let cc := add(_postBytes, 0x20)\n } lt(mc, end) {\n mc := add(mc, 0x20)\n cc := add(cc, 0x20)\n } {\n mstore(mc, mload(cc))\n }\n\n // Update the free-memory pointer by padding our last write location\n // to 32 bytes: add 31 bytes to the end of tempBytes to move to the\n // next 32 byte block, then round down to the nearest multiple of\n // 32. If the sum of the length of the two arrays is zero then add \n // one before rounding down to leave a blank 32 bytes (the length block with 0).\n mstore(0x40, and(\n add(add(end, iszero(add(length, mload(_preBytes)))), 31),\n not(31) // Round down to the nearest 32 bytes.\n ))\n }\n\n return tempBytes;\n }\n\n function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal {\n assembly {\n // Read the first 32 bytes of _preBytes storage, which is the length\n // of the array. (We don't need to use the offset into the slot\n // because arrays use the entire slot.)\n let fslot := sload(_preBytes_slot)\n // Arrays of 31 bytes or less have an even value in their slot,\n // while longer arrays have an odd value. The actual length is\n // the slot divided by two for odd values, and the lowest order\n // byte divided by two for even values.\n // If the slot is even, bitwise and the slot with 255 and divide by\n // two to get the length. If the slot is odd, bitwise and the slot\n // with -1 and divide by two.\n let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)\n let mlength := mload(_postBytes)\n let newlength := add(slength, mlength)\n // slength can contain both the length and contents of the array\n // if length < 32 bytes so let's prepare for that\n // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage\n switch add(lt(slength, 32), lt(newlength, 32))\n case 2 {\n // Since the new array still fits in the slot, we just need to\n // update the contents of the slot.\n // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length\n sstore(\n _preBytes_slot,\n // all the modifications to the slot are inside this\n // next block\n add(\n // we can just add to the slot contents because the\n // bytes we want to change are the LSBs\n fslot,\n add(\n mul(\n div(\n // load the bytes from memory\n mload(add(_postBytes, 0x20)),\n // zero all bytes to the right\n exp(0x100, sub(32, mlength))\n ),\n // and now shift left the number of bytes to\n // leave space for the length in the slot\n exp(0x100, sub(32, newlength))\n ),\n // increase length by the double of the memory\n // bytes length\n mul(mlength, 2)\n )\n )\n )\n }\n case 1 {\n // The stored value fits in the slot, but the combined value\n // will exceed it.\n // get the keccak hash to get the contents of the array\n mstore(0x0, _preBytes_slot)\n let sc := add(keccak256(0x0, 0x20), div(slength, 32))\n\n // save new length\n sstore(_preBytes_slot, add(mul(newlength, 2), 1))\n\n // The contents of the _postBytes array start 32 bytes into\n // the structure. Our first read should obtain the `submod`\n // bytes that can fit into the unused space in the last word\n // of the stored array. To get this, we read 32 bytes starting\n // from `submod`, so the data we read overlaps with the array\n // contents by `submod` bytes. Masking the lowest-order\n // `submod` bytes allows us to add that value directly to the\n // stored value.\n\n let submod := sub(32, slength)\n let mc := add(_postBytes, submod)\n let end := add(_postBytes, mlength)\n let mask := sub(exp(0x100, submod), 1)\n\n sstore(\n sc,\n add(\n and(\n fslot,\n 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00\n ),\n and(mload(mc), mask)\n )\n )\n\n for {\n mc := add(mc, 0x20)\n sc := add(sc, 1)\n } lt(mc, end) {\n sc := add(sc, 1)\n mc := add(mc, 0x20)\n } {\n sstore(sc, mload(mc))\n }\n\n mask := exp(0x100, sub(mc, end))\n\n sstore(sc, mul(div(mload(mc), mask), mask))\n }\n default {\n // get the keccak hash to get the contents of the array\n mstore(0x0, _preBytes_slot)\n // Start copying to the last used word of the stored array.\n let sc := add(keccak256(0x0, 0x20), div(slength, 32))\n\n // save new length\n sstore(_preBytes_slot, add(mul(newlength, 2), 1))\n\n // Copy over the first `submod` bytes of the new data as in\n // case 1 above.\n let slengthmod := mod(slength, 32)\n let mlengthmod := mod(mlength, 32)\n let submod := sub(32, slengthmod)\n let mc := add(_postBytes, submod)\n let end := add(_postBytes, mlength)\n let mask := sub(exp(0x100, submod), 1)\n\n sstore(sc, add(sload(sc), and(mload(mc), mask)))\n \n for { \n sc := add(sc, 1)\n mc := add(mc, 0x20)\n } lt(mc, end) {\n sc := add(sc, 1)\n mc := add(mc, 0x20)\n } {\n sstore(sc, mload(mc))\n }\n\n mask := exp(0x100, sub(mc, end))\n\n sstore(sc, mul(div(mload(mc), mask), mask))\n }\n }\n }\n\n function slice(\n bytes memory _bytes,\n uint _start,\n uint _length\n )\n internal\n pure\n returns (bytes memory)\n {\n require(_bytes.length >= (_start + _length));\n\n bytes memory tempBytes;\n\n assembly {\n switch iszero(_length)\n case 0 {\n // Get a location of some free memory and store it in tempBytes as\n // Solidity does for memory variables.\n tempBytes := mload(0x40)\n\n // The first word of the slice result is potentially a partial\n // word read from the original array. To read it, we calculate\n // the length of that partial word and start copying that many\n // bytes into the array. The first word we copy will start with\n // data we don't care about, but the last `lengthmod` bytes will\n // land at the beginning of the contents of the new array. When\n // we're done copying, we overwrite the full first word with\n // the actual length of the slice.\n let lengthmod := and(_length, 31)\n\n // The multiplication in the next line is necessary\n // because when slicing multiples of 32 bytes (lengthmod == 0)\n // the following copy loop was copying the origin's length\n // and then ending prematurely not copying everything it should.\n let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))\n let end := add(mc, _length)\n\n for {\n // The multiplication in the next line has the same exact purpose\n // as the one above.\n let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)\n } lt(mc, end) {\n mc := add(mc, 0x20)\n cc := add(cc, 0x20)\n } {\n mstore(mc, mload(cc))\n }\n\n mstore(tempBytes, _length)\n\n //update free-memory pointer\n //allocating the array padded to 32 bytes like the compiler does now\n mstore(0x40, and(add(mc, 31), not(31)))\n }\n //if we want a zero-length slice let's just return a zero-length array\n default {\n tempBytes := mload(0x40)\n\n mstore(0x40, add(tempBytes, 0x20))\n }\n }\n\n return tempBytes;\n }\n\n function toAddress(bytes memory _bytes, uint _start) internal pure returns (address) {\n require(_bytes.length >= (_start + 20));\n address tempAddress;\n\n assembly {\n tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000)\n }\n\n return tempAddress;\n }\n\n function toUint8(bytes memory _bytes, uint _start) internal pure returns (uint8) {\n require(_bytes.length >= (_start + 1));\n uint8 tempUint;\n\n assembly {\n tempUint := mload(add(add(_bytes, 0x1), _start))\n }\n\n return tempUint;\n }\n\n function toUint16(bytes memory _bytes, uint _start) internal pure returns (uint16) {\n require(_bytes.length >= (_start + 2));\n uint16 tempUint;\n\n assembly {\n tempUint := mload(add(add(_bytes, 0x2), _start))\n }\n\n return tempUint;\n }\n\n function toUint32(bytes memory _bytes, uint _start) internal pure returns (uint32) {\n require(_bytes.length >= (_start + 4));\n uint32 tempUint;\n\n assembly {\n tempUint := mload(add(add(_bytes, 0x4), _start))\n }\n\n return tempUint;\n }\n\n function toUint64(bytes memory _bytes, uint _start) internal pure returns (uint64) {\n require(_bytes.length >= (_start + 8));\n uint64 tempUint;\n\n assembly {\n tempUint := mload(add(add(_bytes, 0x8), _start))\n }\n\n return tempUint;\n }\n\n function toUint96(bytes memory _bytes, uint _start) internal pure returns (uint96) {\n require(_bytes.length >= (_start + 12));\n uint96 tempUint;\n\n assembly {\n tempUint := mload(add(add(_bytes, 0xc), _start))\n }\n\n return tempUint;\n }\n\n function toUint128(bytes memory _bytes, uint _start) internal pure returns (uint128) {\n require(_bytes.length >= (_start + 16));\n uint128 tempUint;\n\n assembly {\n tempUint := mload(add(add(_bytes, 0x10), _start))\n }\n\n return tempUint;\n }\n\n function toUint(bytes memory _bytes, uint _start) internal pure returns (uint256) {\n require(_bytes.length >= (_start + 32));\n uint256 tempUint;\n\n assembly {\n tempUint := mload(add(add(_bytes, 0x20), _start))\n }\n\n return tempUint;\n }\n\n function toBytes32(bytes memory _bytes, uint _start) internal pure returns (bytes32) {\n require(_bytes.length >= (_start + 32));\n bytes32 tempBytes32;\n\n assembly {\n tempBytes32 := mload(add(add(_bytes, 0x20), _start))\n }\n\n return tempBytes32;\n }\n\n function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) {\n bool success = true;\n\n assembly {\n let length := mload(_preBytes)\n\n // if lengths don't match the arrays are not equal\n switch eq(length, mload(_postBytes))\n case 1 {\n // cb is a circuit breaker in the for loop since there's\n // no said feature for inline assembly loops\n // cb = 1 - don't breaker\n // cb = 0 - break\n let cb := 1\n\n let mc := add(_preBytes, 0x20)\n let end := add(mc, length)\n\n for {\n let cc := add(_postBytes, 0x20)\n // the next line is the loop condition:\n // while(uint(mc < end) + cb == 2)\n } eq(add(lt(mc, end), cb), 2) {\n mc := add(mc, 0x20)\n cc := add(cc, 0x20)\n } {\n // if any of these checks fails then arrays are not equal\n if iszero(eq(mload(mc), mload(cc))) {\n // unsuccess:\n success := 0\n cb := 0\n }\n }\n }\n default {\n // unsuccess:\n success := 0\n }\n }\n\n return success;\n }\n\n function equalStorage(\n bytes storage _preBytes,\n bytes memory _postBytes\n )\n internal\n view\n returns (bool)\n {\n bool success = true;\n\n assembly {\n // we know _preBytes_offset is 0\n let fslot := sload(_preBytes_slot)\n // Decode the length of the stored array like in concatStorage().\n let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)\n let mlength := mload(_postBytes)\n\n // if lengths don't match the arrays are not equal\n switch eq(slength, mlength)\n case 1 {\n // slength can contain both the length and contents of the array\n // if length < 32 bytes so let's prepare for that\n // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage\n if iszero(iszero(slength)) {\n switch lt(slength, 32)\n case 1 {\n // blank the last byte which is the length\n fslot := mul(div(fslot, 0x100), 0x100)\n\n if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {\n // unsuccess:\n success := 0\n }\n }\n default {\n // cb is a circuit breaker in the for loop since there's\n // no said feature for inline assembly loops\n // cb = 1 - don't breaker\n // cb = 0 - break\n let cb := 1\n\n // get the keccak hash to get the contents of the array\n mstore(0x0, _preBytes_slot)\n let sc := keccak256(0x0, 0x20)\n\n let mc := add(_postBytes, 0x20)\n let end := add(mc, mlength)\n\n // the next line is the loop condition:\n // while(uint(mc < end) + cb == 2)\n for {} eq(add(lt(mc, end), cb), 2) {\n sc := add(sc, 1)\n mc := add(mc, 0x20)\n } {\n if iszero(eq(sload(sc), mload(mc))) {\n // unsuccess:\n success := 0\n cb := 0\n }\n }\n }\n }\n }\n default {\n // unsuccess:\n success := 0\n }\n }\n\n return success;\n }\n}\n", "sourcePath": "solidity-bytes-utils/contracts/BytesLib.sol", "ast": { "absolutePath": "solidity-bytes-utils/contracts/BytesLib.sol", "exportedSymbols": { "BytesLib": [ 4618 ] }, "id": 4619, "nodeType": "SourceUnit", "nodes": [ { "id": 4296, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "299:23:16" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": null, "fullyImplemented": true, "id": 4618, "linearizedBaseContracts": [ 4618 ], "name": "BytesLib", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 4311, "nodeType": "Block", "src": "500:2804:16", "statements": [ { "assignments": [ 4306 ], "declarations": [ { "constant": false, "id": 4306, "name": "tempBytes", "nodeType": "VariableDeclaration", "scope": 4311, "src": "510:22:16", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4305, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "510:5:16", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 4307, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "510:22:16" }, { "externalReferences": [ { "tempBytes": { "declaration": 4306, "isOffset": false, "isSlot": false, "src": "696:9:16", "valueSize": 1 } }, { "_preBytes": { "declaration": 4298, "isOffset": false, "isSlot": false, "src": "872:9:16", "valueSize": 1 } }, { "tempBytes": { "declaration": 4306, "isOffset": false, "isSlot": false, "src": "1144:9:16", "valueSize": 1 } }, { "tempBytes": { "declaration": 4306, "isOffset": false, "isSlot": false, "src": "902:9:16", "valueSize": 1 } }, { "_preBytes": { "declaration": 4298, "isOffset": false, "isSlot": false, "src": "1487:9:16", "valueSize": 1 } }, { "_postBytes": { "declaration": 4300, "isOffset": false, "isSlot": false, "src": "2485:10:16", "valueSize": 1 } }, { "_postBytes": { "declaration": 4300, "isOffset": false, "isSlot": false, "src": "2067:10:16", "valueSize": 1 } }, { "tempBytes": { "declaration": 4306, "isOffset": false, "isSlot": false, "src": "2098:9:16", "valueSize": 1 } }, { "tempBytes": { "declaration": 4306, "isOffset": false, "isSlot": false, "src": "2127:9:16", "valueSize": 1 } }, { "_preBytes": { "declaration": 4298, "isOffset": false, "isSlot": false, "src": "3166:9:16", "valueSize": 1 } } ], "id": 4308, "nodeType": "InlineAssembly", "operations": "{\n tempBytes := mload(0x40)\n let length := mload(_preBytes)\n mstore(tempBytes, length)\n let mc := add(tempBytes, 0x20)\n let end := add(mc, length)\n for {\n let cc := add(_preBytes, 0x20)\n }\n lt(mc, end)\n {\n mc := add(mc, 0x20)\n cc := add(cc, 0x20)\n }\n {\n mstore(mc, mload(cc))\n }\n length := mload(_postBytes)\n mstore(tempBytes, add(length, mload(tempBytes)))\n mc := end\n end := add(mc, length)\n for {\n let cc := add(_postBytes, 0x20)\n }\n lt(mc, end)\n {\n mc := add(mc, 0x20)\n cc := add(cc, 0x20)\n }\n {\n mstore(mc, mload(cc))\n }\n mstore(0x40, and(add(add(end, iszero(add(length, mload(_preBytes)))), 31), not(31)))\n}", "src": "543:2728:16" }, { "expression": { "argumentTypes": null, "id": 4309, "name": "tempBytes", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4306, "src": "3288:9:16", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "functionReturnParameters": 4304, "id": 4310, "nodeType": "Return", "src": "3281:16:16" } ] }, "documentation": null, "id": 4312, "implemented": true, "kind": "function", "modifiers": [], "name": "concat", "nodeType": "FunctionDefinition", "parameters": { "id": 4301, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4298, "name": "_preBytes", "nodeType": "VariableDeclaration", "scope": 4312, "src": "373:22:16", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4297, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "373:5:16", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 4300, "name": "_postBytes", "nodeType": "VariableDeclaration", "scope": 4312, "src": "405:23:16", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4299, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "405:5:16", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "363:71:16" }, "returnParameters": { "id": 4304, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4303, "name": "", "nodeType": "VariableDeclaration", "scope": 4312, "src": "482:12:16", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4302, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "482:5:16", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "481:14:16" }, "scope": 4618, "src": "348:2956:16", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 4320, "nodeType": "Block", "src": "3392:6032:16", "statements": [ { "externalReferences": [ { "_preBytes_slot": { "declaration": 4314, "isOffset": false, "isSlot": true, "src": "3653:14:16", "valueSize": 1 } }, { "_postBytes": { "declaration": 4316, "isOffset": false, "isSlot": false, "src": "4271:10:16", "valueSize": 1 } }, { "_preBytes_slot": { "declaration": 4314, "isOffset": false, "isSlot": true, "src": "4947:14:16", "valueSize": 1 } }, { "_postBytes": { "declaration": 4316, "isOffset": false, "isSlot": false, "src": "7272:10:16", "valueSize": 1 } }, { "_preBytes_slot": { "declaration": 4314, "isOffset": false, "isSlot": true, "src": "6385:14:16", "valueSize": 1 } }, { "_postBytes": { "declaration": 4316, "isOffset": false, "isSlot": false, "src": "7221:10:16", "valueSize": 1 } }, { "_postBytes": { "declaration": 4316, "isOffset": false, "isSlot": false, "src": "5477:10:16", "valueSize": 1 } }, { "_preBytes_slot": { "declaration": 4314, "isOffset": false, "isSlot": true, "src": "6530:14:16", "valueSize": 1 } }, { "_preBytes_slot": { "declaration": 4314, "isOffset": false, "isSlot": true, "src": "8229:14:16", "valueSize": 1 } }, { "_preBytes_slot": { "declaration": 4314, "isOffset": false, "isSlot": true, "src": "8450:14:16", "valueSize": 1 } }, { "_postBytes": { "declaration": 4316, "isOffset": false, "isSlot": false, "src": "8785:10:16", "valueSize": 1 } }, { "_postBytes": { "declaration": 4316, "isOffset": false, "isSlot": false, "src": "8836:10:16", "valueSize": 1 } } ], "id": 4319, "nodeType": "InlineAssembly", "operations": "{\n let fslot := sload(_preBytes_slot)\n let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)\n let mlength := mload(_postBytes)\n let newlength := add(slength, mlength)\n switch add(lt(slength, 32), lt(newlength, 32))\n case 2 {\n sstore(_preBytes_slot, add(fslot, add(mul(div(mload(add(_postBytes, 0x20)), exp(0x100, sub(32, mlength))), exp(0x100, sub(32, newlength))), mul(mlength, 2))))\n }\n case 1 {\n mstore(0x0, _preBytes_slot)\n let sc := add(keccak256(0x0, 0x20), div(slength, 32))\n sstore(_preBytes_slot, add(mul(newlength, 2), 1))\n let submod := sub(32, slength)\n let mc := add(_postBytes, submod)\n let end := add(_postBytes, mlength)\n let mask := sub(exp(0x100, submod), 1)\n sstore(sc, add(and(fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00), and(mload(mc), mask)))\n for {\n mc := add(mc, 0x20)\n sc := add(sc, 1)\n }\n lt(mc, end)\n {\n sc := add(sc, 1)\n mc := add(mc, 0x20)\n }\n {\n sstore(sc, mload(mc))\n }\n mask := exp(0x100, sub(mc, end))\n sstore(sc, mul(div(mload(mc), mask), mask))\n }\n default {\n mstore(0x0, _preBytes_slot)\n let sc := add(keccak256(0x0, 0x20), div(slength, 32))\n sstore(_preBytes_slot, add(mul(newlength, 2), 1))\n let slengthmod := mod(slength, 32)\n let mlengthmod := mod(mlength, 32)\n let submod := sub(32, slengthmod)\n let mc := add(_postBytes, submod)\n let end := add(_postBytes, mlength)\n let mask := sub(exp(0x100, submod), 1)\n sstore(sc, add(sload(sc), and(mload(mc), mask)))\n for {\n sc := add(sc, 1)\n mc := add(mc, 0x20)\n }\n lt(mc, end)\n {\n sc := add(sc, 1)\n mc := add(mc, 0x20)\n }\n {\n sstore(sc, mload(mc))\n }\n mask := exp(0x100, sub(mc, end))\n sstore(sc, mul(div(mload(mc), mask), mask))\n }\n}", "src": "3402:6016:16" } ] }, "documentation": null, "id": 4321, "implemented": true, "kind": "function", "modifiers": [], "name": "concatStorage", "nodeType": "FunctionDefinition", "parameters": { "id": 4317, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4314, "name": "_preBytes", "nodeType": "VariableDeclaration", "scope": 4321, "src": "3333:23:16", "stateVariable": false, "storageLocation": "storage", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" }, "typeName": { "id": 4313, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "3333:5:16", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 4316, "name": "_postBytes", "nodeType": "VariableDeclaration", "scope": 4321, "src": "3358:23:16", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": 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"nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 4336, "name": "_length", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4327, "src": "9633:7:16", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9624:16:16", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 4338, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "9623:18:16", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9606:35:16", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 4332, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4699, 4700 ], "referencedDeclaration": 4699, "src": 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false, "isSlot": false, "src": "11833:9:16", "valueSize": 1 } }, { "tempBytes": { "declaration": 4343, "isOffset": false, "isSlot": false, "src": "11491:9:16", "valueSize": 1 } }, { "_length": { "declaration": 4327, "isOffset": false, "isSlot": false, "src": "11502:7:16", "valueSize": 1 } }, { "tempBytes": { "declaration": 4343, "isOffset": false, "isSlot": false, "src": "11892:9:16", "valueSize": 1 } } ], "id": 4345, "nodeType": "InlineAssembly", "operations": "{\n switch iszero(_length)\n case 0 {\n tempBytes := mload(0x40)\n let lengthmod := and(_length, 31)\n let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))\n let end := add(mc, _length)\n for {\n let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)\n }\n lt(mc, end)\n {\n mc := add(mc, 0x20)\n cc := add(cc, 0x20)\n }\n {\n mstore(mc, mload(cc))\n }\n mstore(tempBytes, _length)\n mstore(0x40, and(add(mc, 31), not(31)))\n }\n default {\n tempBytes := mload(0x40)\n mstore(0x40, add(tempBytes, 0x20))\n }\n}", "src": "9686:2247:16" }, { "expression": { "argumentTypes": null, "id": 4346, "name": "tempBytes", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4343, "src": "11950:9:16", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "functionReturnParameters": 4331, "id": 4347, "nodeType": "Return", "src": "11943:16:16" } ] }, "documentation": null, "id": 4349, "implemented": true, "kind": "function", "modifiers": [], "name": "slice", "nodeType": "FunctionDefinition", "parameters": { "id": 4328, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4323, "name": "_bytes", "nodeType": "VariableDeclaration", "scope": 4349, "src": "9454:19:16", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4322, "name": "bytes", "nodeType": "ElementaryTypeName", "src": 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1 } }, { "_postBytes": { "declaration": 4316, "isOffset": false, "isSlot": false, "src": "8785:10:16", "valueSize": 1 } }, { "_postBytes": { "declaration": 4316, "isOffset": false, "isSlot": false, "src": "8836:10:16", "valueSize": 1 } } ], "id": 4319, "nodeType": "InlineAssembly", "operations": "{\n let fslot := sload(_preBytes_slot)\n let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)\n let mlength := mload(_postBytes)\n let newlength := add(slength, mlength)\n switch add(lt(slength, 32), lt(newlength, 32))\n case 2 {\n sstore(_preBytes_slot, add(fslot, add(mul(div(mload(add(_postBytes, 0x20)), exp(0x100, sub(32, mlength))), exp(0x100, sub(32, newlength))), mul(mlength, 2))))\n }\n case 1 {\n mstore(0x0, _preBytes_slot)\n let sc := add(keccak256(0x0, 0x20), div(slength, 32))\n sstore(_preBytes_slot, add(mul(newlength, 2), 1))\n let submod := sub(32, slength)\n let mc := add(_postBytes, submod)\n let end := add(_postBytes, mlength)\n let mask := sub(exp(0x100, submod), 1)\n sstore(sc, add(and(fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00), and(mload(mc), mask)))\n for {\n mc := add(mc, 0x20)\n sc := add(sc, 1)\n }\n lt(mc, end)\n {\n sc := add(sc, 1)\n mc := add(mc, 0x20)\n }\n {\n sstore(sc, mload(mc))\n }\n mask := exp(0x100, sub(mc, end))\n sstore(sc, mul(div(mload(mc), mask), mask))\n }\n default {\n mstore(0x0, _preBytes_slot)\n let sc := add(keccak256(0x0, 0x20), div(slength, 32))\n sstore(_preBytes_slot, add(mul(newlength, 2), 1))\n let slengthmod := mod(slength, 32)\n let mlengthmod := mod(mlength, 32)\n let submod := sub(32, slengthmod)\n let mc := add(_postBytes, submod)\n let end := add(_postBytes, mlength)\n let mask := sub(exp(0x100, submod), 1)\n sstore(sc, add(sload(sc), and(mload(mc), mask)))\n for {\n sc := add(sc, 1)\n mc := add(mc, 0x20)\n }\n lt(mc, end)\n {\n sc := add(sc, 1)\n mc := add(mc, 0x20)\n }\n {\n sstore(sc, mload(mc))\n }\n mask := exp(0x100, sub(mc, end))\n sstore(sc, mul(div(mload(mc), mask), mask))\n }\n}", "src": "3402:6016:16" } ] }, "documentation": null, "id": 4321, "implemented": true, "kind": "function", "modifiers": [], "name": "concatStorage", "nodeType": "FunctionDefinition", "parameters": { "id": 4317, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4314, "name": "_preBytes", "nodeType": "VariableDeclaration", "scope": 4321, "src": "3333:23:16", "stateVariable": false, "storageLocation": "storage", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" }, "typeName": { "id": 4313, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "3333:5:16", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 4316, "name": "_postBytes", "nodeType": "VariableDeclaration", "scope": 4321, "src": "3358:23:16", "stateVariable": false, "storageLocation": "memory", 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and(add(mc, 31), not(31)))\n }\n default {\n tempBytes := mload(0x40)\n mstore(0x40, add(tempBytes, 0x20))\n }\n}", "src": "9686:2247:16" }, { "expression": { "argumentTypes": null, "id": 4346, "name": "tempBytes", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4343, "src": "11950:9:16", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "functionReturnParameters": 4331, "id": 4347, "nodeType": "Return", "src": "11943:16:16" } ] }, "documentation": null, "id": 4349, "implemented": true, "kind": "function", "modifiers": [], "name": "slice", "nodeType": "FunctionDefinition", "parameters": { "id": 4328, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4323, "name": "_bytes", "nodeType": "VariableDeclaration", "scope": 4349, "src": "9454:19:16", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, 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"typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 4363, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 4361, "name": "_start", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4353, "src": "12094:6:16", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "hexValue": "3230", "id": 4362, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12103:2:16", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_20_by_1", "typeString": "int_const 20" }, "value": "20" }, "src": "12094:11:16", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 4364, "isConstant": false, "isInlineArray": false, "isLValue": 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