| 1326 | } |
| 1327 | |
| 1328 | std::string ABIFunctions::abiDecodingFunctionStruct(StructType const& _type, bool _fromMemory) |
| 1329 | { |
| 1330 | solAssert(!_type.dataStoredIn(DataLocation::CallData), ""); |
| 1331 | std::string functionName = |
| 1332 | "abi_decode_" + |
| 1333 | _type.identifier() + |
| 1334 | (_fromMemory ? "_fromMemory" : ""); |
| 1335 | |
| 1336 | return createFunction(functionName, [&]() { |
| 1337 | Whiskers templ(R"( |
| 1338 | // <readableTypeName> |
| 1339 | function <functionName>(headStart, end) -> value { |
| 1340 | if slt(sub(end, headStart), <minimumSize>) { <revertString>() } |
| 1341 | value := <allocate>(<memorySize>) |
| 1342 | <#members> |
| 1343 | { |
| 1344 | // <memberName> |
| 1345 | <decode> |
| 1346 | } |
| 1347 | </members> |
| 1348 | } |
| 1349 | )"); |
| 1350 | // TODO add test |
| 1351 | templ("revertString", revertReasonIfDebugFunction("ABI decoding: struct data too short")); |
| 1352 | templ("functionName", functionName); |
| 1353 | templ("readableTypeName", _type.toString(true)); |
| 1354 | templ("allocate", m_utils.allocationFunction()); |
| 1355 | solAssert(_type.memoryDataSize() < u256("0xffffffffffffffff"), ""); |
| 1356 | templ("memorySize", toCompactHexWithPrefix(_type.memoryDataSize())); |
| 1357 | size_t headPos = 0; |
| 1358 | std::vector<std::map<std::string, std::string>> members; |
| 1359 | for (auto const& member: _type.members(nullptr)) |
| 1360 | { |
| 1361 | solAssert(member.type, ""); |
| 1362 | solAssert(!member.type->containsNestedMapping(), ""); |
| 1363 | auto decodingType = member.type->decodingType(); |
| 1364 | solAssert(decodingType, ""); |
| 1365 | Whiskers memberTempl(R"( |
| 1366 | <?dynamic> |
| 1367 | let offset := <load>(add(headStart, <pos>)) |
| 1368 | if gt(offset, 0xffffffffffffffff) { <revertString>() } |
| 1369 | <!dynamic> |
| 1370 | let offset := <pos> |
| 1371 | </dynamic> |
| 1372 | mstore(add(value, <memoryOffset>), <abiDecode>(add(headStart, offset), end)) |
| 1373 | )"); |
| 1374 | memberTempl("dynamic", decodingType->isDynamicallyEncoded()); |
| 1375 | // TODO add test |
| 1376 | memberTempl("revertString", revertReasonIfDebugFunction("ABI decoding: invalid struct offset")); |
| 1377 | memberTempl("load", _fromMemory ? "mload" : "calldataload"); |
| 1378 | memberTempl("pos", std::to_string(headPos)); |
| 1379 | memberTempl("memoryOffset", toCompactHexWithPrefix(_type.memoryOffsetOfMember(member.name))); |
| 1380 | memberTempl("abiDecode", abiDecodingFunction(*member.type, _fromMemory, false)); |
| 1381 | |
| 1382 | members.emplace_back(); |
| 1383 | members.back()["decode"] = memberTempl.render(); |
| 1384 | members.back()["memberName"] = member.name; |
| 1385 | headPos += decodingType->calldataHeadSize(); |
no test coverage detected