Method copyArrayToStorageFunction

libsolidity/codegen/YulUtilFunctions.cpp:1966–2060

}

std::string YulUtilFunctions::copyArrayToStorageFunction(ArrayType const& _fromType, ArrayType const& _toType)
{
	solAssert(
		(*_fromType.copyForLocation(_toType.location(), _toType.isPointer())).equals(dynamic_cast<ReferenceType const&>(_toType)),
		""
	);
	if (!_toType.isDynamicallySized())
		solAssert(!_fromType.isDynamicallySized() && _fromType.length() <= _toType.length(), "");

	if (_fromType.isByteArrayOrString())
		return copyByteArrayToStorageFunction(_fromType, _toType);
	if (_toType.baseType()->isValueType())
		return copyValueArrayToStorageFunction(_fromType, _toType);

	solAssert(_toType.storageStride() == 32);
	solAssert(!_fromType.baseType()->isValueType());

	std::string functionName = "copy_array_to_storage_from_" + _fromType.identifier() + "_to_" + _toType.identifier();
	return m_functionCollector.createFunction(functionName, [&](){
		Whiskers templ(R"(
			function <functionName>(slot, value<?isFromDynamicCalldata>, len</isFromDynamicCalldata>) {
				<?fromStorage> if eq(slot, value) { leave } </fromStorage>
				let length := <arrayLength>(value<?isFromDynamicCalldata>, len</isFromDynamicCalldata>)

				<resizeArray>(slot, length)

				let srcPtr := <srcDataLocation>(value)

				let elementSlot := <dstDataLocation>(slot)

				for { let i := 0 } lt(i, length) {i := add(i, 1)} {
					<?fromCalldata>
						let <stackItems> :=
						<?dynamicallyEncodedBase>
							<accessCalldataTail>(value, srcPtr)
						<!dynamicallyEncodedBase>
							srcPtr
						</dynamicallyEncodedBase>
					</fromCalldata>

					<?fromMemory>
						let <stackItems> := <readFromMemoryOrCalldata>(srcPtr)
					</fromMemory>

					<?fromStorage>
						let <stackItems> := srcPtr
					</fromStorage>

					<updateStorageValue>(elementSlot, <stackItems>)

					srcPtr := add(srcPtr, <srcStride>)

					elementSlot := add(elementSlot, <storageSize>)
				}
			}
		)");
		if (_fromType.dataStoredIn(DataLocation::Storage))
			solAssert(!_fromType.isValueType(), "");