| // Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'dart:math' as math; |
| |
| import 'package:kernel/ast.dart'; |
| |
| import 'abi.dart'; |
| import 'common.dart'; |
| |
| /// AST node wrapper for native types. |
| /// |
| /// This algebraic data structure does not stand on its own but refers |
| /// intimately to AST nodes such as [Class]. |
| abstract class NativeTypeCfe { |
| factory NativeTypeCfe(FfiTransformer transformer, DartType dartType, |
| {List<int>? arrayDimensions, |
| Map<Class, NativeTypeCfe> compoundCache = const {}, |
| alreadyInAbiSpecificType = false}) { |
| if (transformer.isPrimitiveType(dartType)) { |
| final clazz = (dartType as InterfaceType).classNode; |
| final nativeType = transformer.getType(clazz)!; |
| return PrimitiveNativeTypeCfe(nativeType, clazz); |
| } |
| if (transformer.isPointerType(dartType)) { |
| return PointerNativeTypeCfe(); |
| } |
| if (transformer.isCompoundSubtype(dartType)) { |
| final clazz = (dartType as InterfaceType).classNode; |
| if (compoundCache.containsKey(clazz)) { |
| return compoundCache[clazz]!; |
| } else { |
| throw "Class '$clazz' not found in compoundCache."; |
| } |
| } |
| if (transformer.isArrayType(dartType)) { |
| if (arrayDimensions == null) { |
| throw "Must have array dimensions for ArrayType."; |
| } |
| if (arrayDimensions.length == 0) { |
| throw "Must have a size for this array dimension."; |
| } |
| final elementType = transformer.arraySingleElementType(dartType); |
| final elementCfeType = |
| NativeTypeCfe(transformer, elementType, compoundCache: compoundCache); |
| if (elementCfeType is InvalidNativeTypeCfe) { |
| return elementCfeType; |
| } |
| return ArrayNativeTypeCfe.multi(elementCfeType, arrayDimensions); |
| } |
| if (transformer.isAbiSpecificIntegerSubtype(dartType)) { |
| final clazz = (dartType as InterfaceType).classNode; |
| final mappingConstants = |
| transformer.getAbiSpecificIntegerMappingAnnotations(clazz); |
| if (alreadyInAbiSpecificType || mappingConstants.length != 1) { |
| // Unsupported mapping. |
| return AbiSpecificNativeTypeCfe({}, clazz); |
| } |
| final mapping = |
| Map.fromEntries(mappingConstants.first.entries.map((e) => MapEntry( |
| transformer.constantAbis[e.key]!, |
| NativeTypeCfe( |
| transformer, |
| (e.value as InstanceConstant).classNode.getThisType( |
| transformer.coreTypes, Nullability.nonNullable), |
| alreadyInAbiSpecificType: true, |
| )))); |
| for (final value in mapping.values) { |
| if (value is! PrimitiveNativeTypeCfe || |
| !nativeIntTypesFixedSize.contains(value.nativeType)) { |
| // Unsupported mapping. |
| return AbiSpecificNativeTypeCfe({}, clazz); |
| } |
| } |
| return AbiSpecificNativeTypeCfe(mapping, clazz); |
| } |
| throw "Invalid type $dartType"; |
| } |
| |
| /// The size in bytes per [Abi]. |
| Map<Abi, int?> get size; |
| |
| /// The size in bytes for [Abi]. |
| int? getSizeFor(Abi abi); |
| |
| /// The alignment inside structs in bytes per [Abi]. |
| /// |
| /// This is not the alignment on stack, this is only calculated in the VM. |
| Map<Abi, int?> get alignment; |
| |
| /// The alignment inside structs in bytes for [Abi]. |
| /// |
| /// This is not the alignment on stack, this is only calculated in the VM. |
| int? getAlignmentFor(Abi abi); |
| |
| /// Generates a Constant representing the type which is consumed by the VM. |
| /// |
| /// Takes [transformer] to be able to lookup classes and methods. |
| /// |
| /// See runtime/vm/compiler/ffi/native_type.cc:NativeType::FromAbstractType. |
| Constant generateConstant(FfiTransformer transformer); |
| |
| /// Generates the return statement for a compound field getter with this type. |
| /// |
| /// Takes [transformer] to be able to lookup classes and methods. |
| ReturnStatement generateGetterStatement(DartType dartType, int fileOffset, |
| Map<Abi, int?> offsets, bool unalignedAccess, FfiTransformer transformer); |
| |
| /// Generates the return statement for a compound field setter with this type. |
| /// |
| /// Takes [transformer] to be able to lookup classes and methods. |
| ReturnStatement generateSetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| VariableDeclaration argument, |
| FfiTransformer transformer); |
| } |
| |
| class InvalidNativeTypeCfe implements NativeTypeCfe { |
| final String reason; |
| |
| InvalidNativeTypeCfe(this.reason); |
| |
| @override |
| Map<Abi, int?> get alignment => throw reason; |
| |
| @override |
| int? getAlignmentFor(Abi abi) => throw reason; |
| |
| @override |
| Constant generateConstant(FfiTransformer transformer) => throw reason; |
| |
| @override |
| ReturnStatement generateGetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| FfiTransformer transformer) => |
| throw reason; |
| |
| @override |
| ReturnStatement generateSetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| VariableDeclaration argument, |
| FfiTransformer transformer) => |
| throw reason; |
| |
| @override |
| Map<Abi, int?> get size => throw reason; |
| |
| @override |
| int? getSizeFor(Abi abi) => throw reason; |
| } |
| |
| class PrimitiveNativeTypeCfe implements NativeTypeCfe { |
| final NativeType nativeType; |
| |
| final Class clazz; |
| |
| PrimitiveNativeTypeCfe(this.nativeType, this.clazz); |
| |
| @override |
| Map<Abi, int?> get size { |
| final int size = nativeTypeSizes[nativeType]!; |
| if (size == WORD_SIZE) { |
| return wordSize; |
| } |
| return {for (var abi in Abi.values) abi: size}; |
| } |
| |
| @override |
| int? getSizeFor(Abi abi) { |
| final int size = nativeTypeSizes[nativeType]!; |
| if (size == WORD_SIZE) { |
| return wordSize[abi]; |
| } |
| return size; |
| } |
| |
| @override |
| Map<Abi, int> get alignment => { |
| for (var abi in Abi.values) |
| abi: nonSizeAlignment[abi]![nativeType] ?? getSizeFor(abi)! |
| }; |
| |
| @override |
| int? getAlignmentFor(Abi abi) => |
| nonSizeAlignment[abi]![nativeType] ?? getSizeFor(abi)!; |
| |
| @override |
| Constant generateConstant(FfiTransformer transformer) => |
| TypeLiteralConstant(InterfaceType(clazz, Nullability.nonNullable)); |
| |
| bool get isFloat => |
| nativeType == NativeType.kFloat || nativeType == NativeType.kDouble; |
| |
| bool isUnaligned(Map<Abi, int?> offsets) { |
| final alignments = alignment; |
| for (final abi in offsets.keys) { |
| final offset = offsets[abi]!; |
| final alignment = alignments[abi]!; |
| if (offset % alignment != 0) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /// Sample output for `int get x =>`: |
| /// |
| /// ``` |
| /// _loadInt8(_typedDataBase, offset); |
| /// ``` |
| @override |
| ReturnStatement generateGetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| FfiTransformer transformer) => |
| ReturnStatement(StaticInvocation( |
| (unalignedAccess && isFloat |
| ? transformer.loadUnalignedMethods |
| : transformer.loadMethods)[nativeType]!, |
| Arguments([ |
| transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| transformer.runtimeBranchOnLayout(offsets) |
| ])) |
| ..fileOffset = fileOffset); |
| |
| /// Sample output for `set x(int #v) =>`: |
| /// |
| /// ``` |
| /// _storeInt8(_typedDataBase, offset, #v); |
| /// ``` |
| @override |
| ReturnStatement generateSetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| VariableDeclaration argument, |
| FfiTransformer transformer) => |
| ReturnStatement(StaticInvocation( |
| (unalignedAccess && isFloat |
| ? transformer.storeUnalignedMethods |
| : transformer.storeMethods)[nativeType]!, |
| Arguments([ |
| transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| transformer.runtimeBranchOnLayout(offsets), |
| VariableGet(argument) |
| ])) |
| ..fileOffset = fileOffset); |
| } |
| |
| class PointerNativeTypeCfe implements NativeTypeCfe { |
| @override |
| Map<Abi, int?> get size => wordSize; |
| |
| @override |
| int? getSizeFor(Abi abi) => wordSize[abi]; |
| |
| @override |
| Map<Abi, int?> get alignment => wordSize; |
| |
| @override |
| int? getAlignmentFor(Abi abi) => wordSize[abi]; |
| |
| @override |
| Constant generateConstant(FfiTransformer transformer) => TypeLiteralConstant( |
| InterfaceType(transformer.pointerClass, Nullability.nonNullable, [ |
| InterfaceType( |
| transformer.pointerClass.superclass!, Nullability.nonNullable) |
| ])); |
| |
| /// Sample output for `Pointer<Int8> get x =>`: |
| /// |
| /// ``` |
| /// _fromAddress<Int8>(_loadAbiSpecificInt<IntPtr>(_typedDataBase, offset)); |
| /// ``` |
| @override |
| ReturnStatement generateGetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| FfiTransformer transformer) => |
| ReturnStatement(StaticInvocation( |
| transformer.fromAddressInternal, |
| Arguments([ |
| transformer.abiSpecificLoadOrStoreExpression( |
| transformer.intptrNativeTypeCfe, |
| typedDataBase: transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| offsetInBytes: transformer.runtimeBranchOnLayout(offsets), |
| fileOffset: fileOffset, |
| ), |
| ], types: [ |
| (dartType as InterfaceType).typeArguments.single |
| ])) |
| ..fileOffset = fileOffset); |
| |
| /// Sample output for `set x(Pointer<Int8> #v) =>`: |
| /// |
| /// ``` |
| /// _storeAbiSpecificInt<IntPtr>( |
| /// _typedDataBase, |
| /// offset, |
| /// (#v as Pointer<Int8>).address, |
| /// ); |
| /// ``` |
| @override |
| ReturnStatement generateSetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| VariableDeclaration argument, |
| FfiTransformer transformer) => |
| ReturnStatement( |
| transformer.abiSpecificLoadOrStoreExpression( |
| transformer.intptrNativeTypeCfe, |
| typedDataBase: transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| offsetInBytes: transformer.runtimeBranchOnLayout(offsets), |
| value: InstanceGet( |
| InstanceAccessKind.Instance, |
| VariableGet(argument), |
| transformer.addressGetter.name, |
| interfaceTarget: transformer.addressGetter, |
| resultType: transformer.addressGetter.getterType, |
| )..fileOffset = fileOffset, |
| fileOffset: fileOffset, |
| ), |
| ); |
| } |
| |
| /// The layout of a `Struct` or `Union` in one [Abi]. |
| class CompoundLayout { |
| /// Size of the entire struct or union. |
| final int? size; |
| |
| /// Alignment of struct or union when nested in a struct. |
| final int? alignment; |
| |
| /// Offset in bytes for each field, indexed by field number. |
| /// |
| /// Always 0 for unions. |
| final List<int?> offsets; |
| |
| CompoundLayout(this.size, this.alignment, this.offsets); |
| } |
| |
| abstract class CompoundNativeTypeCfe implements NativeTypeCfe { |
| final Class clazz; |
| |
| final List<NativeTypeCfe> members; |
| |
| final Map<Abi, CompoundLayout> layout; |
| |
| CompoundNativeTypeCfe._(this.clazz, this.members, this.layout); |
| |
| @override |
| Map<Abi, int?> get size => |
| layout.map((abi, layout) => MapEntry(abi, layout.size)); |
| |
| @override |
| int? getSizeFor(Abi abi) => layout[abi]?.size; |
| |
| @override |
| Map<Abi, int?> get alignment => |
| layout.map((abi, layout) => MapEntry(abi, layout.alignment)); |
| |
| @override |
| int? getAlignmentFor(Abi abi) => layout[abi]?.alignment; |
| |
| @override |
| Constant generateConstant(FfiTransformer transformer) => |
| TypeLiteralConstant(InterfaceType(clazz, Nullability.nonNullable)); |
| |
| /// Sample output for `MyStruct get x =>`: |
| /// |
| /// ``` |
| /// MyStruct.#fromTypedDataBase( |
| /// typedDataBaseOffset(_typedDataBase, offset, size, dartType) |
| /// ); |
| /// ``` |
| @override |
| ReturnStatement generateGetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| FfiTransformer transformer) { |
| final constructor = clazz.constructors |
| .firstWhere((c) => c.name == Name("#fromTypedDataBase")); |
| |
| return ReturnStatement(ConstructorInvocation( |
| constructor, |
| Arguments([ |
| transformer.typedDataBaseOffset( |
| transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| transformer.runtimeBranchOnLayout(offsets), |
| transformer.runtimeBranchOnLayout(size), |
| dartType, |
| fileOffset) |
| ])) |
| ..fileOffset = fileOffset); |
| } |
| |
| /// Sample output for `set x(MyStruct #v) =>`: |
| /// |
| /// ``` |
| /// _memCopy(_typedDataBase, offset, #v._typedDataBase, 0, size); |
| /// ``` |
| @override |
| ReturnStatement generateSetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| VariableDeclaration argument, |
| FfiTransformer transformer) => |
| ReturnStatement(StaticInvocation( |
| transformer.memCopy, |
| Arguments([ |
| transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| transformer.runtimeBranchOnLayout(offsets), |
| transformer.getCompoundTypedDataBaseField( |
| VariableGet(argument), fileOffset), |
| ConstantExpression(IntConstant(0)), |
| transformer.runtimeBranchOnLayout(size), |
| ])) |
| ..fileOffset = fileOffset); |
| } |
| |
| class StructNativeTypeCfe extends CompoundNativeTypeCfe { |
| // Nullable int. |
| final int? packing; |
| |
| factory StructNativeTypeCfe(Class clazz, List<NativeTypeCfe> members, |
| {int? packing}) { |
| final layout = { |
| for (var abi in Abi.values) abi: _calculateLayout(members, packing, abi) |
| }; |
| return StructNativeTypeCfe._(clazz, members, packing, layout); |
| } |
| |
| StructNativeTypeCfe._(Class clazz, List<NativeTypeCfe> members, this.packing, |
| Map<Abi, CompoundLayout> layout) |
| : super._(clazz, members, layout); |
| |
| // Keep consistent with runtime/vm/compiler/ffi/native_type.cc |
| // NativeStructType::FromNativeTypes. |
| static CompoundLayout _calculateLayout( |
| List<NativeTypeCfe> types, int? packing, Abi abi) { |
| int? offset = 0; |
| final offsets = <int?>[]; |
| int? structAlignment = 1; |
| for (int i = 0; i < types.length; i++) { |
| final int? size = types[i].getSizeFor(abi); |
| int? alignment = types[i].getAlignmentFor(abi); |
| if (packing != null) { |
| alignment = min(packing, alignment); |
| } |
| if (alignment != null && alignment > 0) { |
| offset = offset.align(alignment); |
| } |
| offsets.add(offset); |
| offset += size; |
| structAlignment = max(structAlignment, alignment); |
| } |
| final int? size = offset.align(structAlignment); |
| return CompoundLayout(size, structAlignment, offsets); |
| } |
| } |
| |
| class UnionNativeTypeCfe extends CompoundNativeTypeCfe { |
| factory UnionNativeTypeCfe(Class clazz, List<NativeTypeCfe> members) { |
| final layout = { |
| for (var abi in Abi.values) abi: _calculateLayout(members, abi) |
| }; |
| return UnionNativeTypeCfe._(clazz, members, layout); |
| } |
| |
| UnionNativeTypeCfe._( |
| Class clazz, List<NativeTypeCfe> members, Map<Abi, CompoundLayout> layout) |
| : super._(clazz, members, layout); |
| |
| // Keep consistent with runtime/vm/compiler/ffi/native_type.cc |
| // NativeUnionType::FromNativeTypes. |
| static CompoundLayout _calculateLayout(List<NativeTypeCfe> types, Abi abi) { |
| int? unionSize = 1; |
| int? unionAlignment = 1; |
| for (int i = 0; i < types.length; i++) { |
| final int? size = types[i].getSizeFor(abi); |
| int? alignment = types[i].getAlignmentFor(abi); |
| unionSize = max(unionSize, size); |
| unionAlignment = max(unionAlignment, alignment); |
| } |
| final int? size = unionSize.align(unionAlignment); |
| return CompoundLayout(size, unionAlignment, List.filled(types.length, 0)); |
| } |
| } |
| |
| class ArrayNativeTypeCfe implements NativeTypeCfe { |
| final NativeTypeCfe elementType; |
| final int length; |
| |
| ArrayNativeTypeCfe(this.elementType, this.length); |
| |
| factory ArrayNativeTypeCfe.multi( |
| NativeTypeCfe elementType, List<int> dimensions) { |
| if (dimensions.length == 1) { |
| return ArrayNativeTypeCfe(elementType, dimensions.single); |
| } |
| return ArrayNativeTypeCfe( |
| ArrayNativeTypeCfe.multi(elementType, dimensions.sublist(1)), |
| dimensions.first); |
| } |
| |
| List<int> get dimensions { |
| final elementType = this.elementType; |
| if (elementType is ArrayNativeTypeCfe) { |
| return [length, ...elementType.dimensions]; |
| } |
| return [length]; |
| } |
| |
| List<int> get nestedDimensions => dimensions.sublist(1); |
| |
| int get dimensionsFlattened => |
| dimensions.fold(1, (accumulator, element) => accumulator * element); |
| |
| NativeTypeCfe get singleElementType { |
| final elementType = this.elementType; |
| if (elementType is ArrayNativeTypeCfe) { |
| return elementType.singleElementType; |
| } |
| return elementType; |
| } |
| |
| @override |
| Map<Abi, int?> get size => |
| elementType.size.map((abi, size) => MapEntry(abi, size * length)); |
| |
| @override |
| int? getSizeFor(Abi abi) => elementType.getSizeFor(abi) * length; |
| |
| @override |
| Map<Abi, int?> get alignment => elementType.alignment; |
| |
| @override |
| int? getAlignmentFor(Abi abi) => elementType.getAlignmentFor(abi); |
| |
| // Note that we flatten multi dimensional arrays. |
| @override |
| Constant generateConstant(FfiTransformer transformer) => |
| InstanceConstant(transformer.ffiInlineArrayClass.reference, [], { |
| transformer.ffiInlineArrayElementTypeField.fieldReference: |
| singleElementType.generateConstant(transformer), |
| transformer.ffiInlineArrayLengthField.fieldReference: |
| IntConstant(dimensionsFlattened) |
| }); |
| |
| /// Sample output for `Array<Int8> get x =>`: |
| /// |
| /// ``` |
| /// Array<Int8>._( |
| /// typedDataBaseOffset(_typedDataBase, offset, size, typeArgument) |
| /// ); |
| /// ``` |
| @override |
| ReturnStatement generateGetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| FfiTransformer transformer) { |
| InterfaceType typeArgument = |
| (dartType as InterfaceType).typeArguments.single as InterfaceType; |
| return ReturnStatement(ConstructorInvocation( |
| transformer.arrayConstructor, |
| Arguments([ |
| transformer.typedDataBaseOffset( |
| transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| transformer.runtimeBranchOnLayout(offsets), |
| transformer.runtimeBranchOnLayout(size), |
| typeArgument, |
| fileOffset), |
| ConstantExpression(IntConstant(length)), |
| transformer.intListConstantExpression(nestedDimensions) |
| ], types: [ |
| typeArgument |
| ])) |
| ..fileOffset = fileOffset); |
| } |
| |
| /// Sample output for `set x(Array #v) =>`: |
| /// |
| /// ``` |
| /// _memCopy(_typedDataBase, offset, #v._typedDataBase, 0, size); |
| /// ``` |
| @override |
| ReturnStatement generateSetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| VariableDeclaration argument, |
| FfiTransformer transformer) => |
| ReturnStatement(StaticInvocation( |
| transformer.memCopy, |
| Arguments([ |
| transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| transformer.runtimeBranchOnLayout(offsets), |
| transformer.getArrayTypedDataBaseField( |
| VariableGet(argument), fileOffset), |
| ConstantExpression(IntConstant(0)), |
| transformer.runtimeBranchOnLayout(size), |
| ])) |
| ..fileOffset = fileOffset); |
| } |
| |
| class AbiSpecificNativeTypeCfe implements NativeTypeCfe { |
| final Map<Abi, NativeTypeCfe> abiSpecificTypes; |
| |
| final Class clazz; |
| |
| AbiSpecificNativeTypeCfe(this.abiSpecificTypes, this.clazz); |
| |
| @override |
| Map<Abi, int?> get size => abiSpecificTypes.map( |
| (abi, nativeTypeCfe) => MapEntry(abi, nativeTypeCfe.getSizeFor(abi))); |
| |
| @override |
| int? getSizeFor(Abi abi) => abiSpecificTypes[abi]?.getSizeFor(abi); |
| |
| @override |
| Map<Abi, int?> get alignment => abiSpecificTypes |
| .map((abi, nativeTypeCfe) => MapEntry(abi, nativeTypeCfe.alignment[abi])); |
| |
| @override |
| int? getAlignmentFor(Abi abi) => abiSpecificTypes[abi]?.getAlignmentFor(abi); |
| |
| @override |
| Constant generateConstant(FfiTransformer transformer) => |
| TypeLiteralConstant(InterfaceType(clazz, Nullability.nonNullable)); |
| |
| @override |
| ReturnStatement generateGetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| FfiTransformer transformer, |
| ) { |
| return ReturnStatement( |
| transformer.abiSpecificLoadOrStoreExpression( |
| this, |
| typedDataBase: transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| offsetInBytes: transformer.runtimeBranchOnLayout(offsets), |
| fileOffset: fileOffset, |
| ), |
| ); |
| } |
| |
| @override |
| ReturnStatement generateSetterStatement( |
| DartType dartType, |
| int fileOffset, |
| Map<Abi, int?> offsets, |
| bool unalignedAccess, |
| VariableDeclaration argument, |
| FfiTransformer transformer, |
| ) { |
| return ReturnStatement( |
| transformer.abiSpecificLoadOrStoreExpression( |
| this, |
| typedDataBase: transformer.getCompoundTypedDataBaseField( |
| ThisExpression(), fileOffset), |
| offsetInBytes: transformer.runtimeBranchOnLayout(offsets), |
| value: VariableGet(argument), |
| fileOffset: fileOffset, |
| ), |
| ); |
| } |
| } |
| |
| extension on int? { |
| int? align(int? alignment) => |
| ((this + alignment - 1) ~/ alignment) * alignment; |
| |
| int? operator *(int? other) { |
| final this_ = this; |
| if (this_ == null) { |
| return null; |
| } |
| if (other == null) { |
| return null; |
| } |
| return this_ * other; |
| } |
| |
| int? operator +(int? other) { |
| final this_ = this; |
| if (this_ == null) { |
| return null; |
| } |
| if (other == null) { |
| return null; |
| } |
| return this_ + other; |
| } |
| |
| int? operator -(int? other) { |
| final this_ = this; |
| if (this_ == null) { |
| return null; |
| } |
| if (other == null) { |
| return null; |
| } |
| return this_ - other; |
| } |
| |
| int? operator ~/(int? other) { |
| final this_ = this; |
| if (this_ == null) { |
| return null; |
| } |
| if (other == null) { |
| return null; |
| } |
| return this_ ~/ other; |
| } |
| } |
| |
| int? max(int? a, int? b) { |
| if (a == null) { |
| return null; |
| } |
| if (b == null) { |
| return null; |
| } |
| return math.max(a, b); |
| } |
| |
| int? min(int? a, int? b) { |
| if (a == null) { |
| return null; |
| } |
| if (b == null) { |
| return null; |
| } |
| return math.min(a, b); |
| } |
