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Kotlin JVM metadata manipulation library
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/*
* Copyright 2000-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package org.jetbrains.kotlin.metadata.deserialization;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.metadata.ProtoBuf;
import org.jetbrains.kotlin.protobuf.Internal;
public class Flags {
protected Flags() {}
// Types
public static final BooleanFlagField SUSPEND_TYPE = FlagField.booleanFirst();
public static final BooleanFlagField DEFINITELY_NOT_NULL_TYPE = FlagField.booleanAfter(SUSPEND_TYPE);
// Common for declarations
public static final BooleanFlagField HAS_ANNOTATIONS = FlagField.booleanFirst();
public static final FlagField VISIBILITY = FlagField.after(HAS_ANNOTATIONS, ProtoBuf.Visibility.values());
public static final FlagField MODALITY = FlagField.after(VISIBILITY, ProtoBuf.Modality.values());
// Class
public static final FlagField CLASS_KIND = FlagField.after(MODALITY, ProtoBuf.Class.Kind.values());
public static final BooleanFlagField IS_INNER = FlagField.booleanAfter(CLASS_KIND);
public static final BooleanFlagField IS_DATA = FlagField.booleanAfter(IS_INNER);
public static final BooleanFlagField IS_EXTERNAL_CLASS = FlagField.booleanAfter(IS_DATA);
public static final BooleanFlagField IS_EXPECT_CLASS = FlagField.booleanAfter(IS_EXTERNAL_CLASS);
public static final BooleanFlagField IS_VALUE_CLASS = FlagField.booleanAfter(IS_EXPECT_CLASS);
public static final BooleanFlagField IS_FUN_INTERFACE = FlagField.booleanAfter(IS_VALUE_CLASS);
public static final BooleanFlagField HAS_ENUM_ENTRIES = FlagField.booleanAfter(IS_FUN_INTERFACE);
// Constructors
public static final BooleanFlagField IS_SECONDARY = FlagField.booleanAfter(VISIBILITY);
public static final BooleanFlagField IS_CONSTRUCTOR_WITH_NON_STABLE_PARAMETER_NAMES = FlagField.booleanAfter(IS_SECONDARY);
// Callables
public static final FlagField MEMBER_KIND = FlagField.after(MODALITY, ProtoBuf.MemberKind.values());
// Functions
public static final BooleanFlagField IS_OPERATOR = FlagField.booleanAfter(MEMBER_KIND);
public static final BooleanFlagField IS_INFIX = FlagField.booleanAfter(IS_OPERATOR);
public static final BooleanFlagField IS_INLINE = FlagField.booleanAfter(IS_INFIX);
public static final BooleanFlagField IS_TAILREC = FlagField.booleanAfter(IS_INLINE);
public static final BooleanFlagField IS_EXTERNAL_FUNCTION = FlagField.booleanAfter(IS_TAILREC);
public static final BooleanFlagField IS_SUSPEND = FlagField.booleanAfter(IS_EXTERNAL_FUNCTION);
public static final BooleanFlagField IS_EXPECT_FUNCTION = FlagField.booleanAfter(IS_SUSPEND);
public static final BooleanFlagField IS_FUNCTION_WITH_NON_STABLE_PARAMETER_NAMES = FlagField.booleanAfter(IS_EXPECT_FUNCTION);
// Properties
public static final BooleanFlagField IS_VAR = FlagField.booleanAfter(MEMBER_KIND);
public static final BooleanFlagField HAS_GETTER = FlagField.booleanAfter(IS_VAR);
public static final BooleanFlagField HAS_SETTER = FlagField.booleanAfter(HAS_GETTER);
public static final BooleanFlagField IS_CONST = FlagField.booleanAfter(HAS_SETTER);
public static final BooleanFlagField IS_LATEINIT = FlagField.booleanAfter(IS_CONST);
public static final BooleanFlagField HAS_CONSTANT = FlagField.booleanAfter(IS_LATEINIT);
public static final BooleanFlagField IS_EXTERNAL_PROPERTY = FlagField.booleanAfter(HAS_CONSTANT);
public static final BooleanFlagField IS_DELEGATED = FlagField.booleanAfter(IS_EXTERNAL_PROPERTY);
public static final BooleanFlagField IS_EXPECT_PROPERTY = FlagField.booleanAfter(IS_DELEGATED);
// Parameters
public static final BooleanFlagField DECLARES_DEFAULT_VALUE = FlagField.booleanAfter(HAS_ANNOTATIONS);
public static final BooleanFlagField IS_CROSSINLINE = FlagField.booleanAfter(DECLARES_DEFAULT_VALUE);
public static final BooleanFlagField IS_NOINLINE = FlagField.booleanAfter(IS_CROSSINLINE);
// Accessors
public static final BooleanFlagField IS_NOT_DEFAULT = FlagField.booleanAfter(MODALITY);
public static final BooleanFlagField IS_EXTERNAL_ACCESSOR = FlagField.booleanAfter(IS_NOT_DEFAULT);
public static final BooleanFlagField IS_INLINE_ACCESSOR = FlagField.booleanAfter(IS_EXTERNAL_ACCESSOR);
// Contracts expressions
public static final BooleanFlagField IS_NEGATED = FlagField.booleanFirst();
public static final BooleanFlagField IS_NULL_CHECK_PREDICATE = FlagField.booleanAfter(IS_NEGATED);
// Annotations
public static final BooleanFlagField IS_UNSIGNED = FlagField.booleanFirst();
// ---
public static int getTypeFlags(boolean isSuspend, boolean isDefinitelyNotNull) {
return SUSPEND_TYPE.toFlags(isSuspend) | DEFINITELY_NOT_NULL_TYPE.toFlags(isDefinitelyNotNull);
}
public static int getClassFlags(
boolean hasAnnotations,
@NotNull ProtoBuf.Visibility visibility,
@NotNull ProtoBuf.Modality modality,
@NotNull ProtoBuf.Class.Kind kind,
boolean inner,
boolean isData,
boolean isExternal,
boolean isExpect,
boolean isValue,
boolean isFun,
boolean hasEnumEntries
) {
return HAS_ANNOTATIONS.toFlags(hasAnnotations)
| MODALITY.toFlags(modality)
| VISIBILITY.toFlags(visibility)
| CLASS_KIND.toFlags(kind)
| IS_INNER.toFlags(inner)
| IS_DATA.toFlags(isData)
| IS_EXTERNAL_CLASS.toFlags(isExternal)
| IS_EXPECT_CLASS.toFlags(isExpect)
| IS_VALUE_CLASS.toFlags(isValue)
| IS_FUN_INTERFACE.toFlags(isFun)
| HAS_ENUM_ENTRIES.toFlags(hasEnumEntries)
;
}
public static int getConstructorFlags(
boolean hasAnnotations,
@NotNull ProtoBuf.Visibility visibility,
boolean isSecondary,
boolean hasStableParameterNames
) {
return HAS_ANNOTATIONS.toFlags(hasAnnotations)
| VISIBILITY.toFlags(visibility)
| IS_SECONDARY.toFlags(isSecondary)
| IS_CONSTRUCTOR_WITH_NON_STABLE_PARAMETER_NAMES.toFlags(!hasStableParameterNames)
;
}
public static int getFunctionFlags(
boolean hasAnnotations,
@NotNull ProtoBuf.Visibility visibility,
@NotNull ProtoBuf.Modality modality,
@NotNull ProtoBuf.MemberKind memberKind,
boolean isOperator,
boolean isInfix,
boolean isInline,
boolean isTailrec,
boolean isExternal,
boolean isSuspend,
boolean isExpect,
boolean hasStableParameterNames
) {
return HAS_ANNOTATIONS.toFlags(hasAnnotations)
| VISIBILITY.toFlags(visibility)
| MODALITY.toFlags(modality)
| MEMBER_KIND.toFlags(memberKind)
| IS_OPERATOR.toFlags(isOperator)
| IS_INFIX.toFlags(isInfix)
| IS_INLINE.toFlags(isInline)
| IS_TAILREC.toFlags(isTailrec)
| IS_EXTERNAL_FUNCTION.toFlags(isExternal)
| IS_SUSPEND.toFlags(isSuspend)
| IS_EXPECT_FUNCTION.toFlags(isExpect)
| IS_FUNCTION_WITH_NON_STABLE_PARAMETER_NAMES.toFlags(!hasStableParameterNames)
;
}
public static int getPropertyFlags(
boolean hasAnnotations,
@NotNull ProtoBuf.Visibility visibility,
@NotNull ProtoBuf.Modality modality,
@NotNull ProtoBuf.MemberKind memberKind,
boolean isVar,
boolean hasGetter,
boolean hasSetter,
boolean hasConstant,
boolean isConst,
boolean lateInit,
boolean isExternal,
boolean isDelegated,
boolean isExpect
) {
return HAS_ANNOTATIONS.toFlags(hasAnnotations)
| VISIBILITY.toFlags(visibility)
| MODALITY.toFlags(modality)
| MEMBER_KIND.toFlags(memberKind)
| IS_VAR.toFlags(isVar)
| HAS_GETTER.toFlags(hasGetter)
| HAS_SETTER.toFlags(hasSetter)
| IS_CONST.toFlags(isConst)
| IS_LATEINIT.toFlags(lateInit)
| HAS_CONSTANT.toFlags(hasConstant)
| IS_EXTERNAL_PROPERTY.toFlags(isExternal)
| IS_DELEGATED.toFlags(isDelegated)
| IS_EXPECT_PROPERTY.toFlags(isExpect)
;
}
public static int getAccessorFlags(
boolean hasAnnotations,
@NotNull ProtoBuf.Visibility visibility,
@NotNull ProtoBuf.Modality modality,
boolean isNotDefault,
boolean isExternal,
boolean isInlineAccessor
) {
return HAS_ANNOTATIONS.toFlags(hasAnnotations)
| MODALITY.toFlags(modality)
| VISIBILITY.toFlags(visibility)
| IS_NOT_DEFAULT.toFlags(isNotDefault)
| IS_EXTERNAL_ACCESSOR.toFlags(isExternal)
| IS_INLINE_ACCESSOR.toFlags(isInlineAccessor)
;
}
public static int getContractExpressionFlags(boolean isNegated, boolean isNullCheckPredicate) {
return IS_NEGATED.toFlags(isNegated)
| IS_NULL_CHECK_PREDICATE.toFlags(isNullCheckPredicate);
}
public static int getValueParameterFlags(
boolean hasAnnotations,
boolean declaresDefaultValue,
boolean isCrossinline,
boolean isNoinline
) {
return HAS_ANNOTATIONS.toFlags(hasAnnotations)
| DECLARES_DEFAULT_VALUE.toFlags(declaresDefaultValue)
| IS_CROSSINLINE.toFlags(isCrossinline)
| IS_NOINLINE.toFlags(isNoinline)
;
}
public static int getTypeAliasFlags(boolean hasAnnotations, ProtoBuf.Visibility visibility) {
return HAS_ANNOTATIONS.toFlags(hasAnnotations)
| VISIBILITY.toFlags(visibility)
;
}
// Infrastructure
public static abstract class FlagField {
public static FlagField after(FlagField previousField, E[] values) {
int offset = previousField.offset + previousField.bitWidth;
return new EnumLiteFlagField(offset, values);
}
public static FlagField first(E[] values) {
return new EnumLiteFlagField(0, values);
}
public static BooleanFlagField booleanFirst() {
return new BooleanFlagField(0);
}
public static BooleanFlagField booleanAfter(FlagField previousField) {
int offset = previousField.offset + previousField.bitWidth;
return new BooleanFlagField(offset);
}
public final int offset;
public final int bitWidth;
private FlagField(int offset, int bitWidth) {
this.offset = offset;
this.bitWidth = bitWidth;
}
public abstract E get(int flags);
public abstract int toFlags(E value);
}
@SuppressWarnings("WeakerAccess")
public static class BooleanFlagField extends FlagField {
public BooleanFlagField(int offset) {
super(offset, 1);
}
@Override
@NotNull
public Boolean get(int flags) {
return (flags & (1 << offset)) != 0;
}
@Override
public int toFlags(Boolean value) {
return value ? 1 << offset : 0;
}
public int invert(int flags) { return (flags ^ (1 << offset)); }
}
private static class EnumLiteFlagField extends FlagField {
private final E[] values;
public EnumLiteFlagField(int offset, E[] values) {
super(offset, bitWidth(values));
this.values = values;
}
private static int bitWidth(@NotNull E[] enumEntries) {
int length = enumEntries.length - 1;
if (length == 0) return 1;
for (int i = 31; i >= 0; i--) {
if ((length & (1 << i)) != 0) return i + 1;
}
throw new IllegalStateException("Empty enum: " + enumEntries.getClass());
}
@Override
@Nullable
public E get(int flags) {
int maskUnshifted = (1 << bitWidth) - 1;
int mask = maskUnshifted << offset;
int value = (flags & mask) >> offset;
for (E e : values) {
if (e.getNumber() == value) {
return e;
}
}
return null;
}
@Override
public int toFlags(E value) {
return value.getNumber() << offset;
}
}
}
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