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/*
* Scala.js (https://www.scala-js.org/)
*
* Copyright EPFL.
*
* Licensed under Apache License 2.0
* (https://www.apache.org/licenses/LICENSE-2.0).
*
* See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*/
package org.scalajs.ir
import scala.annotation.{switch, tailrec}
import Types._
object Names {
// scalastyle:off equals.hash.code
// we define hashCode() once in Name, but equals() separately in its subclasses
sealed abstract class Name(val encoded: UTF8String) {
type ThisName <: Name
// Eagerly compute the hash code
private val _hashCode = UTF8String.hashCode(encoded)
override def hashCode(): Int = _hashCode
protected final def equalsName(that: ThisName): Boolean = {
this._hashCode == that._hashCode && // fail fast on different hash codes
UTF8String.equals(this.encoded, that.encoded)
}
def compareTo(that: ThisName): Int = {
// scalastyle:off return
val thisEncoded = this.encoded
val thatEncoded = that.encoded
val thisEncodedLen = thisEncoded.length
val thatEncodedLen = thatEncoded.length
val minLen = Math.min(thisEncodedLen, thatEncodedLen)
var i = 0
while (i != minLen) {
val cmp = java.lang.Byte.compare(thisEncoded(i), thatEncoded(i))
if (cmp != 0)
return cmp
i += 1
}
Integer.compare(thisEncodedLen, thatEncodedLen)
// scalastyle:on return
}
protected def stringPrefix: String
final def nameString: String =
encoded.toString()
override def toString(): String =
stringPrefix + "<" + nameString + ">"
}
/** The name of a local variable or capture parameter.
*
* Local names must be non-empty, and can contain any Unicode code point
* except `/ . ; [`.
*/
final class LocalName private (encoded: UTF8String)
extends Name(encoded) with Comparable[LocalName] {
type ThisName = LocalName
override def equals(that: Any): Boolean = {
(this eq that.asInstanceOf[AnyRef]) || (that match {
case that: LocalName => equalsName(that)
case _ => false
})
}
protected def stringPrefix: String = "LocalName"
final def withPrefix(prefix: LocalName): LocalName =
new LocalName(prefix.encoded ++ this.encoded)
final def withPrefix(prefix: String): LocalName =
LocalName(UTF8String(prefix) ++ this.encoded)
final def withSuffix(suffix: LocalName): LocalName =
new LocalName(this.encoded ++ suffix.encoded)
final def withSuffix(suffix: String): LocalName =
LocalName(this.encoded ++ UTF8String(suffix))
}
object LocalName {
def apply(name: UTF8String): LocalName =
new LocalName(validateSimpleEncodedName(name))
def apply(name: String): LocalName =
LocalName(UTF8String(name))
private[Names] def fromFieldName(name: FieldName): LocalName =
new LocalName(name.encoded)
}
/** The name of the label of a `Labeled` block.
*
* Label names must be non-empty, and can contain any Unicode code point
* except `/ . ; [`.
*/
final class LabelName private (encoded: UTF8String)
extends Name(encoded) with Comparable[LabelName] {
type ThisName = LabelName
override def equals(that: Any): Boolean = {
(this eq that.asInstanceOf[AnyRef]) || (that match {
case that: LabelName => equalsName(that)
case _ => false
})
}
protected def stringPrefix: String = "LabelName"
final def withSuffix(suffix: LabelName): LabelName =
new LabelName(this.encoded ++ suffix.encoded)
final def withSuffix(suffix: String): LabelName =
LabelName(this.encoded ++ UTF8String(suffix))
}
object LabelName {
def apply(name: UTF8String): LabelName =
new LabelName(validateSimpleEncodedName(name))
def apply(name: String): LabelName =
LabelName(UTF8String(name))
}
/** The name of a field.
*
* Field names must be non-empty, and can contain any Unicode code point
* except `/ . ; [`.
*/
final class FieldName private (encoded: UTF8String)
extends Name(encoded) with Comparable[FieldName] {
type ThisName = FieldName
override def equals(that: Any): Boolean = {
(this eq that.asInstanceOf[AnyRef]) || (that match {
case that: FieldName => equalsName(that)
case _ => false
})
}
protected def stringPrefix: String = "FieldName"
final def withSuffix(suffix: String): FieldName =
FieldName(this.encoded ++ UTF8String(suffix))
final def toLocalName: LocalName =
LocalName.fromFieldName(this)
}
object FieldName {
def apply(name: UTF8String): FieldName =
new FieldName(validateSimpleEncodedName(name))
def apply(name: String): FieldName =
FieldName(UTF8String(name))
}
/** The simple name of a method (excluding its signature).
*
* Simple names must be non-empty, and can contain any Unicode code point
* except `/ . ; [`. In addition, they must not contain the code point `<`
* unless they are one of ``, `` or ``.
*/
final class SimpleMethodName private (encoded: UTF8String)
extends Name(encoded) with Comparable[SimpleMethodName] {
type ThisName = SimpleMethodName
override def equals(that: Any): Boolean = {
(this eq that.asInstanceOf[AnyRef]) || (that match {
case that: SimpleMethodName => equalsName(that)
case _ => false
})
}
protected def stringPrefix: String = "SimpleMethodName"
/** Returns `true` iff this is the name of an instance constructor. */
def isConstructor: Boolean =
this eq SimpleMethodName.Constructor // globally unique, so `eq` is fine
/** Returns `true` iff this is the name of a static initializer. */
def isStaticInitializer: Boolean =
this eq SimpleMethodName.StaticInitializer // globally unique, so `eq` is fine
/** Returns `true` iff this is the name of a class initializer. */
def isClassInitializer: Boolean =
this eq SimpleMethodName.ClassInitializer // globally unique, so `eq` is fine
}
object SimpleMethodName {
private final val ConstructorSimpleEncodedName: UTF8String =
UTF8String("")
private final val StaticInitializerSimpleEncodedName: UTF8String =
UTF8String("")
private final val ClassInitializerSimpleEncodedName: UTF8String =
UTF8String("")
/** The unique `SimpleMethodName` with encoded name ``. */
val Constructor: SimpleMethodName =
new SimpleMethodName(ConstructorSimpleEncodedName)
/** The unique `SimpleMethodName` with encoded name ``. */
val StaticInitializer: SimpleMethodName =
new SimpleMethodName(StaticInitializerSimpleEncodedName)
/** The unique `SimpleMethodName` with encoded name ``. */
val ClassInitializer: SimpleMethodName =
new SimpleMethodName(ClassInitializerSimpleEncodedName)
def apply(name: UTF8String): SimpleMethodName = {
val len = name.length
if (len == 0)
throwInvalidEncodedName(name)
/* Handle constructor names and static initializer names. When we find
* those, we normalize the returned instance to be one of the unique
* instances, ensuring that they remain globally unique.
*/
if (name(0) == '<') {
// Must be one of '', '' or ''
len match {
case 6 if UTF8String.equals(name, ConstructorSimpleEncodedName) =>
Constructor
case 8 if UTF8String.equals(name, StaticInitializerSimpleEncodedName) =>
StaticInitializer
case 8 if UTF8String.equals(name, ClassInitializerSimpleEncodedName) =>
ClassInitializer
case _ =>
throwInvalidEncodedName(name)
}
} else {
// Normal method name
new SimpleMethodName(
validateSimpleEncodedName(name, 0, len, openAngleBracketOK = false))
}
}
def apply(name: String): SimpleMethodName =
SimpleMethodName(UTF8String(name))
}
@deprecated("Use SimpleMethodName.Constructor instead", "1.14.0")
def ConstructorSimpleName: SimpleMethodName =
SimpleMethodName.Constructor
@deprecated("Use SimpleMethodName.StaticInitializer instead", "1.14.0")
def StaticInitializerSimpleName: SimpleMethodName =
SimpleMethodName.StaticInitializer
@deprecated("Use SimpleMethodName.ClassInitializer instead", "1.14.0")
def ClassInitializerSimpleName: SimpleMethodName =
SimpleMethodName.ClassInitializer
/** The full name of a method, including its simple name and its signature.
*/
final class MethodName private (val simpleName: SimpleMethodName,
val paramTypeRefs: List[TypeRef], val resultTypeRef: TypeRef,
val isReflectiveProxy: Boolean)
extends Comparable[MethodName] {
import MethodName._
private val _hashCode: Int = {
import scala.util.hashing.MurmurHash3._
var acc = 1270301484 // "MethodName".hashCode()
acc = mix(acc, simpleName.##)
acc = mix(acc, paramTypeRefs.##)
acc = mix(acc, resultTypeRef.##)
acc = mixLast(acc, isReflectiveProxy.##)
finalizeHash(acc, 4)
}
override def equals(that: Any): Boolean = {
(this eq that.asInstanceOf[AnyRef]) || (that match {
case that: MethodName =>
this._hashCode == that._hashCode && // fail fast on different hash codes
this.simpleName == that.simpleName &&
this.paramTypeRefs == that.paramTypeRefs &&
this.resultTypeRef == that.resultTypeRef &&
this.isReflectiveProxy == that.isReflectiveProxy
case _ =>
false
})
}
override def hashCode(): Int = _hashCode
def compareTo(that: MethodName): Int = {
@tailrec
def compareParamTypeRefs(xs: List[TypeRef], ys: List[TypeRef]): Int = (xs, ys) match {
case (x :: xr, y :: yr) =>
val cmp = x.compareTo(y)
if (cmp != 0) cmp
else compareParamTypeRefs(xr, yr)
case _ =>
java.lang.Boolean.compare(xs.isEmpty, ys.isEmpty)
}
val simpleCmp = this.simpleName.compareTo(that.simpleName)
if (simpleCmp != 0) {
simpleCmp
} else {
val paramsCmp = compareParamTypeRefs(this.paramTypeRefs, that.paramTypeRefs)
if (paramsCmp != 0) {
paramsCmp
} else {
val reflProxyCmp = java.lang.Boolean.compare(
this.isReflectiveProxy, that.isReflectiveProxy)
if (reflProxyCmp != 0)
reflProxyCmp
else
this.resultTypeRef.compareTo(that.resultTypeRef)
}
}
}
protected def stringPrefix: String = "MethodName"
def nameString: String = {
val builder = new java.lang.StringBuilder
def appendTypeRef(typeRef: TypeRef): Unit = typeRef match {
case PrimRef(tpe) =>
tpe match {
case NoType => builder.append('V')
case BooleanType => builder.append('Z')
case CharType => builder.append('C')
case ByteType => builder.append('B')
case ShortType => builder.append('S')
case IntType => builder.append('I')
case LongType => builder.append('J')
case FloatType => builder.append('F')
case DoubleType => builder.append('D')
case NullType => builder.append('N')
case NothingType => builder.append('E')
}
case ClassRef(className) =>
builder.append('L').append(className.nameString)
case ArrayTypeRef(base, dimensions) =>
var i = 0
while (i != dimensions) {
builder.append('[')
i += 1
}
appendTypeRef(base)
}
builder.append(simpleName.nameString)
for (paramTypeRef <- paramTypeRefs) {
builder.append(';')
appendTypeRef(paramTypeRef)
}
builder.append(';')
if (isReflectiveProxy)
builder.append('R')
else
appendTypeRef(resultTypeRef)
builder.toString()
}
override def toString(): String =
"MethodName<" + nameString + ">"
def displayName: String = {
simpleName.nameString + "(" +
paramTypeRefs.map(_.displayName).mkString(",") + ")" +
(if (isReflectiveProxy) "R" else resultTypeRef.displayName)
}
/** Returns `true` iff this is the name of an instance constructor. */
def isConstructor: Boolean = simpleName.isConstructor
/** Returns `true` iff this is the name of a static initializer. */
def isStaticInitializer: Boolean = simpleName.isStaticInitializer
/** Returns `true` iff this is the name of a class initializer. */
def isClassInitializer: Boolean = simpleName.isClassInitializer
}
object MethodName {
private val ReflectiveProxyResultTypeRef = ClassRef(ObjectClass)
private final val ReflectiveProxyResultTypeName = "java.lang.Object"
def apply(simpleName: SimpleMethodName, paramTypeRefs: List[TypeRef],
resultTypeRef: TypeRef, isReflectiveProxy: Boolean): MethodName = {
if ((simpleName.isConstructor || simpleName.isStaticInitializer ||
simpleName.isClassInitializer) && resultTypeRef != VoidRef) {
throw new IllegalArgumentException(
"A constructor or static initializer must have a void result type")
}
if (isReflectiveProxy && resultTypeRef != ReflectiveProxyResultTypeRef) {
throw new IllegalArgumentException(
"A reflective proxy must have a result type of " +
ReflectiveProxyResultTypeName)
}
new MethodName(simpleName, paramTypeRefs, resultTypeRef,
isReflectiveProxy)
}
// Convenience constructors
def apply(simpleName: SimpleMethodName, paramTypeRefs: List[TypeRef],
resultTypeRef: TypeRef): MethodName = {
apply(simpleName, paramTypeRefs, resultTypeRef, isReflectiveProxy = false)
}
def apply(simpleName: String, paramTypeRefs: List[TypeRef],
resultTypeRef: TypeRef): MethodName = {
apply(SimpleMethodName(simpleName), paramTypeRefs, resultTypeRef)
}
def constructor(paramTypeRefs: List[TypeRef]): MethodName = {
new MethodName(SimpleMethodName.Constructor, paramTypeRefs, VoidRef,
isReflectiveProxy = false)
}
def reflectiveProxy(simpleName: SimpleMethodName,
paramTypeRefs: List[TypeRef]): MethodName = {
apply(simpleName, paramTypeRefs, ReflectiveProxyResultTypeRef,
isReflectiveProxy = true)
}
def reflectiveProxy(simpleName: String,
paramTypeRefs: List[TypeRef]): MethodName = {
reflectiveProxy(SimpleMethodName(simpleName), paramTypeRefs)
}
}
/** The full name of a class.
*
* A class name is non-empty sequence of `.`-separated simple names, where
* each simple name must be non-empty and can contain any Unicode code
* point except `/ . ; [`.
*/
final class ClassName private (encoded: UTF8String)
extends Name(encoded) with Comparable[ClassName] {
type ThisName = ClassName
override def equals(that: Any): Boolean = {
(this eq that.asInstanceOf[AnyRef]) || (that match {
case that: ClassName => equalsName(that)
case _ => false
})
}
protected def stringPrefix: String = "ClassName"
def withSuffix(suffix: String): ClassName =
ClassName(encoded ++ UTF8String(suffix))
}
object ClassName {
def apply(name: UTF8String): ClassName =
new ClassName(validateEncodedClassName(name))
def apply(name: String): ClassName =
ClassName(UTF8String(name))
}
// scalastyle:on equals.hash.code
/** `java.lang.Object`, the root of the class hierarchy. */
val ObjectClass: ClassName = ClassName("java.lang.Object")
// Hijacked classes
val BoxedUnitClass: ClassName = ClassName("java.lang.Void")
val BoxedBooleanClass: ClassName = ClassName("java.lang.Boolean")
val BoxedCharacterClass: ClassName = ClassName("java.lang.Character")
val BoxedByteClass: ClassName = ClassName("java.lang.Byte")
val BoxedShortClass: ClassName = ClassName("java.lang.Short")
val BoxedIntegerClass: ClassName = ClassName("java.lang.Integer")
val BoxedLongClass: ClassName = ClassName("java.lang.Long")
val BoxedFloatClass: ClassName = ClassName("java.lang.Float")
val BoxedDoubleClass: ClassName = ClassName("java.lang.Double")
val BoxedStringClass: ClassName = ClassName("java.lang.String")
/** The set of all hijacked classes. */
val HijackedClasses: Set[ClassName] = Set(
BoxedUnitClass,
BoxedBooleanClass,
BoxedCharacterClass,
BoxedByteClass,
BoxedShortClass,
BoxedIntegerClass,
BoxedLongClass,
BoxedFloatClass,
BoxedDoubleClass,
BoxedStringClass
)
/** The class of things returned by `ClassOf` and `GetClass`. */
val ClassClass: ClassName = ClassName("java.lang.Class")
/** `java.lang.Cloneable`, which is an ancestor of array classes and is used
* by `Clone`.
*/
val CloneableClass: ClassName = ClassName("java.lang.Cloneable")
/** `java.io.Serializable`, which is an ancestor of array classes. */
val SerializableClass: ClassName = ClassName("java.io.Serializable")
/** The superclass of all throwables.
*
* This is the result type of `WrapAsThrowable` nodes, as well as the input
* type of `UnwrapFromThrowable`.
*/
val ThrowableClass = ClassName("java.lang.Throwable")
/** The exception thrown by a division by 0. */
val ArithmeticExceptionClass: ClassName =
ClassName("java.lang.ArithmeticException")
/** The exception thrown by an `ArraySelect` that is out of bounds. */
val ArrayIndexOutOfBoundsExceptionClass: ClassName =
ClassName("java.lang.ArrayIndexOutOfBoundsException")
/** The exception thrown by an `Assign(ArraySelect, ...)` where the value cannot be stored. */
val ArrayStoreExceptionClass: ClassName =
ClassName("java.lang.ArrayStoreException")
/** The exception thrown by a `NewArray(...)` with a negative size. */
val NegativeArraySizeExceptionClass: ClassName =
ClassName("java.lang.NegativeArraySizeException")
/** The exception thrown by a variety of nodes for `null` arguments.
*
* - `Apply` and `ApplyStatically` for the receiver,
* - `Select` for the qualifier,
* - `ArrayLength` and `ArraySelect` for the array,
* - `GetClass`, `Clone` and `UnwrapFromException` for their respective only arguments.
*/
val NullPointerExceptionClass: ClassName =
ClassName("java.lang.NullPointerException")
/** The exception thrown by a `BinaryOp.String_charAt` that is out of bounds. */
val StringIndexOutOfBoundsExceptionClass: ClassName =
ClassName("java.lang.StringIndexOutOfBoundsException")
/** The exception thrown by an `AsInstanceOf` that fails. */
val ClassCastExceptionClass: ClassName =
ClassName("java.lang.ClassCastException")
/** The set of classes and interfaces that are ancestors of array classes. */
private[ir] val AncestorsOfPseudoArrayClass: Set[ClassName] = {
/* This would logically be defined in Types, but that introduces a cyclic
* dependency between the initialization of Names and Types.
*/
Set(ObjectClass, CloneableClass, SerializableClass)
}
/** Name of a constructor without argument.
*
* This is notably the signature of constructors of module classes.
*/
final val NoArgConstructorName: MethodName =
MethodName.constructor(Nil)
/** This is used to construct a java.lang.Class. */
final val ObjectArgConstructorName: MethodName =
MethodName.constructor(List(ClassRef(ObjectClass)))
/** Name of the static initializer method. */
final val StaticInitializerName: MethodName =
MethodName(SimpleMethodName.StaticInitializer, Nil, VoidRef)
/** Name of the class initializer method. */
final val ClassInitializerName: MethodName =
MethodName(SimpleMethodName.ClassInitializer, Nil, VoidRef)
/** ModuleID of the default module */
final val DefaultModuleID: String = "main"
// ---------------------------------------------------
// ----- Private helpers for validation of names -----
// ---------------------------------------------------
private def throwInvalidEncodedName(encoded: UTF8String): Nothing =
throw new IllegalArgumentException(s"Invalid name: $encoded")
private def validateSimpleEncodedName(encoded: UTF8String): UTF8String =
validateSimpleEncodedName(encoded, 0, encoded.length, openAngleBracketOK = true)
private def validateSimpleEncodedName(encoded: UTF8String, start: Int,
end: Int, openAngleBracketOK: Boolean): UTF8String = {
if (start == end)
throwInvalidEncodedName(encoded)
var i = start
while (i != end) {
(encoded(i).toInt: @switch) match {
case '.' | ';' | '[' | '/' =>
throwInvalidEncodedName(encoded)
case '<' =>
if (!openAngleBracketOK)
throwInvalidEncodedName(encoded)
case _ =>
/* This case is hit for other ASCII characters, but also for the
* leading and continuation bytes of multibyte code points. They are
* all valid, since an `EncodedName` is already guaranteed to be a
* valid UTF-8 sequence.
*/
}
i += 1
}
encoded
}
private def validateEncodedClassName(encoded: UTF8String): UTF8String = {
val len = encoded.length
var i = 0
while (i < len) {
val start = i
while (i != len && encoded(i) != '.')
i += 1
validateSimpleEncodedName(encoded, start, i, openAngleBracketOK = true)
i += 1 // goes to `len + 1` iff we successfully parsed the last segment
}
/* Make sure that there isn't an empty segment at the end. This happens
* either when `len == 0` (in which case the *only* segment is empty) or
* when the last byte in `encoded` is a `.` (example: in `java.lang.`).
*/
if (i == len)
throwInvalidEncodedName(encoded)
encoded
}
}
