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|
/* __ *\
** ________ ___ / / ___ __ ____ Scala.js IR **
** / __/ __// _ | / / / _ | __ / // __/ (c) 2014, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ |/_// /_\ \ http://scala-js.org/ **
** /____/\___/_/ |_/____/_/ | |__/ /____/ **
** |/____/ **
\* */
package scala.scalajs.ir
import java.io._
import Infos._
object InfoSerializers {
/** Scala.js IR File Magic Number
*
* CA FE : first part of magic number of Java class files
* 4A 53 : "JS" in ASCII
*
*/
final val IRMagicNumber = 0xCAFE4A53
def serialize(stream: OutputStream, classInfo: ClassInfo): Unit = {
new Serializer().serialize(stream, classInfo)
}
def deserializeRoughInfo(stream: InputStream): RoughClassInfo = {
deserializeVersionRoughInfo(stream)._2
}
def deserializeFullInfo(stream: InputStream): ClassInfo = {
deserializeVersionFullInfo(stream)._2
}
def deserializeVersionRoughInfo(stream: InputStream): (String, RoughClassInfo) = {
new Deserializer(stream).deserializeRough()
}
def deserializeVersionFullInfo(stream: InputStream): (String, ClassInfo) = {
new Deserializer(stream).deserializeFull()
}
private final class Serializer {
def serialize(stream: OutputStream, classInfo: ClassInfo): Unit = {
val s = new DataOutputStream(stream)
def writeSeq[A](seq: Seq[A])(writeElem: A => Unit): Unit = {
s.writeInt(seq.size)
seq.foreach(writeElem)
}
def writeStrings(seq: Seq[String]): Unit =
writeSeq(seq)(s.writeUTF(_))
// Write the Scala.js IR magic number
s.writeInt(IRMagicNumber)
// Write the Scala.js Version
s.writeUTF(ScalaJSVersions.binaryEmitted)
import classInfo._
s.writeUTF(name)
s.writeUTF(encodedName)
s.writeBoolean(isExported)
s.writeInt(ancestorCount)
s.writeByte(ClassKind.toByte(kind))
s.writeUTF(superClass)
writeStrings(ancestors)
s.writeInt(optimizerHints.bits)
def writeMethodInfo(methodInfo: MethodInfo): Unit = {
import methodInfo._
s.writeUTF(encodedName)
s.writeBoolean(isAbstract)
s.writeBoolean(isExported)
writeSeq(calledMethods.toSeq) {
case (caller, callees) => s.writeUTF(caller); writeStrings(callees)
}
writeSeq(calledMethodsStatic.toSeq) {
case (caller, callees) => s.writeUTF(caller); writeStrings(callees)
}
writeStrings(instantiatedClasses)
writeStrings(accessedModules)
writeStrings(accessedClassData)
s.writeInt(optimizerHints.bits)
}
writeSeq(methods)(writeMethodInfo(_))
s.flush()
}
}
private final class Deserializer(stream: InputStream) {
private[this] val input = new DataInputStream(stream)
def readList[A](readElem: => A): List[A] =
List.fill(input.readInt())(readElem)
def readStrings(): List[String] =
readList(input.readUTF())
def deserializeRough(): (String, RoughClassInfo) = {
val version = readHeader()
import input._
val name = readUTF()
val encodedName = readUTF()
val isExported = readBoolean()
val ancestorCount = readInt()
val info = RoughClassInfo(name, encodedName, isExported, ancestorCount)
(version, info)
}
def deserializeFull(): (String, ClassInfo) = {
val version = readHeader()
import input._
val name = readUTF()
val encodedName = readUTF()
val isExported = readBoolean()
val ancestorCount = readInt()
val kind = ClassKind.fromByte(readByte())
val superClass = readUTF()
val ancestors = readList(readUTF())
val optimizerHints =
if (version == "0.5.0" || version == "0.5.2") OptimizerHints.empty
else new OptimizerHints(readInt())
def readMethod(): MethodInfo = {
val encodedName = readUTF()
val isAbstract = readBoolean()
val isExported = readBoolean()
val calledMethods = readList(readUTF() -> readStrings()).toMap
val calledMethodsStatic = readList(readUTF() -> readStrings()).toMap
val instantiatedClasses = readStrings()
val accessedModules = readStrings()
val accessedClassData = readStrings()
val optimizerHints = new OptimizerHints(readInt())
MethodInfo(encodedName, isAbstract, isExported,
calledMethods, calledMethodsStatic,
instantiatedClasses, accessedModules, accessedClassData,
optimizerHints)
}
val methods = readList(readMethod())
val info = ClassInfo(name, encodedName, isExported, ancestorCount, kind,
superClass, ancestors, optimizerHints, methods)
(version, info)
}
/** Reads the Scala.js IR header and verifies the version compatibility.
* Returns the emitted binary version.
*/
def readHeader(): String = {
// Check magic number
if (input.readInt() != IRMagicNumber)
throw new IOException("Not a Scala.js IR file")
// Check that we support this version of the IR
val version = input.readUTF()
val supported = ScalaJSVersions.binarySupported
if (!supported.contains(version)) {
throw new IOException(
s"This version ($version) of Scala.js IR is not supported. " +
s"Supported versions are: ${supported.mkString(", ")}")
}
version
}
}
}
|
