More path fixes

Author: liufengyun

compiler/src/dotty/tools/dotc/classpath/VirtualDirectoryClassPath.scala

@@ -24,7 +24,7 @@ case class VirtualDirectoryClassPath(dir: VirtualDirectory) extends ClassPath wi
 
   protected def emptyFiles: Array[AbstractFile] = Array.empty
   protected def getSubDir(packageDirName: String): Option[AbstractFile] =
-    Option(lookupPath(dir)(packageDirName.split('/'), directory = true))
+    Option(lookupPath(dir)(packageDirName.split(java.io.File.separator), directory = true))
   protected def listChildren(dir: AbstractFile, filter: Option[AbstractFile => Boolean] = None): Array[F] = filter match {
     case Some(f) => dir.iterator.filter(f).toArray
     case _ => dir.toArray
@@ -41,7 +41,7 @@ case class VirtualDirectoryClassPath(dir: VirtualDirectory) extends ClassPath wi
 
   def findClassFile(className: String): Option[AbstractFile] = {
     val relativePath = FileUtils.dirPath(className) + ".class"
-    Option(lookupPath(dir)(relativePath split '/', directory = false))
+    Option(lookupPath(dir)(relativePath.split(java.io.File.separator), directory = false))
   }
 
   private[dotty] def classes(inPackage: String): Seq[ClassFileEntry] = files(inPackage)

compiler/src/dotty/tools/dotc/classpath/ZipArchiveFileLookup.scala

@@ -66,7 +66,7 @@ trait ZipArchiveFileLookup[FileEntryType <: ClassRepresentation] extends ClassPa
   }
 
   private def findDirEntry(pkg: String): Option[archive.DirEntry] = {
-    val dirName = s"${FileUtils.dirPath(pkg)}/"
+    val dirName = pkg.replace('.', '/')
     archive.allDirs.get(dirName)
   }