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author | michelou <michelou@epfl.ch> | 2006-10-31 12:20:22 +0000 |
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committer | michelou <michelou@epfl.ch> | 2006-10-31 12:20:22 +0000 |
commit | 5352638cee8a3b7b67d2dc717f651984b4f7001b (patch) | |
tree | af6371e0c008e57e5605d29bd0b4b8e62a03933a /src | |
parent | ee7252af4701c57adde1da9ab2e0a19d388c2a7b (diff) | |
download | scala-5352638cee8a3b7b67d2dc717f651984b4f7001b.tar.gz scala-5352638cee8a3b7b67d2dc717f651984b4f7001b.tar.bz2 scala-5352638cee8a3b7b67d2dc717f651984b4f7001b.zip |
minor cleanups in classfile/Pickler.scala
Diffstat (limited to 'src')
-rw-r--r-- | src/compiler/scala/tools/nsc/symtab/classfile/Pickler.scala | 90 |
1 files changed, 58 insertions, 32 deletions
diff --git a/src/compiler/scala/tools/nsc/symtab/classfile/Pickler.scala b/src/compiler/scala/tools/nsc/symtab/classfile/Pickler.scala index 2886a5e0de..8e50764b8d 100644 --- a/src/compiler/scala/tools/nsc/symtab/classfile/Pickler.scala +++ b/src/compiler/scala/tools/nsc/symtab/classfile/Pickler.scala @@ -6,26 +6,25 @@ package scala.tools.nsc.symtab.classfile -import java.io._ import java.lang.{Float, Double} import scala.collection.mutable.HashMap import scala.tools.nsc.util.Position import Flags._ import PickleFormat._ - - /** - * Serialize a top-level module and/or class; + * Serialize a top-level module and/or class. + * + * @see <code>EntryTags.scala</code> for symbol table attribute format. * * @author Martin Odersky * @version 1.0 - * @see EntryTags.scala for symbol table attribute format. */ abstract class Pickler extends SubComponent { import global._ val phaseName = "pickler" + def newPhase(prev: Phase): StdPhase = new PicklePhase(prev) class PicklePhase(prev: Phase) extends StdPhase(prev) { @@ -34,9 +33,9 @@ abstract class Pickler extends SubComponent { def add(sym: Symbol, pickle: Pickle) = { if (currentRun.compiles(sym) && !currentRun.symData.contains(sym)) { - if (settings.debug.value) log("pickling " + sym); - pickle.putSymbol(sym); - currentRun.symData(sym) = pickle; + if (settings.debug.value) log("pickling " + sym) + pickle.putSymbol(sym) + currentRun.symData(sym) = pickle } } @@ -56,12 +55,17 @@ abstract class Pickler extends SubComponent { } } - class Pickle(rootName: Name, rootOwner: Symbol) extends PickleBuffer(new Array[byte](4096), -1, 0) { + private class Pickle(rootName: Name, rootOwner: Symbol) + extends PickleBuffer(new Array[byte](4096), -1, 0) { private var entries = new Array[AnyRef](256) private var ep = 0 private val index = new HashMap[AnyRef, int] - /** Is root in symbol.owner*? */ + /** Is root in symbol.owner*? + * + * @param sym ... + * @return ... + */ private def isLocal(sym: Symbol): boolean = ( sym.isRefinementClass || sym.name.toTermName == rootName && sym.owner == rootOwner || @@ -70,8 +74,12 @@ abstract class Pickler extends SubComponent { // Phase 1 methods: Populate entries/index ------------------------------------ - /** Store entry `e' in index at next available position unless it it - * already there. Return true iff entry is new. */ + /** Store entry <code>e</code> in index at next available position unless + * it is already there. + * + * @param entry ... + * @return <code>true</code> iff entry is new. + */ private def putEntry(entry: AnyRef): boolean = index.get(entry) match { case Some(_) => false case None => @@ -86,7 +94,11 @@ abstract class Pickler extends SubComponent { true } - /** Store symbol in index. If symbol is local, also store everything it refers to. */ + /** Store symbol in <code>index</code>. If symbol is local, also store + * everything it refers to. + * + * @param sym ... + */ def putSymbol(sym: Symbol): unit = if (putEntry(sym)) { if (isLocal(sym)) { putEntry(sym.name) @@ -103,9 +115,13 @@ abstract class Pickler extends SubComponent { if (!sym.owner.isRoot) putSymbol(sym.owner) } } - private def putSymbols(syms: List[Symbol]) = syms foreach putSymbol; + private def putSymbols(syms: List[Symbol]) = + syms foreach putSymbol - /** Store type and everythig it refers to in index. */ + /** Store type and everythig it refers to in map <code>index</code>. + * + * @param tp ... + */ private def putType(tp: Type): unit = if (putEntry(tp)) { tp match { case NoType | NoPrefix => @@ -119,7 +135,7 @@ abstract class Pickler extends SubComponent { case TypeRef(pre, sym, args) => putType(pre); putSymbol(sym); putTypes(args) case TypeBounds(lo, hi) => - putType(lo); putType(hi); + putType(lo); putType(hi) case RefinedType(parents, decls) => putSymbol(tp.symbol); putTypes(parents); putSymbols(decls.toList) case ClassInfoType(parents, decls, clazz) => @@ -132,14 +148,17 @@ abstract class Pickler extends SubComponent { throw new FatalError("bad type: " + tp + "(" + tp.getClass() + ")") } } - private def putTypes(tps: List[Type]): unit = tps foreach putType; + private def putTypes(tps: List[Type]): unit = tps foreach putType + /** Store constant in map <code>index</code>. + * + * @param c ... + */ private def putConstant(c: Constant) = if (putEntry(c)) { if (c.tag == StringTag) putEntry(newTermName(c.stringValue)) else if (c.tag == ClassTag) putEntry(c.typeValue) } - /* private def putAttribute(attr: AttrInfo): unit = if (putEntry(attr)) { putType(attr._1); @@ -148,13 +167,21 @@ abstract class Pickler extends SubComponent { */ // Phase 2 methods: Write all entries to byte array ------------------------------ - private val buf = new PickleBuffer(new Array[byte](4096), -1, 0); + private val buf = new PickleBuffer(new Array[byte](4096), -1, 0) - /** Write a reference to object, i.e., the object's number in the index. */ - private def writeRef(ref: AnyRef): unit = writeNat(index(ref)); - private def writeRefs(refs: List[AnyRef]): unit = refs foreach writeRef; + /** Write a reference to object, i.e., the object's number in the map + * <code>index</code>. + * + * @param ref ... + */ + private def writeRef(ref: AnyRef): unit = writeNat(index(ref)) + private def writeRefs(refs: List[AnyRef]): unit = refs foreach writeRef - /** Write name, owner, flags, and info of a symbol */ + /** Write name, owner, flags, and info of a symbol. + * + * @param sym ... + * @return the position offset + */ private def writeSymInfo(sym: Symbol): int = { var posOffset = 0 if (sym.pos != Position.NOPOS && sym.owner.isClass) { @@ -163,13 +190,13 @@ abstract class Pickler extends SubComponent { } writeRef(sym.name) writeRef(sym.owner) - writeNat((sym.flags & PickledFlags).asInstanceOf[int]); - if (sym.privateWithin != NoSymbol) writeRef(sym.privateWithin); + writeNat((sym.flags & PickledFlags).asInstanceOf[int]) + if (sym.privateWithin != NoSymbol) writeRef(sym.privateWithin) writeRef(sym.info) posOffset } - /** Write a name in Utf8 format. */ + /** Write a name in UTF8 format. */ def writeName(name: Name): unit = { ensureCapacity(name.length * 3) writeIndex = name.copyUTF8(bytes, writeIndex) @@ -231,9 +258,9 @@ abstract class Pickler extends SubComponent { if (c.tag == BooleanTag) writeLong(if (c.booleanValue) 1 else 0) else if (ByteTag <= c.tag && c.tag <= LongTag) writeLong(c.longValue) else if (c.tag == FloatTag) writeLong(Float.floatToIntBits(c.floatValue)) - else if (c.tag == DoubleTag) writeLong(Double.doubleToLongBits(c.doubleValue)); - else if (c.tag == StringTag) writeRef(newTermName(c.stringValue)); - else if (c.tag == ClassTag) writeRef(c.typeValue); + else if (c.tag == DoubleTag) writeLong(Double.doubleToLongBits(c.doubleValue)) + else if (c.tag == StringTag) writeRef(newTermName(c.stringValue)) + else if (c.tag == ClassTag) writeRef(c.typeValue) LITERAL + c.tag /* case Pair(tp, cs) => @@ -242,7 +269,7 @@ abstract class Pickler extends SubComponent { ATTRIBUTE */ case _ => - throw new FatalError("bad entry: " + entry + " " + entry.getClass());//debug + throw new FatalError("bad entry: " + entry + " " + entry.getClass())//debug } val startpos = writeIndex writeByte(0); writeByte(0) @@ -260,7 +287,6 @@ abstract class Pickler extends SubComponent { for (val i <- 0 until ep) writeEntry(entries(i)); } - override def toString() = "" + rootName + " in " + rootOwner; + override def toString() = "" + rootName + " in " + rootOwner } } - |