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package dotty.tools.dotc
package util
import java.io.{File, FileInputStream, PrintStream}
import java.lang.Long.toHexString
import java.lang.Float.intBitsToFloat
import java.lang.Double.longBitsToDouble
import core.unpickleScala2.PickleBuffer
import core.Names._
object ShowPickled {
import core.unpickleScala2.PickleFormat._
case class PickleBufferEntry(num: Int, startIndex: Int, tag: Int, bytes: Array[Byte]) {
def isName = tag == TERMname || tag == TYPEname
def hasName = tag match {
case TYPEsym | ALIASsym | CLASSsym | MODULEsym | VALsym | EXTref | EXTMODCLASSref => true
case _ => false
}
def readName =
if (isName) new String(bytes, "UTF-8")
else sys.error("%s is no name" format tagName)
def nameIndex =
if (hasName) readNat(bytes, 0)
else sys.error("%s has no name" format tagName)
def tagName = tag2string(tag)
override def toString = "%d,%d: %s".format(num, startIndex, tagName)
}
case class PickleBufferEntryList(entries: IndexedSeq[PickleBufferEntry]) {
def nameAt(idx: Int) = {
val entry = entries(idx)
if (entry.isName) entry.readName
else if (entry.hasName) entries(entry.nameIndex).readName
else "?"
}
}
def makeEntryList(buf: PickleBuffer, index: Array[Int]) = {
val entries = buf.toIndexedSeq.zipWithIndex map {
case ((tag, data), num) => PickleBufferEntry(num, index(num), tag, data)
}
PickleBufferEntryList(entries)
}
def tag2string(tag: Int): String = tag match {
case TERMname => "TERMname"
case TYPEname => "TYPEname"
case NONEsym => "NONEsym"
case TYPEsym => "TYPEsym"
case ALIASsym => "ALIASsym"
case CLASSsym => "CLASSsym"
case MODULEsym => "MODULEsym"
case VALsym => "VALsym"
case EXTref => "EXTref"
case EXTMODCLASSref => "EXTMODCLASSref"
case NOtpe => "NOtpe"
case NOPREFIXtpe => "NOPREFIXtpe"
case THIStpe => "THIStpe"
case SINGLEtpe => "SINGLEtpe"
case CONSTANTtpe => "CONSTANTtpe"
case TYPEREFtpe => "TYPEREFtpe"
case TYPEBOUNDStpe => "TYPEBOUNDStpe"
case REFINEDtpe => "REFINEDtpe"
case CLASSINFOtpe => "CLASSINFOtpe"
case METHODtpe => "METHODtpe"
case POLYtpe => "POLYtpe"
case IMPLICITMETHODtpe => "METHODtpe" // IMPLICITMETHODtpe no longer used.
case SUPERtpe => "SUPERtpe"
case LITERALunit => "LITERALunit"
case LITERALboolean => "LITERALboolean"
case LITERALbyte => "LITERALbyte"
case LITERALshort => "LITERALshort"
case LITERALchar => "LITERALchar"
case LITERALint => "LITERALint"
case LITERALlong => "LITERALlong"
case LITERALfloat => "LITERALfloat"
case LITERALdouble => "LITERALdouble"
case LITERALstring => "LITERALstring"
case LITERALnull => "LITERALnull"
case LITERALclass => "LITERALclass"
case LITERALenum => "LITERALenum"
case SYMANNOT => "SYMANNOT"
case CHILDREN => "CHILDREN"
case ANNOTATEDtpe => "ANNOTATEDtpe"
case ANNOTINFO => "ANNOTINFO"
case ANNOTARGARRAY => "ANNOTARGARRAY"
// case DEBRUIJNINDEXtpe => "DEBRUIJNINDEXtpe"
case EXISTENTIALtpe => "EXISTENTIALtpe"
case TREE => "TREE"
case MODIFIERS => "MODIFIERS"
case _ => "***BAD TAG***(" + tag + ")"
}
/** Extremely regrettably, essentially copied from PickleBuffer.
*/
def readNat(data: Array[Byte], index: Int): Int = {
var idx = index
var result = 0L
var b = 0L
do {
b = data(idx)
idx += 1
result = (result << 7) + (b & 0x7f)
} while((b & 0x80) != 0L)
result.toInt
}
def printFile(buf: PickleBuffer, out: PrintStream = System.out): Unit = {
out.println("Version " + buf.readNat() + "." + buf.readNat())
val index = buf.createIndex
val entryList = makeEntryList(buf, index)
buf.readIndex = 0
def p(s: String) = out print s
def printNameRef(): Unit = {
val idx = buf.readNat()
val name = entryList nameAt idx
val toPrint = " %s(%s)".format(idx, name)
out print toPrint
}
def printNat() = p(" " + buf.readNat())
def printReadNat(x: Int) = p(" " + x)
def printSymbolRef() = printNat()
def printTypeRef() = printNat()
def printConstantRef() = printNat()
def printAnnotInfoRef() = printNat()
def printConstAnnotArgRef() = printNat()
def printAnnotArgRef() = printNat()
def printSymInfo(end: Int, isType: Boolean): Unit = {
printNameRef()
printSymbolRef()
val pflags = buf.readLongNat()
def printFlags(privateWithin: Option[Int]) = {
val accessBoundary = (
for (idx <- privateWithin) yield {
val s = entryList nameAt idx
idx + "(" + s + ")"
}
)
val flagString = PickleBuffer.unpickleScalaFlags(pflags, isType).toString
out.print(" %s[%s]".format(toHexString(pflags), flagString))
}
/** Might be info or privateWithin */
val x = buf.readNat()
if (buf.readIndex == end) {
printFlags(None)
printReadNat(x)
}
else {
printFlags(Some(x))
printTypeRef()
}
}
/** Note: the entries which require some semantic analysis to be correctly
* interpreted are for the most part going to tell you the wrong thing.
* It's not so easy to duplicate the logic applied in the UnPickler.
*/
def printEntry(i: Int): Unit = {
buf.readIndex = index(i)
p(i + "," + buf.readIndex + ": ")
val tag = buf.readByte()
out.print(tag2string(tag))
val len = buf.readNat()
val end = len + buf.readIndex
p(" " + len + ":")
tag match {
case TERMname =>
out.print(" ")
out.print(termName(buf.bytes, buf.readIndex, len).toString)
buf.readIndex = end
case TYPEname =>
out.print(" ")
out.print(typeName(buf.bytes, buf.readIndex, len))
buf.readIndex = end
case TYPEsym | ALIASsym | CLASSsym | MODULEsym | VALsym =>
printSymInfo(end, tag == TYPEsym || tag == ALIASsym || tag == CLASSsym)
if (tag == CLASSsym && (buf.readIndex < end)) printTypeRef()
case EXTref | EXTMODCLASSref =>
printNameRef()
if (buf.readIndex < end) { printSymbolRef() }
case THIStpe =>
printSymbolRef()
case SINGLEtpe =>
printTypeRef(); printSymbolRef()
case CONSTANTtpe =>
printTypeRef(); printConstantRef()
case TYPEREFtpe =>
printTypeRef(); printSymbolRef(); buf.until(end, printTypeRef)
case TYPEBOUNDStpe =>
printTypeRef(); printTypeRef()
case REFINEDtpe =>
printSymbolRef(); buf.until(end, printTypeRef)
case CLASSINFOtpe =>
printSymbolRef(); buf.until(end, printTypeRef)
case METHODtpe | IMPLICITMETHODtpe =>
printTypeRef(); buf.until(end, printTypeRef)
case POLYtpe =>
printTypeRef(); buf.until(end, printSymbolRef)
case LITERALboolean =>
out.print(if (buf.readLong(len) == 0L) " false" else " true")
case LITERALbyte =>
out.print(" " + buf.readLong(len).toByte)
case LITERALshort =>
out.print(" " + buf.readLong(len).toShort)
case LITERALchar =>
out.print(" " + buf.readLong(len).toChar)
case LITERALint =>
out.print(" " + buf.readLong(len).toInt)
case LITERALlong =>
out.print(" " + buf.readLong(len))
case LITERALfloat =>
out.print(" " + intBitsToFloat(buf.readLong(len).toInt))
case LITERALdouble =>
out.print(" " + longBitsToDouble(buf.readLong(len)))
case LITERALstring =>
printNameRef()
case LITERALenum =>
printSymbolRef()
case LITERALnull =>
out.print(" <null>")
case LITERALclass =>
printTypeRef()
case CHILDREN =>
printSymbolRef(); buf.until(end, printSymbolRef)
case SYMANNOT =>
printSymbolRef(); printTypeRef(); buf.until(end, printAnnotArgRef)
case ANNOTATEDtpe =>
printTypeRef(); buf.until(end, printAnnotInfoRef)
case ANNOTINFO =>
printTypeRef(); buf.until(end, printAnnotArgRef)
case ANNOTARGARRAY =>
buf.until(end, printConstAnnotArgRef)
case EXISTENTIALtpe =>
printTypeRef(); buf.until(end, printSymbolRef)
case _ =>
}
out.println()
if (buf.readIndex != end) {
out.println("BAD ENTRY END: computed = %d, actual = %d, bytes = %s".format(
end, buf.readIndex, buf.bytes.slice(index(i), (end max buf.readIndex)).mkString(", ")
))
}
}
for (i <- 0 until index.length) printEntry(i)
}
/*
*
def fromFile(path: String) = fromBytes(io.File(path).toByteArray)
def fromName(name: String) = fromBytes(scalaSigBytesForPath(name) getOrElse Array())
def fromBytes(data: => Array[Byte]): Option[PickleBuffer] =
try Some(new PickleBuffer(data, 0, data.length))
catch { case _: Exception => None }
def show(what: String, pickle: PickleBuffer) = {
Console.println(what)
val saved = pickle.readIndex
pickle.readIndex = 0
printFile(pickle, Console.out)
pickle.readIndex = saved
}
def main(args: Array[String]) {
args foreach { arg =>
(fromFile(arg) orElse fromName(arg)) match {
case Some(pb) => show(arg + ":", pb)
case _ => Console.println("Cannot read " + arg)
}
}
}*/
}
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