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Compiler for the Scala Programming Language
/* NSC -- new Scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Martin Odersky
*/
package scala.reflect
package internal
import annotation.switch
object ClassfileConstants {
final val JAVA_MAGIC = 0xCAFEBABE
final val JAVA_MAJOR_VERSION = 45
final val JAVA_MINOR_VERSION = 3
/** (see http://java.sun.com/docs/books/jvms/second_edition/jvms-clarify.html)
*
* If the `ACC_INTERFACE` flag is set, the `ACC_ABSTRACT` flag must also
* be set (ch. 2.13.1).
*
* A class file cannot have both its `ACC_FINAL` and `ACC_ABSTRACT` flags
* set (ch. 2.8.2).
*
* A field may have at most one of its `ACC_PRIVATE`, `ACC_PROTECTED`,
* `ACC_PUBLIC` flags set (ch. 2.7.4).
*
* A field may not have both its `ACC_FINAL` and `ACC_VOLATILE` flags set
* (ch. 2.9.1).
*
* If a method has its `ACC_ABSTRACT` flag set it must not have any of its
* `ACC_FINAL`, `ACC_NATIVE`, `ACC_PRIVATE`, `ACC_STATIC`, `ACC_STRICT`,
* or `ACC_SYNCHRONIZED` flags set (ch. 2.13.3.2).
*
* All interface methods must have their `ACC_ABSTRACT` and
* `ACC_PUBLIC` flags set.
*
* Note for future reference: see this thread on ACC_SUPER and
* how its enforcement differs on the android vm.
* https://groups.google.com/forum/?hl=en#!topic/jvm-languages/jVhzvq8-ZIk
*
*/ // Class Field Method
final val JAVA_ACC_PUBLIC = 0x0001 // X X X
final val JAVA_ACC_PRIVATE = 0x0002 // X X
final val JAVA_ACC_PROTECTED = 0x0004 // X X
final val JAVA_ACC_STATIC = 0x0008 // X X
final val JAVA_ACC_FINAL = 0x0010 // X X X
final val JAVA_ACC_SUPER = 0x0020 // X
final val JAVA_ACC_SYNCHRONIZED = 0x0020 // X
final val JAVA_ACC_VOLATILE = 0x0040 // X
final val JAVA_ACC_BRIDGE = 0x0040 // X
final val JAVA_ACC_TRANSIENT = 0x0080 // X
final val JAVA_ACC_VARARGS = 0x0080 // X
final val JAVA_ACC_NATIVE = 0x0100 // X
final val JAVA_ACC_INTERFACE = 0x0200 // X
final val JAVA_ACC_ABSTRACT = 0x0400 // X X
final val JAVA_ACC_STRICT = 0x0800 // X
final val JAVA_ACC_SYNTHETIC = 0x1000 // X X X
final val JAVA_ACC_ANNOTATION = 0x2000 // X
final val JAVA_ACC_ENUM = 0x4000 // X X
// tags describing the type of a literal in the constant pool
final val CONSTANT_UTF8 = 1
final val CONSTANT_UNICODE = 2
final val CONSTANT_INTEGER = 3
final val CONSTANT_FLOAT = 4
final val CONSTANT_LONG = 5
final val CONSTANT_DOUBLE = 6
final val CONSTANT_CLASS = 7
final val CONSTANT_STRING = 8
final val CONSTANT_FIELDREF = 9
final val CONSTANT_METHODREF = 10
final val CONSTANT_INTFMETHODREF = 11
final val CONSTANT_NAMEANDTYPE = 12
// tags describing the type of a literal in attribute values
final val BYTE_TAG = 'B'
final val CHAR_TAG = 'C'
final val DOUBLE_TAG = 'D'
final val FLOAT_TAG = 'F'
final val INT_TAG = 'I'
final val LONG_TAG = 'J'
final val SHORT_TAG = 'S'
final val BOOL_TAG = 'Z'
final val STRING_TAG = 's'
final val ENUM_TAG = 'e'
final val CLASS_TAG = 'c'
final val ARRAY_TAG = '['
final val VOID_TAG = 'V'
final val TVAR_TAG = 'T'
final val OBJECT_TAG = 'L'
final val ANNOTATION_TAG = '@'
final val SCALA_NOTHING = "scala.runtime.Nothing$"
final val SCALA_NULL = "scala.runtime.Null$"
// tags describing the type of newarray
final val T_BOOLEAN = 4
final val T_CHAR = 5
final val T_FLOAT = 6
final val T_DOUBLE = 7
final val T_BYTE = 8
final val T_SHORT = 9
final val T_INT = 10
final val T_LONG = 11
// JVM mnemonics
final val nop = 0x00
final val aconst_null = 0x01
final val iconst_m1 = 0x02
final val iconst_0 = 0x03
final val iconst_1 = 0x04
final val iconst_2 = 0x05
final val iconst_3 = 0x06
final val iconst_4 = 0x07
final val iconst_5 = 0x08
final val lconst_0 = 0x09
final val lconst_1 = 0x0a
final val fconst_0 = 0x0b
final val fconst_1 = 0x0c
final val fconst_2 = 0x0d
final val dconst_0 = 0x0e
final val dconst_1 = 0x0f
final val bipush = 0x10
final val sipush = 0x11
final val ldc = 0x12
final val ldc_w = 0x13
final val ldc2_w = 0x14
final val iload = 0x15
final val lload = 0x16
final val fload = 0x17
final val dload = 0x18
final val aload = 0x19
final val iload_0 = 0x1a
final val iload_1 = 0x1b
final val iload_2 = 0x1c
final val iload_3 = 0x1d
final val lload_0 = 0x1e
final val lload_1 = 0x1f
final val lload_2 = 0x20
final val lload_3 = 0x21
final val fload_0 = 0x22
final val fload_1 = 0x23
final val fload_2 = 0x24
final val fload_3 = 0x25
final val dload_0 = 0x26
final val dload_1 = 0x27
final val dload_2 = 0x28
final val dload_3 = 0x29
final val aload_0 = 0x2a
final val aload_1 = 0x2b
final val aload_2 = 0x2c
final val aload_3 = 0x2d
final val iaload = 0x2e
final val laload = 0x2f
final val faload = 0x30
final val daload = 0x31
final val aaload = 0x32
final val baload = 0x33
final val caload = 0x34
final val saload = 0x35
final val istore = 0x36
final val lstore = 0x37
final val fstore = 0x38
final val dstore = 0x39
final val astore = 0x3a
final val istore_0 = 0x3b
final val istore_1 = 0x3c
final val istore_2 = 0x3d
final val istore_3 = 0x3e
final val lstore_0 = 0x3f
final val lstore_1 = 0x40
final val lstore_2 = 0x41
final val lstore_3 = 0x42
final val fstore_0 = 0x43
final val fstore_1 = 0x44
final val fstore_2 = 0x45
final val fstore_3 = 0x46
final val dstore_0 = 0x47
final val dstore_1 = 0x48
final val dstore_2 = 0x49
final val dstore_3 = 0x4a
final val astore_0 = 0x4b
final val astore_1 = 0x4c
final val astore_2 = 0x4d
final val astore_3 = 0x4e
final val iastore = 0x4f
final val lastore = 0x50
final val fastore = 0x51
final val dastore = 0x52
final val aastore = 0x53
final val bastore = 0x54
final val castore = 0x55
final val sastore = 0x56
final val pop = 0x57
final val pop2 = 0x58
final val dup = 0x59
final val dup_x1 = 0x5a
final val dup_x2 = 0x5b
final val dup2 = 0x5c
final val dup2_x1 = 0x5d
final val dup2_x2 = 0x5e
final val swap = 0x5f
final val iadd = 0x60
final val ladd = 0x61
final val fadd = 0x62
final val dadd = 0x63
final val isub = 0x64
final val lsub = 0x65
final val fsub = 0x66
final val dsub = 0x67
final val imul = 0x68
final val lmul = 0x69
final val fmul = 0x6a
final val dmul = 0x6b
final val idiv = 0x6c
final val ldiv = 0x6d
final val fdiv = 0x6e
final val ddiv = 0x6f
final val irem = 0x70
final val lrem = 0x71
final val frem = 0x72
final val drem = 0x73
final val ineg = 0x74
final val lneg = 0x75
final val fneg = 0x76
final val dneg = 0x77
final val ishl = 0x78
final val lshl = 0x79
final val ishr = 0x7a
final val lshr = 0x7b
final val iushr = 0x7c
final val lushr = 0x7d
final val iand = 0x7e
final val land = 0x7f
final val ior = 0x80
final val lor = 0x81
final val ixor = 0x82
final val lxor = 0x83
final val iinc = 0x84
final val i2l = 0x85
final val i2f = 0x86
final val i2d = 0x87
final val l2i = 0x88
final val l2f = 0x89
final val l2d = 0x8a
final val f2i = 0x8b
final val f2l = 0x8c
final val f2d = 0x8d
final val d2i = 0x8e
final val d2l = 0x8f
final val d2f = 0x90
final val i2b = 0x91
final val i2c = 0x92
final val i2s = 0x93
final val lcmp = 0x94
final val fcmpl = 0x95
final val fcmpg = 0x96
final val dcmpl = 0x97
final val dcmpg = 0x98
final val ifeq = 0x99
final val ifne = 0x9a
final val iflt = 0x9b
final val ifge = 0x9c
final val ifgt = 0x9d
final val ifle = 0x9e
final val if_icmpeq = 0x9f
final val if_icmpne = 0xa0
final val if_icmplt = 0xa1
final val if_icmpge = 0xa2
final val if_icmpgt = 0xa3
final val if_icmple = 0xa4
final val if_acmpeq = 0xa5
final val if_acmpne = 0xa6
final val goto = 0xa7
final val jsr = 0xa8
final val ret = 0xa9
final val tableswitch = 0xaa
final val lookupswitch = 0xab
final val ireturn = 0xac
final val lreturn = 0xad
final val freturn = 0xae
final val dreturn = 0xaf
final val areturn = 0xb0
final val return_ = 0xb1
final val getstatic = 0xb2
final val putstatic = 0xb3
final val getfield = 0xb4
final val putfield = 0xb5
final val invokevirtual = 0xb6
final val invokespecial = 0xb7
final val invokestatic = 0xb8
final val invokeinterface = 0xb9
final val xxxunusedxxxx = 0xba
final val new_ = 0xbb
final val newarray = 0xbc
final val anewarray = 0xbd
final val arraylength = 0xbe
final val athrow = 0xbf
final val checkcast = 0xc0
final val instanceof = 0xc1
final val monitorenter = 0xc2
final val monitorexit = 0xc3
final val wide = 0xc4
final val multianewarray = 0xc5
final val ifnull = 0xc6
final val ifnonnull = 0xc7
final val goto_w = 0xc8
final val jsr_w = 0xc9
// reserved opcodes
final val breakpoint = 0xca
final val impdep1 = 0xfe
final val impdep2 = 0xff
abstract class FlagTranslation {
import Flags._
private var isAnnotation = false
private var isClass = false
private def initFields(flags: Int) = {
isAnnotation = (flags & JAVA_ACC_ANNOTATION) != 0
isClass = false
}
private def translateFlag(jflag: Int): Long = (jflag: @switch) match {
case JAVA_ACC_PRIVATE => PRIVATE
case JAVA_ACC_PROTECTED => PROTECTED
case JAVA_ACC_FINAL => FINAL
case JAVA_ACC_SYNTHETIC => SYNTHETIC
case JAVA_ACC_STATIC => STATIC
case JAVA_ACC_ABSTRACT => if (isAnnotation) 0L else if (isClass) ABSTRACT else DEFERRED
case JAVA_ACC_INTERFACE => if (isAnnotation) 0L else TRAIT | INTERFACE | ABSTRACT
case _ => 0L
}
private def translateFlags(jflags: Int, baseFlags: Long): Long = {
var res: Long = JAVA | baseFlags
/** fast, elegant, maintainable, pick any two... */
res |= translateFlag(jflags & JAVA_ACC_PRIVATE)
res |= translateFlag(jflags & JAVA_ACC_PROTECTED)
res |= translateFlag(jflags & JAVA_ACC_FINAL)
res |= translateFlag(jflags & JAVA_ACC_SYNTHETIC)
res |= translateFlag(jflags & JAVA_ACC_STATIC)
res |= translateFlag(jflags & JAVA_ACC_ABSTRACT)
res |= translateFlag(jflags & JAVA_ACC_INTERFACE)
res
}
def classFlags(jflags: Int): Long = {
initFields(jflags)
isClass = true
translateFlags(jflags, 0)
}
def fieldFlags(jflags: Int): Long = {
initFields(jflags)
translateFlags(jflags, if ((jflags & JAVA_ACC_FINAL) == 0) MUTABLE else 0)
}
def methodFlags(jflags: Int): Long = {
initFields(jflags)
translateFlags(jflags, if ((jflags & JAVA_ACC_BRIDGE) != 0) BRIDGE else 0)
}
}
object FlagTranslation extends FlagTranslation { }
def toScalaMethodFlags(flags: Int): Long = FlagTranslation methodFlags flags
def toScalaClassFlags(flags: Int): Long = FlagTranslation classFlags flags
def toScalaFieldFlags(flags: Int): Long = FlagTranslation fieldFlags flags
@deprecated("Use another method in this object", "2.10.0")
def toScalaFlags(flags: Int, isClass: Boolean = false, isField: Boolean = false): Long = (
if (isClass) toScalaClassFlags(flags)
else if (isField) toScalaFieldFlags(flags)
else toScalaMethodFlags(flags)
)
}