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Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically
embedded into Java applications to provide scripting to end users.
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript;
/**
* Additional interpreter-specific codes
*/
abstract class Icode {
static final int
// delete operator used on a name
Icode_DELNAME = 0,
// Stack: ... value1 -> ... value1 value1
Icode_DUP = -1,
// Stack: ... value2 value1 -> ... value2 value1 value2 value1
Icode_DUP2 = -2,
// Stack: ... value2 value1 -> ... value1 value2
Icode_SWAP = -3,
// Stack: ... value1 -> ...
Icode_POP = -4,
// Store stack top into return register and then pop it
Icode_POP_RESULT = -5,
// To jump conditionally and pop additional stack value
Icode_IFEQ_POP = -6,
// various types of ++/--
Icode_VAR_INC_DEC = -7,
Icode_NAME_INC_DEC = -8,
Icode_PROP_INC_DEC = -9,
Icode_ELEM_INC_DEC = -10,
Icode_REF_INC_DEC = -11,
// load/save scope from/to local
Icode_SCOPE_LOAD = -12,
Icode_SCOPE_SAVE = -13,
Icode_TYPEOFNAME = -14,
// helper for function calls
Icode_NAME_AND_THIS = -15,
Icode_PROP_AND_THIS = -16,
Icode_ELEM_AND_THIS = -17,
Icode_VALUE_AND_THIS = -18,
// Create closure object for nested functions
Icode_CLOSURE_EXPR = -19,
Icode_CLOSURE_STMT = -20,
// Special calls
Icode_CALLSPECIAL = -21,
// To return undefined value
Icode_RETUNDEF = -22,
// Exception handling implementation
Icode_GOSUB = -23,
Icode_STARTSUB = -24,
Icode_RETSUB = -25,
// To indicating a line number change in icodes.
Icode_LINE = -26,
// To store shorts and ints inline
Icode_SHORTNUMBER = -27,
Icode_INTNUMBER = -28,
// To create and populate array to hold values for [] and {} literals
Icode_LITERAL_NEW = -29,
Icode_LITERAL_SET = -30,
// Array literal with skipped index like [1,,2]
Icode_SPARE_ARRAYLIT = -31,
// Load index register to prepare for the following index operation
Icode_REG_IND_C0 = -32,
Icode_REG_IND_C1 = -33,
Icode_REG_IND_C2 = -34,
Icode_REG_IND_C3 = -35,
Icode_REG_IND_C4 = -36,
Icode_REG_IND_C5 = -37,
Icode_REG_IND1 = -38,
Icode_REG_IND2 = -39,
Icode_REG_IND4 = -40,
// Load string register to prepare for the following string operation
Icode_REG_STR_C0 = -41,
Icode_REG_STR_C1 = -42,
Icode_REG_STR_C2 = -43,
Icode_REG_STR_C3 = -44,
Icode_REG_STR1 = -45,
Icode_REG_STR2 = -46,
Icode_REG_STR4 = -47,
// Version of getvar/setvar that read var index directly from bytecode
Icode_GETVAR1 = -48,
Icode_SETVAR1 = -49,
// Load undefined
Icode_UNDEF = -50,
Icode_ZERO = -51,
Icode_ONE = -52,
// entrance and exit from .()
Icode_ENTERDQ = -53,
Icode_LEAVEDQ = -54,
Icode_TAIL_CALL = -55,
// Clear local to allow GC its context
Icode_LOCAL_CLEAR = -56,
// Literal get/set
Icode_LITERAL_GETTER = -57,
Icode_LITERAL_SETTER = -58,
// const
Icode_SETCONST = -59,
Icode_SETCONSTVAR = -60,
Icode_SETCONSTVAR1 = -61,
// Generator opcodes (along with Token.YIELD)
Icode_GENERATOR = -62,
Icode_GENERATOR_END = -63,
Icode_DEBUGGER = -64,
// Last icode
MIN_ICODE = -64;
static String bytecodeName(int bytecode)
{
if (!validBytecode(bytecode)) {
throw new IllegalArgumentException(String.valueOf(bytecode));
}
if (!Token.printICode) {
return String.valueOf(bytecode);
}
if (validTokenCode(bytecode)) {
return Token.name(bytecode);
}
switch (bytecode) {
case Icode_DUP: return "DUP";
case Icode_DUP2: return "DUP2";
case Icode_SWAP: return "SWAP";
case Icode_POP: return "POP";
case Icode_POP_RESULT: return "POP_RESULT";
case Icode_IFEQ_POP: return "IFEQ_POP";
case Icode_VAR_INC_DEC: return "VAR_INC_DEC";
case Icode_NAME_INC_DEC: return "NAME_INC_DEC";
case Icode_PROP_INC_DEC: return "PROP_INC_DEC";
case Icode_ELEM_INC_DEC: return "ELEM_INC_DEC";
case Icode_REF_INC_DEC: return "REF_INC_DEC";
case Icode_SCOPE_LOAD: return "SCOPE_LOAD";
case Icode_SCOPE_SAVE: return "SCOPE_SAVE";
case Icode_TYPEOFNAME: return "TYPEOFNAME";
case Icode_NAME_AND_THIS: return "NAME_AND_THIS";
case Icode_PROP_AND_THIS: return "PROP_AND_THIS";
case Icode_ELEM_AND_THIS: return "ELEM_AND_THIS";
case Icode_VALUE_AND_THIS: return "VALUE_AND_THIS";
case Icode_CLOSURE_EXPR: return "CLOSURE_EXPR";
case Icode_CLOSURE_STMT: return "CLOSURE_STMT";
case Icode_CALLSPECIAL: return "CALLSPECIAL";
case Icode_RETUNDEF: return "RETUNDEF";
case Icode_GOSUB: return "GOSUB";
case Icode_STARTSUB: return "STARTSUB";
case Icode_RETSUB: return "RETSUB";
case Icode_LINE: return "LINE";
case Icode_SHORTNUMBER: return "SHORTNUMBER";
case Icode_INTNUMBER: return "INTNUMBER";
case Icode_LITERAL_NEW: return "LITERAL_NEW";
case Icode_LITERAL_SET: return "LITERAL_SET";
case Icode_SPARE_ARRAYLIT: return "SPARE_ARRAYLIT";
case Icode_REG_IND_C0: return "REG_IND_C0";
case Icode_REG_IND_C1: return "REG_IND_C1";
case Icode_REG_IND_C2: return "REG_IND_C2";
case Icode_REG_IND_C3: return "REG_IND_C3";
case Icode_REG_IND_C4: return "REG_IND_C4";
case Icode_REG_IND_C5: return "REG_IND_C5";
case Icode_REG_IND1: return "LOAD_IND1";
case Icode_REG_IND2: return "LOAD_IND2";
case Icode_REG_IND4: return "LOAD_IND4";
case Icode_REG_STR_C0: return "REG_STR_C0";
case Icode_REG_STR_C1: return "REG_STR_C1";
case Icode_REG_STR_C2: return "REG_STR_C2";
case Icode_REG_STR_C3: return "REG_STR_C3";
case Icode_REG_STR1: return "LOAD_STR1";
case Icode_REG_STR2: return "LOAD_STR2";
case Icode_REG_STR4: return "LOAD_STR4";
case Icode_GETVAR1: return "GETVAR1";
case Icode_SETVAR1: return "SETVAR1";
case Icode_UNDEF: return "UNDEF";
case Icode_ZERO: return "ZERO";
case Icode_ONE: return "ONE";
case Icode_ENTERDQ: return "ENTERDQ";
case Icode_LEAVEDQ: return "LEAVEDQ";
case Icode_TAIL_CALL: return "TAIL_CALL";
case Icode_LOCAL_CLEAR: return "LOCAL_CLEAR";
case Icode_LITERAL_GETTER: return "LITERAL_GETTER";
case Icode_LITERAL_SETTER: return "LITERAL_SETTER";
case Icode_SETCONST: return "SETCONST";
case Icode_SETCONSTVAR: return "SETCONSTVAR";
case Icode_SETCONSTVAR1: return "SETCONSTVAR1";
case Icode_GENERATOR: return "GENERATOR";
case Icode_GENERATOR_END: return "GENERATOR_END";
case Icode_DEBUGGER: return "DEBUGGER";
}
// icode without name
throw new IllegalStateException(String.valueOf(bytecode));
}
static boolean validIcode(int icode)
{
return MIN_ICODE <= icode && icode <= 0;
}
static boolean validTokenCode(int token)
{
return Token.FIRST_BYTECODE_TOKEN <= token
&& token <= Token.LAST_BYTECODE_TOKEN;
}
static boolean validBytecode(int bytecode)
{
return validIcode(bytecode) || validTokenCode(bytecode);
}
}
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