@awayfl/avm2

import { assert } from '@awayjs/graphics'; import { release } from '@awayfl/swf-loader'; export const enum Bytecode { BKPT = 0x01, NOP = 0x02, THROW = 0x03, GETSUPER = 0x04, SETSUPER = 0x05, DXNS = 0x06, DXNSLATE = 0x07, KILL = 0x08, LABEL = 0x09, LF32X4 = 0x0A, SF32X4 = 0x0B, IFNLT = 0x0C, IFNLE = 0x0D, IFNGT = 0x0E, IFNGE = 0x0F, JUMP = 0x10, IFTRUE = 0x11, IFFALSE = 0x12, IFEQ = 0x13, IFNE = 0x14, IFLT = 0x15, IFLE = 0x16, IFGT = 0x17, IFGE = 0x18, IFSTRICTEQ = 0x19, IFSTRICTNE = 0x1A, LOOKUPSWITCH = 0x1B, PUSHWITH = 0x1C, POPSCOPE = 0x1D, NEXTNAME = 0x1E, HASNEXT = 0x1F, PUSHNULL = 0x20, PUSHUNDEFINED = 0x21, PUSHFLOAT = 0x22, NEXTVALUE = 0x23, PUSHBYTE = 0x24, PUSHSHORT = 0x25, PUSHTRUE = 0x26, PUSHFALSE = 0x27, PUSHNAN = 0x28, POP = 0x29, DUP = 0x2A, SWAP = 0x2B, PUSHSTRING = 0x2C, PUSHINT = 0x2D, PUSHUINT = 0x2E, PUSHDOUBLE = 0x2F, PUSHSCOPE = 0x30, PUSHNAMESPACE = 0x31, HASNEXT2 = 0x32, UNUSED_33 = 0x33, UNUSED_34 = 0x34, LI8 = 0x35, LI16 = 0x36, LI32 = 0x37, LF32 = 0x38, LF64 = 0x39, SI8 = 0x3A, SI16 = 0x3B, SI32 = 0x3C, SF32 = 0x3D, SF64 = 0x3E, UNUSED_3F = 0x3F, NEWFUNCTION = 0x40, CALL = 0x41, CONSTRUCT = 0x42, CALLMETHOD = 0x43, CALLSTATIC = 0x44, CALLSUPER = 0x45, CALLPROPERTY = 0x46, RETURNVOID = 0x47, RETURNVALUE = 0x48, CONSTRUCTSUPER = 0x49, CONSTRUCTPROP = 0x4A, CALLSUPERID = 0x4B, CALLPROPLEX = 0x4C, CALLINTERFACE = 0x4D, CALLSUPERVOID = 0x4E, CALLPROPVOID = 0x4F, SXI1 = 0x50, SXI8 = 0x51, SXI16 = 0x52, APPLYTYPE = 0x53, PUSHFLOAT4 = 0x54, NEWOBJECT = 0x55, NEWARRAY = 0x56, NEWACTIVATION = 0x57, NEWCLASS = 0x58, GETDESCENDANTS = 0x59, NEWCATCH = 0x5A, UNUSED_5B = 0x5B, UNUSED_5C = 0x5C, FINDPROPSTRICT = 0x5D, FINDPROPERTY = 0x5E, FINDDEF = 0x5F, GETLEX = 0x60, SETPROPERTY = 0x61, GETLOCAL = 0x62, SETLOCAL = 0x63, GETGLOBALSCOPE = 0x64, GETSCOPEOBJECT = 0x65, GETPROPERTY = 0x66, GETOUTERSCOPE = 0x67, INITPROPERTY = 0x68, UNUSED_69 = 0x69, DELETEPROPERTY = 0x6A, UNUSED_6B = 0x6B, GETSLOT = 0x6C, SETSLOT = 0x6D, GETGLOBALSLOT = 0x6E, SETGLOBALSLOT = 0x6F, CONVERT_S = 0x70, ESC_XELEM = 0x71, ESC_XATTR = 0x72, CONVERT_I = 0x73, CONVERT_U = 0x74, CONVERT_D = 0x75, CONVERT_B = 0x76, CONVERT_O = 0x77, CHECKFILTER = 0x78, CONVERT_F = 0x79, UNPLUS = 0x7a, CONVERT_F4 = 0x7b, BC_7C = 0x7c, BC_7D = 0x7d, BC_7E = 0x7e, BC_7F = 0x7f, COERCE = 0x80, COERCE_B = 0x81, COERCE_A = 0x82, COERCE_I = 0x83, COERCE_D = 0x84, COERCE_S = 0x85, ASTYPE = 0x86, ASTYPELATE = 0x87, COERCE_U = 0x88, COERCE_O = 0x89, UNUSED_8A = 0x8A, UNUSED_8B = 0x8B, UNUSED_8C = 0x8C, UNUSED_8D = 0x8D, UNUSED_8E = 0x8E, UNUSED_8F = 0x8F, NEGATE = 0x90, INCREMENT = 0x91, INCLOCAL = 0x92, DECREMENT = 0x93, DECLOCAL = 0x94, TYPEOF = 0x95, NOT = 0x96, BITNOT = 0x97, UNUSED_98 = 0x98, UNUSED_99 = 0x99, UNUSED_9A = 0x9A, UNUSED_9B = 0x9B, UNUSED_9C = 0x9C, UNUSED_9D = 0x9D, UNUSED_9E = 0x9E, UNUSED_9F = 0x9F, ADD = 0xA0, SUBTRACT = 0xA1, MULTIPLY = 0xA2, DIVIDE = 0xA3, MODULO = 0xA4, LSHIFT = 0xA5, RSHIFT = 0xA6, URSHIFT = 0xA7, BITAND = 0xA8, BITOR = 0xA9, BITXOR = 0xAA, EQUALS = 0xAB, STRICTEQUALS = 0xAC, LESSTHAN = 0xAD, LESSEQUALS = 0xAE, GREATERTHAN = 0xAF, GREATEREQUALS = 0xB0, INSTANCEOF = 0xB1, ISTYPE = 0xB2, ISTYPELATE = 0xB3, IN = 0xB4, UNUSED_B5 = 0xB5, UNUSED_B6 = 0xB6, UNUSED_B7 = 0xB7, UNUSED_B8 = 0xB8, UNUSED_B9 = 0xB9, UNUSED_BA = 0xBA, UNUSED_BB = 0xBB, UNUSED_BC = 0xBC, UNUSED_BD = 0xBD, UNUSED_BE = 0xBE, UNUSED_BF = 0xBF, INCREMENT_I = 0xC0, DECREMENT_I = 0xC1, INCLOCAL_I = 0xC2, DECLOCAL_I = 0xC3, NEGATE_I = 0xC4, ADD_I = 0xC5, SUBTRACT_I = 0xC6, MULTIPLY_I = 0xC7, UNUSED_C8 = 0xC8, UNUSED_C9 = 0xC9, UNUSED_CA = 0xCA, UNUSED_CB = 0xCB, UNUSED_CC = 0xCC, UNUSED_CD = 0xCD, UNUSED_CE = 0xCE, UNUSED_CF = 0xCF, GETLOCAL0 = 0xD0, GETLOCAL1 = 0xD1, GETLOCAL2 = 0xD2, GETLOCAL3 = 0xD3, SETLOCAL0 = 0xD4, SETLOCAL1 = 0xD5, SETLOCAL2 = 0xD6, SETLOCAL3 = 0xD7, UNUSED_D8 = 0xD8, UNUSED_D9 = 0xD9, UNUSED_DA = 0xDA, UNUSED_DB = 0xDB, UNUSED_DC = 0xDC, UNUSED_DD = 0xDD, UNUSED_DE = 0xDE, UNUSED_DF = 0xDF, UNUSED_E0 = 0xE0, UNUSED_E1 = 0xE1, UNUSED_E2 = 0xE2, UNUSED_E3 = 0xE3, UNUSED_E4 = 0xE4, UNUSED_E5 = 0xE5, UNUSED_E6 = 0xE6, UNUSED_E7 = 0xE7, UNUSED_E8 = 0xE8, UNUSED_E9 = 0xE9, UNUSED_EA = 0xEA, UNUSED_EB = 0xEB, UNUSED_EC = 0xEC, UNUSED_ED = 0xED, UNUSED_EE = 0xEE, INVALID = 0xED, DEBUG = 0xEF, DEBUGLINE = 0xF0, DEBUGFILE = 0xF1, BKPTLINE = 0xF2, TIMESTAMP = 0xF3, RESTARGC = 0xF4, RESTARG = 0xF5, UNUSED_F6 = 0xF6, UNUSED_F7 = 0xF7, UNUSED_F8 = 0xF8, UNUSED_F9 = 0xF9, UNUSED_FA = 0xFA, UNUSED_FB = 0xFB, UNUSED_FC = 0xFC, UNUSED_FD = 0xFD, UNUSED_FE = 0xFE, END = 0xFF } const bytecodeNames = [ '', 'BKPT', 'NOP', 'THROW', 'GETSUPER', 'SETSUPER', 'DXNS', 'DXNSLATE', 'KILL', 'LABEL', 'LF32X4', 'SF32X4', 'IFNLT', 'IFNLE', 'IFNGT', 'IFNGE', 'JUMP', 'IFTRUE', 'IFFALSE', 'IFEQ', 'IFNE', 'IFLT', 'IFLE', 'IFGT', 'IFGE', 'IFSTRICTEQ', 'IFSTRICTNE', 'LOOKUPSWITCH', 'PUSHWITH', 'POPSCOPE', 'NEXTNAME', 'HASNEXT', 'PUSHNULL', 'PUSHUNDEFINED', 'PUSHFLOAT', 'NEXTVALUE', 'PUSHBYTE', 'PUSHSHORT', 'PUSHTRUE', 'PUSHFALSE', 'PUSHNAN', 'POP', 'DUP', 'SWAP', 'PUSHSTRING', 'PUSHINT', 'PUSHUINT', 'PUSHDOUBLE', 'PUSHSCOPE', 'PUSHNAMESPACE', 'HASNEXT2', 'UNUSED_33', 'UNUSED_34', 'LI8', 'LI16', 'LI32', 'LF32', 'LF64', 'SI8', 'SI16', 'SI32', 'SF32', 'SF64', 'UNUSED_3F', 'NEWFUNCTION', 'CALL', 'CONSTRUCT', 'CALLMETHOD', 'CALLSTATIC', 'CALLSUPER', 'CALLPROPERTY', 'RETURNVOID', 'RETURNVALUE', 'CONSTRUCTSUPER', 'CONSTRUCTPROP', 'CALLSUPERID', 'CALLPROPLEX', 'CALLINTERFACE', 'CALLSUPERVOID', 'CALLPROPVOID', 'SXI1', 'SXI8', 'SXI16', 'APPLYTYPE', 'PUSHFLOAT4', 'NEWOBJECT', 'NEWARRAY', 'NEWACTIVATION', 'NEWCLASS', 'GETDESCENDANTS', 'NEWCATCH', 'UNUSED_5B', 'UNUSED_5C', 'FINDPROPSTRICT', 'FINDPROPERTY', 'FINDDEF', 'GETLEX', 'SETPROPERTY', 'GETLOCAL', 'SETLOCAL', 'GETGLOBALSCOPE', 'GETSCOPEOBJECT', 'GETPROPERTY', 'GETOUTERSCOPE', 'INITPROPERTY', 'UNUSED_69', 'DELETEPROPERTY', 'UNUSED_6B', 'GETSLOT', 'SETSLOT', 'GETGLOBALSLOT', 'SETGLOBALSLOT', 'CONVERT_S', 'ESC_XELEM', 'ESC_XATTR', 'CONVERT_I', 'CONVERT_U', 'CONVERT_D', 'CONVERT_B', 'CONVERT_O', 'CHECKFILTER', 'CONVERT_F', 'UNPLUS', 'CONVERT_F4', 'BC_7C', 'BC_7D', 'BC_7E', 'BC_7F', 'COERCE', 'COERCE_B', 'COERCE_A', 'COERCE_I', 'COERCE_D', 'COERCE_S', 'ASTYPE', 'ASTYPELATE', 'COERCE_U', 'COERCE_O', 'UNUSED_8A', 'UNUSED_8B', 'UNUSED_8C', 'UNUSED_8D', 'UNUSED_8E', 'UNUSED_8F', 'NEGATE', 'INCREMENT', 'INCLOCAL', 'DECREMENT', 'DECLOCAL', 'TYPEOF', 'NOT', 'BITNOT', 'UNUSED_98', 'UNUSED_99', 'UNUSED_9A', 'UNUSED_9B', 'UNUSED_9C', 'UNUSED_9D', 'UNUSED_9E', 'UNUSED_9F', 'ADD', 'SUBTRACT', 'MULTIPLY', 'DIVIDE', 'MODULO', 'LSHIFT', 'RSHIFT', 'URSHIFT', 'BITAND', 'BITOR', 'BITXOR', 'EQUALS', 'STRICTEQUALS', 'LESSTHAN', 'LESSEQUALS', 'GREATERTHAN', 'GREATEREQUALS', 'INSTANCEOF', 'ISTYPE', 'ISTYPELATE', 'IN', 'UNUSED_B5', 'UNUSED_B6', 'UNUSED_B7', 'UNUSED_B8', 'UNUSED_B9', 'UNUSED_BA', 'UNUSED_BB', 'UNUSED_BC', 'UNUSED_BD', 'UNUSED_BE', 'UNUSED_BF', 'INCREMENT_I', 'DECREMENT_I', 'INCLOCAL_I', 'DECLOCAL_I', 'NEGATE_I', 'ADD_I', 'SUBTRACT_I', 'MULTIPLY_I', 'UNUSED_C8', 'UNUSED_C9', 'UNUSED_CA', 'UNUSED_CB', 'UNUSED_CC', 'UNUSED_CD', 'UNUSED_CE', 'UNUSED_CF', 'GETLOCAL0', 'GETLOCAL1', 'GETLOCAL2', 'GETLOCAL3', 'SETLOCAL0', 'SETLOCAL1', 'SETLOCAL2', 'SETLOCAL3', 'UNUSED_D8', 'UNUSED_D9', 'UNUSED_DA', 'UNUSED_DB', 'UNUSED_DC', 'UNUSED_DD', 'UNUSED_DE', 'UNUSED_DF', 'UNUSED_E0', 'UNUSED_E1', 'UNUSED_E2', 'UNUSED_E3', 'UNUSED_E4', 'UNUSED_E5', 'UNUSED_E6', 'UNUSED_E7', 'UNUSED_E8', 'UNUSED_E9', 'UNUSED_EA', 'UNUSED_EB', 'UNUSED_EC', 'INVALID', 'UNUSED_EE', 'DEBUG', 'DEBUGLINE', 'DEBUGFILE', 'BKPTLINE', 'TIMESTAMP', 'RESTARGC', 'RESTARG', 'UNUSED_F6', 'UNUSED_F7', 'UNUSED_F8', 'UNUSED_F9', 'UNUSED_FA', 'UNUSED_FB', 'UNUSED_FC', 'UNUSED_FD', 'UNUSED_FE', 'END']; export function getBytecodeName(bytecode: Bytecode): string { return release ? 'Bytecode: ' + bytecode : bytecodeNames[bytecode]; } const enum Flags { NONE = 0x000, STOP = 0x001, FALL_THROUGH = 0x002, BRANCH = 0x004, CAN_THROW = 0x008, RETURN = 0x010 } /** * A array that maps from a bytecode value to the set of {@link OPFlags} for the corresponding instruction. */ export const BytecodeFlags = new Uint32Array(256); export const BytecodeFormat = new Array(256); function define(bytecode: Bytecode, format: string, flags: Flags = 0) { BytecodeFlags[bytecode] = flags; BytecodeFormat[bytecode] = format; } /** * Only call this before the compiler is used. */ export function defineBytecodes() { define(Bytecode.BKPT, ''); define(Bytecode.NOP, ''); define(Bytecode.THROW, ''); define(Bytecode.GETSUPER, 'e'); define(Bytecode.SETSUPER, 'e'); define(Bytecode.DXNS, 'e'); define(Bytecode.DXNSLATE, ''); define(Bytecode.KILL, 'e'); define(Bytecode.LABEL, ''); define(Bytecode.LF32X4, ''); define(Bytecode.SF32X4, ''); define(Bytecode.IFNLT, 'd'); define(Bytecode.IFNLE, 'd'); define(Bytecode.IFNGT, 'd'); define(Bytecode.IFNGE, 'd'); define(Bytecode.JUMP, 'd'); define(Bytecode.IFTRUE, 'd'); define(Bytecode.IFFALSE, 'd'); define(Bytecode.IFEQ, 'd'); define(Bytecode.IFNE, 'd'); define(Bytecode.IFLT, 'd'); define(Bytecode.IFLE, 'd'); define(Bytecode.IFGT, 'd'); define(Bytecode.IFGE, 'd'); define(Bytecode.IFSTRICTEQ, 'd'); define(Bytecode.IFSTRICTNE, 'd'); define(Bytecode.LOOKUPSWITCH, ''); define(Bytecode.PUSHWITH, ''); define(Bytecode.POPSCOPE, ''); define(Bytecode.NEXTNAME, ''); define(Bytecode.HASNEXT, ''); define(Bytecode.PUSHNULL, ''); define(Bytecode.PUSHUNDEFINED, ''); define(Bytecode.NEXTVALUE, ''); define(Bytecode.PUSHBYTE, 'b'); define(Bytecode.PUSHSHORT, 'c'); define(Bytecode.PUSHTRUE, ''); define(Bytecode.PUSHFALSE, ''); define(Bytecode.PUSHNAN, ''); define(Bytecode.POP, ''); define(Bytecode.DUP, ''); define(Bytecode.SWAP, ''); define(Bytecode.PUSHSTRING, 'e'); define(Bytecode.PUSHINT, 'e'); define(Bytecode.PUSHUINT, 'e'); define(Bytecode.PUSHDOUBLE, 'e'); define(Bytecode.PUSHSCOPE, ''); define(Bytecode.PUSHNAMESPACE, 'e'); define(Bytecode.HASNEXT2, 'ee'); // define(Bytecode.UNDEFINED, ""); // define(Bytecode.UNDEFINED, ""); define(Bytecode.LI8, ''); define(Bytecode.LI16, ''); define(Bytecode.LI32, ''); define(Bytecode.LF32, ''); define(Bytecode.LF64, ''); define(Bytecode.SI8, ''); define(Bytecode.SI16, ''); define(Bytecode.SI32, ''); define(Bytecode.SF32, ''); define(Bytecode.SF64, ''); define(Bytecode.NEWFUNCTION, 'e'); define(Bytecode.CALL, 'e'); define(Bytecode.CONSTRUCT, 'e'); define(Bytecode.CALLMETHOD, 'ee'); define(Bytecode.CALLSTATIC, 'ee'); define(Bytecode.CALLSUPER, 'ee'); define(Bytecode.CALLPROPERTY, 'ee'); define(Bytecode.RETURNVOID, ''); define(Bytecode.RETURNVALUE, ''); define(Bytecode.CONSTRUCTSUPER, 'e'); define(Bytecode.CONSTRUCTPROP, 'ee'); define(Bytecode.CALLSUPERID, ''); define(Bytecode.CALLPROPLEX, 'ee'); define(Bytecode.CALLINTERFACE, ''); define(Bytecode.CALLSUPERVOID, 'ee'); define(Bytecode.CALLPROPVOID, 'ee'); define(Bytecode.SXI1, ''); define(Bytecode.SXI8, ''); define(Bytecode.SXI16, ''); define(Bytecode.APPLYTYPE, 'e'); define(Bytecode.PUSHFLOAT4, ''); define(Bytecode.NEWOBJECT, 'e'); define(Bytecode.NEWARRAY, 'e'); define(Bytecode.NEWACTIVATION, ''); define(Bytecode.NEWCLASS, 'e'); define(Bytecode.GETDESCENDANTS, 'e'); define(Bytecode.NEWCATCH, 'e'); // define(Bytecode.UNDEFINED, ""); // define(Bytecode.UNDEFINED, ""); define(Bytecode.FINDPROPSTRICT, 'e'); define(Bytecode.FINDPROPERTY, 'e'); define(Bytecode.FINDDEF, ''); define(Bytecode.GETLEX, 'e'); define(Bytecode.SETPROPERTY, 'e'); define(Bytecode.GETLOCAL, 'e'); define(Bytecode.SETLOCAL, 'e'); define(Bytecode.GETGLOBALSCOPE, ''); define(Bytecode.GETSCOPEOBJECT, 'e'); define(Bytecode.GETPROPERTY, 'e'); define(Bytecode.GETOUTERSCOPE, ''); define(Bytecode.INITPROPERTY, 'e'); define(Bytecode.DELETEPROPERTY, 'e'); define(Bytecode.GETSLOT, 'e'); define(Bytecode.SETSLOT, 'e'); define(Bytecode.GETGLOBALSLOT, 'e'); define(Bytecode.SETGLOBALSLOT, 'e'); define(Bytecode.CONVERT_S, ''); define(Bytecode.ESC_XELEM, ''); define(Bytecode.ESC_XATTR, ''); define(Bytecode.CONVERT_I, ''); define(Bytecode.CONVERT_U, ''); define(Bytecode.CONVERT_D, ''); define(Bytecode.CONVERT_B, ''); define(Bytecode.CONVERT_O, ''); define(Bytecode.CHECKFILTER, ''); define(Bytecode.CONVERT_F, ''); define(Bytecode.UNPLUS, ''); define(Bytecode.CONVERT_F4, ''); define(Bytecode.COERCE, 'e'); define(Bytecode.COERCE_B, ''); define(Bytecode.COERCE_A, ''); define(Bytecode.COERCE_I, ''); define(Bytecode.COERCE_D, ''); define(Bytecode.COERCE_S, ''); define(Bytecode.ASTYPE, 'e'); define(Bytecode.ASTYPELATE, ''); define(Bytecode.COERCE_U, ''); define(Bytecode.COERCE_O, ''); define(Bytecode.NEGATE, ''); define(Bytecode.INCREMENT, ''); define(Bytecode.INCLOCAL, 'e'); define(Bytecode.DECREMENT, ''); define(Bytecode.DECLOCAL, 'e'); define(Bytecode.TYPEOF, ''); define(Bytecode.NOT, ''); define(Bytecode.BITNOT, ''); define(Bytecode.ADD, ''); define(Bytecode.SUBTRACT, ''); define(Bytecode.MULTIPLY, ''); define(Bytecode.DIVIDE, ''); define(Bytecode.MODULO, ''); define(Bytecode.LSHIFT, ''); define(Bytecode.RSHIFT, ''); define(Bytecode.URSHIFT, ''); define(Bytecode.BITAND, ''); define(Bytecode.BITOR, ''); define(Bytecode.BITXOR, ''); define(Bytecode.EQUALS, ''); define(Bytecode.STRICTEQUALS, ''); define(Bytecode.LESSTHAN, ''); define(Bytecode.LESSEQUALS, ''); define(Bytecode.GREATERTHAN, ''); define(Bytecode.GREATEREQUALS, ''); define(Bytecode.INSTANCEOF, ''); define(Bytecode.ISTYPE, 'e'); define(Bytecode.ISTYPELATE, ''); define(Bytecode.IN, ''); define(Bytecode.INCREMENT_I, ''); define(Bytecode.DECREMENT_I, ''); define(Bytecode.INCLOCAL_I, 'e'); define(Bytecode.DECLOCAL_I, 'e'); define(Bytecode.NEGATE_I, ''); define(Bytecode.ADD_I, ''); define(Bytecode.SUBTRACT_I, ''); define(Bytecode.MULTIPLY_I, ''); define(Bytecode.GETLOCAL0, ''); define(Bytecode.GETLOCAL1, ''); define(Bytecode.GETLOCAL2, ''); define(Bytecode.GETLOCAL3, ''); define(Bytecode.SETLOCAL0, ''); define(Bytecode.SETLOCAL1, ''); define(Bytecode.SETLOCAL2, ''); define(Bytecode.SETLOCAL3, ''); define(Bytecode.INVALID, ''); define(Bytecode.DEBUG, 'aeae'); define(Bytecode.DEBUGLINE, 'e'); define(Bytecode.DEBUGFILE, 'e'); define(Bytecode.BKPTLINE, 'e'); define(Bytecode.TIMESTAMP, ''); // define(Bytecode.UNUSED_6B, "", Flags.NONE); // define(Bytecode.UNUSED_DE, "", Flags.NONE); // define(Bytecode.UNUSED_BB, "", Flags.NONE); } defineBytecodes(); export class Bytes { static u8(code: Uint8Array, i: number): number { return code[i]; } static s32(code: Uint8Array, i: number): number { let result = code[i]; if (result & 0x80) { result = result & 0x7f | code[i + 1] << 7; if (result & 0x4000) { result = result & 0x3fff | code[i + 2] << 14; if (result & 0x200000) { result = result & 0x1fffff | code[i + 3] << 21; if (result & 0x10000000) { result = result & 0x0fffffff | code[i + 4] << 28; result = result & 0xffffffff; } } } } return result; } static u32(code: Uint8Array, i: number): number { return Bytes.s32(code, i) >>> 0; } static u30(code: Uint8Array, i: number): number { return Bytes.u32(code, i); } static s32Length(code: Uint8Array, i: number): number { let result = code[i]; if (result & 0x80) { result = result & 0x7f | code[i + 1] << 7; if (result & 0x4000) { result = result & 0x3fff | code[i + 2] << 14; if (result & 0x200000) { result = result & 0x1fffff | code[i + 3] << 21; if (result & 0x10000000) { return 5; } return 4; } return 3; } return 2; } return 1; } } export const enum Sizes { u08 = 0, s08, s16, s24, u30, u32 } function lengthAt(code: Uint8Array, i: number): number { let l = 1; const bytecode = code[i]; if (bytecode === Bytecode.LOOKUPSWITCH) { l += 3; // Default offset. const n = Bytes.u30(code, i + l) + 1; // Offsets l += Bytes.s32Length(code, i + l); l += n * 3; return l; } const format = BytecodeFormat[bytecode]; if (format === '') { return l; } assert(format, 'OP: ' + getBytecodeName(bytecode)); for (let j = 0; j < format.length; j++) { const f = format[j].charCodeAt(0) - 97; switch (f) { case Sizes.u08: case Sizes.s08: l += 1; continue; case Sizes.s24: l += 3; continue; case Sizes.s16: case Sizes.u30: case Sizes.u32: l += Bytes.s32Length(code, i + l); continue; } } return l; } export class BytecodeStream { private _code: Uint8Array; private _bytecode: Bytecode; private _currentBCI: number; private _nextBCI: number; constructor(code: Uint8Array) { this._code = code; this.setBCI(0); } public next() { this.setBCI(this._nextBCI); } public endBCI(): number { return this._code.length; } public get nextBCI(): number { return this._nextBCI; } public get currentBCI(): number { return this._currentBCI; } public currentBytecode(): Bytecode { return this._bytecode; } public nextBC(): Bytecode { return Bytes.u8(this._code, this._nextBCI); } public setBCI(bci: number) { this._currentBCI = bci; if (this._currentBCI < this._code.length) { this._bytecode = Bytes.u8(this._code, bci); const l = lengthAt(this._code, bci); this._nextBCI = bci + l; } else { this._bytecode = Bytecode.END; this._nextBCI = this._currentBCI; } } }