1 """ttLib.tables.ttProgram.py -- Assembler/disassembler for TrueType bytecode programs.""" 2 3 from __future__ import print_function, division, absolute_import 4 from fontTools.misc.py23 import * 5 from fontTools.misc.textTools import num2binary, binary2num, readHex 6 import array 7 import re 8 import logging 9 10 11 log = logging.getLogger(__name__) 12 13 # first, the list of instructions that eat bytes or words from the instruction stream 14 15 streamInstructions = [ 16 # 17 # opcode mnemonic argBits descriptive name pops pushes eats from instruction stream pushes 18 # 19 (0x40, 'NPUSHB', 0, 'PushNBytes', 0, -1), # n, b1, b2,...bn b1,b2...bn 20 (0x41, 'NPUSHW', 0, 'PushNWords', 0, -1), # n, w1, w2,...w w1,w2...wn 21 (0xb0, 'PUSHB', 3, 'PushBytes', 0, -1), # b0, b1,..bn b0, b1, ...,bn 22 (0xb8, 'PUSHW', 3, 'PushWords', 0, -1), # w0,w1,..wn w0 ,w1, ...wn 23 ] 24 25 26 # next, the list of "normal" instructions 27 28 instructions = [ 29 # 30 #, opcode mnemonic argBits descriptive name pops pushes eats from instruction stream pushes 31 # 32 (0x7f, 'AA', 0, 'AdjustAngle', 1, 0), # p - 33 (0x64, 'ABS', 0, 'Absolute', 1, 1), # n |n| 34 (0x60, 'ADD', 0, 'Add', 2, 1), # n2, n1 (n1 + n2) 35 (0x27, 'ALIGNPTS', 0, 'AlignPts', 2, 0), # p2, p1 - 36 (0x3c, 'ALIGNRP', 0, 'AlignRelativePt', -1, 0), # p1, p2, ... , ploopvalue - 37 (0x5a, 'AND', 0, 'LogicalAnd', 2, 1), # e2, e1 b 38 (0x2b, 'CALL', 0, 'CallFunction', 1, 0), # f - 39 (0x67, 'CEILING', 0, 'Ceiling', 1, 1), # n ceil(n) 40 (0x25, 'CINDEX', 0, 'CopyXToTopStack', 1, 1), # k ek 41 (0x22, 'CLEAR', 0, 'ClearStack', -1, 0), # all items on the stack - 42 (0x4f, 'DEBUG', 0, 'DebugCall', 1, 0), # n - 43 (0x73, 'DELTAC1', 0, 'DeltaExceptionC1', -1, 0), # argn, cn, argn-1,cn-1, , arg1, c1 - 44 (0x74, 'DELTAC2', 0, 'DeltaExceptionC2', -1, 0), # argn, cn, argn-1,cn-1, , arg1, c1 - 45 (0x75, 'DELTAC3', 0, 'DeltaExceptionC3', -1, 0), # argn, cn, argn-1,cn-1, , arg1, c1 - 46 (0x5d, 'DELTAP1', 0, 'DeltaExceptionP1', -1, 0), # argn, pn, argn-1, pn-1, , arg1, p1 - 47 (0x71, 'DELTAP2', 0, 'DeltaExceptionP2', -1, 0), # argn, pn, argn-1, pn-1, , arg1, p1 - 48 (0x72, 'DELTAP3', 0, 'DeltaExceptionP3', -1, 0), # argn, pn, argn-1, pn-1, , arg1, p1 - 49 (0x24, 'DEPTH', 0, 'GetDepthStack', 0, 1), # - n 50 (0x62, 'DIV', 0, 'Divide', 2, 1), # n2, n1 (n1 * 64)/ n2 51 (0x20, 'DUP', 0, 'DuplicateTopStack', 1, 2), # e e, e 52 (0x59, 'EIF', 0, 'EndIf', 0, 0), # - - 53 (0x1b, 'ELSE', 0, 'Else', 0, 0), # - - 54 (0x2d, 'ENDF', 0, 'EndFunctionDefinition', 0, 0), # - - 55 (0x54, 'EQ', 0, 'Equal', 2, 1), # e2, e1 b 56 (0x57, 'EVEN', 0, 'Even', 1, 1), # e b 57 (0x2c, 'FDEF', 0, 'FunctionDefinition', 1, 0), # f - 58 (0x4e, 'FLIPOFF', 0, 'SetAutoFlipOff', 0, 0), # - - 59 (0x4d, 'FLIPON', 0, 'SetAutoFlipOn', 0, 0), # - - 60 (0x80, 'FLIPPT', 0, 'FlipPoint', -1, 0), # p1, p2, ..., ploopvalue - 61 (0x82, 'FLIPRGOFF', 0, 'FlipRangeOff', 2, 0), # h, l - 62 (0x81, 'FLIPRGON', 0, 'FlipRangeOn', 2, 0), # h, l - 63 (0x66, 'FLOOR', 0, 'Floor', 1, 1), # n floor(n) 64 (0x46, 'GC', 1, 'GetCoordOnPVector', 1, 1), # p c 65 (0x88, 'GETINFO', 0, 'GetInfo', 1, 1), # selector result 66 (0x91, 'GETVARIATION', 0, 'GetVariation', 0, -1), # - a1,..,an 67 (0x0d, 'GFV', 0, 'GetFVector', 0, 2), # - px, py 68 (0x0c, 'GPV', 0, 'GetPVector', 0, 2), # - px, py 69 (0x52, 'GT', 0, 'GreaterThan', 2, 1), # e2, e1 b 70 (0x53, 'GTEQ', 0, 'GreaterThanOrEqual', 2, 1), # e2, e1 b 71 (0x89, 'IDEF', 0, 'InstructionDefinition', 1, 0), # f - 72 (0x58, 'IF', 0, 'If', 1, 0), # e - 73 (0x8e, 'INSTCTRL', 0, 'SetInstrExecControl', 2, 0), # s, v - 74 (0x39, 'IP', 0, 'InterpolatePts', -1, 0), # p1, p2, ... , ploopvalue - 75 (0x0f, 'ISECT', 0, 'MovePtToIntersect', 5, 0), # a1, a0, b1, b0, p - 76 (0x30, 'IUP', 1, 'InterpolateUntPts', 0, 0), # - - 77 (0x1c, 'JMPR', 0, 'Jump', 1, 0), # offset - 78 (0x79, 'JROF', 0, 'JumpRelativeOnFalse', 2, 0), # e, offset - 79 (0x78, 'JROT', 0, 'JumpRelativeOnTrue', 2, 0), # e, offset - 80 (0x2a, 'LOOPCALL', 0, 'LoopAndCallFunction', 2, 0), # f, count - 81 (0x50, 'LT', 0, 'LessThan', 2, 1), # e2, e1 b 82 (0x51, 'LTEQ', 0, 'LessThenOrEqual', 2, 1), # e2, e1 b 83 (0x8b, 'MAX', 0, 'Maximum', 2, 1), # e2, e1 max(e1, e2) 84 (0x49, 'MD', 1, 'MeasureDistance', 2, 1), # p2,p1 d 85 (0x2e, 'MDAP', 1, 'MoveDirectAbsPt', 1, 0), # p - 86 (0xc0, 'MDRP', 5, 'MoveDirectRelPt', 1, 0), # p - 87 (0x3e, 'MIAP', 1, 'MoveIndirectAbsPt', 2, 0), # n, p - 88 (0x8c, 'MIN', 0, 'Minimum', 2, 1), # e2, e1 min(e1, e2) 89 (0x26, 'MINDEX', 0, 'MoveXToTopStack', 1, 1), # k ek 90 (0xe0, 'MIRP', 5, 'MoveIndirectRelPt', 2, 0), # n, p - 91 (0x4b, 'MPPEM', 0, 'MeasurePixelPerEm', 0, 1), # - ppem 92 (0x4c, 'MPS', 0, 'MeasurePointSize', 0, 1), # - pointSize 93 (0x3a, 'MSIRP', 1, 'MoveStackIndirRelPt', 2, 0), # d, p - 94 (0x63, 'MUL', 0, 'Multiply', 2, 1), # n2, n1 (n1 * n2)/64 95 (0x65, 'NEG', 0, 'Negate', 1, 1), # n -n 96 (0x55, 'NEQ', 0, 'NotEqual', 2, 1), # e2, e1 b 97 (0x5c, 'NOT', 0, 'LogicalNot', 1, 1), # e ( not e ) 98 (0x6c, 'NROUND', 2, 'NoRound', 1, 1), # n1 n2 99 (0x56, 'ODD', 0, 'Odd', 1, 1), # e b 100 (0x5b, 'OR', 0, 'LogicalOr', 2, 1), # e2, e1 b 101 (0x21, 'POP', 0, 'PopTopStack', 1, 0), # e - 102 (0x45, 'RCVT', 0, 'ReadCVT', 1, 1), # location value 103 (0x7d, 'RDTG', 0, 'RoundDownToGrid', 0, 0), # - - 104 (0x7a, 'ROFF', 0, 'RoundOff', 0, 0), # - - 105 (0x8a, 'ROLL', 0, 'RollTopThreeStack', 3, 3), # a,b,c b,a,c 106 (0x68, 'ROUND', 2, 'Round', 1, 1), # n1 n2 107 (0x43, 'RS', 0, 'ReadStore', 1, 1), # n v 108 (0x3d, 'RTDG', 0, 'RoundToDoubleGrid', 0, 0), # - - 109 (0x18, 'RTG', 0, 'RoundToGrid', 0, 0), # - - 110 (0x19, 'RTHG', 0, 'RoundToHalfGrid', 0, 0), # - - 111 (0x7c, 'RUTG', 0, 'RoundUpToGrid', 0, 0), # - - 112 (0x77, 'S45ROUND', 0, 'SuperRound45Degrees', 1, 0), # n - 113 (0x7e, 'SANGW', 0, 'SetAngleWeight', 1, 0), # weight - 114 (0x85, 'SCANCTRL', 0, 'ScanConversionControl', 1, 0), # n - 115 (0x8d, 'SCANTYPE', 0, 'ScanType', 1, 0), # n - 116 (0x48, 'SCFS', 0, 'SetCoordFromStackFP', 2, 0), # c, p - 117 (0x1d, 'SCVTCI', 0, 'SetCVTCutIn', 1, 0), # n - 118 (0x5e, 'SDB', 0, 'SetDeltaBaseInGState', 1, 0), # n - 119 (0x86, 'SDPVTL', 1, 'SetDualPVectorToLine', 2, 0), # p2, p1 - 120 (0x5f, 'SDS', 0, 'SetDeltaShiftInGState',1, 0), # n - 121 (0x0b, 'SFVFS', 0, 'SetFVectorFromStack', 2, 0), # y, x - 122 (0x04, 'SFVTCA', 1, 'SetFVectorToAxis', 0, 0), # - - 123 (0x08, 'SFVTL', 1, 'SetFVectorToLine', 2, 0), # p2, p1 - 124 (0x0e, 'SFVTPV', 0, 'SetFVectorToPVector', 0, 0), # - - 125 (0x34, 'SHC', 1, 'ShiftContourByLastPt', 1, 0), # c - 126 (0x32, 'SHP', 1, 'ShiftPointByLastPoint',-1, 0), # p1, p2, ..., ploopvalue - 127 (0x38, 'SHPIX', 0, 'ShiftZoneByPixel', -1, 0), # d, p1, p2, ..., ploopvalue - 128 (0x36, 'SHZ', 1, 'ShiftZoneByLastPoint', 1, 0), # e - 129 (0x17, 'SLOOP', 0, 'SetLoopVariable', 1, 0), # n - 130 (0x1a, 'SMD', 0, 'SetMinimumDistance', 1, 0), # distance - 131 (0x0a, 'SPVFS', 0, 'SetPVectorFromStack', 2, 0), # y, x - 132 (0x02, 'SPVTCA', 1, 'SetPVectorToAxis', 0, 0), # - - 133 (0x06, 'SPVTL', 1, 'SetPVectorToLine', 2, 0), # p2, p1 - 134 (0x76, 'SROUND', 0, 'SuperRound', 1, 0), # n - 135 (0x10, 'SRP0', 0, 'SetRefPoint0', 1, 0), # p - 136 (0x11, 'SRP1', 0, 'SetRefPoint1', 1, 0), # p - 137 (0x12, 'SRP2', 0, 'SetRefPoint2', 1, 0), # p - 138 (0x1f, 'SSW', 0, 'SetSingleWidth', 1, 0), # n - 139 (0x1e, 'SSWCI', 0, 'SetSingleWidthCutIn', 1, 0), # n - 140 (0x61, 'SUB', 0, 'Subtract', 2, 1), # n2, n1 (n1 - n2) 141 (0x00, 'SVTCA', 1, 'SetFPVectorToAxis', 0, 0), # - - 142 (0x23, 'SWAP', 0, 'SwapTopStack', 2, 2), # e2, e1 e1, e2 143 (0x13, 'SZP0', 0, 'SetZonePointer0', 1, 0), # n - 144 (0x14, 'SZP1', 0, 'SetZonePointer1', 1, 0), # n - 145 (0x15, 'SZP2', 0, 'SetZonePointer2', 1, 0), # n - 146 (0x16, 'SZPS', 0, 'SetZonePointerS', 1, 0), # n - 147 (0x29, 'UTP', 0, 'UnTouchPt', 1, 0), # p - 148 (0x70, 'WCVTF', 0, 'WriteCVTInFUnits', 2, 0), # n, l - 149 (0x44, 'WCVTP', 0, 'WriteCVTInPixels', 2, 0), # v, l - 150 (0x42, 'WS', 0, 'WriteStore', 2, 0), # v, l - 151 ] 152 153 154 def bitRepr(value, bits): 155 s = "" 156 for i in range(bits): 157 s = "01"[value & 0x1] + s 158 value = value >> 1 159 return s 160 161 162 _mnemonicPat = re.compile(r"[A-Z][A-Z0-9]*$") 163 164 def _makeDict(instructionList): 165 opcodeDict = {} 166 mnemonicDict = {} 167 for op, mnemonic, argBits, name, pops, pushes in instructionList: 168 assert _mnemonicPat.match(mnemonic) 169 mnemonicDict[mnemonic] = op, argBits, name 170 if argBits: 171 argoffset = op 172 for i in range(1 << argBits): 173 opcodeDict[op+i] = mnemonic, argBits, argoffset, name 174 else: 175 opcodeDict[op] = mnemonic, 0, 0, name 176 return opcodeDict, mnemonicDict 177 178 streamOpcodeDict, streamMnemonicDict = _makeDict(streamInstructions) 179 opcodeDict, mnemonicDict = _makeDict(instructions) 180 181 class tt_instructions_error(Exception): 182 def __init__(self, error): 183 self.error = error 184 def __str__(self): 185 return "TT instructions error: %s" % repr(self.error) 186 187 188 _comment = r"/\*.*?\*/" 189 _instruction = r"([A-Z][A-Z0-9]*)\s*\[(.*?)\]" 190 _number = r"-?[0-9]+" 191 _token = "(%s)|(%s)|(%s)" % (_instruction, _number, _comment) 192 193 _tokenRE = re.compile(_token) 194 _whiteRE = re.compile(r"\s*") 195 196 _pushCountPat = re.compile(r"[A-Z][A-Z0-9]*\s*\[.*?\]\s*/\* ([0-9]+).*?\*/") 197 198 _indentRE = re.compile(r"^FDEF|IF|ELSE\[ \]\t.+") 199 _unindentRE = re.compile(r"^ELSE|ENDF|EIF\[ \]\t.+") 200 201 def _skipWhite(data, pos): 202 m = _whiteRE.match(data, pos) 203 newPos = m.regs[0][1] 204 assert newPos >= pos 205 return newPos 206 207 208 class Program(object): 209 210 def __init__(self): 211 pass 212 213 def fromBytecode(self, bytecode): 214 self.bytecode = array.array("B", bytecode) 215 if hasattr(self, "assembly"): 216 del self.assembly 217 218 def fromAssembly(self, assembly): 219 self.assembly = assembly 220 if hasattr(self, "bytecode"): 221 del self.bytecode 222 223 def getBytecode(self): 224 if not hasattr(self, "bytecode"): 225 self._assemble() 226 return self.bytecode.tostring() 227 228 def getAssembly(self, preserve=True): 229 if not hasattr(self, "assembly"): 230 self._disassemble(preserve=preserve) 231 return self.assembly 232 233 def toXML(self, writer, ttFont): 234 if not hasattr (ttFont, "disassembleInstructions") or ttFont.disassembleInstructions: 235 try: 236 assembly = self.getAssembly() 237 except: 238 import traceback 239 tmp = StringIO() 240 traceback.print_exc(file=tmp) 241 msg = "An exception occurred during the decompilation of glyph program:\n\n" 242 msg += tmp.getvalue() 243 log.error(msg) 244 writer.begintag("bytecode") 245 writer.newline() 246 writer.comment(msg.strip()) 247 writer.newline() 248 writer.dumphex(self.getBytecode()) 249 writer.endtag("bytecode") 250 writer.newline() 251 else: 252 if not assembly: 253 return 254 writer.begintag("assembly") 255 writer.newline() 256 i = 0 257 indent = 0 258 nInstr = len(assembly) 259 while i < nInstr: 260 instr = assembly[i] 261 if _unindentRE.match(instr): 262 indent -= 1 263 writer.write(writer.indentwhite * indent) 264 writer.write(instr) 265 writer.newline() 266 m = _pushCountPat.match(instr) 267 i = i + 1 268 if m: 269 nValues = int(m.group(1)) 270 line = [] 271 j = 0 272 for j in range(nValues): 273 if j and not (j % 25): 274 writer.write(writer.indentwhite * indent) 275 writer.write(' '.join(line)) 276 writer.newline() 277 line = [] 278 line.append(assembly[i+j]) 279 writer.write(writer.indentwhite * indent) 280 writer.write(' '.join(line)) 281 writer.newline() 282 i = i + j + 1 283 if _indentRE.match(instr): 284 indent += 1 285 writer.endtag("assembly") 286 writer.newline() 287 else: 288 bytecode = self.getBytecode() 289 if not bytecode: 290 return 291 writer.begintag("bytecode") 292 writer.newline() 293 writer.dumphex(bytecode) 294 writer.endtag("bytecode") 295 writer.newline() 296 297 def fromXML(self, name, attrs, content, ttFont): 298 if name == "assembly": 299 self.fromAssembly(strjoin(content)) 300 self._assemble() 301 del self.assembly 302 else: 303 assert name == "bytecode" 304 self.fromBytecode(readHex(content)) 305 306 def _assemble(self): 307 assembly = getattr(self, 'assembly', []) 308 if isinstance(assembly, type([])): 309 assembly = ' '.join(assembly) 310 bytecode = [] 311 push = bytecode.append 312 lenAssembly = len(assembly) 313 pos = _skipWhite(assembly, 0) 314 while pos < lenAssembly: 315 m = _tokenRE.match(assembly, pos) 316 if m is None: 317 raise tt_instructions_error("Syntax error in TT program (%s)" % assembly[pos-5:pos+15]) 318 dummy, mnemonic, arg, number, comment = m.groups() 319 pos = m.regs[0][1] 320 if comment: 321 pos = _skipWhite(assembly, pos) 322 continue 323 324 arg = arg.strip() 325 if mnemonic.startswith("INSTR"): 326 # Unknown instruction 327 op = int(mnemonic[5:]) 328 push(op) 329 elif mnemonic not in ("PUSH", "NPUSHB", "NPUSHW", "PUSHB", "PUSHW"): 330 op, argBits, name = mnemonicDict[mnemonic] 331 if len(arg) != argBits: 332 raise tt_instructions_error("Incorrect number of argument bits (%s[%s])" % (mnemonic, arg)) 333 if arg: 334 arg = binary2num(arg) 335 push(op + arg) 336 else: 337 push(op) 338 else: 339 args = [] 340 pos = _skipWhite(assembly, pos) 341 while pos < lenAssembly: 342 m = _tokenRE.match(assembly, pos) 343 if m is None: 344 raise tt_instructions_error("Syntax error in TT program (%s)" % assembly[pos:pos+15]) 345 dummy, _mnemonic, arg, number, comment = m.groups() 346 if number is None and comment is None: 347 break 348 pos = m.regs[0][1] 349 pos = _skipWhite(assembly, pos) 350 if comment is not None: 351 continue 352 args.append(int(number)) 353 nArgs = len(args) 354 if mnemonic == "PUSH": 355 # Automatically choose the most compact representation 356 nWords = 0 357 while nArgs: 358 while nWords < nArgs and nWords < 255 and not (0 <= args[nWords] <= 255): 359 nWords += 1 360 nBytes = 0 361 while nWords+nBytes < nArgs and nBytes < 255 and 0 <= args[nWords+nBytes] <= 255: 362 nBytes += 1 363 if nBytes < 2 and nWords + nBytes < 255 and nWords + nBytes != nArgs: 364 # Will write bytes as words 365 nWords += nBytes 366 continue 367 368 # Write words 369 if nWords: 370 if nWords <= 8: 371 op, argBits, name = streamMnemonicDict["PUSHW"] 372 op = op + nWords - 1 373 push(op) 374 else: 375 op, argBits, name = streamMnemonicDict["NPUSHW"] 376 push(op) 377 push(nWords) 378 for value in args[:nWords]: 379 assert -32768 <= value < 32768, "PUSH value out of range %d" % value 380 push((value >> 8) & 0xff) 381 push(value & 0xff) 382 383 # Write bytes 384 if nBytes: 385 pass 386 if nBytes <= 8: 387 op, argBits, name = streamMnemonicDict["PUSHB"] 388 op = op + nBytes - 1 389 push(op) 390 else: 391 op, argBits, name = streamMnemonicDict["NPUSHB"] 392 push(op) 393 push(nBytes) 394 for value in args[nWords:nWords+nBytes]: 395 push(value) 396 397 nTotal = nWords + nBytes 398 args = args[nTotal:] 399 nArgs -= nTotal 400 nWords = 0 401 else: 402 # Write exactly what we've been asked to 403 words = mnemonic[-1] == "W" 404 op, argBits, name = streamMnemonicDict[mnemonic] 405 if mnemonic[0] != "N": 406 assert nArgs <= 8, nArgs 407 op = op + nArgs - 1 408 push(op) 409 else: 410 assert nArgs < 256 411 push(op) 412 push(nArgs) 413 if words: 414 for value in args: 415 assert -32768 <= value < 32768, "PUSHW value out of range %d" % value 416 push((value >> 8) & 0xff) 417 push(value & 0xff) 418 else: 419 for value in args: 420 assert 0 <= value < 256, "PUSHB value out of range %d" % value 421 push(value) 422 423 pos = _skipWhite(assembly, pos) 424 425 if bytecode: 426 assert max(bytecode) < 256 and min(bytecode) >= 0 427 self.bytecode = array.array("B", bytecode) 428 429 def _disassemble(self, preserve=False): 430 assembly = [] 431 i = 0 432 bytecode = getattr(self, 'bytecode', []) 433 numBytecode = len(bytecode) 434 while i < numBytecode: 435 op = bytecode[i] 436 try: 437 mnemonic, argBits, argoffset, name = opcodeDict[op] 438 except KeyError: 439 if op in streamOpcodeDict: 440 values = [] 441 442 # Merge consecutive PUSH operations 443 while bytecode[i] in streamOpcodeDict: 444 op = bytecode[i] 445 mnemonic, argBits, argoffset, name = streamOpcodeDict[op] 446 words = mnemonic[-1] == "W" 447 if argBits: 448 nValues = op - argoffset + 1 449 else: 450 i = i + 1 451 nValues = bytecode[i] 452 i = i + 1 453 assert nValues > 0 454 if not words: 455 for j in range(nValues): 456 value = bytecode[i] 457 values.append(repr(value)) 458 i = i + 1 459 else: 460 for j in range(nValues): 461 # cast to signed int16 462 value = (bytecode[i] << 8) | bytecode[i+1] 463 if value >= 0x8000: 464 value = value - 0x10000 465 values.append(repr(value)) 466 i = i + 2 467 if preserve: 468 break 469 470 if not preserve: 471 mnemonic = "PUSH" 472 nValues = len(values) 473 if nValues == 1: 474 assembly.append("%s[ ] /* 1 value pushed */" % mnemonic) 475 else: 476 assembly.append("%s[ ] /* %s values pushed */" % (mnemonic, nValues)) 477 assembly.extend(values) 478 else: 479 assembly.append("INSTR%d[ ]" % op) 480 i = i + 1 481 else: 482 if argBits: 483 assembly.append(mnemonic + "[%s] /* %s */" % (num2binary(op - argoffset, argBits), name)) 484 else: 485 assembly.append(mnemonic + "[ ] /* %s */" % name) 486 i = i + 1 487 self.assembly = assembly 488 489 def __bool__(self): 490 """ 491 >>> p = Program() 492 >>> bool(p) 493 False 494 >>> bc = array.array("B", [0]) 495 >>> p.fromBytecode(bc) 496 >>> bool(p) 497 True 498 >>> p.bytecode.pop() 499 0 500 >>> bool(p) 501 False 502 503 >>> p = Program() 504 >>> asm = ['SVTCA[0]'] 505 >>> p.fromAssembly(asm) 506 >>> bool(p) 507 True 508 >>> p.assembly.pop() 509 'SVTCA[0]' 510 >>> bool(p) 511 False 512 """ 513 return ((hasattr(self, 'assembly') and len(self.assembly) > 0) or 514 (hasattr(self, 'bytecode') and len(self.bytecode) > 0)) 515 516 __nonzero__ = __bool__ 517 518 def __eq__(self, other): 519 if type(self) != type(other): 520 return NotImplemented 521 return self.__dict__ == other.__dict__ 522 523 def __ne__(self, other): 524 result = self.__eq__(other) 525 return result if result is NotImplemented else not result 526 527 528 def _test(): 529 """ 530 >>> _test() 531 True 532 """ 533 534 bc = b"""@;:9876543210/.-,+*)(\'&%$#"! \037\036\035\034\033\032\031\030\027\026\025\024\023\022\021\020\017\016\015\014\013\012\011\010\007\006\005\004\003\002\001\000,\001\260\030CXEj\260\031C`\260F#D#\020 \260FN\360M/\260\000\022\033!#\0213Y-,\001\260\030CX\260\005+\260\000\023K\260\024PX\261\000@8Y\260\006+\033!#\0213Y-,\001\260\030CXN\260\003%\020\362!\260\000\022M\033 E\260\004%\260\004%#Jad\260(RX!#\020\326\033\260\003%\020\362!\260\000\022YY-,\260\032CX!!\033\260\002%\260\002%I\260\003%\260\003%Ja d\260\020PX!!!\033\260\003%\260\003%I\260\000PX\260\000PX\270\377\3428!\033\260\0208!Y\033\260\000RX\260\0368!\033\270\377\3608!YYYY-,\001\260\030CX\260\005+\260\000\023K\260\024PX\271\000\000\377\3008Y\260\006+\033!#\0213Y-,N\001\212\020\261F\031CD\260\000\024\261\000F\342\260\000\025\271\000\000\377\3608\000\260\000<\260(+\260\002%\020\260\000<-,\001\030\260\000/\260\001\024\362\260\001\023\260\001\025M\260\000\022-,\001\260\030CX\260\005+\260\000\023\271\000\000\377\3408\260\006+\033!#\0213Y-,\001\260\030CXEdj#Edi\260\031Cd``\260F#D#\020 \260F\360/\260\000\022\033!! \212 \212RX\0213\033!!YY-,\001\261\013\012C#Ce\012-,\000\261\012\013C#C\013-,\000\260F#p\261\001F>\001\260F#p\261\002FE:\261\002\000\010\015-,\260\022+\260\002%E\260\002%Ej\260@\213`\260\002%#D!!!-,\260\023+\260\002%E\260\002%Ej\270\377\300\214`\260\002%#D!!!-,\260\000\260\022+!!!-,\260\000\260\023+!!!-,\001\260\006C\260\007Ce\012-, i\260@a\260\000\213 \261,\300\212\214\270\020\000b`+\014d#da\\X\260\003aY-,\261\000\003%EhT\260\034KPZX\260\003%E\260\003%E`h \260\004%#D\260\004%#D\033\260\003% Eh \212#D\260\003%Eh`\260\003%#DY-,\260\003% Eh \212#D\260\003%Edhe`\260\004%\260\001`#D-,\260\011CX\207!\300\033\260\022CX\207E\260\021+\260G#D\260Gz\344\033\003\212E\030i \260G#D\212\212\207 \260\240QX\260\021+\260G#D\260Gz\344\033!\260Gz\344YYY\030-, \212E#Eh`D-,EjB-,\001\030/-,\001\260\030CX\260\004%\260\004%Id#Edi\260@\213a \260\200bj\260\002%\260\002%a\214\260\031C`\260F#D!\212\020\260F\366!\033!!!!Y-,\001\260\030CX\260\002%E\260\002%Ed`j\260\003%Eja \260\004%Ej \212\213e\260\004%#D\214\260\003%#D!!\033 EjD EjDY-,\001 E\260\000U\260\030CZXEh#Ei\260@\213a \260\200bj \212#a \260\003%\213e\260\004%#D\214\260\003%#D!!\033!!\260\031+Y-,\001\212\212Ed#EdadB-,\260\004%\260\004%\260\031+\260\030CX\260\004%\260\004%\260\003%\260\033+\001\260\002%C\260@T\260\002%C\260\000TZX\260\003% E\260@aDY\260\002%C\260\000T\260\002%C\260@TZX\260\004% E\260@`DYY!!!!-,\001KRXC\260\002%E#aD\033!!Y-,\001KRXC\260\002%E#`D\033!!Y-,KRXED\033!!Y-,\001 \260\003%#I\260@`\260 c \260\000RX#\260\002%8#\260\002%e8\000\212c8\033!!!!!Y\001-,KPXED\033!!Y-,\001\260\005%\020# \212\365\000\260\001`#\355\354-,\001\260\005%\020# \212\365\000\260\001a#\355\354-,\001\260\006%\020\365\000\355\354-,F#F`\212\212F# F\212`\212a\270\377\200b# \020#\212\261KK\212pE` \260\000PX\260\001a\270\377\272\213\033\260F\214Y\260\020`h\001:-, E\260\003%FRX\260\002%F ha\260\003%\260\003%?#!8\033!\021Y-, E\260\003%FPX\260\002%F ha\260\003%\260\003%?#!8\033!\021Y-,\000\260\007C\260\006C\013-,\212\020\354-,\260\014CX!\033 F\260\000RX\270\377\3608\033\260\0208YY-, \260\000UX\270\020\000c\260\003%Ed\260\003%Eda\260\000SX\260\002\033\260@a\260\003Y%EiSXED\033!!Y\033!\260\002%E\260\002%Ead\260(QXED\033!!YY-,!!\014d#d\213\270@\000b-,!\260\200QX\014d#d\213\270 \000b\033\262\000@/+Y\260\002`-,!\260\300QX\014d#d\213\270\025Ub\033\262\000\200/+Y\260\002`-,\014d#d\213\270@\000b`#!-,KSX\260\004%\260\004%Id#Edi\260@\213a \260\200bj\260\002%\260\002%a\214\260F#D!\212\020\260F\366!\033!\212\021#\022 9/Y-,\260\002%\260\002%Id\260\300TX\270\377\3708\260\0108\033!!Y-,\260\023CX\003\033\002Y-,\260\023CX\002\033\003Y-,\260\012+#\020 <\260\027+-,\260\002%\270\377\3608\260(+\212\020# \320#\260\020+\260\005CX\300\033<Y \020\021\260\000\022\001-,KS#KQZX8\033!!Y-,\001\260\002%\020\320#\311\001\260\001\023\260\000\024\020\260\001<\260\001\026-,\001\260\000\023\260\001\260\003%I\260\003\0278\260\001\023-,KS#KQZX E\212`D\033!!Y-, 9/-""" 535 536 p = Program() 537 p.fromBytecode(bc) 538 asm = p.getAssembly(preserve=True) 539 p.fromAssembly(asm) 540 print(bc == p.getBytecode()) 541 542 if __name__ == "__main__": 543 import sys 544 import doctest 545 sys.exit(doctest.testmod().failed) 546
