1#! /usr/bin/env python 2"""Generate C code from an ASDL description.""" 3 4import os, sys 5 6import asdl 7 8TABSIZE = 4 9MAX_COL = 80 10 11def get_c_type(name): 12 """Return a string for the C name of the type. 13 14 This function special cases the default types provided by asdl. 15 """ 16 if name in asdl.builtin_types: 17 return name 18 else: 19 return "%s_ty" % name 20 21def reflow_lines(s, depth): 22 """Reflow the line s indented depth tabs. 23 24 Return a sequence of lines where no line extends beyond MAX_COL 25 when properly indented. The first line is properly indented based 26 exclusively on depth * TABSIZE. All following lines -- these are 27 the reflowed lines generated by this function -- start at the same 28 column as the first character beyond the opening { in the first 29 line. 30 """ 31 size = MAX_COL - depth * TABSIZE 32 if len(s) < size: 33 return [s] 34 35 lines = [] 36 cur = s 37 padding = "" 38 while len(cur) > size: 39 i = cur.rfind(' ', 0, size) 40 # XXX this should be fixed for real 41 if i == -1 and 'GeneratorExp' in cur: 42 i = size + 3 43 assert i != -1, "Impossible line %d to reflow: %r" % (size, s) 44 lines.append(padding + cur[:i]) 45 if len(lines) == 1: 46 # find new size based on brace 47 j = cur.find('{', 0, i) 48 if j >= 0: 49 j += 2 # account for the brace and the space after it 50 size -= j 51 padding = " " * j 52 else: 53 j = cur.find('(', 0, i) 54 if j >= 0: 55 j += 1 # account for the paren (no space after it) 56 size -= j 57 padding = " " * j 58 cur = cur[i+1:] 59 else: 60 lines.append(padding + cur) 61 return lines 62 63def is_simple(sum): 64 """Return True if a sum is a simple. 65 66 A sum is simple if its types have no fields, e.g. 67 unaryop = Invert | Not | UAdd | USub 68 """ 69 for t in sum.types: 70 if t.fields: 71 return False 72 return True 73 74 75class EmitVisitor(asdl.VisitorBase): 76 """Visit that emits lines""" 77 78 def __init__(self, file): 79 self.file = file 80 self.identifiers = set() 81 super(EmitVisitor, self).__init__() 82 83 def emit_identifier(self, name): 84 name = str(name) 85 if name in self.identifiers: 86 return 87 self.emit("_Py_IDENTIFIER(%s);" % name, 0) 88 self.identifiers.add(name) 89 90 def emit(self, s, depth, reflow=True): 91 # XXX reflow long lines? 92 if reflow: 93 lines = reflow_lines(s, depth) 94 else: 95 lines = [s] 96 for line in lines: 97 if line: 98 line = (" " * TABSIZE * depth) + line 99 self.file.write(line + "\n") 100 101 102class TypeDefVisitor(EmitVisitor): 103 def visitModule(self, mod): 104 for dfn in mod.dfns: 105 self.visit(dfn) 106 107 def visitType(self, type, depth=0): 108 self.visit(type.value, type.name, depth) 109 110 def visitSum(self, sum, name, depth): 111 if is_simple(sum): 112 self.simple_sum(sum, name, depth) 113 else: 114 self.sum_with_constructors(sum, name, depth) 115 116 def simple_sum(self, sum, name, depth): 117 enum = [] 118 for i in range(len(sum.types)): 119 type = sum.types[i] 120 enum.append("%s=%d" % (type.name, i + 1)) 121 enums = ", ".join(enum) 122 ctype = get_c_type(name) 123 s = "typedef enum _%s { %s } %s;" % (name, enums, ctype) 124 self.emit(s, depth) 125 self.emit("", depth) 126 127 def sum_with_constructors(self, sum, name, depth): 128 ctype = get_c_type(name) 129 s = "typedef struct _%(name)s *%(ctype)s;" % locals() 130 self.emit(s, depth) 131 self.emit("", depth) 132 133 def visitProduct(self, product, name, depth): 134 ctype = get_c_type(name) 135 s = "typedef struct _%(name)s *%(ctype)s;" % locals() 136 self.emit(s, depth) 137 self.emit("", depth) 138 139 140class StructVisitor(EmitVisitor): 141 """Visitor to generate typedefs for AST.""" 142 143 def visitModule(self, mod): 144 for dfn in mod.dfns: 145 self.visit(dfn) 146 147 def visitType(self, type, depth=0): 148 self.visit(type.value, type.name, depth) 149 150 def visitSum(self, sum, name, depth): 151 if not is_simple(sum): 152 self.sum_with_constructors(sum, name, depth) 153 154 def sum_with_constructors(self, sum, name, depth): 155 def emit(s, depth=depth): 156 self.emit(s % sys._getframe(1).f_locals, depth) 157 enum = [] 158 for i in range(len(sum.types)): 159 type = sum.types[i] 160 enum.append("%s_kind=%d" % (type.name, i + 1)) 161 162 emit("enum _%(name)s_kind {" + ", ".join(enum) + "};") 163 164 emit("struct _%(name)s {") 165 emit("enum _%(name)s_kind kind;", depth + 1) 166 emit("union {", depth + 1) 167 for t in sum.types: 168 self.visit(t, depth + 2) 169 emit("} v;", depth + 1) 170 for field in sum.attributes: 171 # rudimentary attribute handling 172 type = str(field.type) 173 assert type in asdl.builtin_types, type 174 emit("%s %s;" % (type, field.name), depth + 1); 175 emit("};") 176 emit("") 177 178 def visitConstructor(self, cons, depth): 179 if cons.fields: 180 self.emit("struct {", depth) 181 for f in cons.fields: 182 self.visit(f, depth + 1) 183 self.emit("} %s;" % cons.name, depth) 184 self.emit("", depth) 185 186 def visitField(self, field, depth): 187 # XXX need to lookup field.type, because it might be something 188 # like a builtin... 189 ctype = get_c_type(field.type) 190 name = field.name 191 if field.seq: 192 if field.type == 'cmpop': 193 self.emit("asdl_int_seq *%(name)s;" % locals(), depth) 194 else: 195 self.emit("asdl_seq *%(name)s;" % locals(), depth) 196 else: 197 self.emit("%(ctype)s %(name)s;" % locals(), depth) 198 199 def visitProduct(self, product, name, depth): 200 self.emit("struct _%(name)s {" % locals(), depth) 201 for f in product.fields: 202 self.visit(f, depth + 1) 203 for field in product.attributes: 204 # rudimentary attribute handling 205 type = str(field.type) 206 assert type in asdl.builtin_types, type 207 self.emit("%s %s;" % (type, field.name), depth + 1); 208 self.emit("};", depth) 209 self.emit("", depth) 210 211 212class PrototypeVisitor(EmitVisitor): 213 """Generate function prototypes for the .h file""" 214 215 def visitModule(self, mod): 216 for dfn in mod.dfns: 217 self.visit(dfn) 218 219 def visitType(self, type): 220 self.visit(type.value, type.name) 221 222 def visitSum(self, sum, name): 223 if is_simple(sum): 224 pass # XXX 225 else: 226 for t in sum.types: 227 self.visit(t, name, sum.attributes) 228 229 def get_args(self, fields): 230 """Return list of C argument into, one for each field. 231 232 Argument info is 3-tuple of a C type, variable name, and flag 233 that is true if type can be NULL. 234 """ 235 args = [] 236 unnamed = {} 237 for f in fields: 238 if f.name is None: 239 name = f.type 240 c = unnamed[name] = unnamed.get(name, 0) + 1 241 if c > 1: 242 name = "name%d" % (c - 1) 243 else: 244 name = f.name 245 # XXX should extend get_c_type() to handle this 246 if f.seq: 247 if f.type == 'cmpop': 248 ctype = "asdl_int_seq *" 249 else: 250 ctype = "asdl_seq *" 251 else: 252 ctype = get_c_type(f.type) 253 args.append((ctype, name, f.opt or f.seq)) 254 return args 255 256 def visitConstructor(self, cons, type, attrs): 257 args = self.get_args(cons.fields) 258 attrs = self.get_args(attrs) 259 ctype = get_c_type(type) 260 self.emit_function(cons.name, ctype, args, attrs) 261 262 def emit_function(self, name, ctype, args, attrs, union=True): 263 args = args + attrs 264 if args: 265 argstr = ", ".join(["%s %s" % (atype, aname) 266 for atype, aname, opt in args]) 267 argstr += ", PyArena *arena" 268 else: 269 argstr = "PyArena *arena" 270 margs = "a0" 271 for i in range(1, len(args)+1): 272 margs += ", a%d" % i 273 self.emit("#define %s(%s) _Ta3_%s(%s)" % (name, margs, name, margs), 0, 274 reflow=False) 275 self.emit("%s _Ta3_%s(%s);" % (ctype, name, argstr), False) 276 277 def visitProduct(self, prod, name): 278 self.emit_function(name, get_c_type(name), 279 self.get_args(prod.fields), 280 self.get_args(prod.attributes), 281 union=False) 282 283 284class FunctionVisitor(PrototypeVisitor): 285 """Visitor to generate constructor functions for AST.""" 286 287 def emit_function(self, name, ctype, args, attrs, union=True): 288 def emit(s, depth=0, reflow=True): 289 self.emit(s, depth, reflow) 290 argstr = ", ".join(["%s %s" % (atype, aname) 291 for atype, aname, opt in args + attrs]) 292 if argstr: 293 argstr += ", PyArena *arena" 294 else: 295 argstr = "PyArena *arena" 296 self.emit("%s" % ctype, 0) 297 emit("%s(%s)" % (name, argstr)) 298 emit("{") 299 emit("%s p;" % ctype, 1) 300 for argtype, argname, opt in args: 301 if not opt and argtype != "int": 302 emit("if (!%s) {" % argname, 1) 303 emit("PyErr_SetString(PyExc_ValueError,", 2) 304 msg = "field %s is required for %s" % (argname, name) 305 emit(' "%s");' % msg, 306 2, reflow=False) 307 emit('return NULL;', 2) 308 emit('}', 1) 309 310 emit("p = (%s)PyArena_Malloc(arena, sizeof(*p));" % ctype, 1); 311 emit("if (!p)", 1) 312 emit("return NULL;", 2) 313 if union: 314 self.emit_body_union(name, args, attrs) 315 else: 316 self.emit_body_struct(name, args, attrs) 317 emit("return p;", 1) 318 emit("}") 319 emit("") 320 321 def emit_body_union(self, name, args, attrs): 322 def emit(s, depth=0, reflow=True): 323 self.emit(s, depth, reflow) 324 emit("p->kind = %s_kind;" % name, 1) 325 for argtype, argname, opt in args: 326 emit("p->v.%s.%s = %s;" % (name, argname, argname), 1) 327 for argtype, argname, opt in attrs: 328 emit("p->%s = %s;" % (argname, argname), 1) 329 330 def emit_body_struct(self, name, args, attrs): 331 def emit(s, depth=0, reflow=True): 332 self.emit(s, depth, reflow) 333 for argtype, argname, opt in args: 334 emit("p->%s = %s;" % (argname, argname), 1) 335 for argtype, argname, opt in attrs: 336 emit("p->%s = %s;" % (argname, argname), 1) 337 338 339class PickleVisitor(EmitVisitor): 340 341 def visitModule(self, mod): 342 for dfn in mod.dfns: 343 self.visit(dfn) 344 345 def visitType(self, type): 346 self.visit(type.value, type.name) 347 348 def visitSum(self, sum, name): 349 pass 350 351 def visitProduct(self, sum, name): 352 pass 353 354 def visitConstructor(self, cons, name): 355 pass 356 357 def visitField(self, sum): 358 pass 359 360 361class Obj2ModPrototypeVisitor(PickleVisitor): 362 def visitProduct(self, prod, name): 363 code = "static int obj2ast_%s(PyObject* obj, %s* out, PyArena* arena);" 364 self.emit(code % (name, get_c_type(name)), 0) 365 366 visitSum = visitProduct 367 368 369class Obj2ModVisitor(PickleVisitor): 370 def funcHeader(self, name): 371 ctype = get_c_type(name) 372 self.emit("int", 0) 373 self.emit("obj2ast_%s(PyObject* obj, %s* out, PyArena* arena)" % (name, ctype), 0) 374 self.emit("{", 0) 375 self.emit("int isinstance;", 1) 376 self.emit("", 0) 377 378 def sumTrailer(self, name, add_label=False): 379 self.emit("", 0) 380 # there's really nothing more we can do if this fails ... 381 error = "expected some sort of %s, but got %%R" % name 382 format = "PyErr_Format(PyExc_TypeError, \"%s\", obj);" 383 self.emit(format % error, 1, reflow=False) 384 if add_label: 385 self.emit("failed:", 1) 386 self.emit("Py_XDECREF(tmp);", 1) 387 self.emit("return 1;", 1) 388 self.emit("}", 0) 389 self.emit("", 0) 390 391 def simpleSum(self, sum, name): 392 self.funcHeader(name) 393 for t in sum.types: 394 line = ("isinstance = PyObject_IsInstance(obj, " 395 "(PyObject *)%s_type);") 396 self.emit(line % (t.name,), 1) 397 self.emit("if (isinstance == -1) {", 1) 398 self.emit("return 1;", 2) 399 self.emit("}", 1) 400 self.emit("if (isinstance) {", 1) 401 self.emit("*out = %s;" % t.name, 2) 402 self.emit("return 0;", 2) 403 self.emit("}", 1) 404 self.sumTrailer(name) 405 406 def buildArgs(self, fields): 407 return ", ".join(fields + ["arena"]) 408 409 def complexSum(self, sum, name): 410 self.funcHeader(name) 411 self.emit("PyObject *tmp = NULL;", 1) 412 for a in sum.attributes: 413 self.visitAttributeDeclaration(a, name, sum=sum) 414 self.emit("", 0) 415 # XXX: should we only do this for 'expr'? 416 self.emit("if (obj == Py_None) {", 1) 417 self.emit("*out = NULL;", 2) 418 self.emit("return 0;", 2) 419 self.emit("}", 1) 420 for a in sum.attributes: 421 self.visitField(a, name, sum=sum, depth=1) 422 for t in sum.types: 423 line = "isinstance = PyObject_IsInstance(obj, (PyObject*)%s_type);" 424 self.emit(line % (t.name,), 1) 425 self.emit("if (isinstance == -1) {", 1) 426 self.emit("return 1;", 2) 427 self.emit("}", 1) 428 self.emit("if (isinstance) {", 1) 429 for f in t.fields: 430 self.visitFieldDeclaration(f, t.name, sum=sum, depth=2) 431 self.emit("", 0) 432 for f in t.fields: 433 self.visitField(f, t.name, sum=sum, depth=2) 434 args = [f.name for f in t.fields] + [a.name for a in sum.attributes] 435 self.emit("*out = %s(%s);" % (t.name, self.buildArgs(args)), 2) 436 self.emit("if (*out == NULL) goto failed;", 2) 437 self.emit("return 0;", 2) 438 self.emit("}", 1) 439 self.sumTrailer(name, True) 440 441 def visitAttributeDeclaration(self, a, name, sum=sum): 442 ctype = get_c_type(a.type) 443 self.emit("%s %s;" % (ctype, a.name), 1) 444 445 def visitSum(self, sum, name): 446 if is_simple(sum): 447 self.simpleSum(sum, name) 448 else: 449 self.complexSum(sum, name) 450 451 def visitProduct(self, prod, name): 452 ctype = get_c_type(name) 453 self.emit("int", 0) 454 self.emit("obj2ast_%s(PyObject* obj, %s* out, PyArena* arena)" % (name, ctype), 0) 455 self.emit("{", 0) 456 self.emit("PyObject* tmp = NULL;", 1) 457 for f in prod.fields: 458 self.visitFieldDeclaration(f, name, prod=prod, depth=1) 459 for a in prod.attributes: 460 self.visitFieldDeclaration(a, name, prod=prod, depth=1) 461 self.emit("", 0) 462 for f in prod.fields: 463 self.visitField(f, name, prod=prod, depth=1) 464 for a in prod.attributes: 465 self.visitField(a, name, prod=prod, depth=1) 466 args = [f.name for f in prod.fields] 467 args.extend([a.name for a in prod.attributes]) 468 self.emit("*out = %s(%s);" % (name, self.buildArgs(args)), 1) 469 self.emit("return 0;", 1) 470 self.emit("failed:", 0) 471 self.emit("Py_XDECREF(tmp);", 1) 472 self.emit("return 1;", 1) 473 self.emit("}", 0) 474 self.emit("", 0) 475 476 def visitFieldDeclaration(self, field, name, sum=None, prod=None, depth=0): 477 ctype = get_c_type(field.type) 478 if field.seq: 479 if self.isSimpleType(field): 480 self.emit("asdl_int_seq* %s;" % field.name, depth) 481 else: 482 self.emit("asdl_seq* %s;" % field.name, depth) 483 else: 484 ctype = get_c_type(field.type) 485 self.emit("%s %s;" % (ctype, field.name), depth) 486 487 def isSimpleSum(self, field): 488 # XXX can the members of this list be determined automatically? 489 return field.type in ('expr_context', 'boolop', 'operator', 490 'unaryop', 'cmpop') 491 492 def isNumeric(self, field): 493 return get_c_type(field.type) in ("int", "bool") 494 495 def isSimpleType(self, field): 496 return self.isSimpleSum(field) or self.isNumeric(field) 497 498 def visitField(self, field, name, sum=None, prod=None, depth=0): 499 ctype = get_c_type(field.type) 500 self.emit("if (lookup_attr_id(obj, &PyId_%s, &tmp) < 0) {" % field.name, depth) 501 self.emit("return 1;", depth+1) 502 self.emit("}", depth) 503 if not field.opt: 504 self.emit("if (tmp == NULL) {", depth) 505 message = "required field \\\"%s\\\" missing from %s" % (field.name, name) 506 format = "PyErr_SetString(PyExc_TypeError, \"%s\");" 507 self.emit(format % message, depth+1, reflow=False) 508 self.emit("return 1;", depth+1) 509 else: 510 self.emit("if (tmp == NULL || tmp == Py_None) {", depth) 511 self.emit("Py_CLEAR(tmp);", depth+1) 512 if self.isNumeric(field): 513 self.emit("%s = 0;" % field.name, depth+1) 514 elif not self.isSimpleType(field): 515 self.emit("%s = NULL;" % field.name, depth+1) 516 else: 517 raise TypeError("could not determine the default value for %s" % field.name) 518 self.emit("}", depth) 519 self.emit("else {", depth) 520 521 self.emit("int res;", depth+1) 522 if field.seq: 523 self.emit("Py_ssize_t len;", depth+1) 524 self.emit("Py_ssize_t i;", depth+1) 525 self.emit("if (!PyList_Check(tmp)) {", depth+1) 526 self.emit("PyErr_Format(PyExc_TypeError, \"%s field \\\"%s\\\" must " 527 "be a list, not a %%.200s\", tmp->ob_type->tp_name);" % 528 (name, field.name), 529 depth+2, reflow=False) 530 self.emit("goto failed;", depth+2) 531 self.emit("}", depth+1) 532 self.emit("len = PyList_GET_SIZE(tmp);", depth+1) 533 if self.isSimpleType(field): 534 self.emit("%s = _Ta3_asdl_int_seq_new(len, arena);" % field.name, depth+1) 535 else: 536 self.emit("%s = _Ta3_asdl_seq_new(len, arena);" % field.name, depth+1) 537 self.emit("if (%s == NULL) goto failed;" % field.name, depth+1) 538 self.emit("for (i = 0; i < len; i++) {", depth+1) 539 self.emit("%s val;" % ctype, depth+2) 540 self.emit("res = obj2ast_%s(PyList_GET_ITEM(tmp, i), &val, arena);" % 541 field.type, depth+2, reflow=False) 542 self.emit("if (res != 0) goto failed;", depth+2) 543 self.emit("if (len != PyList_GET_SIZE(tmp)) {", depth+2) 544 self.emit("PyErr_SetString(PyExc_RuntimeError, \"%s field \\\"%s\\\" " 545 "changed size during iteration\");" % 546 (name, field.name), 547 depth+3, reflow=False) 548 self.emit("goto failed;", depth+3) 549 self.emit("}", depth+2) 550 self.emit("asdl_seq_SET(%s, i, val);" % field.name, depth+2) 551 self.emit("}", depth+1) 552 else: 553 self.emit("res = obj2ast_%s(tmp, &%s, arena);" % 554 (field.type, field.name), depth+1) 555 self.emit("if (res != 0) goto failed;", depth+1) 556 557 self.emit("Py_CLEAR(tmp);", depth+1) 558 self.emit("}", depth) 559 560 561class MarshalPrototypeVisitor(PickleVisitor): 562 563 def prototype(self, sum, name): 564 ctype = get_c_type(name) 565 self.emit("static int marshal_write_%s(PyObject **, int *, %s);" 566 % (name, ctype), 0) 567 568 visitProduct = visitSum = prototype 569 570 571class PyTypesDeclareVisitor(PickleVisitor): 572 573 def visitProduct(self, prod, name): 574 self.emit("static PyTypeObject *%s_type;" % name, 0) 575 self.emit("static PyObject* ast2obj_%s(void*);" % name, 0) 576 if prod.attributes: 577 for a in prod.attributes: 578 self.emit_identifier(a.name) 579 self.emit("static char *%s_attributes[] = {" % name, 0) 580 for a in prod.attributes: 581 self.emit('"%s",' % a.name, 1) 582 self.emit("};", 0) 583 if prod.fields: 584 for f in prod.fields: 585 self.emit_identifier(f.name) 586 self.emit("static char *%s_fields[]={" % name,0) 587 for f in prod.fields: 588 self.emit('"%s",' % f.name, 1) 589 self.emit("};", 0) 590 591 def visitSum(self, sum, name): 592 self.emit("static PyTypeObject *%s_type;" % name, 0) 593 if sum.attributes: 594 for a in sum.attributes: 595 self.emit_identifier(a.name) 596 self.emit("static char *%s_attributes[] = {" % name, 0) 597 for a in sum.attributes: 598 self.emit('"%s",' % a.name, 1) 599 self.emit("};", 0) 600 ptype = "void*" 601 if is_simple(sum): 602 ptype = get_c_type(name) 603 tnames = [] 604 for t in sum.types: 605 tnames.append(str(t.name)+"_singleton") 606 tnames = ", *".join(tnames) 607 self.emit("static PyObject *%s;" % tnames, 0) 608 self.emit("static PyObject* ast2obj_%s(%s);" % (name, ptype), 0) 609 for t in sum.types: 610 self.visitConstructor(t, name) 611 612 def visitConstructor(self, cons, name): 613 self.emit("static PyTypeObject *%s_type;" % cons.name, 0) 614 if cons.fields: 615 for t in cons.fields: 616 self.emit_identifier(t.name) 617 self.emit("static char *%s_fields[]={" % cons.name, 0) 618 for t in cons.fields: 619 self.emit('"%s",' % t.name, 1) 620 self.emit("};",0) 621 622class PyTypesVisitor(PickleVisitor): 623 624 def visitModule(self, mod): 625 self.emit(""" 626_Py_IDENTIFIER(_fields); 627_Py_IDENTIFIER(_attributes); 628 629typedef struct { 630 PyObject_HEAD 631 PyObject *dict; 632} AST_object; 633 634static void 635ast_dealloc(AST_object *self) 636{ 637 /* bpo-31095: UnTrack is needed before calling any callbacks */ 638 PyObject_GC_UnTrack(self); 639 Py_CLEAR(self->dict); 640 Py_TYPE(self)->tp_free(self); 641} 642 643static int 644ast_traverse(AST_object *self, visitproc visit, void *arg) 645{ 646 Py_VISIT(self->dict); 647 return 0; 648} 649 650static int 651ast_clear(AST_object *self) 652{ 653 Py_CLEAR(self->dict); 654 return 0; 655} 656 657static int lookup_attr_id(PyObject *v, _Py_Identifier *name, PyObject **result) 658{ 659 PyObject *oname = _PyUnicode_FromId(name); /* borrowed */ 660 if (!oname) { 661 *result = NULL; 662 return -1; 663 } 664 *result = PyObject_GetAttr(v, oname); 665 if (*result == NULL) { 666 if (!PyErr_ExceptionMatches(PyExc_AttributeError)) { 667 return -1; 668 } 669 PyErr_Clear(); 670 } 671 return 0; 672} 673 674static int 675ast_type_init(PyObject *self, PyObject *args, PyObject *kw) 676{ 677 Py_ssize_t i, numfields = 0; 678 int res = -1; 679 PyObject *key, *value, *fields; 680 if (lookup_attr_id((PyObject*)Py_TYPE(self), &PyId__fields, &fields) < 0) { 681 goto cleanup; 682 } 683 if (fields) { 684 numfields = PySequence_Size(fields); 685 if (numfields == -1) 686 goto cleanup; 687 } 688 689 res = 0; /* if no error occurs, this stays 0 to the end */ 690 if (numfields < PyTuple_GET_SIZE(args)) { 691 PyErr_Format(PyExc_TypeError, "%.400s constructor takes at most " 692 "%zd positional argument%s", 693 Py_TYPE(self)->tp_name, 694 numfields, numfields == 1 ? "" : "s"); 695 res = -1; 696 goto cleanup; 697 } 698 for (i = 0; i < PyTuple_GET_SIZE(args); i++) { 699 /* cannot be reached when fields is NULL */ 700 PyObject *name = PySequence_GetItem(fields, i); 701 if (!name) { 702 res = -1; 703 goto cleanup; 704 } 705 res = PyObject_SetAttr(self, name, PyTuple_GET_ITEM(args, i)); 706 Py_DECREF(name); 707 if (res < 0) 708 goto cleanup; 709 } 710 if (kw) { 711 i = 0; /* needed by PyDict_Next */ 712 while (PyDict_Next(kw, &i, &key, &value)) { 713 res = PyObject_SetAttr(self, key, value); 714 if (res < 0) 715 goto cleanup; 716 } 717 } 718 cleanup: 719 Py_XDECREF(fields); 720 return res; 721} 722 723/* Pickling support */ 724static PyObject * 725ast_type_reduce(PyObject *self, PyObject *unused) 726{ 727 _Py_IDENTIFIER(__dict__); 728 PyObject *dict; 729 if (lookup_attr_id(self, &PyId___dict__, &dict) < 0) { 730 return NULL; 731 } 732 if (dict) { 733 return Py_BuildValue("O()N", Py_TYPE(self), dict); 734 } 735 return Py_BuildValue("O()", Py_TYPE(self)); 736} 737 738static PyMethodDef ast_type_methods[] = { 739 {"__reduce__", ast_type_reduce, METH_NOARGS, NULL}, 740 {NULL} 741}; 742 743static PyGetSetDef ast_type_getsets[] = { 744 {"__dict__", PyObject_GenericGetDict, PyObject_GenericSetDict}, 745 {NULL} 746}; 747 748static PyTypeObject AST_type = { 749 PyVarObject_HEAD_INIT(NULL, 0) 750 "typed_ast._ast3.AST", 751 sizeof(AST_object), 752 0, 753 (destructor)ast_dealloc, /* tp_dealloc */ 754 0, /* tp_print */ 755 0, /* tp_getattr */ 756 0, /* tp_setattr */ 757 0, /* tp_reserved */ 758 0, /* tp_repr */ 759 0, /* tp_as_number */ 760 0, /* tp_as_sequence */ 761 0, /* tp_as_mapping */ 762 0, /* tp_hash */ 763 0, /* tp_call */ 764 0, /* tp_str */ 765 PyObject_GenericGetAttr, /* tp_getattro */ 766 PyObject_GenericSetAttr, /* tp_setattro */ 767 0, /* tp_as_buffer */ 768 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /* tp_flags */ 769 0, /* tp_doc */ 770 (traverseproc)ast_traverse, /* tp_traverse */ 771 (inquiry)ast_clear, /* tp_clear */ 772 0, /* tp_richcompare */ 773 0, /* tp_weaklistoffset */ 774 0, /* tp_iter */ 775 0, /* tp_iternext */ 776 ast_type_methods, /* tp_methods */ 777 0, /* tp_members */ 778 ast_type_getsets, /* tp_getset */ 779 0, /* tp_base */ 780 0, /* tp_dict */ 781 0, /* tp_descr_get */ 782 0, /* tp_descr_set */ 783 offsetof(AST_object, dict),/* tp_dictoffset */ 784 (initproc)ast_type_init, /* tp_init */ 785 PyType_GenericAlloc, /* tp_alloc */ 786 PyType_GenericNew, /* tp_new */ 787 PyObject_GC_Del, /* tp_free */ 788}; 789 790 791static PyTypeObject* make_type(char *type, PyTypeObject* base, char**fields, int num_fields) 792{ 793 _Py_IDENTIFIER(__module__); 794 _Py_static_string(PyId_typed_ast_ast3, "typed_ast._ast3"); 795 PyObject *fnames, *result; 796 int i; 797 fnames = PyTuple_New(num_fields); 798 if (!fnames) return NULL; 799 for (i = 0; i < num_fields; i++) { 800 PyObject *field = PyUnicode_FromString(fields[i]); 801 if (!field) { 802 Py_DECREF(fnames); 803 return NULL; 804 } 805 PyTuple_SET_ITEM(fnames, i, field); 806 } 807 result = PyObject_CallFunction((PyObject*)&PyType_Type, "s(O){OOOO}", 808 type, base, 809 _PyUnicode_FromId(&PyId__fields), fnames, 810 _PyUnicode_FromId(&PyId___module__), 811 _PyUnicode_FromId(&PyId_typed_ast_ast3)); 812 Py_DECREF(fnames); 813 return (PyTypeObject*)result; 814} 815 816static int add_attributes(PyTypeObject* type, char**attrs, int num_fields) 817{ 818 int i, result; 819 PyObject *s, *l = PyTuple_New(num_fields); 820 if (!l) 821 return 0; 822 for (i = 0; i < num_fields; i++) { 823 s = PyUnicode_FromString(attrs[i]); 824 if (!s) { 825 Py_DECREF(l); 826 return 0; 827 } 828 PyTuple_SET_ITEM(l, i, s); 829 } 830 result = _PyObject_SetAttrId((PyObject*)type, &PyId__attributes, l) >= 0; 831 Py_DECREF(l); 832 return result; 833} 834 835/* Conversion AST -> Python */ 836 837static PyObject* ast2obj_list(asdl_seq *seq, PyObject* (*func)(void*)) 838{ 839 Py_ssize_t i, n = asdl_seq_LEN(seq); 840 PyObject *result = PyList_New(n); 841 PyObject *value; 842 if (!result) 843 return NULL; 844 for (i = 0; i < n; i++) { 845 value = func(asdl_seq_GET(seq, i)); 846 if (!value) { 847 Py_DECREF(result); 848 return NULL; 849 } 850 PyList_SET_ITEM(result, i, value); 851 } 852 return result; 853} 854 855static PyObject* ast2obj_object(void *o) 856{ 857 if (!o) 858 o = Py_None; 859 Py_INCREF((PyObject*)o); 860 return (PyObject*)o; 861} 862#define ast2obj_singleton ast2obj_object 863#define ast2obj_constant ast2obj_object 864#define ast2obj_identifier ast2obj_object 865#define ast2obj_string ast2obj_object 866#define ast2obj_bytes ast2obj_object 867 868static PyObject* ast2obj_int(long b) 869{ 870 return PyLong_FromLong(b); 871} 872 873/* Conversion Python -> AST */ 874 875static int obj2ast_singleton(PyObject *obj, PyObject** out, PyArena* arena) 876{ 877 if (obj != Py_None && obj != Py_True && obj != Py_False) { 878 PyErr_SetString(PyExc_ValueError, 879 "AST singleton must be True, False, or None"); 880 return 1; 881 } 882 *out = obj; 883 return 0; 884} 885 886static int obj2ast_object(PyObject* obj, PyObject** out, PyArena* arena) 887{ 888 if (obj == Py_None) 889 obj = NULL; 890 if (obj) { 891 if (PyArena_AddPyObject(arena, obj) < 0) { 892 *out = NULL; 893 return -1; 894 } 895 Py_INCREF(obj); 896 } 897 *out = obj; 898 return 0; 899} 900 901static int obj2ast_constant(PyObject* obj, PyObject** out, PyArena* arena) 902{ 903 if (obj) { 904 if (PyArena_AddPyObject(arena, obj) < 0) { 905 *out = NULL; 906 return -1; 907 } 908 Py_INCREF(obj); 909 } 910 *out = obj; 911 return 0; 912} 913 914static int obj2ast_identifier(PyObject* obj, PyObject** out, PyArena* arena) 915{ 916 if (!PyUnicode_CheckExact(obj) && obj != Py_None) { 917 PyErr_SetString(PyExc_TypeError, "AST identifier must be of type str"); 918 return 1; 919 } 920 return obj2ast_object(obj, out, arena); 921} 922 923static int obj2ast_string(PyObject* obj, PyObject** out, PyArena* arena) 924{ 925 if (!PyUnicode_CheckExact(obj) && !PyBytes_CheckExact(obj)) { 926 PyErr_SetString(PyExc_TypeError, "AST string must be of type str"); 927 return 1; 928 } 929 return obj2ast_object(obj, out, arena); 930} 931 932static int obj2ast_bytes(PyObject* obj, PyObject** out, PyArena* arena) 933{ 934 if (!PyBytes_CheckExact(obj)) { 935 PyErr_SetString(PyExc_TypeError, "AST bytes must be of type bytes"); 936 return 1; 937 } 938 return obj2ast_object(obj, out, arena); 939} 940 941static int obj2ast_int(PyObject* obj, int* out, PyArena* arena) 942{ 943 int i; 944 if (!PyLong_Check(obj)) { 945 PyErr_Format(PyExc_ValueError, "invalid integer value: %R", obj); 946 return 1; 947 } 948 949 i = _PyLong_AsInt(obj); 950 if (i == -1 && PyErr_Occurred()) 951 return 1; 952 *out = i; 953 return 0; 954} 955 956static int add_ast_fields(void) 957{ 958 PyObject *empty_tuple, *d; 959 if (PyType_Ready(&AST_type) < 0) 960 return -1; 961 d = AST_type.tp_dict; 962 empty_tuple = PyTuple_New(0); 963 if (!empty_tuple || 964 _PyDict_SetItemId(d, &PyId__fields, empty_tuple) < 0 || 965 _PyDict_SetItemId(d, &PyId__attributes, empty_tuple) < 0) { 966 Py_XDECREF(empty_tuple); 967 return -1; 968 } 969 Py_DECREF(empty_tuple); 970 return 0; 971} 972 973""", 0, reflow=False) 974 975 self.emit("static int init_types(void)",0) 976 self.emit("{", 0) 977 self.emit("static int initialized;", 1) 978 self.emit("if (initialized) return 1;", 1) 979 self.emit("if (add_ast_fields() < 0) return 0;", 1) 980 for dfn in mod.dfns: 981 self.visit(dfn) 982 self.emit("initialized = 1;", 1) 983 self.emit("return 1;", 1); 984 self.emit("}", 0) 985 986 def visitProduct(self, prod, name): 987 if prod.fields: 988 fields = name+"_fields" 989 else: 990 fields = "NULL" 991 self.emit('%s_type = make_type("%s", &AST_type, %s, %d);' % 992 (name, name, fields, len(prod.fields)), 1) 993 self.emit("if (!%s_type) return 0;" % name, 1) 994 if prod.attributes: 995 self.emit("if (!add_attributes(%s_type, %s_attributes, %d)) return 0;" % 996 (name, name, len(prod.attributes)), 1) 997 else: 998 self.emit("if (!add_attributes(%s_type, NULL, 0)) return 0;" % name, 1) 999 1000 def visitSum(self, sum, name): 1001 self.emit('%s_type = make_type("%s", &AST_type, NULL, 0);' % 1002 (name, name), 1) 1003 self.emit("if (!%s_type) return 0;" % name, 1) 1004 if sum.attributes: 1005 self.emit("if (!add_attributes(%s_type, %s_attributes, %d)) return 0;" % 1006 (name, name, len(sum.attributes)), 1) 1007 else: 1008 self.emit("if (!add_attributes(%s_type, NULL, 0)) return 0;" % name, 1) 1009 simple = is_simple(sum) 1010 for t in sum.types: 1011 self.visitConstructor(t, name, simple) 1012 1013 def visitConstructor(self, cons, name, simple): 1014 if cons.fields: 1015 fields = cons.name+"_fields" 1016 else: 1017 fields = "NULL" 1018 self.emit('%s_type = make_type("%s", %s_type, %s, %d);' % 1019 (cons.name, cons.name, name, fields, len(cons.fields)), 1) 1020 self.emit("if (!%s_type) return 0;" % cons.name, 1) 1021 if simple: 1022 self.emit("%s_singleton = PyType_GenericNew(%s_type, NULL, NULL);" % 1023 (cons.name, cons.name), 1) 1024 self.emit("if (!%s_singleton) return 0;" % cons.name, 1) 1025 1026 1027class ASTModuleVisitor(PickleVisitor): 1028 1029 def visitModule(self, mod): 1030 self.emit("PyObject *ast3_parse(PyObject *self, PyObject *args);", 0) 1031 self.emit("static PyMethodDef ast3_methods[] = {", 0) 1032 self.emit(' {"_parse", ast3_parse, METH_VARARGS, "Parse string into typed AST."},', 0) 1033 self.emit(" {NULL, NULL, 0, NULL}", 0) 1034 self.emit("};", 0) 1035 self.emit("static struct PyModuleDef _astmodule = {", 0) 1036 self.emit(' PyModuleDef_HEAD_INIT, "_ast3", NULL, 0, ast3_methods', 0) 1037 self.emit("};", 0) 1038 self.emit("PyMODINIT_FUNC", 0) 1039 self.emit("PyInit__ast3(void)", 0) 1040 self.emit("{", 0) 1041 self.emit("PyObject *m, *d;", 1) 1042 self.emit("if (!init_types()) return NULL;", 1) 1043 self.emit('m = PyModule_Create(&_astmodule);', 1) 1044 self.emit("if (!m) return NULL;", 1) 1045 self.emit("d = PyModule_GetDict(m);", 1) 1046 self.emit('if (PyDict_SetItemString(d, "AST", (PyObject*)&AST_type) < 0) return NULL;', 1) 1047 self.emit('if (PyModule_AddIntMacro(m, PyCF_ONLY_AST) < 0)', 1) 1048 self.emit("return NULL;", 2) 1049 for dfn in mod.dfns: 1050 self.visit(dfn) 1051 self.emit("return m;", 1) 1052 self.emit("}", 0) 1053 1054 def visitProduct(self, prod, name): 1055 self.addObj(name) 1056 1057 def visitSum(self, sum, name): 1058 self.addObj(name) 1059 for t in sum.types: 1060 self.visitConstructor(t, name) 1061 1062 def visitConstructor(self, cons, name): 1063 self.addObj(cons.name) 1064 1065 def addObj(self, name): 1066 self.emit('if (PyDict_SetItemString(d, "%s", (PyObject*)%s_type) < 0) return NULL;' % (name, name), 1) 1067 1068 1069_SPECIALIZED_SEQUENCES = ('stmt', 'expr') 1070 1071def find_sequence(fields, doing_specialization): 1072 """Return True if any field uses a sequence.""" 1073 for f in fields: 1074 if f.seq: 1075 if not doing_specialization: 1076 return True 1077 if str(f.type) not in _SPECIALIZED_SEQUENCES: 1078 return True 1079 return False 1080 1081def has_sequence(types, doing_specialization): 1082 for t in types: 1083 if find_sequence(t.fields, doing_specialization): 1084 return True 1085 return False 1086 1087 1088class StaticVisitor(PickleVisitor): 1089 CODE = '''Very simple, always emit this static code. Override CODE''' 1090 1091 def visit(self, object): 1092 self.emit(self.CODE, 0, reflow=False) 1093 1094 1095class ObjVisitor(PickleVisitor): 1096 1097 def func_begin(self, name): 1098 ctype = get_c_type(name) 1099 self.emit("PyObject*", 0) 1100 self.emit("ast2obj_%s(void* _o)" % (name), 0) 1101 self.emit("{", 0) 1102 self.emit("%s o = (%s)_o;" % (ctype, ctype), 1) 1103 self.emit("PyObject *result = NULL, *value = NULL;", 1) 1104 self.emit('if (!o) {', 1) 1105 self.emit("Py_RETURN_NONE;", 2) 1106 self.emit("}", 1) 1107 self.emit('', 0) 1108 1109 def func_end(self): 1110 self.emit("return result;", 1) 1111 self.emit("failed:", 0) 1112 self.emit("Py_XDECREF(value);", 1) 1113 self.emit("Py_XDECREF(result);", 1) 1114 self.emit("return NULL;", 1) 1115 self.emit("}", 0) 1116 self.emit("", 0) 1117 1118 def visitSum(self, sum, name): 1119 if is_simple(sum): 1120 self.simpleSum(sum, name) 1121 return 1122 self.func_begin(name) 1123 self.emit("switch (o->kind) {", 1) 1124 for i in range(len(sum.types)): 1125 t = sum.types[i] 1126 self.visitConstructor(t, i + 1, name) 1127 self.emit("}", 1) 1128 for a in sum.attributes: 1129 self.emit("value = ast2obj_%s(o->%s);" % (a.type, a.name), 1) 1130 self.emit("if (!value) goto failed;", 1) 1131 self.emit('if (_PyObject_SetAttrId(result, &PyId_%s, value) < 0)' % a.name, 1) 1132 self.emit('goto failed;', 2) 1133 self.emit('Py_DECREF(value);', 1) 1134 self.func_end() 1135 1136 def simpleSum(self, sum, name): 1137 self.emit("PyObject* ast2obj_%s(%s_ty o)" % (name, name), 0) 1138 self.emit("{", 0) 1139 self.emit("switch(o) {", 1) 1140 for t in sum.types: 1141 self.emit("case %s:" % t.name, 2) 1142 self.emit("Py_INCREF(%s_singleton);" % t.name, 3) 1143 self.emit("return %s_singleton;" % t.name, 3) 1144 self.emit("default:", 2) 1145 self.emit('/* should never happen, but just in case ... */', 3) 1146 code = "PyErr_Format(PyExc_SystemError, \"unknown %s found\");" % name 1147 self.emit(code, 3, reflow=False) 1148 self.emit("return NULL;", 3) 1149 self.emit("}", 1) 1150 self.emit("}", 0) 1151 1152 def visitProduct(self, prod, name): 1153 self.func_begin(name) 1154 self.emit("result = PyType_GenericNew(%s_type, NULL, NULL);" % name, 1); 1155 self.emit("if (!result) return NULL;", 1) 1156 for field in prod.fields: 1157 self.visitField(field, name, 1, True) 1158 for a in prod.attributes: 1159 self.emit("value = ast2obj_%s(o->%s);" % (a.type, a.name), 1) 1160 self.emit("if (!value) goto failed;", 1) 1161 self.emit('if (_PyObject_SetAttrId(result, &PyId_%s, value) < 0)' % a.name, 1) 1162 self.emit('goto failed;', 2) 1163 self.emit('Py_DECREF(value);', 1) 1164 self.func_end() 1165 1166 def visitConstructor(self, cons, enum, name): 1167 self.emit("case %s_kind:" % cons.name, 1) 1168 self.emit("result = PyType_GenericNew(%s_type, NULL, NULL);" % cons.name, 2); 1169 self.emit("if (!result) goto failed;", 2) 1170 for f in cons.fields: 1171 self.visitField(f, cons.name, 2, False) 1172 self.emit("break;", 2) 1173 1174 def visitField(self, field, name, depth, product): 1175 def emit(s, d): 1176 self.emit(s, depth + d) 1177 if product: 1178 value = "o->%s" % field.name 1179 else: 1180 value = "o->v.%s.%s" % (name, field.name) 1181 self.set(field, value, depth) 1182 emit("if (!value) goto failed;", 0) 1183 emit('if (_PyObject_SetAttrId(result, &PyId_%s, value) == -1)' % field.name, 0) 1184 emit("goto failed;", 1) 1185 emit("Py_DECREF(value);", 0) 1186 1187 def emitSeq(self, field, value, depth, emit): 1188 emit("seq = %s;" % value, 0) 1189 emit("n = asdl_seq_LEN(seq);", 0) 1190 emit("value = PyList_New(n);", 0) 1191 emit("if (!value) goto failed;", 0) 1192 emit("for (i = 0; i < n; i++) {", 0) 1193 self.set("value", field, "asdl_seq_GET(seq, i)", depth + 1) 1194 emit("if (!value1) goto failed;", 1) 1195 emit("PyList_SET_ITEM(value, i, value1);", 1) 1196 emit("value1 = NULL;", 1) 1197 emit("}", 0) 1198 1199 def set(self, field, value, depth): 1200 if field.seq: 1201 # XXX should really check for is_simple, but that requires a symbol table 1202 if field.type == "cmpop": 1203 # While the sequence elements are stored as void*, 1204 # ast2obj_cmpop expects an enum 1205 self.emit("{", depth) 1206 self.emit("Py_ssize_t i, n = asdl_seq_LEN(%s);" % value, depth+1) 1207 self.emit("value = PyList_New(n);", depth+1) 1208 self.emit("if (!value) goto failed;", depth+1) 1209 self.emit("for(i = 0; i < n; i++)", depth+1) 1210 # This cannot fail, so no need for error handling 1211 self.emit("PyList_SET_ITEM(value, i, ast2obj_cmpop((cmpop_ty)asdl_seq_GET(%s, i)));" % value, 1212 depth+2, reflow=False) 1213 self.emit("}", depth) 1214 else: 1215 self.emit("value = ast2obj_list(%s, ast2obj_%s);" % (value, field.type), depth) 1216 else: 1217 ctype = get_c_type(field.type) 1218 self.emit("value = ast2obj_%s(%s);" % (field.type, value), depth, reflow=False) 1219 1220 1221class PartingShots(StaticVisitor): 1222 1223 CODE = """ 1224PyObject* Ta3AST_mod2obj(mod_ty t) 1225{ 1226 if (!init_types()) 1227 return NULL; 1228 return ast2obj_mod(t); 1229} 1230 1231/* mode is 0 for "exec", 1 for "eval" and 2 for "single" input */ 1232mod_ty Ta3AST_obj2mod(PyObject* ast, PyArena* arena, int mode) 1233{ 1234 mod_ty res; 1235 PyObject *req_type[3]; 1236 char *req_name[] = {"Module", "Expression", "Interactive"}; 1237 int isinstance; 1238 1239 req_type[0] = (PyObject*)Module_type; 1240 req_type[1] = (PyObject*)Expression_type; 1241 req_type[2] = (PyObject*)Interactive_type; 1242 1243 assert(0 <= mode && mode <= 2); 1244 1245 if (!init_types()) 1246 return NULL; 1247 1248 isinstance = PyObject_IsInstance(ast, req_type[mode]); 1249 if (isinstance == -1) 1250 return NULL; 1251 if (!isinstance) { 1252 PyErr_Format(PyExc_TypeError, "expected %s node, got %.400s", 1253 req_name[mode], Py_TYPE(ast)->tp_name); 1254 return NULL; 1255 } 1256 if (obj2ast_mod(ast, &res, arena) != 0) 1257 return NULL; 1258 else 1259 return res; 1260} 1261 1262int Ta3AST_Check(PyObject* obj) 1263{ 1264 if (!init_types()) 1265 return -1; 1266 return PyObject_IsInstance(obj, (PyObject*)&AST_type); 1267} 1268""" 1269 1270class ChainOfVisitors: 1271 def __init__(self, *visitors): 1272 self.visitors = visitors 1273 1274 def visit(self, object): 1275 for v in self.visitors: 1276 v.visit(object) 1277 v.emit("", 0) 1278 1279common_msg = "/* File automatically generated by %s. */\n\n" 1280 1281def main(srcfile, dump_module=False): 1282 argv0 = sys.argv[0] 1283 components = argv0.split(os.sep) 1284 argv0 = os.sep.join(components[-2:]) 1285 auto_gen_msg = common_msg % argv0 1286 mod = asdl.parse(srcfile) 1287 if dump_module: 1288 print('Parsed Module:') 1289 print(mod) 1290 if not asdl.check(mod): 1291 sys.exit(1) 1292 if H_FILE: 1293 with open(H_FILE, "w") as f: 1294 f.write(auto_gen_msg) 1295 f.write('#include "asdl.h"\n\n') 1296 c = ChainOfVisitors(TypeDefVisitor(f), 1297 StructVisitor(f), 1298 PrototypeVisitor(f), 1299 ) 1300 c.visit(mod) 1301 f.write("PyObject* Ta3AST_mod2obj(mod_ty t);\n") 1302 f.write("mod_ty Ta3AST_obj2mod(PyObject* ast, PyArena* arena, int mode);\n") 1303 f.write("int Ta3AST_Check(PyObject* obj);\n") 1304 1305 if C_FILE: 1306 with open(C_FILE, "w") as f: 1307 f.write(auto_gen_msg) 1308 f.write('#include <stddef.h>\n') 1309 f.write('\n') 1310 f.write('#include "Python.h"\n') 1311 f.write('#include "%s-ast.h"\n' % mod.name) 1312 f.write('\n') 1313 f.write("static PyTypeObject AST_type;\n") 1314 v = ChainOfVisitors( 1315 PyTypesDeclareVisitor(f), 1316 PyTypesVisitor(f), 1317 Obj2ModPrototypeVisitor(f), 1318 FunctionVisitor(f), 1319 ObjVisitor(f), 1320 Obj2ModVisitor(f), 1321 ASTModuleVisitor(f), 1322 PartingShots(f), 1323 ) 1324 v.visit(mod) 1325 1326if __name__ == "__main__": 1327 import getopt 1328 1329 H_FILE = '' 1330 C_FILE = '' 1331 dump_module = False 1332 opts, args = getopt.getopt(sys.argv[1:], "dh:c:") 1333 for o, v in opts: 1334 if o == '-h': 1335 H_FILE = v 1336 if o == '-c': 1337 C_FILE = v 1338 if o == '-d': 1339 dump_module = True 1340 if H_FILE and C_FILE: 1341 print('Must specify exactly one output file') 1342 sys.exit(1) 1343 elif len(args) != 1: 1344 print('Must specify single input file') 1345 sys.exit(1) 1346 main(args[0], dump_module) 1347