| 376 | |
| 377 | |
| 378 | class CParserGenerator(ParserGenerator, GrammarVisitor): |
| 379 | def __init__( |
| 380 | self, |
| 381 | grammar: grammar.Grammar, |
| 382 | tokens: dict[int, str], |
| 383 | exact_tokens: dict[str, int], |
| 384 | non_exact_tokens: set[str], |
| 385 | file: IO[str] | None, |
| 386 | debug: bool = False, |
| 387 | skip_actions: bool = False, |
| 388 | ): |
| 389 | super().__init__(grammar, set(tokens.values()), file) |
| 390 | self.callmakervisitor: CCallMakerVisitor = CCallMakerVisitor( |
| 391 | self, exact_tokens, non_exact_tokens |
| 392 | ) |
| 393 | self._varname_counter = 0 |
| 394 | self.debug = debug |
| 395 | self.skip_actions = skip_actions |
| 396 | self.cleanup_statements: list[str] = [] |
| 397 | |
| 398 | def add_level(self) -> None: |
| 399 | self.print("if (p->level++ == MAXSTACK || _Py_ReachedRecursionLimitWithMargin(PyThreadState_Get(), 1)) {") |
| 400 | with self.indent(): |
| 401 | self.print("_Pypegen_stack_overflow(p);") |
| 402 | self.print("}") |
| 403 | |
| 404 | def remove_level(self) -> None: |
| 405 | self.print("p->level--;") |
| 406 | |
| 407 | def add_return(self, ret_val: str) -> None: |
| 408 | for stmt in self.cleanup_statements: |
| 409 | self.print(stmt) |
| 410 | self.remove_level() |
| 411 | self.print(f"return {ret_val};") |
| 412 | |
| 413 | def unique_varname(self, name: str = "tmpvar") -> str: |
| 414 | new_var = name + "_" + str(self._varname_counter) |
| 415 | self._varname_counter += 1 |
| 416 | return new_var |
| 417 | |
| 418 | def call_with_errorcheck_return(self, call_text: str, returnval: str) -> None: |
| 419 | error_var = self.unique_varname() |
| 420 | self.print(f"int {error_var} = {call_text};") |
| 421 | self.print(f"if ({error_var}) {{") |
| 422 | with self.indent(): |
| 423 | self.add_return(returnval) |
| 424 | self.print("}") |
| 425 | |
| 426 | def call_with_errorcheck_goto(self, call_text: str, goto_target: str) -> None: |
| 427 | error_var = self.unique_varname() |
| 428 | self.print(f"int {error_var} = {call_text};") |
| 429 | self.print(f"if ({error_var}) {{") |
| 430 | with self.indent(): |
| 431 | self.print(f"goto {goto_target};") |
| 432 | self.print("}") |
| 433 | |
| 434 | def out_of_memory_return( |
| 435 | self, |
no outgoing calls
searching dependent graphs…