port: advance VC6 typeobject frontier and preserve regression coverage

2026-10-26 18:09:33 +00:00
parent 35caf1a558
commit 5ab291a68c
162 changed files with 15675 additions and 85 deletions
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+"""Check PyTuple_New's C89 loop declaration and initialization order."""
+import re
+import sys
+from pathlib import Path
+
+source = Path(sys.argv[1] if len(sys.argv) > 1 else "cpython/Objects/tupleobject.c")
+match = re.search(
+    r"PyObject \*\nPyTuple_New\(Py_ssize_t size\)\n\{(.*?)\n\}",
+    source.read_text(),
+    re.S,
+)
+assert match, "PyTuple_New definition not found"
+body = match.group(1)
+assert re.match(r"\s*PyTupleObject \*op;\s*Py_ssize_t i;", body), (
+    "PyTuple_New: i must be declared before the size check; "
+    "for-loop declarations are not C89 compatible"
+)
+expected = """
+    PyTupleObject *op;
+    Py_ssize_t i;
+    if (size == 0) {
+        return tuple_get_empty();
+    }
+    op = tuple_alloc(size);
+    if (op == NULL) {
+        return NULL;
+    }
+    for (i = 0; i < size; i++) {
+        op->ob_item[i] = NULL;
+    }
+    _PyObject_GC_TRACK(op);
+    return (PyObject *) op;
+"""
+assert re.sub(r"\s+", "", body) == re.sub(r"\s+", "", expected), (
+    "preserve empty-tuple return, single allocation and failure return, loop "
+    "initialization/condition/increment, item clearing, GC tracking, and return order"
+)
+print("PyTuple_New C89 loop declaration and initialization order: PASS")