port: add MSVC600 CPython compatibility layer

2026-08-17 17:35:32 +00:00
parent 3f15bfa5f7
commit a7a9560e5c
13 changed files with 2652 additions and 35 deletions
@@ -0,0 +1,54 @@
+/* Focused compile smoke test for the VC6 C89-mixed-declarations fixes in
+ * four Include/internal/pycore_*.h headers: pycore_code.h, pycore_dict.h,
+ * pycore_list.h, and pycore_call.h.
+ *
+ * VC6 is a C89-only compiler (plus Microsoft extensions): block-scope
+ * declarations must precede all statements in that block. CPython 3.11's
+ * source freely uses C99-style declarations after statements (e.g. after
+ * an assert()); the fix hoists each such declaration to the top of its
+ * enclosing block without changing evaluation order or behavior. See
+ * PORT_STATUS.md ("Mixed-declarations header slice") for full detail.
+ *
+ * Unlike scripts/fixtures/vc6_atomic_smoke.c and vc6_stdbool_smoke.c, this
+ * fixture includes the real "Python.h" (Py_BUILD_CORE is supplied by the
+ * probe script) rather than isolating the pycore_*.h headers from it:
+ * these four headers assume types (PyObject, PyCodeObject, PyListObject,
+ * PyDictValues, vectorcallfunc, ...) that come from the normal public
+ * header chain, the same way real CPython .c sources reach them.
+ */
+#include "Python.h"
+#include "pycore_code.h"
+#include "pycore_dict.h"
+#include "pycore_list.h"
+#include "pycore_call.h"
+
+int
+vc6_locals_kind_smoke(PyObject *kinds, int i, _PyLocals_Kind kind)
+{
+    _PyLocals_SetKind(kinds, i, kind);
+    return (int)_PyLocals_GetKind(kinds, i);
+}
+
+uint16_t
+vc6_adaptive_counter_smoke(uint16_t counter)
+{
+    return adaptive_counter_backoff(counter);
+}
+
+void
+vc6_dict_values_smoke(PyDictValues *values, Py_ssize_t ix)
+{
+    _PyDictValues_AddToInsertionOrder(values, ix);
+}
+
+int
+vc6_list_append_smoke(PyListObject *self, PyObject *newitem)
+{
+    return _PyList_AppendTakeRef(self, newitem);
+}
+
+vectorcallfunc
+vc6_vectorcall_smoke(PyObject *callable)
+{
+    return _PyVectorcall_FunctionInline(callable);
+}