Major fixes and new features

venv/lib/python3.12/site-packages/asyncpg/pgproto/cpythonx.pxd

@@ -0,0 +1,23 @@
+# Copyright (C) 2016-present the asyncpg authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of asyncpg and is released under
+# the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
+
+
+from cpython cimport Py_buffer
+
+cdef extern from "Python.h":
+    int PyUnicode_1BYTE_KIND
+
+    int PyByteArray_CheckExact(object)
+    int PyByteArray_Resize(object, ssize_t) except -1
+    object PyByteArray_FromStringAndSize(const char *, ssize_t)
+    char* PyByteArray_AsString(object)
+
+    object PyUnicode_FromString(const char *u)
+    const char* PyUnicode_AsUTF8AndSize(
+        object unicode, ssize_t *size) except NULL
+
+    object PyUnicode_FromKindAndData(
+        int kind, const void *buffer, Py_ssize_t size)