gh-111089: Use PyUnicode_AsUTF8() in Argument Clinic (#111585)

Replace PyUnicode_AsUTF8AndSize() with PyUnicode_AsUTF8() to remove
the explicit check for embedded null characters.

The change avoids to have to include explicitly <string.h> to get the
strlen() function when using a recent version of the limited C API.

1 files changed, 2 insertions, 7 deletions

diff --git a/Python/clinic/Python-tokenize.c.h b/Python/clinic/Python-tokenize.c.h
index 730fa8e..7417020 100644
--- a/Python/clinic/Python-tokenize.c.h
+++ b/Python/clinic/Python-tokenize.c.h
@@ -65,19 +65,14 @@ tokenizeriter_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
         _PyArg_BadArgument("tokenizeriter", "argument 'encoding'", "str", fastargs[2]);
         goto exit;
     }
-    Py_ssize_t encoding_length;
-    encoding = PyUnicode_AsUTF8AndSize(fastargs[2], &encoding_length);
+    encoding = PyUnicode_AsUTF8(fastargs[2]);
     if (encoding == NULL) {
         goto exit;
     }
-    if (strlen(encoding) != (size_t)encoding_length) {
-        PyErr_SetString(PyExc_ValueError, "embedded null character");
-        goto exit;
-    }
 skip_optional_kwonly:
     return_value = tokenizeriter_new_impl(type, readline, extra_tokens, encoding);
 
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=dcd6ec48f06a092e input=a9049054013a1b77]*/
+/*[clinic end generated code: output=92cb8176149f0924 input=a9049054013a1b77]*/