fix: reject extra positional args in update()

Author: ifduyue

src/_xxhash.c

@@ -571,6 +571,11 @@ static PyObject *PYXXH32_update(PYXXH32Object *self, PyObject *const *args,
     PyObject *arg;
 
     if (nargs >= 1) {
+        if (nargs > 1) {
+            PyErr_Format(PyExc_TypeError,
+                "xxh32.update() takes at most 1 positional argument (%zd given)", nargs);
+            return NULL;
+        }
         arg = args[0];
         if (kwnames && PyTuple_GET_SIZE(kwnames) > 0) {
             PyErr_SetString(PyExc_TypeError,
@@ -951,6 +956,11 @@ static PyObject *PYXXH64_update(PYXXH64Object *self, PyObject *const *args,
     PyObject *arg;
 
     if (nargs >= 1) {
+        if (nargs > 1) {
+            PyErr_Format(PyExc_TypeError,
+                "xxh64.update() takes at most 1 positional argument (%zd given)", nargs);
+            return NULL;
+        }
         arg = args[0];
         if (kwnames && PyTuple_GET_SIZE(kwnames) > 0) {
             PyErr_SetString(PyExc_TypeError,
@@ -1330,6 +1340,11 @@ static PyObject *PYXXH3_64_update(PYXXH3_64Object *self, PyObject *const *args,
     PyObject *arg;
 
     if (nargs >= 1) {
+        if (nargs > 1) {
+            PyErr_Format(PyExc_TypeError,
+                "xxh3_64.update() takes at most 1 positional argument (%zd given)", nargs);
+            return NULL;
+        }
         arg = args[0];
         if (kwnames && PyTuple_GET_SIZE(kwnames) > 0) {
             PyErr_SetString(PyExc_TypeError,
@@ -1718,6 +1733,11 @@ static PyObject *PYXXH3_128_update(PYXXH3_128Object *self, PyObject *const *args
     PyObject *arg;
 
     if (nargs >= 1) {
+        if (nargs > 1) {
+            PyErr_Format(PyExc_TypeError,
+                "xxh3_128.update() takes at most 1 positional argument (%zd given)", nargs);
+            return NULL;
+        }
         arg = args[0];
         if (kwnames && PyTuple_GET_SIZE(kwnames) > 0) {
             PyErr_SetString(PyExc_TypeError,