Expose reset as well

kittens/transfer/algorithm.c

@@ -175,6 +175,12 @@ Hasher_dealloc(PyObject *self) {
     Py_TYPE(self)->tp_free(self);
 }
 
+static PyObject*
+reset(Hasher *self) {
+    if (!self->h.reset(self->h.state)) return PyErr_NoMemory();
+    Py_RETURN_NONE;
+}
+
 static PyObject*
 update(Hasher *self, PyObject *o) {
     FREE_BUFFER_AFTER_FUNCTION Py_buffer data = {0};
@@ -217,6 +223,7 @@ static PyMethodDef Hasher_methods[] = {
     METHODB(update, METH_O),
     METHODB(digest, METH_NOARGS),
     METHODB(hexdigest, METH_NOARGS),
+    METHODB(reset, METH_NOARGS),
     {NULL}  /* Sentinel */
 };
 

kittens/transfer/rsync.pyi

@@ -1,3 +1,20 @@
+from typing import Union
+
+Buffer = Union[bytes, bytearray, memoryview]
 
 class RsyncError(Exception):
     pass
+
+class Hasher:
+    def __init__(self, which: str, data: Buffer = b''): ...
+    def update(self, data: Buffer) -> None: ...
+    def reset(self) -> None: ...
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+
+    @property
+    def digest_size(self) -> int: ...
+    @property
+    def block_size(self) -> int: ...
+    @property
+    def name(self) -> str: ...