Fix a couple of compiler warnings

dulwich/_pack.c

@@ -47,10 +47,10 @@ static int py_is_sha(PyObject *sha)
 }
 
 
-static size_t get_delta_header_size(uint8_t *delta, int *index, int length)
+static size_t get_delta_header_size(uint8_t *delta, size_t *index, size_t length)
 {
 	size_t size = 0;
-	int i = 0;
+	size_t i = 0;
 	while ((*index) < length) {
 		uint8_t cmd = delta[*index];
 		(*index)++;
@@ -89,10 +89,10 @@ static PyObject *py_chunked_as_string(PyObject *py_buf)
 static PyObject *py_apply_delta(PyObject *self, PyObject *args)
 {
 	uint8_t *src_buf, *delta;
-	int src_buf_len, delta_len;
+	size_t src_buf_len, delta_len;
 	size_t src_size, dest_size;
 	size_t outindex = 0;
-	int index;
+	size_t index;
 	uint8_t *out;
 	PyObject *ret, *py_src_buf, *py_delta, *ret_list;
 
@@ -110,16 +110,16 @@ static PyObject *py_apply_delta(PyObject *self, PyObject *args)
 	}
 
 	src_buf = (uint8_t *)PyString_AS_STRING(py_src_buf);
-	src_buf_len = PyString_GET_SIZE(py_src_buf);
+	src_buf_len = (size_t)PyString_GET_SIZE(py_src_buf);
 
 	delta = (uint8_t *)PyString_AS_STRING(py_delta);
-	delta_len = PyString_GET_SIZE(py_delta);
+	delta_len = (size_t)PyString_GET_SIZE(py_delta);
 
 	index = 0;
 	src_size = get_delta_header_size(delta, &index, delta_len);
 	if (src_size != src_buf_len) {
 		PyErr_Format(PyExc_ApplyDeltaError,
-					 "Unexpected source buffer size: %lu vs %d", src_size, src_buf_len);
+					 "Unexpected source buffer size: %lu vs %ld", src_size, src_buf_len);
 		Py_DECREF(py_src_buf);
 		Py_DECREF(py_delta);
 		return NULL;
@@ -134,7 +134,7 @@ static PyObject *py_apply_delta(PyObject *self, PyObject *args)
 	}
 	out = (uint8_t *)PyString_AsString(ret);
 	while (index < delta_len) {
-		char cmd = delta[index];
+		uint8_t cmd = delta[index];
 		index++;
 		if (cmd & 0x80) {
 			size_t cp_off = 0, cp_size = 0;