diff --git a/base16384 b/base16384
index 3ca3c3c..e2f64f4 160000
--- a/base16384
+++ b/base16384
@@ -1 +1 @@
-Subproject commit 3ca3c3c459aa88871592d95417bcd5bc866c4be6
+Subproject commit e2f64f404f30b728b256d2c499edae1a5ba103c7
diff --git a/pybase16384/backends/cython/_core.c b/pybase16384/backends/cython/_core.c
index 564849d..85e12cb 100644
--- a/pybase16384/backends/cython/_core.c
+++ b/pybase16384/backends/cython/_core.c
@@ -30,7 +30,8 @@
         "sources": [
             "pybase16384/backends/cython/_core.pyx",
             "./base16384/base1464.c",
-            "./base16384/file.c"
+            "./base16384/file.c",
+            "./base16384/wrap.c"
         ]
     },
     "module_name": "pybase16384.backends.cython._core"
@@ -2804,6 +2805,10 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
 static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_decode_local_file_detailed(PyObject *, PyObject *, int, int __pyx_skip_dispatch); /*proto*/
 static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_encode_fd_detailed(int, int, int, int __pyx_skip_dispatch); /*proto*/
 static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_decode_fd_detailed(int, int, int, int __pyx_skip_dispatch); /*proto*/
+static Py_ssize_t __pyx_f_11pybase16384_8backends_6cython_5_core_b14_readcallback(void const *, void *, size_t); /*proto*/
+static Py_ssize_t __pyx_f_11pybase16384_8backends_6cython_5_core_b14_writecallback(void const *, void const *, size_t); /*proto*/
+static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_encode_stream_detailed(PyObject *, PyObject *, int, int __pyx_skip_dispatch); /*proto*/
+static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_decode_stream_detailed(PyObject *, PyObject *, int, int __pyx_skip_dispatch); /*proto*/
 static int __pyx_array_allocate_buffer(struct __pyx_array_obj *); /*proto*/
 static struct __pyx_array_obj *__pyx_array_new(PyObject *, Py_ssize_t, char *, char *, char *); /*proto*/
 static PyObject *__pyx_memoryview_new(PyObject *, int, int, __Pyx_TypeInfo *); /*proto*/
@@ -2862,6 +2867,7 @@ static PyObject *__pyx_builtin_IndexError;
 static const char __pyx_k_[] = ": ";
 static const char __pyx_k_O[] = "O";
 static const char __pyx_k_c[] = "c";
+static const char __pyx_k_f[] = "f";
 static const char __pyx_k__2[] = ".";
 static const char __pyx_k__3[] = "*";
 static const char __pyx_k__6[] = "'";
@@ -2870,7 +2876,7 @@ static const char __pyx_k_gc[] = "gc";
 static const char __pyx_k_id[] = "id";
 static const char __pyx_k__10[] = "\376\377";
 static const char __pyx_k__11[] = "\376";
-static const char __pyx_k__56[] = "?";
+static const char __pyx_k__58[] = "?";
 static const char __pyx_k_abc[] = "abc";
 static const char __pyx_k_and[] = " and ";
 static const char __pyx_k_got[] = " (got ";
@@ -2920,10 +2926,12 @@ static const char __pyx_k_name_2[] = "__name__";
 static const char __pyx_k_offset[] = "offset";
 static const char __pyx_k_output[] = "output";
 static const char __pyx_k_pickle[] = "pickle";
+static const char __pyx_k_reader[] = "reader";
 static const char __pyx_k_reduce[] = "__reduce__";
 static const char __pyx_k_struct[] = "struct";
 static const char __pyx_k_unpack[] = "unpack";
 static const char __pyx_k_update[] = "update";
+static const char __pyx_k_writer[] = "writer";
 static const char __pyx_k_disable[] = "disable";
 static const char __pyx_k_fortran[] = "fortran";
 static const char __pyx_k_memview[] = "memview";
@@ -2958,6 +2966,7 @@ static const char __pyx_k_pyx_vtable[] = "__pyx_vtable__";
 static const char __pyx_k_write_head[] = "write_head";
 static const char __pyx_k_MemoryError[] = "MemoryError";
 static const char __pyx_k_PickleError[] = "PickleError";
+static const char __pyx_k_client_data[] = "client_data";
 static const char __pyx_k_collections[] = "collections";
 static const char __pyx_k_decode_file[] = "decode_file";
 static const char __pyx_k_decode_into[] = "_decode_into";
@@ -3000,6 +3009,8 @@ static const char __pyx_k_Invalid_shape_in_axis[] = "Invalid shape in axis ";
 static const char __pyx_k_contiguous_and_direct[] = "<contiguous and direct>";
 static const char __pyx_k_Cannot_index_with_type[] = "Cannot index with type '";
 static const char __pyx_k_MemoryView_of_r_object[] = "<MemoryView of %r object>";
+static const char __pyx_k_decode_stream_detailed[] = "decode_stream_detailed";
+static const char __pyx_k_encode_stream_detailed[] = "encode_stream_detailed";
 static const char __pyx_k_MemoryView_of_r_at_0x_x[] = "<MemoryView of %r at 0x%x>";
 static const char __pyx_k_base16384_err_read_file[] = "base16384_err_read_file";
 static const char __pyx_k_contiguous_and_indirect[] = "<contiguous and indirect>";
@@ -3108,6 +3119,8 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_38encode_local_
 static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_40decode_local_file_detailed(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_inp, PyObject *__pyx_v_out, int __pyx_v_flag); /* proto */
 static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_42encode_fd_detailed(CYTHON_UNUSED PyObject *__pyx_self, int __pyx_v_inp, int __pyx_v_out, int __pyx_v_flag); /* proto */
 static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_44decode_fd_detailed(CYTHON_UNUSED PyObject *__pyx_self, int __pyx_v_inp, int __pyx_v_out, int __pyx_v_flag); /* proto */
+static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_46encode_stream_detailed(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_inp, PyObject *__pyx_v_out, int __pyx_v_flag); /* proto */
+static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_48decode_stream_detailed(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_inp, PyObject *__pyx_v_out, int __pyx_v_flag); /* proto */
 static PyObject *__pyx_tp_new_array(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static PyObject *__pyx_tp_new_Enum(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static PyObject *__pyx_tp_new_memoryview(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
@@ -3212,7 +3225,7 @@ typedef struct {
   PyObject *__pyx_kp_b__11;
   PyObject *__pyx_kp_u__2;
   PyObject *__pyx_n_s__3;
-  PyObject *__pyx_n_s__56;
+  PyObject *__pyx_n_s__58;
   PyObject *__pyx_kp_u__6;
   PyObject *__pyx_kp_u__7;
   PyObject *__pyx_n_s_abc;
@@ -3237,6 +3250,7 @@ typedef struct {
   PyObject *__pyx_n_s_chunk_ptr;
   PyObject *__pyx_n_s_class;
   PyObject *__pyx_n_s_class_getitem;
+  PyObject *__pyx_n_s_client_data;
   PyObject *__pyx_n_s_cline_in_traceback;
   PyObject *__pyx_n_s_collections;
   PyObject *__pyx_kp_s_collections_abc;
@@ -3256,6 +3270,7 @@ typedef struct {
   PyObject *__pyx_n_s_decode_local_file;
   PyObject *__pyx_n_s_decode_local_file_detailed;
   PyObject *__pyx_n_s_decode_safe;
+  PyObject *__pyx_n_s_decode_stream_detailed;
   PyObject *__pyx_n_s_dest;
   PyObject *__pyx_n_s_dict;
   PyObject *__pyx_kp_u_disable;
@@ -3274,8 +3289,10 @@ typedef struct {
   PyObject *__pyx_n_s_encode_local_file;
   PyObject *__pyx_n_s_encode_local_file_detailed;
   PyObject *__pyx_n_s_encode_safe;
+  PyObject *__pyx_n_s_encode_stream_detailed;
   PyObject *__pyx_n_s_enumerate;
   PyObject *__pyx_n_s_error;
+  PyObject *__pyx_n_s_f;
   PyObject *__pyx_n_s_first_check;
   PyObject *__pyx_n_s_flag;
   PyObject *__pyx_n_s_flags;
@@ -3328,6 +3345,7 @@ typedef struct {
   PyObject *__pyx_n_s_pyx_vtable;
   PyObject *__pyx_n_s_range;
   PyObject *__pyx_n_s_read;
+  PyObject *__pyx_n_s_reader;
   PyObject *__pyx_n_s_reduce;
   PyObject *__pyx_n_s_reduce_cython;
   PyObject *__pyx_n_s_reduce_ex;
@@ -3356,6 +3374,7 @@ typedef struct {
   PyObject *__pyx_n_s_version_info;
   PyObject *__pyx_n_s_write;
   PyObject *__pyx_n_s_write_head;
+  PyObject *__pyx_n_s_writer;
   PyObject *__pyx_int_0;
   PyObject *__pyx_int_1;
   PyObject *__pyx_int_2;
@@ -3414,6 +3433,8 @@ typedef struct {
   PyObject *__pyx_codeobj__53;
   PyObject *__pyx_codeobj__54;
   PyObject *__pyx_codeobj__55;
+  PyObject *__pyx_codeobj__56;
+  PyObject *__pyx_codeobj__57;
 } __pyx_mstate;
 
 #if CYTHON_USE_MODULE_STATE
@@ -3507,7 +3528,7 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_kp_b__11);
   Py_CLEAR(clear_module_state->__pyx_kp_u__2);
   Py_CLEAR(clear_module_state->__pyx_n_s__3);
-  Py_CLEAR(clear_module_state->__pyx_n_s__56);
+  Py_CLEAR(clear_module_state->__pyx_n_s__58);
   Py_CLEAR(clear_module_state->__pyx_kp_u__6);
   Py_CLEAR(clear_module_state->__pyx_kp_u__7);
   Py_CLEAR(clear_module_state->__pyx_n_s_abc);
@@ -3532,6 +3553,7 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_chunk_ptr);
   Py_CLEAR(clear_module_state->__pyx_n_s_class);
   Py_CLEAR(clear_module_state->__pyx_n_s_class_getitem);
+  Py_CLEAR(clear_module_state->__pyx_n_s_client_data);
   Py_CLEAR(clear_module_state->__pyx_n_s_cline_in_traceback);
   Py_CLEAR(clear_module_state->__pyx_n_s_collections);
   Py_CLEAR(clear_module_state->__pyx_kp_s_collections_abc);
@@ -3551,6 +3573,7 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_decode_local_file);
   Py_CLEAR(clear_module_state->__pyx_n_s_decode_local_file_detailed);
   Py_CLEAR(clear_module_state->__pyx_n_s_decode_safe);
+  Py_CLEAR(clear_module_state->__pyx_n_s_decode_stream_detailed);
   Py_CLEAR(clear_module_state->__pyx_n_s_dest);
   Py_CLEAR(clear_module_state->__pyx_n_s_dict);
   Py_CLEAR(clear_module_state->__pyx_kp_u_disable);
@@ -3569,8 +3592,10 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_encode_local_file);
   Py_CLEAR(clear_module_state->__pyx_n_s_encode_local_file_detailed);
   Py_CLEAR(clear_module_state->__pyx_n_s_encode_safe);
+  Py_CLEAR(clear_module_state->__pyx_n_s_encode_stream_detailed);
   Py_CLEAR(clear_module_state->__pyx_n_s_enumerate);
   Py_CLEAR(clear_module_state->__pyx_n_s_error);
+  Py_CLEAR(clear_module_state->__pyx_n_s_f);
   Py_CLEAR(clear_module_state->__pyx_n_s_first_check);
   Py_CLEAR(clear_module_state->__pyx_n_s_flag);
   Py_CLEAR(clear_module_state->__pyx_n_s_flags);
@@ -3623,6 +3648,7 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_pyx_vtable);
   Py_CLEAR(clear_module_state->__pyx_n_s_range);
   Py_CLEAR(clear_module_state->__pyx_n_s_read);
+  Py_CLEAR(clear_module_state->__pyx_n_s_reader);
   Py_CLEAR(clear_module_state->__pyx_n_s_reduce);
   Py_CLEAR(clear_module_state->__pyx_n_s_reduce_cython);
   Py_CLEAR(clear_module_state->__pyx_n_s_reduce_ex);
@@ -3651,6 +3677,7 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_version_info);
   Py_CLEAR(clear_module_state->__pyx_n_s_write);
   Py_CLEAR(clear_module_state->__pyx_n_s_write_head);
+  Py_CLEAR(clear_module_state->__pyx_n_s_writer);
   Py_CLEAR(clear_module_state->__pyx_int_0);
   Py_CLEAR(clear_module_state->__pyx_int_1);
   Py_CLEAR(clear_module_state->__pyx_int_2);
@@ -3709,6 +3736,8 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_codeobj__53);
   Py_CLEAR(clear_module_state->__pyx_codeobj__54);
   Py_CLEAR(clear_module_state->__pyx_codeobj__55);
+  Py_CLEAR(clear_module_state->__pyx_codeobj__56);
+  Py_CLEAR(clear_module_state->__pyx_codeobj__57);
   return 0;
 }
 #endif
@@ -3780,7 +3809,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_kp_b__11);
   Py_VISIT(traverse_module_state->__pyx_kp_u__2);
   Py_VISIT(traverse_module_state->__pyx_n_s__3);
-  Py_VISIT(traverse_module_state->__pyx_n_s__56);
+  Py_VISIT(traverse_module_state->__pyx_n_s__58);
   Py_VISIT(traverse_module_state->__pyx_kp_u__6);
   Py_VISIT(traverse_module_state->__pyx_kp_u__7);
   Py_VISIT(traverse_module_state->__pyx_n_s_abc);
@@ -3805,6 +3834,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_chunk_ptr);
   Py_VISIT(traverse_module_state->__pyx_n_s_class);
   Py_VISIT(traverse_module_state->__pyx_n_s_class_getitem);
+  Py_VISIT(traverse_module_state->__pyx_n_s_client_data);
   Py_VISIT(traverse_module_state->__pyx_n_s_cline_in_traceback);
   Py_VISIT(traverse_module_state->__pyx_n_s_collections);
   Py_VISIT(traverse_module_state->__pyx_kp_s_collections_abc);
@@ -3824,6 +3854,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_decode_local_file);
   Py_VISIT(traverse_module_state->__pyx_n_s_decode_local_file_detailed);
   Py_VISIT(traverse_module_state->__pyx_n_s_decode_safe);
+  Py_VISIT(traverse_module_state->__pyx_n_s_decode_stream_detailed);
   Py_VISIT(traverse_module_state->__pyx_n_s_dest);
   Py_VISIT(traverse_module_state->__pyx_n_s_dict);
   Py_VISIT(traverse_module_state->__pyx_kp_u_disable);
@@ -3842,8 +3873,10 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_encode_local_file);
   Py_VISIT(traverse_module_state->__pyx_n_s_encode_local_file_detailed);
   Py_VISIT(traverse_module_state->__pyx_n_s_encode_safe);
+  Py_VISIT(traverse_module_state->__pyx_n_s_encode_stream_detailed);
   Py_VISIT(traverse_module_state->__pyx_n_s_enumerate);
   Py_VISIT(traverse_module_state->__pyx_n_s_error);
+  Py_VISIT(traverse_module_state->__pyx_n_s_f);
   Py_VISIT(traverse_module_state->__pyx_n_s_first_check);
   Py_VISIT(traverse_module_state->__pyx_n_s_flag);
   Py_VISIT(traverse_module_state->__pyx_n_s_flags);
@@ -3896,6 +3929,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_pyx_vtable);
   Py_VISIT(traverse_module_state->__pyx_n_s_range);
   Py_VISIT(traverse_module_state->__pyx_n_s_read);
+  Py_VISIT(traverse_module_state->__pyx_n_s_reader);
   Py_VISIT(traverse_module_state->__pyx_n_s_reduce);
   Py_VISIT(traverse_module_state->__pyx_n_s_reduce_cython);
   Py_VISIT(traverse_module_state->__pyx_n_s_reduce_ex);
@@ -3924,6 +3958,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_version_info);
   Py_VISIT(traverse_module_state->__pyx_n_s_write);
   Py_VISIT(traverse_module_state->__pyx_n_s_write_head);
+  Py_VISIT(traverse_module_state->__pyx_n_s_writer);
   Py_VISIT(traverse_module_state->__pyx_int_0);
   Py_VISIT(traverse_module_state->__pyx_int_1);
   Py_VISIT(traverse_module_state->__pyx_int_2);
@@ -3982,6 +4017,8 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_codeobj__53);
   Py_VISIT(traverse_module_state->__pyx_codeobj__54);
   Py_VISIT(traverse_module_state->__pyx_codeobj__55);
+  Py_VISIT(traverse_module_state->__pyx_codeobj__56);
+  Py_VISIT(traverse_module_state->__pyx_codeobj__57);
   return 0;
 }
 #endif
@@ -4083,7 +4120,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_kp_b__11 __pyx_mstate_global->__pyx_kp_b__11
 #define __pyx_kp_u__2 __pyx_mstate_global->__pyx_kp_u__2
 #define __pyx_n_s__3 __pyx_mstate_global->__pyx_n_s__3
-#define __pyx_n_s__56 __pyx_mstate_global->__pyx_n_s__56
+#define __pyx_n_s__58 __pyx_mstate_global->__pyx_n_s__58
 #define __pyx_kp_u__6 __pyx_mstate_global->__pyx_kp_u__6
 #define __pyx_kp_u__7 __pyx_mstate_global->__pyx_kp_u__7
 #define __pyx_n_s_abc __pyx_mstate_global->__pyx_n_s_abc
@@ -4108,6 +4145,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_n_s_chunk_ptr __pyx_mstate_global->__pyx_n_s_chunk_ptr
 #define __pyx_n_s_class __pyx_mstate_global->__pyx_n_s_class
 #define __pyx_n_s_class_getitem __pyx_mstate_global->__pyx_n_s_class_getitem
+#define __pyx_n_s_client_data __pyx_mstate_global->__pyx_n_s_client_data
 #define __pyx_n_s_cline_in_traceback __pyx_mstate_global->__pyx_n_s_cline_in_traceback
 #define __pyx_n_s_collections __pyx_mstate_global->__pyx_n_s_collections
 #define __pyx_kp_s_collections_abc __pyx_mstate_global->__pyx_kp_s_collections_abc
@@ -4127,6 +4165,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_n_s_decode_local_file __pyx_mstate_global->__pyx_n_s_decode_local_file
 #define __pyx_n_s_decode_local_file_detailed __pyx_mstate_global->__pyx_n_s_decode_local_file_detailed
 #define __pyx_n_s_decode_safe __pyx_mstate_global->__pyx_n_s_decode_safe
+#define __pyx_n_s_decode_stream_detailed __pyx_mstate_global->__pyx_n_s_decode_stream_detailed
 #define __pyx_n_s_dest __pyx_mstate_global->__pyx_n_s_dest
 #define __pyx_n_s_dict __pyx_mstate_global->__pyx_n_s_dict
 #define __pyx_kp_u_disable __pyx_mstate_global->__pyx_kp_u_disable
@@ -4145,8 +4184,10 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_n_s_encode_local_file __pyx_mstate_global->__pyx_n_s_encode_local_file
 #define __pyx_n_s_encode_local_file_detailed __pyx_mstate_global->__pyx_n_s_encode_local_file_detailed
 #define __pyx_n_s_encode_safe __pyx_mstate_global->__pyx_n_s_encode_safe
+#define __pyx_n_s_encode_stream_detailed __pyx_mstate_global->__pyx_n_s_encode_stream_detailed
 #define __pyx_n_s_enumerate __pyx_mstate_global->__pyx_n_s_enumerate
 #define __pyx_n_s_error __pyx_mstate_global->__pyx_n_s_error
+#define __pyx_n_s_f __pyx_mstate_global->__pyx_n_s_f
 #define __pyx_n_s_first_check __pyx_mstate_global->__pyx_n_s_first_check
 #define __pyx_n_s_flag __pyx_mstate_global->__pyx_n_s_flag
 #define __pyx_n_s_flags __pyx_mstate_global->__pyx_n_s_flags
@@ -4199,6 +4240,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_n_s_pyx_vtable __pyx_mstate_global->__pyx_n_s_pyx_vtable
 #define __pyx_n_s_range __pyx_mstate_global->__pyx_n_s_range
 #define __pyx_n_s_read __pyx_mstate_global->__pyx_n_s_read
+#define __pyx_n_s_reader __pyx_mstate_global->__pyx_n_s_reader
 #define __pyx_n_s_reduce __pyx_mstate_global->__pyx_n_s_reduce
 #define __pyx_n_s_reduce_cython __pyx_mstate_global->__pyx_n_s_reduce_cython
 #define __pyx_n_s_reduce_ex __pyx_mstate_global->__pyx_n_s_reduce_ex
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 #define __pyx_n_s_write_head __pyx_mstate_global->__pyx_n_s_write_head
+#define __pyx_n_s_writer __pyx_mstate_global->__pyx_n_s_writer
 #define __pyx_int_0 __pyx_mstate_global->__pyx_int_0
 #define __pyx_int_1 __pyx_mstate_global->__pyx_int_1
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 #define __pyx_codeobj__54 __pyx_mstate_global->__pyx_codeobj__54
 #define __pyx_codeobj__55 __pyx_mstate_global->__pyx_codeobj__55
+#define __pyx_codeobj__56 __pyx_mstate_global->__pyx_codeobj__56
+#define __pyx_codeobj__57 __pyx_mstate_global->__pyx_codeobj__57
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-    /* "pybase16384/backends/cython/_core.pyx":33
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  * cdef inline bytes ensure_bytes(object inp):
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  * cdef inline bytes ensure_bytes(object inp):
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@@ -17990,7 +18035,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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   }
 
-  /* "pybase16384/backends/cython/_core.pyx":34
+  /* "pybase16384/backends/cython/_core.pyx":38
  *     if isinstance(inp, unicode):
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@@ -18000,7 +18045,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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   if (__pyx_t_1) {
 
-    /* "pybase16384/backends/cython/_core.pyx":35
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@@ -18008,12 +18053,12 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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     __Pyx_XDECREF(__pyx_r);
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@@ -18022,20 +18067,20 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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   }
 
-  /* "pybase16384/backends/cython/_core.pyx":36
+  /* "pybase16384/backends/cython/_core.pyx":40
  *     elif isinstance(inp, bytes):
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-  __Pyx_GetModuleGlobalName(__pyx_t_2, __pyx_n_s_Path); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 36, __pyx_L1_error)
+  __Pyx_GetModuleGlobalName(__pyx_t_2, __pyx_n_s_Path); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 40, __pyx_L1_error)
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+  __pyx_t_1 = PyObject_IsInstance(__pyx_v_inp, __pyx_t_2); if (unlikely(__pyx_t_1 == ((int)-1))) __PYX_ERR(0, 40, __pyx_L1_error)
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-    /* "pybase16384/backends/cython/_core.pyx":37
+    /* "pybase16384/backends/cython/_core.pyx":41
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-    __pyx_t_3 = __Pyx_PyObject_Str(__pyx_v_inp); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 37, __pyx_L1_error)
+    __pyx_t_3 = __Pyx_PyObject_Str(__pyx_v_inp); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 41, __pyx_L1_error)
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+    __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_t_3, __pyx_n_s_encode); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 41, __pyx_L1_error)
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@@ -18066,16 +18111,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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-      if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 37, __pyx_L1_error)
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+    if (!(likely(PyBytes_CheckExact(__pyx_t_2))||((__pyx_t_2) == Py_None) || __Pyx_RaiseUnexpectedTypeError("bytes", __pyx_t_2))) __PYX_ERR(0, 41, __pyx_L1_error)
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-    /* "pybase16384/backends/cython/_core.pyx":36
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@@ -18084,7 +18129,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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   }
 
-  /* "pybase16384/backends/cython/_core.pyx":39
+  /* "pybase16384/backends/cython/_core.pyx":43
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@@ -18093,14 +18138,14 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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+    __pyx_t_2 = __Pyx_PyObject_CallOneArg(((PyObject *)(&PyBytes_Type)), __pyx_v_inp); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 43, __pyx_L1_error)
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     __pyx_t_2 = 0;
     goto __pyx_L0;
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-  /* "pybase16384/backends/cython/_core.pyx":31
+  /* "pybase16384/backends/cython/_core.pyx":35
  * FLAG_DO_SUM_CHECK_FORCELY = BASE16384_FLAG_DO_SUM_CHECK_FORCELY
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  * cdef inline bytes ensure_bytes(object inp):             # <<<<<<<<<<<<<<
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   return __pyx_r;
 }
 
-/* "pybase16384/backends/cython/_core.pyx":41
+/* "pybase16384/backends/cython/_core.pyx":45
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  * cdef inline uint8_t PyFile_Check(object file):             # <<<<<<<<<<<<<<
@@ -18134,7 +18179,7 @@ static CYTHON_INLINE uint8_t __pyx_f_11pybase16384_8backends_6cython_5_core_PyFi
   int __pyx_t_1;
   int __pyx_t_2;
 
-  /* "pybase16384/backends/cython/_core.pyx":42
+  /* "pybase16384/backends/cython/_core.pyx":46
  * 
  * cdef inline uint8_t PyFile_Check(object file):
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@@ -18158,7 +18203,7 @@ static CYTHON_INLINE uint8_t __pyx_f_11pybase16384_8backends_6cython_5_core_PyFi
   __pyx_L4_bool_binop_done:;
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-    /* "pybase16384/backends/cython/_core.pyx":44
+    /* "pybase16384/backends/cython/_core.pyx":48
  *     if PyObject_HasAttrString(file, "read") and PyObject_HasAttrString(file, "write") and PyObject_HasAttrString(file,
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@@ -18168,7 +18213,7 @@ static CYTHON_INLINE uint8_t __pyx_f_11pybase16384_8backends_6cython_5_core_PyFi
     __pyx_r = 1;
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-    /* "pybase16384/backends/cython/_core.pyx":42
+    /* "pybase16384/backends/cython/_core.pyx":46
  * 
  * cdef inline uint8_t PyFile_Check(object file):
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   }
 
-  /* "pybase16384/backends/cython/_core.pyx":45
+  /* "pybase16384/backends/cython/_core.pyx":49
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  *     return 0             # <<<<<<<<<<<<<<
@@ -18187,7 +18232,7 @@ static CYTHON_INLINE uint8_t __pyx_f_11pybase16384_8backends_6cython_5_core_PyFi
   __pyx_r = 0;
   goto __pyx_L0;
 
-  /* "pybase16384/backends/cython/_core.pyx":41
+  /* "pybase16384/backends/cython/_core.pyx":45
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  * cdef inline uint8_t PyFile_Check(object file):             # <<<<<<<<<<<<<<
@@ -18200,7 +18245,7 @@ static CYTHON_INLINE uint8_t __pyx_f_11pybase16384_8backends_6cython_5_core_PyFi
   return __pyx_r;
 }
 
-/* "pybase16384/backends/cython/_core.pyx":47
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  * cpdef inline int encode_len(int dlen) nogil:             # <<<<<<<<<<<<<<
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 static CYTHON_INLINE int __pyx_f_11pybase16384_8backends_6cython_5_core_encode_len(int __pyx_v_dlen, CYTHON_UNUSED int __pyx_skip_dispatch) {
   int __pyx_r;
 
-  /* "pybase16384/backends/cython/_core.pyx":48
+  /* "pybase16384/backends/cython/_core.pyx":52
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  * cpdef inline int encode_len(int dlen) nogil:
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@@ -18228,7 +18273,7 @@ static CYTHON_INLINE int __pyx_f_11pybase16384_8backends_6cython_5_core_encode_l
   __pyx_r = base16384_encode_len(__pyx_v_dlen);
   goto __pyx_L0;
 
-  /* "pybase16384/backends/cython/_core.pyx":47
+  /* "pybase16384/backends/cython/_core.pyx":51
  *     return 0
  * 
  * cpdef inline int encode_len(int dlen) nogil:             # <<<<<<<<<<<<<<
@@ -18295,23 +18340,23 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
           (void)__Pyx_Arg_NewRef_FASTCALL(values[0]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 47, __pyx_L3_error)
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       goto __pyx_L5_argtuple_error;
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-  /* "pybase16384/backends/cython/_core.pyx":51
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@@ -18472,14 +18517,14 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
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+    __pyx_v_dlen = __Pyx_PyInt_As_int(values[0]); if (unlikely((__pyx_v_dlen == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 54, __pyx_L3_error)
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-  __Pyx_RaiseArgtupleInvalid("decode_len", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 50, __pyx_L3_error)
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-  __pyx_t_2 = __Pyx_PyInt_From_int(__pyx_t_1); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 50, __pyx_L1_error)
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-  /* "pybase16384/backends/cython/_core.pyx":54
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-  /* "pybase16384/backends/cython/_core.pyx":55
+  /* "pybase16384/backends/cython/_core.pyx":59
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-  /* "pybase16384/backends/cython/_core.pyx":57
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@@ -18624,16 +18669,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core__e
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-    /* "pybase16384/backends/cython/_core.pyx":58
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-    /* "pybase16384/backends/cython/_core.pyx":57
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-  /* "pybase16384/backends/cython/_core.pyx":60
+  /* "pybase16384/backends/cython/_core.pyx":64
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-        /* "pybase16384/backends/cython/_core.pyx":61
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-      /* "pybase16384/backends/cython/_core.pyx":60
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-    /* "pybase16384/backends/cython/_core.pyx":65
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@@ -18916,7 +18961,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_4_encode(CYTHON
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-  /* "pybase16384/backends/cython/_core.pyx":70
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-  /* "pybase16384/backends/cython/_core.pyx":71
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-  /* "pybase16384/backends/cython/_core.pyx":72
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-  /* "pybase16384/backends/cython/_core.pyx":73
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-    /* "pybase16384/backends/cython/_core.pyx":74
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-    /* "pybase16384/backends/cython/_core.pyx":73
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-        /* "pybase16384/backends/cython/_core.pyx":77
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-        /* "pybase16384/backends/cython/_core.pyx":79
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-      /* "pybase16384/backends/cython/_core.pyx":76
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@@ -19065,7 +19110,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core__e
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-  /* "pybase16384/backends/cython/_core.pyx":80
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-    /* "pybase16384/backends/cython/_core.pyx":81
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@@ -19082,7 +19127,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core__e
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-  /* "pybase16384/backends/cython/_core.pyx":92
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-        /* "pybase16384/backends/cython/_core.pyx":93
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-      /* "pybase16384/backends/cython/_core.pyx":92
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-    /* "pybase16384/backends/cython/_core.pyx":97
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-  /* "pybase16384/backends/cython/_core.pyx":103
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-  /* "pybase16384/backends/cython/_core.pyx":104
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-  /* "pybase16384/backends/cython/_core.pyx":105
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-    PyErr_NoMemory(); __PYX_ERR(0, 106, __pyx_L1_error)
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-    /* "pybase16384/backends/cython/_core.pyx":105
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-        /* "pybase16384/backends/cython/_core.pyx":109
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-        /* "pybase16384/backends/cython/_core.pyx":111
+        /* "pybase16384/backends/cython/_core.pyx":115
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-      /* "pybase16384/backends/cython/_core.pyx":108
+      /* "pybase16384/backends/cython/_core.pyx":112
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-  /* "pybase16384/backends/cython/_core.pyx":112
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-    /* "pybase16384/backends/cython/_core.pyx":113
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-        /* "pybase16384/backends/cython/_core.pyx":137
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-        /* "pybase16384/backends/cython/_core.pyx":135
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@@ -20685,7 +20730,7 @@ static CYTHON_INLINE int __pyx_f_11pybase16384_8backends_6cython_5_core__decode_
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-  /* "pybase16384/backends/cython/_core.pyx":140
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-  /* "pybase16384/backends/cython/_core.pyx":141
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  * cpdef inline int _decode_into(const uint8_t[::1] data, uint8_t[::1] dest) except -1:
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@@ -20703,7 +20748,7 @@ static CYTHON_INLINE int __pyx_f_11pybase16384_8backends_6cython_5_core__decode_
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-  /* "pybase16384/backends/cython/_core.pyx":142
+  /* "pybase16384/backends/cython/_core.pyx":146
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-  /* "pybase16384/backends/cython/_core.pyx":143
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-    /* "pybase16384/backends/cython/_core.pyx":144
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-  /* "pybase16384/backends/cython/_core.pyx":145
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-        /* "pybase16384/backends/cython/_core.pyx":146
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-        /* "pybase16384/backends/cython/_core.pyx":146
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-          else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 161, __pyx_L3_error)
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-          else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 161, __pyx_L3_error)
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-      /* "pybase16384/backends/cython/_core.pyx":193
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-        /* "pybase16384/backends/cython/_core.pyx":194
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-      __pyx_v_size = __pyx_t_8;
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+      /* "pybase16384/backends/cython/_core.pyx":289
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-        /* "pybase16384/backends/cython/_core.pyx":286
- *             size = PyBytes_Size(chunk)
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-        /* "pybase16384/backends/cython/_core.pyx":285
+        /* "pybase16384/backends/cython/_core.pyx":289
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-        /* "pybase16384/backends/cython/_core.pyx":288
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-          /* "pybase16384/backends/cython/_core.pyx":289
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-          /* "pybase16384/backends/cython/_core.pyx":288
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@@ -23726,50 +23765,49 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_24decode_file(C
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-        /* "pybase16384/backends/cython/_core.pyx":295
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-          /* "pybase16384/backends/cython/_core.pyx":296
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-          /* "pybase16384/backends/cython/_core.pyx":297
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-          /* "pybase16384/backends/cython/_core.pyx":295
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-        /* "pybase16384/backends/cython/_core.pyx":299
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-        /* "pybase16384/backends/cython/_core.pyx":294
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-      /* "pybase16384/backends/cython/_core.pyx":300
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-      /* "pybase16384/backends/cython/_core.pyx":301
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-            /* "pybase16384/backends/cython/_core.pyx":302
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-    /* "pybase16384/backends/cython/_core.pyx":321
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-    /* "pybase16384/backends/cython/_core.pyx":320
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@@ -24389,7 +24426,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_26decode_file_s
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@@ -24443,16 +24480,16 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_26decode_file_s
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-    /* "pybase16384/backends/cython/_core.pyx":329
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-    PyErr_NoMemory(); __PYX_ERR(0, 329, __pyx_L1_error)
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-    /* "pybase16384/backends/cython/_core.pyx":328
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-    /* "pybase16384/backends/cython/_core.pyx":334
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-      /* "pybase16384/backends/cython/_core.pyx":335
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-      /* "pybase16384/backends/cython/_core.pyx":336
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-        /* "pybase16384/backends/cython/_core.pyx":338
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-        /* "pybase16384/backends/cython/_core.pyx":340
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-          /* "pybase16384/backends/cython/_core.pyx":341
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-          /* "pybase16384/backends/cython/_core.pyx":344
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-          /* "pybase16384/backends/cython/_core.pyx":340
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-  /* "pybase16384/backends/cython/_core.pyx":307
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     case base16384_err_open_input_file:
 
-    /* "pybase16384/backends/cython/_core.pyx":372
+    /* "pybase16384/backends/cython/_core.pyx":376
  *         return "base16384_err_write_file"
  *     elif ret == base16384_err_open_input_file:
  *         return "base16384_err_open_input_file"             # <<<<<<<<<<<<<<
@@ -25152,7 +25187,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     __pyx_r = __pyx_n_u_base16384_err_open_input_file;
     goto __pyx_L0;
 
-    /* "pybase16384/backends/cython/_core.pyx":371
+    /* "pybase16384/backends/cython/_core.pyx":375
  *     elif ret == base16384_err_write_file:
  *         return "base16384_err_write_file"
  *     elif ret == base16384_err_open_input_file:             # <<<<<<<<<<<<<<
@@ -25162,7 +25197,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     break;
     case base16384_err_map_input_file:
 
-    /* "pybase16384/backends/cython/_core.pyx":374
+    /* "pybase16384/backends/cython/_core.pyx":378
  *         return "base16384_err_open_input_file"
  *     elif ret == base16384_err_map_input_file:
  *         return "base16384_err_map_input_file"             # <<<<<<<<<<<<<<
@@ -25174,7 +25209,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     __pyx_r = __pyx_n_u_base16384_err_map_input_file;
     goto __pyx_L0;
 
-    /* "pybase16384/backends/cython/_core.pyx":373
+    /* "pybase16384/backends/cython/_core.pyx":377
  *     elif ret == base16384_err_open_input_file:
  *         return "base16384_err_open_input_file"
  *     elif ret == base16384_err_map_input_file:             # <<<<<<<<<<<<<<
@@ -25184,7 +25219,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     break;
     case base16384_err_read_file:
 
-    /* "pybase16384/backends/cython/_core.pyx":376
+    /* "pybase16384/backends/cython/_core.pyx":380
  *         return "base16384_err_map_input_file"
  *     elif ret == base16384_err_read_file:
  *         return "base16384_err_read_file"             # <<<<<<<<<<<<<<
@@ -25196,7 +25231,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     __pyx_r = __pyx_n_u_base16384_err_read_file;
     goto __pyx_L0;
 
-    /* "pybase16384/backends/cython/_core.pyx":375
+    /* "pybase16384/backends/cython/_core.pyx":379
  *     elif ret == base16384_err_map_input_file:
  *         return "base16384_err_map_input_file"
  *     elif ret == base16384_err_read_file:             # <<<<<<<<<<<<<<
@@ -25206,7 +25241,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     break;
     case base16384_err_invalid_file_name:
 
-    /* "pybase16384/backends/cython/_core.pyx":378
+    /* "pybase16384/backends/cython/_core.pyx":382
  *         return "base16384_err_read_file"
  *     elif ret == base16384_err_invalid_file_name:
  *         return "base16384_err_invalid_file_name"             # <<<<<<<<<<<<<<
@@ -25218,7 +25253,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     __pyx_r = __pyx_n_u_base16384_err_invalid_file_name;
     goto __pyx_L0;
 
-    /* "pybase16384/backends/cython/_core.pyx":377
+    /* "pybase16384/backends/cython/_core.pyx":381
  *     elif ret == base16384_err_read_file:
  *         return "base16384_err_read_file"
  *     elif ret == base16384_err_invalid_file_name:             # <<<<<<<<<<<<<<
@@ -25228,7 +25263,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     break;
     case base16384_err_invalid_commandline_parameter:
 
-    /* "pybase16384/backends/cython/_core.pyx":380
+    /* "pybase16384/backends/cython/_core.pyx":384
  *         return "base16384_err_invalid_file_name"
  *     elif ret == base16384_err_invalid_commandline_parameter:
  *         return "base16384_err_invalid_commandline_parameter"             # <<<<<<<<<<<<<<
@@ -25240,7 +25275,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     __pyx_r = __pyx_n_u_base16384_err_invalid_commandlin;
     goto __pyx_L0;
 
-    /* "pybase16384/backends/cython/_core.pyx":379
+    /* "pybase16384/backends/cython/_core.pyx":383
  *     elif ret == base16384_err_invalid_file_name:
  *         return "base16384_err_invalid_file_name"
  *     elif ret == base16384_err_invalid_commandline_parameter:             # <<<<<<<<<<<<<<
@@ -25250,7 +25285,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     break;
     case base16384_err_invalid_decoding_checksum:
 
-    /* "pybase16384/backends/cython/_core.pyx":382
+    /* "pybase16384/backends/cython/_core.pyx":386
  *         return "base16384_err_invalid_commandline_parameter"
  *     elif ret == base16384_err_invalid_decoding_checksum:
  *         return "base16384_err_invalid_decoding_checksum"             # <<<<<<<<<<<<<<
@@ -25262,7 +25297,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     __pyx_r = __pyx_n_u_base16384_err_invalid_decoding_c;
     goto __pyx_L0;
 
-    /* "pybase16384/backends/cython/_core.pyx":381
+    /* "pybase16384/backends/cython/_core.pyx":385
  *     elif ret == base16384_err_invalid_commandline_parameter:
  *         return "base16384_err_invalid_commandline_parameter"
  *     elif ret == base16384_err_invalid_decoding_checksum:             # <<<<<<<<<<<<<<
@@ -25273,7 +25308,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
     default: break;
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":362
+  /* "pybase16384/backends/cython/_core.pyx":366
  *     return pybase16384_64bits()
  * 
  * cdef inline str err_to_str(base16384_err_t ret):             # <<<<<<<<<<<<<<
@@ -25289,7 +25324,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_er
   return __pyx_r;
 }
 
-/* "pybase16384/backends/cython/_core.pyx":384
+/* "pybase16384/backends/cython/_core.pyx":388
  *         return "base16384_err_invalid_decoding_checksum"
  * 
  * cpdef inline encode_local_file(object inp, object out):             # <<<<<<<<<<<<<<
@@ -25333,31 +25368,31 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("encode_local_file", 1);
 
-  /* "pybase16384/backends/cython/_core.pyx":385
+  /* "pybase16384/backends/cython/_core.pyx":389
  * 
  * cpdef inline encode_local_file(object inp, object out):
  *     cdef bytes inp_name = ensure_bytes(inp)             # <<<<<<<<<<<<<<
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  */
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_inp); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 385, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_inp); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 389, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __pyx_v_inp_name = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pybase16384/backends/cython/_core.pyx":386
+  /* "pybase16384/backends/cython/_core.pyx":390
  * cpdef inline encode_local_file(object inp, object out):
  *     cdef bytes inp_name = ensure_bytes(inp)
  *     cdef bytes out_name = ensure_bytes(out)             # <<<<<<<<<<<<<<
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name
  */
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_out); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 386, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_out); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 390, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __pyx_v_out_name = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pybase16384/backends/cython/_core.pyx":387
+  /* "pybase16384/backends/cython/_core.pyx":391
  *     cdef bytes inp_name = ensure_bytes(inp)
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name             # <<<<<<<<<<<<<<
@@ -25366,12 +25401,12 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   if (unlikely(__pyx_v_inp_name == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "expected bytes, NoneType found");
-    __PYX_ERR(0, 387, __pyx_L1_error)
+    __PYX_ERR(0, 391, __pyx_L1_error)
   }
-  __pyx_t_2 = __Pyx_PyBytes_AsString(__pyx_v_inp_name); if (unlikely((!__pyx_t_2) && PyErr_Occurred())) __PYX_ERR(0, 387, __pyx_L1_error)
+  __pyx_t_2 = __Pyx_PyBytes_AsString(__pyx_v_inp_name); if (unlikely((!__pyx_t_2) && PyErr_Occurred())) __PYX_ERR(0, 391, __pyx_L1_error)
   __pyx_v_inp_name_ptr = ((char const *)__pyx_t_2);
 
-  /* "pybase16384/backends/cython/_core.pyx":388
+  /* "pybase16384/backends/cython/_core.pyx":392
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name             # <<<<<<<<<<<<<<
@@ -25380,12 +25415,12 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   if (unlikely(__pyx_v_out_name == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "expected bytes, NoneType found");
-    __PYX_ERR(0, 388, __pyx_L1_error)
+    __PYX_ERR(0, 392, __pyx_L1_error)
   }
-  __pyx_t_3 = __Pyx_PyBytes_AsString(__pyx_v_out_name); if (unlikely((!__pyx_t_3) && PyErr_Occurred())) __PYX_ERR(0, 388, __pyx_L1_error)
+  __pyx_t_3 = __Pyx_PyBytes_AsString(__pyx_v_out_name); if (unlikely((!__pyx_t_3) && PyErr_Occurred())) __PYX_ERR(0, 392, __pyx_L1_error)
   __pyx_v_out_name_ptr = ((char const *)__pyx_t_3);
 
-  /* "pybase16384/backends/cython/_core.pyx":389
+  /* "pybase16384/backends/cython/_core.pyx":393
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)             # <<<<<<<<<<<<<<
@@ -25394,7 +25429,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   __pyx_v_encbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_ENCBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":390
+  /* "pybase16384/backends/cython/_core.pyx":394
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
@@ -25404,16 +25439,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
   __pyx_t_4 = (__pyx_v_encbuf == NULL);
   if (unlikely(__pyx_t_4)) {
 
-    /* "pybase16384/backends/cython/_core.pyx":391
+    /* "pybase16384/backends/cython/_core.pyx":395
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 391, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 395, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":390
+    /* "pybase16384/backends/cython/_core.pyx":394
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
@@ -25422,7 +25457,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":392
+  /* "pybase16384/backends/cython/_core.pyx":396
  *     if encbuf == NULL:
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)             # <<<<<<<<<<<<<<
@@ -25431,7 +25466,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   __pyx_v_decbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_DECBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":393
+  /* "pybase16384/backends/cython/_core.pyx":397
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -25441,7 +25476,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
   __pyx_t_4 = (__pyx_v_decbuf == NULL);
   if (unlikely(__pyx_t_4)) {
 
-    /* "pybase16384/backends/cython/_core.pyx":394
+    /* "pybase16384/backends/cython/_core.pyx":398
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -25450,16 +25485,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
     PyMem_Free(__pyx_v_encbuf);
 
-    /* "pybase16384/backends/cython/_core.pyx":395
+    /* "pybase16384/backends/cython/_core.pyx":399
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef base16384_err_t ret
  *     try:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 395, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 399, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":393
+    /* "pybase16384/backends/cython/_core.pyx":397
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -25468,7 +25503,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":397
+  /* "pybase16384/backends/cython/_core.pyx":401
  *         raise MemoryError
  *     cdef base16384_err_t ret
  *     try:             # <<<<<<<<<<<<<<
@@ -25477,7 +25512,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   /*try:*/ {
 
-    /* "pybase16384/backends/cython/_core.pyx":398
+    /* "pybase16384/backends/cython/_core.pyx":402
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -25493,7 +25528,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
         #endif
         /*try:*/ {
 
-          /* "pybase16384/backends/cython/_core.pyx":399
+          /* "pybase16384/backends/cython/_core.pyx":403
  *     try:
  *         with nogil:
  *             ret = b14_encode_file(inp_name_ptr, out_name_ptr, encbuf, decbuf)             # <<<<<<<<<<<<<<
@@ -25503,7 +25538,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
           __pyx_v_ret = base16384_encode_file(__pyx_v_inp_name_ptr, __pyx_v_out_name_ptr, __pyx_v_encbuf, __pyx_v_decbuf);
         }
 
-        /* "pybase16384/backends/cython/_core.pyx":398
+        /* "pybase16384/backends/cython/_core.pyx":402
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -25522,7 +25557,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
         }
     }
 
-    /* "pybase16384/backends/cython/_core.pyx":400
+    /* "pybase16384/backends/cython/_core.pyx":404
  *         with nogil:
  *             ret = b14_encode_file(inp_name_ptr, out_name_ptr, encbuf, decbuf)
  *         if ret !=  base16384_err_ok:             # <<<<<<<<<<<<<<
@@ -25532,23 +25567,23 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     __pyx_t_4 = (__pyx_v_ret != base16384_err_ok);
     if (unlikely(__pyx_t_4)) {
 
-      /* "pybase16384/backends/cython/_core.pyx":401
+      /* "pybase16384/backends/cython/_core.pyx":405
  *             ret = b14_encode_file(inp_name_ptr, out_name_ptr, encbuf, decbuf)
  *         if ret !=  base16384_err_ok:
  *             raise ValueError(err_to_str(ret))             # <<<<<<<<<<<<<<
  *     finally:
  *         PyMem_Free(encbuf)
  */
-      __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 401, __pyx_L6_error)
+      __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 405, __pyx_L6_error)
       __Pyx_GOTREF(__pyx_t_1);
-      __pyx_t_5 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_1); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 401, __pyx_L6_error)
+      __pyx_t_5 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_1); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 405, __pyx_L6_error)
       __Pyx_GOTREF(__pyx_t_5);
       __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
       __Pyx_Raise(__pyx_t_5, 0, 0, 0);
       __Pyx_DECREF(__pyx_t_5); __pyx_t_5 = 0;
-      __PYX_ERR(0, 401, __pyx_L6_error)
+      __PYX_ERR(0, 405, __pyx_L6_error)
 
-      /* "pybase16384/backends/cython/_core.pyx":400
+      /* "pybase16384/backends/cython/_core.pyx":404
  *         with nogil:
  *             ret = b14_encode_file(inp_name_ptr, out_name_ptr, encbuf, decbuf)
  *         if ret !=  base16384_err_ok:             # <<<<<<<<<<<<<<
@@ -25558,7 +25593,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     }
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":403
+  /* "pybase16384/backends/cython/_core.pyx":407
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -25569,7 +25604,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     /*normal exit:*/{
       PyMem_Free(__pyx_v_encbuf);
 
-      /* "pybase16384/backends/cython/_core.pyx":404
+      /* "pybase16384/backends/cython/_core.pyx":408
  *     finally:
  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -25597,7 +25632,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
       __pyx_t_6 = __pyx_lineno; __pyx_t_7 = __pyx_clineno; __pyx_t_8 = __pyx_filename;
       {
 
-        /* "pybase16384/backends/cython/_core.pyx":403
+        /* "pybase16384/backends/cython/_core.pyx":407
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -25606,7 +25641,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
         PyMem_Free(__pyx_v_encbuf);
 
-        /* "pybase16384/backends/cython/_core.pyx":404
+        /* "pybase16384/backends/cython/_core.pyx":408
  *     finally:
  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -25632,7 +25667,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     __pyx_L7:;
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":384
+  /* "pybase16384/backends/cython/_core.pyx":388
  *         return "base16384_err_invalid_decoding_checksum"
  * 
  * cpdef inline encode_local_file(object inp, object out):             # <<<<<<<<<<<<<<
@@ -25713,7 +25748,7 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
           (void)__Pyx_Arg_NewRef_FASTCALL(values[0]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 384, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 388, __pyx_L3_error)
         else goto __pyx_L5_argtuple_error;
         CYTHON_FALLTHROUGH;
         case  1:
@@ -25721,14 +25756,14 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
           (void)__Pyx_Arg_NewRef_FASTCALL(values[1]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 384, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 388, __pyx_L3_error)
         else {
-          __Pyx_RaiseArgtupleInvalid("encode_local_file", 1, 2, 2, 1); __PYX_ERR(0, 384, __pyx_L3_error)
+          __Pyx_RaiseArgtupleInvalid("encode_local_file", 1, 2, 2, 1); __PYX_ERR(0, 388, __pyx_L3_error)
         }
       }
       if (unlikely(kw_args > 0)) {
         const Py_ssize_t kwd_pos_args = __pyx_nargs;
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "encode_local_file") < 0)) __PYX_ERR(0, 384, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "encode_local_file") < 0)) __PYX_ERR(0, 388, __pyx_L3_error)
       }
     } else if (unlikely(__pyx_nargs != 2)) {
       goto __pyx_L5_argtuple_error;
@@ -25741,7 +25776,7 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
   }
   goto __pyx_L6_skip;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("encode_local_file", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 384, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("encode_local_file", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 388, __pyx_L3_error)
   __pyx_L6_skip:;
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L3_error:;
@@ -25777,7 +25812,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_30encode_local_
   int __pyx_clineno = 0;
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   __Pyx_XDECREF(__pyx_r);
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_encode_local_file(__pyx_v_inp, __pyx_v_out, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 384, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_encode_local_file(__pyx_v_inp, __pyx_v_out, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 388, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __pyx_r = __pyx_t_1;
   __pyx_t_1 = 0;
@@ -25794,7 +25829,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_30encode_local_
   return __pyx_r;
 }
 
-/* "pybase16384/backends/cython/_core.pyx":406
+/* "pybase16384/backends/cython/_core.pyx":410
  *         PyMem_Free(decbuf)
  * 
  * cpdef inline decode_local_file(object inp, object out):             # <<<<<<<<<<<<<<
@@ -25838,31 +25873,31 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("decode_local_file", 1);
 
-  /* "pybase16384/backends/cython/_core.pyx":407
+  /* "pybase16384/backends/cython/_core.pyx":411
  * 
  * cpdef inline decode_local_file(object inp, object out):
  *     cdef bytes inp_name = ensure_bytes(inp)             # <<<<<<<<<<<<<<
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  */
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_inp); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 407, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_inp); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 411, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __pyx_v_inp_name = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pybase16384/backends/cython/_core.pyx":408
+  /* "pybase16384/backends/cython/_core.pyx":412
  * cpdef inline decode_local_file(object inp, object out):
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  *     cdef bytes out_name = ensure_bytes(out)             # <<<<<<<<<<<<<<
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name
  */
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_out); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 408, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_out); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 412, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __pyx_v_out_name = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pybase16384/backends/cython/_core.pyx":409
+  /* "pybase16384/backends/cython/_core.pyx":413
  *     cdef bytes inp_name = ensure_bytes(inp)
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name             # <<<<<<<<<<<<<<
@@ -25871,12 +25906,12 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   if (unlikely(__pyx_v_inp_name == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "expected bytes, NoneType found");
-    __PYX_ERR(0, 409, __pyx_L1_error)
+    __PYX_ERR(0, 413, __pyx_L1_error)
   }
-  __pyx_t_2 = __Pyx_PyBytes_AsString(__pyx_v_inp_name); if (unlikely((!__pyx_t_2) && PyErr_Occurred())) __PYX_ERR(0, 409, __pyx_L1_error)
+  __pyx_t_2 = __Pyx_PyBytes_AsString(__pyx_v_inp_name); if (unlikely((!__pyx_t_2) && PyErr_Occurred())) __PYX_ERR(0, 413, __pyx_L1_error)
   __pyx_v_inp_name_ptr = ((char const *)__pyx_t_2);
 
-  /* "pybase16384/backends/cython/_core.pyx":410
+  /* "pybase16384/backends/cython/_core.pyx":414
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name             # <<<<<<<<<<<<<<
@@ -25885,12 +25920,12 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   if (unlikely(__pyx_v_out_name == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "expected bytes, NoneType found");
-    __PYX_ERR(0, 410, __pyx_L1_error)
+    __PYX_ERR(0, 414, __pyx_L1_error)
   }
-  __pyx_t_3 = __Pyx_PyBytes_AsString(__pyx_v_out_name); if (unlikely((!__pyx_t_3) && PyErr_Occurred())) __PYX_ERR(0, 410, __pyx_L1_error)
+  __pyx_t_3 = __Pyx_PyBytes_AsString(__pyx_v_out_name); if (unlikely((!__pyx_t_3) && PyErr_Occurred())) __PYX_ERR(0, 414, __pyx_L1_error)
   __pyx_v_out_name_ptr = ((char const *)__pyx_t_3);
 
-  /* "pybase16384/backends/cython/_core.pyx":411
+  /* "pybase16384/backends/cython/_core.pyx":415
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)             # <<<<<<<<<<<<<<
@@ -25899,7 +25934,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   __pyx_v_encbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_ENCBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":412
+  /* "pybase16384/backends/cython/_core.pyx":416
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
@@ -25909,16 +25944,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
   __pyx_t_4 = (__pyx_v_encbuf == NULL);
   if (unlikely(__pyx_t_4)) {
 
-    /* "pybase16384/backends/cython/_core.pyx":413
+    /* "pybase16384/backends/cython/_core.pyx":417
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 413, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 417, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":412
+    /* "pybase16384/backends/cython/_core.pyx":416
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
@@ -25927,7 +25962,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":414
+  /* "pybase16384/backends/cython/_core.pyx":418
  *     if encbuf == NULL:
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)             # <<<<<<<<<<<<<<
@@ -25936,7 +25971,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   __pyx_v_decbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_DECBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":415
+  /* "pybase16384/backends/cython/_core.pyx":419
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -25946,7 +25981,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
   __pyx_t_4 = (__pyx_v_decbuf == NULL);
   if (unlikely(__pyx_t_4)) {
 
-    /* "pybase16384/backends/cython/_core.pyx":416
+    /* "pybase16384/backends/cython/_core.pyx":420
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -25955,16 +25990,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
     PyMem_Free(__pyx_v_encbuf);
 
-    /* "pybase16384/backends/cython/_core.pyx":417
+    /* "pybase16384/backends/cython/_core.pyx":421
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef base16384_err_t ret
  *     try:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 417, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 421, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":415
+    /* "pybase16384/backends/cython/_core.pyx":419
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -25973,7 +26008,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":419
+  /* "pybase16384/backends/cython/_core.pyx":423
  *         raise MemoryError
  *     cdef base16384_err_t ret
  *     try:             # <<<<<<<<<<<<<<
@@ -25982,7 +26017,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   /*try:*/ {
 
-    /* "pybase16384/backends/cython/_core.pyx":420
+    /* "pybase16384/backends/cython/_core.pyx":424
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -25998,7 +26033,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
         #endif
         /*try:*/ {
 
-          /* "pybase16384/backends/cython/_core.pyx":421
+          /* "pybase16384/backends/cython/_core.pyx":425
  *     try:
  *         with nogil:
  *             ret = b14_decode_file(inp_name_ptr, out_name_ptr, encbuf, decbuf)             # <<<<<<<<<<<<<<
@@ -26008,7 +26043,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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         }
 
-        /* "pybase16384/backends/cython/_core.pyx":420
+        /* "pybase16384/backends/cython/_core.pyx":424
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -26027,7 +26062,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
         }
     }
 
-    /* "pybase16384/backends/cython/_core.pyx":422
+    /* "pybase16384/backends/cython/_core.pyx":426
  *         with nogil:
  *             ret = b14_decode_file(inp_name_ptr, out_name_ptr, encbuf, decbuf)
  *         if ret !=  base16384_err_ok:             # <<<<<<<<<<<<<<
@@ -26037,23 +26072,23 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
     __pyx_t_4 = (__pyx_v_ret != base16384_err_ok);
     if (unlikely(__pyx_t_4)) {
 
-      /* "pybase16384/backends/cython/_core.pyx":423
+      /* "pybase16384/backends/cython/_core.pyx":427
  *             ret = b14_decode_file(inp_name_ptr, out_name_ptr, encbuf, decbuf)
  *         if ret !=  base16384_err_ok:
  *             raise ValueError(err_to_str(ret))             # <<<<<<<<<<<<<<
  *     finally:
  *         PyMem_Free(encbuf)
  */
-      __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 423, __pyx_L6_error)
+      __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 427, __pyx_L6_error)
       __Pyx_GOTREF(__pyx_t_1);
-      __pyx_t_5 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_1); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 423, __pyx_L6_error)
+      __pyx_t_5 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_1); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 427, __pyx_L6_error)
       __Pyx_GOTREF(__pyx_t_5);
       __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
       __Pyx_Raise(__pyx_t_5, 0, 0, 0);
       __Pyx_DECREF(__pyx_t_5); __pyx_t_5 = 0;
-      __PYX_ERR(0, 423, __pyx_L6_error)
+      __PYX_ERR(0, 427, __pyx_L6_error)
 
-      /* "pybase16384/backends/cython/_core.pyx":422
+      /* "pybase16384/backends/cython/_core.pyx":426
  *         with nogil:
  *             ret = b14_decode_file(inp_name_ptr, out_name_ptr, encbuf, decbuf)
  *         if ret !=  base16384_err_ok:             # <<<<<<<<<<<<<<
@@ -26063,7 +26098,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
     }
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":425
+  /* "pybase16384/backends/cython/_core.pyx":429
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -26074,7 +26109,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
     /*normal exit:*/{
       PyMem_Free(__pyx_v_encbuf);
 
-      /* "pybase16384/backends/cython/_core.pyx":426
+      /* "pybase16384/backends/cython/_core.pyx":430
  *     finally:
  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -26102,7 +26137,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
       __pyx_t_6 = __pyx_lineno; __pyx_t_7 = __pyx_clineno; __pyx_t_8 = __pyx_filename;
       {
 
-        /* "pybase16384/backends/cython/_core.pyx":425
+        /* "pybase16384/backends/cython/_core.pyx":429
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -26111,7 +26146,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
         PyMem_Free(__pyx_v_encbuf);
 
-        /* "pybase16384/backends/cython/_core.pyx":426
+        /* "pybase16384/backends/cython/_core.pyx":430
  *     finally:
  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -26137,7 +26172,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
     __pyx_L7:;
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-  /* "pybase16384/backends/cython/_core.pyx":406
+  /* "pybase16384/backends/cython/_core.pyx":410
  *         PyMem_Free(decbuf)
  * 
  * cpdef inline decode_local_file(object inp, object out):             # <<<<<<<<<<<<<<
@@ -26218,7 +26253,7 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
           (void)__Pyx_Arg_NewRef_FASTCALL(values[0]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 406, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 410, __pyx_L3_error)
         else goto __pyx_L5_argtuple_error;
         CYTHON_FALLTHROUGH;
         case  1:
@@ -26226,14 +26261,14 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
           (void)__Pyx_Arg_NewRef_FASTCALL(values[1]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 406, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 410, __pyx_L3_error)
         else {
-          __Pyx_RaiseArgtupleInvalid("decode_local_file", 1, 2, 2, 1); __PYX_ERR(0, 406, __pyx_L3_error)
+          __Pyx_RaiseArgtupleInvalid("decode_local_file", 1, 2, 2, 1); __PYX_ERR(0, 410, __pyx_L3_error)
         }
       }
       if (unlikely(kw_args > 0)) {
         const Py_ssize_t kwd_pos_args = __pyx_nargs;
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "decode_local_file") < 0)) __PYX_ERR(0, 406, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "decode_local_file") < 0)) __PYX_ERR(0, 410, __pyx_L3_error)
       }
     } else if (unlikely(__pyx_nargs != 2)) {
       goto __pyx_L5_argtuple_error;
@@ -26246,7 +26281,7 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
   }
   goto __pyx_L6_skip;
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-  __Pyx_RaiseArgtupleInvalid("decode_local_file", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 406, __pyx_L3_error)
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-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_decode_local_file(__pyx_v_inp, __pyx_v_out, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 406, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_decode_local_file(__pyx_v_inp, __pyx_v_out, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 410, __pyx_L1_error)
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 }
 
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+/* "pybase16384/backends/cython/_core.pyx":432
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@@ -26337,7 +26372,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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-  /* "pybase16384/backends/cython/_core.pyx":429
+  /* "pybase16384/backends/cython/_core.pyx":433
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@@ -26346,7 +26381,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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-  /* "pybase16384/backends/cython/_core.pyx":430
+  /* "pybase16384/backends/cython/_core.pyx":434
  * cpdef inline encode_fd(int inp, int out):
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@@ -26356,16 +26391,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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-    /* "pybase16384/backends/cython/_core.pyx":431
+    /* "pybase16384/backends/cython/_core.pyx":435
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  */
-    PyErr_NoMemory(); __PYX_ERR(0, 431, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 435, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":430
+    /* "pybase16384/backends/cython/_core.pyx":434
  * cpdef inline encode_fd(int inp, int out):
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@@ -26374,7 +26409,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":432
+  /* "pybase16384/backends/cython/_core.pyx":436
  *     if encbuf == NULL:
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@@ -26383,7 +26418,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   __pyx_v_decbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_DECBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":433
+  /* "pybase16384/backends/cython/_core.pyx":437
  *         raise MemoryError
  *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
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@@ -26393,7 +26428,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
   __pyx_t_1 = (__pyx_v_decbuf == NULL);
   if (unlikely(__pyx_t_1)) {
 
-    /* "pybase16384/backends/cython/_core.pyx":434
+    /* "pybase16384/backends/cython/_core.pyx":438
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@@ -26402,16 +26437,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
     PyMem_Free(__pyx_v_encbuf);
 
-    /* "pybase16384/backends/cython/_core.pyx":435
+    /* "pybase16384/backends/cython/_core.pyx":439
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef base16384_err_t ret
  *     try:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 435, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 439, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":433
+    /* "pybase16384/backends/cython/_core.pyx":437
  *         raise MemoryError
  *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -26420,7 +26455,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":437
+  /* "pybase16384/backends/cython/_core.pyx":441
  *         raise MemoryError
  *     cdef base16384_err_t ret
  *     try:             # <<<<<<<<<<<<<<
@@ -26429,7 +26464,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   /*try:*/ {
 
-    /* "pybase16384/backends/cython/_core.pyx":438
+    /* "pybase16384/backends/cython/_core.pyx":442
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  *     try:
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@@ -26445,7 +26480,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
         #endif
         /*try:*/ {
 
-          /* "pybase16384/backends/cython/_core.pyx":439
+          /* "pybase16384/backends/cython/_core.pyx":443
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  *             ret = b14_encode_fd(inp, out, encbuf, decbuf)             # <<<<<<<<<<<<<<
@@ -26455,7 +26490,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
           __pyx_v_ret = base16384_encode_fd(__pyx_v_inp, __pyx_v_out, __pyx_v_encbuf, __pyx_v_decbuf);
         }
 
-        /* "pybase16384/backends/cython/_core.pyx":438
+        /* "pybase16384/backends/cython/_core.pyx":442
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -26474,7 +26509,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
         }
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-    /* "pybase16384/backends/cython/_core.pyx":440
+    /* "pybase16384/backends/cython/_core.pyx":444
  *         with nogil:
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@@ -26484,23 +26519,23 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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-      /* "pybase16384/backends/cython/_core.pyx":441
+      /* "pybase16384/backends/cython/_core.pyx":445
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  *             raise ValueError(err_to_str(ret))             # <<<<<<<<<<<<<<
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-      __pyx_t_2 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 441, __pyx_L6_error)
+      __pyx_t_2 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 445, __pyx_L6_error)
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-      __pyx_t_3 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_2); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 441, __pyx_L6_error)
+      __pyx_t_3 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_2); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 445, __pyx_L6_error)
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       __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-      __PYX_ERR(0, 441, __pyx_L6_error)
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-      /* "pybase16384/backends/cython/_core.pyx":440
+      /* "pybase16384/backends/cython/_core.pyx":444
  *         with nogil:
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  *         if ret != base16384_err_ok:             # <<<<<<<<<<<<<<
@@ -26510,7 +26545,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     }
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":443
+  /* "pybase16384/backends/cython/_core.pyx":447
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -26521,7 +26556,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     /*normal exit:*/{
       PyMem_Free(__pyx_v_encbuf);
 
-      /* "pybase16384/backends/cython/_core.pyx":444
+      /* "pybase16384/backends/cython/_core.pyx":448
  *     finally:
  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -26549,7 +26584,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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       {
 
-        /* "pybase16384/backends/cython/_core.pyx":443
+        /* "pybase16384/backends/cython/_core.pyx":447
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -26558,7 +26593,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
         PyMem_Free(__pyx_v_encbuf);
 
-        /* "pybase16384/backends/cython/_core.pyx":444
+        /* "pybase16384/backends/cython/_core.pyx":448
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  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -26584,7 +26619,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     __pyx_L7:;
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-  /* "pybase16384/backends/cython/_core.pyx":428
+  /* "pybase16384/backends/cython/_core.pyx":432
  *         PyMem_Free(decbuf)
  * 
  * cpdef inline encode_fd(int inp, int out):             # <<<<<<<<<<<<<<
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         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 428, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 432, __pyx_L3_error)
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@@ -26671,14 +26706,14 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
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           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 428, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 432, __pyx_L3_error)
         else {
-          __Pyx_RaiseArgtupleInvalid("encode_fd", 1, 2, 2, 1); __PYX_ERR(0, 428, __pyx_L3_error)
+          __Pyx_RaiseArgtupleInvalid("encode_fd", 1, 2, 2, 1); __PYX_ERR(0, 432, __pyx_L3_error)
         }
       }
       if (unlikely(kw_args > 0)) {
         const Py_ssize_t kwd_pos_args = __pyx_nargs;
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "encode_fd") < 0)) __PYX_ERR(0, 428, __pyx_L3_error)
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@@ -26686,12 +26721,12 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
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-    __pyx_v_inp = __Pyx_PyInt_As_int(values[0]); if (unlikely((__pyx_v_inp == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 428, __pyx_L3_error)
-    __pyx_v_out = __Pyx_PyInt_As_int(values[1]); if (unlikely((__pyx_v_out == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 428, __pyx_L3_error)
+    __pyx_v_inp = __Pyx_PyInt_As_int(values[0]); if (unlikely((__pyx_v_inp == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 432, __pyx_L3_error)
+    __pyx_v_out = __Pyx_PyInt_As_int(values[1]); if (unlikely((__pyx_v_out == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 432, __pyx_L3_error)
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-  __Pyx_RaiseArgtupleInvalid("encode_fd", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 428, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("encode_fd", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 432, __pyx_L3_error)
   __pyx_L6_skip:;
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L3_error:;
@@ -26727,7 +26762,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_34encode_fd(CYT
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-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_encode_fd(__pyx_v_inp, __pyx_v_out, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 428, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_encode_fd(__pyx_v_inp, __pyx_v_out, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 432, __pyx_L1_error)
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@@ -26744,7 +26779,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_34encode_fd(CYT
   return __pyx_r;
 }
 
-/* "pybase16384/backends/cython/_core.pyx":446
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@@ -26782,7 +26817,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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-  /* "pybase16384/backends/cython/_core.pyx":447
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@@ -26791,7 +26826,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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-  /* "pybase16384/backends/cython/_core.pyx":448
+  /* "pybase16384/backends/cython/_core.pyx":452
  * cpdef inline decode_fd(int inp, int out):
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@@ -26801,16 +26836,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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-    /* "pybase16384/backends/cython/_core.pyx":449
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  */
-    PyErr_NoMemory(); __PYX_ERR(0, 449, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 453, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":448
+    /* "pybase16384/backends/cython/_core.pyx":452
  * cpdef inline decode_fd(int inp, int out):
  *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
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@@ -26819,7 +26854,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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   }
 
-  /* "pybase16384/backends/cython/_core.pyx":450
+  /* "pybase16384/backends/cython/_core.pyx":454
  *     if encbuf == NULL:
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  *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)             # <<<<<<<<<<<<<<
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   __pyx_v_decbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_DECBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":451
+  /* "pybase16384/backends/cython/_core.pyx":455
  *         raise MemoryError
  *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
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@@ -26838,7 +26873,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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-    /* "pybase16384/backends/cython/_core.pyx":452
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  *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
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@@ -26847,16 +26882,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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     PyMem_Free(__pyx_v_encbuf);
 
-    /* "pybase16384/backends/cython/_core.pyx":453
+    /* "pybase16384/backends/cython/_core.pyx":457
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef base16384_err_t ret
  *     try:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 453, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 457, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":451
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  *         raise MemoryError
  *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -26865,7 +26900,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":455
+  /* "pybase16384/backends/cython/_core.pyx":459
  *         raise MemoryError
  *     cdef base16384_err_t ret
  *     try:             # <<<<<<<<<<<<<<
@@ -26874,7 +26909,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   /*try:*/ {
 
-    /* "pybase16384/backends/cython/_core.pyx":456
+    /* "pybase16384/backends/cython/_core.pyx":460
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -26890,7 +26925,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
         #endif
         /*try:*/ {
 
-          /* "pybase16384/backends/cython/_core.pyx":457
+          /* "pybase16384/backends/cython/_core.pyx":461
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  *             ret = b14_decode_fd(inp, out, encbuf, decbuf)             # <<<<<<<<<<<<<<
@@ -26900,7 +26935,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
           __pyx_v_ret = base16384_decode_fd(__pyx_v_inp, __pyx_v_out, __pyx_v_encbuf, __pyx_v_decbuf);
         }
 
-        /* "pybase16384/backends/cython/_core.pyx":456
+        /* "pybase16384/backends/cython/_core.pyx":460
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -26919,7 +26954,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
         }
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-    /* "pybase16384/backends/cython/_core.pyx":458
+    /* "pybase16384/backends/cython/_core.pyx":462
  *         with nogil:
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  *         if ret != base16384_err_ok:             # <<<<<<<<<<<<<<
@@ -26929,23 +26964,23 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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-      /* "pybase16384/backends/cython/_core.pyx":459
+      /* "pybase16384/backends/cython/_core.pyx":463
  *             ret = b14_decode_fd(inp, out, encbuf, decbuf)
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  *             raise ValueError(err_to_str(ret))             # <<<<<<<<<<<<<<
  *     finally:
  *         PyMem_Free(encbuf)
  */
-      __pyx_t_2 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 459, __pyx_L6_error)
+      __pyx_t_2 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 463, __pyx_L6_error)
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-      __pyx_t_3 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_2); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 459, __pyx_L6_error)
+      __pyx_t_3 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_2); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 463, __pyx_L6_error)
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       __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-      __PYX_ERR(0, 459, __pyx_L6_error)
+      __PYX_ERR(0, 463, __pyx_L6_error)
 
-      /* "pybase16384/backends/cython/_core.pyx":458
+      /* "pybase16384/backends/cython/_core.pyx":462
  *         with nogil:
  *             ret = b14_decode_fd(inp, out, encbuf, decbuf)
  *         if ret != base16384_err_ok:             # <<<<<<<<<<<<<<
@@ -26955,7 +26990,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
     }
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":461
+  /* "pybase16384/backends/cython/_core.pyx":465
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -26966,7 +27001,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
     /*normal exit:*/{
       PyMem_Free(__pyx_v_encbuf);
 
-      /* "pybase16384/backends/cython/_core.pyx":462
+      /* "pybase16384/backends/cython/_core.pyx":466
  *     finally:
  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -26994,7 +27029,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
       __pyx_t_4 = __pyx_lineno; __pyx_t_5 = __pyx_clineno; __pyx_t_6 = __pyx_filename;
       {
 
-        /* "pybase16384/backends/cython/_core.pyx":461
+        /* "pybase16384/backends/cython/_core.pyx":465
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -27003,7 +27038,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
         PyMem_Free(__pyx_v_encbuf);
 
-        /* "pybase16384/backends/cython/_core.pyx":462
+        /* "pybase16384/backends/cython/_core.pyx":466
  *     finally:
  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -27029,7 +27064,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
     __pyx_L7:;
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":446
+  /* "pybase16384/backends/cython/_core.pyx":450
  *         PyMem_Free(decbuf)
  * 
  * cpdef inline decode_fd(int inp, int out):             # <<<<<<<<<<<<<<
@@ -27108,7 +27143,7 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
           (void)__Pyx_Arg_NewRef_FASTCALL(values[0]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 446, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 450, __pyx_L3_error)
         else goto __pyx_L5_argtuple_error;
         CYTHON_FALLTHROUGH;
         case  1:
@@ -27116,14 +27151,14 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
           (void)__Pyx_Arg_NewRef_FASTCALL(values[1]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 446, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 450, __pyx_L3_error)
         else {
-          __Pyx_RaiseArgtupleInvalid("decode_fd", 1, 2, 2, 1); __PYX_ERR(0, 446, __pyx_L3_error)
+          __Pyx_RaiseArgtupleInvalid("decode_fd", 1, 2, 2, 1); __PYX_ERR(0, 450, __pyx_L3_error)
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       }
       if (unlikely(kw_args > 0)) {
         const Py_ssize_t kwd_pos_args = __pyx_nargs;
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "decode_fd") < 0)) __PYX_ERR(0, 446, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "decode_fd") < 0)) __PYX_ERR(0, 450, __pyx_L3_error)
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       goto __pyx_L5_argtuple_error;
@@ -27131,12 +27166,12 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
       values[0] = __Pyx_Arg_FASTCALL(__pyx_args, 0);
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     }
-    __pyx_v_inp = __Pyx_PyInt_As_int(values[0]); if (unlikely((__pyx_v_inp == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 446, __pyx_L3_error)
-    __pyx_v_out = __Pyx_PyInt_As_int(values[1]); if (unlikely((__pyx_v_out == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 446, __pyx_L3_error)
+    __pyx_v_inp = __Pyx_PyInt_As_int(values[0]); if (unlikely((__pyx_v_inp == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 450, __pyx_L3_error)
+    __pyx_v_out = __Pyx_PyInt_As_int(values[1]); if (unlikely((__pyx_v_out == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 450, __pyx_L3_error)
   }
   goto __pyx_L6_skip;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("decode_fd", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 446, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("decode_fd", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 450, __pyx_L3_error)
   __pyx_L6_skip:;
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L3_error:;
@@ -27172,7 +27207,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_36decode_fd(CYT
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("decode_fd", 1);
   __Pyx_XDECREF(__pyx_r);
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_decode_fd(__pyx_v_inp, __pyx_v_out, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 446, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_decode_fd(__pyx_v_inp, __pyx_v_out, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 450, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __pyx_r = __pyx_t_1;
   __pyx_t_1 = 0;
@@ -27189,7 +27224,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_36decode_fd(CYT
   return __pyx_r;
 }
 
-/* "pybase16384/backends/cython/_core.pyx":465
+/* "pybase16384/backends/cython/_core.pyx":469
  * 
  * # detailed
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@@ -27233,31 +27268,31 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("encode_local_file_detailed", 1);
 
-  /* "pybase16384/backends/cython/_core.pyx":466
+  /* "pybase16384/backends/cython/_core.pyx":470
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  *     cdef const char * inp_name_ptr = <const char *> inp_name
  */
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_inp); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 466, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_inp); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 470, __pyx_L1_error)
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   __pyx_v_inp_name = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pybase16384/backends/cython/_core.pyx":467
+  /* "pybase16384/backends/cython/_core.pyx":471
  * cpdef inline encode_local_file_detailed(object inp, object out, int flag):
  *     cdef bytes inp_name = ensure_bytes(inp)
  *     cdef bytes out_name = ensure_bytes(out)             # <<<<<<<<<<<<<<
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  *     cdef const char * out_name_ptr = <const char *> out_name
  */
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_out); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 467, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_out); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 471, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __pyx_v_out_name = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pybase16384/backends/cython/_core.pyx":468
+  /* "pybase16384/backends/cython/_core.pyx":472
  *     cdef bytes inp_name = ensure_bytes(inp)
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name             # <<<<<<<<<<<<<<
@@ -27266,12 +27301,12 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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   if (unlikely(__pyx_v_inp_name == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "expected bytes, NoneType found");
-    __PYX_ERR(0, 468, __pyx_L1_error)
+    __PYX_ERR(0, 472, __pyx_L1_error)
   }
-  __pyx_t_2 = __Pyx_PyBytes_AsString(__pyx_v_inp_name); if (unlikely((!__pyx_t_2) && PyErr_Occurred())) __PYX_ERR(0, 468, __pyx_L1_error)
+  __pyx_t_2 = __Pyx_PyBytes_AsString(__pyx_v_inp_name); if (unlikely((!__pyx_t_2) && PyErr_Occurred())) __PYX_ERR(0, 472, __pyx_L1_error)
   __pyx_v_inp_name_ptr = ((char const *)__pyx_t_2);
 
-  /* "pybase16384/backends/cython/_core.pyx":469
+  /* "pybase16384/backends/cython/_core.pyx":473
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name             # <<<<<<<<<<<<<<
@@ -27280,12 +27315,12 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   if (unlikely(__pyx_v_out_name == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "expected bytes, NoneType found");
-    __PYX_ERR(0, 469, __pyx_L1_error)
+    __PYX_ERR(0, 473, __pyx_L1_error)
   }
-  __pyx_t_3 = __Pyx_PyBytes_AsString(__pyx_v_out_name); if (unlikely((!__pyx_t_3) && PyErr_Occurred())) __PYX_ERR(0, 469, __pyx_L1_error)
+  __pyx_t_3 = __Pyx_PyBytes_AsString(__pyx_v_out_name); if (unlikely((!__pyx_t_3) && PyErr_Occurred())) __PYX_ERR(0, 473, __pyx_L1_error)
   __pyx_v_out_name_ptr = ((char const *)__pyx_t_3);
 
-  /* "pybase16384/backends/cython/_core.pyx":470
+  /* "pybase16384/backends/cython/_core.pyx":474
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)             # <<<<<<<<<<<<<<
@@ -27294,7 +27329,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   __pyx_v_encbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_ENCBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":471
+  /* "pybase16384/backends/cython/_core.pyx":475
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
@@ -27304,16 +27339,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
   __pyx_t_4 = (__pyx_v_encbuf == NULL);
   if (unlikely(__pyx_t_4)) {
 
-    /* "pybase16384/backends/cython/_core.pyx":472
+    /* "pybase16384/backends/cython/_core.pyx":476
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 472, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 476, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":471
+    /* "pybase16384/backends/cython/_core.pyx":475
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
@@ -27322,7 +27357,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":473
+  /* "pybase16384/backends/cython/_core.pyx":477
  *     if encbuf == NULL:
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)             # <<<<<<<<<<<<<<
@@ -27331,7 +27366,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   __pyx_v_decbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_DECBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":474
+  /* "pybase16384/backends/cython/_core.pyx":478
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -27341,7 +27376,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
   __pyx_t_4 = (__pyx_v_decbuf == NULL);
   if (unlikely(__pyx_t_4)) {
 
-    /* "pybase16384/backends/cython/_core.pyx":475
+    /* "pybase16384/backends/cython/_core.pyx":479
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -27350,16 +27385,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
     PyMem_Free(__pyx_v_encbuf);
 
-    /* "pybase16384/backends/cython/_core.pyx":476
+    /* "pybase16384/backends/cython/_core.pyx":480
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef base16384_err_t ret
  *     try:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 476, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 480, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":474
+    /* "pybase16384/backends/cython/_core.pyx":478
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -27368,7 +27403,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":478
+  /* "pybase16384/backends/cython/_core.pyx":482
  *         raise MemoryError
  *     cdef base16384_err_t ret
  *     try:             # <<<<<<<<<<<<<<
@@ -27377,7 +27412,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
   /*try:*/ {
 
-    /* "pybase16384/backends/cython/_core.pyx":479
+    /* "pybase16384/backends/cython/_core.pyx":483
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -27393,7 +27428,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
         #endif
         /*try:*/ {
 
-          /* "pybase16384/backends/cython/_core.pyx":480
+          /* "pybase16384/backends/cython/_core.pyx":484
  *     try:
  *         with nogil:
  *             ret = b14_encode_file_detailed(inp_name_ptr, out_name_ptr, encbuf, decbuf, flag)             # <<<<<<<<<<<<<<
@@ -27403,7 +27438,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
           __pyx_v_ret = base16384_encode_file_detailed(__pyx_v_inp_name_ptr, __pyx_v_out_name_ptr, __pyx_v_encbuf, __pyx_v_decbuf, __pyx_v_flag);
         }
 
-        /* "pybase16384/backends/cython/_core.pyx":479
+        /* "pybase16384/backends/cython/_core.pyx":483
  *     cdef base16384_err_t ret
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@@ -27422,7 +27457,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
         }
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-    /* "pybase16384/backends/cython/_core.pyx":481
+    /* "pybase16384/backends/cython/_core.pyx":485
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@@ -27432,23 +27467,23 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
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-      /* "pybase16384/backends/cython/_core.pyx":482
+      /* "pybase16384/backends/cython/_core.pyx":486
  *             ret = b14_encode_file_detailed(inp_name_ptr, out_name_ptr, encbuf, decbuf, flag)
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  *             raise ValueError(err_to_str(ret))             # <<<<<<<<<<<<<<
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-      __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 482, __pyx_L6_error)
+      __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_err_to_str(__pyx_v_ret); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 486, __pyx_L6_error)
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-      __pyx_t_5 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_1); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 482, __pyx_L6_error)
+      __pyx_t_5 = __Pyx_PyObject_CallOneArg(__pyx_builtin_ValueError, __pyx_t_1); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 486, __pyx_L6_error)
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       __Pyx_DECREF(__pyx_t_5); __pyx_t_5 = 0;
-      __PYX_ERR(0, 482, __pyx_L6_error)
+      __PYX_ERR(0, 486, __pyx_L6_error)
 
-      /* "pybase16384/backends/cython/_core.pyx":481
+      /* "pybase16384/backends/cython/_core.pyx":485
  *         with nogil:
  *             ret = b14_encode_file_detailed(inp_name_ptr, out_name_ptr, encbuf, decbuf, flag)
  *         if ret !=  base16384_err_ok:             # <<<<<<<<<<<<<<
@@ -27458,7 +27493,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     }
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":484
+  /* "pybase16384/backends/cython/_core.pyx":488
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -27469,7 +27504,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     /*normal exit:*/{
       PyMem_Free(__pyx_v_encbuf);
 
-      /* "pybase16384/backends/cython/_core.pyx":485
+      /* "pybase16384/backends/cython/_core.pyx":489
  *     finally:
  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -27497,7 +27532,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
       __pyx_t_6 = __pyx_lineno; __pyx_t_7 = __pyx_clineno; __pyx_t_8 = __pyx_filename;
       {
 
-        /* "pybase16384/backends/cython/_core.pyx":484
+        /* "pybase16384/backends/cython/_core.pyx":488
  *             raise ValueError(err_to_str(ret))
  *     finally:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -27506,7 +27541,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
  */
         PyMem_Free(__pyx_v_encbuf);
 
-        /* "pybase16384/backends/cython/_core.pyx":485
+        /* "pybase16384/backends/cython/_core.pyx":489
  *     finally:
  *         PyMem_Free(encbuf)
  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
@@ -27532,7 +27567,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
     __pyx_L7:;
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-  /* "pybase16384/backends/cython/_core.pyx":465
+  /* "pybase16384/backends/cython/_core.pyx":469
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  * cpdef inline encode_local_file_detailed(object inp, object out, int flag):             # <<<<<<<<<<<<<<
@@ -27616,7 +27651,7 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
           (void)__Pyx_Arg_NewRef_FASTCALL(values[0]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 465, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 469, __pyx_L3_error)
         else goto __pyx_L5_argtuple_error;
         CYTHON_FALLTHROUGH;
         case  1:
@@ -27624,9 +27659,9 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
           (void)__Pyx_Arg_NewRef_FASTCALL(values[1]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 465, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 469, __pyx_L3_error)
         else {
-          __Pyx_RaiseArgtupleInvalid("encode_local_file_detailed", 1, 3, 3, 1); __PYX_ERR(0, 465, __pyx_L3_error)
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         case  2:
@@ -27634,14 +27669,14 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
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           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 465, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 469, __pyx_L3_error)
         else {
-          __Pyx_RaiseArgtupleInvalid("encode_local_file_detailed", 1, 3, 3, 2); __PYX_ERR(0, 465, __pyx_L3_error)
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         const Py_ssize_t kwd_pos_args = __pyx_nargs;
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "encode_local_file_detailed") < 0)) __PYX_ERR(0, 465, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "encode_local_file_detailed") < 0)) __PYX_ERR(0, 469, __pyx_L3_error)
       }
     } else if (unlikely(__pyx_nargs != 3)) {
       goto __pyx_L5_argtuple_error;
@@ -27652,11 +27687,11 @@ PyObject *__pyx_args, PyObject *__pyx_kwds
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     __pyx_v_inp = values[0];
     __pyx_v_out = values[1];
-    __pyx_v_flag = __Pyx_PyInt_As_int(values[2]); if (unlikely((__pyx_v_flag == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 465, __pyx_L3_error)
+    __pyx_v_flag = __Pyx_PyInt_As_int(values[2]); if (unlikely((__pyx_v_flag == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 469, __pyx_L3_error)
   }
   goto __pyx_L6_skip;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("encode_local_file_detailed", 1, 3, 3, __pyx_nargs); __PYX_ERR(0, 465, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("encode_local_file_detailed", 1, 3, 3, __pyx_nargs); __PYX_ERR(0, 469, __pyx_L3_error)
   __pyx_L6_skip:;
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L3_error:;
@@ -27692,7 +27727,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_38encode_local_
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("encode_local_file_detailed", 1);
   __Pyx_XDECREF(__pyx_r);
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_encode_local_file_detailed(__pyx_v_inp, __pyx_v_out, __pyx_v_flag, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 465, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_encode_local_file_detailed(__pyx_v_inp, __pyx_v_out, __pyx_v_flag, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 469, __pyx_L1_error)
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   __pyx_r = __pyx_t_1;
   __pyx_t_1 = 0;
@@ -27709,7 +27744,7 @@ static PyObject *__pyx_pf_11pybase16384_8backends_6cython_5_core_38encode_local_
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 }
 
-/* "pybase16384/backends/cython/_core.pyx":487
+/* "pybase16384/backends/cython/_core.pyx":491
  *         PyMem_Free(decbuf)
  * 
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@@ -27753,31 +27788,31 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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-  /* "pybase16384/backends/cython/_core.pyx":488
+  /* "pybase16384/backends/cython/_core.pyx":492
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  * cpdef inline decode_local_file_detailed(object inp, object out, int flag):
  *     cdef bytes inp_name = ensure_bytes(inp)             # <<<<<<<<<<<<<<
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-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_inp); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 488, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_inp); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 492, __pyx_L1_error)
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   __pyx_v_inp_name = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pybase16384/backends/cython/_core.pyx":489
+  /* "pybase16384/backends/cython/_core.pyx":493
  * cpdef inline decode_local_file_detailed(object inp, object out, int flag):
  *     cdef bytes inp_name = ensure_bytes(inp)
  *     cdef bytes out_name = ensure_bytes(out)             # <<<<<<<<<<<<<<
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name
  */
-  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_out); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 489, __pyx_L1_error)
+  __pyx_t_1 = __pyx_f_11pybase16384_8backends_6cython_5_core_ensure_bytes(__pyx_v_out); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 493, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __pyx_v_out_name = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pybase16384/backends/cython/_core.pyx":490
+  /* "pybase16384/backends/cython/_core.pyx":494
  *     cdef bytes inp_name = ensure_bytes(inp)
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name             # <<<<<<<<<<<<<<
@@ -27786,12 +27821,12 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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   if (unlikely(__pyx_v_inp_name == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "expected bytes, NoneType found");
-    __PYX_ERR(0, 490, __pyx_L1_error)
+    __PYX_ERR(0, 494, __pyx_L1_error)
   }
-  __pyx_t_2 = __Pyx_PyBytes_AsString(__pyx_v_inp_name); if (unlikely((!__pyx_t_2) && PyErr_Occurred())) __PYX_ERR(0, 490, __pyx_L1_error)
+  __pyx_t_2 = __Pyx_PyBytes_AsString(__pyx_v_inp_name); if (unlikely((!__pyx_t_2) && PyErr_Occurred())) __PYX_ERR(0, 494, __pyx_L1_error)
   __pyx_v_inp_name_ptr = ((char const *)__pyx_t_2);
 
-  /* "pybase16384/backends/cython/_core.pyx":491
+  /* "pybase16384/backends/cython/_core.pyx":495
  *     cdef bytes out_name = ensure_bytes(out)
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name             # <<<<<<<<<<<<<<
@@ -27800,12 +27835,12 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   if (unlikely(__pyx_v_out_name == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "expected bytes, NoneType found");
-    __PYX_ERR(0, 491, __pyx_L1_error)
+    __PYX_ERR(0, 495, __pyx_L1_error)
   }
-  __pyx_t_3 = __Pyx_PyBytes_AsString(__pyx_v_out_name); if (unlikely((!__pyx_t_3) && PyErr_Occurred())) __PYX_ERR(0, 491, __pyx_L1_error)
+  __pyx_t_3 = __Pyx_PyBytes_AsString(__pyx_v_out_name); if (unlikely((!__pyx_t_3) && PyErr_Occurred())) __PYX_ERR(0, 495, __pyx_L1_error)
   __pyx_v_out_name_ptr = ((char const *)__pyx_t_3);
 
-  /* "pybase16384/backends/cython/_core.pyx":492
+  /* "pybase16384/backends/cython/_core.pyx":496
  *     cdef const char * inp_name_ptr = <const char *> inp_name
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)             # <<<<<<<<<<<<<<
@@ -27814,7 +27849,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   __pyx_v_encbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_ENCBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":493
+  /* "pybase16384/backends/cython/_core.pyx":497
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
@@ -27824,16 +27859,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
   __pyx_t_4 = (__pyx_v_encbuf == NULL);
   if (unlikely(__pyx_t_4)) {
 
-    /* "pybase16384/backends/cython/_core.pyx":494
+    /* "pybase16384/backends/cython/_core.pyx":498
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 494, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 498, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":493
+    /* "pybase16384/backends/cython/_core.pyx":497
  *     cdef const char * out_name_ptr = <const char *> out_name
  *     cdef char * encbuf = <char*>PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
@@ -27842,7 +27877,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":495
+  /* "pybase16384/backends/cython/_core.pyx":499
  *     if encbuf == NULL:
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)             # <<<<<<<<<<<<<<
@@ -27851,7 +27886,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   __pyx_v_decbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_DECBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":496
+  /* "pybase16384/backends/cython/_core.pyx":500
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -27861,7 +27896,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
   __pyx_t_4 = (__pyx_v_decbuf == NULL);
   if (unlikely(__pyx_t_4)) {
 
-    /* "pybase16384/backends/cython/_core.pyx":497
+    /* "pybase16384/backends/cython/_core.pyx":501
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
@@ -27870,16 +27905,16 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
     PyMem_Free(__pyx_v_encbuf);
 
-    /* "pybase16384/backends/cython/_core.pyx":498
+    /* "pybase16384/backends/cython/_core.pyx":502
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)
  *         raise MemoryError             # <<<<<<<<<<<<<<
  *     cdef base16384_err_t ret
  *     try:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 498, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 502, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":496
+    /* "pybase16384/backends/cython/_core.pyx":500
  *         raise MemoryError
  *     cdef char * decbuf = <char*>PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
  *     if decbuf == NULL:             # <<<<<<<<<<<<<<
@@ -27888,7 +27923,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":500
+  /* "pybase16384/backends/cython/_core.pyx":504
  *         raise MemoryError
  *     cdef base16384_err_t ret
  *     try:             # <<<<<<<<<<<<<<
@@ -27897,7 +27932,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
  */
   /*try:*/ {
 
-    /* "pybase16384/backends/cython/_core.pyx":501
+    /* "pybase16384/backends/cython/_core.pyx":505
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -27913,7 +27948,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
         #endif
         /*try:*/ {
 
-          /* "pybase16384/backends/cython/_core.pyx":502
+          /* "pybase16384/backends/cython/_core.pyx":506
  *     try:
  *         with nogil:
  *             ret = b14_decode_file_detailed(inp_name_ptr, out_name_ptr, encbuf, decbuf, flag)             # <<<<<<<<<<<<<<
@@ -27923,7 +27958,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
           __pyx_v_ret = base16384_decode_file_detailed(__pyx_v_inp_name_ptr, __pyx_v_out_name_ptr, __pyx_v_encbuf, __pyx_v_decbuf, __pyx_v_flag);
         }
 
-        /* "pybase16384/backends/cython/_core.pyx":501
+        /* "pybase16384/backends/cython/_core.pyx":505
  *     cdef base16384_err_t ret
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
@@ -27942,7 +27977,7 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
         }
     }
 
-    /* "pybase16384/backends/cython/_core.pyx":503
+    /* "pybase16384/backends/cython/_core.pyx":507
  *         with nogil:
  *             ret = b14_decode_file_detailed(inp_name_ptr, out_name_ptr, encbuf, decbuf, flag)
  *         if ret !=  base16384_err_ok:             # <<<<<<<<<<<<<<
@@ -27952,23 +27987,23 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
     __pyx_t_4 = (__pyx_v_ret != base16384_err_ok);
     if (unlikely(__pyx_t_4)) {
 
-      /* "pybase16384/backends/cython/_core.pyx":504
+      /* "pybase16384/backends/cython/_core.pyx":508
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 PyObject *const *__pyx_args, Py_ssize_t __pyx_nargs, PyObject *__pyx_kwds
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+static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_encode_stream_detailed(PyObject *__pyx_v_inp, PyObject *__pyx_v_out, int __pyx_v_flag, CYTHON_UNUSED int __pyx_skip_dispatch) {
   char *__pyx_v_encbuf;
   char *__pyx_v_decbuf;
   base16384_err_t __pyx_v_ret;
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+  base16384_stream_t __pyx_v_outstream;
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-  char const *__pyx_t_6;
-  PyObject *__pyx_t_7 = NULL;
-  PyObject *__pyx_t_8 = NULL;
+  base16384_stream_t __pyx_t_2;
+  base16384_io_function_t __pyx_t_3;
+  PyObject *__pyx_t_4 = NULL;
+  PyObject *__pyx_t_5 = NULL;
+  int __pyx_t_6;
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- *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)             # <<<<<<<<<<<<<<
+ * cpdef inline encode_stream_detailed(object inp, object out, int flag):
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+  /* "pybase16384/backends/cython/_core.pyx":566
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  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
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- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
  */
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-    /* "pybase16384/backends/cython/_core.pyx":512
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  *         raise MemoryError             # <<<<<<<<<<<<<<
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
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- *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
+    /* "pybase16384/backends/cython/_core.pyx":566
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+ *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t> BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
  *         raise MemoryError
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":513
+  /* "pybase16384/backends/cython/_core.pyx":568
  *     if encbuf == NULL:
  *         raise MemoryError
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)             # <<<<<<<<<<<<<<
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)             # <<<<<<<<<<<<<<
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  */
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-  /* "pybase16384/backends/cython/_core.pyx":514
+  /* "pybase16384/backends/cython/_core.pyx":569
  *         raise MemoryError
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
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+    /* "pybase16384/backends/cython/_core.pyx":570
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  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
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- *     cdef base16384_err_t ret
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  *         PyMem_Free(encbuf)
  *         raise MemoryError             # <<<<<<<<<<<<<<
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  *     cdef base16384_err_t ret
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  */
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+    PyErr_NoMemory(); __PYX_ERR(0, 571, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":514
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  *         raise MemoryError
  */
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-  /* "pybase16384/backends/cython/_core.pyx":518
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+  /* "pybase16384/backends/cython/_core.pyx":575
  *     cdef base16384_err_t ret
+ * 
+ *     cdef base16384_stream_t inpstream = base16384_stream_t(f=base16384_io_function_t(reader=b14_readcallback),             # <<<<<<<<<<<<<<
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+ */
+  __pyx_t_3.reader = __pyx_f_11pybase16384_8backends_6cython_5_core_b14_readcallback;
+  __pyx_t_2.f = __pyx_t_3;
+
+  /* "pybase16384/backends/cython/_core.pyx":576
+ * 
+ *     cdef base16384_stream_t inpstream = base16384_stream_t(f=base16384_io_function_t(reader=b14_readcallback),
+ *                                                            client_data=<const void *> inp)             # <<<<<<<<<<<<<<
+ *     # inpstream.f.reader = b14_readcallback
+ *     # inpstream.client_data = <const void*>inp
+ */
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+  __pyx_v_inpstream = __pyx_t_2;
+
+  /* "pybase16384/backends/cython/_core.pyx":580
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+ * 
+ *     cdef base16384_stream_t outstream = base16384_stream_t(f=base16384_io_function_t(writer=b14_writecallback),             # <<<<<<<<<<<<<<
+ *                                                            client_data=<const void *> out)
+ *     # outstream.f.writer = b14_writecallback
+ */
+  __pyx_t_3.writer = __pyx_f_11pybase16384_8backends_6cython_5_core_b14_writecallback;
+  __pyx_t_2.f = __pyx_t_3;
+
+  /* "pybase16384/backends/cython/_core.pyx":581
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+ *     cdef base16384_stream_t outstream = base16384_stream_t(f=base16384_io_function_t(writer=b14_writecallback),
+ *                                                            client_data=<const void *> out)             # <<<<<<<<<<<<<<
+ *     # outstream.f.writer = b14_writecallback
+ *     # outstream.client_data = <const void*>out
+ */
+  __pyx_t_2.client_data = ((void const *)__pyx_v_out);
+  __pyx_v_outstream = __pyx_t_2;
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+  /* "pybase16384/backends/cython/_core.pyx":584
+ *     # outstream.f.writer = b14_writecallback
+ *     # outstream.client_data = <const void*>out
  *     try:             # <<<<<<<<<<<<<<
  *         with nogil:
- *             ret = b14_encode_fd_detailed(inp, out, encbuf, decbuf, flag)
+ *             ret = b14_encode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
  */
   /*try:*/ {
 
-    /* "pybase16384/backends/cython/_core.pyx":519
- *     cdef base16384_err_t ret
+    /* "pybase16384/backends/cython/_core.pyx":585
+ *     # outstream.client_data = <const void*>out
  *     try:
  *         with nogil:             # <<<<<<<<<<<<<<
- *             ret = b14_encode_fd_detailed(inp, out, encbuf, decbuf, flag)
+ *             ret = b14_encode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
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@@ -28375,21 +29636,21 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
         #endif
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-          /* "pybase16384/backends/cython/_core.pyx":520
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+ *             ret = b14_encode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)             # <<<<<<<<<<<<<<
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         }
 
-        /* "pybase16384/backends/cython/_core.pyx":519
- *     cdef base16384_err_t ret
+        /* "pybase16384/backends/cython/_core.pyx":585
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  *         with nogil:             # <<<<<<<<<<<<<<
- *             ret = b14_encode_fd_detailed(inp, out, encbuf, decbuf, flag)
+ *             ret = b14_encode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
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@@ -28404,9 +29665,9 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_en
         }
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-    /* "pybase16384/backends/cython/_core.pyx":521
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+ *             ret = b14_encode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
  *         if ret != base16384_err_ok:             # <<<<<<<<<<<<<<
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-      /* "pybase16384/backends/cython/_core.pyx":522
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+      /* "pybase16384/backends/cython/_core.pyx":588
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+      __Pyx_GOTREF(__pyx_t_4);
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+      __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
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+ *             ret = b14_encode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
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- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
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-    /* "pybase16384/backends/cython/_core.pyx":530
- *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
+    /* "pybase16384/backends/cython/_core.pyx":596
+ *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t> BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:
  *         raise MemoryError             # <<<<<<<<<<<<<<
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
  *     if decbuf == NULL:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 530, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 596, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":529
- * cpdef inline decode_fd_detailed(int inp, int out, int flag):
- *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t>BASE16384_ENCBUFSZ)
+    /* "pybase16384/backends/cython/_core.pyx":595
+ * cpdef inline decode_stream_detailed(object inp, object out, int flag):
+ *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t> BASE16384_ENCBUFSZ)
  *     if encbuf == NULL:             # <<<<<<<<<<<<<<
  *         raise MemoryError
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
  */
   }
 
-  /* "pybase16384/backends/cython/_core.pyx":531
+  /* "pybase16384/backends/cython/_core.pyx":597
  *     if encbuf == NULL:
  *         raise MemoryError
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)             # <<<<<<<<<<<<<<
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)             # <<<<<<<<<<<<<<
  *     if decbuf == NULL:
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  */
   __pyx_v_decbuf = ((char *)PyMem_Malloc(((size_t)BASE16384_DECBUFSZ)));
 
-  /* "pybase16384/backends/cython/_core.pyx":532
+  /* "pybase16384/backends/cython/_core.pyx":598
  *         raise MemoryError
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
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-    /* "pybase16384/backends/cython/_core.pyx":533
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+    /* "pybase16384/backends/cython/_core.pyx":599
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
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  *         PyMem_Free(encbuf)             # <<<<<<<<<<<<<<
  *         raise MemoryError
- *     cdef base16384_err_t ret
+ * 
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-    /* "pybase16384/backends/cython/_core.pyx":534
+    /* "pybase16384/backends/cython/_core.pyx":600
  *     if decbuf == NULL:
  *         PyMem_Free(encbuf)
  *         raise MemoryError             # <<<<<<<<<<<<<<
+ * 
  *     cdef base16384_err_t ret
- *     try:
  */
-    PyErr_NoMemory(); __PYX_ERR(0, 534, __pyx_L1_error)
+    PyErr_NoMemory(); __PYX_ERR(0, 600, __pyx_L1_error)
 
-    /* "pybase16384/backends/cython/_core.pyx":532
+    /* "pybase16384/backends/cython/_core.pyx":598
  *         raise MemoryError
- *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t>BASE16384_DECBUFSZ)
+ *     cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
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  *         PyMem_Free(encbuf)
  *         raise MemoryError
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-  /* "pybase16384/backends/cython/_core.pyx":536
- *         raise MemoryError
+  /* "pybase16384/backends/cython/_core.pyx":604
  *     cdef base16384_err_t ret
+ * 
+ *     cdef base16384_stream_t inpstream = base16384_stream_t(f=base16384_io_function_t(reader=b14_readcallback),client_data= <const void*>inp)             # <<<<<<<<<<<<<<
+ *     # inpstream.f.reader = b14_readcallback
+ *     # inpstream.client_data = <const void*>inp
+ */
+  __pyx_t_3.reader = __pyx_f_11pybase16384_8backends_6cython_5_core_b14_readcallback;
+  __pyx_t_2.f = __pyx_t_3;
+  __pyx_t_2.client_data = ((void const *)__pyx_v_inp);
+  __pyx_v_inpstream = __pyx_t_2;
+
+  /* "pybase16384/backends/cython/_core.pyx":608
+ *     # inpstream.client_data = <const void*>inp
+ * 
+ *     cdef base16384_stream_t outstream = base16384_stream_t(f=base16384_io_function_t(writer=b14_writecallback),client_data= <const void*>out)             # <<<<<<<<<<<<<<
+ *     # outstream.f.writer = b14_writecallback
+ *     # outstream.client_data = <const void*>out
+ */
+  __pyx_t_3.writer = __pyx_f_11pybase16384_8backends_6cython_5_core_b14_writecallback;
+  __pyx_t_2.f = __pyx_t_3;
+  __pyx_t_2.client_data = ((void const *)__pyx_v_out);
+  __pyx_v_outstream = __pyx_t_2;
+
+  /* "pybase16384/backends/cython/_core.pyx":611
+ *     # outstream.f.writer = b14_writecallback
+ *     # outstream.client_data = <const void*>out
  *     try:             # <<<<<<<<<<<<<<
  *         with nogil:
- *             ret = b14_decode_fd_detailed(inp, out, encbuf, decbuf, flag)
+ *             ret = b14_decode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
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-    /* "pybase16384/backends/cython/_core.pyx":537
- *     cdef base16384_err_t ret
+    /* "pybase16384/backends/cython/_core.pyx":612
+ *     # outstream.client_data = <const void*>out
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  *         with nogil:             # <<<<<<<<<<<<<<
- *             ret = b14_decode_fd_detailed(inp, out, encbuf, decbuf, flag)
+ *             ret = b14_decode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
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-          /* "pybase16384/backends/cython/_core.pyx":538
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-        /* "pybase16384/backends/cython/_core.pyx":537
- *     cdef base16384_err_t ret
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  *         with nogil:             # <<<<<<<<<<<<<<
- *             ret = b14_decode_fd_detailed(inp, out, encbuf, decbuf, flag)
+ *             ret = b14_decode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
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+    /* "pybase16384/backends/cython/_core.pyx":614
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+      /* "pybase16384/backends/cython/_core.pyx":615
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     }
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+  /* "pybase16384/backends/cython/_core.pyx":617
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-      /* "pybase16384/backends/cython/_core.pyx":543
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  *         PyMem_Free(decbuf)             # <<<<<<<<<<<<<<
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-        /* "pybase16384/backends/cython/_core.pyx":542
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-        /* "pybase16384/backends/cython/_core.pyx":543
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-        __Pyx_ExceptionReset(__pyx_t_10, __pyx_t_11, __pyx_t_12);
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-  /* "pybase16384/backends/cython/_core.pyx":527
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@@ -28980,9 +30269,9 @@ static CYTHON_INLINE PyObject *__pyx_f_11pybase16384_8backends_6cython_5_core_de
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+  /* "pybase16384/backends/cython/_core.pyx":564
+ *     return ret
+ * 
+ * cpdef inline encode_stream_detailed(object inp, object out, int flag):             # <<<<<<<<<<<<<<
+ *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t> BASE16384_ENCBUFSZ)
+ *     if encbuf == NULL:
+ */
+  __pyx_t_5 = __Pyx_CyFunction_New(&__pyx_mdef_11pybase16384_8backends_6cython_5_core_47encode_stream_detailed, 0, __pyx_n_s_encode_stream_detailed, NULL, __pyx_n_s_pybase16384_backends_cython__cor_2, __pyx_d, ((PyObject *)__pyx_codeobj__56)); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 564, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_5);
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_encode_stream_detailed, __pyx_t_5) < 0) __PYX_ERR(0, 564, __pyx_L1_error)
+  __Pyx_DECREF(__pyx_t_5); __pyx_t_5 = 0;
+
+  /* "pybase16384/backends/cython/_core.pyx":593
+ *         PyMem_Free(decbuf)
+ * 
+ * cpdef inline decode_stream_detailed(object inp, object out, int flag):             # <<<<<<<<<<<<<<
+ *     cdef char * encbuf = <char *> PyMem_Malloc(<size_t> BASE16384_ENCBUFSZ)
+ *     if encbuf == NULL:
+ */
+  __pyx_t_5 = __Pyx_CyFunction_New(&__pyx_mdef_11pybase16384_8backends_6cython_5_core_49decode_stream_detailed, 0, __pyx_n_s_decode_stream_detailed, NULL, __pyx_n_s_pybase16384_backends_cython__cor_2, __pyx_d, ((PyObject *)__pyx_codeobj__57)); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 593, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_5);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_decode_fd_detailed, __pyx_t_5) < 0) __PYX_ERR(0, 527, __pyx_L1_error)
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_decode_stream_detailed, __pyx_t_5) < 0) __PYX_ERR(0, 593, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_5); __pyx_t_5 = 0;
 
   /* "pybase16384/backends/cython/_core.pyx":1
  * # cython: language_level=3             # <<<<<<<<<<<<<<
  * # cython: cdivision=True
- * from cpython.bytes cimport PyBytes_AS_STRING, PyBytes_Check, PyBytes_Size
+ * from cpython.bytes cimport (PyBytes_AS_STRING, PyBytes_Check,
  */
   __pyx_t_5 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 1, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_5);
@@ -39393,7 +40730,7 @@ __Pyx_PyType_GetName(PyTypeObject* tp)
     if (unlikely(name == NULL) || unlikely(!PyUnicode_Check(name))) {
         PyErr_Clear();
         Py_XDECREF(name);
-        name = __Pyx_NewRef(__pyx_n_s__56);
+        name = __Pyx_NewRef(__pyx_n_s__58);
     }
     return name;
 }
diff --git a/pybase16384/backends/cython/_core.pyx b/pybase16384/backends/cython/_core.pyx
index d08e915..d76e29c 100644
--- a/pybase16384/backends/cython/_core.pyx
+++ b/pybase16384/backends/cython/_core.pyx
@@ -1,24 +1,28 @@
 # cython: language_level=3
 # cython: cdivision=True
-from cpython.bytes cimport PyBytes_AS_STRING, PyBytes_Check, PyBytes_Size
+from cpython.bytes cimport (PyBytes_AS_STRING, PyBytes_Check,
+                            PyBytes_FromStringAndSize, PyBytes_GET_SIZE)
 from cpython.mem cimport PyMem_Free, PyMem_Malloc
-from cpython.object cimport PyObject_HasAttrString
+from cpython.object cimport PyObject, PyObject_HasAttrString
 from libc.stdint cimport int32_t, uint8_t
+from libc.string cimport memcpy
 
 from pybase16384.backends.cython.base16384 cimport (
     BASE16384_DECBUFSZ, BASE16384_ENCBUFSZ,
     BASE16384_FLAG_DO_SUM_CHECK_FORCELY, BASE16384_FLAG_NOHEADER,
     BASE16384_FLAG_SUM_CHECK_ON_REMAIN, b14_decode, b14_decode_fd,
     b14_decode_fd_detailed, b14_decode_file, b14_decode_file_detailed,
-    b14_decode_len, b14_decode_safe, b14_encode, b14_encode_fd,
+    b14_decode_len, b14_decode_safe, b14_decode_stream,
+    b14_decode_stream_detailed, b14_encode, b14_encode_fd,
     b14_encode_fd_detailed, b14_encode_file, b14_encode_file_detailed,
-    b14_encode_len, b14_encode_safe, base16384_err_fopen_input_file,
+    b14_encode_len, b14_encode_safe, b14_encode_stream,
+    b14_encode_stream_detailed, base16384_err_fopen_input_file,
     base16384_err_fopen_output_file, base16384_err_get_file_size,
     base16384_err_invalid_commandline_parameter,
-    base16384_err_invalid_decoding_checksum, base16384_err_invalid_file_name,
+    base16384_err_invalid_decoding_checksum, base16384_err_invalid_file_name,base16384_io_function_t,
     base16384_err_map_input_file, base16384_err_ok,
     base16384_err_open_input_file, base16384_err_read_file, base16384_err_t,
-    base16384_err_write_file, pybase16384_64bits)
+    base16384_err_write_file, base16384_stream_t, pybase16384_64bits)
 
 from pathlib import Path
 
@@ -189,7 +193,7 @@ def encode_file(object input,
                 first_check = 0
                 if not PyBytes_Check(chunk):
                     raise TypeError(f"input must be a file-like rb object, got {type(input).__name__}")
-            size = PyBytes_Size(chunk)
+            size = PyBytes_GET_SIZE(chunk)
             if <int32_t> size < current_buf_len:  # 数据不够了 要减小一次读取的量
                 if buf_rate > 1:  # 重新设置一次读取的大小 重新设置流的位置 当然要是已经是一次读取7字节了 那就不能再变小了 直接encode吧
                     buf_rate = buf_rate / 2
@@ -236,7 +240,7 @@ def encode_file_safe(object input,
                 first_check = 0
                 if not PyBytes_Check(chunk):
                     raise TypeError(f"input must be a file-like rb object, got {type(input).__name__}")
-            size = PyBytes_Size(chunk)
+            size = PyBytes_GET_SIZE(chunk)
             if <int32_t> size < current_buf_len:  # 数据不够了 要减小一次读取的量
                 if buf_rate > 1:  # 重新设置一次读取的大小 重新设置流的位置 当然要是已经是一次读取7字节了 那就不能再变小了 直接encode吧
                     buf_rate = buf_rate / 2
@@ -281,7 +285,7 @@ def decode_file(object input,
     try:
         while True:
             chunk = input.read(current_buf_len)  # 8的倍数
-            size = PyBytes_Size(chunk)
+            size = PyBytes_GET_SIZE(chunk)
             if size == 0:
                 break
             if <int32_t> size < current_buf_len:  # 长度不够了
@@ -291,7 +295,7 @@ def decode_file(object input,
                     input.seek(-size, 1)
                     continue
             tmp = input.read(2)  # type: bytes
-            if PyBytes_Size(tmp) == 2:
+            if PyBytes_GET_SIZE(tmp) == 2:
                 if tmp[0] == 61:  # = stream完了   一次解码8n+2个字节
                     chunk += tmp
                     size += 2
@@ -333,7 +337,7 @@ def decode_file_safe(object input,
     try:
         while True:
             chunk = input.read(current_buf_len)  # 8的倍数
-            size = PyBytes_Size(chunk)
+            size = PyBytes_GET_SIZE(chunk)
             if size == 0:
                 break
             if <int32_t> size < current_buf_len:  # 长度不够了
@@ -343,7 +347,7 @@ def decode_file_safe(object input,
                     input.seek(-size, 1)
                     continue
             tmp = input.read(2)  # type: bytes
-            if PyBytes_Size(tmp) == 2:
+            if PyBytes_GET_SIZE(tmp) == 2:
                 if tmp[0] == 61:  # = stream完了   一次解码8n+2个字节
                     chunk += tmp
                     size += 2
@@ -541,3 +545,74 @@ cpdef inline decode_fd_detailed(int inp, int out, int flag):
     finally:
         PyMem_Free(encbuf)
         PyMem_Free(decbuf)
+
+# stream
+cdef ssize_t b14_readcallback(const void *client_data, void *buffer, size_t count) except -100  with gil:
+    cdef object file = <object><PyObject*>client_data
+    cdef bytes data = file.read(count)
+    cdef char* data_ptr = PyBytes_AS_STRING(data)
+    cdef ssize_t data_size = <ssize_t>PyBytes_GET_SIZE(data)
+    memcpy(buffer, data_ptr, <size_t>data_size)
+    return data_size
+
+cdef ssize_t b14_writecallback(const void *client_data, const void *buffer, size_t count) except -100 with gil:
+    cdef object file = <object> <PyObject *> client_data
+    cdef bytes data = PyBytes_FromStringAndSize(<char*>buffer, <Py_ssize_t>count)
+    cdef ssize_t ret = <ssize_t>file.write(data)
+    return ret
+
+cpdef inline encode_stream_detailed(object inp, object out, int flag):
+    cdef char * encbuf = <char *> PyMem_Malloc(<size_t> BASE16384_ENCBUFSZ)
+    if encbuf == NULL:
+        raise MemoryError
+    cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
+    if decbuf == NULL:
+        PyMem_Free(encbuf)
+        raise MemoryError
+
+    cdef base16384_err_t ret
+
+    cdef base16384_stream_t inpstream = base16384_stream_t(f=base16384_io_function_t(reader=b14_readcallback),
+                                                           client_data=<const void *> inp)
+    # inpstream.f.reader = b14_readcallback
+    # inpstream.client_data = <const void*>inp
+
+    cdef base16384_stream_t outstream = base16384_stream_t(f=base16384_io_function_t(writer=b14_writecallback),
+                                                           client_data=<const void *> out)
+    # outstream.f.writer = b14_writecallback
+    # outstream.client_data = <const void*>out
+    try:
+        with nogil:
+            ret = b14_encode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
+        if ret != base16384_err_ok:
+            raise ValueError(err_to_str(ret))
+    finally:
+        PyMem_Free(encbuf)
+        PyMem_Free(decbuf)
+
+cpdef inline decode_stream_detailed(object inp, object out, int flag):
+    cdef char * encbuf = <char *> PyMem_Malloc(<size_t> BASE16384_ENCBUFSZ)
+    if encbuf == NULL:
+        raise MemoryError
+    cdef char * decbuf = <char *> PyMem_Malloc(<size_t> BASE16384_DECBUFSZ)
+    if decbuf == NULL:
+        PyMem_Free(encbuf)
+        raise MemoryError
+
+    cdef base16384_err_t ret
+
+    cdef base16384_stream_t inpstream = base16384_stream_t(f=base16384_io_function_t(reader=b14_readcallback),client_data= <const void*>inp)
+    # inpstream.f.reader = b14_readcallback
+    # inpstream.client_data = <const void*>inp
+
+    cdef base16384_stream_t outstream = base16384_stream_t(f=base16384_io_function_t(writer=b14_writecallback),client_data= <const void*>out)
+    # outstream.f.writer = b14_writecallback
+    # outstream.client_data = <const void*>out
+    try:
+        with nogil:
+            ret = b14_decode_stream_detailed(&inpstream, &outstream, encbuf, decbuf, flag)
+        if ret != base16384_err_ok:
+            raise ValueError(err_to_str(ret))
+    finally:
+        PyMem_Free(encbuf)
+        PyMem_Free(decbuf)
\ No newline at end of file
diff --git a/pybase16384/backends/cython/base16384.pxd b/pybase16384/backends/cython/base16384.pxd
index d4c2b72..8775b15 100644
--- a/pybase16384/backends/cython/base16384.pxd
+++ b/pybase16384/backends/cython/base16384.pxd
@@ -85,7 +85,22 @@ cdef extern from "base16384.h" nogil:
     # base16384_decode_fd_detailed decodes input fd to output fd.
     #    encbuf & decbuf must be no less than BASE16384_ENCBUFSZ & BASE16384_DECBUFSZ
     base16384_err_t b14_decode_fd_detailed "base16384_decode_fd_detailed" (int input, int output, char* encbuf, char* decbuf, int flag)
-
+    # stream
+    ctypedef ssize_t (*base16384_reader_t) (const void *client_data, void *buffer, size_t count) except -100
+    ctypedef ssize_t (*base16384_writer_t) (const void *client_data, const void *buffer, size_t count) except -100
+
+    ctypedef union base16384_io_function_t:
+        base16384_reader_t reader
+        base16384_writer_t writer
+
+    ctypedef struct base16384_stream_t:
+        const base16384_io_function_t f
+        const void* client_data
+
+    base16384_err_t b14_encode_stream "base16384_encode_stream"(base16384_stream_t* input, base16384_stream_t*  output, char* encbuf, char* decbuf)
+    base16384_err_t b14_encode_stream_detailed "base16384_encode_stream_detailed"(base16384_stream_t* input, base16384_stream_t*  output, char* encbuf, char* decbuf, int flag)
+    base16384_err_t b14_decode_stream "base16384_decode_stream"(base16384_stream_t* input, base16384_stream_t*  output, char* encbuf, char* decbuf)
+    base16384_err_t b14_decode_stream_detailed "base16384_decode_stream_detailed"(base16384_stream_t* input, base16384_stream_t*  output, char* encbuf, char* decbuf, int flag)
 
 cdef extern from * nogil:
     """
diff --git a/setup.py b/setup.py
index e2c6069..b8273fc 100644
--- a/setup.py
+++ b/setup.py
@@ -62,6 +62,7 @@ def build_extensions(self):
             "pybase16384/backends/cython/_core.pyx",
             f"./base16384/base14{CPUBIT}.c",
             "./base16384/file.c",
+            "./base16384/wrap.c",
         ],
         include_dirs=[f"./base16384"],
         library_dirs=[f"./base16384"],
diff --git a/tests/test_bench.py b/tests/test_bench.py
new file mode 100644
index 0000000..c30e9fd
--- /dev/null
+++ b/tests/test_bench.py
@@ -0,0 +1,109 @@
+# -*- coding: utf-8 -*
+# From https://gist.github.com/mnixry/3608d0207196b847887d34ace8feeb87
+encoding, decoding = (
+    lambda input_bytes: (
+        "".join(
+            chr(0x4E00 + sum(1 << i for i, bit in enumerate(reversed(row)) if bit))
+            for row in (
+                lambda x, length: (
+                    tuple(next(it, None) for it in x) for _ in range(length)
+                )
+            )(
+                [((char >> i) & 1 for char in input_bytes for i in reversed(range(8)))]
+                * 14,
+                len(input_bytes) * 4 // 7 + (1 if len(input_bytes) * 4 % 7 else 0),
+            )
+        )
+        + (chr(0x3D00 + len(input_bytes) % 7) if len(input_bytes) % 7 else "")
+    ),
+    lambda input_string: bytes(
+        sum(1 << i for i, bit in enumerate(reversed(row)) if bit)
+        for row in (
+            lambda raw_string, residue: (
+                lambda x, length: (
+                    tuple(next(it, None) for it in x) for _ in range(length)
+                )
+            )(
+                [
+                    (
+                        (char >> i) & 1
+                        for char in (ord(i) - 0x4E00 for i in raw_string)
+                        for i in reversed(range(14))
+                    )
+                ]
+                * 8,
+                (len(raw_string) - 1) // 4 * 7 + (residue or 7),
+            )
+        )(
+            input_string[
+                : None
+                if input_string and 0x4E00 <= ord(input_string[-1]) <= 0x8DFF
+                else -1
+            ],
+            (
+                ord(input_string[-1]) - 0x3D00
+                if input_string and 0 <= ord(input_string[-1]) - 0x3D00 < 8
+                else 0
+            ),
+        )
+    ),
+)
+
+import sys
+
+sys.path.append(".")
+import time
+import unittest
+from random import randint
+from unittest import TestCase
+
+import pybase16384 as bs
+
+
+class TestBench(TestCase):
+    def test_bench(self):
+        start = time.time()
+        value = b"="
+        for i in range(1000):
+            value += b"x"
+            self.assertEqual(bs.decode_safe(bs.encode_safe(value)), value)
+        end = time.time()
+        print(f"C extension tooks {end - start} seconds")
+
+        start = time.time()
+        value = b"="
+        for i in range(1000):
+            value += b"x"
+            self.assertEqual(decoding(encoding(value)), value)
+        end = time.time()
+        print(f"Pure python tooks {end - start} seconds")
+
+    def test_bench2(self):
+        value = b"xxx" * 1000000
+        start = time.time()
+        self.assertEqual(bs.decode_safe(bs.encode_safe(value)), value)
+        end = time.time()
+        ctime = end - start
+        print(f"C extension tooks {ctime} seconds")
+
+        start = time.time()
+        buffer = bytearray(bs.encode_len(len(value)))
+        buffer_updated = bs._encode_into_safe(value, buffer)
+        buffer2 = bytearray(bs.decode_len(buffer_updated, 0))
+        buffer_updated2 = bs._decode_into_safe(buffer[:buffer_updated], buffer2)
+        end = time.time()
+        self.assertEqual(bytes(buffer2[:buffer_updated2]), value)
+        cztime = end - start
+        print(f"C extension zerocopy tooks {cztime} seconds")
+
+        start = time.time()
+        self.assertEqual(decoding(encoding(value)), value)
+        end = time.time()
+        pytime = end - start
+        print(f"Pure python tooks {pytime} seconds")
+
+        print(f"C extension zerocopy is {pytime/cztime} times faster than pure python")
+
+
+if __name__ == "__main__":
+    unittest.main()