Added serializing into bytes object

src/cdatrie.pxd

@@ -54,6 +54,10 @@ cdef extern from "../libdatrie/datrie/trie.h":
 
     int trie_fwrite (Trie *trie, stdio.FILE *file)
 
+    size_t  trie_get_serialized_size (Trie *trie);
+
+    void     trie_serialize (Trie *trie, unsigned char *ptr);
+
     bint trie_is_dirty (Trie *trie)
 
 

src/datrie.pyx

@@ -6,6 +6,7 @@ Cython wrapper for libdatrie.
 from cpython.version cimport PY_MAJOR_VERSION
 from cython.operator import dereference as deref
 from libc.stdlib cimport malloc, free
+from cpython.mem cimport PyMem_Malloc, PyMem_Realloc, PyMem_Free
 from libc cimport stdio
 from libc cimport string
 cimport stdio_ext
@@ -129,6 +130,16 @@ cdef class BaseTrie:
 
         stdio.fflush(f_ptr)
 
+    def __bytes__(self):
+        cdef Py_ssize_t size = cdatrie.trie_get_serialized_size(self._c_trie)
+        cdef unsigned char* data = <unsigned char*> PyMem_Malloc(size)
+        try:
+            cdatrie.trie_serialize (self._c_trie, data)
+            return <bytes> data[:size]
+        finally:
+            PyMem_Free(data)
+        return res
+
     @classmethod
     def load(cls, path):
         """