initial implementation of persistence; tests TODO; refactoring TODO

Author: alimanfoo

.gitignore

@@ -64,3 +64,6 @@ zarr/*.c
 
 # setuptools-scm
 zarr/version.py
+
+# test data
+*.zarr

zarr/__init__.py

@@ -2,7 +2,8 @@
 from __future__ import absolute_import, print_function, division
 
 
-from zarr.ext import Chunk, Array, SynchronizedChunk, blosc_version
+from zarr.ext import Chunk, Array, SynchronizedChunk, blosc_version, \
+    PersistentChunk, PersistentArray
 from zarr.core import empty, zeros, ones, full, array
 from zarr import defaults
 from zarr.version import version as __version__

zarr/ext.pxd

@@ -16,6 +16,22 @@ cdef class Chunk:
     cdef decompress(self, char *dest)
 
 
+# TODO remove code duplication with Chunk class
+cdef class PersistentChunk:
+    cdef public object path
+    cdef public object fill_value
+    cdef public char *cname
+    cdef public int clevel
+    cdef public int shuffle
+    cdef public tuple shape
+    cdef public dtype dtype
+    cdef read_header(self)
+    cdef read(self)
+    cdef write(self, bytes data)
+    cdef compress(self, ndarray array)
+    cdef decompress(self, char *dest)
+
+
 cdef class SynchronizedChunk(Chunk):
     cdef object lock
 
@@ -30,3 +46,17 @@ cdef class Array:
     cdef public ndarray cdata
     cdef public object fill_value
     cdef public bint synchronized
+
+
+# TODO remove code duplication with Array class
+cdef class PersistentArray:
+    cdef public bytes cname
+    cdef public int clevel
+    cdef public int shuffle
+    cdef public tuple shape
+    cdef public tuple chunks
+    cdef public dtype dtype
+    cdef public object mode
+    cdef public ndarray cdata
+    cdef public object fill_value
+    cdef public bint synchronized