Factor context initialisation from unpackb and Unpacker

Author: jnothman

msgpack/_msgpack.pyx

@@ -213,6 +213,32 @@ cdef extern from "unpack.h":
     void template_init(template_context* ctx)
     object template_data(template_context* ctx)
 
+cdef inline init_ctx(template_context *ctx, object object_hook, object list_hook, bint use_list, encoding, unicode_errors):
+    template_init(ctx)
+    ctx.user.use_list = use_list
+    ctx.user.object_hook = ctx.user.list_hook = <PyObject*>NULL
+    if object_hook is not None:
+        if not PyCallable_Check(object_hook):
+            raise TypeError("object_hook must be a callable.")
+        ctx.user.object_hook = <PyObject*>object_hook
+    if list_hook is not None:
+        if not PyCallable_Check(list_hook):
+            raise TypeError("list_hook must be a callable.")
+        ctx.user.list_hook = <PyObject*>list_hook
+    if encoding is None:
+        ctx.user.encoding = NULL
+        ctx.user.unicode_errors = NULL
+    else:
+        if isinstance(encoding, unicode):
+            _bencoding = encoding.encode('ascii')
+        else:
+            _bencoding = encoding
+        ctx.user.encoding = PyBytes_AsString(_bencoding)
+        if isinstance(unicode_errors, unicode):
+            _berrors = unicode_errors.encode('ascii')
+        else:
+            _berrors = unicode_errors
+        ctx.user.unicode_errors = PyBytes_AsString(_berrors)
 
 def unpackb(object packed, object object_hook=None, object list_hook=None,
             bint use_list=0, encoding=None, unicode_errors="strict",
@@ -229,34 +255,7 @@ def unpackb(object packed, object object_hook=None, object list_hook=None,
     cdef Py_ssize_t buf_len
     PyObject_AsReadBuffer(packed, <const_void_ptr*>&buf, &buf_len)
 
-    if encoding is None:
-        enc = NULL
-        err = NULL
-    else:
-        if isinstance(encoding, unicode):
-            bencoding = encoding.encode('ascii')
-        else:
-            bencoding = encoding
-        if isinstance(unicode_errors, unicode):
-            berrors = unicode_errors.encode('ascii')
-        else:
-            berrors = unicode_errors
-        enc = PyBytes_AsString(bencoding)
-        err = PyBytes_AsString(berrors)
-
-    template_init(&ctx)
-    ctx.user.use_list = use_list
-    ctx.user.object_hook = ctx.user.list_hook = NULL
-    ctx.user.encoding = <const_char_ptr>enc
-    ctx.user.unicode_errors = <const_char_ptr>err
-    if object_hook is not None:
-        if not PyCallable_Check(object_hook):
-            raise TypeError("object_hook must be a callable.")
-        ctx.user.object_hook = <PyObject*>object_hook
-    if list_hook is not None:
-        if not PyCallable_Check(list_hook):
-            raise TypeError("list_hook must be a callable.")
-        ctx.user.list_hook = <PyObject*>list_hook
+    init_ctx(&ctx, object_hook, list_hook, use_list, encoding, unicode_errors)
     ret = template_execute(&ctx, buf, buf_len, &off, 1)
     if ret == 1:
         obj = template_data(&ctx)
@@ -348,7 +347,6 @@ cdef class Unpacker(object):
     def __init__(self, file_like=None, Py_ssize_t read_size=0, bint use_list=0,
                  object object_hook=None, object list_hook=None,
                  encoding=None, unicode_errors='strict', int max_buffer_size=0,
-                 object object_pairs_hook=None,
                  ):
         self.use_list = use_list
         self.file_like = file_like
@@ -370,31 +368,7 @@ cdef class Unpacker(object):
         self.buf_size = read_size
         self.buf_head = 0
         self.buf_tail = 0
-        template_init(&self.ctx)
-        self.ctx.user.use_list = use_list
-        self.ctx.user.object_hook = self.ctx.user.list_hook = <PyObject*>NULL
-        if object_hook is not None:
-            if not PyCallable_Check(object_hook):
-                raise TypeError("object_hook must be a callable.")
-            self.ctx.user.object_hook = <PyObject*>object_hook
-        if list_hook is not None:
-            if not PyCallable_Check(list_hook):
-                raise TypeError("list_hook must be a callable.")
-            self.ctx.user.list_hook = <PyObject*>list_hook
-        if encoding is None:
-            self.ctx.user.encoding = NULL
-            self.ctx.user.unicode_errors = NULL
-        else:
-            if isinstance(encoding, unicode):
-                self._bencoding = encoding.encode('ascii')
-            else:
-                self._bencoding = encoding
-            self.ctx.user.encoding = PyBytes_AsString(self._bencoding)
-            if isinstance(unicode_errors, unicode):
-                self._berrors = unicode_errors.encode('ascii')
-            else:
-                self._berrors = unicode_errors
-            self.ctx.user.unicode_errors = PyBytes_AsString(self._berrors)
+        init_ctx(&self.ctx, object_hook, list_hook, use_list, encoding, unicode_errors)
 
     def feed(self, object next_bytes):
         cdef char* buf