X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib-python/blobdiff_plain/5b1830f325c55c70d65fd020f08dd958493e528d..e697f90228e90f5fe5f62b05124d7d43f5fd65dc:/sym.pyx

diff --git a/sym.pyx b/sym.pyx
index e8842e6..f456db8 100644
--- a/sym.pyx
+++ b/sym.pyx
@@ -28,15 +28,20 @@ cdef struct _sym_entry:
   PyObject *v
 
 cdef class SymTable (Mapping):
+  """
+  SymTable([DICT], **KW)
+
+  A mapping keyed by strings.
+  """
   cdef sym_table _t
   cdef int _init(me) except -1:
     sym_create(&me._t)
     return 0
   cdef void *_find(me, object key, unsigned *f) except NULL:
     cdef void *p
-    cdef int n
+    cdef Py_ssize_t n
     cdef _sym_entry *e
-    PyObject_AsReadBuffer(key, &p, &n)
+    PyObject_AsReadBuffer(key, <cvp *>&p, &n)
     if f:
       f[0] = 0
       e = <_sym_entry *>sym_find(&me._t, <char *>p, n, PSIZEOF(e), f)
@@ -71,7 +76,7 @@ cdef class SymTable (Mapping):
 cdef class _SymIter (_MapIterator):
   cdef SymTable t
   cdef sym_iter i
-  def __cinit__(me, SymTable t):
+  def __cinit__(me, SymTable t not None):
     me.t = t
     sym_mkiter(&me.i, &me.t._t)
   cdef void *_next(me):