BLD: add cppsandbox.pyx, close #372

wesm · wesm · commit ba26b4ca94a2 · 2011-11-16T14:18:17.000-05:00
diff --git a/pandas/src/cppsandbox.pyx b/pandas/src/cppsandbox.pyx
@@ -0,0 +1,17 @@
+from libcpp.map cimport map
+from numpy cimport ndarray, int32_t
+
+ctypedef int32_t i4
+
+def map_indices(ndarray[i4] values):
+    cdef:
+        i4 i, n
+        map[i4, i4] mapping
+
+    mapping = map[i4, i4]()
+
+    n = len(values)
+    for i in range(n):
+        mapping[i] = values[i]
+
+
