From ca6bc4d9aa7df2c3fd4f102a5a999558b73a938e Mon Sep 17 00:00:00 2001
From: Guillaume Horel <guillaume.horel@gmail.com>
Date: Tue, 6 Jun 2017 15:24:26 -0400
Subject: farm is the new city

---
 pyisda/curve.pxd | 4 ++--
 pyisda/curve.pyx | 6 +++---
 setup.py         | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/pyisda/curve.pxd b/pyisda/curve.pxd
index 632d2e1..2419d1d 100644
--- a/pyisda/curve.pxd
+++ b/pyisda/curve.pxd
@@ -38,8 +38,8 @@ cdef extern from "isda/bastypes.h":
         TDate fDate
         double fRate
 
-cdef extern from "city.h" nogil:
-    uint64_t c_CityHash64 "CityHash64" (char *buff, size_t len)
+cdef extern from "farmhash.h" namespace 'util' nogil:
+    uint64_t Hash64(const char *buff, size_t len)
 
 cdef inline size_t TCurve_size(int num_items) nogil:
     return sizeof(int) + sizeof(TDate) + sizeof(double) + \
diff --git a/pyisda/curve.pyx b/pyisda/curve.pyx
index 082d5e0..60858b8 100644
--- a/pyisda/curve.pyx
+++ b/pyisda/curve.pyx
@@ -63,7 +63,7 @@ cdef class Curve(object):
             size_t curve_size = TCurve_size(curve.fNumItems)
             unsigned char* buf = <unsigned char*>malloc(curve_size * sizeof(unsigned char))
         serialize(curve, buf)
-        cdef uint64_t r = c_CityHash64(<char*>buf, curve_size)
+        cdef uint64_t r = Hash64(<char*>buf, curve_size)
         free(buf)
         return r
 
@@ -328,7 +328,7 @@ cdef class YieldCurve(Curve):
         memcpy(cursor, &size, sizeof(size_t))
         cursor += sizeof(size_t)
         memcpy(cursor, self.dates.data(), sizeof(TDate) * size)
-        cdef uint64_t r = c_CityHash64(<char*>buf, buf_size)
+        cdef uint64_t r = Hash64(<char*>buf, buf_size)
         free(buf)
         return r
 
@@ -545,7 +545,7 @@ cdef class SpreadCurve(Curve):
         memcpy(cursor, &size, sizeof(size_t))
         cursor += sizeof(size_t)
         self.ticker.copy(<char*>cursor, size, 0)
-        cdef uint64_t r = c_CityHash64(<char*>buf, buf_size)
+        cdef uint64_t r = Hash64(<char*>buf, buf_size)
         free(buf)
         return r
 
diff --git a/setup.py b/setup.py
index b7cd880..2254fe0 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@ import numpy
 
 all_extensions = Extension("*", ["pyisda/*.pyx"],
                            include_dirs = ['c_layer', numpy.get_include()],
-                           libraries = ["cds", "cityhash"],
+                           libraries = ["cds", "farmhash"],
                            language = 'c++')
 
 c_extension = Extension("pyisda.flat_hazard",
-- 
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