From: Daniele Varrazzo <daniele.varrazzo@gmail.com>
Date: Sun, 9 May 2021 21:17:59 +0000 (+0200)
Subject: Use faster C mod operator in Decimal dump
X-Git-Tag: 3.0.dev0~48^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=113c446fc573dc59336f8bb7fb70a22f86639530;p=thirdparty%2Fpsycopg.git

Use faster C mod operator in Decimal dump
---

diff --git a/psycopg3_c/psycopg3_c/types/numeric.pyx b/psycopg3_c/psycopg3_c/types/numeric.pyx
index 9cbf94d96..c0d8e7224 100644
--- a/psycopg3_c/psycopg3_c/types/numeric.pyx
+++ b/psycopg3_c/psycopg3_c/types/numeric.pyx
@@ -544,6 +544,7 @@ static const int pydigit_weights[] = {1000, 100, 10, 1};
     const int[4] pydigit_weights
 
 @cython.final
+@cython.cdivision(True)
 cdef class DecimalBinaryDumper(CDumper):
 
     format = PQ_BINARY
@@ -609,6 +610,9 @@ cdef class DecimalBinaryDumper(CDumper):
         # but without changing the digits tuple.
         cdef int wi = 0
         cdef int mod = (ndigits - dscale) % DEC_DIGITS
+        if mod < 0:
+            # the difference between C and Py % operator
+            mod += 4
         if mod:
             wi = DEC_DIGITS - mod
             ndigits += wi