Github user jbapple-cloudera commented on a diff in the pull request:
https://github.com/apache/thrift/pull/1214#discussion_r106796209
--- Diff: lib/cpp/src/thrift/protocol/TCompactProtocol.tcc ---
@@ -387,7 +389,11 @@ uint32_t
TCompactProtocolT<Transport_>::writeVarint64(uint64_t n) {
*/
template <class Transport_>
uint64_t TCompactProtocolT<Transport_>::i64ToZigzag(const int64_t l) {
- return (l << 1) ^ (l >> 63);
+ const int64_t m = l >> 63;
+ uint64_t p, q;
+ memcpy(&p, &l, sizeof(p));
+ memcpy(&q, &m, sizeof(q));
+ return p = (p << 1) ^ q;
--- End diff --
Good point.
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