From 0ea9b42db84560f795e6d017a799b0e536c96cd7 Mon Sep 17 00:00:00 2001
From: Eric House <xwords@eehouse.org>
Date: Mon, 25 Jan 2021 07:58:49 -0800
Subject: [PATCH] clear high-bit when generating gameIDs

postgres DB, at least on ARM, doesn't like it.
---
 xwords4/common/game.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xwords4/common/game.c b/xwords4/common/game.c
index 06b7bc223..14c8e28fb 100644
--- a/xwords4/common/game.c
+++ b/xwords4/common/game.c
@@ -84,6 +84,9 @@ makeGameID( XW_UtilCtxt* util )
     while ( 0 == gameID ) {
         /* High bit never set by XP_RANDOM() alone */
         gameID = (XP_RANDOM() << 16) ^ XP_RANDOM();
+        /* But let's clear it -- set high-bit causes problems for existing
+           postgres DB where INTEGER is apparently a signed 32-bit */
+        gameID &= 0x7FFFFFFF;
     }
     LOG_RETURNF( "%x/%d", gameID, gameID );
     return gameID;