From 31cbed5d79e18f8375bcaa56c55d1bd7053b1297 Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Thu, 18 May 2017 12:21:07 +1000
Subject: src/lobject.js: Fix floating point mod operation

Closes #54
---
 src/lobject.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lobject.js b/src/lobject.js
index 680e293..3ec04f6 100644
--- a/src/lobject.js
+++ b/src/lobject.js
@@ -545,7 +545,11 @@ const numarith = function(L, op, v1, v2) {
         case defs.LUA_OPPOW:  return Math.pow(v1, v2);
         case defs.LUA_OPIDIV: return Math.floor(v1 / v2);
         case defs.LUA_OPUNM:  return -v1;
-        case defs.LUA_OPMOD:  return v1 % v2;
+        case defs.LUA_OPMOD:
+            let m = v1 % v2;
+            if ((m*v2) < 0)
+                m += v2;
+            return m;
         default: assert(0);
     }
 };
-- 
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