From c447528402f903a5ca3e8eec0ad36b52815b992c Mon Sep 17 00:00:00 2001
From: Jesusaves <cpntb1@ymail.com>
Date: Sat, 15 Dec 2018 18:00:20 -0200
Subject: log2 function, golbarez rewards, main quest restriction, gift count

---
 npc/functions/math.txt | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'npc/functions')

diff --git a/npc/functions/math.txt b/npc/functions/math.txt
index 004125c7b..a7be729a3 100644
--- a/npc/functions/math.txt
+++ b/npc/functions/math.txt
@@ -38,3 +38,31 @@ function	script	lognbaselvl	{
 
     return .@ret;
 }
+
+// log2(<int>)
+//    returns the log base 2 of the passed integer, up to 20 (2**20=1.048.576) (round down always)
+
+function	script	log2	{
+    .@v=abs(getarg(0));
+    .@ok=0;
+    .@i=0;
+
+    freeloop(true);
+    while (!.@ok) {
+        // exact match
+        if (2**.@i == .@v) {
+            .@ok=1;
+        // inexact match, or limit exceeded
+        } if (2**.@i >= .@v || .@i > 20) {
+            .@ok=1;
+            .@i-=1; // round down
+        // not yet
+        } else {
+            .@i+=1;
+        }
+    }
+    freeloop(false);
+
+    return .@i;
+}
+
-- 
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