From 2787a7f68896663647e19a1387195ae18db7d37a Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Sat, 9 Aug 2008 18:59:37 +0000
Subject: [PATCH] * luci/libs:	In luci.ip: __array16() does assert() already,
 so drop redundant sanity checks in add() and sub()

---
 libs/core/luasrc/ip.lua | 40 ++++++++++++++++++----------------------
 1 file changed, 18 insertions(+), 22 deletions(-)

diff --git a/libs/core/luasrc/ip.lua b/libs/core/luasrc/ip.lua
index 02b4a66a6..bba701ae2 100644
--- a/libs/core/luasrc/ip.lua
+++ b/libs/core/luasrc/ip.lua
@@ -551,19 +551,17 @@ function cidr.add( self, amount, inplace )
 	local data   = { unpack(self[2]) }
 	local shorts = __array16( amount, self[1] )
 
-	if shorts then
-		for pos = #data, 1, -1 do
-			local add = ( #shorts > 0 ) and table.remove( shorts, #shorts ) or 0
-			if ( data[pos] + add ) > 0xFFFF then
-				data[pos] = ( data[pos] + add ) % 0xFFFF
-				if pos > 1 then
-					data[pos-1] = data[pos-1] + ( add - data[pos] )
-				else
-					return nil
-				end
+	for pos = #data, 1, -1 do
+		local add = ( #shorts > 0 ) and table.remove( shorts, #shorts ) or 0
+		if ( data[pos] + add ) > 0xFFFF then
+			data[pos] = ( data[pos] + add ) % 0xFFFF
+			if pos > 1 then
+				data[pos-1] = data[pos-1] + ( add - data[pos] )
 			else
-				data[pos] = data[pos] + add
+				return nil
 			end
+		else
+			data[pos] = data[pos] + add
 		end
 	end
 
@@ -584,19 +582,17 @@ function cidr.sub( self, amount, inplace )
 	local data   = { unpack(self[2]) }
 	local shorts = __array16( amount, self[1] )
 
-	if shorts then
-		for pos = #data, 1, -1 do
-			local sub = ( #shorts > 0 ) and table.remove( shorts, #shorts ) or 0
-			if ( data[pos] - sub ) < 0 then
-				data[pos] = ( sub - data[pos] ) % 0xFFFF
-				if pos > 1 then
-					data[pos-1] = data[pos-1] - ( sub + data[pos] )
-				else
-					return nil
-				end
+	for pos = #data, 1, -1 do
+		local sub = ( #shorts > 0 ) and table.remove( shorts, #shorts ) or 0
+		if ( data[pos] - sub ) < 0 then
+			data[pos] = ( sub - data[pos] ) % 0xFFFF
+			if pos > 1 then
+				data[pos-1] = data[pos-1] - ( sub + data[pos] )
 			else
-				data[pos] = data[pos] - sub
+				return nil
 			end
+		else
+			data[pos] = data[pos] - sub
 		end
 	end
 
-- 
2.25.1