From a8387de735ee929fe66a4bdb7e3514004b580618 Mon Sep 17 00:00:00 2001
From: MrZ626 <1046101471@qq.com>
Date: Sat, 6 Feb 2021 23:54:08 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96json=E5=BA=93=E7=9A=84utf8?=
 =?UTF-8?q?=E8=BD=AC=E7=A0=81=E9=80=BB=E8=BE=91?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Zframework/toolfunc.lua | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/Zframework/toolfunc.lua b/Zframework/toolfunc.lua
index 581e8582..b41a25c3 100644
--- a/Zframework/toolfunc.lua
+++ b/Zframework/toolfunc.lua
@@ -332,17 +332,15 @@ do--json
 
 	local function codepoint_to_utf8(n)
 		-- http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=iws-appendixa
-		local f = math.floor
+		local f = bit.rshift
 		if n <= 0x7f then
 			return char(n)
 		elseif n <= 0x7ff then
-			return char(f(n / 64) + 192, n % 64 + 128)
+			return char(f(n, 6) + 192, n % 64 + 128)
 		elseif n <= 0xffff then
-			return char(f(n / 4096) + 224, f(n % 4096 / 64) + 128,
-							n % 64 + 128)
+			return char(f(n, 12) + 224, f(n % 4096, 6) + 128, n % 64 + 128)
 		elseif n <= 0x10ffff then
-			return char(f(n / 262144) + 240, f(n % 262144 / 4096) + 128,
-							f(n % 4096 / 64) + 128, n % 64 + 128)
+			return char(f(n, 18) + 240, f(n % 262144, 12) + 128, f(n % 4096, 6) + 128, n % 64 + 128)
 		end
 		error(string.format("invalid unicode codepoint '%x'", n))
 	end