From 61a5284a07d9a9342d192ae6fb4e8e567a3811a9 Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Thu, 15 Jun 2017 01:38:02 +1000
Subject: src/lstrlib.js: Fix islower+isupper

Old islower considered the null byte to be lower case. The new implementations are simpler too
---
 src/lstrlib.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/lstrlib.js b/src/lstrlib.js
index 70b9e5f..d3373a4 100644
--- a/src/lstrlib.js
+++ b/src/lstrlib.js
@@ -165,8 +165,8 @@ const isalpha = e => ('a'.charCodeAt(0) <= e && e <= 'z'.charCodeAt(0)) || (e >=
 const isdigit = e => '0'.charCodeAt(0) <= e && e <= '9'.charCodeAt(0);
 const iscntrl = e => (0x00 <= e && e <= 0x1f) || e === 0x7f;
 const isgraph = e => e > 32 && e < 127; // TODO: Will only work for ASCII
-const islower = e => /^(?![A-Z]).*$/.test(String.fromCharCode(e));
-const isupper = e => /^(?![a-z]).*$/.test(String.fromCharCode(e));
+const islower = e => /^[a-z]$/.test(String.fromCharCode(e));
+const isupper = e => /^[A-Z]$/.test(String.fromCharCode(e));
 const isalnum = e => /^[a-zA-Z0-9]$/.test(String.fromCharCode(e));
 const ispunct = e => isgraph(e) && !isalnum(e);
 const isspace = e => /^\s$/.test(String.fromCharCode(e));
-- 
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