From 7279d236364739a05657a8a614c15990eb08d0c6 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Thu, 6 May 2021 10:37:07 +0200
Subject: [PATCH] Fix htmlTagLookup

Fix regression introduced with b25acce8. Some users like libxslt may
call the HTML output functions on documents with uppercase tag names,
so we must keep case-insensitive string comparison.

Fixes #248.
---
 HTMLparser.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/HTMLparser.c b/HTMLparser.c
index adefb3b5..b56363a3 100644
--- a/HTMLparser.c
+++ b/HTMLparser.c
@@ -1418,10 +1418,10 @@ htmlInitAutoClose(void) {
 
 static int
 htmlCompareTags(const void *key, const void *member) {
-    const char *tag = (const char *) key;
+    const xmlChar *tag = (const xmlChar *) key;
     const htmlElemDesc *desc = (const htmlElemDesc *) member;
 
-    return(strcmp(tag, desc->name));
+    return(xmlStrcasecmp(tag, BAD_CAST desc->name));
 }
 
 /**