From afb2610676556c004358ee60d391fbd868273a52 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 1 Nov 2024 09:35:15 +0530
Subject: [PATCH] Fix #2086237 [LookupError: unknown encoding
 mac-centraleurope](https://bugs.launchpad.net/calibre/+bug/2086237)

---
 src/calibre/ebooks/chardet.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/chardet.py b/src/calibre/ebooks/chardet.py
index 0caaa05f5e..402d28bd3c 100644
--- a/src/calibre/ebooks/chardet.py
+++ b/src/calibre/ebooks/chardet.py
@@ -100,7 +100,7 @@ def find_declared_encoding(raw, limit=50*1024):
                 return ans
 
 
-_CHARSET_ALIASES = {"macintosh" : "mac-roman", "x-sjis" : "shift-jis"}
+_CHARSET_ALIASES = {"macintosh" : "mac-roman", "x-sjis" : "shift-jis", 'mac-centraleurope': 'cp1250'}
 
 
 def detect(bytestring):
@@ -108,6 +108,7 @@ def detect(bytestring):
         bytestring = bytestring.encode('utf-8', 'replace')
     from calibre_extensions.uchardet import detect as implementation
     enc = implementation(bytestring).lower()
+    enc = _CHARSET_ALIASES.get(enc, enc)
     return {'encoding': enc, 'confidence': 1 if enc else 0}