From d9967c2638052730c6eeb1624586d633d6482003 Mon Sep 17 00:00:00 2001
From: Taylor R Campbell <campbell+ledger@mumble.net>
Date: Sat, 27 Apr 2024 19:54:23 +0000
Subject: Avoid ctype abuse.

fix https://github.com/ledger/ledger/issues/2338
fix https://github.com/ledger/ledger/issues/2340
---
 src/lookup.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'src/lookup.cc')

diff --git a/src/lookup.cc b/src/lookup.cc
index 228a1d31..56820e99 100644
--- a/src/lookup.cc
+++ b/src/lookup.cc
@@ -188,7 +188,13 @@ lookup_probable_account(const string& ident,
 
 #if 0
 #if !HAVE_BOOST_REGEX_UNICODE
-          if (pos == 0 || (pos > 0 && !std::isalnum(value_key[pos - 1])))
+          // Probably doesn't make sense with value_key as unistring,
+          // but this code is under #if 0 anyway, so if anyone is
+          // tempted to use this by changing value_key to string, let's
+          // avoid leaving a rake to step on.
+          if (pos == 0 ||
+              (pos > 0 &&
+               !std::isalnum(static_cast<unsigned char>(value_key[pos - 1]))))
             addend++;
 #else
           // jww (2010-03-07): Not yet implemented
-- 
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