From cf4d321504ef218f297a0d9ba7a5d42fee04ffc2 Mon Sep 17 00:00:00 2001
From: "James C. Owens" <jamesowens@optonline.net>
Date: Sat, 7 Aug 2021 11:58:41 -0400
Subject: [PATCH] Change isxdigit to HexDigit in bignum.h

---
 src/bignum.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/bignum.h b/src/bignum.h
index 2411e770e3..a9db661a68 100644
--- a/src/bignum.h
+++ b/src/bignum.h
@@ -369,12 +369,11 @@ class CBigNum : public CBigNumBase
             psz++;
 
         // hex string to bignum
-        static const signed char phexdigit[256] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0 };
         *this = 0;
-        while (isxdigit(*psz))
+        while (::HexDigit(*psz) >= 0)
         {
             *this <<= 4;
-            int n = phexdigit[(unsigned char)*psz++];
+            int n = ::HexDigit((unsigned char)*psz++);
             *this += n;
         }
         if (fNegative)