From a6c08edc13805151832be0e66852a6e9e161d910 Mon Sep 17 00:00:00 2001
From: Kamil Dudka <kdudka@redhat.com>
Date: Tue, 27 Aug 2024 10:21:39 +0200
Subject: [PATCH] hash-util: use the `hex_lower` algorithm

... to optimize out the extra traversal step to lower the output string.

Closes: https://github.com/csutils/csdiff/pull/200
---
 src/lib/hash-util.hh | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/lib/hash-util.hh b/src/lib/hash-util.hh
index 40953123..157d774c 100644
--- a/src/lib/hash-util.hh
+++ b/src/lib/hash-util.hh
@@ -21,7 +21,6 @@
 #include <vector>
 
 #include <boost/algorithm/hex.hpp>
-#include <boost/algorithm/string.hpp>
 
 /// compute TEng hash of `src` and return it as hex-encoded string
 template <typename TEng, typename TSrc>
@@ -43,9 +42,6 @@ std::string hexHashStr(const TSrc &src)
 
     // convert the hash to a hex string
     std::string result;
-    boost::algorithm::hex(hash.begin(), hash.end(), back_inserter(result));
-
-    // convert uppercase letters to lowercase
-    boost::algorithm::to_lower(result);
+    boost::algorithm::hex_lower(hash.begin(), hash.end(), back_inserter(result));
     return result;
 }