From cbadeb5e9a17fde5878b4bb4da26b406fc9e33a6 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 30 Dec 2025 21:55:23 +0530
Subject: [PATCH] Micro-optimization

---
 kitty/colors.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/kitty/colors.c b/kitty/colors.c
index d6384be21..fa542384f 100644
--- a/kitty/colors.c
+++ b/kitty/colors.c
@@ -781,9 +781,13 @@ contrast(Color* self, PyObject *o) {
 
 static int
 hexchar_to_int(char c) {
-    if ('0' <= c && c <= '9') return c - '0';
-    if ('a' <= c && c <= 'f') return c - 'a' + 10;
-    if ('A' <= c && c <= 'F') return c - 'A' + 10;
+    switch (c) {
+        START_ALLOW_CASE_RANGE
+        case '0' ... '9': return c - '0';
+        case 'a' ... 'f': return c - 'a' + 10;
+        case 'A' ... 'F': return c - 'A' + 10;
+        END_ALLOW_CASE_RANGE
+    }
     return -1;
 }