From 79f867238a9b5c35805f6218aa0e04019eca1db2 Mon Sep 17 00:00:00 2001
From: Sergey Bugaev <bugaevc@gmail.com>
Date: Fri, 9 Aug 2019 23:24:53 +0300
Subject: [PATCH] printf: Support dynamic fill widths

The printf formatting mini-language actually allows you
to pass a '*' character in place of the fill width specification,
in which case it eats one of the passed in arguments and uses it
as width, so implement that.
---
 AK/PrintfImplementation.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/AK/PrintfImplementation.h b/AK/PrintfImplementation.h
index 2899fb04ab8..40f127694a5 100644
--- a/AK/PrintfImplementation.h
+++ b/AK/PrintfImplementation.h
@@ -222,6 +222,11 @@ template<typename PutChFunc>
                 if (*(p + 1))
                     goto one_more;
             }
+            if (*p == '*') {
+              fieldWidth = va_arg(ap, int);
+              if (*(p + 1))
+                goto one_more;
+            }
             if (*p == 'l') {
                 ++long_qualifiers;
                 if (*(p + 1))