From 3f3a54c611fd02c2429300c6e8853c6275c41930 Mon Sep 17 00:00:00 2001
From: Dennis Bonke <admin@dennisbonke.com>
Date: Mon, 10 Jun 2024 13:04:23 +0200
Subject: [PATCH] options/ansi: Implement %E in strftime

---
 options/ansi/generic/time-stubs.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/options/ansi/generic/time-stubs.cpp b/options/ansi/generic/time-stubs.cpp
index 798d08c536..1e896cf93a 100644
--- a/options/ansi/generic/time-stubs.cpp
+++ b/options/ansi/generic/time-stubs.cpp
@@ -94,6 +94,7 @@ size_t strftime(char *__restrict dest, size_t max_size,
 	auto c = format;
 	auto p = dest;
 	[[maybe_unused]] bool use_alternative_symbols = false;
+	[[maybe_unused]] bool use_alternative_era_format = false;
 
 	while(*c) {
 		int chunk;
@@ -124,6 +125,21 @@ size_t strftime(char *__restrict dest, size_t max_size,
 				c++;
 				continue;
 			}
+		} else if(*(c + 1) == 'E') {
+			std::array<char, 6> valid{{'c', 'C', 'x', 'X', 'y', 'Y'}};
+			auto next = *(c + 2);
+			if(std::find(valid.begin(), valid.end(), next) != valid.end()) {
+				use_alternative_era_format = true;
+				c++;
+			} else {
+				*p = '%';
+				p++;
+				c++;
+				*p = 'E';
+				p++;
+				c++;
+				continue;
+			}
 		}
 
 		switch(*++c) {