From d0d8110ecdfdc6092577ee1e73a0555e83643682 Mon Sep 17 00:00:00 2001
From: etabeta78 <etabeta78@users.noreply.github.com>
Date: Thu, 29 Apr 2021 15:34:02 +0200
Subject: [PATCH] options: extended the snapname templates to allow for a
 timestamp %t option, so to allow for alternate ways to organize the generated
 snaps.

---
 src/emu/video.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/emu/video.cpp b/src/emu/video.cpp
index db7406a8474..b6dada1c0b5 100644
--- a/src/emu/video.cpp
+++ b/src/emu/video.cpp
@@ -1169,6 +1169,18 @@ osd_file::error video_manager::open_next(emu_file &file, const char *extension,
 		}
 	}
 
+	// handle %t in the template (for timestamp)
+	std::string snaptime("%t");
+	int pos_time = snapstr.find(snaptime);
+
+	if (pos_time != -1)
+	{
+		char t_str[15];
+		const std::time_t cur_time = std::time(nullptr);
+		strftime(t_str, sizeof(t_str), "%Y%m%d_%H%M%S", std::localtime(&cur_time));
+		strreplace(snapstr, "%t", t_str);
+	}
+
 	// add our own extension
 	snapstr.append(".").append(extension);