From b94b7965c420661ed621c146a4efaf43bc3cf50b Mon Sep 17 00:00:00 2001
From: "YO4 (Yoshinao Muramatsu)" <ysno@ac.auone-net.jp>
Date: Sat, 20 Feb 2021 00:48:46 +0900
Subject: [PATCH] Fixed fallback ENABLE_VIRTUAL_TERMINAL_PROCESSING value [Bug
 #17639]

---
 ruby.c        | 2 +-
 win32/win32.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/ruby.c b/ruby.c
index 6146ffeaa5..b94937b0da 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1657,7 +1657,7 @@ tty_enabled(void)
     DWORD m;
     if (!GetConsoleMode(h, &m)) return 0;
 # ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
-#   define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x200
+#   define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x4
 # endif
     if (!(m & ENABLE_VIRTUAL_TERMINAL_PROCESSING)) return 0;
     return 1;
diff --git a/win32/win32.c b/win32/win32.c
index b5d982b657..8f99805a5d 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -2693,7 +2693,7 @@ init_stdhandle(void)
         DWORD m;
         if (GetConsoleMode(h, &m)) {
 #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
-#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x200
+#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x4
 #endif
             SetConsoleMode(h, m | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
         }
@@ -7286,7 +7286,7 @@ rb_w32_write_console(uintptr_t strarg, int fd)
 	break;
     }
     reslen = 0;
-    if (dwMode & 4) {	/* ENABLE_VIRTUAL_TERMINAL_PROCESSING */
+    if (dwMode & ENABLE_VIRTUAL_TERMINAL_PROCESSING) {
 	if (!WriteConsoleW(handle, ptr, len, &reslen, NULL))
 	    reslen = (DWORD)-1L;
     }