From 5a35ee08d3d99868c165574e1db33d50302a8b3f Mon Sep 17 00:00:00 2001
From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Wed, 2 Oct 2024 12:58:01 -0700
Subject: [PATCH] AK: Address MSVC/Windows portability for logging

`STDERR_FILENO` is pretty common but not part of the standard. On
Windows, in order to get a file number, one must use `_fileno` to
convert the `FILE *` to a file number. Adopt this pattern similar
to the Android path which uses platform specific operations.
---
 AK/Format.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/AK/Format.cpp b/AK/Format.cpp
index 04efdb3b79c..7aa01f8029f 100644
--- a/AK/Format.cpp
+++ b/AK/Format.cpp
@@ -25,6 +25,10 @@
 #    include <android/log.h>
 #endif
 
+#if defined(AK_OS_WINDOWS)
+#    include <io.h>
+#endif
+
 namespace AK {
 
 class FormatParser : public GenericLexer {
@@ -1213,6 +1217,8 @@ void vdbg(StringView fmtstr, TypeErasedFormatParams& params, bool newline)
 
 #ifdef AK_OS_ANDROID
     __android_log_write(ANDROID_LOG_DEBUG, s_log_tag_name, string.characters_without_null_termination());
+#elif defined(AK_OS_WINDOWS)
+    [[maybe_unused]] auto rc = _write(_fileno(stderr), string.characters_without_null_termination(), string.length());
 #else
     [[maybe_unused]] auto rc = write(STDERR_FILENO, string.characters_without_null_termination(), string.length());
 #endif