From caa450dcb9a2a9c236f510a85db060de2320b030 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Wed, 20 Nov 2019 20:07:33 +0100
Subject: [PATCH] - debugprintf

---
 source/build/src/sdlayer.cpp   | 17 +++++++++++++++++
 source/common/utility/printf.h |  2 ++
 2 files changed, 19 insertions(+)

diff --git a/source/build/src/sdlayer.cpp b/source/build/src/sdlayer.cpp
index bf68f4d88..eb065a378 100644
--- a/source/build/src/sdlayer.cpp
+++ b/source/build/src/sdlayer.cpp
@@ -2061,3 +2061,20 @@ int32_t handleevents(void)
 }
 
 auto vsnprintfptr = vsnprintf;	// This is an inline in Visual Studio but we need an address for it to satisfy the MinGW compiled libraries.
+
+//
+// debugprintf() -- sends a debug string to the debugger
+//
+void debugprintf(const char* f, ...)
+{
+	va_list va;
+	char buf[1024];
+
+	if (!IsDebuggerPresent()) return;
+
+	va_start(va, f);
+	Bvsnprintf(buf, 1024, f, va);
+	va_end(va);
+
+	OutputDebugStringA(buf);
+}
diff --git a/source/common/utility/printf.h b/source/common/utility/printf.h
index 65c3538ae..a906b0a7c 100644
--- a/source/common/utility/printf.h
+++ b/source/common/utility/printf.h
@@ -69,3 +69,5 @@ inline void buildputs(const char *s)
 {
 	PrintString(PRINT_HIGH, s);
 }
+
+void debugprintf(const char* f, ...);	// Prints to the debugger's log.