1 files changed, 84 insertions, 0 deletions
diff --git a/src/libui_sdl/libui/windows/debug.cpp b/src/libui_sdl/libui/windows/debug.cpp
new file mode 100644
index 0000000..cfafffd
--- /dev/null
+++ b/src/libui_sdl/libui/windows/debug.cpp
@@ -0,0 +1,84 @@
+// 25 february 2015
+#include "uipriv_windows.hpp"
+
+// LONGTERM disable logging and stopping on no-debug builds
+
+static void printDebug(const WCHAR *msg)
+{
+	OutputDebugStringW(msg);
+}
+
+HRESULT _logLastError(debugargs, const WCHAR *s)
+{
+	DWORD le;
+	WCHAR *msg;
+	WCHAR *formatted;
+	BOOL useFormatted;
+
+	le = GetLastError();
+
+	useFormatted = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, le, 0, (LPWSTR) (&formatted), 0, NULL) != 0;
+	if (!useFormatted)
+		formatted = L"\n";
+	msg = strf(L"[libui] %s:%s:%s() %s: GetLastError() == %I32u %s",
+		file, line, func,
+		s, le, formatted);
+	if (useFormatted)
+		LocalFree(formatted);		// ignore error
+	printDebug(msg);
+	uiFree(msg);
+	DebugBreak();
+
+	SetLastError(le);
+	// a function does not have to set a last error
+	// if the last error we get is actually 0, then HRESULT_FROM_WIN32(0) will return S_OK (0 cast to an HRESULT, since 0 <= 0), which we don't want
+	// prevent this by returning E_FAIL
+	if (le == 0)
+		return E_FAIL;
+	return HRESULT_FROM_WIN32(le);
+}
+
+HRESULT _logHRESULT(debugargs, const WCHAR *s, HRESULT hr)
+{
+	WCHAR *msg;
+	WCHAR *formatted;
+	BOOL useFormatted;
+
+	useFormatted = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, hr, 0, (LPWSTR) (&formatted), 0, NULL) != 0;
+	if (!useFormatted)
+		formatted = L"\n";
+	msg = strf(L"[libui] %s:%s:%s() %s: HRESULT == 0x%08I32X %s",
+		file, line, func,
+		s, hr, formatted);
+	if (useFormatted)
+		LocalFree(formatted);		// ignore error
+	printDebug(msg);
+	uiFree(msg);
+	DebugBreak();
+
+	return hr;
+}
+
+void realbug(const char *file, const char *line, const char *func, const char *prefix, const char *format, va_list ap)
+{
+	va_list ap2;
+	char *msg;
+	size_t n;
+	WCHAR *final;
+
+	va_copy(ap2, ap);
+	n = _vscprintf(format, ap2);
+	va_end(ap2);
+	n++;		// terminating '\0'
+
+	msg = (char *) uiAlloc(n * sizeof (char), "char[]");
+	// includes terminating '\0' according to example in https://msdn.microsoft.com/en-us/library/xa1a1a6z.aspx
+	vsprintf_s(msg, n, format, ap);
+
+	final = strf(L"[libui] %hs:%hs:%hs() %hs%hs\n", file, line, func, prefix, msg);
+	uiFree(msg);
+	printDebug(final);
+	uiFree(final);
+
+	DebugBreak();
+}