Native window decorations: avoid using C-runtime, which reduces the DLL size from 100kb to 8kb

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/Runtime.cpp

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2021 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
+#include <windows.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+/**
+ * Methods that replace C-runtime methods and allow linking/running without C-runtime.
+ * 
+ * WARNING: Constructors/destructors of static objects are not invoked!
+ *
+ * https://documentation.help/Far-Manager/msdnmag-issues-01-01-hood-default.aspx.html
+ * www.catch22.net/tuts/win32/reducing-executable-size#the-c-runtime-and-default-libraries
+ * https://www.mvps.org/user32/nocrt.html
+ * 
+ * see also LIBCTINY on "Downloads" page here: http://www.wheaty.net/
+ * or https://github.com/leepa/libctiny
+ * 
+ * @author Karl Tauber
+ */
+
+extern "C"
+BOOL WINAPI _DllMainCRTStartup( HINSTANCE instance, DWORD reason, LPVOID reserved ) {
+	return TRUE;
+}
+
+void* __cdecl operator new( size_t cb ) {
+	return ::HeapAlloc( ::GetProcessHeap(), HEAP_ZERO_MEMORY, cb );
+}
+
+void* __cdecl operator new[]( size_t cb ) {
+	return ::HeapAlloc( ::GetProcessHeap(), HEAP_ZERO_MEMORY, cb );
+}
+
+void __cdecl operator delete( void* pv, size_t cb ) {
+	if( pv != NULL )
+		::HeapFree( ::GetProcessHeap(), 0, pv );
+}
+
+/*
+extern "C"
+int __cdecl printf( const char* format, ... ) {
+	char szBuff[1024];
+	int retValue;
+	DWORD cbWritten;
+	va_list argptr;
+
+	va_start( argptr, format );
+	retValue = wvsprintfA( szBuff, format, argptr );
+	va_end( argptr );
+
+	WriteFile( GetStdHandle( STD_OUTPUT_HANDLE ), szBuff, retValue, &cbWritten, NULL );
+
+	return retValue;
+}
+*/