ui: Get Windows product and build number

ui/xemu-os-utils-windows.c

@@ -19,13 +19,49 @@
 
 #include "xemu-os-utils.h"
 #include <windows.h>
+#include <glib.h>
+#include <glib/gprintf.h>
+#include <wchar.h>
+
+static const char *get_windows_build_info(void)
+{
+    WCHAR current_build[1024], product_name[1024];
+    WCHAR build_size = 1024, product_size = 1024;
+
+    if (RegGetValueW(HKEY_LOCAL_MACHINE,
+                     L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion",
+                     L"ProductName", RRF_RT_REG_SZ, (LPVOID)NULL, &product_name,
+                     (LPDWORD)&product_size) != ERROR_SUCCESS) {
+        return "Windows";
+    }
+
+    if ((RegGetValueW(HKEY_LOCAL_MACHINE,
+                      L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion",
+                      L"DisplayVersion", RRF_RT_REG_SZ, (LPVOID)NULL,
+                      &current_build, (LPDWORD)&build_size) == ERROR_SUCCESS) ||
+        (RegGetValueW(HKEY_LOCAL_MACHINE,
+                      L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion",
+                      L"CSDVersion", RRF_RT_REG_SZ, (LPVOID)NULL,
+                      &current_build, (LPDWORD)&build_size) == ERROR_SUCCESS)) {
+        return g_strdup_printf("%ls %ls", product_name, current_build);
+    }
+
+    return g_strdup_printf("%ls", product_name);
+}
 
 const char *xemu_get_os_info(void)
 {
-	return "Windows";
+    static const char *buffer = NULL;
+
+    if (buffer == NULL) {
+        buffer = get_windows_build_info();
+    }
+
+    return buffer;
 }
 
+
 void xemu_open_web_browser(const char *url)
 {
-	ShellExecute(0, "open", url, 0, 0 , SW_SHOW);
+    ShellExecute(0, "open", url, 0, 0, SW_SHOW);
 }