1 files changed, 87 insertions, 0 deletions
diff --git a/backends/platform/sdl/win32/win32_wrapper.cpp b/backends/platform/sdl/win32/win32_wrapper.cpp
new file mode 100644
index 0000000000..3ff00b6f2d
--- /dev/null
+++ b/backends/platform/sdl/win32/win32_wrapper.cpp
@@ -0,0 +1,87 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+// Disable symbol overrides so that we can use system headers.
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "common/scummsys.h"
+// We need certain functions that are excluded by default
+#undef NONLS
+#include <windows.h>
+#if defined(ARRAYSIZE)
+#undef ARRAYSIZE
+#endif
+
+#include "backends/platform/sdl/win32/win32_wrapper.h"
+
+// VerSetConditionMask and VerifyVersionInfo didn't appear until Windows 2000,
+// so we need to check for them at runtime
+LONGLONG VerSetConditionMaskFunc(ULONGLONG dwlConditionMask, DWORD dwTypeMask, BYTE dwConditionMask) {
+	typedef BOOL(WINAPI *VerSetConditionMaskFunction)(ULONGLONG conditionMask, DWORD typeMask, BYTE conditionOperator);
+
+	VerSetConditionMaskFunction verSetConditionMask = (VerSetConditionMaskFunction)GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), "VerSetConditionMask");
+	if (verSetConditionMask == NULL)
+		return 0;
+
+	return verSetConditionMask(dwlConditionMask, dwTypeMask, dwConditionMask);
+}
+
+BOOL VerifyVersionInfoFunc(LPOSVERSIONINFOEXA lpVersionInformation, DWORD dwTypeMask, DWORDLONG dwlConditionMask) {
+	typedef BOOL(WINAPI *VerifyVersionInfoFunction)(LPOSVERSIONINFOEXA versionInformation, DWORD typeMask, DWORDLONG conditionMask);
+
+	VerifyVersionInfoFunction verifyVersionInfo = (VerifyVersionInfoFunction)GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), "VerifyVersionInfoA");
+	if (verifyVersionInfo == NULL)
+		return FALSE;
+
+	return verifyVersionInfo(lpVersionInformation, dwTypeMask, dwlConditionMask);
+}
+
+namespace Win32 {
+
+bool confirmWindowsVersion(int majorVersion, int minorVersion) {
+	OSVERSIONINFOEX versionInfo;
+	DWORDLONG conditionMask = 0;
+
+	ZeroMemory(&versionInfo, sizeof(OSVERSIONINFOEX));
+	versionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
+	versionInfo.dwMajorVersion = majorVersion;
+	versionInfo.dwMinorVersion = minorVersion;
+
+	conditionMask = VerSetConditionMaskFunc(conditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);
+	conditionMask = VerSetConditionMaskFunc(conditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);
+
+	return VerifyVersionInfoFunc(&versionInfo, VER_MAJORVERSION | VER_MINORVERSION, conditionMask);
+}
+
+LPWSTR ansiToUnicode(const char *s) {
+	DWORD size = MultiByteToWideChar(0, 0, s, -1, NULL, 0);
+
+	if (size > 0) {
+		LPWSTR result = new WCHAR[size];
+		if (MultiByteToWideChar(0, 0, s, -1, result, size) != 0)
+			return result;
+	}
+
+	return NULL;
+}
+
+}