extend versionhelpers

src/versionhelpers.c

@@ -0,0 +1,72 @@
+#include <windows.h>
+#include "versionhelpers.h"
+
+typedef NTSTATUS(WINAPI* RTLVERIFYVERSIONINFOPROC)(PRTL_OSVERSIONINFOEXW, ULONG, ULONGLONG);
+typedef const char* (CDECL* WINE_GET_VERSIONPROC)();
+typedef void (CDECL* WINE_GET_HOST_VERSIONPROC)(const char** sysname, const char** release);
+
+static RTLVERIFYVERSIONINFOPROC RtlVerifyVersionInfo;
+static WINE_GET_VERSIONPROC wine_get_version;
+static WINE_GET_HOST_VERSIONPROC wine_get_host_version;
+
+/* GetProcAddress is rather slow so we use a function to inizialize it once on startup */
+void verhelp_init()
+{
+    HMODULE mod = GetModuleHandleA("ntdll.dll");
+    if (mod)
+    {
+        RtlVerifyVersionInfo = (RTLVERIFYVERSIONINFOPROC)GetProcAddress(mod, "RtlVerifyVersionInfo");
+        wine_get_version = (WINE_GET_VERSIONPROC)GetProcAddress(mod, "wine_get_version");
+        wine_get_host_version = (WINE_GET_HOST_VERSIONPROC)GetProcAddress(mod, "wine_get_host_version");
+    }
+}
+
+BOOL verhelp_verify_version(PRTL_OSVERSIONINFOEXW versionInfo, ULONG typeMask, ULONGLONG conditionMask)
+{
+    return RtlVerifyVersionInfo ?
+        RtlVerifyVersionInfo(versionInfo, typeMask, conditionMask) == 0 :
+        VerifyVersionInfoW(versionInfo, typeMask, conditionMask);
+}
+
+const char* verhelp_wine_get_version()
+{
+    return wine_get_version ? wine_get_version() : NULL;
+}
+
+void verhelp_wine_get_host_version(const char** sysname, const char** release)
+{
+    if (wine_get_host_version)
+    {
+        wine_get_host_version(sysname, release);
+        return;
+    }
+
+    if (sysname)
+        *sysname = NULL;
+
+    if (release)
+        *release = NULL;
+}
+
+BOOL verhelp_is_wine()
+{
+    return wine_get_version != NULL;
+}
+
+BOOL verhelp_is_macos()
+{
+    const char* sysname = NULL;
+    const char* release = NULL;
+    verhelp_wine_get_host_version(&sysname, &release);
+
+    return sysname && _strcmpi(sysname, "Darwin") == 0;
+}
+
+BOOL verhelp_is_linux()
+{
+    const char* sysname = NULL;
+    const char* release = NULL;
+    verhelp_wine_get_host_version(&sysname, &release);
+
+    return sysname && _strcmpi(sysname, "Linux") == 0;
+}