[util] Add version helper class

Useful to decode, store and compare human-readable driver versions.

src/util/util_version.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <cstdint>
+
+#include "../vulkan/vulkan_loader.h"
+
+#include "util_string.h"
+
+namespace dxvk {
+
+  /**
+   * \brief Decoded driver version
+   */
+  class Version {
+
+  public:
+
+    Version() = default;
+
+    Version(uint32_t major, uint32_t minor, uint32_t patch)
+    : m_raw((uint64_t(major) << 48) | (uint64_t(minor) << 24) | uint64_t(patch)) { }
+
+    uint32_t major() const { return uint32_t(m_raw >> 48); }
+    uint32_t minor() const { return uint32_t(m_raw >> 24) & 0xffffffu; }
+    uint32_t patch() const { return uint32_t(m_raw) & 0xffffffu; }
+
+    bool operator == (const Version& other) const { return m_raw == other.m_raw; }
+    bool operator != (const Version& other) const { return m_raw != other.m_raw; }
+    bool operator >= (const Version& other) const { return m_raw >= other.m_raw; }
+    bool operator <= (const Version& other) const { return m_raw <= other.m_raw; }
+    bool operator >  (const Version& other) const { return m_raw >  other.m_raw; }
+    bool operator <  (const Version& other) const { return m_raw <  other.m_raw; }
+
+    std::string toString() const {
+      return str::format(major(), ".", minor(), ".", patch());
+    }
+
+    explicit operator bool () const {
+      return m_raw != 0;
+    }
+
+  private:
+
+    uint64_t m_raw = 0;
+
+  };
+
+}