Same user-defined literals, as functions for variable conversion

include/dosbox.h

@@ -231,4 +231,34 @@ static inline constexpr bytecount_t operator "" _tebibytes(const bytecount_t x)
     return x << bytecount_t(40u);
 }
 
+/* and the same, for variables */
+
+static inline constexpr bytecount_t _bytes(const bytecount_t x) {
+    return x;
+}
+
+static inline constexpr bytecount_t _parabytes(const bytecount_t x) { /* AKA bytes per segment increment in real mode */
+    return x << bytecount_t(4u);
+}
+
+static inline constexpr bytecount_t _kibibytes(const bytecount_t x) {
+    return x << bytecount_t(10u);
+}
+
+static inline constexpr bytecount_t _pagebytes(const bytecount_t x) { /* bytes per 4KB page in protected mode */
+    return x << bytecount_t(12u);
+}
+
+static inline constexpr bytecount_t _mibibytes(const bytecount_t x) {
+    return x << bytecount_t(20u);
+}
+
+static inline constexpr bytecount_t _gibibytes(const bytecount_t x) {
+    return x << bytecount_t(30u);
+}
+
+static inline constexpr bytecount_t _tebibytes(const bytecount_t x) {
+    return x << bytecount_t(40u);
+}
+
 #endif /* DOSBOX_DOSBOX_H */