1 files changed, 56 insertions, 0 deletions
diff --git a/src/signs_base.h b/src/signs_base.h
new file mode 100644
index 000000000..3fd945b5a
--- /dev/null
+++ b/src/signs_base.h
@@ -0,0 +1,56 @@
+/* $Id$ */
+
+/** @file signs_base.h Base class for signs. */
+
+#ifndef SIGNS_BASE_H
+#define SIGNS_BASE_H
+
+#include "signs_type.h"
+#include "oldpool.h"
+
+DECLARE_OLD_POOL(Sign, Sign, 2, 16000)
+
+struct Sign : PoolItem<Sign, SignID, &_Sign_pool> {
+	char *name;
+	ViewportSign sign;
+	int32        x;
+	int32        y;
+	byte         z;
+	PlayerByte   owner; // placed by this player. Anyone can delete them though. OWNER_NONE for gray signs from old games.
+
+	/**
+	 * Creates a new sign
+	 */
+	Sign(PlayerID owner = INVALID_PLAYER);
+
+	/** Destroy the sign */
+	~Sign();
+
+	inline bool IsValid() const { return this->owner != INVALID_PLAYER; }
+};
+
+static inline SignID GetMaxSignIndex()
+{
+	/* TODO - This isn't the real content of the function, but
+	 *  with the new pool-system this will be replaced with one that
+	 *  _really_ returns the highest index. Now it just returns
+	 *  the next safe value we are sure about everything is below.
+	 */
+	return GetSignPoolSize() - 1;
+}
+
+static inline uint GetNumSigns()
+{
+	extern uint _total_signs;
+	return _total_signs;
+}
+
+static inline bool IsValidSignID(uint index)
+{
+	return index < GetSignPoolSize() && GetSign(index)->IsValid();
+}
+
+#define FOR_ALL_SIGNS_FROM(ss, start) for (ss = GetSign(start); ss != NULL; ss = (ss->index + 1U < GetSignPoolSize()) ? GetSign(ss->index + 1U) : NULL) if (ss->IsValid())
+#define FOR_ALL_SIGNS(ss) FOR_ALL_SIGNS_FROM(ss, 0)
+
+#endif /* SIGNS_BASE_H */