--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/signs.c	Wed Jan 12 11:21:28 2005 +0000
@@ -0,0 +1,233 @@
+#include "stdafx.h"
+#include "ttd.h"
+#include "table/strings.h"
+#include "signs.h"
+#include "saveload.h"
+#include "command.h"
+
+/**
+ *
+ * Update the coordinate of one sign
+ *
+ */
+static void UpdateSignVirtCoords(SignStruct *ss)
+{
+	Point pt = RemapCoords(ss->x, ss->y, ss->z);
+	SetDParam(0, ss->str);
+	UpdateViewportSignPos(&ss->sign, pt.x, pt.y - 6, STR_2806);
+}
+
+/**
+ *
+ * Update all coordinates of a sign
+ *
+ */
+void UpdateAllSignVirtCoords()
+{
+	SignStruct *ss;
+
+	FOR_ALL_SIGNS(ss)
+		if (ss->str != 0)
+			UpdateSignVirtCoords(ss);
+
+}
+
+/**
+ *
+ * Marks the region of a sign as dirty
+ *
+ * @param ss Pointer to the SignStruct
+ */
+static void MarkSignDirty(SignStruct *ss)
+{
+	MarkAllViewportsDirty(
+		ss->sign.left - 6,
+		ss->sign.top  - 3,
+		ss->sign.left + ss->sign.width_1 * 4 + 12,
+		ss->sign.top  + 45);
+}
+
+/**
+ *
+ * Allocates a new sign
+ *
+ * @return The pointer to the new sign, or NULL if there is no more free space
+ */
+static SignStruct *AllocateSign()
+{
+	SignStruct *s;
+	FOR_ALL_SIGNS(s)
+		if (s->str == 0)
+			return s;
+
+	return NULL;
+}
+
+/**
+ *
+ * Place a sign at the giving x/y
+ *
+ * @param p1 not used
+ * @param p2 not used
+ */
+int32 CmdPlaceSign(int x, int y, uint32 flags, uint32 p1, uint32 p2)
+{
+	SignStruct *ss;
+
+	/* Try to locate a new sign */
+	ss = AllocateSign();
+	if (ss == NULL)
+		return_cmd_error(STR_2808_TOO_MANY_SIGNS);
+
+	/* When we execute, really make the sign */
+	if (flags & DC_EXEC) {
+		ss->str = STR_280A_SIGN;
+		ss->x = x;
+		ss->y = y;
+		ss->z = GetSlopeZ(x,y);
+		UpdateSignVirtCoords(ss);
+		MarkSignDirty(ss);
+		_new_sign_struct = ss;
+	}
+
+	return 0;
+}
+
+/**
+ * Rename a sign
+ *
+ * @param sign_id Index of the sign
+ * @param remove  If 1, sign will be removed
+ */
+int32 CmdRenameSign(int x, int y, uint32 flags, uint32 sign_id, uint32 remove)
+{
+	StringID str;
+	SignStruct *ss;
+
+	/* If GetDParam(0) == nothing, we delete the sign */
+	if (GetDParam(0) != 0 && remove != 1) {
+		/* Create the name */
+		str = AllocateName((byte*)_decode_parameters, 0);
+		if (str == 0)
+			return CMD_ERROR;
+
+		if (flags & DC_EXEC) {
+			ss = GetSign(sign_id);
+
+			MarkSignDirty(ss);
+
+			/* Delete the old name */
+			DeleteName(ss->str);
+			/* Assign the new one */
+			ss->str = str;
+
+			/* Update */
+			UpdateSignVirtCoords(ss);
+			MarkSignDirty(ss);
+		} else {
+			/* Free the name, because we did not assign it yet */
+			DeleteName(str);
+		}
+	} else {
+		/* Delete sign */
+		if (flags & DC_EXEC) {
+			ss = GetSign(sign_id);
+
+			/* Delete the name */
+			DeleteName(ss->str);
+			ss->str = 0;
+
+			MarkSignDirty(ss);
+		}
+	}
+
+	return 0;
+}
+
+/**
+ *
+ * Callback function that is called after a sign is placed
+ *
+ */
+void CcPlaceSign(bool success, uint tile, uint32 p1, uint32 p2)
+{
+	if (success) {
+		ShowRenameSignWindow(_new_sign_struct);
+		ResetObjectToPlace();
+	}
+}
+
+/**
+ *
+ * PlaceProc function, called when someone pressed the button if the
+ *  sign-tool is selected
+ *
+ */
+void PlaceProc_Sign(uint tile)
+{
+	DoCommandP(tile, 0, 0, CcPlaceSign, CMD_PLACE_SIGN | CMD_MSG(STR_2809_CAN_T_PLACE_SIGN_HERE));
+}
+
+/**
+ *
+ * Initialize the signs
+ *
+ */
+void InitializeSigns()
+{
+	SignStruct *s;
+	int i;
+
+	memset(_sign_list, 0, sizeof(_sign_list[0]) * _sign_size);
+
+	i = 0;
+	FOR_ALL_SIGNS(s)
+		s->index = i++;
+}
+
+static const byte _sign_desc[] = {
+	SLE_VAR(SignStruct,str,						SLE_UINT16),
+	SLE_CONDVAR(SignStruct,x,					SLE_FILE_I16 | SLE_VAR_I32, 0, 4),
+	SLE_CONDVAR(SignStruct,y,					SLE_FILE_I16 | SLE_VAR_I32, 0, 4),
+	SLE_CONDVAR(SignStruct,x,					SLE_INT32, 5, 255),
+	SLE_CONDVAR(SignStruct,y,					SLE_INT32, 5, 255),
+	SLE_VAR(SignStruct,z,							SLE_UINT8),
+	SLE_END()
+};
+
+/**
+ *
+ * Save all signs
+ *
+ */
+static void Save_SIGN()
+{
+	SignStruct *s;
+
+	FOR_ALL_SIGNS(s) {
+		/* Don't save empty signs */
+		if (s->str != 0) {
+			SlSetArrayIndex(s->index);
+			SlObject(s, _sign_desc);
+		}
+	}
+}
+
+/**
+ *
+ * Load all signs
+ *
+ */
+static void Load_SIGN()
+{
+	int index;
+	while ((index = SlIterateArray()) != -1) {
+		SignStruct *s = GetSign(index);
+
+		SlObject(s, _sign_desc);
+	}
+}
+
+const ChunkHandler _sign_chunk_handlers[] = {
+	{ 'SIGN', Save_SIGN, Load_SIGN, CH_ARRAY | CH_LAST},
+};