Add a lair sub-command to tweak.

This allows setting the whole map as monster lair, effectively locking items in place so they don't scatter on abandon/reclaim.

plugins/tweak.cpp

@@ -46,6 +46,8 @@ DFhackCExport command_result plugin_init (Core *c, std::vector <PluginCommand> &
         "tweak", "Various tweaks for minor bugs.", tweak, false,
         "  tweak clear-missing\n"
         "    Remove the missing status from the selected unit.\n"
+        "  lair\n"
+        "    Mark the map as monster lair\n"
     ));
     return CR_OK;
 }
@@ -54,7 +56,7 @@ DFhackCExport command_result plugin_shutdown ( Core * c )
 {
     return CR_OK;
 }
-
+command_result lair(DFHack::Core * c, std::vector<std::string> & params);
 static command_result tweak(Core * c, vector <string> &parameters)
 {
     CoreSuspender suspend(c);
@@ -81,8 +83,47 @@ static command_result tweak(Core * c, vector <string> &parameters)
                 crime->flags.bits.discovered = true;
         }
     }
-    else
+    else if(cmd == "lair")
-        return CR_WRONG_USAGE;
+    {
+        return lair(c,parameters);
+    }
+    else return CR_WRONG_USAGE;
 
     return CR_OK;
 }
+
+#include "modules/Maps.h"
+command_result lair(DFHack::Core * c, std::vector<std::string> & params)
+{
+    for(size_t i = 0; i < params.size();i++)
+    {
+        if(params[i] == "help" || params[i] == "?")
+        {
+            c->con.print("Makes the map a smonster lair, hopefully preventing item scatter.\n");
+            return CR_OK;
+        }
+    }
+    Console & con = c->con;
+
+    //CoreSuspender suspend(c);
+    if (!Maps::IsValid())
+    {
+        c->con.printerr("Map is not available!\n");
+        return CR_FAILURE;
+    }
+    uint32_t x_max,y_max,z_max;
+    Maps::getSize(x_max,y_max,z_max);
+    for (size_t i = 0; i < world->map.map_blocks.size(); i++)
+    {
+        df::map_block *block = world->map.map_blocks[i];
+        DFHack::occupancies40d & occupancies = block->occupancy;
+        // for each tile in block
+        for (uint32_t x = 0; x < 16; x++) for (uint32_t y = 0; y < 16; y++)
+        {
+            // set to revealed
+            occupancies[x][y].bits.monster_lair = true;
+        }
+    }
+    con.print("Map monsterized.\n");
+    return CR_OK;
+}