added exceptions to API::InitMap

library/DFError.h

@@ -49,6 +49,28 @@ namespace DFHack
                 return "couldn't attach to process";
             }
         };
+
+        class NoMapLoaded : public exception
+        {
+        public:
+            virtual const char* what() const throw()
+            {
+                return "no map has been loaded in the dwarf fortress process";
+            }
+        };
+
+        class BadMapDimensions : public exception
+        {
+        public:
+            BadMapDimensions(uint32_t& _x, uint32_t& _y) : x(_x), y(_y) {}
+            const uint32_t x;
+            const uint32_t y;
+
+            virtual const char* what() const throw()
+            {
+                return "both x and y needs to be between 0 and 48";
+            }
+        };
     }
 }
 

library/DFHackAPI.cpp

@@ -184,12 +184,13 @@ bool API::InitMap()
     d->offset_descriptor->resolveClassnameToVPtr("block_square_event_mineral",d->vein_mineral_vptr);
 
     // get the map pointer
-    uint32_t    x_array_loc = g_pProcess->readDWord (map_offset);
+    uint32_t x_array_loc = g_pProcess->readDWord (map_offset);
     //FIXME: very inadequate
     if (!x_array_loc)
     {
+        throw Error::NoMapLoaded();
         // bad stuffz happend
-        return false;
+        //return false;
     }
     uint32_t mx, my, mz;
 
@@ -201,7 +202,8 @@ bool API::InitMap()
     // test for wrong map dimensions
     if (mx == 0 || mx > 48 || my == 0 || my > 48 || mz == 0)
     {
-        return false;
+        throw Error::BadMapDimensions(mx, my);
+        //return false;
     }
 
     // alloc array for pointers to all blocks