Merge branch 'errorhandling' of git://github.com/mizipzor/dfhack

examples/attachtest.cpp

@@ -9,23 +9,35 @@
 using namespace std;
 #include <DFTypes.h>
 #include <DFHackAPI.h>
+#include <DFError.h>
 
 int main (void)
 {
     time_t start, end;
     double time_diff;
     DFHack::API DF("Memory.xml");
-    if(!DF.Attach())
+    //if(!DF.Attach())
+    //{
+    //    cerr << "DF not found" << endl;
+    //    return 1;
+    //}
+    //if(!DF.Detach())
+    //{
+    //    cerr << "Can't detach from DF" << endl;
+    //    return 1;
+    //}
+    
+    try
     {
-        cerr << "DF not found" << endl;
-        return 1;
+        DF.Attach();
+        DF.Detach();
     }
-    if(!DF.Detach())
+    catch (DFHack::Error::NoProcess& e)
     {
-        cerr << "Can't detach from DF" << endl;
+        cerr << e.what() << endl;
         return 1;
     }
-    
+
     // attach/detach test
     cout << "Testing attach/detach"  << endl;
     time(&start);

library/CMakeLists.txt

@@ -2,6 +2,7 @@
 
 SET(PROJECT_HDRS
 DFCommonInternal.h
+DFError.h
 DFHackAPI.h
 DFMemInfo.h
 DFMemInfoManager.h

library/DFCommonInternal.h

@@ -85,6 +85,7 @@ namespace DFHack
 #include "DFMemInfoManager.h"
 #include "DFVector.h"
 #include "DFMemInfo.h"
+#include "DFError.h"
 #include <stdlib.h>
 
 #include "tinyxml/tinyxml.h"

library/DFError.h

@@ -0,0 +1,114 @@
+/*
+www.sourceforge.net/projects/dfhack
+Copyright (c) 2009 Petr Mrázek (peterix), Kenneth Ferland (Impaler[WrG]), dorf
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any
+damages arising from the use of this software.
+
+Permission is granted to anyone to use this software for any
+purpose, including commercial applications, and to alter it and
+redistribute it freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must
+not claim that you wrote the original software. If you use this
+software in a product, an acknowledgment in the product documentation
+would be appreciated but is not required.
+
+2. Altered source versions must be plainly marked as such, and
+must not be misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source
+distribution.
+*/
+
+#ifndef ERROR_H_INCLUDED
+#define ERROR_H_INCLUDED
+
+#include <string>
+#include <sstream>
+#include <exception>
+
+namespace DFHack
+{
+    namespace Error
+    {
+        class NoProcess : public exception
+        {
+        public:
+            virtual const char* what() const throw()
+            {
+                return "couldn't find a suitable process";
+            }
+        };
+
+        class CantAttach : public exception
+        {
+        public:
+            virtual const char* what() const throw()
+            {
+                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";
+            }
+        };
+
+        // a call to DFHack::mem_info::get* failed
+        class MissingMemoryDefinition : public exception
+        {
+        public:
+            MissingMemoryDefinition(const char* _type, const char* _key) : type(_type), key(_key) {}
+            // Used by functios using integer keys, such as getTrait
+            MissingMemoryDefinition(const char* _type, uint32_t _key) : type(_type)
+            {
+                // FIXME fancy hex printer goes here
+                std::stringstream s;
+                s << _key;
+                key = s.str();
+            }
+
+            // (perhaps it should be an enum, but this is intended for easy printing/logging)
+            // type can be any of the following:
+            //
+            // address
+            // offset
+            // hexvalue
+            // string
+            // profession
+            // job
+            // skill
+            // trait
+            // traitname
+            // labor
+            const std::string type;
+            std::string key;
+
+            virtual const char* what() const throw()
+            {
+                return "memory definition missing";
+            }
+        };
+    }
+}
+
+#endif // ERROR_H_INCLUDED

library/DFHackAPI.cpp

@@ -183,12 +183,13 @@ 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;
 
@@ -200,7 +201,8 @@ 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
@@ -656,19 +658,6 @@ bool API::ReadGeology (vector < vector <uint16_t> >& assign)
     uint32_t regionX, regionY, regionZ;
     uint16_t worldSizeX, worldSizeY;
 
-    // check if we have 'em all
-    if (
-        ! (
-            region_x_offset && region_y_offset && region_z_offset && world_size_x && world_size_y
-            && world_offset && world_regions_offset && world_geoblocks_offset && region_size
-            && region_geo_index_offset && geolayer_geoblock_offset
-        )
-    )
-    {
-        // fail if we don't have them
-        return false;
-    }
-
     // read position of the region inside DF world
     g_pProcess->readDWord (region_x_offset, regionX);
     g_pProcess->readDWord (region_y_offset, regionY);
@@ -737,19 +726,10 @@ bool API::ReadGeology (vector < vector <uint16_t> >& assign)
 bool API::InitReadBuildings ( uint32_t& numbuildings )
 {
     int buildings = d->offset_descriptor->getAddress ("buildings");
-    if(buildings)
-    {
-        d->buildingsInited = true;
-        d->p_bld = new DfVector (d->p->readVector (buildings, 4));
-        numbuildings = d->p_bld->getSize();
-        return true;
-    }
-    else
-    {
-        d->buildingsInited = false;
-        numbuildings = 0;
-        return false;
-    }
+    d->buildingsInited = true;
+    d->p_bld = new DfVector (d->p->readVector (buildings, 4));
+    numbuildings = d->p_bld->getSize();
+    return true;
 }
 
 
@@ -800,19 +780,10 @@ void API::FinishReadBuildings()
 bool API::InitReadConstructions(uint32_t & numconstructions)
 {
     int constructions = d->offset_descriptor->getAddress ("constructions");
-    if(constructions)
-    {
-        d->p_cons = new DfVector (d->p->readVector (constructions, 4));
-        d->constructionsInited = true;
-        numconstructions = d->p_cons->getSize();
-        return true;
-    }
-    else
-    {
-        d->constructionsInited = false;
-        numconstructions = 0;
-        return false;
-    }
+    d->p_cons = new DfVector (d->p->readVector (constructions, 4));
+    d->constructionsInited = true;
+    numconstructions = d->p_cons->getSize();
+    return true;
 }
 
 
@@ -850,20 +821,21 @@ void API::FinishReadConstructions()
 
 bool API::InitReadVegetation(uint32_t & numplants)
 {
-    int vegetation = d->offset_descriptor->getAddress ("vegetation");
-    d->tree_offset = d->offset_descriptor->getOffset ("tree_desc_offset");
-    if(vegetation && d->tree_offset)
+    try 
     {
+        int vegetation = d->offset_descriptor->getAddress ("vegetation");
+        d->tree_offset = d->offset_descriptor->getOffset ("tree_desc_offset");
+
         d->vegetationInited = true;
         d->p_veg = new DfVector (d->p->readVector (vegetation, 4));
         numplants = d->p_veg->getSize();
         return true;
     }
-    else
+    catch (Error::MissingMemoryDefinition&)
     {
         d->vegetationInited = false;
         numplants = 0;
-        return false;
+        throw;
     }
 }
 
@@ -895,95 +867,69 @@ void API::FinishReadVegetation()
 
 bool API::InitReadCreatures( uint32_t &numcreatures )
 {
-    memory_info * minfo = d->offset_descriptor;
-    int creatures = d->offset_descriptor->getAddress ("creatures");
-    d->creature_pos_offset = minfo->getOffset ("creature_position");
-    d->creature_type_offset = minfo->getOffset ("creature_race");
-    d->creature_flags1_offset = minfo->getOffset ("creature_flags1");
-    d->creature_flags2_offset = minfo->getOffset ("creature_flags2");
-    d->creature_first_name_offset = minfo->getOffset ("creature_first_name");
-    d->creature_nick_name_offset = minfo->getOffset ("creature_nick_name");
-    d->creature_last_name_offset = minfo->getOffset ("creature_last_name");
-    d->creature_custom_profession_offset = minfo->getOffset ("creature_custom_profession");
-    d->creature_profession_offset = minfo->getOffset ("creature_profession");
-    d->creature_sex_offset = minfo->getOffset ("creature_sex");
-    d->creature_id_offset = minfo->getOffset ("creature_id");
-    d->creature_squad_name_offset = minfo->getOffset ("creature_squad_name");
-    d->creature_squad_leader_id_offset = minfo->getOffset ("creature_squad_leader_id");
-    d->creature_money_offset = minfo->getOffset ("creature_money");
-    d->creature_current_job_offset = minfo->getOffset ("creature_current_job");
-    d->creature_current_job_id_offset = minfo->getOffset ("current_job_id");
-    d->creature_strength_offset = minfo->getOffset ("creature_strength");
-    d->creature_agility_offset = minfo->getOffset ("creature_agility");
-    d->creature_toughness_offset = minfo->getOffset ("creature_toughness");
-    d->creature_skills_offset = minfo->getOffset ("creature_skills");
-    d->creature_labors_offset = minfo->getOffset ("creature_labors");
-    d->creature_happiness_offset = minfo->getOffset ("creature_happiness");
-    d->creature_traits_offset = minfo->getOffset ("creature_traits");
-    d->creature_likes_offset = minfo->getOffset("creature_likes");
-    if (creatures
-            && d->creature_pos_offset
-            && d->creature_type_offset
-            && d->creature_flags1_offset
-            && d->creature_flags2_offset
-            && d->creature_nick_name_offset
-            && d->creature_custom_profession_offset
-            && d->creature_profession_offset
-            && d->creature_sex_offset
-            && d->creature_id_offset
-            && d->creature_squad_name_offset
-            && d->creature_squad_leader_id_offset
-            && d->creature_money_offset
-            && d->creature_current_job_offset
-            && d->creature_strength_offset
-            && d->creature_agility_offset
-            && d->creature_toughness_offset
-            && d->creature_skills_offset
-            && d->creature_labors_offset
-            && d->creature_happiness_offset
-            && d->creature_traits_offset
-    //       && d->creature_likes_offset
-       )
-    {
+    try
+    {
+        memory_info * minfo = d->offset_descriptor;
+        int creatures = d->offset_descriptor->getAddress ("creatures");
+        d->creature_pos_offset = minfo->getOffset ("creature_position");
+        d->creature_type_offset = minfo->getOffset ("creature_race");
+        d->creature_flags1_offset = minfo->getOffset ("creature_flags1");
+        d->creature_flags2_offset = minfo->getOffset ("creature_flags2");
+        d->creature_first_name_offset = minfo->getOffset ("creature_first_name");
+        d->creature_nick_name_offset = minfo->getOffset ("creature_nick_name");
+        d->creature_last_name_offset = minfo->getOffset ("creature_last_name");
+        d->creature_custom_profession_offset = minfo->getOffset ("creature_custom_profession");
+        d->creature_profession_offset = minfo->getOffset ("creature_profession");
+        d->creature_sex_offset = minfo->getOffset ("creature_sex");
+        d->creature_id_offset = minfo->getOffset ("creature_id");
+        d->creature_squad_name_offset = minfo->getOffset ("creature_squad_name");
+        d->creature_squad_leader_id_offset = minfo->getOffset ("creature_squad_leader_id");
+        d->creature_money_offset = minfo->getOffset ("creature_money");
+        d->creature_current_job_offset = minfo->getOffset ("creature_current_job");
+        d->creature_current_job_id_offset = minfo->getOffset ("current_job_id");
+        d->creature_strength_offset = minfo->getOffset ("creature_strength");
+        d->creature_agility_offset = minfo->getOffset ("creature_agility");
+        d->creature_toughness_offset = minfo->getOffset ("creature_toughness");
+        d->creature_skills_offset = minfo->getOffset ("creature_skills");
+        d->creature_labors_offset = minfo->getOffset ("creature_labors");
+        d->creature_happiness_offset = minfo->getOffset ("creature_happiness");
+        d->creature_traits_offset = minfo->getOffset ("creature_traits");
+        d->creature_likes_offset = minfo->getOffset("creature_likes");
+
         d->p_cre = new DfVector (d->p->readVector (creatures, 4));
         //InitReadNameTables();
         d->creaturesInited = true;
         numcreatures =  d->p_cre->getSize();
         return true;
     }
-    else
+    catch (Error::MissingMemoryDefinition&)
     {
         d->creaturesInited = false;
         numcreatures = 0;
-        return false;
+        throw;
     }
 }
 bool API::InitReadNotes( uint32_t &numnotes )
 {
-    memory_info * minfo = d->offset_descriptor;
-    int notes = minfo->getAddress ("notes");
-    d->note_foreground_offset = minfo->getOffset ("note_foreground");
-    d->note_background_offset = minfo->getOffset ("note_background");
-    d->note_name_offset = minfo->getOffset ("note_name");
-    d->note_xyz_offset = minfo->getOffset ("note_xyz");
-    
-    if (notes
-            && d->note_foreground_offset
-            && d->note_background_offset
-            && d->note_name_offset
-            && d->note_xyz_offset
-       )
+    try
     {
+        memory_info * minfo = d->offset_descriptor;
+        int notes = minfo->getAddress ("notes");
+        d->note_foreground_offset = minfo->getOffset ("note_foreground");
+        d->note_background_offset = minfo->getOffset ("note_background");
+        d->note_name_offset = minfo->getOffset ("note_name");
+        d->note_xyz_offset = minfo->getOffset ("note_xyz");
+
         d->p_notes = new DfVector (d->p->readVector (notes, 4));
         d->notesInited = true;
         numnotes =  d->p_notes->getSize();
         return true;
     }
-    else
+    catch (Error::MissingMemoryDefinition&)
     {
         d->notesInited = false;
         numnotes = 0;
-        return false;
+        throw;
     }
 }
 bool API::ReadNote (const int32_t index, t_note & note)
@@ -1000,30 +946,26 @@ bool API::ReadNote (const int32_t index, t_note & note)
 }
 bool API::InitReadSettlements( uint32_t & numsettlements )
 {
-    memory_info * minfo = d->offset_descriptor;
-    int allSettlements = minfo->getAddress ("settlements");
-    int currentSettlement = minfo->getAddress("settlement_current");
-    d->settlement_name_offset = minfo->getOffset ("settlement_name");
-    d->settlement_world_xy_offset = minfo->getOffset ("settlement_world_xy");
-    d->settlement_local_xy_offset = minfo->getOffset ("settlement_local_xy");
-
-    if (allSettlements && currentSettlement
-            && d->settlement_name_offset
-            && d->settlement_world_xy_offset
-            && d->settlement_local_xy_offset
-       )
+    try
     {
+        memory_info * minfo = d->offset_descriptor;
+        int allSettlements = minfo->getAddress ("settlements");
+        int currentSettlement = minfo->getAddress("settlement_current");
+        d->settlement_name_offset = minfo->getOffset ("settlement_name");
+        d->settlement_world_xy_offset = minfo->getOffset ("settlement_world_xy");
+        d->settlement_local_xy_offset = minfo->getOffset ("settlement_local_xy");
+
         d->p_settlements = new DfVector (d->p->readVector (allSettlements, 4));
         d->p_current_settlement = new DfVector(d->p->readVector(currentSettlement,4));
         d->settlementsInited = true;
         numsettlements =  d->p_settlements->getSize();
         return true;
     }
-    else
+    catch (Error::MissingMemoryDefinition&)
     {
         d->settlementsInited = false;
         numsettlements = 0;
-        return false;
+        throw;
     }
 }
 bool API::ReadSettlement(const int32_t index, t_settlement & settlement)
@@ -1039,6 +981,7 @@ bool API::ReadSettlement(const int32_t index, t_settlement & settlement)
     g_pProcess->read(temp + d->settlement_local_xy_offset, 4 * sizeof(int16_t), (uint8_t *) &settlement.local_x1);
     return true;
 }
+
 bool API::ReadCurrentSettlement(t_settlement & settlement)
 {
     if(!d->settlementsInited) return false;
@@ -1070,21 +1013,21 @@ void API::FinishReadSettlements()
 
 bool API::InitReadHotkeys( )
 {
-    memory_info * minfo = d->offset_descriptor;
-    d->hotkey_start = minfo->getAddress("hotkey_start");
-    d->hotkey_mode_offset = minfo->getOffset ("hotkey_mode");
-    d->hotkey_xyz_offset = minfo->getOffset("hotkey_xyz");
-    d->hotkey_size = minfo->getHexValue("hotkey_size");
-        
-    if (d->hotkey_start && d->hotkey_mode_offset && d->hotkey_size)
+    try
     {
+        memory_info * minfo = d->offset_descriptor;
+        d->hotkey_start = minfo->getAddress("hotkey_start");
+        d->hotkey_mode_offset = minfo->getOffset ("hotkey_mode");
+        d->hotkey_xyz_offset = minfo->getOffset("hotkey_xyz");
+        d->hotkey_size = minfo->getHexValue("hotkey_size");
+
         d->hotkeyInited = true;
         return true;
     }
-    else
+    catch (Error::MissingMemoryDefinition&)
     {
         d->hotkeyInited = false;
-        return false;
+        throw;
     }
 }
 bool API::ReadHotkeys(t_hotkey hotkeys[])
@@ -1157,6 +1100,7 @@ bool API::getItemIndexesInBox(vector<uint32_t> &indexes,
             }
         }
     }
+    return true;
 }
 
 bool API::ReadCreature (const int32_t index, t_creature & furball)
@@ -1241,12 +1185,12 @@ void API::WriteLabors(const uint32_t index, uint8_t labors[NUM_CREATURE_LABORS])
 
 bool API::InitReadNameTables (map< string, vector<string> > & nameTable)
 {
-    int genericAddress = d->offset_descriptor->getAddress ("language_vector");
-    int transAddress = d->offset_descriptor->getAddress ("translation_vector");
-    int word_table_offset = d->offset_descriptor->getOffset ("word_table");
-
-    if(genericAddress && transAddress && word_table_offset)
+    try
     {
+        int genericAddress = d->offset_descriptor->getAddress ("language_vector");
+        int transAddress = d->offset_descriptor->getAddress ("translation_vector");
+        int word_table_offset = d->offset_descriptor->getOffset ("word_table");
+
         DfVector genericVec (d->p->readVector (genericAddress, 4));
         DfVector transVec (d->p->readVector (transAddress, 4));
 
@@ -1272,10 +1216,10 @@ bool API::InitReadNameTables (map< string, vector<string> > & nameTable)
         d->nameTablesInited = true;
         return true;
     }
-    else
+    catch (Error::MissingMemoryDefinition&)
     {
         d->nameTablesInited = false;
-        return false;
+        throw;
     }
 }
 
@@ -1386,14 +1330,16 @@ bool API::Attach()
     // find a process (ProcessManager can find multiple when used properly)
     if (!d->pm->findProcessess())
     {
-        cerr << "couldn't find a suitable process" << endl;
-        return false;
+        throw Error::NoProcess();
+        //cerr << "couldn't find a suitable process" << endl;
+        //return false;
     }
     d->p = (*d->pm) [0];
     if (!d->p->attach())
     {
-        cerr << "couldn't attach to process" << endl;
-        return false; // couldn't attach to process, no go
+        throw Error::CantAttach();
+        //cerr << "couldn't attach to process" << endl;
+        //return false; // couldn't attach to process, no go
     }
     d->offset_descriptor = d->p->getDescriptor();
     // process is attached, everything went just fine... hopefully
@@ -1456,40 +1402,39 @@ void API::WriteRaw (const uint32_t offset, const uint32_t size, uint8_t *source)
 
 bool API::InitViewAndCursor()
 {
-    d->window_x_offset = d->offset_descriptor->getAddress ("window_x");
-    d->window_y_offset = d->offset_descriptor->getAddress ("window_y");
-    d->window_z_offset = d->offset_descriptor->getAddress ("window_z");
-    d->cursor_xyz_offset = d->offset_descriptor->getAddress ("cursor_xyz");
-    d->current_cursor_creature_offset = d->offset_descriptor->getAddress ("current_cursor_creature");
-
-    d->current_menu_state_offset = d->offset_descriptor->getAddress("current_menu_state");
-    d->pause_state_offset = d->offset_descriptor->getAddress ("pause_state");
-    d->view_screen_offset = d->offset_descriptor->getAddress ("view_screen");
-    
-    if (d->window_x_offset && d->window_y_offset && d->window_z_offset && 
-        d->current_cursor_creature_offset && d->current_menu_state_offset && 
-        d->pause_state_offset && d->view_screen_offset)
+    try
     {
+        d->window_x_offset = d->offset_descriptor->getAddress ("window_x");
+        d->window_y_offset = d->offset_descriptor->getAddress ("window_y");
+        d->window_z_offset = d->offset_descriptor->getAddress ("window_z");
+        d->cursor_xyz_offset = d->offset_descriptor->getAddress ("cursor_xyz");
+        d->current_cursor_creature_offset = d->offset_descriptor->getAddress ("current_cursor_creature");
+
+        d->current_menu_state_offset = d->offset_descriptor->getAddress("current_menu_state");
+        d->pause_state_offset = d->offset_descriptor->getAddress ("pause_state");
+        d->view_screen_offset = d->offset_descriptor->getAddress ("view_screen");
+
         d->cursorWindowInited = true;
         return true;
     }
-    else
+    catch (Error::MissingMemoryDefinition&)
     {
-        return false;
+        throw;
     }
 }
 
 bool API::InitViewSize()
 {
-    d->window_dims_offset = d->offset_descriptor->getAddress ("window_dims");
-    if (d->window_dims_offset)
+    try
     {
+        d->window_dims_offset = d->offset_descriptor->getAddress ("window_dims");
+
         d->viewSizeInited = true;
         return true;
     }
-    else
+    catch (Error::MissingMemoryDefinition&)
     {
-        return false;
+        throw;
     }
 }
 
@@ -1567,21 +1512,21 @@ DFWindow * API::getWindow()
 
 bool API::InitReadItems(uint32_t & numitems)
 {
-    int items = d->offset_descriptor->getAddress ("items");
-    d->item_material_offset = d->offset_descriptor->getOffset ("item_materials");
-    
-    if(items && d->item_material_offset)
+    try
     {
+        int items = d->offset_descriptor->getAddress ("items");
+        d->item_material_offset = d->offset_descriptor->getOffset ("item_materials");
+
         d->p_itm = new DfVector (d->p->readVector (items, 4));
         d->itemsInited = true;
         numitems = d->p_itm->getSize();
         return true;
     }
-    else
+    catch (Error::MissingMemoryDefinition&)
     {
         d->itemsInited = false;
         numitems = 0;
-        return false;
+        throw;
     }
 }
 bool API::ReadItem (const uint32_t index, t_item & item)

library/DFMemInfo.cpp

@@ -450,7 +450,7 @@ uint32_t memory_info::getAddress (const char *key)
     {
         return (*iter).second;
     }
-    return 0;
+    throw Error::MissingMemoryDefinition("address", key);
 }
 
 
@@ -462,7 +462,7 @@ uint32_t memory_info::getOffset (const char *key)
     {
         return (*iter).second;
     }
-    return 0;
+    throw Error::MissingMemoryDefinition("offset", key);
 }
 
 // Get named numerical value
@@ -473,7 +473,7 @@ uint32_t memory_info::getHexValue (const char *key)
     {
         return (*iter).second;
     }
-    return 0;
+    throw Error::MissingMemoryDefinition("hexvalue", key);
 }
 
 
@@ -486,7 +486,7 @@ uint32_t memory_info::getAddress (const string &key)
     {
         return (*iter).second;
     }
-    return 0;
+    throw Error::MissingMemoryDefinition("address", key.c_str());
 }
 
 
@@ -498,7 +498,7 @@ uint32_t memory_info::getOffset (const string &key)
     {
         return (*iter).second;
     }
-    return 0;
+    throw Error::MissingMemoryDefinition("offset", key.c_str());
 }
 
 // Get named numerical value
@@ -509,7 +509,7 @@ uint32_t memory_info::getHexValue (const string &key)
     {
         return (*iter).second;
     }
-    return 0;
+    throw Error::MissingMemoryDefinition("hexvalue", key.c_str());
 }
 
 // Get named string
@@ -520,7 +520,7 @@ std::string memory_info::getString (const string &key)
     {
         return (*iter).second;
     }
-    return string("");
+    throw Error::MissingMemoryDefinition("string", key.c_str());
 }
 
 // Get Profession
@@ -530,10 +530,7 @@ string memory_info::getProfession (const uint32_t key) const
     {
         return d->professions[key];
     }
-    else
-    {
-        return string("");
-    }
+    throw Error::MissingMemoryDefinition("profession", key);
 }
 
 // Get Job
@@ -543,7 +540,7 @@ string memory_info::getJob (const uint32_t key) const
     {
         return d->jobs[key];
     }
-    return string("Job Does Not Exist");
+    throw Error::MissingMemoryDefinition("job", key);
 }
 
 string memory_info::getSkill (const uint32_t key) const
@@ -552,7 +549,7 @@ string memory_info::getSkill (const uint32_t key) const
     {
         return d->skills[key];
     }
-    return string("Skill is not Defined");
+    throw Error::MissingMemoryDefinition("skill", key);
 }
 
 // FIXME: ugly hack that needs to die
@@ -585,7 +582,7 @@ string memory_info::getTrait (const uint32_t traitIdx, const uint32_t traitValue
         else
             return d->traits[traitIdx][0];
     }
-    return string("Trait is not Defined");
+    throw Error::MissingMemoryDefinition("trait", traitIdx);
 }
 
 string memory_info::getTraitName(const uint32_t traitIdx) const
@@ -594,7 +591,7 @@ string memory_info::getTraitName(const uint32_t traitIdx) const
     {
         return d->traits[traitIdx][d->traits[traitIdx].size()-1];
     }
-    return string("Trait is not Defined");
+    throw Error::MissingMemoryDefinition("traitname", traitIdx);
 }
 
 string memory_info::getLabor (const uint32_t laborIdx)
@@ -603,7 +600,7 @@ string memory_info::getLabor (const uint32_t laborIdx)
     {
         return d->labors[laborIdx];
     }
-    return string("");
+    throw Error::MissingMemoryDefinition("labor", laborIdx);
 }
 
 // Reset everything