Add eggy hooks (linux only for now)

CMakeLists.txt

@@ -40,9 +40,11 @@ add_definitions(-DDFHACK_VERSION="${DFHACK_VERSION}")
 IF(UNIX)
     # put the lib into DF/hack
     SET(DFHACK_LIBRARY_DESTINATION hack)
+    SET(DFHACK_EGGY_DESTINATION libs)
 ELSE()
     # windows is crap, therefore we can't do nice things with it. leave the libs on a nasty pile...
     SET(DFHACK_LIBRARY_DESTINATION .)
+    SET(DFHACK_EGGY_DESTINATION .)
 ENDIF()
 # external tools will be installed here:
 SET(DFHACK_BINARY_DESTINATION .)

library/CMakeLists.txt

@@ -103,9 +103,6 @@ modules/World.cpp
 modules/Graphic.cpp
 )
 
-SET(PROJECT_HDRS_LINUX
-)
-
 SET(PROJECT_HDRS_WINDOWS
 include/wdirent.h
 )
@@ -113,18 +110,31 @@ include/wdirent.h
 SET(PROJECT_SRCS_LINUX
 Console-linux.cpp
 Hooks-linux.cpp
+PlugLoad-linux.cpp
 Process-linux.cpp
 )
 
 SET(PROJECT_SRCS_WINDOWS
 Console-windows.cpp
 Hooks-windows.cpp
+PlugLoad-windows.cpp
 Process-windows.cpp
 )
 
+SET(PROJECT_SRCS_LINUX_EGG
+Console-linux.cpp
+Hooks-egg.cpp
+PlugLoad-linux.cpp
+Process-linux.cpp
+)
+
 IF(UNIX)
-    LIST(APPEND PROJECT_HDRS ${PROJECT_HDRS_LINUX})
+    OPTION(BUILD_EGGY "Make DFHack strangely egg-shaped." OFF)
+    IF(BUILD_EGGY)
+        LIST(APPEND PROJECT_SRCS ${PROJECT_SRCS_LINUX_EGG})
+    ELSE()
         LIST(APPEND PROJECT_SRCS ${PROJECT_SRCS_LINUX})
+    ENDIF()
 ELSE()
     LIST(APPEND PROJECT_HDRS ${PROJECT_HDRS_WINDOWS})
     LIST(APPEND PROJECT_SRCS ${PROJECT_SRCS_WINDOWS})
@@ -174,9 +184,13 @@ ENDIF()
 ADD_LIBRARY(dfhack SHARED ${PROJECT_SRCS})
 ADD_DEPENDENCIES(dfhack generate_headers)
 
-IF(WIN32)
+IF(BUILD_EGGY)
+    SET_TARGET_PROPERTIES(dfhack PROPERTIES OUTPUT_NAME "egg" )
+else()
+    IF(WIN32)
         SET_TARGET_PROPERTIES(dfhack PROPERTIES OUTPUT_NAME "SDL" )
-ENDIF()
+    ENDIF()
+endif()
 
 #effectively disables debug builds...
 SET_TARGET_PROPERTIES(dfhack  PROPERTIES DEBUG_POSTFIX "-debug" )
@@ -188,15 +202,23 @@ IF(UNIX)
     install(PROGRAMS ${dfhack_SOURCE_DIR}/package/linux/dfhack
             DESTINATION .)
 ELSE()
+    if(NOT BUILD_EGGY)
         # On windows, copy the renamed SDL so DF can still run.
         install(PROGRAMS ${dfhack_SOURCE_DIR}/package/windows/SDLreal.dll
                 DESTINATION ${DFHACK_LIBRARY_DESTINATION})
+    endif()
 ENDIF()
 
 #install the main lib
-install(TARGETS dfhack
+if(NOT BUILD_EGGY)
+    install(TARGETS dfhack
             LIBRARY DESTINATION ${DFHACK_LIBRARY_DESTINATION}
             RUNTIME DESTINATION ${DFHACK_LIBRARY_DESTINATION})
+else()
+    install(TARGETS dfhack
+            LIBRARY DESTINATION ${DFHACK_EGGY_DESTINATION}
+            RUNTIME DESTINATION ${DFHACK_EGGY_DESTINATION})
+endif()
 #install the offset file
 install(FILES xml/symbols.xml
         DESTINATION ${DFHACK_DATA_DESTINATION}) #linux: share/dfhack
@@ -204,6 +226,7 @@ install(FILES xml/symbols.xml
 install(FILES ../dfhack.init-example
         DESTINATION ${DFHACK_BINARY_DESTINATION})
 
+# Unused for so long that it's not even relevant now...
 if(BUILD_DEVEL)
     if(WIN32)
         install(TARGETS dfhack

library/Core.cpp

@@ -851,6 +851,7 @@ int Core::Shutdown ( void )
     return -1;
 }
 
+// FIXME: this is HORRIBLY broken
 // from ncurses
 #define KEY_F0      0410        /* Function keys.  Space for 64 */
 #define KEY_F(n)    (KEY_F0+(n))    /* Value of function key n */
@@ -887,12 +888,12 @@ bool Core::ncurses_wgetch(int in, int & out)
     return true;
 }
 
-int Core::SDL_Event(SDL::Event* ev, int orig_return)
+int Core::SDL_Event(SDL::Event* ev)
 {
     // do NOT process events before we are ready.
-    if(!started) return orig_return;
+    if(!started) return true;
     if(!ev)
-        return orig_return;
+        return true;
     if(ev && ev->type == SDL::ET_KEYDOWN || ev->type == SDL::ET_KEYUP)
     {
         SDL::KeyboardEvent * ke = (SDL::KeyboardEvent *)ev;
@@ -913,7 +914,7 @@ int Core::SDL_Event(SDL::Event* ev, int orig_return)
             hotkey_states[ke->ksym.sym] = false;
         }
     }
-    return orig_return;
+    return true;
     // do stuff with the events...
 }
 

library/Hooks-egg.cpp

@@ -0,0 +1,91 @@
+/*
+https://github.com/peterix/dfhack
+Copyright (c) 2009-2011 Petr Mrázek (peterix@gmail.com)
+
+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.
+*/
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <vector>
+#include <string>
+#include <map>
+
+#include "Core.h"
+#include "Hooks.h"
+#include <iostream>
+
+// hook - called before rendering
+DFhackCExport int egg_init(void)
+{
+    // reroute stderr
+    freopen("stderr.log", "w", stderr);
+    // we don't reroute stdout until  we figure out if this should be done at all
+    // See: Console-linux.cpp
+    fprintf(stderr,"dfhack: hooking successful\n");
+    return true;
+}
+
+// hook - called before rendering
+DFhackCExport int egg_shutdown(void)
+{
+    DFHack::Core & c = DFHack::Core::getInstance();
+    return c.Shutdown();
+}
+
+// hook - called for each game tick (or more often)
+DFhackCExport int egg_tick(void)
+{
+    DFHack::Core & c = DFHack::Core::getInstance();
+    return c.Update();
+}
+// hook - called before rendering
+DFhackCExport int egg_prerender(void)
+{
+    return true;
+}
+
+// hook - called for each SDL event, returns 0 when the event has been consumed. 1 otherwise
+DFhackCExport int egg_sdl_event(SDL::Event* event)
+{
+    // if the event is valid, intercept
+    if( event != 0 )
+    {
+        DFHack::Core & c = DFHack::Core::getInstance();
+        return c.SDL_Event(event);
+    }
+    return true;
+}
+
+// return this if you want to kill the event.
+const int curses_error = -1;
+// hook - ncurses event, -1 signifies error.
+DFhackCExport int egg_curses_event(int orig_return)
+{
+    /*
+    if(orig_return != -1)
+    {
+        DFHack::Core & c = DFHack::Core::getInstance();
+        int out;
+        return c.ncurses_wgetch(orig_return,);
+    }*/
+    return orig_return;
+}

library/Hooks-linux.cpp

@@ -43,31 +43,6 @@ distribution.
 #include "Hooks.h"
 #include <iostream>
 
-/*
- * Plugin loading functions
- */
-namespace DFHack
-{
-    DFLibrary * OpenPlugin (const char * filename)
-    {
-        dlerror();
-        DFLibrary * ret =  (DFLibrary *) dlopen(filename, RTLD_NOW);
-        if(!ret)
-        {
-            std::cerr << dlerror() << std::endl;
-        }
-        return ret;
-    }
-    void * LookupPlugin (DFLibrary * plugin ,const char * function)
-    {
-        return (DFLibrary *) dlsym((void *)plugin, function);
-    }
-    void ClosePlugin (DFLibrary * plugin)
-    {
-        dlclose((void *) plugin);
-    }
-}
-
 /*******************************************************************************
 *                           SDL part starts here                               *
 *******************************************************************************/

library/Hooks-windows.cpp

@@ -35,24 +35,6 @@ distribution.
 #include "tinythread.h"
 #include "modules/Graphic.h"
 
-/*
- * Plugin loading functions
- */
-namespace DFHack
-{
-    DFLibrary * OpenPlugin (const char * filename)
-    {
-        return (DFLibrary *) LoadLibrary(filename);
-    }
-    void * LookupPlugin (DFLibrary * plugin ,const char * function)
-    {
-        return (void *) GetProcAddress((HMODULE)plugin, function);
-    }
-    void ClosePlugin (DFLibrary * plugin)
-    {
-        FreeLibrary((HMODULE) plugin);
-    }
-}
 /*************************************************************************/
 // extremely boring wrappers beyond this point. Only fix when broken
 

library/PlugLoad-linux.cpp

@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <dlfcn.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/shm.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <vector>
+#include <string>
+#include <map>
+
+#include "DFHack.h"
+#include "Core.h"
+#include "Hooks.h"
+#include <iostream>
+
+/*
+ * Plugin loading functions
+ */
+namespace DFHack
+{
+    DFLibrary * OpenPlugin (const char * filename)
+    {
+        dlerror();
+        DFLibrary * ret =  (DFLibrary *) dlopen(filename, RTLD_NOW);
+        if(!ret)
+        {
+            std::cerr << dlerror() << std::endl;
+        }
+        return ret;
+    }
+    void * LookupPlugin (DFLibrary * plugin ,const char * function)
+    {
+        return (DFLibrary *) dlsym((void *)plugin, function);
+    }
+    void ClosePlugin (DFLibrary * plugin)
+    {
+        dlclose((void *) plugin);
+    }
+}

library/PlugLoad-windows.cpp

@@ -0,0 +1,55 @@
+/*
+https://github.com/peterix/dfhack
+Copyright (c) 2009-2011 Petr Mrázek (peterix@gmail.com)
+
+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.
+*/
+
+#define DFhackCExport extern "C" __declspec(dllexport)
+
+#include <windows.h>
+#include <stdint.h>
+#include <vector>
+#include <string>
+#include "Core.h"
+#include "Hooks.h"
+#include <stdio.h>
+
+#include "tinythread.h"
+#include "modules/Graphic.h"
+
+/*
+ * Plugin loading functions
+ */
+namespace DFHack
+{
+    DFLibrary * OpenPlugin (const char * filename)
+    {
+        return (DFLibrary *) LoadLibrary(filename);
+    }
+    void * LookupPlugin (DFLibrary * plugin ,const char * function)
+    {
+        return (void *) GetProcAddress((HMODULE)plugin, function);
+    }
+    void ClosePlugin (DFLibrary * plugin)
+    {
+        FreeLibrary((HMODULE) plugin);
+    }
+}

library/include/Core.h

@@ -77,6 +77,12 @@ namespace DFHack
         friend int  ::SDL_PollEvent(SDL::Event *);
         friend int  ::SDL_Init(uint32_t flags);
         friend int  ::wgetch(WINDOW * w);
+        friend int  ::egg_init(void);
+        friend int  ::egg_shutdown(void);
+        friend int  ::egg_tick(void);
+        friend int  ::egg_prerender(void);
+        friend int  ::egg_sdl_event(SDL::Event* event);
+        friend int  ::egg_curses_event(int orig_return);
     public:
         /// Get the single Core instance or make one.
         static Core& getInstance()
@@ -127,7 +133,7 @@ namespace DFHack
         bool Init();
         int Update   (void);
         int Shutdown (void);
-        int SDL_Event(SDL::Event* event, int orig_return);
+        int SDL_Event(SDL::Event* event);
         bool ncurses_wgetch(int in, int & out);
         Core(Core const&);              // Don't Implement
         void operator=(Core const&);    // Don't implement

library/include/Hooks.h

@@ -50,3 +50,21 @@ DFhackCExport int SDL_PollEvent(SDL::Event* event);
 DFhackCExport int SDL_Init(uint32_t flags);
 DFhackCExport int wgetch(WINDOW * win);
 
+// hook - called early from DF's main()
+DFhackCExport int egg_init(void);
+
+// hook - called before rendering
+DFhackCExport int egg_shutdown(void);
+
+// hook - called for each game tick (or more often)
+DFhackCExport int egg_tick(void);
+
+// hook - called before rendering
+DFhackCExport int egg_prerender(void);
+
+// hook - called for each SDL event, can filter both the event and the return value
+DFhackCExport int egg_sdl_event(SDL::Event* event);
+
+// hook - ncurses event. return -1 to consume
+DFhackCExport int egg_curses_event(int orig_return);
+

package/linux/egghack

@@ -0,0 +1,7 @@
+#!/bin/sh
+DF_DIR=$(dirname "$0")
+cd "${DF_DIR}"
+export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:"./stonesense/deplibs":"./hack/deplibs"
+export SDL_DISABLE_LOCK_KEYS=1 # Work around for bug in Debian/Ubuntu SDL patch.
+#export SDL_VIDEO_CENTERED=1 # Centre the screen.  Messes up resizing.
+./libs/Dwarf_Fortress $* # Go, go, go! :)