Merge pull request #2521 from myk002/myk_hooks

Prepare for the hook API

CMakeLists.txt

@@ -258,6 +258,7 @@ if(UNIX)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32 -march=i686")
     endif()
     string(REPLACE "-DNDEBUG" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
+    set(CMAKE_INSTALL_RPATH "hack")
 elseif(MSVC)
     # for msvc, tell it to always use 8-byte pointers to member functions to avoid confusion
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /vmg /vmm /MP")

library/CMakeLists.txt

@@ -96,6 +96,7 @@ endif()
 set(MAIN_SOURCES_WINDOWS
     ${CONSOLE_SOURCES}
     Hooks-windows.cpp
+    Hooks.cpp
     PlugLoad-windows.cpp
     Process-windows.cpp
 )
@@ -374,6 +375,8 @@ if(WIN32)
 else()
     set_target_properties(dfhack PROPERTIES COMPILE_FLAGS "-include Export.h" )
     set_target_properties(dfhack-client PROPERTIES COMPILE_FLAGS "-include Export.h" )
+    add_library(dfhooks SHARED Hooks.cpp)
+    target_link_libraries(dfhooks dfhack)
 endif()
 
 # effectively disables debug builds...
@@ -422,6 +425,9 @@ if(UNIX)
         install(PROGRAMS ${dfhack_SOURCE_DIR}/package/linux/dfhack-run
             DESTINATION .)
     endif()
+    install(TARGETS dfhooks
+        LIBRARY DESTINATION .
+        RUNTIME DESTINATION .)
 else()
     # On windows, copy the renamed SDL so DF can still run.
     install(PROGRAMS ${dfhack_SOURCE_DIR}/package/windows/win${DFHACK_BUILD_ARCH}/SDLreal.dll

library/Core.cpp

@@ -1481,11 +1481,14 @@ bool Core::Init()
     // make it obvious what's going on if someone checks the *.txt files.
     #ifndef LINUX_BUILD
         // Don't do this on Linux because it will break PRINT_MODE:TEXT
+        // this is handled as appropriate in Console-posix.cpp
         fprintf(stdout, "dfhack: redirecting stdout to stdout.log (again)\n");
-        fprintf(stderr, "dfhack: redirecting stderr to stderr.log (again)\n");
+        if (!freopen("stdout.log", "w", stdout))
-        freopen("stdout.log", "w", stdout);
+            cerr << "Could not redirect stdout to stdout.log" << endl;
-        freopen("stderr.log", "w", stderr);
     #endif
+    fprintf(stderr, "dfhack: redirecting stderr to stderr.log\n");
+    if (!freopen("stderr.log", "w", stderr))
+        cerr << "Could not redirect stderr to stderr.log" << endl;
 
     Filesystem::init();
 
@@ -1760,6 +1763,14 @@ bool Core::Init()
     }
 
     cerr << "DFHack is running.\n";
+
+    {
+        auto L = Lua::Core::State;
+        Lua::StackUnwinder top(L);
+        Lua::CallLuaModuleFunction(con, L, "script-manager", "reload");
+        onStateChange(con, SC_CORE_INITIALIZED);
+    }
+
     return true;
 }
 /// sets the current hotkey command
@@ -1835,17 +1846,10 @@ bool Core::isSuspended(void)
     return ownerThread.load() == std::this_thread::get_id();
 }
 
-void Core::doUpdate(color_ostream &out, bool first_update)
+void Core::doUpdate(color_ostream &out)
 {
     Lua::Core::Reset(out, "DF code execution");
 
-    if (first_update) {
-        auto L = Lua::Core::State;
-        Lua::StackUnwinder top(L);
-        Lua::CallLuaModuleFunction(out, L, "script-manager", "reload");
-        onStateChange(out, SC_CORE_INITIALIZED);
-    }
-
     // find the current viewscreen
     df::viewscreen *screen = NULL;
     if (df::global::gview)
@@ -1948,19 +1952,15 @@ int Core::Update()
     // Pretend this thread has suspended the core in the usual way,
     // and run various processing hooks.
     {
-        // Initialize the core
-        bool first_update = false;
-
         if(!started)
         {
-            first_update = true;
+            // Initialize the core
             Init();
             if(errorstate)
                 return -1;
-            Lua::Core::Reset(con, "core init");
         }
 
-        doUpdate(out, first_update);
+        doUpdate(out);
     }
 
     // Let all commands run that require CoreSuspender
@@ -2289,6 +2289,14 @@ bool Core::ncurses_wgetch(int in, int & out)
     return true;
 }
 
+bool Core::DFH_ncurses_key(int key)
+{
+    if (getenv("DFHACK_HEADLESS"))
+        return true;
+    int dummy;
+    return !ncurses_wgetch(key, dummy);
+}
+
 int UnicodeAwareSym(const SDL::KeyboardEvent& ke)
 {
     // Assume keyboard layouts don't change the order of numbers:

library/Hooks-darwin.cpp

@@ -279,9 +279,8 @@ DFhackCExport int DFH_SDL_Init(uint32_t flags)
 {
     // reroute stderr
     fprintf(stderr,"dfhack: attempting to hook in\n");
-    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
+    // See: Console-posix.cpp
 
     // find real functions
     fprintf(stderr,"dfhack: saving real SDL functions\n");

library/Hooks-linux.cpp

@@ -117,12 +117,6 @@ DFhackCExport int wgetch(WINDOW *win)
 static int (*_SDL_Init)(uint32_t flags) = 0;
 DFhackCExport int SDL_Init(uint32_t flags)
 {
-    // reroute stderr
-    if (!freopen("stderr.log", "w", stderr))
-        fprintf(stderr, "dfhack: failed to reroute stderr\n");
-    // we don't reroute stdout until  we figure out if this should be done at all
-    // See: Console-linux.cpp
-
     // find real functions
     _SDL_Init = (int (*)( uint32_t )) dlsym(RTLD_NEXT, "SDL_Init");
     _SDL_Quit = (void (*)( void )) dlsym(RTLD_NEXT, "SDL_Quit");

library/Hooks.cpp

@@ -0,0 +1,33 @@
+#include "Core.h"
+#include "Export.h"
+
+// called before main event loop starts
+DFhackCExport void dfhooks_init() {
+    DFHack::Core::getInstance().Init();
+}
+
+// called after main event loops exits
+DFhackCExport void dfhooks_shutdown() {
+    DFHack::Core::getInstance().Shutdown();
+}
+
+// called in the main event loop
+DFhackCExport void dfhooks_update() {
+    DFHack::Core::getInstance().Update();
+}
+
+// called just before adding the macro recording/playback overlay
+DFhackCExport void dfhooks_prerender() {
+    // TODO: render overlay widgets that are not attached to a viewscreen
+}
+
+// called for each SDL event, if true is returned, then the event has been
+// consumed and further processing shouldn't happen
+DFhackCExport bool dfhooks_sdl_event(SDL::Event* event) {
+    return DFHack::Core::getInstance().DFH_SDL_Event(event);
+}
+// called for each utf-8 char read from the ncurses input
+// key is positive for ncurses keys and negative for everything else
+DFhackCExport bool dfhooks_ncurses_key(int key) {
+    return DFHack::Core::getInstance().DFH_ncurses_key(key);
+}

library/include/Core.h

@@ -121,6 +121,12 @@ namespace DFHack
         friend int  ::SDL_Init(uint32_t flags);
         friend int  ::wgetch(WINDOW * w);
 #endif
+        friend void ::dfhooks_init();
+        friend void ::dfhooks_shutdown();
+        friend void ::dfhooks_update();
+        friend void ::dfhooks_prerender();
+        friend bool ::dfhooks_sdl_event(SDL::Event* event);
+        friend bool ::dfhooks_ncurses_key(int key);
     public:
         /// Get the single Core instance or make one.
         static Core& getInstance()
@@ -202,8 +208,9 @@ namespace DFHack
         int Shutdown (void);
         int DFH_SDL_Event(SDL::Event* event);
         bool ncurses_wgetch(int in, int & out);
+        bool DFH_ncurses_key(int key);
 
-        void doUpdate(color_ostream &out, bool first_update);
+        void doUpdate(color_ostream &out);
         void onUpdate(color_ostream &out);
         void onStateChange(color_ostream &out, state_change_event event);
         void handleLoadAndUnloadScripts(color_ostream &out, state_change_event event);

library/include/Hooks.h

@@ -74,3 +74,11 @@ DFhackCExport void * SDL_GetVideoSurface(void);
 
 DFhackCExport int SDL_SemWait(vPtr sem);
 DFhackCExport int SDL_SemPost(vPtr sem);
+
+// new Hooks API
+DFhackCExport void dfhooks_init();
+DFhackCExport void dfhooks_shutdown();
+DFhackCExport void dfhooks_update();
+DFhackCExport void dfhooks_prerender();
+DFhackCExport bool dfhooks_sdl_event(SDL::Event* event);
+DFhackCExport bool dfhooks_ncurses_key(int key);