144 lines
3.9 KiB
C++
144 lines
3.9 KiB
C++
/*
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https://github.com/peterix/dfhack
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Copyright (c) 2009-2011 Petr Mrázek (peterix@gmail.com)
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must
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not claim that you wrote the original software. If you use this
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software in a product, an acknowledgment in the product documentation
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would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*/
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#include <stdio.h>
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#include <dlfcn.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/shm.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <vector>
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#include <string>
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#include <map>
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#include "DFHack.h"
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#include "Core.h"
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#include "Hooks.h"
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#include <iostream>
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/*******************************************************************************
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* SDL part starts here *
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*******************************************************************************/
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// hook - called for each game tick (or more often)
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DFhackCExport int SDL_NumJoysticks(void)
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{
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DFHack::Core & c = DFHack::Core::getInstance();
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return c.Update();
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}
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// hook - called at program exit
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static void (*_SDL_Quit)(void) = 0;
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DFhackCExport void SDL_Quit(void)
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{
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DFHack::Core & c = DFHack::Core::getInstance();
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c.Shutdown();
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if(_SDL_Quit)
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{
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_SDL_Quit();
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}
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}
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// called by DF to check input events
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static int (*_SDL_PollEvent)(SDL::Event* event) = 0;
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DFhackCExport int SDL_PollEvent(SDL::Event* event)
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{
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pollevent_again:
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// if SDL returns 0 here, it means there are no more events. return 0
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int orig_return = _SDL_PollEvent(event);
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if(!orig_return)
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return 0;
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// otherwise we have an event to filter
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else if( event != 0 )
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{
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DFHack::Core & c = DFHack::Core::getInstance();
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// if we consume the event, ask SDL for more.
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if(!c.SDL_Event(event))
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goto pollevent_again;
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}
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return orig_return;
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}
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struct WINDOW;
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DFhackCExport int wgetch(WINDOW *win)
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{
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static int (*_wgetch)(WINDOW * win) = (int (*)( WINDOW * )) dlsym(RTLD_NEXT, "wgetch");
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if(!_wgetch)
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{
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exit(EXIT_FAILURE);
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}
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DFHack::Core & c = DFHack::Core::getInstance();
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wgetch_again:
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int in = _wgetch(win);
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int out;
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if(c.ncurses_wgetch(in, out))
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{
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// not consumed, give to DF
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return out;
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}
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else
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{
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// consumed, repeat
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goto wgetch_again;
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}
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}
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// hook - called at program start, initialize some stuffs we'll use later
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static int (*_SDL_Init)(uint32_t flags) = 0;
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DFhackCExport int SDL_Init(uint32_t flags)
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{
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// reroute stderr
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freopen("stderr.log", "w", stderr);
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// we don't reroute stdout until we figure out if this should be done at all
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// See: Console-linux.cpp
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// find real functions
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_SDL_Init = (int (*)( uint32_t )) dlsym(RTLD_NEXT, "SDL_Init");
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_SDL_Quit = (void (*)( void )) dlsym(RTLD_NEXT, "SDL_Quit");
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_SDL_PollEvent = (int (*)(SDL::Event*))dlsym(RTLD_NEXT,"SDL_PollEvent");
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// check if we got them
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if(_SDL_Init && _SDL_Quit && _SDL_PollEvent)
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{
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fprintf(stderr,"dfhack: hooking successful\n");
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}
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else
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{
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// bail, this would be a disaster otherwise
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fprintf(stderr,"dfhack: something went horribly wrong\n");
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exit(1);
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}
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/*
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DFHack::Core & c = DFHack::Core::getInstance();
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c.Init();
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*/
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int ret = _SDL_Init(flags);
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return ret;
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}
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