amxmodx/dlls/ns/natives/memberfuncs.cpp

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2014-08-04 14:35:12 +04:00
// vim: set ts=4 sw=4 tw=99 noet:
//
// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
// Copyright (C) The AMX Mod X Development Team.
//
// This software is licensed under the GNU General Public License, version 3 or higher.
// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
// https://alliedmods.net/amxmodx-license
//
// Natural Selection Module
//
#include <string.h>
#include "../sdk/amxxmodule.h"
#include "../ns.h"
#include "../ns_const.h"
#include "../utilfunctions.h"
#include "../FastDelegate.h"
#include "../GameManager.h"
extern int IsValidBuilding[AVH_USER3_MAX + 1];
using namespace fastdelegate::detail;
void *GameRules=NULL;
mBOOL dlclose_handle_invalid; // Linking errors with metamod
// void AvHBaseBuildable::StartRecycle()
static void (GenericClass::*MFP_Recycle)();
// void AvHWeldable::AddBuildTime(float)
static void (GenericClass::*MFP_WeldFinished)(float);
// AvHGameRules *GetGameRules(void)
static void *(*FP_GetGameRules)();
char *FuncBase;
/**
* sizeof(void (detail::GenericClass::*fptr)())
* is 8 in GCC. Add an empty void * pointer at
* the end to compensate.
* Layout in GCC:
* union {
* void *address; // When this is an address it will always be positive
* int vtable_index; // When it is a vtable index it will always be odd = (vindex*2)+1
* };
* int delta;
* -
* Delta is the adjustment to the this pointer
* For my implementations I will only need it to 0
*/
#ifdef __GNUC__
template <typename OutType>
inline void set_mfp(OutType &out, void *in)
{
union
{
void *in[2];
OutType out;
} mfpu;
mfpu.in[0]=in;
mfpu.in[1]=NULL;
out=mfpu.out;
};
#else
template <typename OutType>
inline void set_mfp(OutType &out, void *in)
{
out=horrible_cast<OutType>(in);
};
#endif
void MFuncs_Initialize(void)
{
char FileName[256];
DLHANDLE DLLBase;
#ifdef __linux__
snprintf(FileName,sizeof(FileName)-1,"%s/dlls/ns_i386.so",MF_GetModname());
#else
snprintf(FileName,sizeof(FileName)-1,"%s\\dlls\\ns.dll",MF_GetModname());
#endif
DLLBase=DLOPEN(FileName);
FuncBase=(char *)DLSYM(DLLBase, MAKE_OFFSET(BASE));
DLCLOSE(DLLBase);
#define MFP(Offs) (((void *)(((char *)FuncBase)+MAKE_OFFSET(Offs))))
set_mfp(MFP_Recycle,MFP(MEMBER_RECYCLE));
set_mfp(MFP_WeldFinished,MFP(MEMBER_TRIGGER_WELDABLE));
// This is not a member function pointer, but use MFP since it
// uses the same address conversion as MFPs do
FP_GetGameRules=horrible_cast<void *(*)()>(MFP(GETGAMERULES));
};
static cell AMX_NATIVE_CALL ns_recycle(AMX *amx, cell *params)
{
CreateNonPlayerEdict(amx,params[1]);
if (Entity->free || Entity->pvPrivateData==NULL)
{
return 0;
}
if (Entity->v.iuser3 <= AVH_USER3_NONE || Entity->v.iuser3 >= AVH_USER3_MAX)
{
return 0;
}
if (IsValidBuilding[Entity->v.iuser3]!=1) // Not a marine structure?
{
return 0;
}
// Make sure it's a marine building, undefined stuff happens on alien structures
(reinterpret_cast<GenericClass *>(Entity->pvPrivateData)->*(MFP_Recycle))();
return 1;
};
static cell AMX_NATIVE_CALL ns_finish_weldable(AMX *amx, cell *params)
{
CreateNonPlayerEdict(amx,params[1]);
if (Entity->free || Entity->pvPrivateData==NULL)
{
return 0;
}
// verify the classname since this will crash if it's the wrong class!
if (strcmp(STRING(Entity->v.classname),"avhweldable")!=0)
{
return 0;
}
// First need to set the weldable to 100% complete
set_private_f(Entity,MAKE_OFFSET(WELD_DONE),get_private_f(Entity,MAKE_OFFSET(WELD_TIME)));
// Now make NS think the weldable has been welded again
// This has to call AvHWeldable::AddBuildTime(float)
// because AvHWeldable::TriggerFinished() does not work properly
(reinterpret_cast<GenericClass *>(Entity->pvPrivateData)->*(MFP_WeldFinished))(100.0);
return 1;
};
static cell AMX_NATIVE_CALL ns_get_teamres(AMX *amx, cell *params)
{
if (GameMan.IsCombat())
{
return 0;
}
if (GameRules==NULL) // GameRules not initialized yet
{
GameRules=(*(FP_GetGameRules))();
}
if (GameRules==NULL) // Still null? Get out of here
{
return 0;
}
switch(params[1])
{
case 1:
{
return amx_ftoc2(*(REAL *)((char *)GameRules+GAMERULES_TEAMA_RESOURCES));
}
case 2:
{
return amx_ftoc2(*(REAL *)((char *)GameRules+GAMERULES_TEAMB_RESOURCES));
}
default:
{
MF_LogError(amx, AMX_ERR_NATIVE, "ns_get_teamres: Expected 1 for team a or 2 for team b, got %d", params[1]);
return 0;
}
}
return 0;
}
static cell AMX_NATIVE_CALL ns_set_teamres(AMX *amx, cell *params)
{
if (GameMan.IsCombat())
{
return 0;
}
if (GameRules==NULL) // GameRules not initialized yet
{
GameRules=(*(FP_GetGameRules))();
}
if (GameRules==NULL) // Still null? Get out of here
{
return 0;
}
switch(params[1])
{
case 1:
{
*(REAL *)((char *)GameRules+GAMERULES_TEAMA_RESOURCES)=amx_ctof2(params[2]);
return 1;
}
case 2:
{
*(REAL *)((char *)GameRules+GAMERULES_TEAMB_RESOURCES)=amx_ctof2(params[2]);
return 1;
}
default:
{
MF_LogError(amx, AMX_ERR_NATIVE, "ns_set_teamres: Expected 1 for team a or 2 for team b, got %d", params[1]);
return 0;
}
}
return 0;
}
static cell AMX_NATIVE_CALL ns_add_teamres(AMX *amx, cell *params)
{
if (GameMan.IsCombat())
{
return 0;
}
if (GameRules==NULL) // GameRules not initialized yet
{
GameRules=(*(FP_GetGameRules))();
}
if (GameRules==NULL) // Still null? Get out of here
{
return 0;
}
switch(params[1])
{
case 1:
{
return amx_ftoc2(*(REAL *)((char *)GameRules+GAMERULES_TEAMA_RESOURCES)+=amx_ctof2(params[2]));
}
case 2:
{
return amx_ftoc2(*(REAL *)((char *)GameRules+GAMERULES_TEAMB_RESOURCES)+=amx_ctof2(params[2]));
}
default:
{
MF_LogError(amx, AMX_ERR_NATIVE, "ns_add_teamres: Expected 1 for team a or 2 for team b, got %d", params[1]);
return 0;
}
}
return 0;
}
#ifdef DEVELOPER_BUILD
static cell AMX_NATIVE_CALL findgameinfo(AMX *amx, cell *params)
{
void *Ret=(*(FP_GetGameRules))();
union
{
void *v;
int i;
}vi;
vi.v=Ret;
printf("GameRules=%d\n",vi.i);
return 1;
};
#endif
AMX_NATIVE_INFO memberfunc_natives[] = {
#ifdef DEVELOPER_BUILD
{ "getgameinfo", findgameinfo },
#endif
{ "ns_recycle", ns_recycle },
{ "ns_finish_weldable", ns_finish_weldable },
{ "ns_get_teamres", ns_get_teamres },
{ "ns_set_teamres", ns_set_teamres },
{ "ns_add_teamres", ns_add_teamres },
{ NULL, NULL }
};
void AddNatives_MemberFunc()
{
MF_AddNatives(memberfunc_natives);
};