[Tutorial] Plugin development guide

[zgintasz]

What the hell... I'm just trying to use invoke and here is my results . Please, help someone.

#include "SDK\amx\amx.h"
#include "SDK\plugincommon.h"

#include "Invoke.h"

typedef void (*logprintf_t)(char* format, ...);


logprintf_t logprintf;
extern void *pAMXFunctions;


cell AMX_NATIVE_CALL HelloWorld(AMX* amx, cell* params)
{
    logprintf("This was printed from the Test plugin! Yay!");
    return 1;
}

PLUGIN_EXPORT unsigned int PLUGIN_CALL Supports() 
{
    return SUPPORTS_VERSION | SUPPORTS_AMX_NATIVES;
}

PLUGIN_EXPORT bool PLUGIN_CALL Load(void **ppData) 
{
	invoke = new Invoke;
    pAMXFunctions = ppData[PLUGIN_DATA_AMX_EXPORTS];
    logprintf = (logprintf_t) ppData[PLUGIN_DATA_LOGPRINTF];

    logprintf(" * Test plugin was loaded.");

    return true;
}

PLUGIN_EXPORT void PLUGIN_CALL Unload()
{
    logprintf(" * Test plugin was unloaded.");
}

AMX_NATIVE_INFO PluginNatives[] =
{
    {"HelloWorld", HelloWorld},
    {0, 0}
};

PLUGIN_EXPORT int PLUGIN_CALL AmxLoad( AMX *amx ) 
{
	invoke->amx_list.push_back(amx);
    return amx_Register(amx, PluginNatives, -1);
}


PLUGIN_EXPORT int PLUGIN_CALL AmxUnload( AMX *amx ) 
{
	for (std::list<AMX *>::iterator i = invoke->amx_list.begin(); i != invoke->amx_list.end(); ++i)
	{
	    if (* i == amx)
		{
			invoke->amx_list.erase(i);
			break;
		}
	}
    return AMX_ERR_NONE;
}

[Y_Less]

Have you tried compiling? Those look like IntelliSense errors, which are not always accurate.

[Cassandra]

Originally Posted by zgintasz

What the hell... I'm just trying to use invoke and here is my results . Please, help someone.

#include "SDK\amx\amx.h"
#include "SDK\plugincommon.h"

#include "Invoke.h"

typedef void (*logprintf_t)(char* format, ...);


logprintf_t logprintf;
extern void *pAMXFunctions;


cell AMX_NATIVE_CALL HelloWorld(AMX* amx, cell* params)
{
    logprintf("This was printed from the Test plugin! Yay!");
    return 1;
}

PLUGIN_EXPORT unsigned int PLUGIN_CALL Supports() 
{
    return SUPPORTS_VERSION | SUPPORTS_AMX_NATIVES;
}

PLUGIN_EXPORT bool PLUGIN_CALL Load(void **ppData) 
{
	invoke = new Invoke;
    pAMXFunctions = ppData[PLUGIN_DATA_AMX_EXPORTS];
    logprintf = (logprintf_t) ppData[PLUGIN_DATA_LOGPRINTF];

    logprintf(" * Test plugin was loaded.");

    return true;
}

PLUGIN_EXPORT void PLUGIN_CALL Unload()
{
    logprintf(" * Test plugin was unloaded.");
}

AMX_NATIVE_INFO PluginNatives[] =
{
    {"HelloWorld", HelloWorld},
    {0, 0}
};

PLUGIN_EXPORT int PLUGIN_CALL AmxLoad( AMX *amx ) 
{
	invoke->amx_list.push_back(amx);
    return amx_Register(amx, PluginNatives, -1);
}


PLUGIN_EXPORT int PLUGIN_CALL AmxUnload( AMX *amx ) 
{
	for (std::list<AMX *>::iterator i = invoke->amx_list.begin(); i != invoke->amx_list.end(); ++i)
	{
	    if (* i == amx)
		{
			invoke->amx_list.erase(i);
			break;
		}
	}
    return AMX_ERR_NONE;
}

It looks like you are using VS 2010. Can you try compiling manually using GCC++ from Command Prompt?

[zgintasz]

Originally Posted by Y_Less

Have you tried compiling? Those look like IntelliSense errors, which are not always accurate.

Yes, I tried and I get these errors :

1>------ Build started: Project: C++_iScreenFader, Configuration: Debug Win32 ------
1>  main.cpp
1>f:\program files\microsoft visual studio 10.0\vc\include\malloc.h(251): warning C4005: 'alloca' : macro redefinition
1>          c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\sdk\amx\amx.h(87) : see previous definition of 'alloca'
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(26): error C2065: 'invoke' : undeclared identifier
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(48): error C2065: 'invoke' : undeclared identifier
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(48): error C2227: left of '->amx_list' must point to class/struct/union/generic type
1>          type is ''unknown-type''
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(48): error C2228: left of '.push_back' must have class/struct/union
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(55): error C2065: 'invoke' : undeclared identifier
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(55): error C2227: left of '->amx_list' must point to class/struct/union/generic type
1>          type is ''unknown-type''
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(55): error C2228: left of '.begin' must have class/struct/union
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(55): error C2065: 'invoke' : undeclared identifier
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(55): error C2227: left of '->amx_list' must point to class/struct/union/generic type
1>          type is ''unknown-type''
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(55): error C2228: left of '.end' must have class/struct/union
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(59): error C2065: 'invoke' : undeclared identifier
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(59): error C2227: left of '->amx_list' must point to class/struct/union/generic type
1>          type is ''unknown-type''
1>c:\users\gintautas\documents\visual studio 2010\projects\c++_iscreenfader\c++_iscreenfader\main.cpp(59): error C2228: left of '.erase' must have class/struct/union
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Originally Posted by Cassandra

It looks like you are using VS 2010. Can you try compiling manually using GCC++ from Command Prompt?

I'm using VC++ 2010 Express... Can you give me a link to tutorial(or something), because I didn't used GCC++ and I don't know how to do that .

[Rancho]

Hello, I'm trying to make something..
C++:

int playerid = params[1];
	int idx;
	if(!amx_FindPublic(amx,"__GetPlayerName",&idx)){
		cell ret;
		cell* str_phys;
		cell amxaddr;
		amx_Push(amx,playerid);
		amx_Allot(amx,24,&amxaddr,&str_phys);
		
		amx_Push(amx,amxaddr);
		amx_Exec(amx,&ret,idx);

		char name[24];
		amx_GetString(name,str_phys,0,24);
		amx_Release(amx,amxaddr);
		printf("%s",name);
	}else{
		printf("Native");
	}

Pawn:

forward __GetPlayerName(playerid,name[]);
public __GetPlayerName(playerid,name[]){
	GetPlayerName(playerid,name,MAX_PLAYER_NAME);
}

It doesn't crash but prints player name: "" (empty)

P.S: I don't want to use invoke or gdk.I want to make this.
P.S: playerid is correct.I tested.

[Rancho]

Originally Posted by Rancho

Hello, I'm trying to make something..
C++:

int playerid = params[1];
	int idx;
	if(!amx_FindPublic(amx,"__GetPlayerName",&idx)){
		cell ret;
		cell* str_phys;
		cell amxaddr;
		amx_Push(amx,playerid);
		amx_Allot(amx,24,&amxaddr,&str_phys);
		
		amx_Push(amx,amxaddr);
		amx_Exec(amx,&ret,idx);

		char name[24];
		amx_GetString(name,str_phys,0,24);
		amx_Release(amx,amxaddr);
		printf("%s",name);
	}else{
		printf("Native");
	}

Pawn:

forward __GetPlayerName(playerid,name[]);
public __GetPlayerName(playerid,name[]){
	GetPlayerName(playerid,name,MAX_PLAYER_NAME);
}

It doesn't crash but prints player name: "" (empty)

P.S: I don't want to use invoke or gdk.I want to make this.
P.S: playerid is correct.I tested.

Up+++

[zgintasz]

What I'm doing wrong? plugin_test prints wrong values.

forward plugin_test( itg_MinX, itg_MinY, itg_MaxX, itg_MaxY );
public plugin_test( itg_MinX, itg_MinY, itg_MaxX, itg_MaxY )
{
    printf( "comes from c++: %d, %d, %d, %d", itg_MinX, itg_MinY, itg_MaxX, itg_MaxY );
}

// calling:
testfunc( amx, 5, 3, 2, 8 );

// function:

void testfunc( AMX* amx, int itg_MinX, int itg_MinY, int itg_MaxX, int itg_MaxY )
{
    int idx;

    const cell arr[] = { itg_MinX, itg_MinY, itg_MaxX, itg_MaxY };

    if(!amx_FindPublic(amx, "plugin_test", &idx))
    {
        cell
            ret, 
            addr = 0;

        cell
            amx_addr, 
            *phys_addr;

	amx_Allot(amx, sizeof(arr) / sizeof(cell), &amx_addr, &phys_addr);
        memcpy(phys_addr, arr, sizeof(arr));
        amx_Push(amx, amx_addr);
        amx_Exec(amx, &ret, idx);
        amx_Release(amx, addr);
    }
}

[JoBullet]

@Rancho
use amx_PushString, you can get working examples in some of plugins(just look up some with callbacks that receive strings)
@zgintasz
You must amx_Push all values in reverse order(right-to-left), push theirs' amx addr of course.

[zgintasz]

Originally Posted by JoBullet

@Rancho
use amx_PushString, you can get working examples in some of plugins(just look up some with callbacks that receive strings)
@zgintasz
You must amx_Push all values in reverse order(right-to-left), push theirs' amx addr of course.

Can you give me a fixed code? I'm just trying to learn it.

[JoBullet]

Originally Posted by zgintasz

Can you give me a fixed code? I'm just trying to learn it.

There are plenty of plugins which shows exactly that and by the way, do not be lazy