/**
 * vim: set ts=4 :
 * =============================================================================
 * SourceMod (C)2004-2017 AlliedModders LLC.  All rights reserved.
 * =============================================================================
 *
 * This file is part of the SourceMod/SourcePawn SDK.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, version 3.0, as published by the
 * Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, AlliedModders LLC gives you permission to link the
 * code of this program (as well as its derivative works) to "Half-Life 2," the
 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
 * by the Valve Corporation.  You must obey the GNU General Public License in
 * all respects for all other code used.  Additionally, AlliedModders LLC grants
 * this exception to all derivative works.  AlliedModders LLC defines further
 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
 * or <http://www.sourcemod.net/license.php>.
 *
 * Version: $Id$
 */

#if defined _sdktools_included
 #endinput
#endif
#define _sdktools_included

#include <core>
#include <sdktools_engine>
#include <sdktools_functions>
#if !defined SDKTOOLS_DISABLE_SOUNDAPI
#include <sdktools_sound>
#endif
#include <sdktools_stringtables>
#include <sdktools_trace>
#include <sdktools_tempents>
#include <sdktools_tempents_stocks>
#include <sdktools_voice>
#include <sdktools_variant_t>
#include <sdktools_entinput>
#include <sdktools_entoutput>
#include <sdktools_hooks>
#include <sdktools_gamerules>
#include <sdktools_client>

enum SDKCallType
{
	SDKCall_Static,         /**< Static call */
	SDKCall_Entity,         /**< CBaseEntity call */
	SDKCall_Player,         /**< CBasePlayer call */
	SDKCall_GameRules,      /**< CGameRules call */
	SDKCall_EntityList,     /**< CGlobalEntityList call */
	SDKCall_Raw,            /**< |this| pointer with an arbitrary address. This is not available if SM's virtual addresses are enabled */
	SDKCall_Server,         /**< CBaseServer call */
	SDKCall_Engine,         /**< CVEngineServer call */
	SDKCall_VirtualAddress  /**< |this| pointer with an arbitrary SM virtual address */
};

enum SDKLibrary
{
	SDKLibrary_Server,      /**< server.dll/server_i486.so */
	SDKLibrary_Engine       /**< engine.dll/engine_*.so */
};

enum SDKFuncConfSource
{
	SDKConf_Virtual = 0,    /**< Read a virtual index from the Offsets section */
	SDKConf_Signature = 1,  /**< Read a signature from the Signatures section */
	SDKConf_Address = 2     /**< Read an address from the Addresses section */
};

enum SDKType
{
	SDKType_CBaseEntity,    /**< CBaseEntity (always as pointer) */
	SDKType_CBasePlayer,    /**< CBasePlayer (always as pointer) */
	SDKType_Vector,         /**< Vector (pointer, byval, or byref) */
	SDKType_QAngle,         /**< QAngles (pointer, byval, or byref) */
	SDKType_PlainOldData,   /**< Integer/generic data <=32bit (any) */
	SDKType_Float,          /**< Float (any) */
	SDKType_Edict,          /**< edict_t (always as pointer) */
	SDKType_String,         /**< NULL-terminated string (always as pointer) */
	SDKType_Bool,           /**< Boolean (any) */
	SDKType_VirtualAddress, /**< SM Virtual Address */
};

enum SDKPassMethod
{
	SDKPass_Pointer,        /**< Pass as a pointer */
	SDKPass_Plain,          /**< Pass as plain data */
	SDKPass_ByValue,        /**< Pass an object by value */
	SDKPass_ByRef           /**< Pass an object by reference */
};

#define VDECODE_FLAG_ALLOWNULL      (1<<0)    /**< Allow NULL for pointers */
#define VDECODE_FLAG_ALLOWNOTINGAME (1<<1)    /**< Allow players not in game */
#define VDECODE_FLAG_ALLOWWORLD     (1<<2)    /**< Allow World entity */
#define VDECODE_FLAG_BYREF          (1<<3)    /**< Floats/ints by reference */

#define VENCODE_FLAG_COPYBACK       (1<<0)    /**< Copy back data once done */

/**
 * Starts the preparation of an SDK call.
 *
 * @param type          Type of function call this will be.
 */
native void StartPrepSDKCall(SDKCallType type);

/**
 * Sets the virtual index of the SDK call if it is virtual.
 *
 * @param vtblidx       Virtual table index.
 */
native void PrepSDKCall_SetVirtual(int vtblidx);

/**
 * Finds an address in a library and sets it as the address to use for the SDK call.
 *
 * @param lib           Library to use.
 * @param signature     Binary data to search for in the library.  If it starts with '@',
 *                      the bytes parameter is ignored and the signature is interpreted
 *                      as a symbol lookup in the library.
 * @param bytes         Number of bytes in the binary search string.
 * @return              True on success, false if nothing was found.
 */
native bool PrepSDKCall_SetSignature(SDKLibrary lib, const char[] signature, int bytes);

/**
 * Uses the given function address for the SDK call.
 *
 * @param addr          Address of function to use.
 * @return              True on success, false on failure.
 */
native bool PrepSDKCall_SetAddress(Address addr);

/**
 * Finds an address or virtual function index in a GameConfig file and sets it as
 * the calling information for the SDK call.
 *
 * @param gameconf      GameConfig Handle, or INVALID_HANDLE to use sdktools.games.txt.
 * @param source        Whether to look in Offsets or Signatures.
 * @param name          Name of the property to find.
 * @return              True on success, false if nothing was found.
 * @error               Invalid game config Handle.
 */
native bool PrepSDKCall_SetFromConf(Handle gameconf, SDKFuncConfSource source, const char[] name);

/**
 * Sets the return information of an SDK call.  Do not call this if there is no return data.
 * This must be called if there is a return value (i.e. it is not necessarily safe to ignore
 * the data).
 *
 * @param type          Data type to convert to/from.
 * @param pass          How the data is passed in C++.
 * @param decflags      Flags on decoding from the plugin to C++.
 * @param encflags      Flags on encoding from C++ to the plugin.
 */
native void PrepSDKCall_SetReturnInfo(SDKType type, SDKPassMethod pass, int decflags=0, int encflags=0);

/**
 * Adds a parameter to the calling convention.  This should be called in normal ascending order.
 *
 * @param type          Data type to convert to/from.
 * @param pass          How the data is passed in C++.
 * @param decflags      Flags on decoding from the plugin to C++.
 * @param encflags      Flags on encoding from C++ to the plugin.
 * @error               Parameter limit for SDK calls reached.
 */
native void PrepSDKCall_AddParameter(SDKType type, SDKPassMethod pass, int decflags=0, int encflags=0);

/**
 * Finalizes an SDK call preparation and returns the resultant Handle.
 *
 * @return              A new SDKCall Handle on success, or INVALID_HANDLE on failure.
 */
native Handle EndPrepSDKCall();

/**
 * Calls an SDK function with the given parameters.
 *
 * If the call type is Entity or Player, the index MUST ALWAYS be the FIRST parameter passed.
 * If the call type is GameRules, then nothing special needs to be passed.
 * If the return value is a Vector or QAngles, the SECOND parameter must be a Float[3].
 * If the return value is a string, the THIRD parameter must be a String buffer, and the
 *  FOURTH parameter must be the maximum length.
 * All parameters must be passed after the above is followed.  Failure to follow these
 *  rules will result in crashes or wildly unexpected behavior!
 *
 * If the return value is a float or integer, the return value will be this value.
 * If the return value is a string, the value returned by the function will be the number of bytes written, or -1 for NULL.
 * If the return value is a CBaseEntity, CBasePlayer, or edict, the return value will
 *  always be the entity index, or -1 for NULL.
 *
 * @param call          SDKCall Handle.
 * @param ...           Call Parameters.
 * @return              Simple return value, if any.
 * @error               Invalid Handle or internal decoding error.
 */
native any SDKCall(Handle call, any ...);

/**
 * Returns the entity index of the player resource/manager entity.
 *
 * @return              Index of resource entity or -1 if not found.
 */
native int GetPlayerResourceEntity();

#include <sdktools_stocks>

/**
 * Do not edit below this line!
 */
public Extension __ext_sdktools =
{
	name = "SDKTools",
	file = "sdktools.ext",
#if defined AUTOLOAD_EXTENSIONS
	autoload = 1,
#else
	autoload = 0,
#endif
#if defined REQUIRE_EXTENSIONS
	required = 1,
#else
	required = 0,
#endif
};
