amxmodx/plugins/include/hamsandwich.inc

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// 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
//
// Ham Sandwich Functions
//
/**
* Ham Sandwich is a module that is used to hook and call virtual functions of
* entities.
* Virtual functions are mod-specific functions. This means that in order
* for this to work on a mod, it needs to be configured with the hamdata.ini
* file.
* Be very careful with parameter passing to these functions.
*/
#if defined _hamsandwich_included
#endinput
#endif
#define _hamsandwich_included
#include <ham_const>
#pragma reqlib hamsandwich
#if !defined AMXMODX_NOAUTOLOAD
#pragma loadlib hamsandwich
#endif
/**
* Hooks the virtual table for the specified entity class.
* An example would be: RegisterHam(Ham_TakeDamage, "player", "player_hurt");
* Look at the Ham enum for parameter lists.
*
* @param function The function to hook.
* @param EntityClass The entity classname to hook.
* @param callback The forward to call.
* @param post Whether or not to forward this in post.
* @param specialbot Whether or not to enable support for bot without "player" classname.
* @return Returns a handle to the forward. Use EnableHamForward/DisableHamForward to toggle the forward on or off.
*/
native HamHook:RegisterHam(Ham:function, const EntityClass[], const Callback[], Post=0, bool:specialbot = false);
/**
* Hooks the virtual table for the player class.
* An example would be: RegisterHam(Ham_TakeDamage, "player_hurt");
* Look at the Ham enum for parameter lists.
*
* @param function The function to hook.
* @param callback The forward to call.
* @param post Whether or not to forward this in post.
* @return Returns a handle to the forward. Use EnableHamForward/DisableHamForward to toggle the forward on or off.
*/
stock HamHook:RegisterHamPlayer(Ham:function, const Callback[], Post=0)
{
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return RegisterHam(function, "player", Callback, Post, true);
}
/**
* Hooks the virtual table for the specified entity's class.
* An example would be: RegisterHam(Ham_TakeDamage, id, "player_hurt");
* Look at the Ham enum for parameter lists.
* Note: This will cause hooks for the entire internal class that the entity is
* not exclusively for the provided entity.
*
* @param function The function to hook.
* @param EntityId The entity classname to hook.
* @param callback The forward to call.
* @param post Whether or not to forward this in post.
* @return Returns a handle to the forward. Use EnableHamForward/DisableHamForward to toggle the forward on or off.
*/
native HamHook:RegisterHamFromEntity(Ham:function, EntityId, const Callback[], Post=0);
/**
* Stops a ham forward from triggering.
* Use the return value from RegisterHam as the parameter here!
*
* @param fwd The forward to stop.
*/
native DisableHamForward(HamHook:fwd);
/**
* Starts a ham forward back up.
* Use the return value from RegisterHam as the parameter here!
*
* @param fwd The forward to re-enable.
*/
native EnableHamForward(HamHook:fwd);
/**
* Executes the virtual function on the entity.
* Look at the Ham enum for parameter lists.
*
* @param function The function to call.
* @param id The id of the entity to execute it on.
*/
native ExecuteHam(Ham:function, this, any:...);
/**
* Executes the virtual function on the entity, this will trigger all hooks on that function.
* Be very careful about recursion!
* Look at the Ham enum for parameter lists.
*
* @param function The function to call.
* @param id The id of the entity to execute it on.
*/
native ExecuteHamB(Ham:function, this, any:...);
/**
* Gets the return status of the current hook.
* This is useful to determine what return natives to use.
*
* @return The current status of the hook (such as HAM_SUPERCEDE).
*/
native GetHamReturnStatus();
/**
* Gets the return value of a hook for hooks that return integers or booleans.
*
* @param output The variable to store the value in.
*/
native GetHamReturnInteger(&output);
/**
* Gets the return value of a hook for hooks that return float.
*
* @param output The variable to store the value in.
*/
native GetHamReturnFloat(&Float:output);
/**
* Gets the return value of a hook for hooks that return Vectors.
*
* @param output The variable to store the value in.
*/
native GetHamReturnVector(Float:output[3]);
/**
* Gets the return value of a hook for hooks that return entities.
*
* @param output The variable to store the value in. Will be -1 on null.
*/
native GetHamReturnEntity(&output);
/**
* Gets the return value of a hook for hooks that return strings.
*
* @param output The buffer to store the string in.
* @param size The string size of the buffer.
*/
native GetHamReturnString(output[], size);
/**
* Gets the original return value of a hook for hooks that return integers or booleans.
*
* @param output The variable to store the value in.
*/
native GetOrigHamReturnInteger(&output);
/**
* Gets the original return value of a hook for hooks that return floats.
*
* @param output The variable to store the value in.
*/
native GetOrigHamReturnFloat(&Float:output);
/**
* Gets the original return value of a hook for hooks that return Vectors.
*
* @param output The variable to store the value in.
*/
native GetOrigHamReturnVector(Float:output[3]);
/**
* Gets the original return value of a hook for hooks that return entities.
*
* @param output The variable to store the value in. -1 on null.
*/
native GetOrigHamReturnEntity(&output);
/**
* Gets the original return value of a hook for hooks that return strings.
*
* @param output The buffer to store the string in.
* @param size The size of the buffer.
*/
native GetOrigHamReturnString(output[], size);
/**
* Sets the return value of a hook that returns an integer or boolean.
* This needs to be used in conjunction with HAM_OVERRIDE or HAM_SUPERCEDE.
*
* @param value The value to set the return to.
*/
native SetHamReturnInteger(value);
/**
* Sets the return value of a hook that returns a float.
* This needs to be used in conjunction with HAM_OVERRIDE or HAM_SUPERCEDE.
*
* @param value The value to set the return to.
*/
native SetHamReturnFloat(Float:value);
/**
* Sets the return value of a hook that returns a Vector.
* This needs to be used in conjunction with HAM_OVERRIDE or HAM_SUPERCEDE.
*
* @param value The value to set the return to.
*/
native SetHamReturnVector(const Float:value[3]);
/**
* Sets the return value of a hook that returns an entity. Set to -1 for null.
* This needs to be used in conjunction with HAM_OVERRIDE or HAM_SUPERCEDE.
*
* @param value The value to set the return to.
*/
native SetHamReturnEntity(value);
/**
* Sets the return value of a hook that returns a string.
* This needs to be used in conjunction with HAM_OVERRIDE or HAM_SUPERCEDE.
*
* @param value The value to set the return to.
*/
native SetHamReturnString(const value[]);
/**
* Sets a parameter on the fly of the current hook. This has no effect in post hooks.
* Use this on parameters that are integers.
*
* @param which Which parameter to change. Starts at 1, and works up from the left to right. 1 is always "this".
* @param value The value to change it to.
*/
native SetHamParamInteger(which, value);
/**
* Sets a parameter on the fly of the current hook. This has no effect in post hooks.
* Use this on parameters that are floats.
*
* @param which Which parameter to change. Starts at 1, and works up from the left to right. 1 is always "this".
* @param value The value to change it to.
*/
native SetHamParamFloat(which, Float:value);
/**
* Sets a parameter on the fly of the current hook. This has no effect in post hooks.
* Use this on parameters that are Vectors.
*
* @param which Which parameter to change. Starts at 1, and works up from the left to right. 1 is always "this".
* @param value The value to change it to.
*/
native SetHamParamVector(which, const Float:value[3]);
/**
* Sets a parameter on the fly of the current hook. This has no effect in post hooks.
* Use this on parameters that are entities.
*
* @param which Which parameter to change. Starts at 1, and works up from the left to right. 1 is always "this".
* @param value The value to change it to.
*/
native SetHamParamEntity(which, value);
/**
* Sets a parameter on the fly of the current hook. This has no effect in post hooks.
* Use this on parameters that are strings.
*
* @param which Which parameter to change. Starts at 1, and works up from the left to right. 1 is always "this".
* @param ouput The value to change it to.
*/
native SetHamParamString(which, const output[]);
/**
* Sets a parameter on the fly of the current hook. This has no effect in post hooks.
* Use this on parameters that are trace result handles.
*
* @param which Which parameter to change. Starts at 1, and works up from the left to right. 1 is always "this".
* @param tr_handle The value to change it to.
*/
native SetHamParamTraceResult(which, tr_handle);
/**
* Sets a parameter on the fly of the current hook. This has no effect in post hooks.
* Use this on parameters that are trace result handles.
*
* @param which Which parameter to change. Starts at 1, and works up from the left to right. 1 is always "this".
* @param iteminfo_handle The value to change it to.
*/
native SetHamParamItemInfo(which, iteminfo_handle);
/**
* Gets a parameter on the fly of the current hook.
* Use this on parameters that are iteminfo result handles.
*
* @param iteminfo_handle Item info handle.
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* @param type Item info type. See HamItemInfo constants.
*/
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native GetHamItemInfo(iteminfo_handle, HamItemInfo:type, any:...);
/**
* Sets a parameter on the fly of the current hook.
* Use this on parameters that are iteminfo result handles.
*
* @param iteminfo_handle Item info handle.
* @param type Item info type. See HamItemInfo_ constants.
*/
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native SetHamItemInfo(iteminfo_handle, HamItemInfo:type, any:...);
/**
* Creates an ItemInfo handle. This value should never be altered.
* The handle can be used in Get/SetHamItemInfo.
*
* NOTE: You must call FreeHamItemInfo() on every handle made with CreateHamItemInfo().
*
* @return A new ItemInfo handle.
*/
native CreateHamItemInfo();
/**
* Frees an ItemIndo handle created with CreateHamItemInfo(). Do not call
* this more than once per handle, or on handles not created through
* CreateHamItemInfo().
*
* @param itemInfo_handle ItemInfo handle created via CreateHamItemInfo().
* @noreturn
*/
native FreeHamItemInfo(itemInfo_handle);
/**
* Returns whether or not the function for the specified Ham is valid.
* Things that would make it invalid would be bounds (an older module version
* may not have all of the functions), and the function not being found in
* the mod's hamdata.ini file.
*
* @param function The function to look up.
* @return true if the function is valid, false otherwise.
*/
native bool:IsHamValid(Ham:function);
/**
* This is used to compliment fakemeta's {get,set}_pdata_{int,float,string}.
* This requires the mod to have the pev and base fields set in hamdata.ini.
* Note this dereferences memory! Improper use of this will crash the server.
* This will return an index of the corresponding cbase field in private data.
* Returns -1 on a null entry.
*
* @param id The entity to examine the private data.
* @param offset The windows offset of the data.
* @param linuxdiff The linux difference of the data.
* @param macdiff The mac os x difference of the data.
* @return The index of the corresponding pdata field. -1 for none set.
*/
native get_pdata_cbase(id, offset, linuxdiff=5, macdiff=5);
/**
* This is used to compliment fakemeta's {get,set}_pdata_{int,float,string}.
* This requires the mod to have the pev and base fields set in hamdata.ini.
* This will set the corresponding cbase field in private data with the index.
* Pass -1 to null the entry.
*
* @param id The entity to examine the private data.
* @param offset The windows offset of the data.
* @param value The index to store, -1 for invalid
* @param linuxdiff The linux difference of the data.
* @param macdiff The mac os x difference of the data.
*/
native set_pdata_cbase(id, offset, value, linuxdiff=5, macdiff=5);
/**
* This is similar to the get_pdata_cbase, however it does not dereference memory.
* This is many times slower than get_pdata_cbase, and this should only be used
* for testing and finding of offsets, not actual release quality plugins.
* This will return an index of the corresponding cbase field in private data.
* Returns -1 on a null entry. -2 on an invalid entry.
*
* @param id Entry to examine the private data.
* @param offset The windows offset of the data.
* @param linuxdiff The linux difference of the data.
* @param macdiff The mac os x difference of the data.
* @return The index of the corresponding pdata field, -1 for null, -2 for invalid.
*/
native get_pdata_cbase_safe(id, offset, linuxdiff=5, macdiff=5);
// This is the callback from the module, this handles any fatal errors.
// This will in turn call the "HamFilter(Ham:id, HamError:err, const reason[])" public, if it exists.
// Return PLUGIN_HANDLED from within the HamFilter to stop the plugin from failing.
// Any other return value will fail the plugin.
// You do not need to have a HamFilter, if there is none, all fatal errors will fail the plugin.
// Do not modify this!
public __fatal_ham_error(Ham:id, HamError:err, const reason[])
{
new func=get_func_id("HamFilter", -1);
new bool:fail=true;
if (func != -1 && callfunc_begin_i(func, -1)==1)
{
callfunc_push_int(_:id);
callfunc_push_int(_:err);
callfunc_push_str(reason, false);
if (callfunc_end()==PLUGIN_HANDLED)
{
fail=false;
}
}
if (fail)
{
set_fail_state(reason);
}
}