mirror of
https://github.com/alliedmodders/metamod-source.git
synced 2024-11-28 10:24:20 +01:00
553 lines
16 KiB
C++
553 lines
16 KiB
C++
/*
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* vim: set ts=4 :
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* ======================================================
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* Metamod:Source
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* Copyright (C) 2004-2008 AlliedModders LLC and authors.
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* All rights reserved.
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* ======================================================
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*
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* This software is provided 'as-is', without any express or implied warranty.
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* In no event will the authors be held liable for any damages arising from
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* the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software in a
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* product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*
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* Version: $Id$
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*/
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#ifndef _INCLUDE_ISMM_PLUGIN_H
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#define _INCLUDE_ISMM_PLUGIN_H
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/**
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* @brief Plugin API interface.
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* @file ISmmPlugin.h These are callbacks that plugins can implement without hooks.
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* The pure-virtual ISmmPlugin callbacks must be implemented for the load to load.
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*/
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#include <sourcehook.h>
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#include <IPluginManager.h>
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#include <ISmmAPI.h>
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#include <ISmmPluginExt.h>
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#ifndef META_NO_HL2SDK
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#if META_IS_SOURCE2
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#include <interfaces/interfaces.h>
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#else
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#include <tier1/interface.h>
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#endif
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#endif
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class IServerPluginCallbacks;
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// Interface return status, binary-compatible with HL2SDK's IFACE_OK and IFACE_FAILED.
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enum
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{
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META_IFACE_OK = 0,
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META_IFACE_FAILED
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};
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namespace SourceMM
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{
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class ISmmAPI;
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/**
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* @brief Callbacks that a plugin must expose.
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*/
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class ISmmPlugin
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{
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public:
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/**
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* @brief Called to request the plugin's API version.
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*
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* This is the first callback invoked, and always remains at the top
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* of the virtual table.
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*
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* @return Plugin API version.
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*/
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virtual int GetApiVersion()
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{
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return METAMOD_PLAPI_VERSION;
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}
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/**
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* @brief Virtual destructor so GCC doesn't complain.
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*/
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virtual ~ISmmPlugin()
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{
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}
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public:
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/**
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* @brief Called on plugin load.
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*
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* This is called as DLLInit() executes - after the parameters are
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* known, but before the original GameDLL function is called.
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* Therefore, you cannot hook it, but you don't need to - Load() is
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* basically your hook. You can override factories before the engine
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* and gamedll exchange them. However, take care to note that if your
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* plugin is unloaded, and the gamedll/engine have cached an interface
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* you've passed, something will definitely crash. Be careful.
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*
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* @param id Internal id of plugin. Saved globally by PLUGIN_SAVEVARS()
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* @param ismm External API for SourceMM. Saved globally by PLUGIN_SAVEVARS()
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* @param error Error message buffer
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* @param maxlength Size of error message buffer
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* @param late Set to true if your plugin was loaded late (not at server load).
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* @return True if successful, return false to reject the load.
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*/
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virtual bool Load(PluginId id, ISmmAPI *ismm, char *error, size_t maxlength, bool late) =0;
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/**
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* @brief Called when all plugins have been loaded.
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*
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* This is called after DLLInit(), and thus the mod has been mostly initialized.
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* It is also safe to assume that all other (automatically loaded) plugins are now
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* ready to start interacting, because they are all loaded.
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*/
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virtual void AllPluginsLoaded()
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{
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}
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/**
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* @brief Called when your plugin is "queried".
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*
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* This is useful for rejecting a loaded state. For example, if your
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* plugin wants to stop operating, it can simply return false and copy
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* an error message. This will notify other plugins or MM:S of
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* something bad that happened. MM:S will not cache the return state,
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* so if you return false, your plugin will not actually be paused or
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* unloaded. This callback will be called when:
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* - Another plugin requests it
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* - Someone types "meta list", it will show up as "REFUSED"
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* - When Metamod need to re-check the plugin's status
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* - If the plugin does something like overload a factory, Metamod
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* will make sure the Query() returns true before calling it.
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* Also note that this query will only override Metamod when the
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* plugin is running and not paused.
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*
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* @param error Buffer for error message, or NULL if none.
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* @param maxlen Maximum length of error buffer.
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* @return Status code - true for okay, false for badness.
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*/
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virtual bool QueryRunning(char *error, size_t maxlen)
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{
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return true;
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}
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/**
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* @brief Called on plugin unload. You can return false if you know
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* your plugin is not capable of restoring critical states it modifies.
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*
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* @param error Error message buffer
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* @param maxlen Size of error message buffer
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* @return True on success, return false to request no unload.
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*/
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virtual bool Unload(char *error, size_t maxlen)
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{
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return true;
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}
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/**
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* @brief Called on plugin pause.
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*
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* @param error Error message buffer
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* @param maxlen Size of error message buffer
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* @return True on success, return false to request no pause.
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*/
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virtual bool Pause(char *error, size_t maxlen)
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{
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return true;
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}
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/**
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* @brief Called on plugin unpause.
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*
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* @param error Error message buffer
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* @param maxlen Size of error message buffer
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* @return True on success, return false to request no unpause.
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*/
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virtual bool Unpause(char *error, size_t maxlen)
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{
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return true;
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}
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public:
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/** @brief Return author as string */
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virtual const char *GetAuthor() =0;
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/** @brief Return plugin name as string */
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virtual const char *GetName() =0;
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/** @brief Return a description as string */
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virtual const char *GetDescription() =0;
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/** @brief Return a URL as string */
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virtual const char *GetURL() =0;
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/** @brief Return quick license code as string */
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virtual const char *GetLicense() =0;
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/** @brief Return version as string */
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virtual const char *GetVersion() =0;
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/** @brief Return author as string */
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virtual const char *GetDate() =0;
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/** @brief Return author as string */
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virtual const char *GetLogTag() =0;
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};
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/**
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* @brief Various events that Metamod can fire.
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*/
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class IMetamodListener
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{
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public:
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/**
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* @brief Called when a plugin is loaded.
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*
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* @param id Id of the plugin.
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*/
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virtual void OnPluginLoad(PluginId id)
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{
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}
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/**
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* @brief Called when a plugin is unloaded.
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*
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* @param id Id of the plugin.
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*/
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virtual void OnPluginUnload(PluginId id)
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{
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}
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/**
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* @brief Called when a plugin is paused.
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*
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* @param id Id of the plugin.
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*/
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virtual void OnPluginPause(PluginId id)
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{
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}
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/**
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* @brief Called when a plugin is unpaused.
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*
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* @param id Id of the plugin.
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*/
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virtual void OnPluginUnpause(PluginId id)
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{
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}
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/**
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* @brief Called when the level is loaded (after GameInit, before
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* ServerActivate).
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*
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* To override this, hook IServerGameDLL::LevelInit().
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*
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* @param pMapName Name of the map.
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* @param pMapEntities Lump string of the map entities, in KeyValues
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* format.
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* @param pOldLevel Unknown.
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* @param pLandmarkName Unknown.
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* @param loadGame Unknown.
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* @param background Unknown.
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*/
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virtual void OnLevelInit(char const *pMapName,
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char const *pMapEntities,
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char const *pOldLevel,
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char const *pLandmarkName,
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bool loadGame,
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bool background)
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{
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}
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/**
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* @brief Called when the level is shut down. May be called more than
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* once.
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*/
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virtual void OnLevelShutdown()
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{
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}
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/**
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* @brief Called when engineFactory() is used through Metamod:Source's
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* wrapper. This can be used to provide interfaces to other plugins or
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* the GameDLL.
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*
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* If ret is passed, you should fill it with META_IFACE_OK or META_IFACE_FAILED.
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*
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* @param iface Interface string.
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* @param ret Optional pointer to store return code.
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* @return Generic pointer to the interface, or NULL if
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* not found.
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*/
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virtual void *OnEngineQuery(const char *iface, int *ret)
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{
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if (ret)
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{
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*ret = META_IFACE_FAILED;
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}
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return NULL;
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}
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/**
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* @brief Called when the physics factory is used through
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* Metamod:Source's wrapper. This can be used to provide interfaces to
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* other plugins.
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*
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* If ret is passed, you should fill it with META_IFACE_OK or META_IFACE_FAILED.
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*
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* @param iface Interface string.
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* @param ret Optional pointer to store return code.
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* @return Generic pointer to the interface, or NULL if
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* not found.
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*/
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virtual void *OnPhysicsQuery(const char *iface, int *ret)
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{
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if (ret)
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{
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*ret = META_IFACE_FAILED;
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}
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return NULL;
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}
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/**
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* @brief Called when the filesystem factory is used through
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* Metamod:Source's wrapper. This can be used to provide interfaces to
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* other plugins.
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*
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* If ret is passed, you should fill it with META_IFACE_OK or META_IFACE_FAILED.
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*
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* @param iface Interface string.
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* @param ret Optional pointer to store return code.
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* @return Generic pointer to the interface, or NULL if not
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* found.
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*/
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virtual void *OnFileSystemQuery(const char *iface, int *ret)
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{
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if (ret)
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{
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*ret = META_IFACE_FAILED;
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}
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return NULL;
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}
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/**
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* @brief Called when the server DLL's factory is used through
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* Metamod:Source's wrapper. This can be used to provide interfaces to
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* other plugins.
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*
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* If ret is passed, you should fill it with META_IFACE_OK or META_IFACE_FAILED.
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*
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* @param iface Interface string.
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* @param ret Optional pointer to store return code.
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* @return Generic pointer to the interface, or NULL if not
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* found.
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*/
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virtual void *OnGameDLLQuery(const char *iface, int *ret)
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{
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if (ret)
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{
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*ret = META_IFACE_FAILED;
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}
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return NULL;
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}
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/**
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* @brief Called when Metamod's own factory is invoked.
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* This can be used to provide interfaces to other plugins.
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*
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* If ret is passed, you should fill it with META_IFACE_OK or META_IFACE_FAILED.
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*
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* @param iface Interface string.
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* @param ret Optional pointer to store return code.
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* @return Generic pointer to the interface, or NULL if not
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* found.
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*/
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virtual void *OnMetamodQuery(const char *iface, int *ret)
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{
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if (ret)
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{
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*ret = META_IFACE_FAILED;
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}
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return NULL;
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}
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/**
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* @brief Called when Metamod:Source acquires a valid
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* IServerPluginCallbacks pointer to be used for hooking by plugins.
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*
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* This will only be called after a call to ISmmAPI::EnableVSPListener().
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* If called before GameInit, this callback will occur before LevelInit.
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* Otherwise, it will be called on the first call after that.
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*
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* This callback is provided to all plugins regardless of which (or how
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* many) called EnableVSPListener(), but only if at least one did in
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* fact enable it, and only once for all plugins. That is, a late
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* loading plugin should use ISmmAPI::GetVSPInfo() before relying on
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* this callback.
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*
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* This callback is never called if Metamod:Source is in VSP mode.
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* If in VSP mode, a VSP instance is automatically and always available
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* via ISmmAPI::GetVSPInfo(), which should be called anyway (to handle
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* late loading cases).
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*
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* @param iface Interface pointer. If NULL, then the VSP
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* listening construct failed to initialize and
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* is not available.
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*/
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virtual void OnVSPListening(IServerPluginCallbacks *iface)
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{
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}
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/**
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* @brief Called when Metamod:Source is about to remove a concommand or
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* convar. This can also be called if ISmmAPI::UnregisterConCmdBase is
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* used by a plugin.
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*
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* @param id Id of the plugin that created the concommand or
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* convar.
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* @param pCommand Pointer to concommand or convar that is being
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* removed.
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*/
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virtual void OnUnlinkConCommandBase(PluginId id, ConCommandBase *pCommand)
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{
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}
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};
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}
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#if !defined METAMOD_NO_AUTO_NAMESPACE
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using namespace SourceMM;
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#endif
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#define PL_EXPOSURE CreateInterface
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#define PL_EXPOSURE_C "CreateInterface"
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/**
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* @brief Exposes the plugin to the MM:S loader.
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*
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* @param name Deprecated - should be a variable name (like name).
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* @param var Name of the variable that contains the singleton.
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* This macro automatically takes the address of it, so
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* you should not pass a pointer to your plugin's
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* singleton.
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*/
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#ifdef META_NO_HL2SDK
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#define PL_EXPOSURE_FUNC(name, var) \
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SMM_API void *PL_EXPOSURE(const char *name, int *code) { \
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if (name && !strcmp(name, METAMOD_PLAPI_NAME)) { \
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return static_cast<void *>(&var); \
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} \
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return NULL; \
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}
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#else
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// First param should be actual classname, not iface name, but we don't have that and it doesn't matter here.
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#define PL_EXPOSURE_FUNC(name, var) EXPOSE_SINGLE_INTERFACE_GLOBALVAR(ISmmPlugin, ISmmPlugin, METAMOD_PLAPI_NAME, var);
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#endif
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#define PLUGIN_EXPOSE(name, var) \
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ISmmAPI *g_SMAPI = NULL; \
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ISmmPlugin *g_PLAPI = NULL; \
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PluginId g_PLID = (PluginId)0; \
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SourceHook::ISourceHook *g_SHPtr = NULL; \
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PL_EXPOSURE_FUNC(name, var)
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/**
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* @brief This should be in one of your header files, if you wish
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* to use values like g_SHPtr in other files.
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*/
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#define PLUGIN_GLOBALVARS() \
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extern SourceHook::ISourceHook *g_SHPtr; \
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extern ISmmAPI *g_SMAPI; \
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extern ISmmPlugin *g_PLAPI; \
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extern PluginId g_PLID;
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/**
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* @brief This should be the first line in your Load callback.
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*/
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#define PLUGIN_SAVEVARS() \
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g_SMAPI = ismm; \
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g_SHPtr = static_cast<SourceHook::ISourceHook *>(ismm->MetaFactory(MMIFACE_SOURCEHOOK, NULL, NULL)); \
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g_PLAPI = static_cast<ISmmPlugin *>(this); \
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g_PLID = id;
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#define META_LOG g_SMAPI->LogMsg
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#define META_REGCMD(name) g_SMAPI->RegisterConCommandBase(g_PLAPI, name##_command)
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#define META_REGCVAR(var) g_SMAPI->RegisterConCommandBase(g_PLAPI, var)
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#define META_UNREGCMD(name) g_SMAPI->UnregisterConCommandBase(g_PLAPI, name##_command)
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#define META_UNREGCVAR(var) g_SMAPI->UnregisterConCommandBase(g_PLAPI, var)
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#define META_CONPRINT g_SMAPI->ConPrint
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#define META_CONPRINTF g_SMAPI->ConPrintf
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/* Probably should use this up above someday */
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#define CONCMD_VARNAME(name) name##_command
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#if !defined SMM_API
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#if defined __WIN32__ || defined _WIN32 || defined WIN32
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#define SMM_API extern "C" __declspec(dllexport)
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#elif defined __GNUC__
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#define SMM_API extern "C" __attribute__ ((visibility("default")))
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#endif
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#endif //!defined SMM_API
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/**
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* @brief Macro for automatically getting a current or newer Valve interface.
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*
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* @param v_factory Factory method to use from ISmmAPI (such as engineFactory).
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* @param v_var Variable name to store into.
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* @param v_type Interface type (do not include the pointer/asterisk).
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* @param v_name Interface name.
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*/
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#define GET_V_IFACE_CURRENT(v_factory, v_var, v_type, v_name) \
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v_var = (v_type *)ismm->VInterfaceMatch(ismm->v_factory(), v_name); \
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if (!v_var) \
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{ \
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if (error && maxlen) \
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{ \
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ismm->Format(error, maxlen, "Could not find interface: %s", v_name); \
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} \
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return false; \
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}
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/**
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* @brief Same as GET_V_IFACE, except searches for any.
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*
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* @param v_factory Factory method to use from ISmmAPI (such as engineFactory).
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* @param v_var Variable name to store into.
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* @param v_type Interface type (do not include the pointer/asterisk).
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* @param v_name Interface name.
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*/
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#define GET_V_IFACE_ANY(v_factory, v_var, v_type, v_name) \
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v_var = (v_type *)ismm->VInterfaceMatch(ismm->v_factory(), v_name, 0); \
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if (!v_var) \
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{ \
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if (error && maxlen) \
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{ \
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ismm->Format(error, maxlen, "Could not find interface: %s", v_name); \
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} \
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return false; \
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}
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#endif //_INCLUDE_ISMM_PLUGIN_H
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