670 lines
16 KiB
C++
670 lines
16 KiB
C++
// vim: set ts=4 sw=4 tw=99 noet:
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//
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// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
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// Copyright (C) The AMX Mod X Development Team.
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//
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// This software is licensed under the GNU General Public License, version 3 or higher.
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// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
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// https://alliedmods.net/amxmodx-license
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#include "CvarManager.h"
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#include "amxmodx.h"
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#include <CDetour/detours.h>
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#include <auto-string.h>
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#include <resdk/mod_rehlds_api.h>
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CvarManager g_CvarManager;
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void (*Cvar_DirectSet_Actual)(struct cvar_s* var, const char *value) = nullptr;
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void Cvar_DirectSet_Custom(struct cvar_s *var, const char *value, IRehldsHook_Cvar_DirectSet *chain = nullptr)
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{
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CvarInfo* info = nullptr;
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if (!var || !value // Sanity checks against bogus pointers.
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|| strcmp(var->string, value) == 0 // Make sure old and new values are different to not trigger callbacks.
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|| !g_CvarManager.CacheLookup(var->name, &info)) // No data in cache, nothing to do.
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{
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chain ? chain->callNext(var, value) : Cvar_DirectSet_Actual(var, value);
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return;
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}
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if (info->bound.hasMin || info->bound.hasMax) // cvar_s doesn't have min/max mechanism, so we check things here.
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{
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float fvalue = atof(value);
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bool oob = false;
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if (info->bound.hasMin && fvalue < info->bound.minVal)
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{
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oob = true;
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fvalue = info->bound.minVal;
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}
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else if (info->bound.hasMax && fvalue > info->bound.maxVal)
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{
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oob = true;
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fvalue = info->bound.maxVal;
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}
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if (oob) // Found value out of bound, set new value and block original call.
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{
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CVAR_SET_FLOAT(var->name, fvalue);
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return;
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}
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}
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ke::AString oldValue; // We save old value since it will be likely changed after original function called.
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if (!info->hooks.empty())
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{
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oldValue = var->string;
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}
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chain ? chain->callNext(var, value) : Cvar_DirectSet_Actual(var, value);
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if (!info->binds.empty())
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{
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for (size_t i = 0; i < info->binds.length(); ++i)
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{
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CvarBind* bind = info->binds[i];
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switch (bind->type)
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{
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case CvarBind::CvarType_Int:
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{
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*bind->varAddress = atoi(var->string);
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break;
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}
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case CvarBind::CvarType_Float:
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{
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float fvalue = atof(var->string);
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*bind->varAddress = amx_ftoc(fvalue);
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break;
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}
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case CvarBind::CvarType_String:
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{
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set_amxstring_simple(bind->varAddress, var->string, bind->varLength);
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break;
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}
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}
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}
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}
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if (!info->hooks.empty())
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{
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for (size_t i = 0; i < info->hooks.length(); ++i)
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{
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CvarHook* hook = info->hooks[i];
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if (hook->forward->state == AutoForward::FSTATE_OK) // Our callback can be enable/disabled by natives.
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{
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executeForwards(hook->forward->id, reinterpret_cast<cvar_t*>(var), oldValue.chars(), var->string);
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}
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}
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}
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}
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void Cvar_DirectSet(struct cvar_s *var, const char *value)
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{
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Cvar_DirectSet_Custom(var, value);
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}
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void Cvar_DirectSet_RH(IRehldsHook_Cvar_DirectSet *chain, cvar_t *var, const char *value)
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{
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Cvar_DirectSet_Custom(var, value, chain);
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}
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CvarManager::CvarManager() : m_AmxmodxCvars(0), m_HookDetour(nullptr), m_ReHookEnabled(false)
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{
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}
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CvarManager::~CvarManager()
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{
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OnAmxxShutdown();
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}
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void CvarManager::CreateCvarHook(void)
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{
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// void PF_Cvar_DirectSet(struct cvar_s *var, const char *value) // = pfnCvar_DirectSet
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// {
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// Cvar_DirectSet(var, value); // <- We want to hook this.
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// }
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if (!RehldsHookchains)
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{
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void *functionAddress = nullptr;
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if (CommonConfig && CommonConfig->GetMemSig("Cvar_DirectSet", &functionAddress) && functionAddress)
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{
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// Disabled by default.
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m_HookDetour = DETOUR_CREATE_STATIC_FIXED(Cvar_DirectSet, functionAddress);
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}
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else
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{
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AMXXLOG_Log("Binding/Hooking cvars have been disabled - %s.", RehldsApi ? "update ReHLDS" : "check your gamedata files");
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}
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}
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}
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void CvarManager::EnableHook()
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{
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if (RehldsHookchains)
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{
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if (!m_ReHookEnabled)
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{
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RehldsHookchains->Cvar_DirectSet()->registerHook(Cvar_DirectSet_RH);
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m_ReHookEnabled = true;
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}
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}
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else if (m_HookDetour)
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{
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m_HookDetour->EnableDetour();
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}
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}
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void CvarManager::DisableHook()
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{
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if (RehldsHookchains)
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{
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if (m_ReHookEnabled)
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{
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RehldsHookchains->Cvar_DirectSet()->unregisterHook(Cvar_DirectSet_RH);
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m_ReHookEnabled = false;
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}
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}
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else if (m_HookDetour)
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{
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m_HookDetour->DisableDetour();
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}
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}
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void CvarManager::DestroyHook()
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{
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DisableHook();
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if (m_HookDetour)
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{
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m_HookDetour->Destroy();
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}
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}
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CvarInfo* CvarManager::CreateCvar(const char* name, const char* value, const char* plugin, int pluginId, int flags,
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const char* helpText)
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{
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cvar_t* var = nullptr;
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CvarInfo* info = nullptr;
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if (!CacheLookup(name, &info))
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{
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// Not cached - Is cvar already exist?
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var = CVAR_GET_POINTER(name);
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// Whether it exists, we need to prepare a new entry.
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info = new CvarInfo(name, helpText, plugin, pluginId);
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if (var)
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{
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// Cvar already exists. Just copy.
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// "string" will be set after. "value" and "next" are automatically set.
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info->var = var;
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info->defaultval = var->string;
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info->amxmodx = false;
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}
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else
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{
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// Registers a new cvar.
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static cvar_t cvar_reg_helper;
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// "string" will be set after. "value" and "next" are automatically set.
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cvar_reg_helper.name = info->name.chars();
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cvar_reg_helper.string = "";
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cvar_reg_helper.flags = flags;
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// Adds cvar to global list.
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CVAR_REGISTER(&cvar_reg_helper);
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// Registering can fail if name is already a registered command.
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var = CVAR_GET_POINTER(name);
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// If so, we can't go further.
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if (!var)
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{
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delete info;
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return nullptr;
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}
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// If ok, we got a valid pointer, we can copy.
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info->var = var;
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info->defaultval = value;
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info->amxmodx = true;
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// Keeps track count of cvars registered by AMXX.
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++m_AmxmodxCvars;
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}
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// Add a new entry in the caches.
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m_Cvars.append(info);
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m_Cache.insert(name, info);
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// Make sure that whether an existing or new cvar is set to the given value.
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CVAR_DIRECTSET(var, value);
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}
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else if (info->pluginId == -1)
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{
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// In situation where a plugin has been modified/recompiled
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// or new added plugins, and a change map occurs. We want to keep data up to date.
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info->bound.hasMin = false;
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info->bound.minVal = 0;
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info->bound.hasMax = false;
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info->bound.maxVal = 0;
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info->defaultval = value;
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info->description = helpText;
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info->pluginId = pluginId;
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}
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// Detour is disabled on map change.
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// Don't enable it unless there are things to do.
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if ((info->bound.hasMin || info->bound.hasMax))
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{
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EnableHook();
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}
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return info;
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}
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CvarInfo* CvarManager::FindCvar(const char* name)
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{
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cvar_t* var = nullptr;
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CvarInfo* info = nullptr;
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// Do we have already cvar in cache?
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if (CacheLookup(name, &info))
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{
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return info;
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}
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// Cvar doesn't exist.
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if (!(var = CVAR_GET_POINTER(name)))
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{
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return nullptr;
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}
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// Create a new entry.
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info = new CvarInfo(name);
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info->var = var;
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// Add entry in the caches.
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m_Cvars.append(info);
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m_Cache.insert(name, info);
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return info;
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}
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CvarInfo* CvarManager::FindCvar(size_t index)
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{
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// Used by get_plugins_cvar native.
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// For compatibility, only cvars registered by AMXX are concerned.
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size_t iter_id = 0;
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for (CvarsList::iterator iter = m_Cvars.begin(); iter != m_Cvars.end(); iter++)
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{
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if (iter->amxmodx && iter_id++ == index)
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{
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return *(iter);
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}
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}
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return nullptr;
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}
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bool CvarManager::CacheLookup(const char* name, CvarInfo** info)
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{
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return m_Cache.retrieve(name, info);
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}
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AutoForward* CvarManager::HookCvarChange(cvar_t* var, AMX* amx, cell param, const char** callback)
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{
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CvarInfo* info = nullptr;
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// A cvar is guaranteed to be in cache if pointer is got from
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// get_cvar_pointer and register_cvar natives. Though it might be
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// provided by another way. If by any chance we run in such
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// situation, we create a new entry right now.
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if (!CacheLookup(var->name, &info))
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{
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// Create a new entry.
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info = new CvarInfo(var->name);
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info->var = var;
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// Add entry in the caches.
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m_Cvars.append(info);
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m_Cache.insert(info->name.chars(), info);
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}
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int length;
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*callback = get_amxstring(amx, param, 0, length);
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int forwardId = registerSPForwardByName(amx, *callback, FP_CELL, FP_STRING, FP_STRING, FP_DONE);
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// Invalid callback, it could be: not a public function, wrongly named, or simply missing.
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if (forwardId == -1)
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{
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return nullptr;
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}
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// Hook is disabled on map change.
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EnableHook();
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AutoForward* forward = new AutoForward(forwardId, *callback);
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info->hooks.append(new CvarHook(g_plugins.findPlugin(amx)->getId(), forward));
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return forward;
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}
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bool CvarManager::BindCvar(CvarInfo* info, CvarBind::CvarType type, AMX* amx, cell varofs, size_t varlen)
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{
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if (varofs > amx->hlw) // If variable address is not inside global area, we can't bind it.
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{
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LogError(amx, AMX_ERR_NATIVE, "Cvars can only be bound to global variables");
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return false;
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}
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int pluginId = g_plugins.findPluginFast(amx)->getId();
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cell* address = get_amxaddr(amx, varofs);
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// To avoid unexpected behavior, probably better to error such situations.
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for (size_t i = 0; i < info->binds.length(); ++i)
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{
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CvarBind* bind = info->binds[i];
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if (bind->pluginId == pluginId)
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{
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if (bind->varAddress == address)
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{
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LogError(amx, AMX_ERR_NATIVE, "A global variable can not be bound to multiple Cvars");
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return false;
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}
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}
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}
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CvarBind* bind = new CvarBind(pluginId, type, get_amxaddr(amx, varofs), varlen);
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info->binds.append(bind);
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// Update right away variable with current cvar value.
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switch (type)
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{
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case CvarBind::CvarType_Int:
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*bind->varAddress = atoi(info->var->string);
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break;
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case CvarBind::CvarType_Float:
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*bind->varAddress = amx_ftoc(info->var->value);
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break;
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case CvarBind::CvarType_String:
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set_amxstring_simple(bind->varAddress, info->var->string, bind->varLength);
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break;
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}
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// Hook is disabled on map change.
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EnableHook();
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return true;
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}
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void CvarManager::SetCvarMin(CvarInfo* info, bool set, float value, int pluginId)
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{
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info->bound.hasMin = set;
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info->bound.minPluginId = pluginId;
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if (set)
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{
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// Hook is disabled on map change.
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EnableHook();
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info->bound.minVal = value;
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// Current value is already in the allowed range.
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if (info->var->value >= value)
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{
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return;
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}
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// Update if needed.
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CVAR_SET_FLOAT(info->var->name, value);
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}
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}
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void CvarManager::SetCvarMax(CvarInfo* info, bool set, float value, int pluginId)
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{
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info->bound.hasMax = set;
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info->bound.maxPluginId = pluginId;
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if (set)
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{
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// Hook is disabled on map change.
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EnableHook();
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info->bound.maxVal = value;
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// Current value is already in the allowed range.
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if (info->var->value <= value)
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{
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return;
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}
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// Update if needed.
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CVAR_SET_FLOAT(info->var->name, value);
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}
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}
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size_t CvarManager::GetRegCvarsCount()
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{
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return m_AmxmodxCvars;
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}
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CvarsList* CvarManager::GetCvarsList()
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{
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return &m_Cvars;
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}
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ke::AutoString convertFlagsToString(int flags)
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{
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ke::AutoString flagsName;
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if (flags > 0)
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{
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if (flags & FCVAR_ARCHIVE) flagsName = flagsName + "FCVAR_ARCHIVE ";
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if (flags & FCVAR_USERINFO) flagsName = flagsName + "FCVAR_USERINFO ";
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if (flags & FCVAR_SERVER) flagsName = flagsName + "FCVAR_SERVER ";
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if (flags & FCVAR_EXTDLL) flagsName = flagsName + "FCVAR_EXTDLL ";
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if (flags & FCVAR_CLIENTDLL) flagsName = flagsName + "FCVAR_CLIENTDLL ";
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if (flags & FCVAR_PROTECTED) flagsName = flagsName + "FCVAR_PROTECTED ";
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if (flags & FCVAR_SPONLY) flagsName = flagsName + "FCVAR_SPONLY ";
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if (flags & FCVAR_PRINTABLEONLY) flagsName = flagsName + "FCVAR_PRINTABLEONLY ";
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if (flags & FCVAR_UNLOGGED) flagsName = flagsName + "FCVAR_UNLOGGED ";
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if (flags & FCVAR_NOEXTRAWHITEPACE) flagsName = flagsName + "FCVAR_NOEXTRAWHITEPACE ";
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}
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if (!flagsName.length())
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{
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flagsName = "-";
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}
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return flagsName;
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}
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void CvarManager::OnConsoleCommand()
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{
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size_t index = 0;
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size_t indexToSearch = 0;
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ke::AString partialName;
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int argcount = CMD_ARGC();
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// amxx cvars [partial plugin name] [index from listing]
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// E.g.:
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// amxx cvars test <- list all cvars from plugin name starting by "test"
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// amxx cvars 2 <- show informations about cvar in position 2 from "amxx cvars" list
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// amxx cvars test 2 <- show informations about cvar in position 2 from "amxx cvars test" list
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if (argcount > 2)
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{
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const char* argument = CMD_ARGV(2);
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indexToSearch = atoi(argument); // amxx cvars 2
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if (!indexToSearch)
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{
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partialName = argument; // amxx cvars test
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if (argcount > 3) // amxx cvars test 2
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{
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indexToSearch = atoi(CMD_ARGV(3));
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}
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}
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}
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if (!indexToSearch)
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{
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print_srvconsole("\nManaged cvars:\n");
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print_srvconsole(" %-24.23s %-24.23s %-18.17s %-8.7s %-8.7s %-8.7s\n", "NAME", "VALUE", "PLUGIN", "HOOKED", "MIN", "MAX");
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print_srvconsole(" - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - \n");
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}
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for (CvarsList::iterator iter = m_Cvars.begin(); iter != m_Cvars.end(); iter++)
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{
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CvarInfo* ci = (*iter);
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// List any cvars having a status either created, hooked or bound by a plugin.
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bool in_list = ci->amxmodx || !ci->binds.empty() || !ci->hooks.empty() || ci->bound.hasMin || ci->bound.hasMax;
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if (in_list && (!partialName.length() || strncmp(ci->plugin.chars(), partialName.chars(), partialName.length()) == 0))
|
|
{
|
|
if (!indexToSearch)
|
|
{
|
|
print_srvconsole(" [%3d] %-24.23s %-24.23s %-18.17s %-8.7s ", ++index, ci->name.chars(), ci->var->string,
|
|
ci->plugin.length() ? ci->plugin.chars() : "-",
|
|
ci->hooks.empty() ? "no" : "yes");
|
|
|
|
(ci->bound.hasMin) ? print_srvconsole("%-8.2f ", ci->bound.minVal) : print_srvconsole("%-8.7s ", "-");
|
|
(ci->bound.hasMax) ? print_srvconsole("%-8.2f ", ci->bound.maxVal) : print_srvconsole("%-8.7s ", "-");
|
|
print_srvconsole("\n");
|
|
}
|
|
else
|
|
{
|
|
if (++index != indexToSearch)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
print_srvconsole("\nCvar details :\n\n");
|
|
print_srvconsole(" Cvar name : %s\n", ci->var->name);
|
|
print_srvconsole(" Value : %s\n", ci->var->string);
|
|
print_srvconsole(" Def. value : %s\n", ci->defaultval.chars());
|
|
print_srvconsole(" Description : %s\n", ci->description.chars());
|
|
print_srvconsole(" Flags : %s\n\n", convertFlagsToString(ci->var->flags).ptr());
|
|
|
|
print_srvconsole(" %-12s %-26.25s %s\n", "STATUS", "PLUGIN", "INFOS");
|
|
print_srvconsole(" - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n");
|
|
|
|
if (ci->amxmodx)
|
|
{
|
|
print_srvconsole(" Registered %-26.25s %s\n", ci->plugin.chars(), "-");
|
|
}
|
|
|
|
if (ci->bound.hasMin)
|
|
{
|
|
print_srvconsole(" Min value %-26.25s %f\n", g_plugins.findPlugin(ci->bound.minPluginId)->getName(), ci->bound.minVal);
|
|
}
|
|
|
|
if (ci->bound.hasMax)
|
|
{
|
|
print_srvconsole(" Max value %-26.25s %f\n", g_plugins.findPlugin(ci->bound.maxPluginId)->getName(), ci->bound.maxVal);
|
|
}
|
|
|
|
if (!ci->binds.empty())
|
|
{
|
|
for (size_t i = 0; i < ci->binds.length(); ++i)
|
|
{
|
|
print_srvconsole(" Bound %-26.25s %s\n", g_plugins.findPlugin(ci->binds[i]->pluginId)->getName(), "-");
|
|
}
|
|
}
|
|
|
|
if (!ci->hooks.empty())
|
|
{
|
|
for (size_t i = 0; i < ci->hooks.length(); ++i)
|
|
{
|
|
CvarHook* hook = ci->hooks[i];
|
|
|
|
print_srvconsole(" Hooked %-26.25s %s (%s)\n", g_plugins.findPlugin(hook->pluginId)->getName(),
|
|
hook->forward->callback.chars(),
|
|
hook->forward->state == AutoForward::FSTATE_OK ? "active" : "inactive");
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void CvarManager::OnPluginUnloaded()
|
|
{
|
|
// Clear only plugin hooks list.
|
|
for (CvarsList::iterator cvar = m_Cvars.begin(); cvar != m_Cvars.end(); cvar++)
|
|
{
|
|
for (size_t i = 0; i < (*cvar)->binds.length(); ++i)
|
|
{
|
|
delete (*cvar)->binds[i];
|
|
}
|
|
|
|
for (size_t i = 0; i < (*cvar)->hooks.length(); ++i)
|
|
{
|
|
delete (*cvar)->hooks[i];
|
|
}
|
|
|
|
if ((*cvar)->amxmodx) // Mark registered cvars so we can refresh default datas at next map.
|
|
{
|
|
(*cvar)->pluginId = -1;
|
|
}
|
|
|
|
(*cvar)->binds.clear();
|
|
(*cvar)->hooks.clear();
|
|
}
|
|
|
|
// There is no point to enable hook if at next map change
|
|
// no plugins hook cvars.
|
|
DisableHook();
|
|
}
|
|
|
|
void CvarManager::OnAmxxShutdown()
|
|
{
|
|
// Free everything.
|
|
|
|
CvarsList::iterator iter = m_Cvars.begin();
|
|
|
|
while (iter != m_Cvars.end())
|
|
{
|
|
CvarInfo* cvar = (*iter);
|
|
|
|
for (size_t i = 0; i < cvar->binds.length(); ++i)
|
|
{
|
|
delete cvar->binds[i];
|
|
}
|
|
|
|
for (size_t i = 0; i < cvar->hooks.length(); ++i)
|
|
{
|
|
delete cvar->hooks[i];
|
|
}
|
|
|
|
iter = m_Cvars.erase(iter);
|
|
|
|
delete cvar;
|
|
}
|
|
|
|
m_Cache.clear();
|
|
|
|
DestroyHook();
|
|
}
|