mirror of
https://github.com/rehlds/rehlds.git
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116 lines
3.6 KiB
C++
116 lines
3.6 KiB
C++
/*
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* In addition, as a special exception, the author gives permission to
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* link the code of this program with the Half-Life Game Engine ("HL
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* Engine") and Modified Game Libraries ("MODs") developed by Valve,
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* L.L.C ("Valve"). You must obey the GNU General Public License in all
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* respects for all of the code used other than the HL Engine and MODs
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* from Valve. If you modify this file, you may extend this exception
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* to your version of the file, but you are not obligated to do so. If
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* you do not wish to do so, delete this exception statement from your
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* version.
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*
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*/
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#include "precompiled.h"
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IBaseInterface *CreateFileSystemInterface();
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InterfaceReg iface = InterfaceReg(CreateFileSystemInterface, "VFileSystem009");
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#ifdef _WIN32
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const char *ORIGINAL_ENGINE_DLL_NAME = "swds.dll";
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const char *ORIGINAL_FILESYSTEM_DLL_NAME = "filesystem_stdio2.dll";
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#else
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const char *ORIGINAL_ENGINE_DLL_NAME = "engine_i486.so";
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const char *ORIGINAL_FILESYSTEM_DLL_NAME = "filesystem_stdio2.so";
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#endif
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CSysModule *g_pOriginalFileSystemModule = NULL;
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CreateInterfaceFn g_OriginalFileSystemFactory = NULL;
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IFileSystem *g_pOriginalFileSystem = NULL;
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IBaseInterface *CreateFileSystemInterface()
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{
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if (g_pOriginalFileSystem)
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return g_pOriginalFileSystem;
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if (g_pOriginalFileSystemModule)
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{
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g_OriginalFileSystemFactory = Sys_GetFactory(g_pOriginalFileSystemModule);
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if (g_OriginalFileSystemFactory)
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{
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int returnCode = 0;
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g_pOriginalFileSystem = reinterpret_cast<IBaseFileSystem *>(g_OriginalFileSystemFactory(FILESYSTEM_INTERFACE_VERSION, &returnCode));
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return g_pOriginalFileSystem;
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}
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}
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return NULL;
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}
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#ifdef _WIN32
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// DLL entry point
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BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
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{
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if (fdwReason == DLL_PROCESS_ATTACH)
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{
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g_RehldsRuntimeConfig.parseFromCommandLine(GetCommandLineA());
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#ifdef HOOK_ENGINE
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size_t addr = (size_t)Sys_GetProcAddress(ORIGINAL_ENGINE_DLL_NAME, CREATEINTERFACE_PROCNAME);
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HookModule("hlds.exe", addr);
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g_pOriginalFileSystemModule = Sys_LoadModule(ORIGINAL_FILESYSTEM_DLL_NAME);
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#endif // HOOK_ENGINE
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}
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else if (fdwReason == DLL_PROCESS_DETACH)
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{
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if (g_pOriginalFileSystemModule)
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{
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Sys_UnloadModule(g_pOriginalFileSystemModule);
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g_pOriginalFileSystemModule = NULL;
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g_OriginalFileSystemFactory = NULL;
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g_pOriginalFileSystem = NULL;
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}
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}
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return TRUE;
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}
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#else // _WIN32
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void __attribute__((constructor)) DllMainLoad()
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{
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size_t addr = (size_t)Sys_GetProcAddress(ORIGINAL_ENGINE_DLL_NAME, CREATEINTERFACE_PROCNAME);
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HookModule("hlds.exe", addr);
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g_pOriginalFileSystemModule = Sys_LoadModule(ORIGINAL_FILESYSTEM_DLL_NAME);
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}
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void __attribute__((destructor)) DllMainUnload()
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{
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if (g_pOriginalFileSystemModule)
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{
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Sys_UnloadModule(g_pOriginalFileSystemModule);
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g_pOriginalFileSystemModule = NULL;
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g_OriginalFileSystemFactory = NULL;
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g_pOriginalFileSystem = NULL;
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}
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}
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#endif // _WIN32
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