142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
//=======================================================================
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// Copyright (C) XashXT Group 2007
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// getlib.c - used for find engine library
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// getting direct path or from environment
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//=======================================================================
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#ifndef GETLIB_H
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#define GETLIB_H
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#define NDEBUG
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#include <sys\types.h>
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#include <windows.h>
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#include <winreg.h>
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#include <stdio.h>
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#pragma comment(lib, "msvcrt")
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#pragma comment(linker,"/MERGE:.rdata=.text")
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#pragma comment(linker,"/FILEALIGN:512 /SECTION:.text, EWRX /IGNORE:4078")
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#define Run32( prog ) return CreateMain32()( #prog )
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//console format
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typedef int (*winmain_t)( char *funcname );
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char szSearch[ 5 ][ 1024 ];
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char szFsPath[ 4096 ];
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HINSTANCE hmain;
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void GetError( const char *errorstring )
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{
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HINSTANCE user32_dll = LoadLibrary( "user32.dll" );
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static int (*pMessageBoxA)(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType);
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if(!errorstring) exit( 0 );
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if( user32_dll ) pMessageBoxA = (void *)GetProcAddress( user32_dll, "MessageBoxA" );
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if(pMessageBoxA) pMessageBoxA( 0, errorstring, "Error", MB_OK );
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if( user32_dll ) FreeLibrary( user32_dll ); // no need anymore...
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exit( 1 );
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}
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BOOL GetBin( void )
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{
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//grab direct path?
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return TRUE;
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}
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BOOL GetEnv( void )
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{
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char *pEnvPath = getenv("Xash3D");
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if(!pEnvPath) return FALSE;
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strcpy(szFsPath, pEnvPath );
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return TRUE;
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}
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BOOL GetReg( void )
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{
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HINSTANCE advapi32_dll = LoadLibrary( "advapi32.dll" );
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static long(_stdcall *pRegOpenKeyEx)(HKEY,LPCSTR,DWORD,REGSAM,PHKEY);
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static long(_stdcall *pRegQueryValueEx)(HKEY,LPCSTR,LPDWORD,LPDWORD,LPBYTE,LPDWORD);
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static long(_stdcall *pRegCloseKey)(HKEY);
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DWORD dwBufLen = 4096; // max env length
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HKEY hKey;
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long lRet;
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if(advapi32_dll)
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{
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pRegCloseKey = (void *)GetProcAddress( advapi32_dll, "RegCloseKey" );
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pRegOpenKeyEx = (void *)GetProcAddress( advapi32_dll, "RegOpenKeyExA" );
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pRegQueryValueEx = (void *)GetProcAddress( advapi32_dll, "RegQueryValueExA" );
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}
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else goto failure;
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if(pRegCloseKey && pRegOpenKeyEx && pRegQueryValueEx)
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{
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lRet = pRegOpenKeyEx( HKEY_LOCAL_MACHINE, "System\\CurrentControlSet\\Control\\Session Manager\\Environment", 0, KEY_READ, &hKey);
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if(lRet != ERROR_SUCCESS) goto failure;
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lRet = pRegQueryValueEx( hKey, "Xash3D", NULL, NULL, (byte *)szFsPath, &dwBufLen);
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if(lRet != ERROR_SUCCESS) goto failure;
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pRegCloseKey( hKey );
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}
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else goto failure;
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return TRUE;
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failure:
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if( advapi32_dll ) FreeLibrary( advapi32_dll ); //don't forget freeing
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return FALSE;
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}
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void GetLibrary ( void )
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{
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int i, count = 0;
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if(GetEnv()) //get environment
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{
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sprintf( szSearch[count], "%s\\bin\\launcher.dll", szFsPath );
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count++;
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}
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if(GetReg()) //get registry
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{
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sprintf( szSearch[count], "%s\\bin\\launcher.dll", szFsPath );
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count++;
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}
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if(GetBin()) //get direct
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{
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strcpy( szSearch[count], "bin\\launcher.dll" );
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count++;
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}
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if(GetBin()) //get direct
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{
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strcpy( szSearch[count], "launcher.dll" );
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count++;
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}
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for(i = 0; i < count; i++) { if(hmain = LoadLibrary( szSearch[i])) break; }
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}
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winmain_t CreateMain32( void )
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{
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winmain_t main;
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GetLibrary();
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if (hmain)
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{
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main = (winmain_t)GetProcAddress( hmain, "CreateAPI" );
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if(!main) GetError("Unable to load the launcher.dll" );
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return main;
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}
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GetError("Unable to load the launcher.dll" );
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return 0; //make compiller happy
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}
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#endif//GETLIB_H
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