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tier2/vconfig.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Utilities for setting vproject settings
+//
+//===========================================================================//
+
+#ifdef _WIN32
+#if !defined( _X360 )
+#include <windows.h>
+#endif
+#include <direct.h>
+#include <io.h> // _chmod
+#include <process.h>
+#endif
+#if defined( _X360 )
+#include "xbox/xbox_win32stubs.h"
+#endif
+#include "vconfig.h"
+
+
+#ifdef _WIN32
+//-----------------------------------------------------------------------------
+// Purpose: Returns the string value of a registry key
+// Input  : *pName - name of the subKey to read
+//			*pReturn - string buffer to receive read string
+//			size - size of specified buffer
+//-----------------------------------------------------------------------------
+bool GetVConfigRegistrySetting( const char *pName, char *pReturn, int size )
+{
+	// Open the key
+	HKEY hregkey; 
+	// Changed to HKEY_CURRENT_USER from HKEY_LOCAL_MACHINE
+	if ( RegOpenKeyEx( HKEY_CURRENT_USER, VPROJECT_REG_KEY, 0, KEY_QUERY_VALUE, &hregkey ) != ERROR_SUCCESS )
+		return false;
+	
+	// Get the value
+	DWORD dwSize = size;
+	if ( RegQueryValueEx( hregkey, pName, NULL, NULL,(LPBYTE) pReturn, &dwSize ) != ERROR_SUCCESS )
+		return false;
+	
+	// Close the key
+	RegCloseKey( hregkey );
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Sends a global system message to alert programs to a changed environment variable
+//-----------------------------------------------------------------------------
+void NotifyVConfigRegistrySettingChanged( void )
+{
+	DWORD_PTR dwReturnValue = 0;
+	
+	// Propagate changes so that environment variables takes immediate effect!
+	SendMessageTimeout( HWND_BROADCAST, WM_SETTINGCHANGE, 0, (LPARAM) "Environment", SMTO_ABORTIFHUNG, 5000, &dwReturnValue );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Set the registry entry to a string value, under the given subKey
+// Input  : *pName - name of the subKey to set
+//			*pValue - string value
+//-----------------------------------------------------------------------------
+void SetVConfigRegistrySetting( const char *pName, const char *pValue, bool bNotify )
+{
+	HKEY hregkey; 
+
+	// Changed to HKEY_CURRENT_USER from HKEY_LOCAL_MACHINE
+	// Open the key
+	if ( RegCreateKeyEx( 
+		HKEY_CURRENT_USER,		// base key
+		VPROJECT_REG_KEY,		// subkey
+		0,						// reserved
+		0,						// lpClass
+		0,						// options
+		(REGSAM)KEY_ALL_ACCESS,	// access desired
+		NULL,					// security attributes
+		&hregkey,				// result
+		NULL					// tells if it created the key or not (which we don't care)
+		) != ERROR_SUCCESS )
+	{
+		return;
+	}
+	
+	// Set the value to the string passed in
+	int nType = strchr( pValue, '%' ) ? REG_EXPAND_SZ : REG_SZ;
+	RegSetValueEx( hregkey, pName, 0, nType, (const unsigned char *)pValue, (int) strlen(pValue) );
+
+	// Notify other programs
+	if ( bNotify )
+	{
+		NotifyVConfigRegistrySettingChanged();
+	}
+	
+	// Close the key
+	RegCloseKey( hregkey );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Removes the obsolete user keyvalue
+// Input  : *pName - name of the subKey to set
+//			*pValue - string value
+//-----------------------------------------------------------------------------
+bool RemoveObsoleteVConfigRegistrySetting( const char *pValueName, char *pOldValue, int size )
+{
+	// Open the key
+	HKEY hregkey; 
+	if ( RegOpenKeyEx( HKEY_CURRENT_USER, "Environment", 0, (REGSAM)KEY_ALL_ACCESS, &hregkey ) != ERROR_SUCCESS )
+		return false;
+
+	// Return the old state if they've requested it
+	if ( pOldValue != NULL )
+	{
+		DWORD dwSize = size;
+
+		// Get the value
+		if ( RegQueryValueEx( hregkey, pValueName, NULL, NULL,(LPBYTE) pOldValue, &dwSize ) != ERROR_SUCCESS )
+			return false;
+	}
+	
+	// Remove the value
+	if ( RegDeleteValue( hregkey, pValueName ) != ERROR_SUCCESS )
+		return false;
+
+	// Close the key
+	RegCloseKey( hregkey );
+
+	// Notify other programs
+	NotifyVConfigRegistrySettingChanged();
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Take a user-defined environment variable and swap it out for the internally used one
+//-----------------------------------------------------------------------------
+
+bool ConvertObsoleteVConfigRegistrySetting( const char *pValueName )
+{
+	char szValue[MAX_PATH];
+	if ( RemoveObsoleteVConfigRegistrySetting( pValueName, szValue, sizeof( szValue ) ) )
+	{
+		// Set it up the correct way
+		SetVConfigRegistrySetting( pValueName, szValue );
+		return true;
+	}
+
+	return false;
+}
+#endif