X-Git-Url: http://git.xonotic.org/?a=blobdiff_plain;f=cvar.c;h=47af3757c643c1dec4835bab2a316a42ffccfea1;hb=a3fb028804e45957f20bb4c435da0efa18971bbb;hp=b77fee3d4490dd1ca5f2f344bad94a5e97afe3a1;hpb=182f5dd46097dc11b3643dc2376b4dd6a4fa42c7;p=xonotic%2Fdarkplaces.git

diff --git a/cvar.c b/cvar.c
index b77fee3d..47af3757 100644
--- a/cvar.c
+++ b/cvar.c
@@ -21,7 +21,10 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 #include "quakedef.h"
 
+char *cvar_dummy_description = "custom cvar";
+
 cvar_t *cvar_vars = NULL;
+cvar_t *cvar_hashtable[65536];
 char *cvar_null_string = "";
 
 /*
@@ -31,10 +34,13 @@ Cvar_FindVar
 */
 cvar_t *Cvar_FindVar (const char *var_name)
 {
+	int hashindex;
 	cvar_t *var;
 
-	for (var = cvar_vars;var;var = var->next)
-		if (!strcasecmp (var_name, var->name))
+	// use hash lookup to minimize search time
+	hashindex = CRC_Block((const unsigned char *)var_name, strlen(var_name));
+	for (var = cvar_hashtable[hashindex];var;var = var->nextonhashchain)
+		if (!strcmp (var_name, var->name))
 			return var;
 
 	return NULL;
@@ -95,6 +101,36 @@ const char *Cvar_VariableString (const char *var_name)
 	return var->string;
 }
 
+/*
+============
+Cvar_VariableDefString
+============
+*/
+const char *Cvar_VariableDefString (const char *var_name)
+{
+	cvar_t *var;
+
+	var = Cvar_FindVar (var_name);
+	if (!var)
+		return cvar_null_string;
+	return var->defstring;
+}
+
+/*
+============
+Cvar_VariableDescription
+============
+*/
+const char *Cvar_VariableDescription (const char *var_name)
+{
+	cvar_t *var;
+
+	var = Cvar_FindVar (var_name);
+	if (!var)
+		return cvar_null_string;
+	return var->description;
+}
+
 
 /*
 ============
@@ -104,7 +140,7 @@ Cvar_CompleteVariable
 const char *Cvar_CompleteVariable (const char *partial)
 {
 	cvar_t		*cvar;
-	int			len;
+	size_t		len;
 
 	len = strlen(partial);
 
@@ -131,7 +167,7 @@ const char *Cvar_CompleteVariable (const char *partial)
 int Cvar_CompleteCountPossible (const char *partial)
 {
 	cvar_t	*cvar;
-	int		len;
+	size_t	len;
 	int		h;
 
 	h = 0;
@@ -160,13 +196,13 @@ int Cvar_CompleteCountPossible (const char *partial)
 const char **Cvar_CompleteBuildList (const char *partial)
 {
 	const cvar_t *cvar;
-	int len = 0;
-	int bpos = 0;
-	int sizeofbuf = (Cvar_CompleteCountPossible (partial) + 1) * sizeof (const char *);
+	size_t len = 0;
+	size_t bpos = 0;
+	size_t sizeofbuf = (Cvar_CompleteCountPossible (partial) + 1) * sizeof (const char *);
 	const char **buf;
 
 	len = strlen(partial);
-	buf = Mem_Alloc(tempmempool, sizeofbuf + sizeof (const char *));
+	buf = (const char **)Mem_Alloc(tempmempool, sizeofbuf + sizeof (const char *));
 	// Loop through the alias list and print all matches
 	for (cvar = cvar_vars; cvar; cvar = cvar->next)
 		if (!strncasecmp(partial, cvar->name, len))
@@ -176,6 +212,18 @@ const char **Cvar_CompleteBuildList (const char *partial)
 	return buf;
 }
 
+// written by LordHavoc
+void Cvar_CompleteCvarPrint (const char *partial)
+{
+	cvar_t *cvar;
+	size_t len = strlen(partial);
+	// Loop through the command list and print all matches
+	for (cvar = cvar_vars; cvar; cvar = cvar->next)
+		if (!strncasecmp(partial, cvar->name, len))
+			Con_Printf ("^3%s^7 is \"%s\" [\"%s\"] %s\n", cvar->name, cvar->string, cvar->defstring, cvar->description);
+}
+
+
 /*
 ============
 Cvar_Set
@@ -184,24 +232,79 @@ Cvar_Set
 void Cvar_SetQuick_Internal (cvar_t *var, const char *value)
 {
 	qboolean changed;
+	size_t valuelen;
 
-	changed = strcmp(var->string, value);
+	changed = strcmp(var->string, value) != 0;
 	// LordHavoc: don't reallocate when there is no change
 	if (!changed)
 		return;
 
 	// LordHavoc: don't reallocate when the buffer is the same size
-	if (!var->string || strlen(var->string) != strlen(value))
+	valuelen = strlen(value);
+	if (!var->string || strlen(var->string) != valuelen)
 	{
 		Z_Free (var->string);	// free the old value string
 
-		var->string = Z_Malloc (strlen(value)+1);
+		var->string = (char *)Z_Malloc (valuelen + 1);
 	}
-	strcpy (var->string, value);
+	memcpy (var->string, value, valuelen + 1);
 	var->value = atof (var->string);
 	var->integer = (int) var->value;
 	if ((var->flags & CVAR_NOTIFY) && changed && sv.active)
 		SV_BroadcastPrintf("\"%s\" changed to \"%s\"\n", var->name, var->string);
+#if 0
+	// TODO: add infostring support to the server?
+	if ((var->flags & CVAR_SERVERINFO) && changed && sv.active)
+	{
+		InfoString_SetValue(svs.serverinfo, sizeof(svs.serverinfo), var->name, var->string);
+		if (sv.active)
+		{
+			MSG_WriteByte (&sv.reliable_datagram, svc_serverinfostring);
+			MSG_WriteString (&sv.reliable_datagram, var->name);
+			MSG_WriteString (&sv.reliable_datagram, var->string);
+		}
+	}
+#endif
+	if ((var->flags & CVAR_USERINFO) && cls.state != ca_dedicated)
+		CL_SetInfo(var->name, var->string, true, false, false, false);
+	else if ((var->flags & CVAR_NQUSERINFOHACK) && cls.state != ca_dedicated)
+	{
+		// update the cls.userinfo to have proper values for the
+		// silly nq config variables.
+		//
+		// this is done when these variables are changed rather than at
+		// connect time because if the user or code checks the userinfo and it
+		// holds weird values it may cause confusion...
+		if (!strcmp(var->name, "_cl_color"))
+		{
+			int top = (var->integer >> 4) & 15, bottom = var->integer & 15;
+			CL_SetInfo("topcolor", va("%i", top), true, false, false, false);
+			CL_SetInfo("bottomcolor", va("%i", bottom), true, false, false, false);
+			if (cls.protocol != PROTOCOL_QUAKEWORLD && cls.netcon)
+			{
+				MSG_WriteByte(&cls.netcon->message, clc_stringcmd);
+				MSG_WriteString(&cls.netcon->message, va("color %i %i", top, bottom));
+			}
+		}
+		else if (!strcmp(var->name, "_cl_rate"))
+			CL_SetInfo("rate", va("%i", var->integer), true, false, false, false);
+		else if (!strcmp(var->name, "_cl_playerskin"))
+			CL_SetInfo("playerskin", var->string, true, false, false, false);
+		else if (!strcmp(var->name, "_cl_playermodel"))
+			CL_SetInfo("playermodel", var->string, true, false, false, false);
+		else if (!strcmp(var->name, "_cl_name"))
+			CL_SetInfo("name", var->string, true, false, false, false);
+		else if (!strcmp(var->name, "rcon_secure"))
+		{
+			// whenever rcon_secure is changed to 0, clear rcon_password for
+			// security reasons (prevents a send-rcon-password-as-plaintext
+			// attack based on NQ protocol session takeover and svc_stufftext)
+			if(var->integer <= 0)
+				Cvar_Set("rcon_password", "");
+		}
+		else if (!strcmp(var->name, "net_slist_favorites"))
+			NetConn_UpdateFavorites();
+	}
 }
 
 void Cvar_SetQuick (cvar_t *var, const char *value)
@@ -212,8 +315,8 @@ void Cvar_SetQuick (cvar_t *var, const char *value)
 		return;
 	}
 
-	if (developer.integer)
-		Con_Printf("Cvar_SetQuick({\"%s\", \"%s\", %i}, \"%s\");\n", var->name, var->string, var->flags, value);
+	if (developer.integer >= 100)
+		Con_Printf("Cvar_SetQuick({\"%s\", \"%s\", %i, \"%s\"}, \"%s\");\n", var->name, var->string, var->flags, var->defstring, value);
 
 	Cvar_SetQuick_Internal(var, value);
 }
@@ -237,23 +340,23 @@ Cvar_SetValue
 */
 void Cvar_SetValueQuick(cvar_t *var, float value)
 {
-	char val[256];
+	char val[MAX_INPUTLINE];
 
 	if ((float)((int)value) == value)
-		sprintf(val, "%i", (int)value);
+		dpsnprintf(val, sizeof(val), "%i", (int)value);
 	else
-		sprintf(val, "%f", value);
+		dpsnprintf(val, sizeof(val), "%f", value);
 	Cvar_SetQuick(var, val);
 }
 
 void Cvar_SetValue(const char *var_name, float value)
 {
-	char val[256];
+	char val[MAX_INPUTLINE];
 
 	if ((float)((int)value) == value)
-		sprintf(val, "%i", (int)value);
+		dpsnprintf(val, sizeof(val), "%i", (int)value);
 	else
-		sprintf(val, "%f", value);
+		dpsnprintf(val, sizeof(val), "%f", value);
 	Cvar_Set(var_name, val);
 }
 
@@ -266,10 +369,12 @@ Adds a freestanding variable to the variable list.
 */
 void Cvar_RegisterVariable (cvar_t *variable)
 {
-	cvar_t *cvar, *cvar2;
+	int hashindex;
+	cvar_t *current, *next, *cvar;
 	char *oldstr;
+	size_t alloclen;
 
-	if (developer.integer)
+	if (developer.integer >= 100)
 		Con_Printf("Cvar_RegisterVariable({\"%s\", \"%s\", %i});\n", variable->name, variable->string, variable->flags);
 
 // first check to see if it has already been defined
@@ -278,8 +383,8 @@ void Cvar_RegisterVariable (cvar_t *variable)
 	{
 		if (cvar->flags & CVAR_ALLOCATED)
 		{
-			if (developer.integer)
-				Con_Printf("...  replacing existing allocated cvar {\"%s\", \"%s\", %i}", cvar->name, cvar->string, cvar->flags);
+			if (developer.integer >= 100)
+				Con_Printf("...  replacing existing allocated cvar {\"%s\", \"%s\", %i}\n", cvar->name, cvar->string, cvar->flags);
 			// fixed variables replace allocated ones
 			// (because the engine directly accesses fixed variables)
 			// NOTE: this isn't actually used currently
@@ -287,6 +392,7 @@ void Cvar_RegisterVariable (cvar_t *variable)
 			variable->flags |= (cvar->flags & ~CVAR_ALLOCATED);
 			// cvar->string is now owned by variable instead
 			variable->string = cvar->string;
+			variable->defstring = cvar->defstring;
 			variable->value = atof (variable->string);
 			variable->integer = (int) variable->value;
 			// replace cvar with this one...
@@ -299,13 +405,13 @@ void Cvar_RegisterVariable (cvar_t *variable)
 			else
 			{
 				// otherwise find it somewhere in the list
-				for (cvar2 = cvar_vars;cvar2->next != cvar;cvar2 = cvar2->next);
-				if (cvar2->next == cvar)
-					cvar2->next = variable;
+				for (current = cvar_vars;current->next != cvar;current = current->next)
+					;
+				current->next = variable;
 			}
 
 			// get rid of old allocated cvar
-			// (but not the cvar->string, because we kept that)
+			// (but not cvar->string and cvar->defstring, because we kept those)
 			Z_Free(cvar->name);
 			Z_Free(cvar);
 		}
@@ -323,21 +429,29 @@ void Cvar_RegisterVariable (cvar_t *variable)
 
 // copy the value off, because future sets will Z_Free it
 	oldstr = variable->string;
-	variable->string = Z_Malloc (strlen(variable->string)+1);
-	strcpy (variable->string, oldstr);
+	alloclen = strlen(variable->string) + 1;
+	variable->string = (char *)Z_Malloc (alloclen);
+	memcpy (variable->string, oldstr, alloclen);
+	variable->defstring = (char *)Z_Malloc (alloclen);
+	memcpy (variable->defstring, oldstr, alloclen);
 	variable->value = atof (variable->string);
 	variable->integer = (int) variable->value;
 
 // link the variable in
 // alphanumerical order
-	for( cvar = NULL, cvar2 = cvar_vars ; cvar2 && strcmp( cvar2->name, variable->name ) < 0 ; cvar = cvar2, cvar2 = cvar->next )
+	for( current = NULL, next = cvar_vars ; next && strcmp( next->name, variable->name ) < 0 ; current = next, next = next->next )
 		;
-	if( cvar ) {
-		cvar->next = variable;
+	if( current ) {
+		current->next = variable;
 	} else {
 		cvar_vars = variable;
 	}
-	variable->next = cvar2;
+	variable->next = next;
+
+	// link to head of list in this hash table index
+	hashindex = CRC_Block((const unsigned char *)variable->name, strlen(variable->name));
+	variable->nextonhashchain = cvar_hashtable[hashindex];
+	cvar_hashtable[hashindex] = variable;
 }
 
 /*
@@ -347,11 +461,13 @@ Cvar_Get
 Adds a newly allocated variable to the variable list or sets its value.
 ============
 */
-cvar_t *Cvar_Get (const char *name, const char *value, int flags)
+cvar_t *Cvar_Get (const char *name, const char *value, int flags, const char *newdescription)
 {
-	cvar_t *cvar;
+	int hashindex;
+	cvar_t *current, *next, *cvar;
+	size_t alloclen;
 
-	if (developer.integer)
+	if (developer.integer >= 100)
 		Con_Printf("Cvar_Get(\"%s\", \"%s\", %i);\n", name, value, flags);
 
 // first check to see if it has already been defined
@@ -360,6 +476,20 @@ cvar_t *Cvar_Get (const char *name, const char *value, int flags)
 	{
 		cvar->flags |= flags;
 		Cvar_SetQuick_Internal (cvar, value);
+		if(newdescription && (cvar->flags & CVAR_ALLOCATED))
+		{
+			if(cvar->description != cvar_dummy_description)
+				Z_Free(cvar->description);
+
+			if(*newdescription)
+			{
+				alloclen = strlen(newdescription) + 1;
+				cvar->description = (char *)Z_Malloc(alloclen);
+				memcpy(cvar->description, newdescription, alloclen);
+			}
+			else
+				cvar->description = cvar_dummy_description;
+		}
 		return cvar;
 	}
 
@@ -371,19 +501,45 @@ cvar_t *Cvar_Get (const char *name, const char *value, int flags)
 	}
 
 // allocate a new cvar, cvar name, and cvar string
+// TODO: factorize the following code with the one at the end of Cvar_RegisterVariable()
 // FIXME: these never get Z_Free'd
-	cvar = Z_Malloc(sizeof(cvar_t));
+	cvar = (cvar_t *)Z_Malloc(sizeof(cvar_t));
 	cvar->flags = flags | CVAR_ALLOCATED;
-	cvar->name = Z_Malloc(strlen(name)+1);
-	strcpy(cvar->name, name);
-	cvar->string = Z_Malloc(strlen(value)+1);
-	strcpy(cvar->string, value);
+	alloclen = strlen(name) + 1;
+	cvar->name = (char *)Z_Malloc(alloclen);
+	memcpy(cvar->name, name, alloclen);
+	alloclen = strlen(value) + 1;
+	cvar->string = (char *)Z_Malloc(alloclen);
+	memcpy(cvar->string, value, alloclen);
+	cvar->defstring = (char *)Z_Malloc(alloclen);
+	memcpy(cvar->defstring, value, alloclen);
 	cvar->value = atof (cvar->string);
 	cvar->integer = (int) cvar->value;
 
+	if(newdescription && *newdescription)
+	{
+		alloclen = strlen(newdescription) + 1;
+		cvar->description = (char *)Z_Malloc(alloclen);
+		memcpy(cvar->description, newdescription, alloclen);
+	}
+	else
+		cvar->description = cvar_dummy_description; // actually checked by VM_cvar_type
+
 // link the variable in
-	cvar->next = cvar_vars;
-	cvar_vars = cvar;
+// alphanumerical order
+	for( current = NULL, next = cvar_vars ; next && strcmp( next->name, cvar->name ) < 0 ; current = next, next = next->next )
+		;
+	if( current )
+		current->next = cvar;
+	else
+		cvar_vars = cvar;
+	cvar->next = next;
+
+	// link to head of list in this hash table index
+	hashindex = CRC_Block((const unsigned char *)cvar->name, strlen(cvar->name));
+	cvar->nextonhashchain = cvar_hashtable[hashindex];
+	cvar_hashtable[hashindex] = cvar;
+
 	return cvar;
 }
 
@@ -407,12 +563,12 @@ qboolean	Cvar_Command (void)
 // perform a variable print or set
 	if (Cmd_Argc() == 1)
 	{
-		Con_Printf("\"%s\" is \"%s\"\n", v->name, v->string);
+		Con_Printf("\"%s\" is \"%s\" [\"%s\"]\n", v->name, ((v->flags & CVAR_PRIVATE) ? "********"/*hunter2*/ : v->string), v->defstring);
 		return true;
 	}
 
-	if (developer.integer)
-		Con_Print("Cvar_Command: ");
+	if (developer.integer >= 100)
+		Con_DPrint("Cvar_Command: ");
 
 	if (v->flags & CVAR_READONLY)
 	{
@@ -420,10 +576,72 @@ qboolean	Cvar_Command (void)
 		return true;
 	}
 	Cvar_Set (v->name, Cmd_Argv(1));
+	if (developer.integer >= 100)
+		Con_DPrint("\n");
 	return true;
 }
 
 
+void Cvar_UnlockDefaults (void)
+{
+	cvar_t *var;
+	// unlock the default values of all cvars
+	for (var = cvar_vars ; var ; var = var->next)
+		var->flags &= ~CVAR_DEFAULTSET;
+}
+
+
+void Cvar_LockDefaults_f (void)
+{
+	cvar_t *var;
+	// lock in the default values of all cvars
+	for (var = cvar_vars ; var ; var = var->next)
+	{
+		if (!(var->flags & CVAR_DEFAULTSET))
+		{
+			size_t alloclen;
+
+			//Con_Printf("locking cvar %s (%s -> %s)\n", var->name, var->string, var->defstring);
+			var->flags |= CVAR_DEFAULTSET;
+			Z_Free(var->defstring);
+			alloclen = strlen(var->string) + 1;
+			var->defstring = (char *)Z_Malloc(alloclen);
+			memcpy(var->defstring, var->string, alloclen);
+		}
+	}
+}
+
+
+void Cvar_ResetToDefaults_All_f (void)
+{
+	cvar_t *var;
+	// restore the default values of all cvars
+	for (var = cvar_vars ; var ; var = var->next)
+		if((var->flags & CVAR_NORESETTODEFAULTS) == 0)
+			Cvar_SetQuick(var, var->defstring);
+}
+
+
+void Cvar_ResetToDefaults_NoSaveOnly_f (void)
+{
+	cvar_t *var;
+	// restore the default values of all cvars
+	for (var = cvar_vars ; var ; var = var->next)
+		if ((var->flags & (CVAR_NORESETTODEFAULTS | CVAR_SAVE)) == 0)
+			Cvar_SetQuick(var, var->defstring);
+}
+
+
+void Cvar_ResetToDefaults_SaveOnly_f (void)
+{
+	cvar_t *var;
+	// restore the default values of all cvars
+	for (var = cvar_vars ; var ; var = var->next)
+		if ((var->flags & (CVAR_NORESETTODEFAULTS | CVAR_SAVE)) == CVAR_SAVE)
+			Cvar_SetQuick(var, var->defstring);
+}
+
+
 /*
 ============
 Cvar_WriteVariables
@@ -436,8 +654,9 @@ void Cvar_WriteVariables (qfile_t *f)
 {
 	cvar_t	*var;
 
+	// don't save cvars that match their default value
 	for (var = cvar_vars ; var ; var = var->next)
-		if (var->flags & CVAR_SAVE)
+		if ((var->flags & CVAR_SAVE) && (strcmp(var->string, var->defstring) || (var->flags & CVAR_ALLOCATED)))
 			FS_Printf(f, "%s%s \"%s\"\n", var->flags & CVAR_ALLOCATED ? "seta " : "", var->name, var->string);
 }
 
@@ -453,7 +672,9 @@ void Cvar_List_f (void)
 {
 	cvar_t *cvar;
 	const char *partial;
-	int len, count;
+	size_t len;
+	int count;
+	qboolean ispattern;
 
 	if (Cmd_Argc() > 1)
 	{
@@ -466,20 +687,27 @@ void Cvar_List_f (void)
 		len = 0;
 	}
 
+	ispattern = partial && (strchr(partial, '*') || strchr(partial, '?'));
+
 	count = 0;
 	for (cvar = cvar_vars; cvar; cvar = cvar->next)
 	{
-		if (partial && strncasecmp (partial,cvar->name,len))
+		if (len && (ispattern ? !matchpattern_with_separator(cvar->name, partial, false, "", false) : strncmp (partial,cvar->name,len)))
 			continue;
 
-		Con_Printf("%s is \"%s\"\n", cvar->name, cvar->string);
+		Con_Printf("%s is \"%s\" [\"%s\"] %s\n", cvar->name, ((cvar->flags & CVAR_PRIVATE) ? "********"/*hunter2*/ : cvar->string), cvar->defstring, cvar->description);
 		count++;
 	}
 
-	Con_Printf("%i cvar(s)", count);
-	if (partial)
-		Con_Printf(" beginning with \"%s\"", partial);
-	Con_Print("\n");
+	if (len)
+	{
+		if(ispattern)
+			Con_Printf("%i cvar%s matching \"%s\"\n", count, (count > 1) ? "s" : "", partial);
+		else
+			Con_Printf("%i cvar%s beginning with \"%s\"\n", count, (count > 1) ? "s" : "", partial);
+	}
+	else
+		Con_Printf("%i cvar(s)\n", count);
 }
 // 2000-01-09 CvarList command by Maddes
 
@@ -490,7 +718,7 @@ void Cvar_Set_f (void)
 	// make sure it's the right number of parameters
 	if (Cmd_Argc() < 3)
 	{
-		Con_Printf("Set: wrong number of parameters, usage: set <variablename> <value>\n");
+		Con_Printf("Set: wrong number of parameters, usage: set <variablename> <value> [<description>]\n");
 		return;
 	}
 
@@ -502,11 +730,11 @@ void Cvar_Set_f (void)
 		return;
 	}
 
-	if (developer.integer)
-		Con_Print("Set: ");
+	if (developer.integer >= 100)
+		Con_DPrint("Set: ");
 
 	// all looks ok, create/modify the cvar
-	Cvar_Get(Cmd_Argv(1), Cmd_Argv(2), 0);
+	Cvar_Get(Cmd_Argv(1), Cmd_Argv(2), 0, Cmd_Argc() > 3 ? Cmd_Argv(3) : NULL);
 }
 
 void Cvar_SetA_f (void)
@@ -516,7 +744,7 @@ void Cvar_SetA_f (void)
 	// make sure it's the right number of parameters
 	if (Cmd_Argc() < 3)
 	{
-		Con_Printf("SetA: wrong number of parameters, usage: seta <variablename> <value>\n");
+		Con_Printf("SetA: wrong number of parameters, usage: seta <variablename> <value> [<description>]\n");
 		return;
 	}
 
@@ -528,11 +756,46 @@ void Cvar_SetA_f (void)
 		return;
 	}
 
-	if (developer.integer)
-		Con_Print("SetA: ");
+	if (developer.integer >= 100)
+		Con_DPrint("SetA: ");
 
 	// all looks ok, create/modify the cvar
-	Cvar_Get(Cmd_Argv(1), Cmd_Argv(2), CVAR_SAVE);
+	Cvar_Get(Cmd_Argv(1), Cmd_Argv(2), CVAR_SAVE, Cmd_Argc() > 3 ? Cmd_Argv(3) : NULL);
 }
 
-
+#ifdef FILLALLCVARSWITHRUBBISH
+void Cvar_FillAll_f()
+{
+	char *buf, *p, *q;
+	int n, i;
+	cvar_t *var;
+	qboolean verify;
+	if(Cmd_Argc() != 2)
+	{
+		Con_Printf("Usage: %s length to plant rubbish\n", Cmd_Argv(0));
+		Con_Printf("Usage: %s -length to verify that the rubbish is still there\n", Cmd_Argv(0));
+		return;
+	}
+	n = atoi(Cmd_Argv(1));
+	verify = (n < 0);
+	if(verify)
+		n = -n;
+	buf = Z_Malloc(n + 1);
+	buf[n] = 0;
+	for(var = cvar_vars; var; var = var->next)
+	{
+		for(i = 0, p = buf, q = var->name; i < n; ++i)
+		{
+			*p++ = *q++;
+			if(!*q)
+				q = var->name;
+		}
+		if(verify && strcmp(var->string, buf))
+		{
+			Con_Printf("\n%s does not contain the right rubbish, either this is the first run or a possible overrun was detected, or something changed it intentionally; it DOES contain: %s\n", var->name, var->string);
+		}
+		Cvar_SetQuick(var, buf);
+	}
+	Z_Free(buf);
+}
+#endif /* FILLALLCVARSWITHRUBBISH */