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/*
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// cvar.c -- dynamic variable tracking
#include "quakedef.h"
cvar_t *cvar_vars;
char *cvar_null_string = "";
/*
============
Cvar_FindVar
============
*/
cvar_t *Cvar_FindVar (char *var_name)
{
cvar_t *var;
for (var=cvar_vars ; var ; var=var->next)
if (!Q_strcmp (var_name, var->name))
return var;
return NULL;
}
/*
============
Cvar_VariableValue
============
*/
float Cvar_VariableValue (char *var_name)
{
cvar_t *var;
var = Cvar_FindVar (var_name);
if (!var)
return 0;
return Q_atof (var->string);
}
/*
============
Cvar_VariableString
============
*/
char *Cvar_VariableString (char *var_name)
{
cvar_t *var;
var = Cvar_FindVar (var_name);
if (!var)
return cvar_null_string;
return var->string;
}
/*
============
Cvar_CompleteVariable
============
*/
char *Cvar_CompleteVariable (char *partial)
{
cvar_t *cvar;
int len;
len = Q_strlen(partial);
if (!len)
return NULL;
// check functions
for (cvar=cvar_vars ; cvar ; cvar=cvar->next)
if (!Q_strncmp (partial,cvar->name, len))
return cvar->name;
return NULL;
}
/*
============
Cvar_Set
============
*/
void Cvar_Set (char *var_name, char *value)
{
cvar_t *var;
qboolean changed;
var = Cvar_FindVar (var_name);
if (!var)
{ // there is an error in C code if this happens
Con_Printf ("Cvar_Set: variable %s not found\n", var_name);
return;
}
changed = Q_strcmp(var->string, value);
Z_Free (var->string); // free the old value string
var->string = Z_Malloc (Q_strlen(value)+1);
Q_strcpy (var->string, value);
var->value = Q_atof (var->string);
if (var->server && changed)
{
if (sv.active)
SV_BroadcastPrintf ("\"%s\" changed to \"%s\"\n", var->name, var->string);
}
}
/*
============
Cvar_SetValue
============
*/
void Cvar_SetValue (char *var_name, float value)
{
char val[32];
sprintf (val, "%f",value);
Cvar_Set (var_name, val);
}
/*
============
Cvar_RegisterVariable
Adds a freestanding variable to the variable list.
============
*/
void Cvar_RegisterVariable (cvar_t *variable)
{
char *oldstr;
// first check to see if it has allready been defined
if (Cvar_FindVar (variable->name))
{
Con_Printf ("Can't register variable %s, allready defined\n", variable->name);
return;
}
// check for overlap with a command
if (Cmd_Exists (variable->name))
{
Con_Printf ("Cvar_RegisterVariable: %s is a command\n", variable->name);
return;
}
// copy the value off, because future sets will Z_Free it
oldstr = variable->string;
variable->string = Z_Malloc (Q_strlen(variable->string)+1);
Q_strcpy (variable->string, oldstr);
variable->value = Q_atof (variable->string);
// link the variable in
variable->next = cvar_vars;
cvar_vars = variable;
}
/*
============
Cvar_Command
Handles variable inspection and changing from the console
============
*/
qboolean Cvar_Command (void)
{
cvar_t *v;
// check variables
v = Cvar_FindVar (Cmd_Argv(0));
if (!v)
return false;
// perform a variable print or set
if (Cmd_Argc() == 1)
{
Con_Printf ("\"%s\" is \"%s\"\n", v->name, v->string);
return true;
}
Cvar_Set (v->name, Cmd_Argv(1));
return true;
}
/*
============
Cvar_WriteVariables
Writes lines containing "set variable value" for all variables
with the archive flag set to true.
============
*/
void Cvar_WriteVariables (FILE *f)
{
cvar_t *var;
for (var = cvar_vars ; var ; var = var->next)
if (var->archive)
fprintf (f, "%s \"%s\"\n", var->name, var->string);
}
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