newtree/source/cvar.c

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/*
cvar.c
dynamic variable tracking
Copyright (C) 1996-1997 Id Software, Inc.
Copyright (C) 1999,2000 Nelson Rush.
Copyright (C) 1999,2000 contributors of the QuakeForge project
Please see the file "AUTHORS" for a list of contributors
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
$Id$
*/
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "commdef.h"
#include "cvar.h"
#include "zone.h"
#include "console.h"
#include "qargs.h"
#include "cmd.h"
#include "commdef.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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cvar_t *cvar_vars;
char *cvar_null_string = "";
cvar_t *developer;
cvar_alias_t *calias_vars;
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/*
============
Cvar_FindVar
============
*/
cvar_t *Cvar_FindVar (char *var_name)
{
cvar_t *var;
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for (var=cvar_vars ; var ; var=var->next)
if (!strcmp (var_name, var->name))
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return var;
return NULL;
}
cvar_t *Cvar_FindAlias (char *alias_name)
{
cvar_alias_t *alias;
for (alias = calias_vars ; alias ; alias=alias->next)
if (!strcmp (alias_name, alias->name))
return alias->cvar;
return NULL;
}
void Cvar_Alias_Get (char *name, cvar_t *cvar)
{
cvar_alias_t *alias;
cvar_t *var;
if (Cmd_Exists (name))
{
Con_Printf ("CAlias_Get: %s is a command\n", name);
return;
}
if (Cvar_FindVar(name))
{
Con_Printf ("CAlias_Get: tried to alias used cvar name %s\n",name);
return;
}
var = Cvar_FindAlias(name);
if (!var)
{
alias = (cvar_alias_t *) malloc(sizeof(cvar_alias_t));
alias->next = calias_vars;
calias_vars = alias;
alias->name = strdup(name);
alias->cvar = cvar;
}
}
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/*
============
Cvar_VariableValue
============
*/
float Cvar_VariableValue (char *var_name)
{
cvar_t *var;
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var = Cvar_FindVar (var_name);
if (!var)
var = Cvar_FindAlias(var_name);
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if (!var)
return 0;
return atof (var->string);
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}
/*
============
Cvar_VariableString
============
*/
char *Cvar_VariableString (char *var_name)
{
cvar_t *var;
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var = Cvar_FindVar (var_name);
if (!var)
var = Cvar_FindAlias(var_name);
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if (!var)
return cvar_null_string;
return var->string;
}
/*
============
Cvar_CompleteVariable
============
*/
char *Cvar_CompleteVariable (char *partial)
{
cvar_t *cvar;
cvar_alias_t *alias;
int len;
len = strlen(partial);
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if (!len)
return NULL;
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// check exact match
for (cvar=cvar_vars ; cvar ; cvar=cvar->next)
if (!strcmp (partial,cvar->name))
return cvar->name;
// check aliases too :)
for (alias=calias_vars ; alias ; alias=alias->next)
if (!strcmp (partial, alias->name))
return alias->name;
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// check partial match
for (cvar=cvar_vars ; cvar ; cvar=cvar->next)
if (!strncmp (partial,cvar->name, len))
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return cvar->name;
// check aliases too :)
for (alias=calias_vars ; alias ; alias=alias->next)
if (!strncmp (partial, alias->name, len))
return alias->name;
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return NULL;
}
void Cvar_Info (cvar_t *var);
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/*
============
Cvar_Set
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============
*/
void Cvar_Set (cvar_t *var, char *value)
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{
if (!var)
return;
if(var->flags&CVAR_ROM)
return;
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Z_Free (var->string); // free the old value string
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var->string = Z_Malloc (strlen(value)+1);
strcpy (var->string, value);
var->value = atof (var->string);
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Cvar_Info(var);
}
/*
Cvar_SetROM
doesn't check for CVAR_ROM flag
*/
void Cvar_SetROM (cvar_t *var, char *value)
{
if (!var)
return;
Z_Free (var->string); // free the old value string
var->string = Z_Malloc (strlen(value)+1);
strcpy (var->string, value);
var->value = atof (var->string);
Cvar_Info(var);
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}
/*
============
Cvar_SetValue
============
*/
void Cvar_SetValue (cvar_t *var_name, float value)
{
Cvar_Set (var_name, va("%f", value));
}
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/*
============
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)
v = Cvar_FindAlias (Cmd_Argv(0));
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if (!v)
return false;
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// 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, Cmd_Argv(1));
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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)
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{
cvar_t *var;
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for (var = cvar_vars ; var ; var = var->next)
if (var->flags&CVAR_ARCHIVE)
fprintf (f, "%s \"%s\"\n", var->name, var->string);
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}
void Cvar_Set_f(void)
{
cvar_t *var;
char *value;
char *var_name;
if (Cmd_Argc() != 3)
{
Con_Printf ("usage: set <cvar> <value>\n");
return;
}
var_name = Cmd_Argv (1);
value = Cmd_Argv (2);
var = Cvar_FindVar (var_name);
if (!var)
var = Cvar_FindAlias (var_name);
if (var)
{
Cvar_Set (var, value);
}
else
{
var = Cvar_Get (var_name, value, CVAR_USER_CREATED|CVAR_HEAP,
"User created cvar");
}
}
void Cvar_Setrom_f(void)
{
cvar_t *var;
char *value;
char *var_name;
if (Cmd_Argc() != 2)
{
Con_Printf ("usage: setrom <cvar>\n");
return;
}
var_name = Cmd_Argv (1);
value = Cmd_Argv (2);
var = Cvar_FindVar (var_name);
if (!var)
var = Cvar_FindAlias (var_name);
if (var)
{
var->flags |= CVAR_ROM;
}
else
{
Con_Printf ("cvar %s not found\n", var_name);
}
}
void Cvar_Toggle_f (void)
{
cvar_t *var;
if (Cmd_Argc() != 2)
{
Con_Printf ("toggle <cvar> : toggle a cvar on/off\n");
return;
}
var = Cvar_FindVar (Cmd_Argv(1));
if (!var)
var = Cvar_FindAlias(Cmd_Argv(1));
if (!var)
{
Con_Printf ("Unknown variable \"%s\"\n", Cmd_Argv(1));
return;
}
Cvar_Set (var, var->value ? "0" : "1");
}
void Cvar_Help_f (void)
{
char *var_name;
cvar_t *var;
if (Cmd_Argc() != 2)
{
Con_Printf ("usage: help <cvar>\n");
return;
}
var_name = Cmd_Argv (1);
var = Cvar_FindVar (var_name);
if (!var)
var = Cvar_FindAlias (var_name);
if (var)
{
Con_Printf ("%s\n",var->description);
return;
}
Con_Printf ("variable not found\n");
}
void Cvar_CvarList_f (void)
{
cvar_t *var;
int i;
for (var=cvar_vars, i=0 ; var ; var=var->next, i++)
{
Con_Printf("%s\n",var->name);
}
Con_Printf ("------------\n%d variables\n", i);
}
void Cvar_Init()
{
developer = Cvar_Get ("developer","0",0,"None");
Cmd_AddCommand ("set", Cvar_Set_f);
Cmd_AddCommand ("setrom", Cvar_Setrom_f);
Cmd_AddCommand ("toggle", Cvar_Toggle_f);
Cmd_AddCommand ("help",Cvar_Help_f);
Cmd_AddCommand ("cvarlist",Cvar_CvarList_f);
}
void Cvar_Shutdown (void)
{
cvar_t *var,*next;
cvar_alias_t *alias,*nextalias;
// Free cvars
var = cvar_vars;
while(var)
{
next = var->next;
free(var->description);
Z_Free(var->string);
free(var->name);
free(var);
var = next;
}
// Free aliases
alias = calias_vars;
while(alias)
{
nextalias = alias->next;
free(alias->name);
free(alias);
alias = nextalias;
}
}
cvar_t *Cvar_Get(char *name, char *string, int cvarflags, char *description)
{
cvar_t *v;
if (Cmd_Exists (name))
{
Con_Printf ("Cvar_Get: %s is a command\n",name);
return NULL;
}
v = Cvar_FindVar(name);
if (!v)
{
v = (cvar_t *) malloc(sizeof(cvar_t));
// Cvar doesn't exist, so we create it
v->next = cvar_vars;
cvar_vars = v;
v->name = strdup(name);
v->string = Z_Malloc (strlen(string)+1);
strcpy (v->string, string);
v->flags = cvarflags;
v->description = strdup(description);
v->value = atof (v->string);
return v;
}
// Cvar does exist, so we update the flags and return.
v->flags ^= CVAR_USER_CREATED;
v->flags ^= CVAR_HEAP;
v->flags |= cvarflags;
if (!strcmp (v->description,"User created cvar"))
{
// Set with the real description
free(v->description);
v->description = strdup (description);
}
return v;
}