ref: 24746fcce9c0733764a9d256884f0bfbe4a808f2
dir: /qcommon/cvar.c/
/*
Copyright (C) 1997-2001 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 <u.h>
#include <libc.h>
#include <stdio.h>
#include "../q_shared.h"
cvar_t *cvar_vars;
/*
============
Cvar_InfoValidate
============
*/
static qboolean Cvar_InfoValidate (char *s)
{
if (strstr (s, "\\"))
return false;
if (strstr (s, "\""))
return false;
if (strstr (s, ";"))
return false;
return true;
}
/*
============
Cvar_FindVar
============
*/
static cvar_t *Cvar_FindVar (char *var_name)
{
cvar_t *var;
for (var=cvar_vars ; var ; var=var->next)
if (!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 atof (var->string);
}
/*
============
Cvar_VariableString
============
*/
char *Cvar_VariableString (char *var_name)
{
cvar_t *var;
var = Cvar_FindVar (var_name);
if (!var)
return "";
return var->string;
}
/*
============
Cvar_CompleteVariable
============
*/
char *Cvar_CompleteVariable (char *partial)
{
cvar_t *cvar;
int len;
len = strlen(partial);
if (!len)
return NULL;
// check exact match
for (cvar=cvar_vars ; cvar ; cvar=cvar->next)
if (!strcmp (partial,cvar->name))
return cvar->name;
// check partial match
for (cvar=cvar_vars ; cvar ; cvar=cvar->next)
if (!strncmp (partial,cvar->name, len))
return cvar->name;
return NULL;
}
/*
============
Cvar_Get
If the variable already exists, the value will not be set
The flags will be or'ed in if the variable exists.
============
*/
cvar_t *Cvar_Get (char *var_name, char *var_value, int flags)
{
cvar_t *var;
if (flags & (CVAR_USERINFO | CVAR_SERVERINFO))
{
if (!Cvar_InfoValidate (var_name))
{
Com_Printf("invalid info cvar name\n");
return NULL;
}
}
var = Cvar_FindVar (var_name);
if (var)
{
var->flags |= flags;
return var;
}
if (!var_value)
return NULL;
if (flags & (CVAR_USERINFO | CVAR_SERVERINFO))
{
if (!Cvar_InfoValidate (var_value))
{
Com_Printf("invalid info cvar value\n");
return NULL;
}
}
var = Z_Malloc (sizeof(*var));
var->name = CopyString (var_name);
var->string = CopyString (var_value);
var->modified = true;
var->value = atof (var->string);
// link the variable in
var->next = cvar_vars;
cvar_vars = var;
var->flags = flags;
return var;
}
/*
============
Cvar_Set2
============
*/
cvar_t *Cvar_Set2 (char *var_name, char *value, qboolean force)
{
cvar_t *var;
var = Cvar_FindVar (var_name);
if (!var)
{ // create it
return Cvar_Get (var_name, value, 0);
}
if (var->flags & (CVAR_USERINFO | CVAR_SERVERINFO))
{
if (!Cvar_InfoValidate (value))
{
Com_Printf("invalid info cvar value\n");
return var;
}
}
if (!force)
{
if (var->flags & CVAR_NOSET)
{
Com_Printf ("%s is write protected.\n", var_name);
return var;
}
if (var->flags & CVAR_LATCH)
{
if (var->latched_string)
{
if (strcmp(value, var->latched_string) == 0)
return var;
Z_Free (var->latched_string);
}
else
{
if (strcmp(value, var->string) == 0)
return var;
}
if (Com_ServerState())
{
Com_Printf ("%s will be changed for next game.\n", var_name);
var->latched_string = CopyString(value);
}
else
{
var->string = CopyString(value);
var->value = atof (var->string);
if (!strcmp(var->name, "game"))
{
FS_SetGamedir (var->string);
FS_ExecAutoexec ();
}
}
return var;
}
}
else
{
if (var->latched_string)
{
Z_Free (var->latched_string);
var->latched_string = NULL;
}
}
if (!strcmp(value, var->string))
return var; // not changed
var->modified = true;
if (var->flags & CVAR_USERINFO)
userinfo_modified = true; // transmit at next oportunity
Z_Free (var->string); // free the old value string
var->string = CopyString(value);
var->value = atof (var->string);
return var;
}
/*
============
Cvar_ForceSet
============
*/
cvar_t *Cvar_ForceSet (char *var_name, char *value)
{
return Cvar_Set2 (var_name, value, true);
}
/*
============
Cvar_Set
============
*/
cvar_t *Cvar_Set (char *var_name, char *value)
{
return Cvar_Set2 (var_name, value, false);
}
/*
============
Cvar_FullSet
============
*/
cvar_t *Cvar_FullSet (char *var_name, char *value, int flags)
{
cvar_t *var;
var = Cvar_FindVar (var_name);
if (!var)
{ // create it
return Cvar_Get (var_name, value, flags);
}
var->modified = true;
if (var->flags & CVAR_USERINFO)
userinfo_modified = true; // transmit at next oportunity
Z_Free (var->string); // free the old value string
var->string = CopyString(value);
var->value = atof (var->string);
var->flags = flags;
return var;
}
/*
============
Cvar_SetValue
============
*/
void Cvar_SetValue (char *var_name, float value)
{
char val[32];
if (value == (int)value)
Com_sprintf (val, sizeof(val), "%i",(int)value);
else
Com_sprintf (val, sizeof(val), "%f",value);
Cvar_Set (var_name, val);
}
/*
============
Cvar_GetLatchedVars
Any variables with latched values will now be updated
============
*/
void Cvar_GetLatchedVars (void)
{
cvar_t *var;
for (var = cvar_vars ; var ; var = var->next)
{
if (!var->latched_string)
continue;
Z_Free (var->string);
var->string = var->latched_string;
var->latched_string = NULL;
var->value = atof(var->string);
if (!strcmp(var->name, "game"))
{
FS_SetGamedir (var->string);
FS_ExecAutoexec ();
}
}
}
/*
============
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)
{
Com_Printf ("\"%s\" is \"%s\"\n", v->name, v->string);
return true;
}
Cvar_Set (v->name, Cmd_Argv(1));
return true;
}
/*
============
Cvar_Set_f
Allows setting and defining of arbitrary cvars from console
============
*/
void Cvar_Set_f (void)
{
int c;
int flags;
c = Cmd_Argc();
if (c != 3 && c != 4)
{
Com_Printf ("usage: set <variable> <value> [u / s]\n");
return;
}
if (c == 4)
{
if (!strcmp(Cmd_Argv(3), "u"))
flags = CVAR_USERINFO;
else if (!strcmp(Cmd_Argv(3), "s"))
flags = CVAR_SERVERINFO;
else
{
Com_Printf ("flags can only be 'u' or 's'\n");
return;
}
Cvar_FullSet (Cmd_Argv(1), Cmd_Argv(2), flags);
}
else
Cvar_Set (Cmd_Argv(1), Cmd_Argv(2));
}
/*
============
Cvar_WriteVariables
Appends lines containing "set variable value" for all variables
with the archive flag set to true.
============
*/
void Cvar_WriteVariables (char *path)
{
cvar_t *var;
char buffer[1024];
FILE *f;
f = fopen (path, "a");
for (var = cvar_vars ; var ; var = var->next)
{
if (var->flags & CVAR_ARCHIVE)
{
Com_sprintf (buffer, sizeof(buffer), "set %s \"%s\"\n", var->name, var->string);
fprintf (f, "%s", buffer);
}
}
fclose (f);
}
/*
============
Cvar_List_f
============
*/
void Cvar_List_f (void)
{
cvar_t *var;
int i;
i = 0;
for (var = cvar_vars ; var ; var = var->next, i++)
{
if (var->flags & CVAR_ARCHIVE)
Com_Printf ("*");
else
Com_Printf (" ");
if (var->flags & CVAR_USERINFO)
Com_Printf ("U");
else
Com_Printf (" ");
if (var->flags & CVAR_SERVERINFO)
Com_Printf ("S");
else
Com_Printf (" ");
if (var->flags & CVAR_NOSET)
Com_Printf ("-");
else if (var->flags & CVAR_LATCH)
Com_Printf ("L");
else
Com_Printf (" ");
Com_Printf (" %s \"%s\"\n", var->name, var->string);
}
Com_Printf ("%i cvars\n", i);
}
qboolean userinfo_modified;
char *Cvar_BitInfo (int bit)
{
static char info[MAX_INFO_STRING];
cvar_t *var;
info[0] = 0;
for (var = cvar_vars ; var ; var = var->next)
{
if (var->flags & bit)
Info_SetValueForKey (info, var->name, var->string);
}
return info;
}
// returns an info string containing all the CVAR_USERINFO cvars
char *Cvar_Userinfo (void)
{
return Cvar_BitInfo (CVAR_USERINFO);
}
// returns an info string containing all the CVAR_SERVERINFO cvars
char *Cvar_Serverinfo (void)
{
return Cvar_BitInfo (CVAR_SERVERINFO);
}
/*
============
Cvar_Init
Reads in all archived cvars
============
*/
void Cvar_Init (void)
{
Cmd_AddCommand ("set", Cvar_Set_f);
Cmd_AddCommand ("cvarlist", Cvar_List_f);
}