ref: 61e35a208c16f339e39e5b4d6244e12ddcc980f7
dir: /cvar.c/
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include "dat.h"
#include "fns.h"
/* Dynamic variable tracking
*
* cvar_t variables are used to hold scalar or string variables that can be
* changed or displayed at the console or prog code as well as accessed
* directly in C code. The user can access cvars from the console in three ways:
* r_draworder prints the current value
* r_draworder 0 sets the current value to 0
* set r_draworder 0 as above, but creates the cvar if not present
* Cvars are restricted from having the same names as commands to keep this
* interface from being ambiguous. */
cvar_t *cvar_vars;
/* if set, each time a CVAR_USERINFO var is changed, the client will send it
* to the server */
qboolean userinfo_modified;
static qboolean
Cvar_InfoValidate(char *s)
{
if(strstr(s, "\\"))
return false;
if(strstr(s, "\""))
return false;
if(strstr(s, ";"))
return false;
return true;
}
static cvar_t *
Cvar_FindVar(char *name)
{
cvar_t *p;
for(p = cvar_vars; p != nil; p = p->next)
if(!strcmp(name, p->name))
return p;
return nil;
}
float
Cvar_VariableValue(char *name)
{
cvar_t *p;
if((p = Cvar_FindVar(name)) == nil)
return 0;
return atof(p->string);
}
char *
Cvar_VariableString(char *name)
{
cvar_t *p;
if((p = Cvar_FindVar(name)) == nil)
return "";
return p->string;
}
char *
Cvar_CompleteVariable(char *partial)
{
cvar_t *p;
int len;
len = strlen(partial);
if(!len)
return nil;
/* check exact match */
for(p = cvar_vars; p != nil; p = p->next)
if(!strcmp(partial, p->name))
return p->name;
/* check partial match */
for(p = cvar_vars; p != nil; p = p->next)
if(!strncmp(partial, p->name, len))
return p->name;
return nil;
}
/* 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 *p;
if(flags & (CVAR_USERINFO|CVAR_SERVERINFO)){
if(!Cvar_InfoValidate(var_name)){
Com_Printf("invalid info cvar name\n");
return nil;
}
}
if((p = Cvar_FindVar(var_name)) != nil){
p->flags |= flags;
return p;
}
if(!var_value)
return nil;
if(flags & (CVAR_USERINFO|CVAR_SERVERINFO)){
if(!Cvar_InfoValidate(var_value)){
Com_Printf("invalid info cvar value\n");
return nil;
}
}
p = Z_Malloc(sizeof(*p));
p->name = CopyString(var_name);
p->string = CopyString(var_value);
p->modified = true;
p->value = atof(p->string);
p->next = cvar_vars;
cvar_vars = p;
p->flags = flags;
return p;
}
cvar_t *
Cvar_Set2(char *var_name, char *value, qboolean force)
{
cvar_t *var;
var = Cvar_FindVar(var_name);
if(!var)
return Cvar_Get(var_name, value, 0); // create it
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))
return var;
Z_Free(var->latched_string);
}else if(!strcmp(value, var->string))
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 = nil;
}
}
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;
}
/* set the variable even if NOSET or LATCH */
cvar_t *
Cvar_ForceSet(char *var_name, char *value)
{
return Cvar_Set2(var_name, value, true);
}
cvar_t *
Cvar_Set(char *var_name, char *value)
{
return Cvar_Set2(var_name, value, false);
}
cvar_t *
Cvar_FullSet(char *var_name, char *value, int flags)
{
cvar_t *var;
var = Cvar_FindVar(var_name);
if(!var)
return Cvar_Get(var_name, value, flags); // create it
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;
}
void
Cvar_SetValue(char *var_name, float value)
{
char val[32];
if(value == (int)value)
Com_sprintf(val, sizeof val, "%d", (int)value);
else
Com_sprintf(val, sizeof val, "%f", value);
Cvar_Set(var_name, val);
}
/* Any variables with latched values will now be updated */
void
Cvar_GetLatchedVars(void)
{
cvar_t *p;
for(p = cvar_vars; p != nil; p = p->next){
if(!p->latched_string)
continue;
Z_Free(p->string);
p->string = p->latched_string;
p->latched_string = nil;
p->value = atof(p->string);
if(!strcmp(p->name, "game")){
FS_SetGamedir(p->string);
FS_ExecAutoexec();
}
}
}
/* called by Cmd_ExecuteString when Cmd_Argv(0) doesn't match a known command.
* Returns true if the command was a variable reference that was handled (print
* or change). */
qboolean
Cvar_Command(void)
{
cvar_t *p;
/* check variables */
if((p = Cvar_FindVar(Cmd_Argv(0))) == nil)
return false;
/* perform a variable print or set */
if(Cmd_Argc() == 1){
Com_Printf("\"%s\" is \"%s\"\n", p->name, p->string);
return true;
}
Cvar_Set(p->name, Cmd_Argv(1));
return true;
}
/* 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));
}
/* Appends lines containing "set variable value" for all variables with the
* archive flag set to true. */
void
Cvar_WriteVariables(char *path)
{
int fd;
cvar_t *p;
if((fd = open(path, OWRITE)) < 0){
fprint(2, "Cvar_WriteVariables:open: %r\n");
return;
}
seek(fd, 0, 2);
for(p = cvar_vars; p != nil; p = p->next)
if(p->flags & CVAR_ARCHIVE)
if(fprint(fd, "set %s \"%s\"\n", p->name, p->string) < 0)
sysfatal("Cvar_WriteVariables:fprint: %r");
close(fd);
}
void
Cvar_List_f(void)
{
cvar_t *p;
int i;
for(p = cvar_vars, i = 0; p != nil; p = p->next, i++){
if(p->flags & CVAR_ARCHIVE)
Com_Printf("*");
else
Com_Printf(" ");
if(p->flags & CVAR_USERINFO)
Com_Printf("U");
else
Com_Printf(" ");
if(p->flags & CVAR_SERVERINFO)
Com_Printf("S");
else
Com_Printf(" ");
if(p->flags & CVAR_NOSET)
Com_Printf("-");
else if(p->flags & CVAR_LATCH)
Com_Printf("L");
else
Com_Printf(" ");
Com_Printf(" %s \"%s\"\n", p->name, p->string);
}
Com_Printf("%d cvars\n", i);
}
char *
Cvar_BitInfo(int bit)
{
static char info[MAX_INFO_STRING];
cvar_t *p;
info[0] = 0;
for(p = cvar_vars; p != nil; p = p->next)
if(p->flags & bit)
Info_SetValueForKey(info, p->name, p->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);
}
void
Cvar_Init(void)
{
Cmd_AddCommand("set", Cvar_Set_f);
Cmd_AddCommand("cvarlist", Cvar_List_f);
}