/*
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;
}


//Edited qrack command line begin
/*
============
Cvar_CompleteCountPossible
============
*/
int Cvar_CompleteCountPossible(char *partial)
{
    cvar_t	*cvar;
    int	len, c = 0;

    if (!(len = strlen(partial))) {
        return 0;
    }

    // check partial match
    for (cvar = cvar_vars ; cvar ; cvar = cvar->next)
        if (!Q_strncasecmp(partial, cvar->name, len)) {
            c++;
        }

    return c;
}

//Edited qrack command line end

/*
============
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_DPrintf("Cvar_Set: variable %s not found\n", var_name);  // edited
        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)
            if (svs.maxclients > 1) { // Edited
                SV_BroadcastPrintf("\"%s\" changed to \"%s\"\n", var->name, var->string);
            }
    }
    //Heffo - Cvar Callback Function
    if (var->Cvar_Changed) {
        var->Cvar_Changed();
    }
    //Heffo - Cvar Callback Function
}

/*
============
Cvar_SetValue
============
*/
extern char *MK_cleanftos(float f);  // reduced config file
void Cvar_SetValue(char *var_name, float value)
{
    char	val[32];

    sprintf(val, "%s", MK_cleanftos(value));  // reduced config file
    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;
}
//Edited & Heffo - Cvar Callback Function - begin
void Cvar_RegisterVariableWithCallback(cvar_t *variable, void *function)
{
// 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;
    }
    Cvar_RegisterVariable(variable);
    variable->Cvar_Changed = function;
}
//Edited & Heffo - Cvar Callback Function - end
/*
============
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.
============
*/
qboolean HaveSemicolon(char *s);  // reduced config file
void Cvar_WriteVariables(FILE *f)
{
    cvar_t	*var;

    for (var = cvar_vars ; var ; var = var->next)
        if (var->archive)
            // reduced config file - begin
        {
            Cmd_TokenizeString(var->string);
            if (Cmd_Argc() == 1 && !HaveSemicolon(var->string)) {
                fprintf(f, "%s %s\n", var->name, var->string);
            } else
                // reduced config file - end
            {
                fprintf(f, "%s \"%s\"\n", var->name, var->string);
            }
        } // reduced config file
}

