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cvar.c

/*
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"

const char *cvar_dummy_description = "custom cvar";

cvar_t *cvar_vars = NULL;
cvar_t *cvar_hashtable[CVAR_HASHSIZE];
const char *cvar_null_string = "";

/*
============
Cvar_FindVar
============
*/
cvar_t *Cvar_FindVar (const char *var_name)
{
      int hashindex;
      cvar_t *var;

      // use hash lookup to minimize search time
      hashindex = CRC_Block((const unsigned char *)var_name, strlen(var_name)) % CVAR_HASHSIZE;
      for (var = cvar_hashtable[hashindex];var;var = var->nextonhashchain)
            if (!strcmp (var_name, var->name))
                  return var;

      return NULL;
}

cvar_t *Cvar_FindVarAfter (const char *prev_var_name, int neededflags)
{
      cvar_t *var;

      if (*prev_var_name)
      {
            var = Cvar_FindVar (prev_var_name);
            if (!var)
                  return NULL;
            var = var->next;
      }
      else
            var = cvar_vars;

      // search for the next cvar matching the needed flags
      while (var)
      {
            if ((var->flags & neededflags) || !neededflags)
                  break;
            var = var->next;
      }
      return var;
}

cvar_t *Cvar_FindVarLink (const char *var_name, cvar_t **parent, cvar_t ***link, cvar_t **prev_alpha)
{
      int hashindex;
      cvar_t *var;

      // use hash lookup to minimize search time
      hashindex = CRC_Block((const unsigned char *)var_name, strlen(var_name));
      if(parent) *parent = NULL;
      if(prev_alpha) *prev_alpha = NULL;
      if(link) *link = &cvar_hashtable[hashindex];
      for (var = cvar_hashtable[hashindex];var;var = var->nextonhashchain)
      {
            if (!strcmp (var_name, var->name))
            {
                  if(!prev_alpha || var == cvar_vars)
                        return var;

                  *prev_alpha = cvar_vars;
                  // if prev_alpha happens to become NULL then there has been some inconsistency elsewhere
                  // already - should I still insert '*prev_alpha &&' in the loop?
                  while((*prev_alpha)->next != var)
                        *prev_alpha = (*prev_alpha)->next;
                  return var;
            }
            if(parent) *parent = var;
      }

      return NULL;
}

/*
============
Cvar_VariableValue
============
*/
float Cvar_VariableValue (const char *var_name)
{
      cvar_t *var;

      var = Cvar_FindVar (var_name);
      if (!var)
            return 0;
      return atof (var->string);
}


/*
============
Cvar_VariableString
============
*/
const char *Cvar_VariableString (const char *var_name)
{
      cvar_t *var;

      var = Cvar_FindVar (var_name);
      if (!var)
            return cvar_null_string;
      return var->string;
}

/*
============
Cvar_VariableDefString
============
*/
const char *Cvar_VariableDefString (const char *var_name)
{
      cvar_t *var;

      var = Cvar_FindVar (var_name);
      if (!var)
            return cvar_null_string;
      return var->defstring;
}

/*
============
Cvar_VariableDescription
============
*/
const char *Cvar_VariableDescription (const char *var_name)
{
      cvar_t *var;

      var = Cvar_FindVar (var_name);
      if (!var)
            return cvar_null_string;
      return var->description;
}


/*
============
Cvar_CompleteVariable
============
*/
const char *Cvar_CompleteVariable (const char *partial)
{
      cvar_t            *cvar;
      size_t            len;

      len = strlen(partial);

      if (!len)
            return NULL;

// check functions
      for (cvar=cvar_vars ; cvar ; cvar=cvar->next)
            if (!strncasecmp (partial,cvar->name, len))
                  return cvar->name;

      return NULL;
}


/*
      CVar_CompleteCountPossible

      New function for tab-completion system
      Added by EvilTypeGuy
      Thanks to Fett erich@heintz.com

*/
int Cvar_CompleteCountPossible (const char *partial)
{
      cvar_t      *cvar;
      size_t      len;
      int         h;

      h = 0;
      len = strlen(partial);

      if (!len)
            return      0;

      // Loop through the cvars and count all possible matches
      for (cvar = cvar_vars; cvar; cvar = cvar->next)
            if (!strncasecmp(partial, cvar->name, len))
                  h++;

      return h;
}

/*
      CVar_CompleteBuildList

      New function for tab-completion system
      Added by EvilTypeGuy
      Thanks to Fett erich@heintz.com
      Thanks to taniwha

*/
const char **Cvar_CompleteBuildList (const char *partial)
{
      const cvar_t *cvar;
      size_t len = 0;
      size_t bpos = 0;
      size_t sizeofbuf = (Cvar_CompleteCountPossible (partial) + 1) * sizeof (const char *);
      const char **buf;

      len = strlen(partial);
      buf = (const char **)Mem_Alloc(tempmempool, sizeofbuf + sizeof (const char *));
      // Loop through the alias list and print all matches
      for (cvar = cvar_vars; cvar; cvar = cvar->next)
            if (!strncasecmp(partial, cvar->name, len))
                  buf[bpos++] = cvar->name;

      buf[bpos] = NULL;
      return buf;
}

// written by LordHavoc
void Cvar_CompleteCvarPrint (const char *partial)
{
      cvar_t *cvar;
      size_t len = strlen(partial);
      // Loop through the command list and print all matches
      for (cvar = cvar_vars; cvar; cvar = cvar->next)
            if (!strncasecmp(partial, cvar->name, len))
                  Con_Printf ("^3%s^7 is \"%s\" [\"%s\"] %s\n", cvar->name, cvar->string, cvar->defstring, cvar->description);
}

// we assume that prog is already set to the target progs
static void Cvar_UpdateAutoCvar(cvar_t *var)
{
      int i;
      if(!prog)
            Host_Error("Cvar_UpdateAutoCvar: no prog set");
      i = PRVM_GetProgNr();
      if(var->globaldefindex_progid[i] == prog->id)
      {
            // MUST BE SYNCED WITH prvm_edict.c PRVM_LoadProgs
            int j;
            const char *s;
            vec3_t v;
            switch(prog->globaldefs[var->globaldefindex[i]].type & ~DEF_SAVEGLOBAL)
            {
                  case ev_float:
                        PRVM_GLOBALFIELDFLOAT(prog->globaldefs[var->globaldefindex[i]].ofs) = var->value;
                        break;
                  case ev_vector:
                        s = var->string;
                        VectorClear(v);
                        for (j = 0;j < 3;j++)
                        {
                              while (*s && ISWHITESPACE(*s))
                                    s++;
                              if (!*s)
                                    break;
                              v[j] = atof(s);
                              while (!ISWHITESPACE(*s))
                                    s++;
                              if (!*s)
                                    break;
                        }
                        VectorCopy(v, PRVM_GLOBALFIELDVECTOR(prog->globaldefs[var->globaldefindex[i]].ofs));
                        break;
                  case ev_string:
                        PRVM_ChangeEngineString(var->globaldefindex_stringno[i], var->string);
                        PRVM_GLOBALFIELDSTRING(prog->globaldefs[var->globaldefindex[i]].ofs) = var->globaldefindex_stringno[i];
                        break;
            }
      }
}

// called after loading a savegame
void Cvar_UpdateAllAutoCvars(void)
{
      cvar_t *var;
      for (var = cvar_vars ; var ; var = var->next)
            Cvar_UpdateAutoCvar(var);
}

/*
============
Cvar_Set
============
*/
void Cvar_SetQuick_Internal (cvar_t *var, const char *value)
{
      qboolean changed;
      size_t valuelen;
      prvm_prog_t *tmpprog;
      int i;

      changed = strcmp(var->string, value) != 0;
      // LordHavoc: don't reallocate when there is no change
      if (!changed)
            return;

      // LordHavoc: don't reallocate when the buffer is the same size
      valuelen = strlen(value);
      if (!var->string || strlen(var->string) != valuelen)
      {
            Z_Free ((char *)var->string); // free the old value string

            var->string = (char *)Z_Malloc (valuelen + 1);
      }
      memcpy ((char *)var->string, value, valuelen + 1);
      var->value = atof (var->string);
      var->integer = (int) var->value;
      if ((var->flags & CVAR_NOTIFY) && changed && sv.active)
            SV_BroadcastPrintf("\"%s\" changed to \"%s\"\n", var->name, var->string);
#if 0
      // TODO: add infostring support to the server?
      if ((var->flags & CVAR_SERVERINFO) && changed && sv.active)
      {
            InfoString_SetValue(svs.serverinfo, sizeof(svs.serverinfo), var->name, var->string);
            if (sv.active)
            {
                  MSG_WriteByte (&sv.reliable_datagram, svc_serverinfostring);
                  MSG_WriteString (&sv.reliable_datagram, var->name);
                  MSG_WriteString (&sv.reliable_datagram, var->string);
            }
      }
#endif
      if ((var->flags & CVAR_USERINFO) && cls.state != ca_dedicated)
            CL_SetInfo(var->name, var->string, true, false, false, false);
      else if ((var->flags & CVAR_NQUSERINFOHACK) && cls.state != ca_dedicated)
      {
            // update the cls.userinfo to have proper values for the
            // silly nq config variables.
            //
            // this is done when these variables are changed rather than at
            // connect time because if the user or code checks the userinfo and it
            // holds weird values it may cause confusion...
            if (!strcmp(var->name, "_cl_color"))
            {
                  int top = (var->integer >> 4) & 15, bottom = var->integer & 15;
                  CL_SetInfo("topcolor", va("%i", top), true, false, false, false);
                  CL_SetInfo("bottomcolor", va("%i", bottom), true, false, false, false);
                  if (cls.protocol != PROTOCOL_QUAKEWORLD && cls.netcon)
                  {
                        MSG_WriteByte(&cls.netcon->message, clc_stringcmd);
                        MSG_WriteString(&cls.netcon->message, va("color %i %i", top, bottom));
                  }
            }
            else if (!strcmp(var->name, "_cl_rate"))
                  CL_SetInfo("rate", va("%i", var->integer), true, false, false, false);
            else if (!strcmp(var->name, "_cl_playerskin"))
                  CL_SetInfo("playerskin", var->string, true, false, false, false);
            else if (!strcmp(var->name, "_cl_playermodel"))
                  CL_SetInfo("playermodel", var->string, true, false, false, false);
            else if (!strcmp(var->name, "_cl_name"))
                  CL_SetInfo("name", var->string, true, false, false, false);
            else if (!strcmp(var->name, "rcon_secure"))
            {
                  // whenever rcon_secure is changed to 0, clear rcon_password for
                  // security reasons (prevents a send-rcon-password-as-plaintext
                  // attack based on NQ protocol session takeover and svc_stufftext)
                  if(var->integer <= 0)
                        Cvar_Set("rcon_password", "");
            }
            else if (!strcmp(var->name, "net_slist_favorites"))
                  NetConn_UpdateFavorites();
      }

      tmpprog = prog;
      for(i = 0; i < PRVM_MAXPROGS; ++i)
      {
            if(PRVM_ProgLoaded(i))
            {
                  PRVM_SetProg(i);
                  Cvar_UpdateAutoCvar(var);
            }
      }
      prog = tmpprog;
}

void Cvar_SetQuick (cvar_t *var, const char *value)
{
      if (var == NULL)
      {
            Con_Print("Cvar_SetQuick: var == NULL\n");
            return;
      }

      if (developer_extra.integer)
            Con_DPrintf("Cvar_SetQuick({\"%s\", \"%s\", %i, \"%s\"}, \"%s\");\n", var->name, var->string, var->flags, var->defstring, value);

      Cvar_SetQuick_Internal(var, value);
}

void Cvar_Set (const char *var_name, const char *value)
{
      cvar_t *var;
      var = Cvar_FindVar (var_name);
      if (var == NULL)
      {
            Con_Printf("Cvar_Set: variable %s not found\n", var_name);
            return;
      }
      Cvar_SetQuick(var, value);
}

/*
============
Cvar_SetValue
============
*/
void Cvar_SetValueQuick(cvar_t *var, float value)
{
      char val[MAX_INPUTLINE];

      if ((float)((int)value) == value)
            dpsnprintf(val, sizeof(val), "%i", (int)value);
      else
            dpsnprintf(val, sizeof(val), "%f", value);
      Cvar_SetQuick(var, val);
}

void Cvar_SetValue(const char *var_name, float value)
{
      char val[MAX_INPUTLINE];

      if ((float)((int)value) == value)
            dpsnprintf(val, sizeof(val), "%i", (int)value);
      else
            dpsnprintf(val, sizeof(val), "%f", value);
      Cvar_Set(var_name, val);
}

/*
============
Cvar_RegisterVariable

Adds a freestanding variable to the variable list.
============
*/
void Cvar_RegisterVariable (cvar_t *variable)
{
      int hashindex;
      cvar_t *current, *next, *cvar;
      char *oldstr;
      size_t alloclen;

      if (developer_extra.integer)
            Con_DPrintf("Cvar_RegisterVariable({\"%s\", \"%s\", %i});\n", variable->name, variable->string, variable->flags);

// first check to see if it has already been defined
      cvar = Cvar_FindVar (variable->name);
      if (cvar)
      {
            if (cvar->flags & CVAR_ALLOCATED)
            {
                  if (developer_extra.integer)
                        Con_DPrintf("...  replacing existing allocated cvar {\"%s\", \"%s\", %i}\n", cvar->name, cvar->string, cvar->flags);
                  // fixed variables replace allocated ones
                  // (because the engine directly accesses fixed variables)
                  // NOTE: this isn't actually used currently
                  // (all cvars are registered before config parsing)
                  variable->flags |= (cvar->flags & ~CVAR_ALLOCATED);
                  // cvar->string is now owned by variable instead
                  variable->string = cvar->string;
                  variable->defstring = cvar->defstring;
                  variable->value = atof (variable->string);
                  variable->integer = (int) variable->value;
                  // replace cvar with this one...
                  variable->next = cvar->next;
                  if (cvar_vars == cvar)
                  {
                        // head of the list is easy to change
                        cvar_vars = variable;
                  }
                  else
                  {
                        // otherwise find it somewhere in the list
                        for (current = cvar_vars;current->next != cvar;current = current->next)
                              ;
                        current->next = variable;
                  }

                  // get rid of old allocated cvar
                  // (but not cvar->string and cvar->defstring, because we kept those)
                  Z_Free((char *)cvar->name);
                  Z_Free(cvar);
            }
            else
                  Con_DPrintf("Can't register variable %s, already 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 = (char *)variable->string;
      alloclen = strlen(variable->string) + 1;
      variable->string = (char *)Z_Malloc (alloclen);
      memcpy ((char *)variable->string, oldstr, alloclen);
      variable->defstring = (char *)Z_Malloc (alloclen);
      memcpy ((char *)variable->defstring, oldstr, alloclen);
      variable->value = atof (variable->string);
      variable->integer = (int) variable->value;

// link the variable in
// alphanumerical order
      for( current = NULL, next = cvar_vars ; next && strcmp( next->name, variable->name ) < 0 ; current = next, next = next->next )
            ;
      if( current ) {
            current->next = variable;
      } else {
            cvar_vars = variable;
      }
      variable->next = next;

      // link to head of list in this hash table index
      hashindex = CRC_Block((const unsigned char *)variable->name, strlen(variable->name)) % CVAR_HASHSIZE;
      variable->nextonhashchain = cvar_hashtable[hashindex];
      cvar_hashtable[hashindex] = variable;
}

/*
============
Cvar_Get

Adds a newly allocated variable to the variable list or sets its value.
============
*/
cvar_t *Cvar_Get (const char *name, const char *value, int flags, const char *newdescription)
{
      int hashindex;
      cvar_t *current, *next, *cvar;

      if (developer_extra.integer)
            Con_DPrintf("Cvar_Get(\"%s\", \"%s\", %i);\n", name, value, flags);

// first check to see if it has already been defined
      cvar = Cvar_FindVar (name);
      if (cvar)
      {
            cvar->flags |= flags;
            Cvar_SetQuick_Internal (cvar, value);
            if(newdescription && (cvar->flags & CVAR_ALLOCATED))
            {
                  if(cvar->description != cvar_dummy_description)
                        Z_Free((char *)cvar->description);

                  if(*newdescription)
                        cvar->description = (char *)Mem_strdup(zonemempool, newdescription);
                  else
                        cvar->description = cvar_dummy_description;
            }
            return cvar;
      }

// check for pure evil
      if (!*name)
      {
            Con_Printf("Cvar_Get: invalid variable name\n");
            return NULL;
      }

// check for overlap with a command
      if (Cmd_Exists (name))
      {
            Con_Printf("Cvar_Get: %s is a command\n", name);
            return NULL;
      }

// allocate a new cvar, cvar name, and cvar string
// TODO: factorize the following code with the one at the end of Cvar_RegisterVariable()
// FIXME: these never get Z_Free'd
      cvar = (cvar_t *)Z_Malloc(sizeof(cvar_t));
      cvar->flags = flags | CVAR_ALLOCATED;
      cvar->name = (char *)Mem_strdup(zonemempool, name);
      cvar->string = (char *)Mem_strdup(zonemempool, value);
      cvar->defstring = (char *)Mem_strdup(zonemempool, value);
      cvar->value = atof (cvar->string);
      cvar->integer = (int) cvar->value;

      if(newdescription && *newdescription)
            cvar->description = (char *)Mem_strdup(zonemempool, newdescription);
      else
            cvar->description = cvar_dummy_description; // actually checked by VM_cvar_type

// link the variable in
// alphanumerical order
      for( current = NULL, next = cvar_vars ; next && strcmp( next->name, cvar->name ) < 0 ; current = next, next = next->next )
            ;
      if( current )
            current->next = cvar;
      else
            cvar_vars = cvar;
      cvar->next = next;

      // link to head of list in this hash table index
      hashindex = CRC_Block((const unsigned char *)cvar->name, strlen(cvar->name)) % CVAR_HASHSIZE;
      cvar->nextonhashchain = cvar_hashtable[hashindex];
      cvar_hashtable[hashindex] = cvar;

      return cvar;
}


/*
============
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\" [\"%s\"]\n", v->name, ((v->flags & CVAR_PRIVATE) ? "********"/*hunter2*/ : v->string), v->defstring);
            return true;
      }

      if (developer_extra.integer)
            Con_DPrint("Cvar_Command: ");

      if (v->flags & CVAR_READONLY)
      {
            Con_Printf("%s is read-only\n", v->name);
            return true;
      }
      Cvar_Set (v->name, Cmd_Argv(1));
      if (developer_extra.integer)
            Con_DPrint("\n");
      return true;
}


void Cvar_UnlockDefaults (void)
{
      cvar_t *var;
      // unlock the default values of all cvars
      for (var = cvar_vars ; var ; var = var->next)
            var->flags &= ~CVAR_DEFAULTSET;
}


void Cvar_LockDefaults_f (void)
{
      cvar_t *var;
      // lock in the default values of all cvars
      for (var = cvar_vars ; var ; var = var->next)
      {
            if (!(var->flags & CVAR_DEFAULTSET))
            {
                  size_t alloclen;

                  //Con_Printf("locking cvar %s (%s -> %s)\n", var->name, var->string, var->defstring);
                  var->flags |= CVAR_DEFAULTSET;
                  Z_Free((char *)var->defstring);
                  alloclen = strlen(var->string) + 1;
                  var->defstring = (char *)Z_Malloc(alloclen);
                  memcpy((char *)var->defstring, var->string, alloclen);
            }
      }
}

void Cvar_SaveInitState(void)
{
      cvar_t *c;
      for (c = cvar_vars;c;c = c->next)
      {
            c->initstate = true;
            c->initflags = c->flags;
            c->initdefstring = Mem_strdup(zonemempool, c->defstring);
            c->initstring = Mem_strdup(zonemempool, c->string);
            c->initvalue = c->value;
            c->initinteger = c->integer;
            VectorCopy(c->vector, c->initvector);
      }
}

void Cvar_RestoreInitState(void)
{
      int hashindex;
      cvar_t *c, **cp;
      cvar_t *c2, **cp2;
      for (cp = &cvar_vars;(c = *cp);)
      {
            if (c->initstate)
            {
                  // restore this cvar, it existed at init
                  if (((c->flags ^ c->initflags) & CVAR_MAXFLAGSVAL)
                   || strcmp(c->defstring ? c->defstring : "", c->initdefstring ? c->initdefstring : "")
                   || strcmp(c->string ? c->string : "", c->initstring ? c->initstring : ""))
                  {
                        Con_DPrintf("Cvar_RestoreInitState: Restoring cvar \"%s\"\n", c->name);
                        if (c->defstring)
                              Z_Free((char *)c->defstring);
                        c->defstring = Mem_strdup(zonemempool, c->initdefstring);
                        if (c->string)
                              Z_Free((char *)c->string);
                        c->string = Mem_strdup(zonemempool, c->initstring);
                  }
                  c->flags = c->initflags;
                  c->value = c->initvalue;
                  c->integer = c->initinteger;
                  VectorCopy(c->initvector, c->vector);
                  cp = &c->next;
            }
            else
            {
                  if (!(c->flags & CVAR_ALLOCATED))
                  {
                        Con_DPrintf("Cvar_RestoreInitState: Unable to destroy cvar \"%s\", it was registered after init!\n", c->name);
                        continue;
                  }
                  // remove this cvar, it did not exist at init
                  Con_DPrintf("Cvar_RestoreInitState: Destroying cvar \"%s\"\n", c->name);
                  // unlink struct from hash
                  hashindex = CRC_Block((const unsigned char *)c->name, strlen(c->name)) % CVAR_HASHSIZE;
                  for (cp2 = &cvar_hashtable[hashindex];(c2 = *cp2);)
                  {
                        if (c2 == c)
                        {
                              *cp2 = c2->nextonhashchain;
                              break;
                        }
                        else
                              cp2 = &c2->nextonhashchain;
                  }
                  // unlink struct from main list
                  *cp = c->next;
                  // free strings
                  if (c->defstring)
                        Z_Free((char *)c->defstring);
                  if (c->string)
                        Z_Free((char *)c->string);
                  if (c->description && c->description != cvar_dummy_description)
                        Z_Free((char *)c->description);
                  // free struct
                  Z_Free(c);
            }
      }
}

void Cvar_ResetToDefaults_All_f (void)
{
      cvar_t *var;
      // restore the default values of all cvars
      for (var = cvar_vars ; var ; var = var->next)
            if((var->flags & CVAR_NORESETTODEFAULTS) == 0)
                  Cvar_SetQuick(var, var->defstring);
}


void Cvar_ResetToDefaults_NoSaveOnly_f (void)
{
      cvar_t *var;
      // restore the default values of all cvars
      for (var = cvar_vars ; var ; var = var->next)
            if ((var->flags & (CVAR_NORESETTODEFAULTS | CVAR_SAVE)) == 0)
                  Cvar_SetQuick(var, var->defstring);
}


void Cvar_ResetToDefaults_SaveOnly_f (void)
{
      cvar_t *var;
      // restore the default values of all cvars
      for (var = cvar_vars ; var ; var = var->next)
            if ((var->flags & (CVAR_NORESETTODEFAULTS | CVAR_SAVE)) == CVAR_SAVE)
                  Cvar_SetQuick(var, var->defstring);
}


/*
============
Cvar_WriteVariables

Writes lines containing "set variable value" for all variables
with the archive flag set to true.
============
*/
void Cvar_WriteVariables (qfile_t *f)
{
      cvar_t      *var;
      char buf1[MAX_INPUTLINE], buf2[MAX_INPUTLINE];

      // don't save cvars that match their default value
      for (var = cvar_vars ; var ; var = var->next)
            if ((var->flags & CVAR_SAVE) && (strcmp(var->string, var->defstring) || !(var->flags & CVAR_DEFAULTSET)))
            {
                  Cmd_QuoteString(buf1, sizeof(buf1), var->name, "\"\\$", false);
                  Cmd_QuoteString(buf2, sizeof(buf2), var->string, "\"\\$", false);
                  FS_Printf(f, "%s\"%s\" \"%s\"\n", var->flags & CVAR_ALLOCATED ? "seta " : "", buf1, buf2);
            }
}


// Added by EvilTypeGuy eviltypeguy@qeradiant.com
// 2000-01-09 CvarList command By Matthias "Maddes" Buecher, http://www.inside3d.com/qip/
/*
=========
Cvar_List
=========
*/
void Cvar_List_f (void)
{
      cvar_t *cvar;
      const char *partial;
      size_t len;
      int count;
      qboolean ispattern;

      if (Cmd_Argc() > 1)
      {
            partial = Cmd_Argv (1);
            len = strlen(partial);
      }
      else
      {
            partial = NULL;
            len = 0;
      }

      ispattern = partial && (strchr(partial, '*') || strchr(partial, '?'));

      count = 0;
      for (cvar = cvar_vars; cvar; cvar = cvar->next)
      {
            if (len && (ispattern ? !matchpattern_with_separator(cvar->name, partial, false, "", false) : strncmp (partial,cvar->name,len)))
                  continue;

            Con_Printf("%s is \"%s\" [\"%s\"] %s\n", cvar->name, ((cvar->flags & CVAR_PRIVATE) ? "********"/*hunter2*/ : cvar->string), cvar->defstring, cvar->description);
            count++;
      }

      if (len)
      {
            if(ispattern)
                  Con_Printf("%i cvar%s matching \"%s\"\n", count, (count > 1) ? "s" : "", partial);
            else
                  Con_Printf("%i cvar%s beginning with \"%s\"\n", count, (count > 1) ? "s" : "", partial);
      }
      else
            Con_Printf("%i cvar(s)\n", count);
}
// 2000-01-09 CvarList command by Maddes

void Cvar_Set_f (void)
{
      cvar_t *cvar;

      // make sure it's the right number of parameters
      if (Cmd_Argc() < 3)
      {
            Con_Printf("Set: wrong number of parameters, usage: set <variablename> <value> [<description>]\n");
            return;
      }

      // check if it's read-only
      cvar = Cvar_FindVar(Cmd_Argv(1));
      if (cvar && cvar->flags & CVAR_READONLY)
      {
            Con_Printf("Set: %s is read-only\n", cvar->name);
            return;
      }

      if (developer_extra.integer)
            Con_DPrint("Set: ");

      // all looks ok, create/modify the cvar
      Cvar_Get(Cmd_Argv(1), Cmd_Argv(2), 0, Cmd_Argc() > 3 ? Cmd_Argv(3) : NULL);
}

void Cvar_SetA_f (void)
{
      cvar_t *cvar;

      // make sure it's the right number of parameters
      if (Cmd_Argc() < 3)
      {
            Con_Printf("SetA: wrong number of parameters, usage: seta <variablename> <value> [<description>]\n");
            return;
      }

      // check if it's read-only
      cvar = Cvar_FindVar(Cmd_Argv(1));
      if (cvar && cvar->flags & CVAR_READONLY)
      {
            Con_Printf("SetA: %s is read-only\n", cvar->name);
            return;
      }

      if (developer_extra.integer)
            Con_DPrint("SetA: ");

      // all looks ok, create/modify the cvar
      Cvar_Get(Cmd_Argv(1), Cmd_Argv(2), CVAR_SAVE, Cmd_Argc() > 3 ? Cmd_Argv(3) : NULL);
}

void Cvar_Del_f (void)
{
      int i;
      cvar_t *cvar, *parent, **link, *prev;

      if(Cmd_Argc() < 2)
      {
            Con_Printf("Del: wrong number of parameters, useage: unset <variablename1> [<variablename2> ...]\n");
            return;
      }
      for(i = 1; i < Cmd_Argc(); ++i)
      {
            cvar = Cvar_FindVarLink(Cmd_Argv(i), &parent, &link, &prev);
            if(!cvar)
            {
                  Con_Printf("Del: %s is not defined\n", Cmd_Argv(i));
                  continue;
            }
            if(cvar->flags & CVAR_READONLY)
            {
                  Con_Printf("Del: %s is read-only\n", cvar->name);
                  continue;
            }
            if(!(cvar->flags & CVAR_ALLOCATED))
            {
                  Con_Printf("Del: %s is static and cannot be deleted\n", cvar->name);
                  continue;
            }
            if(cvar == cvar_vars)
            {
                  cvar_vars = cvar->next;
            }
            else
            {
                  // in this case, prev must be set, otherwise there has been some inconsistensy
                  // elsewhere already... should I still check for prev != NULL?
                  prev->next = cvar->next;
            }

            if(parent)
                  parent->nextonhashchain = cvar->nextonhashchain;
            else if(link)
                  *link = cvar->nextonhashchain;

            if(cvar->description != cvar_dummy_description)
                  Z_Free((char *)cvar->description);

            Z_Free((char *)cvar->name);
            Z_Free((char *)cvar->string);
            Z_Free((char *)cvar->defstring);
            Z_Free(cvar);
      }
}

#ifdef FILLALLCVARSWITHRUBBISH
void Cvar_FillAll_f()
{
      char *buf, *p, *q;
      int n, i;
      cvar_t *var;
      qboolean verify;
      if(Cmd_Argc() != 2)
      {
            Con_Printf("Usage: %s length to plant rubbish\n", Cmd_Argv(0));
            Con_Printf("Usage: %s -length to verify that the rubbish is still there\n", Cmd_Argv(0));
            return;
      }
      n = atoi(Cmd_Argv(1));
      verify = (n < 0);
      if(verify)
            n = -n;
      buf = Z_Malloc(n + 1);
      buf[n] = 0;
      for(var = cvar_vars; var; var = var->next)
      {
            for(i = 0, p = buf, q = var->name; i < n; ++i)
            {
                  *p++ = *q++;
                  if(!*q)
                        q = var->name;
            }
            if(verify && strcmp(var->string, buf))
            {
                  Con_Printf("\n%s does not contain the right rubbish, either this is the first run or a possible overrun was detected, or something changed it intentionally; it DOES contain: %s\n", var->name, var->string);
            }
            Cvar_SetQuick(var, buf);
      }
      Z_Free(buf);
}
#endif /* FILLALLCVARSWITHRUBBISH */

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