/*
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.

*/

#include "qwsvdef.h"

#define RETURN_EDICT(e) (((int *)pr_globals)[OFS_RETURN] = EDICT_TO_PROG(e))
#define RETURN_STRING(s) (((int *)pr_globals)[OFS_RETURN] = PR_SetString(s))

/*
===============================================================================

            BUILT-IN FUNCTIONS

===============================================================================
*/

char *PF_VarString (int first)
{
  int   i;
  static char out[256];
  
  out[0] = 0;
  for (i=first ; i<pr_argc ; i++)
  {
    strcat (out, G_STRING((OFS_PARM0+i*3)));
  }
  return out;
}


/*
=================
PF_errror

This is a TERMINAL error, which will kill off the entire server.
Dumps self.

error(value)
=================
*/
void PF_error (void)
{
  char  *s;
  edict_t *ed;
  
  s = PF_VarString(0);
  Con_Printf ("======SERVER ERROR in %s:\n%s\n", PR_GetString(pr_xfunction->s_name) ,s);
  ed = PROG_TO_EDICT(pr_global_struct->self);
  ED_Print (ed);

  SV_Error ("Program error");
}

/*
=================
PF_objerror

Dumps out self, then an error message.  The program is aborted and self is
removed, but the level can continue.

objerror(value)
=================
*/
void PF_objerror (void)
{
  char  *s;
  edict_t *ed;
  
  s = PF_VarString(0);
  Con_Printf ("======OBJECT ERROR in %s:\n%s\n", PR_GetString(pr_xfunction->s_name),s);
  ed = PROG_TO_EDICT(pr_global_struct->self);
  ED_Print (ed);
  ED_Free (ed);
  
  SV_Error ("Program error");
}



/*
==============
PF_makevectors

Writes new values for v_forward, v_up, and v_right based on angles
makevectors(vector)
==============
*/
void PF_makevectors (void)
{
  AngleVectors (G_VECTOR(OFS_PARM0), pr_global_struct->v_forward, pr_global_struct->v_right, pr_global_struct->v_up);
}

/*
=================
PF_setorigin

This is the only valid way to move an object without using the physics of the world (setting velocity and waiting).  Directly changing origin will not set internal links correctly, so clipping would be messed up.  This should be called when an object is spawned, and then only if it is teleported.

setorigin (entity, origin)
=================
*/
void PF_setorigin (void)
{
  edict_t *e;
  float *org;
  
  e = G_EDICT(OFS_PARM0);
  org = G_VECTOR(OFS_PARM1);
  VectorCopy (org, e->v.origin);
  SV_LinkEdict (e, false);
}


/*
=================
PF_setsize

the size box is rotated by the current angle

setsize (entity, minvector, maxvector)
=================
*/
void PF_setsize (void)
{
  edict_t *e;
  float *min, *max;
  
  e = G_EDICT(OFS_PARM0);
  min = G_VECTOR(OFS_PARM1);
  max = G_VECTOR(OFS_PARM2);
  VectorCopy (min, e->v.mins);
  VectorCopy (max, e->v.maxs);
  VectorSubtract (max, min, e->v.size);
  SV_LinkEdict (e, false);
}


/*
=================
PF_setmodel

setmodel(entity, model)
Also sets size, mins, and maxs for inline bmodels
=================
*/
void PF_setmodel (void)
{
  edict_t *e;
  char  *m, **check;
  int   i;
  model_t *mod;

  e = G_EDICT(OFS_PARM0);
  m = G_STRING(OFS_PARM1);

// check to see if model was properly precached
  for (i=0, check = sv.model_precache ; *check ; i++, check++)
    if (!strcmp(*check, m))
      break;

  if (!*check)
    PR_RunError ("no precache: %s\n", m);
    
  e->v.model = PR_SetString(m);
  e->v.modelindex = i;

// if it is an inline model, get the size information for it
  if (m[0] == '*')
  {
    mod = Mod_ForName (m, true);
    VectorCopy (mod->mins, e->v.mins);
    VectorCopy (mod->maxs, e->v.maxs);
    VectorSubtract (mod->maxs, mod->mins, e->v.size);
    SV_LinkEdict (e, false);
  }

}

/*
=================
PF_bprint

broadcast print to everyone on server

bprint(value)
=================
*/
void PF_bprint (void)
{
  char    *s;
  int     level;
  
  level = G_FLOAT(OFS_PARM0);

  s = PF_VarString(1);
  SV_BroadcastPrintf (level, "%s", s);
}

/*
=================
PF_sprint

single print to a specific client

sprint(clientent, value)
=================
*/
void PF_sprint (void)
{
  char    *s;
  client_t  *client;
  int     entnum;
  int     level;
  
  entnum = G_EDICTNUM(OFS_PARM0);
  level = G_FLOAT(OFS_PARM1);

  s = PF_VarString(2);
  
  if (entnum < 1 || entnum > MAX_CLIENTS)
  {
    Con_Printf ("tried to sprint to a non-client\n");
    return;
  }
    
  client = &svs.clients[entnum-1];
  
  SV_ClientPrintf (client, level, "%s", s);
}


/*
=================
PF_centerprint

single print to a specific client

centerprint(clientent, value)
=================
*/
void PF_centerprint (void)
{
  char    *s;
  int     entnum;
  client_t  *cl;
  
  entnum = G_EDICTNUM(OFS_PARM0);
  s = PF_VarString(1);
  
  if (entnum < 1 || entnum > MAX_CLIENTS)
  {
    Con_Printf ("tried to sprint to a non-client\n");
    return;
  }
    
  cl = &svs.clients[entnum-1];

  ClientReliableWrite_Begin (cl, svc_centerprint, 2 + strlen(s));
  ClientReliableWrite_String (cl, s);
}


/*
=================
PF_normalize

vector normalize(vector)
=================
*/
void PF_normalize (void)
{
  float *value1;
  vec3_t  newvalue;
  float new;
  
  value1 = G_VECTOR(OFS_PARM0);

  new = value1[0] * value1[0] + value1[1] * value1[1] + value1[2]*value1[2];
  new = sqrt(new);
  
  if (new == 0)
    newvalue[0] = newvalue[1] = newvalue[2] = 0;
  else
  {
    new = 1/new;
    newvalue[0] = value1[0] * new;
    newvalue[1] = value1[1] * new;
    newvalue[2] = value1[2] * new;
  }
  
  VectorCopy (newvalue, G_VECTOR(OFS_RETURN));  
}

/*
=================
PF_vlen

scalar vlen(vector)
=================
*/
void PF_vlen (void)
{
  float *value1;
  float new;
  
  value1 = G_VECTOR(OFS_PARM0);

  new = value1[0] * value1[0] + value1[1] * value1[1] + value1[2]*value1[2];
  new = sqrt(new);
  
  G_FLOAT(OFS_RETURN) = new;
}

/*
=================
PF_vectoyaw

float vectoyaw(vector)
=================
*/
void PF_vectoyaw (void)
{
  float *value1;
  float yaw;
  
  value1 = G_VECTOR(OFS_PARM0);

  if (value1[1] == 0 && value1[0] == 0)
    yaw = 0;
  else
  {
    yaw = (int) (atan2(value1[1], value1[0]) * 180 / M_PI);
    if (yaw < 0)
      yaw += 360;
  }

  G_FLOAT(OFS_RETURN) = yaw;
}


/*
=================
PF_vectoangles

vector vectoangles(vector)
=================
*/
void PF_vectoangles (void)
{
  float *value1;
  float forward;
  float yaw, pitch;
  
  value1 = G_VECTOR(OFS_PARM0);

  if (value1[1] == 0 && value1[0] == 0)
  {
    yaw = 0;
    if (value1[2] > 0)
      pitch = 90;
    else
      pitch = 270;
  }
  else
  {
    yaw = (int) (atan2(value1[1], value1[0]) * 180 / M_PI);
    if (yaw < 0)
      yaw += 360;

    forward = sqrt (value1[0]*value1[0] + value1[1]*value1[1]);
    pitch = (int) (atan2(value1[2], forward) * 180 / M_PI);
    if (pitch < 0)
      pitch += 360;
  }

  G_FLOAT(OFS_RETURN+0) = pitch;
  G_FLOAT(OFS_RETURN+1) = yaw;
  G_FLOAT(OFS_RETURN+2) = 0;
}

/*
=================
PF_Random

Returns a number from 0<= num < 1

random()
=================
*/
void PF_random (void)
{
  float   num;
    
  num = (rand ()&0x7fff) / ((float)0x7fff);
  
  G_FLOAT(OFS_RETURN) = num;
}


/*
=================
PF_ambientsound

=================
*/
void PF_ambientsound (void)
{
  char    **check;
  char    *samp;
  float   *pos;
  float     vol, attenuation;
  int     i, soundnum;

  pos = G_VECTOR (OFS_PARM0);     
  samp = G_STRING(OFS_PARM1);
  vol = G_FLOAT(OFS_PARM2);
  attenuation = G_FLOAT(OFS_PARM3);
  
// check to see if samp was properly precached
  for (soundnum=0, check = sv.sound_precache ; *check ; check++, soundnum++)
    if (!strcmp(*check,samp))
      break;
      
  if (!*check)
  {
    Con_Printf ("no precache: %s\n", samp);
    return;
  }

// add an svc_spawnambient command to the level signon packet

  MSG_WriteByte (&sv.signon,svc_spawnstaticsound);
  for (i=0 ; i<3 ; i++)
    MSG_WriteCoord(&sv.signon, pos[i]);

  MSG_WriteByte (&sv.signon, soundnum);

  MSG_WriteByte (&sv.signon, vol*255);
  MSG_WriteByte (&sv.signon, attenuation*64);

}

/*
=================
PF_sound

Each entity can have eight independant sound sources, like voice,
weapon, feet, etc.

Channel 0 is an auto-allocate channel, the others override anything
allready running on that entity/channel pair.

An attenuation of 0 will play full volume everywhere in the level.
Larger attenuations will drop off.

=================
*/
void PF_sound (void)
{
  char    *sample;
  int     channel;
  edict_t   *entity;
  int     volume;
  float attenuation;
    
  entity = G_EDICT(OFS_PARM0);
  channel = G_FLOAT(OFS_PARM1);
  sample = G_STRING(OFS_PARM2);
  volume = G_FLOAT(OFS_PARM3) * 255;
  attenuation = G_FLOAT(OFS_PARM4);
  
  SV_StartSound (entity, channel, sample, volume, attenuation);
}

/*
=================
PF_break

break()
=================
*/
void PF_break (void)
{
Con_Printf ("break statement\n");
*(int *)-4 = 0; // dump to debugger
//  PR_RunError ("break statement");
}

/*
=================
PF_traceline

Used for use tracing and shot targeting
Traces are blocked by bbox and exact bsp entityes, and also slide box entities
if the tryents flag is set.

traceline (vector1, vector2, tryents)
=================
*/
void PF_traceline (void)
{
  float *v1, *v2;
  trace_t trace;
  int   nomonsters;
  edict_t *ent;

  v1 = G_VECTOR(OFS_PARM0);
  v2 = G_VECTOR(OFS_PARM1);
  nomonsters = G_FLOAT(OFS_PARM2);
  ent = G_EDICT(OFS_PARM3);

  trace = SV_Move (v1, vec3_origin, vec3_origin, v2, nomonsters, ent);

  pr_global_struct->trace_allsolid = trace.allsolid;
  pr_global_struct->trace_startsolid = trace.startsolid;
  pr_global_struct->trace_fraction = trace.fraction;
  pr_global_struct->trace_inwater = trace.inwater;
  pr_global_struct->trace_inopen = trace.inopen;
  VectorCopy (trace.endpos, pr_global_struct->trace_endpos);
  VectorCopy (trace.plane.normal, pr_global_struct->trace_plane_normal);
  pr_global_struct->trace_plane_dist =  trace.plane.dist; 
  if (trace.ent)
    pr_global_struct->trace_ent = EDICT_TO_PROG(trace.ent);
  else
    pr_global_struct->trace_ent = EDICT_TO_PROG(sv.edicts);
}

/*
=================
PF_checkpos

Returns true if the given entity can move to the given position from it's
current position by walking or rolling.
FIXME: make work...
scalar checkpos (entity, vector)
=================
*/
void PF_checkpos (void)
{
}

//============================================================================

byte  checkpvs[MAX_MAP_LEAFS/8];

int PF_newcheckclient (int check)
{
  int   i;
  byte  *pvs;
  edict_t *ent;
  mleaf_t *leaf;
  vec3_t  org;

// cycle to the next one

  if (check < 1)
    check = 1;
  if (check > MAX_CLIENTS)
    check = MAX_CLIENTS;

  if (check == MAX_CLIENTS)
    i = 1;
  else
    i = check + 1;

  for ( ;  ; i++)
  {
    if (i == MAX_CLIENTS+1)
      i = 1;

    ent = EDICT_NUM(i);

    if (i == check)
      break;  // didn't find anything else

    if (ent->free)
      continue;
    if (ent->v.health <= 0)
      continue;
    if ((int)ent->v.flags & FL_NOTARGET)
      continue;

  // anything that is a client, or has a client as an enemy
    break;
  }

// get the PVS for the entity
  VectorAdd (ent->v.origin, ent->v.view_ofs, org);
  leaf = Mod_PointInLeaf (org, sv.worldmodel);
  pvs = Mod_LeafPVS (leaf, sv.worldmodel);
  memcpy (checkpvs, pvs, (sv.worldmodel->numleafs+7)>>3 );

  return i;
}

/*
=================
PF_checkclient

Returns a client (or object that has a client enemy) that would be a
valid target.

If there are more than one valid options, they are cycled each frame

If (self.origin + self.viewofs) is not in the PVS of the current target,
it is not returned at all.

name checkclient ()
=================
*/
#define MAX_CHECK 16
int c_invis, c_notvis;
void PF_checkclient (void)
{
  edict_t *ent, *self;
  mleaf_t *leaf;
  int   l;
  vec3_t  view;
  
// find a new check if on a new frame
  if (sv.time - sv.lastchecktime >= 0.1)
  {
    sv.lastcheck = PF_newcheckclient (sv.lastcheck);
    sv.lastchecktime = sv.time;
  }

// return check if it might be visible  
  ent = EDICT_NUM(sv.lastcheck);
  if (ent->free || ent->v.health <= 0)
  {
    RETURN_EDICT(sv.edicts);
    return;
  }

// if current entity can't possibly see the check entity, return 0
  self = PROG_TO_EDICT(pr_global_struct->self);
  VectorAdd (self->v.origin, self->v.view_ofs, view);
  leaf = Mod_PointInLeaf (view, sv.worldmodel);
  l = (leaf - sv.worldmodel->leafs) - 1;
  if ( (l<0) || !(checkpvs[l>>3] & (1<<(l&7)) ) )
  {
c_notvis++;
    RETURN_EDICT(sv.edicts);
    return;
  }

// might be able to see it
c_invis++;
  RETURN_EDICT(ent);
}

//============================================================================


/*
=================
PF_stuffcmd

Sends text over to the client's execution buffer

stuffcmd (clientent, value)
=================
*/
void PF_stuffcmd (void)
{
  int   entnum;
  char  *str;
  client_t  *cl;
  
  entnum = G_EDICTNUM(OFS_PARM0);
  if (entnum < 1 || entnum > MAX_CLIENTS)
    PR_RunError ("Parm 0 not a client");
  str = G_STRING(OFS_PARM1);  
  
  cl = &svs.clients[entnum-1];

  if (strcmp(str, "disconnect\n") == 0) {
    // so long and thanks for all the fish
    cl->drop = true;
    return;
  }

  ClientReliableWrite_Begin (cl, svc_stufftext, 2+strlen(str));
  ClientReliableWrite_String (cl, str);
}

/*
=================
PF_localcmd

Sends text over to the client's execution buffer

localcmd (string)
=================
*/
void PF_localcmd (void)
{
  char  *str;
  
  str = G_STRING(OFS_PARM0);  
  Cbuf_AddText (str);
}

/*
=================
PF_cvar

float cvar (string)
=================
*/
void PF_cvar (void)
{
  char  *str;
  
  str = G_STRING(OFS_PARM0);
  
  G_FLOAT(OFS_RETURN) = Cvar_VariableValue (str);
}

/*
=================
PF_cvar_set

float cvar (string)
=================
*/
void PF_cvar_set (void)
{
  char  *var, *val;
  
  var = G_STRING(OFS_PARM0);
  val = G_STRING(OFS_PARM1);
  
  Cvar_Set (var, val);
}

/*
=================
PF_findradius

Returns a chain of entities that have origins within a spherical area

findradius (origin, radius)
=================
*/
void PF_findradius (void)
{
  edict_t *ent, *chain;
  float rad;
  float *org;
  vec3_t  eorg;
  int   i, j;

  chain = (edict_t *)sv.edicts;
  
  org = G_VECTOR(OFS_PARM0);
  rad = G_FLOAT(OFS_PARM1);

  ent = NEXT_EDICT(sv.edicts);
  for (i=1 ; i<sv.num_edicts ; i++, ent = NEXT_EDICT(ent))
  {
    if (ent->free)
      continue;
    if (ent->v.solid == SOLID_NOT)
      continue;
    for (j=0 ; j<3 ; j++)
      eorg[j] = org[j] - (ent->v.origin[j] + (ent->v.mins[j] + ent->v.maxs[j])*0.5);      
    if (Length(eorg) > rad)
      continue;
      
    ent->v.chain = EDICT_TO_PROG(chain);
    chain = ent;
  }

  RETURN_EDICT(chain);
}


/*
=========
PF_dprint
=========
*/
void PF_dprint (void)
{
  Con_Printf ("%s",PF_VarString(0));
}

char  pr_string_temp[128];

void PF_ftos (void)
{
  float v;
  v = G_FLOAT(OFS_PARM0);
  
  if (v == (int)v)
    sprintf (pr_string_temp, "%d",(int)v);
  else
    sprintf (pr_string_temp, "%5.1f",v);
  G_INT(OFS_RETURN) = PR_SetString(pr_string_temp);
}

void PF_fabs (void)
{
  float v;
  v = G_FLOAT(OFS_PARM0);
  G_FLOAT(OFS_RETURN) = fabs(v);
}

void PF_vtos (void)
{
  sprintf (pr_string_temp, "'%5.1f %5.1f %5.1f'", G_VECTOR(OFS_PARM0)[0], G_VECTOR(OFS_PARM0)[1], G_VECTOR(OFS_PARM0)[2]);
  G_INT(OFS_RETURN) = PR_SetString(pr_string_temp);
}

void PF_Spawn (void)
{
  edict_t *ed;
  ed = ED_Alloc();
  RETURN_EDICT(ed);
}

void PF_Remove (void)
{
  edict_t *ed;
  
  ed = G_EDICT(OFS_PARM0);
  ED_Free (ed);
}


// entity (entity start, .string field, string match) find = #5;
void PF_Find (void)
{
  int   e;  
  int   f;
  char  *s, *t;
  edict_t *ed;
  
  e = G_EDICTNUM(OFS_PARM0);
  f = G_INT(OFS_PARM1);
  s = G_STRING(OFS_PARM2);
  if (!s)
    PR_RunError ("PF_Find: bad search string");
    
  for (e++ ; e < sv.num_edicts ; e++)
  {
    ed = EDICT_NUM(e);
    if (ed->free)
      continue;
    t = E_STRING(ed,f);
    if (!t)
      continue;
    if (!strcmp(t,s))
    {
      RETURN_EDICT(ed);
      return;
    }
  }
  
  RETURN_EDICT(sv.edicts);
}

void PR_CheckEmptyString (char *s)
{
  if (s[0] <= ' ')
    PR_RunError ("Bad string");
}

void PF_precache_file (void)
{ // precache_file is only used to copy files with qcc, it does nothing
  G_INT(OFS_RETURN) = G_INT(OFS_PARM0);
}

void PF_precache_sound (void)
{
  char  *s;
  int   i;
  
  if (sv.state != ss_loading)
    PR_RunError ("PF_Precache_*: Precache can only be done in spawn functions");
    
  s = G_STRING(OFS_PARM0);
  G_INT(OFS_RETURN) = G_INT(OFS_PARM0);
  PR_CheckEmptyString (s);
  
  for (i=0 ; i<MAX_SOUNDS ; i++)
  {
    if (!sv.sound_precache[i])
    {
      sv.sound_precache[i] = s;
      return;
    }
    if (!strcmp(sv.sound_precache[i], s))
      return;
  }
  PR_RunError ("PF_precache_sound: overflow");
}

void PF_precache_model (void)
{
  char  *s;
  int   i;
  
  if (sv.state != ss_loading)
    PR_RunError ("PF_Precache_*: Precache can only be done in spawn functions");
    
  s = G_STRING(OFS_PARM0);
  G_INT(OFS_RETURN) = G_INT(OFS_PARM0);
  PR_CheckEmptyString (s);

  for (i=0 ; i<MAX_MODELS ; i++)
  {
    if (!sv.model_precache[i])
    {
      sv.model_precache[i] = s;
      return;
    }
    if (!strcmp(sv.model_precache[i], s))
      return;
  }
  PR_RunError ("PF_precache_model: overflow");
}


void PF_coredump (void)
{
  ED_PrintEdicts ();
}

void PF_traceon (void)
{
  pr_trace = true;
}

void PF_traceoff (void)
{
  pr_trace = false;
}

void PF_eprint (void)
{
  ED_PrintNum (G_EDICTNUM(OFS_PARM0));
}

/*
===============
PF_walkmove

float(float yaw, float dist) walkmove
===============
*/
void PF_walkmove (void)
{
  edict_t *ent;
  float yaw, dist;
  vec3_t  move;
  dfunction_t *oldf;
  int   oldself;
  
  ent = PROG_TO_EDICT(pr_global_struct->self);
  yaw = G_FLOAT(OFS_PARM0);
  dist = G_FLOAT(OFS_PARM1);
  
  if ( !( (int)ent->v.flags & (FL_ONGROUND|FL_FLY|FL_SWIM) ) )
  {
    G_FLOAT(OFS_RETURN) = 0;
    return;
  }

  yaw = yaw*M_PI*2 / 360;
  
  move[0] = cos(yaw)*dist;
  move[1] = sin(yaw)*dist;
  move[2] = 0;

// save program state, because SV_movestep may call other progs
  oldf = pr_xfunction;
  oldself = pr_global_struct->self;
  
  G_FLOAT(OFS_RETURN) = SV_movestep(ent, move, true);
  
  
// restore program state
  pr_xfunction = oldf;
  pr_global_struct->self = oldself;
}

/*
===============
PF_droptofloor

void() droptofloor
===============
*/
void PF_droptofloor (void)
{
  edict_t   *ent;
  vec3_t    end;
  trace_t   trace;
  
  ent = PROG_TO_EDICT(pr_global_struct->self);

  VectorCopy (ent->v.origin, end);
  end[2] -= 256;
  
  trace = SV_Move (ent->v.origin, ent->v.mins, ent->v.maxs, end, false, ent);

  if (trace.fraction == 1 || trace.allsolid)
    G_FLOAT(OFS_RETURN) = 0;
  else
  {
    VectorCopy (trace.endpos, ent->v.origin);
    SV_LinkEdict (ent, false);
    ent->v.flags = (int)ent->v.flags | FL_ONGROUND;
    ent->v.groundentity = EDICT_TO_PROG(trace.ent);
    G_FLOAT(OFS_RETURN) = 1;
  }
}

/*
===============
PF_lightstyle

void(float style, string value) lightstyle
===============
*/
void PF_lightstyle (void)
{
  int   style;
  char  *val;
  client_t  *client;
  int     j;
  
  style = G_FLOAT(OFS_PARM0);
  val = G_STRING(OFS_PARM1);

// change the string in sv
  sv.lightstyles[style] = val;
  
// send message to all clients on this server
  if (sv.state != ss_active)
    return;
  
  for (j=0, client = svs.clients ; j<MAX_CLIENTS ; j++, client++)
    if ( client->state == cs_spawned )
    {
      ClientReliableWrite_Begin (client, svc_lightstyle, strlen(val)+3);
      ClientReliableWrite_Char (client, style);
      ClientReliableWrite_String (client, val);
    }
}

void PF_rint (void)
{
  float f;
  f = G_FLOAT(OFS_PARM0);
  if (f > 0)
    G_FLOAT(OFS_RETURN) = (int)(f + 0.5);
  else
    G_FLOAT(OFS_RETURN) = (int)(f - 0.5);
}
void PF_floor (void)
{
  G_FLOAT(OFS_RETURN) = floor(G_FLOAT(OFS_PARM0));
}
void PF_ceil (void)
{
  G_FLOAT(OFS_RETURN) = ceil(G_FLOAT(OFS_PARM0));
}


/*
=============
PF_checkbottom
=============
*/
void PF_checkbottom (void)
{
  edict_t *ent;
  
  ent = G_EDICT(OFS_PARM0);

  G_FLOAT(OFS_RETURN) = SV_CheckBottom (ent);
}

/*
=============
PF_pointcontents
=============
*/
void PF_pointcontents (void)
{
  float *v;
  
  v = G_VECTOR(OFS_PARM0);

  G_FLOAT(OFS_RETURN) = SV_PointContents (v); 
}

/*
=============
PF_nextent

entity nextent(entity)
=============
*/
void PF_nextent (void)
{
  int   i;
  edict_t *ent;
  
  i = G_EDICTNUM(OFS_PARM0);
  while (1)
  {
    i++;
    if (i == sv.num_edicts)
    {
      RETURN_EDICT(sv.edicts);
      return;
    }
    ent = EDICT_NUM(i);
    if (!ent->free)
    {
      RETURN_EDICT(ent);
      return;
    }
  }
}

/*
=============
PF_aim

Pick a vector for the player to shoot along
vector aim(entity, missilespeed)
=============
*/
//cvar_t  sv_aim = {"sv_aim", "0.93"};
cvar_t  sv_aim = {"sv_aim", "2"};
void PF_aim (void)
{
  edict_t *ent, *check, *bestent;
  vec3_t  start, dir, end, bestdir;
  int   i, j;
  trace_t tr;
  float dist, bestdist;
  float speed;
  char  *noaim;

  ent = G_EDICT(OFS_PARM0);
  speed = G_FLOAT(OFS_PARM1);

  VectorCopy (ent->v.origin, start);
  start[2] += 20;

// noaim option
  i = NUM_FOR_EDICT(ent);
  if (i>0 && i<MAX_CLIENTS)
  {
    noaim = Info_ValueForKey (svs.clients[i-1].userinfo, "noaim");
    if (atoi(noaim) > 0)
    {
      VectorCopy (pr_global_struct->v_forward, G_VECTOR(OFS_RETURN));
      return;
    }
  }

// try sending a trace straight
  VectorCopy (pr_global_struct->v_forward, dir);
  VectorMA (start, 2048, dir, end);
  tr = SV_Move (start, vec3_origin, vec3_origin, end, false, ent);
  if (tr.ent && tr.ent->v.takedamage == DAMAGE_AIM
  && (!teamplay.value || ent->v.team <=0 || ent->v.team != tr.ent->v.team) )
  {
    VectorCopy (pr_global_struct->v_forward, G_VECTOR(OFS_RETURN));
    return;
  }


// try all possible entities
  VectorCopy (dir, bestdir);
  bestdist = sv_aim.value;
  bestent = NULL;
  
  check = NEXT_EDICT(sv.edicts);
  for (i=1 ; i<sv.num_edicts ; i++, check = NEXT_EDICT(check) )
  {
    if (check->v.takedamage != DAMAGE_AIM)
      continue;
    if (check == ent)
      continue;
    if (teamplay.value && ent->v.team > 0 && ent->v.team == check->v.team)
      continue; // don't aim at teammate
    for (j=0 ; j<3 ; j++)
      end[j] = check->v.origin[j]
      + 0.5*(check->v.mins[j] + check->v.maxs[j]);
    VectorSubtract (end, start, dir);
    VectorNormalize (dir);
    dist = DotProduct (dir, pr_global_struct->v_forward);
    if (dist < bestdist)
      continue; // to far to turn
    tr = SV_Move (start, vec3_origin, vec3_origin, end, false, ent);
    if (tr.ent == check)
    { // can shoot at this one
      bestdist = dist;
      bestent = check;
    }
  }
  
  if (bestent)
  {
    VectorSubtract (bestent->v.origin, ent->v.origin, dir);
    dist = DotProduct (dir, pr_global_struct->v_forward);
    VectorScale (pr_global_struct->v_forward, dist, end);
    end[2] = dir[2];
    VectorNormalize (end);
    VectorCopy (end, G_VECTOR(OFS_RETURN)); 
  }
  else
  {
    VectorCopy (bestdir, G_VECTOR(OFS_RETURN));
  }
}

/*
==============
PF_changeyaw

This was a major timewaster in progs, so it was converted to C
==============
*/
void PF_changeyaw (void)
{
  edict_t   *ent;
  float   ideal, current, move, speed;
  
  ent = PROG_TO_EDICT(pr_global_struct->self);
  current = anglemod( ent->v.angles[1] );
  ideal = ent->v.ideal_yaw;
  speed = ent->v.yaw_speed;
  
  if (current == ideal)
    return;
  move = ideal - current;
  if (ideal > current)
  {
    if (move >= 180)
      move = move - 360;
  }
  else
  {
    if (move <= -180)
      move = move + 360;
  }
  if (move > 0)
  {
    if (move > speed)
      move = speed;
  }
  else
  {
    if (move < -speed)
      move = -speed;
  }
  
  ent->v.angles[1] = anglemod (current + move);
}

/*
===============================================================================

MESSAGE WRITING

===============================================================================
*/

#define MSG_BROADCAST 0   // unreliable to all
#define MSG_ONE     1   // reliable to one (msg_entity)
#define MSG_ALL     2   // reliable to all
#define MSG_INIT    3   // write to the init string
#define MSG_MULTICAST 4   // for multicast()

sizebuf_t *WriteDest (void)
{
  int   entnum;
  int   dest;
  edict_t *ent;

  dest = G_FLOAT(OFS_PARM0);
  switch (dest)
  {
  case MSG_BROADCAST:
    return &sv.datagram;
  
  case MSG_ONE:
    SV_Error("Shouldn't be at MSG_ONE");
#if 0
    ent = PROG_TO_EDICT(pr_global_struct->msg_entity);
    entnum = NUM_FOR_EDICT(ent);
    if (entnum < 1 || entnum > MAX_CLIENTS)
      PR_RunError ("WriteDest: not a client");
    return &svs.clients[entnum-1].netchan.message;
#endif
    
  case MSG_ALL:
    return &sv.reliable_datagram;
  
  case MSG_INIT:
    if (sv.state != ss_loading)
      PR_RunError ("PF_Write_*: MSG_INIT can only be written in spawn functions");
    return &sv.signon;

  case MSG_MULTICAST:
    return &sv.multicast;

  default:
    PR_RunError ("WriteDest: bad destination");
    break;
  }
  
  return NULL;
}

static client_t *Write_GetClient(void)
{
  int   entnum;
  edict_t *ent;

  ent = PROG_TO_EDICT(pr_global_struct->msg_entity);
  entnum = NUM_FOR_EDICT(ent);
  if (entnum < 1 || entnum > MAX_CLIENTS)
    PR_RunError ("WriteDest: not a client");
  return &svs.clients[entnum-1];
}


void PF_WriteByte (void)
{
  if (G_FLOAT(OFS_PARM0) == MSG_ONE) {
    client_t *cl = Write_GetClient();
    ClientReliableCheckBlock(cl, 1);
    ClientReliableWrite_Byte(cl, G_FLOAT(OFS_PARM1));
  } else
    MSG_WriteByte (WriteDest(), G_FLOAT(OFS_PARM1));
}

void PF_WriteChar (void)
{
  if (G_FLOAT(OFS_PARM0) == MSG_ONE) {
    client_t *cl = Write_GetClient();
    ClientReliableCheckBlock(cl, 1);
    ClientReliableWrite_Char(cl, G_FLOAT(OFS_PARM1));
  } else
    MSG_WriteChar (WriteDest(), G_FLOAT(OFS_PARM1));
}

void PF_WriteShort (void)
{
  if (G_FLOAT(OFS_PARM0) == MSG_ONE) {
    client_t *cl = Write_GetClient();
    ClientReliableCheckBlock(cl, 2);
    ClientReliableWrite_Short(cl, G_FLOAT(OFS_PARM1));
  } else
    MSG_WriteShort (WriteDest(), G_FLOAT(OFS_PARM1));
}

void PF_WriteLong (void)
{
  if (G_FLOAT(OFS_PARM0) == MSG_ONE) {
    client_t *cl = Write_GetClient();
    ClientReliableCheckBlock(cl, 4);
    ClientReliableWrite_Long(cl, G_FLOAT(OFS_PARM1));
  } else
    MSG_WriteLong (WriteDest(), G_FLOAT(OFS_PARM1));
}

void PF_WriteAngle (void)
{
  if (G_FLOAT(OFS_PARM0) == MSG_ONE) {
    client_t *cl = Write_GetClient();
    ClientReliableCheckBlock(cl, 1);
    ClientReliableWrite_Angle(cl, G_FLOAT(OFS_PARM1));
  } else
    MSG_WriteAngle (WriteDest(), G_FLOAT(OFS_PARM1));
}

void PF_WriteCoord (void)
{
  if (G_FLOAT(OFS_PARM0) == MSG_ONE) {
    client_t *cl = Write_GetClient();
    ClientReliableCheckBlock(cl, 2);
    ClientReliableWrite_Coord(cl, G_FLOAT(OFS_PARM1));
  } else
    MSG_WriteCoord (WriteDest(), G_FLOAT(OFS_PARM1));
}

void PF_WriteString (void)
{
  if (G_FLOAT(OFS_PARM0) == MSG_ONE) {
    client_t *cl = Write_GetClient();
    ClientReliableCheckBlock(cl, 1+strlen(G_STRING(OFS_PARM1)));
    ClientReliableWrite_String(cl, G_STRING(OFS_PARM1));
  } else
    MSG_WriteString (WriteDest(), G_STRING(OFS_PARM1));
}


void PF_WriteEntity (void)
{
  if (G_FLOAT(OFS_PARM0) == MSG_ONE) {
    client_t *cl = Write_GetClient();
    ClientReliableCheckBlock(cl, 2);
    ClientReliableWrite_Short(cl, G_EDICTNUM(OFS_PARM1));
  } else
    MSG_WriteShort (WriteDest(), G_EDICTNUM(OFS_PARM1));
}

//=============================================================================

int SV_ModelIndex (char *name);

void PF_makestatic (void)
{
  edict_t *ent;
  int   i;
  
  ent = G_EDICT(OFS_PARM0);

  MSG_WriteByte (&sv.signon,svc_spawnstatic);

  MSG_WriteByte (&sv.signon, SV_ModelIndex(PR_GetString(ent->v.model)));

  MSG_WriteByte (&sv.signon, ent->v.frame);
  MSG_WriteByte (&sv.signon, ent->v.colormap);
  MSG_WriteByte (&sv.signon, ent->v.skin);
  for (i=0 ; i<3 ; i++)
  {
    MSG_WriteCoord(&sv.signon, ent->v.origin[i]);
    MSG_WriteAngle(&sv.signon, ent->v.angles[i]);
  }

// throw the entity away now
  ED_Free (ent);
}

//=============================================================================

/*
==============
PF_setspawnparms
==============
*/
void PF_setspawnparms (void)
{
  edict_t *ent;
  int   i;
  client_t  *client;

  ent = G_EDICT(OFS_PARM0);
  i = NUM_FOR_EDICT(ent);
  if (i < 1 || i > MAX_CLIENTS)
    PR_RunError ("Entity is not a client");

  // copy spawn parms out of the client_t
  client = svs.clients + (i-1);

  for (i=0 ; i< NUM_SPAWN_PARMS ; i++)
    (&pr_global_struct->parm1)[i] = client->spawn_parms[i];
}

/*
==============
PF_changelevel
==============
*/
void PF_changelevel (void)
{
  char  *s;
  static  int last_spawncount;

// make sure we don't issue two changelevels
  if (svs.spawncount == last_spawncount)
    return;
  last_spawncount = svs.spawncount;
  
  s = G_STRING(OFS_PARM0);
  Cbuf_AddText (va("map %s\n",s));
}


/*
==============
PF_logfrag

logfrag (killer, killee)
==============
*/
void PF_logfrag (void)
{
  edict_t *ent1, *ent2;
  int   e1, e2;
  char  *s;

  ent1 = G_EDICT(OFS_PARM0);
  ent2 = G_EDICT(OFS_PARM1);

  e1 = NUM_FOR_EDICT(ent1);
  e2 = NUM_FOR_EDICT(ent2);
  
  if (e1 < 1 || e1 > MAX_CLIENTS
  || e2 < 1 || e2 > MAX_CLIENTS)
    return;
  
  s = va("\\%s\\%s\\\n",svs.clients[e1-1].name, svs.clients[e2-1].name);

  SZ_Print (&svs.log[svs.logsequence&1], s);
  if (sv_fraglogfile) {
    fprintf (sv_fraglogfile, s);
    fflush (sv_fraglogfile);
  }
}


/*
==============
PF_infokey

string(entity e, string key) infokey
==============
*/
void PF_infokey (void)
{
  edict_t *e;
  int   e1;
  char  *value;
  char  *key;
  static  char ov[256];

  e = G_EDICT(OFS_PARM0);
  e1 = NUM_FOR_EDICT(e);
  key = G_STRING(OFS_PARM1);

  if (e1 == 0) {
    if ((value = Info_ValueForKey (svs.info, key)) == NULL ||
      !*value)
      value = Info_ValueForKey(localinfo, key);
  } else if (e1 <= MAX_CLIENTS) {
    if (!strcmp(key, "ip"))
      value = strcpy(ov, NET_BaseAdrToString (svs.clients[e1-1].netchan.remote_address));
    else if (!strcmp(key, "ping")) {
      int ping = SV_CalcPing (&svs.clients[e1-1]);
      sprintf(ov, "%d", ping);
      value = ov;
    } else
      value = Info_ValueForKey (svs.clients[e1-1].userinfo, key);
  } else
    value = "";

  RETURN_STRING(value);
}

/*
==============
PF_stof

float(string s) stof
==============
*/
void PF_stof (void)
{
  char  *s;

  s = G_STRING(OFS_PARM0);

  G_FLOAT(OFS_RETURN) = atof(s);
}


/*
==============
PF_multicast

void(vector where, float set) multicast
==============
*/
void PF_multicast (void)
{
  float *o;
  int   to;

  o = G_VECTOR(OFS_PARM0);
  to = G_FLOAT(OFS_PARM1);

  SV_Multicast (o, to);
}


void PF_Fixme (void)
{
  PR_RunError ("unimplemented bulitin");
}



builtin_t pr_builtin[] =
{
  PF_Fixme,
PF_makevectors, // void(entity e) makevectors     = #1;
PF_setorigin, // void(entity e, vector o) setorigin = #2;
PF_setmodel,  // void(entity e, string m) setmodel  = #3;
PF_setsize, // void(entity e, vector min, vector max) setsize = #4;
PF_Fixme, // void(entity e, vector min, vector max) setabssize = #5;
PF_break, // void() break           = #6;
PF_random,  // float() random           = #7;
PF_sound, // void(entity e, float chan, string samp) sound = #8;
PF_normalize, // vector(vector v) normalize     = #9;
PF_error, // void(string e) error       = #10;
PF_objerror,  // void(string e) objerror        = #11;
PF_vlen,  // float(vector v) vlen       = #12;
PF_vectoyaw,  // float(vector v) vectoyaw   = #13;
PF_Spawn, // entity() spawn           = #14;
PF_Remove,  // void(entity e) remove        = #15;
PF_traceline, // float(vector v1, vector v2, float tryents) traceline = #16;
PF_checkclient, // entity() clientlist          = #17;
PF_Find,  // entity(entity start, .string fld, string match) find = #18;
PF_precache_sound,  // void(string s) precache_sound    = #19;
PF_precache_model,  // void(string s) precache_model    = #20;
PF_stuffcmd,  // void(entity client, string s)stuffcmd = #21;
PF_findradius,  // entity(vector org, float rad) findradius = #22;
PF_bprint,  // void(string s) bprint        = #23;
PF_sprint,  // void(entity client, string s) sprint = #24;
PF_dprint,  // void(string s) dprint        = #25;
PF_ftos,  // void(string s) ftos        = #26;
PF_vtos,  // void(string s) vtos        = #27;
PF_coredump,
PF_traceon,
PF_traceoff,
PF_eprint,  // void(entity e) debug print an entire entity
PF_walkmove, // float(float yaw, float dist) walkmove
PF_Fixme, // float(float yaw, float dist) walkmove
PF_droptofloor,
PF_lightstyle,
PF_rint,
PF_floor,
PF_ceil,
PF_Fixme,
PF_checkbottom,
PF_pointcontents,
PF_Fixme,
PF_fabs,
PF_aim,
PF_cvar,
PF_localcmd,
PF_nextent,
PF_Fixme,
PF_changeyaw,
PF_Fixme,
PF_vectoangles,

PF_WriteByte,
PF_WriteChar,
PF_WriteShort,
PF_WriteLong,
PF_WriteCoord,
PF_WriteAngle,
PF_WriteString,
PF_WriteEntity,

PF_Fixme,
PF_Fixme,
PF_Fixme,
PF_Fixme,
PF_Fixme,
PF_Fixme,
PF_Fixme,

SV_MoveToGoal,
PF_precache_file,
PF_makestatic,

PF_changelevel,
PF_Fixme,

PF_cvar_set,
PF_centerprint,

PF_ambientsound,

PF_precache_model,
PF_precache_sound,    // precache_sound2 is different only for qcc
PF_precache_file,

PF_setspawnparms,

PF_logfrag,

PF_infokey,
PF_stof,
PF_multicast
};

builtin_t *pr_builtins = pr_builtin;
int pr_numbuiltins = sizeof(pr_builtin)/sizeof(pr_builtin[0]);