prvm_edict.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // AK new vm
  21
  22 #include "quakedef.h"
  23 #include "progsvm.h"
  24
  25 prvm_prog_t *prog;
  26
  27 static prvm_prog_t prog_list[PRVM_MAXPROGS];
  28
  29 int             prvm_type_size[8] = {1,sizeof(string_t)/4,1,3,1,1,sizeof(func_t)/4,sizeof(void *)/4};
  30
  31 ddef_t *PRVM_ED_FieldAtOfs(int ofs);
  32 qboolean PRVM_ED_ParseEpair(prvm_edict_t *ent, ddef_t *key, const char *s);
  33
  34 // LordHavoc: optional runtime bounds checking (speed drain, but worth it for security, on by default - breaks most QCCX features (used by CRMod and others))
  35 cvar_t prvm_boundscheck = {0, "prvm_boundscheck", "1", "enables detection of out of bounds memory access in the QuakeC code being run (in other words, prevents really exceedingly bad QuakeC code from doing nasty things to your computer)"};
  36 // LordHavoc: prints every opcode as it executes - warning: this is significant spew
  37 cvar_t prvm_traceqc = {0, "prvm_traceqc", "0", "prints every QuakeC statement as it is executed (only for really thorough debugging!)"};
  38 // LordHavoc: counts usage of each QuakeC statement
  39 cvar_t prvm_statementprofiling = {0, "prvm_statementprofiling", "0", "counts how many times each QuakeC statement has been executed, these counts are displayed in prvm_printfunction output (if enabled)"};
  40
  41 extern sizebuf_t vm_tempstringsbuf;
  42
  43 //============================================================================
  44 // mempool handling
  45
  46 /*
  47 ===============
  48 PRVM_MEM_Alloc
  49 ===============
  50 */
  51 void PRVM_MEM_Alloc(void)
  52 {
  53         int i;
  54
  55         // reserve space for the null entity aka world
  56         // check bound of max_edicts
  57         prog->max_edicts = bound(1 + prog->reserved_edicts, prog->max_edicts, prog->limit_edicts);
  58         prog->num_edicts = bound(1 + prog->reserved_edicts, prog->num_edicts, prog->max_edicts);
  59
  60         // edictprivate_size has to be min as big prvm_edict_private_t
  61         prog->edictprivate_size = max(prog->edictprivate_size,(int)sizeof(prvm_edict_private_t));
  62
  63         // alloc edicts
  64         prog->edicts = (prvm_edict_t *)Mem_Alloc(prog->progs_mempool,prog->limit_edicts * sizeof(prvm_edict_t));
  65
  66         // alloc edict private space
  67         prog->edictprivate = Mem_Alloc(prog->progs_mempool, prog->max_edicts * prog->edictprivate_size);
  68
  69         // alloc edict fields
  70         prog->edictsfields = Mem_Alloc(prog->progs_mempool, prog->max_edicts * prog->edict_size);
  71
  72         // set edict pointers
  73         for(i = 0; i < prog->max_edicts; i++)
  74         {
  75                 prog->edicts[i].priv.required = (prvm_edict_private_t *)((unsigned char  *)prog->edictprivate + i * prog->edictprivate_size);
  76                 prog->edicts[i].fields.vp = (void*)((unsigned char *)prog->edictsfields + i * prog->edict_size);
  77         }
  78 }
  79
  80 /*
  81 ===============
  82 PRVM_MEM_IncreaseEdicts
  83 ===============
  84 */
  85 void PRVM_MEM_IncreaseEdicts(void)
  86 {
  87         int             i;
  88         int             oldmaxedicts = prog->max_edicts;
  89         void    *oldedictsfields = prog->edictsfields;
  90         void    *oldedictprivate = prog->edictprivate;
  91
  92         if(prog->max_edicts >= prog->limit_edicts)
  93                 return;
  94
  95         PRVM_GCALL(begin_increase_edicts)();
  96
  97         // increase edicts
  98         prog->max_edicts = min(prog->max_edicts + 256, prog->limit_edicts);
  99
 100         prog->edictsfields = Mem_Alloc(prog->progs_mempool, prog->max_edicts * prog->edict_size);
 101         prog->edictprivate = Mem_Alloc(prog->progs_mempool, prog->max_edicts * prog->edictprivate_size);
 102
 103         memcpy(prog->edictsfields, oldedictsfields, oldmaxedicts * prog->edict_size);
 104         memcpy(prog->edictprivate, oldedictprivate, oldmaxedicts * prog->edictprivate_size);
 105
 106         //set e and v pointers
 107         for(i = 0; i < prog->max_edicts; i++)
 108         {
 109                 prog->edicts[i].priv.required  = (prvm_edict_private_t *)((unsigned char  *)prog->edictprivate + i * prog->edictprivate_size);
 110                 prog->edicts[i].fields.vp = (void*)((unsigned char *)prog->edictsfields + i * prog->edict_size);
 111         }
 112
 113         PRVM_GCALL(end_increase_edicts)();
 114
 115         Mem_Free(oldedictsfields);
 116         Mem_Free(oldedictprivate);
 117 }
 118
 119 //============================================================================
 120 // normal prvm
 121
 122 int PRVM_ED_FindFieldOffset(const char *field)
 123 {
 124         ddef_t *d;
 125         d = PRVM_ED_FindField(field);
 126         if (!d)
 127                 return -1;
 128         return d->ofs;
 129 }
 130
 131 int PRVM_ED_FindGlobalOffset(const char *global)
 132 {
 133         ddef_t *d;
 134         d = PRVM_ED_FindGlobal(global);
 135         if (!d)
 136                 return -1;
 137         return d->ofs;
 138 }
 139
 140 func_t PRVM_ED_FindFunctionOffset(const char *function)
 141 {
 142         mfunction_t *f;
 143         f = PRVM_ED_FindFunction(function);
 144         if (!f)
 145                 return 0;
 146         return (func_t)(f - prog->functions);
 147 }
 148
 149 qboolean PRVM_ProgLoaded(int prognr)
 150 {
 151         if(prognr < 0 || prognr >= PRVM_MAXPROGS)
 152                 return FALSE;
 153
 154         return (prog_list[prognr].loaded ? TRUE : FALSE);
 155 }
 156
 157 /*
 158 =================
 159 PRVM_SetProgFromString
 160 =================
 161 */
 162 // perhaps add a return value when the str doesnt exist
 163 qboolean PRVM_SetProgFromString(const char *str)
 164 {
 165         int i = 0;
 166         for(; i < PRVM_MAXPROGS ; i++)
 167                 if(prog_list[i].name && !strcmp(prog_list[i].name,str))
 168                 {
 169                         if(prog_list[i].loaded)
 170                         {
 171                                 prog = &prog_list[i];
 172                                 return TRUE;
 173                         }
 174                         else
 175                         {
 176                                 Con_Printf("%s not loaded !\n",PRVM_NAME);
 177                                 return FALSE;
 178                         }
 179                 }
 180
 181         Con_Printf("Invalid program name %s !\n", str);
 182         return FALSE;
 183 }
 184
 185 /*
 186 =================
 187 PRVM_SetProg
 188 =================
 189 */
 190 void PRVM_SetProg(int prognr)
 191 {
 192         if(0 <= prognr && prognr < PRVM_MAXPROGS)
 193         {
 194                 if(prog_list[prognr].loaded)
 195                         prog = &prog_list[prognr];
 196                 else
 197                         PRVM_ERROR("%i not loaded !", prognr);
 198                 return;
 199         }
 200         PRVM_ERROR("Invalid program number %i", prognr);
 201 }
 202
 203 /*
 204 =================
 205 PRVM_ED_ClearEdict
 206
 207 Sets everything to NULL
 208 =================
 209 */
 210 void PRVM_ED_ClearEdict (prvm_edict_t *e)
 211 {
 212         memset (e->fields.vp, 0, prog->progs->entityfields * 4);
 213         e->priv.required->free = false;
 214
 215         // AK: Let the init_edict function determine if something needs to be initialized
 216         PRVM_GCALL(init_edict)(e);
 217 }
 218
 219 /*
 220 =================
 221 PRVM_ED_Alloc
 222
 223 Either finds a free edict, or allocates a new one.
 224 Try to avoid reusing an entity that was recently freed, because it
 225 can cause the client to think the entity morphed into something else
 226 instead of being removed and recreated, which can cause interpolated
 227 angles and bad trails.
 228 =================
 229 */
 230 prvm_edict_t *PRVM_ED_Alloc (void)
 231 {
 232         int                     i;
 233         prvm_edict_t            *e;
 234
 235         // the client qc dont need maxclients
 236         // thus it doesnt need to use svs.maxclients
 237         // AK:  changed i=svs.maxclients+1
 238         // AK:  changed so the edict 0 wont spawn -> used as reserved/world entity
 239         //              although the menu/client has no world
 240         for (i = prog->reserved_edicts + 1;i < prog->num_edicts;i++)
 241         {
 242                 e = PRVM_EDICT_NUM(i);
 243                 // the first couple seconds of server time can involve a lot of
 244                 // freeing and allocating, so relax the replacement policy
 245                 if (e->priv.required->free && ( e->priv.required->freetime < 2 || prog->globaloffsets.time < 0 || (PRVM_GLOBALFIELDVALUE(prog->globaloffsets.time)->_float - e->priv.required->freetime) > 0.5 ) )
 246                 {
 247                         PRVM_ED_ClearEdict (e);
 248                         return e;
 249                 }
 250         }
 251
 252         if (i == prog->limit_edicts)
 253                 PRVM_ERROR ("%s: PRVM_ED_Alloc: no free edicts",PRVM_NAME);
 254
 255         prog->num_edicts++;
 256         if (prog->num_edicts >= prog->max_edicts)
 257                 PRVM_MEM_IncreaseEdicts();
 258
 259         e = PRVM_EDICT_NUM(i);
 260         PRVM_ED_ClearEdict (e);
 261
 262         return e;
 263 }
 264
 265 /*
 266 =================
 267 PRVM_ED_Free
 268
 269 Marks the edict as free
 270 FIXME: walk all entities and NULL out references to this entity
 271 =================
 272 */
 273 void PRVM_ED_Free (prvm_edict_t *ed)
 274 {
 275         // dont delete the null entity (world) or reserved edicts
 276         if(PRVM_NUM_FOR_EDICT(ed) <= prog->reserved_edicts )
 277                 return;
 278
 279         PRVM_GCALL(free_edict)(ed);
 280
 281         ed->priv.required->free = true;
 282         ed->priv.required->freetime = prog->globaloffsets.time >= 0 ? PRVM_GLOBALFIELDVALUE(prog->globaloffsets.time)->_float : 0;
 283 }
 284
 285 //===========================================================================
 286
 287 /*
 288 ============
 289 PRVM_ED_GlobalAtOfs
 290 ============
 291 */
 292 ddef_t *PRVM_ED_GlobalAtOfs (int ofs)
 293 {
 294         ddef_t          *def;
 295         int                     i;
 296
 297         for (i=0 ; i<prog->progs->numglobaldefs ; i++)
 298         {
 299                 def = &prog->globaldefs[i];
 300                 if (def->ofs == ofs)
 301                         return def;
 302         }
 303         return NULL;
 304 }
 305
 306 /*
 307 ============
 308 PRVM_ED_FieldAtOfs
 309 ============
 310 */
 311 ddef_t *PRVM_ED_FieldAtOfs (int ofs)
 312 {
 313         ddef_t          *def;
 314         int                     i;
 315
 316         for (i=0 ; i<prog->progs->numfielddefs ; i++)
 317         {
 318                 def = &prog->fielddefs[i];
 319                 if (def->ofs == ofs)
 320                         return def;
 321         }
 322         return NULL;
 323 }
 324
 325 /*
 326 ============
 327 PRVM_ED_FindField
 328 ============
 329 */
 330 ddef_t *PRVM_ED_FindField (const char *name)
 331 {
 332         ddef_t *def;
 333         int i;
 334
 335         for (i=0 ; i<prog->progs->numfielddefs ; i++)
 336         {
 337                 def = &prog->fielddefs[i];
 338                 if (!strcmp(PRVM_GetString(def->s_name), name))
 339                         return def;
 340         }
 341         return NULL;
 342 }
 343
 344 /*
 345 ============
 346 PRVM_ED_FindGlobal
 347 ============
 348 */
 349 ddef_t *PRVM_ED_FindGlobal (const char *name)
 350 {
 351         ddef_t *def;
 352         int i;
 353
 354         for (i=0 ; i<prog->progs->numglobaldefs ; i++)
 355         {
 356                 def = &prog->globaldefs[i];
 357                 if (!strcmp(PRVM_GetString(def->s_name), name))
 358                         return def;
 359         }
 360         return NULL;
 361 }
 362
 363
 364 /*
 365 ============
 366 PRVM_ED_FindFunction
 367 ============
 368 */
 369 mfunction_t *PRVM_ED_FindFunction (const char *name)
 370 {
 371         mfunction_t             *func;
 372         int                             i;
 373
 374         for (i=0 ; i<prog->progs->numfunctions ; i++)
 375         {
 376                 func = &prog->functions[i];
 377                 if (!strcmp(PRVM_GetString(func->s_name), name))
 378                         return func;
 379         }
 380         return NULL;
 381 }
 382
 383
 384 /*
 385 ============
 386 PRVM_ValueString
 387
 388 Returns a string describing *data in a type specific manner
 389 =============
 390 */
 391 char *PRVM_ValueString (etype_t type, prvm_eval_t *val)
 392 {
 393         static char line[MAX_INPUTLINE];
 394         ddef_t *def;
 395         mfunction_t *f;
 396         int n;
 397
 398         type = (etype_t)((int) type & ~DEF_SAVEGLOBAL);
 399
 400         switch (type)
 401         {
 402         case ev_string:
 403                 strlcpy (line, PRVM_GetString (val->string), sizeof (line));
 404                 break;
 405         case ev_entity:
 406                 n = val->edict;
 407                 if (n < 0 || n >= prog->limit_edicts)
 408                         sprintf (line, "entity %i (invalid!)", n);
 409                 else
 410                         sprintf (line, "entity %i", n);
 411                 break;
 412         case ev_function:
 413                 f = prog->functions + val->function;
 414                 sprintf (line, "%s()", PRVM_GetString(f->s_name));
 415                 break;
 416         case ev_field:
 417                 def = PRVM_ED_FieldAtOfs ( val->_int );
 418                 sprintf (line, ".%s", PRVM_GetString(def->s_name));
 419                 break;
 420         case ev_void:
 421                 sprintf (line, "void");
 422                 break;
 423         case ev_float:
 424                 // LordHavoc: changed from %5.1f to %10.4f
 425                 sprintf (line, "%10.4f", val->_float);
 426                 break;
 427         case ev_vector:
 428                 // LordHavoc: changed from %5.1f to %10.4f
 429                 sprintf (line, "'%10.4f %10.4f %10.4f'", val->vector[0], val->vector[1], val->vector[2]);
 430                 break;
 431         case ev_pointer:
 432                 sprintf (line, "pointer");
 433                 break;
 434         default:
 435                 sprintf (line, "bad type %i", (int) type);
 436                 break;
 437         }
 438
 439         return line;
 440 }
 441
 442 /*
 443 ============
 444 PRVM_UglyValueString
 445
 446 Returns a string describing *data in a type specific manner
 447 Easier to parse than PR_ValueString
 448 =============
 449 */
 450 char *PRVM_UglyValueString (etype_t type, prvm_eval_t *val)
 451 {
 452         static char line[MAX_INPUTLINE];
 453         int i;
 454         const char *s;
 455         ddef_t *def;
 456         mfunction_t *f;
 457
 458         type = (etype_t)((int)type & ~DEF_SAVEGLOBAL);
 459
 460         switch (type)
 461         {
 462         case ev_string:
 463                 // Parse the string a bit to turn special characters
 464                 // (like newline, specifically) into escape codes,
 465                 // this fixes saving games from various mods
 466                 s = PRVM_GetString (val->string);
 467                 for (i = 0;i < (int)sizeof(line) - 2 && *s;)
 468                 {
 469                         if (*s == '\n')
 470                         {
 471                                 line[i++] = '\\';
 472                                 line[i++] = 'n';
 473                         }
 474                         else if (*s == '\r')
 475                         {
 476                                 line[i++] = '\\';
 477                                 line[i++] = 'r';
 478                         }
 479                         else
 480                                 line[i++] = *s;
 481                         s++;
 482                 }
 483                 line[i] = '\0';
 484                 break;
 485         case ev_entity:
 486                 dpsnprintf (line, sizeof (line), "%i", PRVM_NUM_FOR_EDICT(PRVM_PROG_TO_EDICT(val->edict)));
 487                 break;
 488         case ev_function:
 489                 f = prog->functions + val->function;
 490                 strlcpy (line, PRVM_GetString (f->s_name), sizeof (line));
 491                 break;
 492         case ev_field:
 493                 def = PRVM_ED_FieldAtOfs ( val->_int );
 494                 dpsnprintf (line, sizeof (line), ".%s", PRVM_GetString(def->s_name));
 495                 break;
 496         case ev_void:
 497                 dpsnprintf (line, sizeof (line), "void");
 498                 break;
 499         case ev_float:
 500                 dpsnprintf (line, sizeof (line), "%f", val->_float);
 501                 break;
 502         case ev_vector:
 503                 dpsnprintf (line, sizeof (line), "%f %f %f", val->vector[0], val->vector[1], val->vector[2]);
 504                 break;
 505         default:
 506                 dpsnprintf (line, sizeof (line), "bad type %i", type);
 507                 break;
 508         }
 509
 510         return line;
 511 }
 512
 513 /*
 514 ============
 515 PRVM_GlobalString
 516
 517 Returns a string with a description and the contents of a global,
 518 padded to 20 field width
 519 ============
 520 */
 521 char *PRVM_GlobalString (int ofs)
 522 {
 523         char    *s;
 524         //size_t        i;
 525         ddef_t  *def;
 526         void    *val;
 527         static char     line[128];
 528
 529         val = (void *)&prog->globals.generic[ofs];
 530         def = PRVM_ED_GlobalAtOfs(ofs);
 531         if (!def)
 532                 sprintf (line,"GLOBAL%i", ofs);
 533         else
 534         {
 535                 s = PRVM_ValueString ((etype_t)def->type, (prvm_eval_t *)val);
 536                 sprintf (line,"%s (=%s)", PRVM_GetString(def->s_name), s);
 537         }
 538
 539         //i = strlen(line);
 540         //for ( ; i<20 ; i++)
 541         //      strcat (line," ");
 542         //strcat (line," ");
 543
 544         return line;
 545 }
 546
 547 char *PRVM_GlobalStringNoContents (int ofs)
 548 {
 549         //size_t        i;
 550         ddef_t  *def;
 551         static char     line[128];
 552
 553         def = PRVM_ED_GlobalAtOfs(ofs);
 554         if (!def)
 555                 sprintf (line,"GLOBAL%i", ofs);
 556         else
 557                 sprintf (line,"%s", PRVM_GetString(def->s_name));
 558
 559         //i = strlen(line);
 560         //for ( ; i<20 ; i++)
 561         //      strcat (line," ");
 562         //strcat (line," ");
 563
 564         return line;
 565 }
 566
 567
 568 /*
 569 =============
 570 PRVM_ED_Print
 571
 572 For debugging
 573 =============
 574 */
 575 // LordHavoc: optimized this to print out much more quickly (tempstring)
 576 // LordHavoc: changed to print out every 4096 characters (incase there are a lot of fields to print)
 577 void PRVM_ED_Print(prvm_edict_t *ed, const char *wildcard_fieldname)
 578 {
 579         size_t  l;
 580         ddef_t  *d;
 581         int             *v;
 582         int             i, j;
 583         const char      *name;
 584         int             type;
 585         char    tempstring[MAX_INPUTLINE], tempstring2[260]; // temporary string buffers
 586
 587         if (ed->priv.required->free)
 588         {
 589                 Con_Printf("%s: FREE\n",PRVM_NAME);
 590                 return;
 591         }
 592
 593         tempstring[0] = 0;
 594         sprintf(tempstring, "\n%s EDICT %i:\n", PRVM_NAME, PRVM_NUM_FOR_EDICT(ed));
 595         for (i=1 ; i<prog->progs->numfielddefs ; i++)
 596         {
 597                 d = &prog->fielddefs[i];
 598                 name = PRVM_GetString(d->s_name);
 599                 if (name[strlen(name)-2] == '_')
 600                         continue;       // skip _x, _y, _z vars
 601
 602                 // Check Field Name Wildcard
 603                 if(wildcard_fieldname)
 604                         if( !matchpattern(name, wildcard_fieldname, 1) )
 605                                 // Didn't match; skip
 606                                 continue;
 607
 608                 v = (int *)((char *)ed->fields.vp + d->ofs*4);
 609
 610         // if the value is still all 0, skip the field
 611                 type = d->type & ~DEF_SAVEGLOBAL;
 612
 613                 for (j=0 ; j<prvm_type_size[type] ; j++)
 614                         if (v[j])
 615                                 break;
 616                 if (j == prvm_type_size[type])
 617                         continue;
 618
 619                 if (strlen(name) > sizeof(tempstring2)-4)
 620                 {
 621                         memcpy (tempstring2, name, sizeof(tempstring2)-4);
 622                         tempstring2[sizeof(tempstring2)-4] = tempstring2[sizeof(tempstring2)-3] = tempstring2[sizeof(tempstring2)-2] = '.';
 623                         tempstring2[sizeof(tempstring2)-1] = 0;
 624                         name = tempstring2;
 625                 }
 626                 strlcat(tempstring, name, sizeof(tempstring));
 627                 for (l = strlen(name);l < 14;l++)
 628                         strlcat(tempstring, " ", sizeof(tempstring));
 629                 strlcat(tempstring, " ", sizeof(tempstring));
 630
 631                 name = PRVM_ValueString((etype_t)d->type, (prvm_eval_t *)v);
 632                 if (strlen(name) > sizeof(tempstring2)-4)
 633                 {
 634                         memcpy (tempstring2, name, sizeof(tempstring2)-4);
 635                         tempstring2[sizeof(tempstring2)-4] = tempstring2[sizeof(tempstring2)-3] = tempstring2[sizeof(tempstring2)-2] = '.';
 636                         tempstring2[sizeof(tempstring2)-1] = 0;
 637                         name = tempstring2;
 638                 }
 639                 strlcat(tempstring, name, sizeof(tempstring));
 640                 strlcat(tempstring, "\n", sizeof(tempstring));
 641                 if (strlen(tempstring) >= sizeof(tempstring)/2)
 642                 {
 643                         Con_Print(tempstring);
 644                         tempstring[0] = 0;
 645                 }
 646         }
 647         if (tempstring[0])
 648                 Con_Print(tempstring);
 649 }
 650
 651 /*
 652 =============
 653 PRVM_ED_Write
 654
 655 For savegames
 656 =============
 657 */
 658 void PRVM_ED_Write (qfile_t *f, prvm_edict_t *ed)
 659 {
 660         ddef_t  *d;
 661         int             *v;
 662         int             i, j;
 663         const char      *name;
 664         int             type;
 665
 666         FS_Print(f, "{\n");
 667
 668         if (ed->priv.required->free)
 669         {
 670                 FS_Print(f, "}\n");
 671                 return;
 672         }
 673
 674         for (i=1 ; i<prog->progs->numfielddefs ; i++)
 675         {
 676                 d = &prog->fielddefs[i];
 677                 name = PRVM_GetString(d->s_name);
 678                 if (name[strlen(name)-2] == '_')
 679                         continue;       // skip _x, _y, _z vars
 680
 681                 v = (int *)((char *)ed->fields.vp + d->ofs*4);
 682
 683         // if the value is still all 0, skip the field
 684                 type = d->type & ~DEF_SAVEGLOBAL;
 685                 for (j=0 ; j<prvm_type_size[type] ; j++)
 686                         if (v[j])
 687                                 break;
 688                 if (j == prvm_type_size[type])
 689                         continue;
 690
 691                 FS_Printf(f,"\"%s\" ",name);
 692                 FS_Printf(f,"\"%s\"\n", PRVM_UglyValueString((etype_t)d->type, (prvm_eval_t *)v));
 693         }
 694
 695         FS_Print(f, "}\n");
 696 }
 697
 698 void PRVM_ED_PrintNum (int ent, const char *wildcard_fieldname)
 699 {
 700         PRVM_ED_Print(PRVM_EDICT_NUM(ent), wildcard_fieldname);
 701 }
 702
 703 /*
 704 =============
 705 PRVM_ED_PrintEdicts_f
 706
 707 For debugging, prints all the entities in the current server
 708 =============
 709 */
 710 void PRVM_ED_PrintEdicts_f (void)
 711 {
 712         int             i;
 713         const char *wildcard_fieldname;
 714
 715         if(Cmd_Argc() < 2 || Cmd_Argc() > 3)
 716         {
 717                 Con_Print("prvm_edicts <program name> <optional field name wildcard>\n");
 718                 return;
 719         }
 720
 721         PRVM_Begin;
 722         if(!PRVM_SetProgFromString(Cmd_Argv(1)))
 723                 return;
 724
 725         if( Cmd_Argc() == 3)
 726                 wildcard_fieldname = Cmd_Argv(2);
 727         else
 728                 wildcard_fieldname = NULL;
 729
 730         Con_Printf("%s: %i entities\n", PRVM_NAME, prog->num_edicts);
 731         for (i=0 ; i<prog->num_edicts ; i++)
 732                 PRVM_ED_PrintNum (i, wildcard_fieldname);
 733
 734         PRVM_End;
 735 }
 736
 737 /*
 738 =============
 739 PRVM_ED_PrintEdict_f
 740
 741 For debugging, prints a single edict
 742 =============
 743 */
 744 void PRVM_ED_PrintEdict_f (void)
 745 {
 746         int             i;
 747         const char      *wildcard_fieldname;
 748
 749         if(Cmd_Argc() < 3 || Cmd_Argc() > 4)
 750         {
 751                 Con_Print("prvm_edict <program name> <edict number> <optional field name wildcard>\n");
 752                 return;
 753         }
 754
 755         PRVM_Begin;
 756         if(!PRVM_SetProgFromString(Cmd_Argv(1)))
 757                 return;
 758
 759         i = atoi (Cmd_Argv(2));
 760         if (i >= prog->num_edicts)
 761         {
 762                 Con_Print("Bad edict number\n");
 763                 PRVM_End;
 764                 return;
 765         }
 766         if( Cmd_Argc() == 4)
 767                 // Optional Wildcard Provided
 768                 wildcard_fieldname = Cmd_Argv(3);
 769         else
 770                 // Use All
 771                 wildcard_fieldname = NULL;
 772         PRVM_ED_PrintNum (i, wildcard_fieldname);
 773
 774         PRVM_End;
 775 }
 776
 777 /*
 778 =============
 779 PRVM_ED_Count
 780
 781 For debugging
 782 =============
 783 */
 784 // 2 possibilities : 1. just displaying the active edict count
 785 //                                       2. making a function pointer [x]
 786 void PRVM_ED_Count_f (void)
 787 {
 788         int             i;
 789         prvm_edict_t    *ent;
 790         int             active;
 791
 792         if(Cmd_Argc() != 2)
 793         {
 794                 Con_Print("prvm_count <program name>\n");
 795                 return;
 796         }
 797
 798         PRVM_Begin;
 799         if(!PRVM_SetProgFromString(Cmd_Argv(1)))
 800                 return;
 801
 802         if(prog->count_edicts)
 803                 prog->count_edicts();
 804         else
 805         {
 806                 active = 0;
 807                 for (i=0 ; i<prog->num_edicts ; i++)
 808                 {
 809                         ent = PRVM_EDICT_NUM(i);
 810                         if (ent->priv.required->free)
 811                                 continue;
 812                         active++;
 813                 }
 814
 815                 Con_Printf("num_edicts:%3i\n", prog->num_edicts);
 816                 Con_Printf("active    :%3i\n", active);
 817         }
 818
 819         PRVM_End;
 820 }
 821
 822 /*
 823 ==============================================================================
 824
 825                                         ARCHIVING GLOBALS
 826
 827 FIXME: need to tag constants, doesn't really work
 828 ==============================================================================
 829 */
 830
 831 /*
 832 =============
 833 PRVM_ED_WriteGlobals
 834 =============
 835 */
 836 void PRVM_ED_WriteGlobals (qfile_t *f)
 837 {
 838         ddef_t          *def;
 839         int                     i;
 840         const char              *name;
 841         int                     type;
 842
 843         FS_Print(f,"{\n");
 844         for (i=0 ; i<prog->progs->numglobaldefs ; i++)
 845         {
 846                 def = &prog->globaldefs[i];
 847                 type = def->type;
 848                 if ( !(def->type & DEF_SAVEGLOBAL) )
 849                         continue;
 850                 type &= ~DEF_SAVEGLOBAL;
 851
 852                 if (type != ev_string && type != ev_float && type != ev_entity)
 853                         continue;
 854
 855                 name = PRVM_GetString(def->s_name);
 856                 FS_Printf(f,"\"%s\" ", name);
 857                 FS_Printf(f,"\"%s\"\n", PRVM_UglyValueString((etype_t)type, (prvm_eval_t *)&prog->globals.generic[def->ofs]));
 858         }
 859         FS_Print(f,"}\n");
 860 }
 861
 862 /*
 863 =============
 864 PRVM_ED_ParseGlobals
 865 =============
 866 */
 867 void PRVM_ED_ParseGlobals (const char *data)
 868 {
 869         char keyname[MAX_INPUTLINE];
 870         ddef_t *key;
 871
 872         while (1)
 873         {
 874                 // parse key
 875                 if (!COM_ParseToken_Simple(&data, false))
 876                         PRVM_ERROR ("PRVM_ED_ParseGlobals: EOF without closing brace");
 877                 if (com_token[0] == '}')
 878                         break;
 879
 880                 strlcpy (keyname, com_token, sizeof(keyname));
 881
 882                 // parse value
 883                 if (!COM_ParseToken_Simple(&data, false))
 884                         PRVM_ERROR ("PRVM_ED_ParseGlobals: EOF without closing brace");
 885
 886                 if (com_token[0] == '}')
 887                         PRVM_ERROR ("PRVM_ED_ParseGlobals: closing brace without data");
 888
 889                 key = PRVM_ED_FindGlobal (keyname);
 890                 if (!key)
 891                 {
 892                         Con_DPrintf("'%s' is not a global on %s\n", keyname, PRVM_NAME);
 893                         continue;
 894                 }
 895
 896                 if (!PRVM_ED_ParseEpair(NULL, key, com_token))
 897                         PRVM_ERROR ("PRVM_ED_ParseGlobals: parse error");
 898         }
 899 }
 900
 901 //============================================================================
 902
 903
 904 /*
 905 =============
 906 PRVM_ED_ParseEval
 907
 908 Can parse either fields or globals
 909 returns false if error
 910 =============
 911 */
 912 qboolean PRVM_ED_ParseEpair(prvm_edict_t *ent, ddef_t *key, const char *s)
 913 {
 914         int i, l;
 915         char *new_p;
 916         ddef_t *def;
 917         prvm_eval_t *val;
 918         mfunction_t *func;
 919
 920         if (ent)
 921                 val = (prvm_eval_t *)((int *)ent->fields.vp + key->ofs);
 922         else
 923                 val = (prvm_eval_t *)((int *)prog->globals.generic + key->ofs);
 924         switch (key->type & ~DEF_SAVEGLOBAL)
 925         {
 926         case ev_string:
 927                 l = (int)strlen(s) + 1;
 928                 val->string = PRVM_AllocString(l, &new_p);
 929                 for (i = 0;i < l;i++)
 930                 {
 931                         if (s[i] == '\\' && i < l-1)
 932                         {
 933                                 i++;
 934                                 if (s[i] == 'n')
 935                                         *new_p++ = '\n';
 936                                 else if (s[i] == 'r')
 937                                         *new_p++ = '\r';
 938                                 else
 939                                         *new_p++ = s[i];
 940                         }
 941                         else
 942                                 *new_p++ = s[i];
 943                 }
 944                 break;
 945
 946         case ev_float:
 947                 while (*s && *s <= ' ')
 948                         s++;
 949                 val->_float = atof(s);
 950                 break;
 951
 952         case ev_vector:
 953                 for (i = 0;i < 3;i++)
 954                 {
 955                         while (*s && *s <= ' ')
 956                                 s++;
 957                         if (!*s)
 958                                 break;
 959                         val->vector[i] = atof(s);
 960                         while (*s > ' ')
 961                                 s++;
 962                         if (!*s)
 963                                 break;
 964                 }
 965                 break;
 966
 967         case ev_entity:
 968                 while (*s && *s <= ' ')
 969                         s++;
 970                 i = atoi(s);
 971                 if (i >= prog->limit_edicts)
 972                         Con_Printf("PRVM_ED_ParseEpair: ev_entity reference too large (edict %u >= MAX_EDICTS %u) on %s\n", (unsigned int)i, (unsigned int)MAX_EDICTS, PRVM_NAME);
 973                 while (i >= prog->max_edicts)
 974                         PRVM_MEM_IncreaseEdicts();
 975                 // if IncreaseEdicts was called the base pointer needs to be updated
 976                 if (ent)
 977                         val = (prvm_eval_t *)((int *)ent->fields.vp + key->ofs);
 978                 val->edict = PRVM_EDICT_TO_PROG(PRVM_EDICT_NUM((int)i));
 979                 break;
 980
 981         case ev_field:
 982                 def = PRVM_ED_FindField(s);
 983                 if (!def)
 984                 {
 985                         Con_DPrintf("PRVM_ED_ParseEpair: Can't find field %s in %s\n", s, PRVM_NAME);
 986                         return false;
 987                 }
 988                 val->_int = def->ofs;
 989                 break;
 990
 991         case ev_function:
 992                 func = PRVM_ED_FindFunction(s);
 993                 if (!func)
 994                 {
 995                         Con_Printf("PRVM_ED_ParseEpair: Can't find function %s in %s\n", s, PRVM_NAME);
 996                         return false;
 997                 }
 998                 val->function = func - prog->functions;
 999                 break;
1000
1001         default:
1002                 Con_Printf("PRVM_ED_ParseEpair: Unknown key->type %i for key \"%s\" on %s\n", key->type, PRVM_GetString(key->s_name), PRVM_NAME);
1003                 return false;
1004         }
1005         return true;
1006 }
1007
1008 /*
1009 =============
1010 PRVM_GameCommand_f
1011
1012 Console command to send a string to QC function GameCommand of the
1013 indicated progs
1014
1015 Usage:
1016   sv_cmd adminmsg 3 "do not teamkill"
1017   cl_cmd someclientcommand
1018   menu_cmd somemenucommand
1019
1020 All progs can support this extension; sg calls it in server QC, cg in client
1021 QC, mg in menu QC.
1022 =============
1023 */
1024 void PRVM_GameCommand(const char *whichprogs, const char *whichcmd)
1025 {
1026         if(Cmd_Argc() < 1)
1027         {
1028                 Con_Printf("%s text...\n", whichcmd);
1029                 return;
1030         }
1031
1032         PRVM_Begin;
1033         if(!PRVM_SetProgFromString(whichprogs))
1034         // note: this is not PRVM_SetProg because that one aborts "hard" using PRVM_Error
1035         // also, it makes printing error messages easier!
1036         {
1037                 Con_Printf("%s program not loaded.\n", whichprogs);
1038                 return;
1039         }
1040
1041         if(!prog->funcoffsets.GameCommand)
1042         {
1043                 Con_Printf("%s program do not support GameCommand!\n", whichprogs);
1044         }
1045         else
1046         {
1047                 int restorevm_tempstringsbuf_cursize;
1048                 const char *s;
1049
1050                 s = Cmd_Args();
1051
1052                 restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
1053                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(s ? s : "");
1054                 PRVM_ExecuteProgram (prog->funcoffsets.GameCommand, "QC function GameCommand is missing");
1055                 vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
1056         }
1057
1058         PRVM_End;
1059 }
1060 void PRVM_GameCommand_Server_f(void)
1061 {
1062         PRVM_GameCommand("server", "sv_cmd");
1063 }
1064 void PRVM_GameCommand_Client_f(void)
1065 {
1066         PRVM_GameCommand("client", "cl_cmd");
1067 }
1068 void PRVM_GameCommand_Menu_f(void)
1069 {
1070         PRVM_GameCommand("menu", "menu_cmd");
1071 }
1072
1073 /*
1074 =============
1075 PRVM_ED_EdictSet_f
1076
1077 Console command to set a field of a specified edict
1078 =============
1079 */
1080 void PRVM_ED_EdictSet_f(void)
1081 {
1082         prvm_edict_t *ed;
1083         ddef_t *key;
1084
1085         if(Cmd_Argc() != 5)
1086         {
1087                 Con_Print("prvm_edictset <program name> <edict number> <field> <value>\n");
1088                 return;
1089         }
1090
1091         PRVM_Begin;
1092         if(!PRVM_SetProgFromString(Cmd_Argv(1)))
1093         {
1094                 Con_Printf("Wrong program name %s !\n", Cmd_Argv(1));
1095                 return;
1096         }
1097
1098         ed = PRVM_EDICT_NUM(atoi(Cmd_Argv(2)));
1099
1100         if((key = PRVM_ED_FindField(Cmd_Argv(3))) == 0)
1101                 Con_Printf("Key %s not found !\n", Cmd_Argv(3));
1102         else
1103                 PRVM_ED_ParseEpair(ed, key, Cmd_Argv(4));
1104
1105         PRVM_End;
1106 }
1107
1108 /*
1109 ====================
1110 PRVM_ED_ParseEdict
1111
1112 Parses an edict out of the given string, returning the new position
1113 ed should be a properly initialized empty edict.
1114 Used for initial level load and for savegames.
1115 ====================
1116 */
1117 extern cvar_t developer_entityparsing;
1118 const char *PRVM_ED_ParseEdict (const char *data, prvm_edict_t *ent)
1119 {
1120         ddef_t *key;
1121         qboolean anglehack;
1122         qboolean init;
1123         char keyname[256];
1124         size_t n;
1125
1126         init = false;
1127
1128 // go through all the dictionary pairs
1129         while (1)
1130         {
1131         // parse key
1132                 if (!COM_ParseToken_Simple(&data, false))
1133                         PRVM_ERROR ("PRVM_ED_ParseEdict: EOF without closing brace");
1134                 if (developer_entityparsing.integer)
1135                         Con_Printf("Key: \"%s\"", com_token);
1136                 if (com_token[0] == '}')
1137                         break;
1138
1139                 // anglehack is to allow QuakeEd to write single scalar angles
1140                 // and allow them to be turned into vectors. (FIXME...)
1141                 if (!strcmp(com_token, "angle"))
1142                 {
1143                         strlcpy (com_token, "angles", sizeof(com_token));
1144                         anglehack = true;
1145                 }
1146                 else
1147                         anglehack = false;
1148
1149                 // FIXME: change light to _light to get rid of this hack
1150                 if (!strcmp(com_token, "light"))
1151                         strlcpy (com_token, "light_lev", sizeof(com_token));    // hack for single light def
1152
1153                 strlcpy (keyname, com_token, sizeof(keyname));
1154
1155                 // another hack to fix keynames with trailing spaces
1156                 n = strlen(keyname);
1157                 while (n && keyname[n-1] == ' ')
1158                 {
1159                         keyname[n-1] = 0;
1160                         n--;
1161                 }
1162
1163         // parse value
1164                 if (!COM_ParseToken_Simple(&data, false))
1165                         PRVM_ERROR ("PRVM_ED_ParseEdict: EOF without closing brace");
1166                 if (developer_entityparsing.integer)
1167                         Con_Printf(" \"%s\"\n", com_token);
1168
1169                 if (com_token[0] == '}')
1170                         PRVM_ERROR ("PRVM_ED_ParseEdict: closing brace without data");
1171
1172                 init = true;
1173
1174                 // ignore attempts to set key "" (this problem occurs in nehahra neh1m8.bsp)
1175                 if (!keyname[0])
1176                         continue;
1177
1178 // keynames with a leading underscore are used for utility comments,
1179 // and are immediately discarded by quake
1180                 if (keyname[0] == '_')
1181                         continue;
1182
1183                 key = PRVM_ED_FindField (keyname);
1184                 if (!key)
1185                 {
1186                         Con_DPrintf("%s: '%s' is not a field\n", PRVM_NAME, keyname);
1187                         continue;
1188                 }
1189
1190                 if (anglehack)
1191                 {
1192                         char    temp[32];
1193                         strlcpy (temp, com_token, sizeof(temp));
1194                         sprintf (com_token, "0 %s 0", temp);
1195                 }
1196
1197                 if (!PRVM_ED_ParseEpair(ent, key, com_token))
1198                         PRVM_ERROR ("PRVM_ED_ParseEdict: parse error");
1199         }
1200
1201         if (!init)
1202                 ent->priv.required->free = true;
1203
1204         return data;
1205 }
1206
1207
1208 /*
1209 ================
1210 PRVM_ED_LoadFromFile
1211
1212 The entities are directly placed in the array, rather than allocated with
1213 PRVM_ED_Alloc, because otherwise an error loading the map would have entity
1214 number references out of order.
1215
1216 Creates a server's entity / program execution context by
1217 parsing textual entity definitions out of an ent file.
1218
1219 Used for both fresh maps and savegame loads.  A fresh map would also need
1220 to call PRVM_ED_CallSpawnFunctions () to let the objects initialize themselves.
1221 ================
1222 */
1223 void PRVM_ED_LoadFromFile (const char *data)
1224 {
1225         prvm_edict_t *ent;
1226         int parsed, inhibited, spawned, died;
1227         mfunction_t *func;
1228
1229         parsed = 0;
1230         inhibited = 0;
1231         spawned = 0;
1232         died = 0;
1233
1234
1235 // parse ents
1236         while (1)
1237         {
1238 // parse the opening brace
1239                 if (!COM_ParseToken_Simple(&data, false))
1240                         break;
1241                 if (com_token[0] != '{')
1242                         PRVM_ERROR ("PRVM_ED_LoadFromFile: %s: found %s when expecting {", PRVM_NAME, com_token);
1243
1244                 // CHANGED: this is not conform to PR_LoadFromFile
1245                 if(prog->loadintoworld)
1246                 {
1247                         prog->loadintoworld = false;
1248                         ent = PRVM_EDICT_NUM(0);
1249                 }
1250                 else
1251                         ent = PRVM_ED_Alloc();
1252
1253                 // clear it
1254                 if (ent != prog->edicts)        // hack
1255                         memset (ent->fields.vp, 0, prog->progs->entityfields * 4);
1256
1257                 data = PRVM_ED_ParseEdict (data, ent);
1258                 parsed++;
1259
1260                 // remove the entity ?
1261                 if(prog->load_edict && !prog->load_edict(ent))
1262                 {
1263                         PRVM_ED_Free(ent);
1264                         inhibited++;
1265                         continue;
1266                 }
1267
1268 //
1269 // immediately call spawn function, but only if there is a self global and a classname
1270 //
1271                 if(prog->globaloffsets.self >= 0 && prog->fieldoffsets.classname >= 0)
1272                 {
1273                         string_t handle =  PRVM_EDICTFIELDVALUE(ent, prog->fieldoffsets.classname)->string;
1274                         if (!handle)
1275                         {
1276                                 Con_Print("No classname for:\n");
1277                                 PRVM_ED_Print(ent, NULL);
1278                                 PRVM_ED_Free (ent);
1279                                 continue;
1280                         }
1281
1282                         // look for the spawn function
1283                         func = PRVM_ED_FindFunction (PRVM_GetString(handle));
1284
1285                         if (!func)
1286                         {
1287                                 if (developer.integer) // don't confuse non-developers with errors
1288                                 {
1289                                         Con_Print("No spawn function for:\n");
1290                                         PRVM_ED_Print(ent, NULL);
1291                                 }
1292                                 PRVM_ED_Free (ent);
1293                                 continue;
1294                         }
1295
1296                         // self = ent
1297                         PRVM_GLOBALFIELDVALUE(prog->globaloffsets.self)->edict = PRVM_EDICT_TO_PROG(ent);
1298                         PRVM_ExecuteProgram (func - prog->functions, "");
1299                 }
1300
1301                 spawned++;
1302                 if (ent->priv.required->free)
1303                         died++;
1304         }
1305
1306         Con_DPrintf("%s: %i new entities parsed, %i new inhibited, %i (%i new) spawned (whereas %i removed self, %i stayed)\n", PRVM_NAME, parsed, inhibited, prog->num_edicts, spawned, died, spawned - died);
1307 }
1308
1309 void PRVM_FindOffsets(void)
1310 {
1311         // field and global searches use -1 for NULL
1312         memset(&prog->fieldoffsets, -1, sizeof(prog->fieldoffsets));
1313         memset(&prog->globaloffsets, -1, sizeof(prog->globaloffsets));
1314         // functions use 0 for NULL
1315         memset(&prog->funcoffsets, 0, sizeof(prog->funcoffsets));
1316
1317         // server and client qc use a lot of similar fields, so this is combined
1318         prog->fieldoffsets.SendEntity                     = PRVM_ED_FindFieldOffset("SendEntity");
1319         prog->fieldoffsets.Version                        = PRVM_ED_FindFieldOffset("Version");
1320         prog->fieldoffsets.alpha                          = PRVM_ED_FindFieldOffset("alpha");
1321         prog->fieldoffsets.ammo_cells1                    = PRVM_ED_FindFieldOffset("ammo_cells1");
1322         prog->fieldoffsets.ammo_lava_nails                = PRVM_ED_FindFieldOffset("ammo_lava_nails");
1323         prog->fieldoffsets.ammo_multi_rockets             = PRVM_ED_FindFieldOffset("ammo_multi_rockets");
1324         prog->fieldoffsets.ammo_nails1                    = PRVM_ED_FindFieldOffset("ammo_nails1");
1325         prog->fieldoffsets.ammo_plasma                    = PRVM_ED_FindFieldOffset("ammo_plasma");
1326         prog->fieldoffsets.ammo_rockets1                  = PRVM_ED_FindFieldOffset("ammo_rockets1");
1327         prog->fieldoffsets.ammo_shells1                   = PRVM_ED_FindFieldOffset("ammo_shells1");
1328         prog->fieldoffsets.angles                         = PRVM_ED_FindFieldOffset("angles");
1329         prog->fieldoffsets.button3                        = PRVM_ED_FindFieldOffset("button3");
1330         prog->fieldoffsets.button4                        = PRVM_ED_FindFieldOffset("button4");
1331         prog->fieldoffsets.button5                        = PRVM_ED_FindFieldOffset("button5");
1332         prog->fieldoffsets.button6                        = PRVM_ED_FindFieldOffset("button6");
1333         prog->fieldoffsets.button7                        = PRVM_ED_FindFieldOffset("button7");
1334         prog->fieldoffsets.button8                        = PRVM_ED_FindFieldOffset("button8");
1335         prog->fieldoffsets.button9                        = PRVM_ED_FindFieldOffset("button9");
1336         prog->fieldoffsets.button10                       = PRVM_ED_FindFieldOffset("button10");
1337         prog->fieldoffsets.button11                       = PRVM_ED_FindFieldOffset("button11");
1338         prog->fieldoffsets.button12                       = PRVM_ED_FindFieldOffset("button12");
1339         prog->fieldoffsets.button13                       = PRVM_ED_FindFieldOffset("button13");
1340         prog->fieldoffsets.button14                       = PRVM_ED_FindFieldOffset("button14");
1341         prog->fieldoffsets.button15                       = PRVM_ED_FindFieldOffset("button15");
1342         prog->fieldoffsets.button16                       = PRVM_ED_FindFieldOffset("button16");
1343         prog->fieldoffsets.buttonchat                     = PRVM_ED_FindFieldOffset("buttonchat");
1344         prog->fieldoffsets.buttonuse                      = PRVM_ED_FindFieldOffset("buttonuse");
1345         prog->fieldoffsets.chain                          = PRVM_ED_FindFieldOffset("chain");
1346         prog->fieldoffsets.classname                      = PRVM_ED_FindFieldOffset("classname");
1347         prog->fieldoffsets.clientcolors                   = PRVM_ED_FindFieldOffset("clientcolors");
1348         prog->fieldoffsets.color                          = PRVM_ED_FindFieldOffset("color");
1349         prog->fieldoffsets.colormod                       = PRVM_ED_FindFieldOffset("colormod");
1350         prog->fieldoffsets.contentstransition             = PRVM_ED_FindFieldOffset("contentstransition");
1351         prog->fieldoffsets.cursor_active                  = PRVM_ED_FindFieldOffset("cursor_active");
1352         prog->fieldoffsets.cursor_screen                  = PRVM_ED_FindFieldOffset("cursor_screen");
1353         prog->fieldoffsets.cursor_trace_endpos            = PRVM_ED_FindFieldOffset("cursor_trace_endpos");
1354         prog->fieldoffsets.cursor_trace_ent               = PRVM_ED_FindFieldOffset("cursor_trace_ent");
1355         prog->fieldoffsets.cursor_trace_start             = PRVM_ED_FindFieldOffset("cursor_trace_start");
1356         prog->fieldoffsets.customizeentityforclient       = PRVM_ED_FindFieldOffset("customizeentityforclient");
1357         prog->fieldoffsets.dimension_hit                  = PRVM_ED_FindFieldOffset("dimension_hit");
1358         prog->fieldoffsets.dimension_solid                = PRVM_ED_FindFieldOffset("dimension_solid");
1359         prog->fieldoffsets.disableclientprediction        = PRVM_ED_FindFieldOffset("disableclientprediction");
1360         prog->fieldoffsets.dphitcontentsmask              = PRVM_ED_FindFieldOffset("dphitcontentsmask");
1361         prog->fieldoffsets.drawonlytoclient               = PRVM_ED_FindFieldOffset("drawonlytoclient");
1362         prog->fieldoffsets.exteriormodeltoclient          = PRVM_ED_FindFieldOffset("exteriormodeltoclient");
1363         prog->fieldoffsets.fatness                        = PRVM_ED_FindFieldOffset("fatness");
1364         prog->fieldoffsets.forceshader                    = PRVM_ED_FindFieldOffset("forceshader");
1365         prog->fieldoffsets.frame                          = PRVM_ED_FindFieldOffset("frame");
1366         prog->fieldoffsets.frame1time                     = PRVM_ED_FindFieldOffset("frame1time");
1367         prog->fieldoffsets.frame2                         = PRVM_ED_FindFieldOffset("frame2");
1368         prog->fieldoffsets.frame2time                     = PRVM_ED_FindFieldOffset("frame2time");
1369         prog->fieldoffsets.fullbright                     = PRVM_ED_FindFieldOffset("fullbright");
1370         prog->fieldoffsets.glow_color                     = PRVM_ED_FindFieldOffset("glow_color");
1371         prog->fieldoffsets.glow_size                      = PRVM_ED_FindFieldOffset("glow_size");
1372         prog->fieldoffsets.glow_trail                     = PRVM_ED_FindFieldOffset("glow_trail");
1373         prog->fieldoffsets.gravity                        = PRVM_ED_FindFieldOffset("gravity");
1374         prog->fieldoffsets.groundentity                   = PRVM_ED_FindFieldOffset("groundentity");
1375         prog->fieldoffsets.hull                           = PRVM_ED_FindFieldOffset("hull");
1376         prog->fieldoffsets.ideal_yaw                      = PRVM_ED_FindFieldOffset("ideal_yaw");
1377         prog->fieldoffsets.idealpitch                     = PRVM_ED_FindFieldOffset("idealpitch");
1378         prog->fieldoffsets.items2                         = PRVM_ED_FindFieldOffset("items2");
1379         prog->fieldoffsets.lerpfrac                       = PRVM_ED_FindFieldOffset("lerpfrac");
1380         prog->fieldoffsets.light_lev                      = PRVM_ED_FindFieldOffset("light_lev");
1381         prog->fieldoffsets.modelflags                     = PRVM_ED_FindFieldOffset("modelflags");
1382         prog->fieldoffsets.movement                       = PRVM_ED_FindFieldOffset("movement");
1383         prog->fieldoffsets.netaddress                     = PRVM_ED_FindFieldOffset("netaddress");
1384         prog->fieldoffsets.nextthink                      = PRVM_ED_FindFieldOffset("nextthink");
1385         prog->fieldoffsets.nodrawtoclient                 = PRVM_ED_FindFieldOffset("nodrawtoclient");
1386         prog->fieldoffsets.pflags                         = PRVM_ED_FindFieldOffset("pflags");
1387         prog->fieldoffsets.ping                           = PRVM_ED_FindFieldOffset("ping");
1388         prog->fieldoffsets.pitch_speed                    = PRVM_ED_FindFieldOffset("pitch_speed");
1389         prog->fieldoffsets.playermodel                    = PRVM_ED_FindFieldOffset("playermodel");
1390         prog->fieldoffsets.playerskin                     = PRVM_ED_FindFieldOffset("playerskin");
1391         prog->fieldoffsets.pmodel                         = PRVM_ED_FindFieldOffset("pmodel");
1392         prog->fieldoffsets.punchvector                    = PRVM_ED_FindFieldOffset("punchvector");
1393         prog->fieldoffsets.renderamt                      = PRVM_ED_FindFieldOffset("renderamt"); // HalfLife support
1394         prog->fieldoffsets.renderflags                    = PRVM_ED_FindFieldOffset("renderflags");
1395         prog->fieldoffsets.rendermode                     = PRVM_ED_FindFieldOffset("rendermode"); // HalfLife support
1396         prog->fieldoffsets.scale                          = PRVM_ED_FindFieldOffset("scale");
1397         prog->fieldoffsets.style                          = PRVM_ED_FindFieldOffset("style");
1398         prog->fieldoffsets.tag_entity                     = PRVM_ED_FindFieldOffset("tag_entity");
1399         prog->fieldoffsets.tag_index                      = PRVM_ED_FindFieldOffset("tag_index");
1400         prog->fieldoffsets.think                          = PRVM_ED_FindFieldOffset("think");
1401         prog->fieldoffsets.viewmodelforclient             = PRVM_ED_FindFieldOffset("viewmodelforclient");
1402         prog->fieldoffsets.viewzoom                       = PRVM_ED_FindFieldOffset("viewzoom");
1403         prog->fieldoffsets.yaw_speed                      = PRVM_ED_FindFieldOffset("yaw_speed");
1404         prog->funcoffsets.CSQC_ConsoleCommand             = PRVM_ED_FindFunctionOffset("CSQC_ConsoleCommand");
1405         prog->funcoffsets.CSQC_Ent_Remove                 = PRVM_ED_FindFunctionOffset("CSQC_Ent_Remove");
1406         prog->funcoffsets.CSQC_Ent_Update                 = PRVM_ED_FindFunctionOffset("CSQC_Ent_Update");
1407         prog->funcoffsets.CSQC_Event                      = PRVM_ED_FindFunctionOffset("CSQC_Event");
1408         prog->funcoffsets.CSQC_Init                       = PRVM_ED_FindFunctionOffset("CSQC_Init");
1409         prog->funcoffsets.CSQC_InputEvent                 = PRVM_ED_FindFunctionOffset("CSQC_InputEvent");
1410         prog->funcoffsets.CSQC_Parse_CenterPrint          = PRVM_ED_FindFunctionOffset("CSQC_Parse_CenterPrint");
1411         prog->funcoffsets.CSQC_Parse_Print                = PRVM_ED_FindFunctionOffset("CSQC_Parse_Print");
1412         prog->funcoffsets.CSQC_Parse_StuffCmd             = PRVM_ED_FindFunctionOffset("CSQC_Parse_StuffCmd");
1413         prog->funcoffsets.CSQC_Parse_TempEntity           = PRVM_ED_FindFunctionOffset("CSQC_Parse_TempEntity");
1414         prog->funcoffsets.CSQC_Shutdown                   = PRVM_ED_FindFunctionOffset("CSQC_Shutdown");
1415         prog->funcoffsets.CSQC_UpdateView                 = PRVM_ED_FindFunctionOffset("CSQC_UpdateView");
1416         prog->funcoffsets.EndFrame                        = PRVM_ED_FindFunctionOffset("EndFrame");
1417         prog->funcoffsets.RestoreGame                     = PRVM_ED_FindFunctionOffset("RestoreGame");
1418         prog->funcoffsets.SV_ChangeTeam                   = PRVM_ED_FindFunctionOffset("SV_ChangeTeam");
1419         prog->funcoffsets.SV_ParseClientCommand           = PRVM_ED_FindFunctionOffset("SV_ParseClientCommand");
1420         prog->funcoffsets.SV_PlayerPhysics                = PRVM_ED_FindFunctionOffset("SV_PlayerPhysics");
1421         prog->funcoffsets.GameCommand                     = PRVM_ED_FindFunctionOffset("GameCommand");
1422         prog->globaloffsets.SV_InitCmd                    = PRVM_ED_FindGlobalOffset("SV_InitCmd");
1423         prog->globaloffsets.self                          = PRVM_ED_FindGlobalOffset("self");
1424         prog->globaloffsets.time                          = PRVM_ED_FindGlobalOffset("time");
1425         prog->globaloffsets.v_forward                     = PRVM_ED_FindGlobalOffset("v_forward");
1426         prog->globaloffsets.v_right                       = PRVM_ED_FindGlobalOffset("v_right");
1427         prog->globaloffsets.v_up                          = PRVM_ED_FindGlobalOffset("v_up");
1428         prog->globaloffsets.view_angles                   = PRVM_ED_FindGlobalOffset("view_angles");
1429         prog->globaloffsets.trace_allsolid                = PRVM_ED_FindGlobalOffset("trace_allsolid");
1430         prog->globaloffsets.trace_startsolid              = PRVM_ED_FindGlobalOffset("trace_startsolid");
1431         prog->globaloffsets.trace_fraction                = PRVM_ED_FindGlobalOffset("trace_fraction");
1432         prog->globaloffsets.trace_inwater                 = PRVM_ED_FindGlobalOffset("trace_inwater");
1433         prog->globaloffsets.trace_inopen                  = PRVM_ED_FindGlobalOffset("trace_inopen");
1434         prog->globaloffsets.trace_endpos                  = PRVM_ED_FindGlobalOffset("trace_endpos");
1435         prog->globaloffsets.trace_plane_normal            = PRVM_ED_FindGlobalOffset("trace_plane_normal");
1436         prog->globaloffsets.trace_plane_dist              = PRVM_ED_FindGlobalOffset("trace_plane_dist");
1437         prog->globaloffsets.trace_ent                     = PRVM_ED_FindGlobalOffset("trace_ent");
1438         prog->globaloffsets.trace_dphitcontents           = PRVM_ED_FindGlobalOffset("trace_dphitcontents");
1439         prog->globaloffsets.trace_dphitq3surfaceflags     = PRVM_ED_FindGlobalOffset("trace_dphitq3surfaceflags");
1440         prog->globaloffsets.trace_dphittexturename        = PRVM_ED_FindGlobalOffset("trace_dphittexturename");
1441         prog->globaloffsets.trace_dpstartcontents         = PRVM_ED_FindGlobalOffset("trace_dpstartcontents");
1442
1443         // menu qc only uses some functions, nothing else
1444         prog->funcoffsets.m_display                       = PRVM_ED_FindFunctionOffset("m_display");
1445         prog->funcoffsets.m_draw                          = PRVM_ED_FindFunctionOffset("m_draw");
1446         prog->funcoffsets.m_hide                          = PRVM_ED_FindFunctionOffset("m_hide");
1447         prog->funcoffsets.m_init                          = PRVM_ED_FindFunctionOffset("m_init");
1448         prog->funcoffsets.m_keydown                       = PRVM_ED_FindFunctionOffset("m_keydown");
1449         prog->funcoffsets.m_keyup                         = PRVM_ED_FindFunctionOffset("m_keyup");
1450         prog->funcoffsets.m_shutdown                      = PRVM_ED_FindFunctionOffset("m_shutdown");
1451         prog->funcoffsets.m_toggle                        = PRVM_ED_FindFunctionOffset("m_toggle");
1452 }
1453
1454 // not used
1455 /*
1456 typedef struct dpfield_s
1457 {
1458         int type;
1459         char *string;
1460 }
1461 dpfield_t;
1462
1463 #define DPFIELDS (sizeof(dpfields) / sizeof(dpfield_t))
1464
1465 dpfield_t dpfields[] =
1466 {
1467 };
1468 */
1469
1470 /*
1471 ===============
1472 PRVM_ResetProg
1473 ===============
1474 */
1475
1476 void PRVM_ResetProg()
1477 {
1478         PRVM_GCALL(reset_cmd)();
1479         Mem_FreePool(&prog->progs_mempool);
1480         memset(prog,0,sizeof(prvm_prog_t));
1481 }
1482
1483 /*
1484 ===============
1485 PRVM_LoadLNO
1486 ===============
1487 */
1488 void PRVM_LoadLNO( const char *progname ) {
1489         fs_offset_t filesize;
1490         unsigned char *lno;
1491         unsigned int *header;
1492         char filename[512];
1493
1494         FS_StripExtension( progname, filename, sizeof( filename ) );
1495         strlcat( filename, ".lno", sizeof( filename ) );
1496
1497         lno = FS_LoadFile( filename, tempmempool, false, &filesize );
1498         if( !lno ) {
1499                 return;
1500         }
1501
1502 /*
1503 <Spike>    SafeWrite (h, &lnotype, sizeof(int));
1504 <Spike>    SafeWrite (h, &version, sizeof(int));
1505 <Spike>    SafeWrite (h, &numglobaldefs, sizeof(int));
1506 <Spike>    SafeWrite (h, &numpr_globals, sizeof(int));
1507 <Spike>    SafeWrite (h, &numfielddefs, sizeof(int));
1508 <Spike>    SafeWrite (h, &numstatements, sizeof(int));
1509 <Spike>    SafeWrite (h, statement_linenums, numstatements*sizeof(int));
1510 */
1511         if( (unsigned) filesize < (6 + prog->progs->numstatements) * sizeof( int ) ) {
1512                 Mem_Free(lno);
1513                 return;
1514         }
1515
1516         header = (unsigned int *) lno;
1517         if( header[ 0 ] == *(unsigned int *) "LNOF" &&
1518                 LittleLong( header[ 1 ] ) == 1 &&
1519                 (unsigned int)LittleLong( header[ 2 ] ) == (unsigned int)prog->progs->numglobaldefs &&
1520                 (unsigned int)LittleLong( header[ 3 ] ) == (unsigned int)prog->progs->numglobals &&
1521                 (unsigned int)LittleLong( header[ 4 ] ) == (unsigned int)prog->progs->numfielddefs &&
1522                 (unsigned int)LittleLong( header[ 5 ] ) == (unsigned int)prog->progs->numstatements )
1523         {
1524                 prog->statement_linenums = (int *)Mem_Alloc(prog->progs_mempool, prog->progs->numstatements * sizeof( int ) );
1525                 memcpy( prog->statement_linenums, (int *) lno + 6, prog->progs->numstatements * sizeof( int ) );
1526         }
1527         Mem_Free( lno );
1528 }
1529
1530 /*
1531 ===============
1532 PRVM_LoadProgs
1533 ===============
1534 */
1535 void PRVM_LoadProgs (const char * filename, int numrequiredfunc, char **required_func, int numrequiredfields, prvm_required_field_t *required_field, int numrequiredglobals, char **required_global)
1536 {
1537         int i;
1538         dstatement_t *st;
1539         ddef_t *infielddefs;
1540         dfunction_t *dfunctions;
1541         fs_offset_t filesize;
1542
1543         if( prog->loaded ) {
1544                 PRVM_ERROR ("PRVM_LoadProgs: there is already a %s program loaded!", PRVM_NAME );
1545         }
1546
1547         prog->progs = (dprograms_t *)FS_LoadFile (filename, prog->progs_mempool, false, &filesize);
1548         if (prog->progs == NULL || filesize < (fs_offset_t)sizeof(dprograms_t))
1549                 PRVM_ERROR ("PRVM_LoadProgs: couldn't load %s for %s", filename, PRVM_NAME);
1550
1551         Con_DPrintf("%s programs occupy %iK.\n", PRVM_NAME, (int)(filesize/1024));
1552
1553         prog->filecrc = CRC_Block((unsigned char *)prog->progs, filesize);
1554
1555 // byte swap the header
1556         for (i = 0;i < (int) sizeof(*prog->progs) / 4;i++)
1557                 ((int *)prog->progs)[i] = LittleLong ( ((int *)prog->progs)[i] );
1558
1559         if (prog->progs->version != PROG_VERSION)
1560                 PRVM_ERROR ("%s: %s has wrong version number (%i should be %i)", PRVM_NAME, filename, prog->progs->version, PROG_VERSION);
1561         if (prog->progs->crc != prog->headercrc)
1562                 PRVM_ERROR ("%s: %s system vars have been modified, progdefs.h is out of date", PRVM_NAME, filename);
1563
1564         //prog->functions = (dfunction_t *)((unsigned char *)progs + progs->ofs_functions);
1565         dfunctions = (dfunction_t *)((unsigned char *)prog->progs + prog->progs->ofs_functions);
1566
1567         prog->strings = (char *)prog->progs + prog->progs->ofs_strings;
1568         prog->stringssize = 0;
1569         for (i = 0;i < prog->progs->numstrings;i++)
1570         {
1571                 if (prog->progs->ofs_strings + prog->stringssize >= (int)filesize)
1572                         PRVM_ERROR ("%s: %s strings go past end of file", PRVM_NAME, filename);
1573                 prog->stringssize += (int)strlen (prog->strings + prog->stringssize) + 1;
1574         }
1575         prog->numknownstrings = 0;
1576         prog->maxknownstrings = 0;
1577         prog->knownstrings = NULL;
1578         prog->knownstrings_freeable = NULL;
1579
1580         prog->globaldefs = (ddef_t *)((unsigned char *)prog->progs + prog->progs->ofs_globaldefs);
1581
1582         // we need to expand the fielddefs list to include all the engine fields,
1583         // so allocate a new place for it
1584         infielddefs = (ddef_t *)((unsigned char *)prog->progs + prog->progs->ofs_fielddefs);
1585         //                                                                                              ( + DPFIELDS                       )
1586         prog->fielddefs = (ddef_t *)Mem_Alloc(prog->progs_mempool, (prog->progs->numfielddefs + numrequiredfields) * sizeof(ddef_t));
1587
1588         prog->statements = (dstatement_t *)((unsigned char *)prog->progs + prog->progs->ofs_statements);
1589
1590         prog->statement_profile = (double *)Mem_Alloc(prog->progs_mempool, prog->progs->numstatements * sizeof(*prog->statement_profile));
1591
1592         // moved edict_size calculation down below field adding code
1593
1594         //pr_global_struct = (globalvars_t *)((unsigned char *)progs + progs->ofs_globals);
1595         prog->globals.generic = (float *)((unsigned char *)prog->progs + prog->progs->ofs_globals);
1596
1597 // byte swap the lumps
1598         for (i=0 ; i<prog->progs->numstatements ; i++)
1599         {
1600                 prog->statements[i].op = LittleShort(prog->statements[i].op);
1601                 prog->statements[i].a = LittleShort(prog->statements[i].a);
1602                 prog->statements[i].b = LittleShort(prog->statements[i].b);
1603                 prog->statements[i].c = LittleShort(prog->statements[i].c);
1604         }
1605
1606         prog->functions = (mfunction_t *)Mem_Alloc(prog->progs_mempool, sizeof(mfunction_t) * prog->progs->numfunctions);
1607         for (i = 0;i < prog->progs->numfunctions;i++)
1608         {
1609                 prog->functions[i].first_statement = LittleLong (dfunctions[i].first_statement);
1610                 prog->functions[i].parm_start = LittleLong (dfunctions[i].parm_start);
1611                 prog->functions[i].s_name = LittleLong (dfunctions[i].s_name);
1612                 prog->functions[i].s_file = LittleLong (dfunctions[i].s_file);
1613                 prog->functions[i].numparms = LittleLong (dfunctions[i].numparms);
1614                 prog->functions[i].locals = LittleLong (dfunctions[i].locals);
1615                 memcpy(prog->functions[i].parm_size, dfunctions[i].parm_size, sizeof(dfunctions[i].parm_size));
1616         }
1617
1618         for (i=0 ; i<prog->progs->numglobaldefs ; i++)
1619         {
1620                 prog->globaldefs[i].type = LittleShort (prog->globaldefs[i].type);
1621                 prog->globaldefs[i].ofs = LittleShort (prog->globaldefs[i].ofs);
1622                 prog->globaldefs[i].s_name = LittleLong (prog->globaldefs[i].s_name);
1623         }
1624
1625         // copy the progs fields to the new fields list
1626         for (i = 0;i < prog->progs->numfielddefs;i++)
1627         {
1628                 prog->fielddefs[i].type = LittleShort (infielddefs[i].type);
1629                 if (prog->fielddefs[i].type & DEF_SAVEGLOBAL)
1630                         PRVM_ERROR ("PRVM_LoadProgs: prog->fielddefs[i].type & DEF_SAVEGLOBAL in %s", PRVM_NAME);
1631                 prog->fielddefs[i].ofs = LittleShort (infielddefs[i].ofs);
1632                 prog->fielddefs[i].s_name = LittleLong (infielddefs[i].s_name);
1633         }
1634
1635         // append the required fields
1636         for (i = 0;i < (int) numrequiredfields;i++)
1637         {
1638                 prog->fielddefs[prog->progs->numfielddefs].type = required_field[i].type;
1639                 prog->fielddefs[prog->progs->numfielddefs].ofs = prog->progs->entityfields;
1640                 prog->fielddefs[prog->progs->numfielddefs].s_name = PRVM_SetEngineString(required_field[i].name);
1641                 if (prog->fielddefs[prog->progs->numfielddefs].type == ev_vector)
1642                         prog->progs->entityfields += 3;
1643                 else
1644                         prog->progs->entityfields++;
1645                 prog->progs->numfielddefs++;
1646         }
1647
1648         // check required functions
1649         for(i=0 ; i < numrequiredfunc ; i++)
1650                 if(PRVM_ED_FindFunction(required_func[i]) == 0)
1651                         PRVM_ERROR("%s: %s not found in %s",PRVM_NAME, required_func[i], filename);
1652
1653         // check required globals
1654         for(i=0 ; i < numrequiredglobals ; i++)
1655                 if(PRVM_ED_FindGlobal(required_global[i]) == 0)
1656                         PRVM_ERROR("%s: %s not found in %s",PRVM_NAME, required_global[i], filename);
1657
1658         for (i=0 ; i<prog->progs->numglobals ; i++)
1659                 ((int *)prog->globals.generic)[i] = LittleLong (((int *)prog->globals.generic)[i]);
1660
1661         // moved edict_size calculation down here, below field adding code
1662         // LordHavoc: this no longer includes the prvm_edict_t header
1663         prog->edict_size = prog->progs->entityfields * 4;
1664         prog->edictareasize = prog->edict_size * prog->limit_edicts;
1665
1666         // LordHavoc: bounds check anything static
1667         for (i = 0,st = prog->statements;i < prog->progs->numstatements;i++,st++)
1668         {
1669                 switch (st->op)
1670                 {
1671                 case OP_IF:
1672                 case OP_IFNOT:
1673                         if ((unsigned short) st->a >= prog->progs->numglobals || st->b + i < 0 || st->b + i >= prog->progs->numstatements)
1674                                 PRVM_ERROR("PRVM_LoadProgs: out of bounds IF/IFNOT (statement %d) in %s", i, PRVM_NAME);
1675                         break;
1676                 case OP_GOTO:
1677                         if (st->a + i < 0 || st->a + i >= prog->progs->numstatements)
1678                                 PRVM_ERROR("PRVM_LoadProgs: out of bounds GOTO (statement %d) in %s", i, PRVM_NAME);
1679                         break;
1680                 // global global global
1681                 case OP_ADD_F:
1682                 case OP_ADD_V:
1683                 case OP_SUB_F:
1684                 case OP_SUB_V:
1685                 case OP_MUL_F:
1686                 case OP_MUL_V:
1687                 case OP_MUL_FV:
1688                 case OP_MUL_VF:
1689                 case OP_DIV_F:
1690                 case OP_BITAND:
1691                 case OP_BITOR:
1692                 case OP_GE:
1693                 case OP_LE:
1694                 case OP_GT:
1695                 case OP_LT:
1696                 case OP_AND:
1697                 case OP_OR:
1698                 case OP_EQ_F:
1699                 case OP_EQ_V:
1700                 case OP_EQ_S:
1701                 case OP_EQ_E:
1702                 case OP_EQ_FNC:
1703                 case OP_NE_F:
1704                 case OP_NE_V:
1705                 case OP_NE_S:
1706                 case OP_NE_E:
1707                 case OP_NE_FNC:
1708                 case OP_ADDRESS:
1709                 case OP_LOAD_F:
1710                 case OP_LOAD_FLD:
1711                 case OP_LOAD_ENT:
1712                 case OP_LOAD_S:
1713                 case OP_LOAD_FNC:
1714                 case OP_LOAD_V:
1715                         if ((unsigned short) st->a >= prog->progs->numglobals || (unsigned short) st->b >= prog->progs->numglobals || (unsigned short) st->c >= prog->progs->numglobals)
1716                                 PRVM_ERROR("PRVM_LoadProgs: out of bounds global index (statement %d)", i);
1717                         break;
1718                 // global none global
1719                 case OP_NOT_F:
1720                 case OP_NOT_V:
1721                 case OP_NOT_S:
1722                 case OP_NOT_FNC:
1723                 case OP_NOT_ENT:
1724                         if ((unsigned short) st->a >= prog->progs->numglobals || (unsigned short) st->c >= prog->progs->numglobals)
1725                                 PRVM_ERROR("PRVM_LoadProgs: out of bounds global index (statement %d) in %s", i, PRVM_NAME);
1726                         break;
1727                 // 2 globals
1728                 case OP_STOREP_F:
1729                 case OP_STOREP_ENT:
1730                 case OP_STOREP_FLD:
1731                 case OP_STOREP_S:
1732                 case OP_STOREP_FNC:
1733                 case OP_STORE_F:
1734                 case OP_STORE_ENT:
1735                 case OP_STORE_FLD:
1736                 case OP_STORE_S:
1737                 case OP_STORE_FNC:
1738                 case OP_STATE:
1739                 case OP_STOREP_V:
1740                 case OP_STORE_V:
1741                         if ((unsigned short) st->a >= prog->progs->numglobals || (unsigned short) st->b >= prog->progs->numglobals)
1742                                 PRVM_ERROR("PRVM_LoadProgs: out of bounds global index (statement %d) in %s", i, PRVM_NAME);
1743                         break;
1744                 // 1 global
1745                 case OP_CALL0:
1746                 case OP_CALL1:
1747                 case OP_CALL2:
1748                 case OP_CALL3:
1749                 case OP_CALL4:
1750                 case OP_CALL5:
1751                 case OP_CALL6:
1752                 case OP_CALL7:
1753                 case OP_CALL8:
1754                 case OP_DONE:
1755                 case OP_RETURN:
1756                         if ((unsigned short) st->a >= prog->progs->numglobals)
1757                                 PRVM_ERROR("PRVM_LoadProgs: out of bounds global index (statement %d) in %s", i, PRVM_NAME);
1758                         break;
1759                 default:
1760                         Con_DPrintf("PRVM_LoadProgs: unknown opcode %d at statement %d in %s\n", st->op, i, PRVM_NAME);
1761                         break;
1762                 }
1763         }
1764
1765         PRVM_LoadLNO(filename);
1766
1767         PRVM_Init_Exec();
1768
1769         prog->loaded = TRUE;
1770
1771         // set flags & ddef_ts in prog
1772
1773         prog->flag = 0;
1774
1775         PRVM_FindOffsets();
1776
1777         PRVM_GCALL(init_cmd)();
1778
1779         // init mempools
1780         PRVM_MEM_Alloc();
1781 }
1782
1783
1784 void PRVM_Fields_f (void)
1785 {
1786         int i, j, ednum, used, usedamount;
1787         int *counts;
1788         char tempstring[MAX_INPUTLINE], tempstring2[260];
1789         const char *name;
1790         prvm_edict_t *ed;
1791         ddef_t *d;
1792         int *v;
1793
1794         // TODO
1795         /*
1796         if (!sv.active)
1797         {
1798                 Con_Print("no progs loaded\n");
1799                 return;
1800         }
1801         */
1802
1803         if(Cmd_Argc() != 2)
1804         {
1805                 Con_Print("prvm_fields <program name>\n");
1806                 return;
1807         }
1808
1809         PRVM_Begin;
1810         if(!PRVM_SetProgFromString(Cmd_Argv(1)))
1811                 return;
1812
1813         counts = (int *)Mem_Alloc(tempmempool, prog->progs->numfielddefs * sizeof(int));
1814         for (ednum = 0;ednum < prog->max_edicts;ednum++)
1815         {
1816                 ed = PRVM_EDICT_NUM(ednum);
1817                 if (ed->priv.required->free)
1818                         continue;
1819                 for (i = 1;i < prog->progs->numfielddefs;i++)
1820                 {
1821                         d = &prog->fielddefs[i];
1822                         name = PRVM_GetString(d->s_name);
1823                         if (name[strlen(name)-2] == '_')
1824                                 continue;       // skip _x, _y, _z vars
1825                         v = (int *)((char *)ed->fields.vp + d->ofs*4);
1826                         // if the value is still all 0, skip the field
1827                         for (j = 0;j < prvm_type_size[d->type & ~DEF_SAVEGLOBAL];j++)
1828                         {
1829                                 if (v[j])
1830                                 {
1831                                         counts[i]++;
1832                                         break;
1833                                 }
1834                         }
1835                 }
1836         }
1837         used = 0;
1838         usedamount = 0;
1839         tempstring[0] = 0;
1840         for (i = 0;i < prog->progs->numfielddefs;i++)
1841         {
1842                 d = &prog->fielddefs[i];
1843                 name = PRVM_GetString(d->s_name);
1844                 if (name[strlen(name)-2] == '_')
1845                         continue;       // skip _x, _y, _z vars
1846                 switch(d->type & ~DEF_SAVEGLOBAL)
1847                 {
1848                 case ev_string:
1849                         strlcat(tempstring, "string   ", sizeof(tempstring));
1850                         break;
1851                 case ev_entity:
1852                         strlcat(tempstring, "entity   ", sizeof(tempstring));
1853                         break;
1854                 case ev_function:
1855                         strlcat(tempstring, "function ", sizeof(tempstring));
1856                         break;
1857                 case ev_field:
1858                         strlcat(tempstring, "field    ", sizeof(tempstring));
1859                         break;
1860                 case ev_void:
1861                         strlcat(tempstring, "void     ", sizeof(tempstring));
1862                         break;
1863                 case ev_float:
1864                         strlcat(tempstring, "float    ", sizeof(tempstring));
1865                         break;
1866                 case ev_vector:
1867                         strlcat(tempstring, "vector   ", sizeof(tempstring));
1868                         break;
1869                 case ev_pointer:
1870                         strlcat(tempstring, "pointer  ", sizeof(tempstring));
1871                         break;
1872                 default:
1873                         sprintf (tempstring2, "bad type %i ", d->type & ~DEF_SAVEGLOBAL);
1874                         strlcat(tempstring, tempstring2, sizeof(tempstring));
1875                         break;
1876                 }
1877                 if (strlen(name) > sizeof(tempstring2)-4)
1878                 {
1879                         memcpy (tempstring2, name, sizeof(tempstring2)-4);
1880                         tempstring2[sizeof(tempstring2)-4] = tempstring2[sizeof(tempstring2)-3] = tempstring2[sizeof(tempstring2)-2] = '.';
1881                         tempstring2[sizeof(tempstring2)-1] = 0;
1882                         name = tempstring2;
1883                 }
1884                 strlcat(tempstring, name, sizeof(tempstring));
1885                 for (j = (int)strlen(name);j < 25;j++)
1886                         strlcat(tempstring, " ", sizeof(tempstring));
1887                 sprintf(tempstring2, "%5d", counts[i]);
1888                 strlcat(tempstring, tempstring2, sizeof(tempstring));
1889                 strlcat(tempstring, "\n", sizeof(tempstring));
1890                 if (strlen(tempstring) >= sizeof(tempstring)/2)
1891                 {
1892                         Con_Print(tempstring);
1893                         tempstring[0] = 0;
1894                 }
1895                 if (counts[i])
1896                 {
1897                         used++;
1898                         usedamount += prvm_type_size[d->type & ~DEF_SAVEGLOBAL];
1899                 }
1900         }
1901         Mem_Free(counts);
1902         Con_Printf("%s: %i entity fields (%i in use), totalling %i bytes per edict (%i in use), %i edicts allocated, %i bytes total spent on edict fields (%i needed)\n", PRVM_NAME, prog->progs->entityfields, used, prog->progs->entityfields * 4, usedamount * 4, prog->max_edicts, prog->progs->entityfields * 4 * prog->max_edicts, usedamount * 4 * prog->max_edicts);
1903
1904         PRVM_End;
1905 }
1906
1907 void PRVM_Globals_f (void)
1908 {
1909         int i;
1910         const char *wildcard;
1911         int numculled;
1912                 numculled = 0;
1913         // TODO
1914         /*if (!sv.active)
1915         {
1916                 Con_Print("no progs loaded\n");
1917                 return;
1918         }*/
1919         if(Cmd_Argc () < 2 || Cmd_Argc() > 3)
1920         {
1921                 Con_Print("prvm_globals <program name> <optional name wildcard>\n");
1922                 return;
1923         }
1924
1925         PRVM_Begin;
1926         if(!PRVM_SetProgFromString (Cmd_Argv (1)))
1927                 return;
1928
1929         if( Cmd_Argc() == 3)
1930                 wildcard = Cmd_Argv(2);
1931         else
1932                 wildcard = NULL;
1933
1934         Con_Printf("%s :", PRVM_NAME);
1935
1936         for (i = 0;i < prog->progs->numglobaldefs;i++)
1937         {
1938                 if(wildcard)
1939                         if( !matchpattern( PRVM_GetString(prog->globaldefs[i].s_name), wildcard, 1) )
1940                         {
1941                                 numculled++;
1942                                 continue;
1943                         }
1944                 Con_Printf("%s\n", PRVM_GetString(prog->globaldefs[i].s_name));
1945         }
1946         Con_Printf("%i global variables, %i culled, totalling %i bytes\n", prog->progs->numglobals, numculled, prog->progs->numglobals * 4);
1947
1948         PRVM_End;
1949 }
1950
1951 /*
1952 ===============
1953 PRVM_Global
1954 ===============
1955 */
1956 void PRVM_Global_f(void)
1957 {
1958         ddef_t *global;
1959         if( Cmd_Argc() != 3 ) {
1960                 Con_Printf( "prvm_global <program name> <global name>\n" );
1961                 return;
1962         }
1963
1964         PRVM_Begin;
1965         if( !PRVM_SetProgFromString( Cmd_Argv(1) ) )
1966                 return;
1967
1968         global = PRVM_ED_FindGlobal( Cmd_Argv(2) );
1969         if( !global )
1970                 Con_Printf( "No global '%s' in %s!\n", Cmd_Argv(2), Cmd_Argv(1) );
1971         else
1972                 Con_Printf( "%s: %s\n", Cmd_Argv(2), PRVM_ValueString( (etype_t)global->type, (prvm_eval_t *) &prog->globals.generic[ global->ofs ] ) );
1973         PRVM_End;
1974 }
1975
1976 /*
1977 ===============
1978 PRVM_GlobalSet
1979 ===============
1980 */
1981 void PRVM_GlobalSet_f(void)
1982 {
1983         ddef_t *global;
1984         if( Cmd_Argc() != 4 ) {
1985                 Con_Printf( "prvm_globalset <program name> <global name> <value>\n" );
1986                 return;
1987         }
1988
1989         PRVM_Begin;
1990         if( !PRVM_SetProgFromString( Cmd_Argv(1) ) )
1991                 return;
1992
1993         global = PRVM_ED_FindGlobal( Cmd_Argv(2) );
1994         if( !global )
1995                 Con_Printf( "No global '%s' in %s!\n", Cmd_Argv(2), Cmd_Argv(1) );
1996         else
1997                 PRVM_ED_ParseEpair( NULL, global, Cmd_Argv(3) );
1998         PRVM_End;
1999 }
2000
2001 /*
2002 ===============
2003 PRVM_Init
2004 ===============
2005 */
2006 void PRVM_Init (void)
2007 {
2008         Cmd_AddCommand ("prvm_edict", PRVM_ED_PrintEdict_f, "print all data about an entity number in the selected VM (server, client, menu)");
2009         Cmd_AddCommand ("prvm_edicts", PRVM_ED_PrintEdicts_f, "prints all data about all entities in the selected VM (server, client, menu)");
2010         Cmd_AddCommand ("prvm_edictcount", PRVM_ED_Count_f, "prints number of active entities in the selected VM (server, client, menu)");
2011         Cmd_AddCommand ("prvm_profile", PRVM_Profile_f, "prints execution statistics about the most used QuakeC functions in the selected VM (server, client, menu)");
2012         Cmd_AddCommand ("prvm_fields", PRVM_Fields_f, "prints usage statistics on properties (how many entities have non-zero values) in the selected VM (server, client, menu)");
2013         Cmd_AddCommand ("prvm_globals", PRVM_Globals_f, "prints all global variables in the selected VM (server, client, menu)");
2014         Cmd_AddCommand ("prvm_global", PRVM_Global_f, "prints value of a specified global variable in the selected VM (server, client, menu)");
2015         Cmd_AddCommand ("prvm_globalset", PRVM_GlobalSet_f, "sets value of a specified global variable in the selected VM (server, client, menu)");
2016         Cmd_AddCommand ("prvm_edictset", PRVM_ED_EdictSet_f, "changes value of a specified property of a specified entity in the selected VM (server, client, menu)");
2017         Cmd_AddCommand ("prvm_printfunction", PRVM_PrintFunction_f, "prints a disassembly (QuakeC instructions) of the specified function in the selected VM (server, client, menu)");
2018         Cmd_AddCommand ("cl_cmd", PRVM_GameCommand_Client_f, "calls the client QC function GameCommand with the supplied string as argument");
2019         Cmd_AddCommand ("menu_cmd", PRVM_GameCommand_Menu_f, "calls the menu QC function GameCommand with the supplied string as argument");
2020         Cmd_AddCommand ("sv_cmd", PRVM_GameCommand_Server_f, "calls the server QC function GameCommand with the supplied string as argument");
2021         // LordHavoc: optional runtime bounds checking (speed drain, but worth it for security, on by default - breaks most QCCX features (used by CRMod and others))
2022         Cvar_RegisterVariable (&prvm_boundscheck);
2023         Cvar_RegisterVariable (&prvm_traceqc);
2024         Cvar_RegisterVariable (&prvm_statementprofiling);
2025
2026         //VM_Cmd_Init();
2027 }
2028
2029 /*
2030 ===============
2031 PRVM_InitProg
2032 ===============
2033 */
2034 void PRVM_InitProg(int prognr)
2035 {
2036         if(prognr < 0 || prognr >= PRVM_MAXPROGS)
2037                 Sys_Error("PRVM_InitProg: Invalid program number %i",prognr);
2038
2039         prog = &prog_list[prognr];
2040
2041         if(prog->loaded)
2042                 PRVM_ResetProg();
2043
2044         memset(prog, 0, sizeof(prvm_prog_t));
2045
2046         prog->error_cmd = Host_Error;
2047 }
2048
2049 int PRVM_GetProgNr()
2050 {
2051         return prog - prog_list;
2052 }
2053
2054 void *_PRVM_Alloc(size_t buffersize, const char *filename, int fileline)
2055 {
2056         return _Mem_Alloc(prog->progs_mempool, buffersize, filename, fileline);
2057 }
2058
2059 void _PRVM_Free(void *buffer, const char *filename, int fileline)
2060 {
2061         _Mem_Free(buffer, filename, fileline);
2062 }
2063
2064 void _PRVM_FreeAll(const char *filename, int fileline)
2065 {
2066         prog->progs = NULL;
2067         prog->fielddefs = NULL;
2068         prog->functions = NULL;
2069         _Mem_EmptyPool(prog->progs_mempool, filename, fileline);
2070 }
2071
2072 // LordHavoc: turned PRVM_EDICT_NUM into a #define for speed reasons
2073 prvm_edict_t *PRVM_EDICT_NUM_ERROR(int n, char *filename, int fileline)
2074 {
2075         PRVM_ERROR ("PRVM_EDICT_NUM: %s: bad number %i (called at %s:%i)", PRVM_NAME, n, filename, fileline);
2076         return NULL;
2077 }
2078
2079 /*
2080 int NUM_FOR_EDICT_ERROR(prvm_edict_t *e)
2081 {
2082         PRVM_ERROR ("PRVM_NUM_FOR_EDICT: bad pointer %p (world is %p, entity number would be %i)", e, prog->edicts, e - prog->edicts);
2083         return 0;
2084 }
2085
2086 int PRVM_NUM_FOR_EDICT(prvm_edict_t *e)
2087 {
2088         int n;
2089         n = e - prog->edicts;
2090         if ((unsigned int)n >= prog->limit_edicts)
2091                 Host_Error ("PRVM_NUM_FOR_EDICT: bad pointer");
2092         return n;
2093 }
2094
2095 //int NoCrash_NUM_FOR_EDICT(prvm_edict_t *e)
2096 //{
2097 //      return e - prog->edicts;
2098 //}
2099
2100 //#define       PRVM_EDICT_TO_PROG(e) ((unsigned char *)(((prvm_edict_t *)e)->v) - (unsigned char *)(prog->edictsfields))
2101 //#define PRVM_PROG_TO_EDICT(e) (prog->edicts + ((e) / (progs->entityfields * 4)))
2102 int PRVM_EDICT_TO_PROG(prvm_edict_t *e)
2103 {
2104         int n;
2105         n = e - prog->edicts;
2106         if ((unsigned int)n >= (unsigned int)prog->max_edicts)
2107                 Host_Error("PRVM_EDICT_TO_PROG: invalid edict %8p (number %i compared to world at %8p)", e, n, prog->edicts);
2108         return n;// EXPERIMENTAL
2109         //return (unsigned char *)e->v - (unsigned char *)prog->edictsfields;
2110 }
2111 prvm_edict_t *PRVM_PROG_TO_EDICT(int n)
2112 {
2113         if ((unsigned int)n >= (unsigned int)prog->max_edicts)
2114                 Host_Error("PRVM_PROG_TO_EDICT: invalid edict number %i", n);
2115         return prog->edicts + n; // EXPERIMENTAL
2116         //return prog->edicts + ((n) / (progs->entityfields * 4));
2117 }
2118 */
2119
2120
2121 sizebuf_t vm_tempstringsbuf;
2122
2123 const char *PRVM_GetString(int num)
2124 {
2125         if (num >= 0)
2126         {
2127                 if (num < prog->stringssize)
2128                         return prog->strings + num;
2129                 else
2130 #if 1
2131                 if (num <= prog->stringssize + vm_tempstringsbuf.maxsize)
2132                 {
2133                         num -= prog->stringssize;
2134                         if (num < vm_tempstringsbuf.cursize)
2135                                 return (char *)vm_tempstringsbuf.data + num;
2136                         else
2137                         {
2138                                 VM_Warning("PRVM_GetString: Invalid temp-string offset (%i >= %i vm_tempstringsbuf.cursize)", num, vm_tempstringsbuf.cursize);
2139                                 return "";
2140                         }
2141                 }
2142                 else
2143 #endif
2144                 {
2145                         VM_Warning("PRVM_GetString: Invalid constant-string offset (%i >= %i prog->stringssize)", num, prog->stringssize);
2146                         return "";
2147                 }
2148         }
2149         else
2150         {
2151                 num = -1 - num;
2152 #if 0
2153                 if (num >= (1<<30))
2154                 {
2155                         // special range reserved for tempstrings
2156                         num -= (1<<30);
2157                         if (num < vm_tempstringsbuf.cursize)
2158                                 return (char *)vm_tempstringsbuf.data + num;
2159                         else
2160                         {
2161                                 VM_Warning("PRVM_GetString: Invalid temp-string offset (%i >= %i vm_tempstringsbuf.cursize)", num, vm_tempstringsbuf.cursize);
2162                                 return "";
2163                         }
2164                 }
2165                 else
2166 #endif
2167                 if (num < prog->numknownstrings)
2168                 {
2169                         if (!prog->knownstrings[num])
2170                                 VM_Warning("PRVM_GetString: Invalid zone-string offset (%i has been freed)", num);
2171                         return prog->knownstrings[num];
2172                 }
2173                 else
2174                 {
2175                         VM_Warning("PRVM_GetString: Invalid zone-string offset (%i >= %i)", num, prog->numknownstrings);
2176                         return "";
2177                 }
2178         }
2179 }
2180
2181 int PRVM_SetEngineString(const char *s)
2182 {
2183         int i;
2184         if (!s)
2185                 return 0;
2186         if (s >= prog->strings && s <= prog->strings + prog->stringssize)
2187                 PRVM_ERROR("PRVM_SetEngineString: s in prog->strings area");
2188         // if it's in the tempstrings area, use a reserved range
2189         // (otherwise we'd get millions of useless string offsets cluttering the database)
2190         if (s >= (char *)vm_tempstringsbuf.data && s < (char *)vm_tempstringsbuf.data + vm_tempstringsbuf.maxsize)
2191 #if 1
2192                 return prog->stringssize + (s - (char *)vm_tempstringsbuf.data);
2193 #else
2194                 return -1 - ((1<<30) + (s - (char *)vm_tempstringsbuf.data));
2195 #endif
2196         // see if it's a known string address
2197         for (i = 0;i < prog->numknownstrings;i++)
2198                 if (prog->knownstrings[i] == s)
2199                         return -1 - i;
2200         // new unknown engine string
2201         if (developer.integer >= 200)
2202                 Con_Printf("new engine string %p = \"%s\"\n", s, s);
2203         for (i = prog->firstfreeknownstring;i < prog->numknownstrings;i++)
2204                 if (!prog->knownstrings[i])
2205                         break;
2206         if (i >= prog->numknownstrings)
2207         {
2208                 if (i >= prog->maxknownstrings)
2209                 {
2210                         const char **oldstrings = prog->knownstrings;
2211                         const unsigned char *oldstrings_freeable = prog->knownstrings_freeable;
2212                         prog->maxknownstrings += 128;
2213                         prog->knownstrings = (const char **)PRVM_Alloc(prog->maxknownstrings * sizeof(char *));
2214                         prog->knownstrings_freeable = (unsigned char *)PRVM_Alloc(prog->maxknownstrings * sizeof(unsigned char));
2215                         if (prog->numknownstrings)
2216                         {
2217                                 memcpy((char **)prog->knownstrings, oldstrings, prog->numknownstrings * sizeof(char *));
2218                                 memcpy((char **)prog->knownstrings_freeable, oldstrings_freeable, prog->numknownstrings * sizeof(unsigned char));
2219                         }
2220                 }
2221                 prog->numknownstrings++;
2222         }
2223         prog->firstfreeknownstring = i + 1;
2224         prog->knownstrings[i] = s;
2225         return -1 - i;
2226 }
2227
2228 // temp string handling
2229
2230 // all tempstrings go into this buffer consecutively, and it is reset
2231 // whenever PRVM_ExecuteProgram returns to the engine
2232 // (technically each PRVM_ExecuteProgram call saves the cursize value and
2233 //  restores it on return, so multiple recursive calls can share the same
2234 //  buffer)
2235 // the buffer size is automatically grown as needed
2236
2237 int PRVM_SetTempString(const char *s)
2238 {
2239         int size;
2240         char *t;
2241         if (!s)
2242                 return 0;
2243         size = (int)strlen(s) + 1;
2244         if (developer.integer >= 300)
2245                 Con_Printf("PRVM_SetTempString: cursize %i, size %i\n", vm_tempstringsbuf.cursize, size);
2246         if (vm_tempstringsbuf.maxsize < vm_tempstringsbuf.cursize + size)
2247         {
2248                 sizebuf_t old = vm_tempstringsbuf;
2249                 if (vm_tempstringsbuf.cursize + size >= 1<<28)
2250                         PRVM_ERROR("PRVM_SetTempString: ran out of tempstring memory!  (refusing to grow tempstring buffer over 256MB, cursize %i, size %i)\n", vm_tempstringsbuf.cursize, size);
2251                 vm_tempstringsbuf.maxsize = max(vm_tempstringsbuf.maxsize, 65536);
2252                 while (vm_tempstringsbuf.maxsize < vm_tempstringsbuf.cursize + size)
2253                         vm_tempstringsbuf.maxsize *= 2;
2254                 if (vm_tempstringsbuf.maxsize != old.maxsize || vm_tempstringsbuf.data == NULL)
2255                 {
2256                         if (developer.integer >= 100)
2257                                 Con_Printf("PRVM_SetTempString: enlarging tempstrings buffer (%iKB -> %iKB)\n", old.maxsize/1024, vm_tempstringsbuf.maxsize/1024);
2258                         vm_tempstringsbuf.data = Mem_Alloc(sv_mempool, vm_tempstringsbuf.maxsize);
2259                         if (old.cursize)
2260                                 memcpy(vm_tempstringsbuf.data, old.data, old.cursize);
2261                         if (old.data)
2262                                 Mem_Free(old.data);
2263                 }
2264         }
2265         t = (char *)vm_tempstringsbuf.data + vm_tempstringsbuf.cursize;
2266         memcpy(t, s, size);
2267         vm_tempstringsbuf.cursize += size;
2268         return PRVM_SetEngineString(t);
2269 }
2270
2271 int PRVM_AllocString(size_t bufferlength, char **pointer)
2272 {
2273         int i;
2274         if (!bufferlength)
2275                 return 0;
2276         for (i = prog->firstfreeknownstring;i < prog->numknownstrings;i++)
2277                 if (!prog->knownstrings[i])
2278                         break;
2279         if (i >= prog->numknownstrings)
2280         {
2281                 if (i >= prog->maxknownstrings)
2282                 {
2283                         const char **oldstrings = prog->knownstrings;
2284                         const unsigned char *oldstrings_freeable = prog->knownstrings_freeable;
2285                         prog->maxknownstrings += 128;
2286                         prog->knownstrings = (const char **)PRVM_Alloc(prog->maxknownstrings * sizeof(char *));
2287                         prog->knownstrings_freeable = (unsigned char *)PRVM_Alloc(prog->maxknownstrings * sizeof(unsigned char));
2288                         if (prog->numknownstrings)
2289                         {
2290                                 memcpy((char **)prog->knownstrings, oldstrings, prog->numknownstrings * sizeof(char *));
2291                                 memcpy((char **)prog->knownstrings_freeable, oldstrings_freeable, prog->numknownstrings * sizeof(unsigned char));
2292                         }
2293                 }
2294                 prog->numknownstrings++;
2295         }
2296         prog->firstfreeknownstring = i + 1;
2297         prog->knownstrings[i] = (char *)PRVM_Alloc(bufferlength);
2298         prog->knownstrings_freeable[i] = true;
2299         if (pointer)
2300                 *pointer = (char *)(prog->knownstrings[i]);
2301         return -1 - i;
2302 }
2303
2304 void PRVM_FreeString(int num)
2305 {
2306         if (num == 0)
2307                 PRVM_ERROR("PRVM_FreeString: attempt to free a NULL string");
2308         else if (num >= 0 && num < prog->stringssize)
2309                 PRVM_ERROR("PRVM_FreeString: attempt to free a constant string");
2310         else if (num < 0 && num >= -prog->numknownstrings)
2311         {
2312                 num = -1 - num;
2313                 if (!prog->knownstrings[num])
2314                         PRVM_ERROR("PRVM_FreeString: attempt to free a non-existent or already freed string");
2315                 if (!prog->knownstrings[num])
2316                         PRVM_ERROR("PRVM_FreeString: attempt to free a string owned by the engine");
2317                 PRVM_Free((char *)prog->knownstrings[num]);
2318                 prog->knownstrings[num] = NULL;
2319                 prog->knownstrings_freeable[num] = false;
2320                 prog->firstfreeknownstring = min(prog->firstfreeknownstring, num);
2321         }
2322         else
2323                 PRVM_ERROR("PRVM_FreeString: invalid string offset %i", num);
2324 }
2325