cmd.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 // cmd.c -- Quake script command processing module
  21
  22 #include "quakedef.h"
  23 #include "thread.h"
  24
  25 cmd_state_t *cmd_local;
  26 cmd_state_t *cmd_serverfromclient;
  27
  28 cmd_userdefined_t cmd_userdefined_all;
  29 cmd_userdefined_t cmd_userdefined_null;
  30
  31 typedef struct cmd_iter_s {
  32         cmd_state_t *cmd;
  33 }
  34 cmd_iter_t;
  35
  36 static cmd_iter_t *cmd_iter_all;
  37
  38 mempool_t *cbuf_mempool;
  39
  40 // we only run the +whatever commandline arguments once
  41 qbool host_stuffcmdsrun = false;
  42
  43 //=============================================================================
  44
  45 void Cbuf_Lock(cmd_buf_t *cbuf)
  46 {
  47         Thread_LockMutex(cbuf->lock);
  48 }
  49
  50 void Cbuf_Unlock(cmd_buf_t *cbuf)
  51 {
  52         Thread_UnlockMutex(cbuf->lock);
  53 }
  54
  55
  56 /*
  57 ============
  58 Cmd_Wait_f
  59
  60 Causes execution of the remainder of the command buffer to be delayed until
  61 next frame.  This allows commands like:
  62 bind g "impulse 5 ; +attack ; wait ; -attack ; impulse 2"
  63 ============
  64 */
  65 static void Cmd_Wait_f (cmd_state_t *cmd)
  66 {
  67         cmd->cbuf->wait = true;
  68 }
  69
  70 /*
  71 ============
  72 Cmd_Defer_f
  73
  74 Cause a command to be executed after a delay.
  75 ============
  76 */
  77 static void Cbuf_ParseText(cmd_state_t *cmd, llist_t *head, cmd_input_t *existing, const char *text, qbool allowpending);
  78 static void Cbuf_LinkString(cmd_state_t *cmd, llist_t *head, cmd_input_t *existing, const char *text, qbool leavepending, unsigned int cmdsize);
  79 static void Cmd_Defer_f (cmd_state_t *cmd)
  80 {
  81         cmd_input_t *current;
  82         cmd_buf_t *cbuf = cmd->cbuf;
  83         unsigned int cmdsize;
  84
  85         if(Cmd_Argc(cmd) == 1)
  86         {
  87                 if(List_Is_Empty(&cbuf->deferred))
  88                         Con_Printf("No commands are pending.\n");
  89                 else
  90                 {
  91                         List_For_Each_Entry(current, &cbuf->deferred, cmd_input_t, list)
  92                                 Con_Printf("-> In %9.2f: %s\n", current->delay, current->text);
  93                 }
  94         }
  95         else if(Cmd_Argc(cmd) == 2 && !strcasecmp("clear", Cmd_Argv(cmd, 1)))
  96         {
  97                 while(!List_Is_Empty(&cbuf->deferred))
  98                 {
  99                         cbuf->size -= List_Entry(cbuf->deferred.next, cmd_input_t, list)->length;
 100                         List_Move_Tail(cbuf->deferred.next, &cbuf->free);
 101                 }
 102         }
 103         else if(Cmd_Argc(cmd) == 3 && (cmdsize = strlen(Cmd_Argv(cmd, 2))) )
 104         {
 105                 Cbuf_Lock(cbuf);
 106
 107                 Cbuf_LinkString(cmd, &cbuf->deferred, NULL, Cmd_Argv(cmd, 2), false, cmdsize);
 108                 List_Entry(cbuf->deferred.prev, cmd_input_t, list)->delay = atof(Cmd_Argv(cmd, 1));
 109
 110                 Cbuf_Unlock(cbuf);
 111         }
 112         else
 113         {
 114                 Con_Printf("usage: defer <seconds> <command>\n"
 115                            "       defer clear\n");
 116                 return;
 117         }
 118 }
 119
 120 /*
 121 =============================================================================
 122
 123                                                 COMMAND BUFFER
 124
 125  * The Quake command-line is super basic. It can be entered in the console
 126  * or in config files. A semicolon is used to terminate a command and chain
 127  * them together. Otherwise, a newline delineates command input.
 128  *
 129  * In most engines, the Quake command-line is a simple linear text buffer that
 130  * is parsed when it executes. In Darkplaces, we use a linked list of command
 131  * input and parse the input on the spot.
 132  *
 133  * This was done because Darkplaces allows multiple command interpreters on the
 134  * same thread. Previously, each interpreter maintained its own buffer and this
 135  * caused problems related to execution order, and maintaining a single simple
 136  * buffer for all interpreters makes it non-trivial to keep track of which
 137  * command should execute on which interpreter.
 138
 139 =============================================================================
 140 */
 141
 142 /*
 143 ============
 144 Cbuf_NodeGet
 145
 146 Returns an existing buffer node for appending or reuse, or allocates a new one
 147 ============
 148 */
 149 static cmd_input_t *Cbuf_NodeGet(cmd_buf_t *cbuf, cmd_input_t *existing)
 150 {
 151         cmd_input_t *node;
 152         if(existing && existing->pending)
 153                 node = existing;
 154         else if(!List_Is_Empty(&cbuf->free))
 155         {
 156                 node = List_Entry(cbuf->free.next, cmd_input_t, list);
 157                 node->length = node->pending = 0;
 158         }
 159         else
 160         {
 161                 node = (cmd_input_t *)Mem_Alloc(cbuf_mempool, sizeof(cmd_input_t));
 162                 node->list.prev = node->list.next = &node->list;
 163                 node->size = node->length = node->pending = 0;
 164         }
 165         return node;
 166 }
 167
 168 /*
 169 ============
 170 Cbuf_LinkString
 171
 172 Copies a command string into a buffer node.
 173 The input should not be null-terminated, the output will be.
 174 ============
 175 */
 176 static void Cbuf_LinkString(cmd_state_t *cmd, llist_t *head, cmd_input_t *existing, const char *text, qbool leavepending, unsigned int cmdsize)
 177 {
 178         cmd_buf_t *cbuf = cmd->cbuf;
 179         cmd_input_t *node = Cbuf_NodeGet(cbuf, existing);
 180         unsigned int offset = node->length; // > 0 if(pending)
 181
 182         // node will match existing if its text was pending continuation
 183         if(node != existing)
 184         {
 185                 node->source = cmd;
 186                 List_Move_Tail(&node->list, head);
 187         }
 188
 189         node->length += cmdsize;
 190         if(node->size < node->length)
 191         {
 192                 node->text = (char *)Mem_Realloc(cbuf_mempool, node->text, node->length + 1);
 193                 node->size = node->length;
 194         }
 195         cbuf->size += cmdsize;
 196
 197         dp_ustr2stp(&node->text[offset], node->length + 1, text, cmdsize);
 198         //Con_Printf("^5Cbuf_LinkString(): %s `^7%s^5`\n", node->pending ? "append" : "new", &node->text[offset]);
 199         node->pending = leavepending;
 200 }
 201
 202 /*
 203 ============
 204 Cbuf_ParseText
 205
 206 Parses text to isolate command strings for linking into the buffer
 207 separators: \n \r or unquoted and uncommented ';'
 208 ============
 209 */
 210 static void Cbuf_ParseText(cmd_state_t *cmd, llist_t *head, cmd_input_t *existing, const char *text, qbool allowpending)
 211 {
 212         unsigned int cmdsize = 0, start = 0, pos;
 213         qbool quotes = false, comment = false;
 214
 215         for (pos = 0; text[pos]; ++pos)
 216         {
 217                 switch(text[pos])
 218                 {
 219                         case ';':
 220                                 if (comment || quotes)
 221                                         break;
 222                         case '\r':
 223                         case '\n':
 224                                 comment = false;
 225                                 quotes = false; // matches div0-stable
 226                                 if (cmdsize)
 227                                 {
 228                                         Cbuf_LinkString(cmd, head, existing, &text[start], false, cmdsize);
 229                                         cmdsize = 0;
 230                                 }
 231                                 else if (existing && existing->pending) // all I got was this lousy \n
 232                                         existing->pending = false;
 233                                 continue; // don't increment cmdsize
 234
 235                         case '/':
 236                                 if (!quotes && text[pos + 1] == '/' && (pos == 0 || ISWHITESPACE(text[pos - 1])))
 237                                         comment = true;
 238                                 break;
 239                         case '"':
 240                                 if (!comment && (pos == 0 || text[pos - 1] != '\\'))
 241                                         quotes = !quotes;
 242                                 break;
 243                 }
 244
 245                 if (!comment)
 246                 {
 247                         if (!cmdsize)
 248                                 start = pos;
 249                         ++cmdsize;
 250                 }
 251         }
 252
 253         if (cmdsize) // the line didn't end yet but we do have a string
 254                 Cbuf_LinkString(cmd, head, existing, &text[start], allowpending, cmdsize);
 255 }
 256
 257 /*
 258 ============
 259 Cbuf_AddText
 260
 261 Adds command text at the end of the buffer
 262 ============
 263 */
 264 void Cbuf_AddText (cmd_state_t *cmd, const char *text)
 265 {
 266         size_t l = strlen(text);
 267         cmd_buf_t *cbuf = cmd->cbuf;
 268         llist_t llist = {&llist, &llist};
 269
 270         if (cbuf->size + l > cbuf->maxsize)
 271         {
 272                 Con_Printf(CON_WARN "Cbuf_AddText: input too large, %luKB ought to be enough for anybody.\n", (unsigned long)(cbuf->maxsize / 1024));
 273                 return;
 274         }
 275
 276         Cbuf_Lock(cbuf);
 277
 278         // If the string terminates but the (last) line doesn't, the node will be left in the pending state (to be continued).
 279         Cbuf_ParseText(cmd, &llist, (List_Is_Empty(&cbuf->start) ? NULL : List_Entry(cbuf->start.prev, cmd_input_t, list)), text, true);
 280         List_Splice_Tail(&llist, &cbuf->start);
 281
 282         Cbuf_Unlock(cbuf);
 283 }
 284
 285 /*
 286 ============
 287 Cbuf_InsertText
 288
 289 Adds command text immediately after the current command
 290 ============
 291 */
 292 void Cbuf_InsertText (cmd_state_t *cmd, const char *text)
 293 {
 294         cmd_buf_t *cbuf = cmd->cbuf;
 295         llist_t llist = {&llist, &llist};
 296         size_t l = strlen(text);
 297
 298         if (cbuf->size + l > cbuf->maxsize)
 299         {
 300                 Con_Printf(CON_WARN "Cbuf_InsertText: input too large, %luKB ought to be enough for anybody.\n", (unsigned long)(cbuf->maxsize / 1024));
 301                 return;
 302         }
 303
 304         Cbuf_Lock(cbuf);
 305
 306         // bones_was_here assertion: when prepending to the buffer it never makes sense to leave node(s) in the `pending` state,
 307         // it would have been impossible to append to such text later in the old raw text buffer,
 308         // and allowing it causes bugs when .cfg files lack \n at EOF (see: https://gitlab.com/xonotic/darkplaces/-/issues/378).
 309         Cbuf_ParseText(cmd, &llist, (List_Is_Empty(&cbuf->start) ? NULL : List_Entry(cbuf->start.next, cmd_input_t, list)), text, false);
 310         List_Splice(&llist, &cbuf->start);
 311
 312         Cbuf_Unlock(cbuf);
 313 }
 314
 315 /*
 316 ============
 317 Cbuf_Execute_Deferred --blub
 318 ============
 319 */
 320 static void Cbuf_Execute_Deferred (cmd_buf_t *cbuf)
 321 {
 322         cmd_input_t *current, *n;
 323         vec_t eat;
 324
 325         if (host.realtime - cbuf->deferred_oldtime < 0 || host.realtime - cbuf->deferred_oldtime > 1800)
 326                 cbuf->deferred_oldtime = host.realtime;
 327         eat = host.realtime - cbuf->deferred_oldtime;
 328         if (eat < 1.0/128.0)
 329                 return;
 330         cbuf->deferred_oldtime = host.realtime;
 331
 332         List_For_Each_Entry_Safe(current, n, &cbuf->deferred, cmd_input_t, list)
 333         {
 334                 current->delay -= eat;
 335                 if(current->delay <= 0)
 336                 {
 337                         Cbuf_AddText(current->source, current->text); // parse deferred string and append its cmdstring(s)
 338                         List_Entry(cbuf->start.prev, cmd_input_t, list)->pending = false; // faster than div0-stable's Cbuf_AddText(";\n");
 339                         List_Move_Tail(&current->list, &cbuf->free); // make deferred string memory available for reuse
 340                         cbuf->size -= current->length;
 341                 }
 342         }
 343 }
 344
 345 /*
 346 ============
 347 Cbuf_Execute
 348 ============
 349 */
 350 extern qbool prvm_runawaycheck;
 351 void Cbuf_Execute (cmd_buf_t *cbuf)
 352 {
 353         cmd_input_t *current;
 354         unsigned int i = 0;
 355
 356         // LadyHavoc: making sure the tokenizebuffer doesn't get filled up by repeated crashes
 357         cbuf->tokenizebufferpos = 0;
 358
 359         while (!List_Is_Empty(&cbuf->start))
 360         {
 361                 /*
 362                  * Delete the text from the command buffer and move remaining
 363                  * commands down. This is necessary because commands (exec, alias)
 364                  * can insert data at the beginning of the text buffer
 365                  */
 366                 current = List_Entry(cbuf->start.next, cmd_input_t, list);
 367
 368                 /*
 369                  * Assume we're rolling with the current command-line and
 370                  * always set this false because alias expansion or cbuf insertion
 371                  * without a newline may set this true, and cause weirdness.
 372                  */
 373                 current->pending = false;
 374
 375                 Cmd_PreprocessAndExecuteString(current->source, current->text, current->length, src_local, false);
 376                 cbuf->size -= current->length;
 377                 // Recycle memory so using WASD doesn't cause a malloc and free
 378                 List_Move_Tail(&current->list, &cbuf->free);
 379
 380                 if (cbuf->wait)
 381                 {
 382                         /*
 383                          * Skip out while text still remains in
 384                          * buffer, leaving it for next frame
 385                          */
 386                         cbuf->wait = false;
 387                         break;
 388                 }
 389
 390                 if (++i == 1000000 && prvm_runawaycheck)
 391                 {
 392                         Con_Printf(CON_WARN "Cbuf_Execute: runaway loop counter hit limit of %d commands, clearing command buffers!\n", i);
 393                         Cbuf_Clear(cbuf);
 394                 }
 395         }
 396 }
 397
 398 /*
 399 ===================
 400 Cbuf_Frame_Input
 401
 402 Add them exactly as if they had been typed at the console
 403 ===================
 404 */
 405 static void Cbuf_Frame_Input(void)
 406 {
 407         char *line;
 408
 409         if ((line = Sys_ConsoleInput()))
 410         {
 411                 // bones_was_here: prepending allows a loop such as `alias foo "bar; wait; foo"; foo`
 412                 // to be broken with an alias or unalias command
 413                 Cbuf_InsertText(cmd_local, line);
 414         }
 415 }
 416
 417 void Cbuf_Frame(cmd_buf_t *cbuf)
 418 {
 419         // check for commands typed to the host
 420         Cbuf_Frame_Input();
 421
 422 //      R_TimeReport("preconsole");
 423
 424         // execute commands queued with the defer command
 425         Cbuf_Execute_Deferred(cbuf);
 426         if (cbuf->size)
 427         {
 428                 SV_LockThreadMutex();
 429                 Cbuf_Execute(cbuf);
 430                 SV_UnlockThreadMutex();
 431         }
 432
 433 //      R_TimeReport("console");
 434 }
 435
 436 void Cbuf_Clear(cmd_buf_t *cbuf)
 437 {
 438         while (!List_Is_Empty(&cbuf->start))
 439                 List_Move_Tail(cbuf->start.next, &cbuf->free);
 440         while (!List_Is_Empty(&cbuf->deferred))
 441                 List_Move_Tail(cbuf->deferred.next, &cbuf->free);
 442         cbuf->size = 0;
 443 }
 444
 445 /*
 446 ==============================================================================
 447
 448                                                 SCRIPT COMMANDS
 449
 450 ==============================================================================
 451 */
 452
 453 /*
 454 ===============
 455 Cmd_StuffCmds_f
 456
 457 Adds command line parameters as script statements
 458 Commands lead with a +, and continue until a - or another +
 459 quake +prog jctest.qp +cmd amlev1
 460 quake -nosound +cmd amlev1
 461 ===============
 462 */
 463 static void Cmd_StuffCmds_f (cmd_state_t *cmd)
 464 {
 465         int             i, j, l;
 466         // this is for all commandline options combined (and is bounds checked)
 467         char    build[MAX_INPUTLINE];
 468
 469         if (Cmd_Argc (cmd) != 1)
 470         {
 471                 Con_Print("stuffcmds : execute command line parameters\n");
 472                 return;
 473         }
 474
 475         // no reason to run the commandline arguments twice
 476         if (host_stuffcmdsrun)
 477                 return;
 478
 479         host_stuffcmdsrun = true;
 480         build[0] = 0;
 481         l = 0;
 482         for (i = 0;i < sys.argc;i++)
 483         {
 484                 if (sys.argv[i] && sys.argv[i][0] == '+' && (sys.argv[i][1] < '0' || sys.argv[i][1] > '9') && l + strlen(sys.argv[i]) - 1 <= sizeof(build) - 1)
 485                 {
 486                         j = 1;
 487                         while (sys.argv[i][j])
 488                                 build[l++] = sys.argv[i][j++];
 489                         i++;
 490                         for (;i < sys.argc;i++)
 491                         {
 492                                 if (!sys.argv[i])
 493                                         continue;
 494                                 if ((sys.argv[i][0] == '+' || sys.argv[i][0] == '-') && (sys.argv[i][1] < '0' || sys.argv[i][1] > '9'))
 495                                         break;
 496                                 if (l + strlen(sys.argv[i]) + 4 > sizeof(build) - 1)
 497                                         break;
 498                                 build[l++] = ' ';
 499                                 if (strchr(sys.argv[i], ' '))
 500                                         build[l++] = '\"';
 501                                 for (j = 0;sys.argv[i][j];j++)
 502                                         build[l++] = sys.argv[i][j];
 503                                 if (strchr(sys.argv[i], ' '))
 504                                         build[l++] = '\"';
 505                         }
 506                         build[l++] = '\n';
 507                         i--;
 508                 }
 509         }
 510         // now terminate the combined string and prepend it to the command buffer
 511         // we already reserved space for the terminator
 512         build[l++] = 0;
 513         Cbuf_InsertText (cmd, build);
 514 }
 515
 516 static void Cmd_Exec(cmd_state_t *cmd, const char *filename)
 517 {
 518         char *f;
 519         size_t filenameLen = strlen(filename);
 520         qbool isdefaultcfg =
 521                 !strcmp(filename, "default.cfg") ||
 522                 (filenameLen >= 12 && !strcmp(filename + filenameLen - 12, "/default.cfg"));
 523
 524         if (!strcmp(filename, "config.cfg"))
 525         {
 526                 filename = CONFIGFILENAME;
 527                 if (Sys_CheckParm("-noconfig"))
 528                         return; // don't execute config.cfg
 529         }
 530
 531         f = (char *)FS_LoadFile (filename, tempmempool, false, NULL);
 532         if (!f)
 533         {
 534                 Con_Printf(CON_WARN "couldn't exec %s\n",filename);
 535                 return;
 536         }
 537         Con_Printf("execing %s\n",filename);
 538
 539         // if executing default.cfg for the first time, lock the cvar defaults
 540         // it may seem backwards to insert this text BEFORE the default.cfg
 541         // but Cbuf_InsertText inserts before, so this actually ends up after it.
 542         if (isdefaultcfg)
 543                 Cbuf_InsertText(cmd, "\ncvar_lockdefaults\n");
 544
 545         Cbuf_InsertText (cmd, f);
 546         Mem_Free(f);
 547
 548         if (isdefaultcfg)
 549         {
 550                 // special defaults for specific games go here, these execute before default.cfg
 551                 switch(gamemode)
 552                 {
 553                 case GAME_NORMAL:
 554                         Cbuf_InsertText(cmd, "\n"
 555 "sv_gameplayfix_blowupfallenzombies 0\n"
 556 "sv_gameplayfix_findradiusdistancetobox 0\n"
 557 "sv_gameplayfix_grenadebouncedownslopes 0\n"
 558 "sv_gameplayfix_slidemoveprojectiles 0\n"
 559 "sv_gameplayfix_upwardvelocityclearsongroundflag 0\n"
 560 "sv_gameplayfix_setmodelrealbox 0\n"
 561 "sv_gameplayfix_droptofloorstartsolid 0\n"
 562 "sv_gameplayfix_droptofloorstartsolid_nudgetocorrect 0\n"
 563 "sv_gameplayfix_noairborncorpse 0\n"
 564 "sv_gameplayfix_noairborncorpse_allowsuspendeditems 0\n"
 565 "sv_gameplayfix_easierwaterjump 0\n"
 566 "sv_gameplayfix_delayprojectiles 0\n"
 567 "sv_gameplayfix_multiplethinksperframe 0\n"
 568 "sv_gameplayfix_fixedcheckwatertransition 0\n"
 569 "sv_gameplayfix_q1bsptracelinereportstexture 0\n"
 570 "sv_gameplayfix_swiminbmodels 0\n"
 571 "sv_gameplayfix_downtracesupportsongroundflag 0\n"
 572 "sys_ticrate 0.01388889\n"
 573 "r_shadow_gloss 1\n"
 574 "r_shadow_bumpscale_basetexture 0\n"
 575 "csqc_polygons_defaultmaterial_nocullface 0\n"
 576                                 );
 577                         break;
 578                 // Nehahra pushable crates malfunction in some levels if this is on
 579                 // Nehahra NPC AI is confused by blowupfallenzombies
 580                 case GAME_NEHAHRA:
 581                         Cbuf_InsertText(cmd, "\n"
 582 "sv_gameplayfix_blowupfallenzombies 0\n"
 583 "sv_gameplayfix_findradiusdistancetobox 0\n"
 584 "sv_gameplayfix_grenadebouncedownslopes 0\n"
 585 "sv_gameplayfix_slidemoveprojectiles 0\n"
 586 "sv_gameplayfix_upwardvelocityclearsongroundflag 0\n"
 587 "sv_gameplayfix_setmodelrealbox 0\n"
 588 "sv_gameplayfix_droptofloorstartsolid 0\n"
 589 "sv_gameplayfix_droptofloorstartsolid_nudgetocorrect 0\n"
 590 "sv_gameplayfix_noairborncorpse 0\n"
 591 "sv_gameplayfix_noairborncorpse_allowsuspendeditems 0\n"
 592 "sv_gameplayfix_easierwaterjump 0\n"
 593 "sv_gameplayfix_delayprojectiles 0\n"
 594 "sv_gameplayfix_multiplethinksperframe 0\n"
 595 "sv_gameplayfix_fixedcheckwatertransition 0\n"
 596 "sv_gameplayfix_q1bsptracelinereportstexture 0\n"
 597 "sv_gameplayfix_swiminbmodels 0\n"
 598 "sv_gameplayfix_downtracesupportsongroundflag 0\n"
 599 "sys_ticrate 0.01388889\n"
 600 "r_shadow_gloss 1\n"
 601 "r_shadow_bumpscale_basetexture 0\n"
 602 "csqc_polygons_defaultmaterial_nocullface 0\n"
 603                                 );
 604                         break;
 605                 // hipnotic mission pack has issues in their 'friendly monster' ai, which seem to attempt to attack themselves for some reason when findradius() returns non-solid entities.
 606                 // hipnotic mission pack has issues with bobbing water entities 'jittering' between different heights on alternate frames at the default 0.0138889 ticrate, 0.02 avoids this issue
 607                 // hipnotic mission pack has issues in their proximity mine sticking code, which causes them to bounce off.
 608                 case GAME_HIPNOTIC:
 609                 case GAME_QUOTH:
 610                         Cbuf_InsertText(cmd, "\n"
 611 "sv_gameplayfix_blowupfallenzombies 0\n"
 612 "sv_gameplayfix_findradiusdistancetobox 0\n"
 613 "sv_gameplayfix_grenadebouncedownslopes 0\n"
 614 "sv_gameplayfix_slidemoveprojectiles 0\n"
 615 "sv_gameplayfix_upwardvelocityclearsongroundflag 0\n"
 616 "sv_gameplayfix_setmodelrealbox 0\n"
 617 "sv_gameplayfix_droptofloorstartsolid 0\n"
 618 "sv_gameplayfix_droptofloorstartsolid_nudgetocorrect 0\n"
 619 "sv_gameplayfix_noairborncorpse 0\n"
 620 "sv_gameplayfix_noairborncorpse_allowsuspendeditems 0\n"
 621 "sv_gameplayfix_easierwaterjump 0\n"
 622 "sv_gameplayfix_delayprojectiles 0\n"
 623 "sv_gameplayfix_multiplethinksperframe 0\n"
 624 "sv_gameplayfix_fixedcheckwatertransition 0\n"
 625 "sv_gameplayfix_q1bsptracelinereportstexture 0\n"
 626 "sv_gameplayfix_swiminbmodels 0\n"
 627 "sv_gameplayfix_downtracesupportsongroundflag 0\n"
 628 "sys_ticrate 0.02\n"
 629 "r_shadow_gloss 1\n"
 630 "r_shadow_bumpscale_basetexture 0\n"
 631 "csqc_polygons_defaultmaterial_nocullface 0\n"
 632                                 );
 633                         break;
 634                 // rogue mission pack has a guardian boss that does not wake up if findradius returns one of the entities around its spawn area
 635                 // On r2m3 3 of the 4 monster_lava_man are placed in solid clips so droptofloor() moves them to a lower level if tracebox can
 636                 // move them out of solid, if it can't they're stuck (original behaviour), only proper fix is to move them with a .ent file.
 637                 case GAME_ROGUE:
 638                         Cbuf_InsertText(cmd, "\n"
 639 "mod_q1bsp_traceoutofsolid 0\n"
 640 "sv_gameplayfix_blowupfallenzombies 0\n"
 641 "sv_gameplayfix_findradiusdistancetobox 0\n"
 642 "sv_gameplayfix_grenadebouncedownslopes 0\n"
 643 "sv_gameplayfix_slidemoveprojectiles 0\n"
 644 "sv_gameplayfix_upwardvelocityclearsongroundflag 0\n"
 645 "sv_gameplayfix_setmodelrealbox 0\n"
 646 "sv_gameplayfix_droptofloorstartsolid 0\n"
 647 "sv_gameplayfix_droptofloorstartsolid_nudgetocorrect 0\n"
 648 "sv_gameplayfix_noairborncorpse 0\n"
 649 "sv_gameplayfix_noairborncorpse_allowsuspendeditems 0\n"
 650 "sv_gameplayfix_easierwaterjump 0\n"
 651 "sv_gameplayfix_delayprojectiles 0\n"
 652 "sv_gameplayfix_multiplethinksperframe 0\n"
 653 "sv_gameplayfix_fixedcheckwatertransition 0\n"
 654 "sv_gameplayfix_q1bsptracelinereportstexture 0\n"
 655 "sv_gameplayfix_swiminbmodels 0\n"
 656 "sv_gameplayfix_downtracesupportsongroundflag 0\n"
 657 "sys_ticrate 0.01388889\n"
 658 "r_shadow_gloss 1\n"
 659 "r_shadow_bumpscale_basetexture 0\n"
 660 "csqc_polygons_defaultmaterial_nocullface 0\n"
 661                                 );
 662                         break;
 663                 case GAME_TENEBRAE:
 664                         Cbuf_InsertText(cmd, "\n"
 665 "sv_gameplayfix_blowupfallenzombies 0\n"
 666 "sv_gameplayfix_findradiusdistancetobox 0\n"
 667 "sv_gameplayfix_grenadebouncedownslopes 0\n"
 668 "sv_gameplayfix_slidemoveprojectiles 0\n"
 669 "sv_gameplayfix_upwardvelocityclearsongroundflag 0\n"
 670 "sv_gameplayfix_setmodelrealbox 0\n"
 671 "sv_gameplayfix_droptofloorstartsolid 0\n"
 672 "sv_gameplayfix_droptofloorstartsolid_nudgetocorrect 0\n"
 673 "sv_gameplayfix_noairborncorpse 0\n"
 674 "sv_gameplayfix_noairborncorpse_allowsuspendeditems 0\n"
 675 "sv_gameplayfix_easierwaterjump 0\n"
 676 "sv_gameplayfix_delayprojectiles 0\n"
 677 "sv_gameplayfix_multiplethinksperframe 0\n"
 678 "sv_gameplayfix_fixedcheckwatertransition 0\n"
 679 "sv_gameplayfix_q1bsptracelinereportstexture 0\n"
 680 "sv_gameplayfix_swiminbmodels 0\n"
 681 "sv_gameplayfix_downtracesupportsongroundflag 0\n"
 682 "sys_ticrate 0.01388889\n"
 683 "r_shadow_gloss 2\n"
 684 "r_shadow_bumpscale_basetexture 4\n"
 685 "csqc_polygons_defaultmaterial_nocullface 0\n"
 686                                 );
 687                         break;
 688                 case GAME_NEXUIZ:
 689                         Cbuf_InsertText(cmd, "\n"
 690 "sv_gameplayfix_blowupfallenzombies 1\n"
 691 "sv_gameplayfix_findradiusdistancetobox 1\n"
 692 "sv_gameplayfix_grenadebouncedownslopes 1\n"
 693 "sv_gameplayfix_slidemoveprojectiles 1\n"
 694 "sv_gameplayfix_upwardvelocityclearsongroundflag 1\n"
 695 "sv_gameplayfix_setmodelrealbox 1\n"
 696 "sv_gameplayfix_droptofloorstartsolid 1\n"
 697 "sv_gameplayfix_droptofloorstartsolid_nudgetocorrect 1\n"
 698 "sv_gameplayfix_noairborncorpse 1\n"
 699 "sv_gameplayfix_noairborncorpse_allowsuspendeditems 1\n"
 700 "sv_gameplayfix_easierwaterjump 1\n"
 701 "sv_gameplayfix_delayprojectiles 1\n"
 702 "sv_gameplayfix_multiplethinksperframe 1\n"
 703 "sv_gameplayfix_fixedcheckwatertransition 1\n"
 704 "sv_gameplayfix_q1bsptracelinereportstexture 1\n"
 705 "sv_gameplayfix_swiminbmodels 1\n"
 706 "sv_gameplayfix_downtracesupportsongroundflag 1\n"
 707 "sys_ticrate 0.01388889\n"
 708 "sv_gameplayfix_q2airaccelerate 1\n"
 709 "sv_gameplayfix_stepmultipletimes 1\n"
 710 "csqc_polygons_defaultmaterial_nocullface 1\n"
 711 "con_chatsound_team_mask 13\n"
 712                                 );
 713                         break;
 714                 case GAME_XONOTIC:
 715                 case GAME_VORETOURNAMENT:
 716                         // compatibility for versions prior to 2020-05-25, this can be overridden in newer versions to get the default behavior and be consistent with FTEQW engine
 717                         Cbuf_InsertText(cmd, "\n"
 718 "csqc_polygons_defaultmaterial_nocullface 1\n"
 719 "con_chatsound_team_mask 13\n"
 720 "sv_qcstats 1\n"
 721 "mod_q1bsp_zero_hullsize_cutoff 8.03125\n"
 722                                 );
 723                         break;
 724                 // Steel Storm: Burning Retribution csqc misinterprets CSQC_InputEvent if type is a value other than 0 or 1
 725                 case GAME_STEELSTORM:
 726                         Cbuf_InsertText(cmd, "\n"
 727 "sv_gameplayfix_blowupfallenzombies 1\n"
 728 "sv_gameplayfix_findradiusdistancetobox 1\n"
 729 "sv_gameplayfix_grenadebouncedownslopes 1\n"
 730 "sv_gameplayfix_slidemoveprojectiles 1\n"
 731 "sv_gameplayfix_upwardvelocityclearsongroundflag 1\n"
 732 "sv_gameplayfix_setmodelrealbox 1\n"
 733 "sv_gameplayfix_droptofloorstartsolid 1\n"
 734 "sv_gameplayfix_droptofloorstartsolid_nudgetocorrect 1\n"
 735 "sv_gameplayfix_noairborncorpse 1\n"
 736 "sv_gameplayfix_noairborncorpse_allowsuspendeditems 1\n"
 737 "sv_gameplayfix_easierwaterjump 1\n"
 738 "sv_gameplayfix_delayprojectiles 1\n"
 739 "sv_gameplayfix_multiplethinksperframe 1\n"
 740 "sv_gameplayfix_fixedcheckwatertransition 1\n"
 741 "sv_gameplayfix_q1bsptracelinereportstexture 1\n"
 742 "sv_gameplayfix_swiminbmodels 1\n"
 743 "sv_gameplayfix_downtracesupportsongroundflag 1\n"
 744 "sys_ticrate 0.01388889\n"
 745 "cl_csqc_generatemousemoveevents 0\n"
 746 "csqc_polygons_defaultmaterial_nocullface 1\n"
 747                                 );
 748                         break;
 749                 case GAME_QUAKE15:
 750                         Cbuf_InsertText(cmd, "\n"
 751 "sv_gameplayfix_impactbeforeonground 1\n"
 752 "sv_gameplayfix_unstickentities 1\n"
 753                         );
 754                         break;
 755                 // Arcane Dimensions V1.80 Patch 1 assumes engines that don't pass values to CSQC_Init() are DP,
 756                 // instead of doing a workaround there we can give it what it really wants (fixes offscreen HUD).
 757                 case GAME_AD:
 758                         Cbuf_InsertText(cmd, "\n"
 759 "csqc_lowres 1\n"
 760                         );
 761                         break;
 762                 default:
 763                         Cbuf_InsertText(cmd, "\n"
 764 "sv_gameplayfix_blowupfallenzombies 1\n"
 765 "sv_gameplayfix_findradiusdistancetobox 1\n"
 766 "sv_gameplayfix_grenadebouncedownslopes 1\n"
 767 "sv_gameplayfix_slidemoveprojectiles 1\n"
 768 "sv_gameplayfix_upwardvelocityclearsongroundflag 1\n"
 769 "sv_gameplayfix_setmodelrealbox 1\n"
 770 "sv_gameplayfix_droptofloorstartsolid 1\n"
 771 "sv_gameplayfix_droptofloorstartsolid_nudgetocorrect 1\n"
 772 "sv_gameplayfix_noairborncorpse 1\n"
 773 "sv_gameplayfix_noairborncorpse_allowsuspendeditems 1\n"
 774 "sv_gameplayfix_easierwaterjump 1\n"
 775 "sv_gameplayfix_delayprojectiles 1\n"
 776 "sv_gameplayfix_multiplethinksperframe 1\n"
 777 "sv_gameplayfix_fixedcheckwatertransition 1\n"
 778 "sv_gameplayfix_q1bsptracelinereportstexture 1\n"
 779 "sv_gameplayfix_swiminbmodels 1\n"
 780 "sv_gameplayfix_downtracesupportsongroundflag 1\n"
 781 "sys_ticrate 0.01388889\n"
 782 "csqc_polygons_defaultmaterial_nocullface 0\n"
 783                                 );
 784                         break;
 785                 }
 786         }
 787 }
 788
 789 /*
 790 ===============
 791 Cmd_Exec_f
 792 ===============
 793 */
 794 static void Cmd_Exec_f (cmd_state_t *cmd)
 795 {
 796         fssearch_t *s;
 797         int i;
 798
 799         if (Cmd_Argc(cmd) != 2)
 800         {
 801                 Con_Print("exec <filename> : execute a script file\n");
 802                 return;
 803         }
 804
 805         s = FS_Search(Cmd_Argv(cmd, 1), true, true, NULL);
 806         if(!s || !s->numfilenames)
 807         {
 808                 Con_Printf(CON_WARN "couldn't exec %s\n",Cmd_Argv(cmd, 1));
 809                 return;
 810         }
 811
 812         for(i = 0; i < s->numfilenames; ++i)
 813                 Cmd_Exec(cmd, s->filenames[i]);
 814
 815         FS_FreeSearch(s);
 816 }
 817
 818
 819 /*
 820 ===============
 821 Cmd_Echo_f
 822
 823 Just prints the rest of the line to the console
 824 ===============
 825 */
 826 static void Cmd_Echo_f (cmd_state_t *cmd)
 827 {
 828         int             i;
 829
 830         for (i=1 ; i<Cmd_Argc(cmd) ; i++)
 831                 Con_Printf("%s ",Cmd_Argv(cmd, i));
 832         Con_Print("\n");
 833 }
 834
 835 // DRESK - 5/14/06
 836 // Support Doom3-style Toggle Console Command
 837 /*
 838 ===============
 839 Cmd_Toggle_f
 840
 841 Toggles a specified console variable amongst the values specified (default is 0 and 1)
 842 ===============
 843 */
 844 static void Cmd_Toggle_f(cmd_state_t *cmd)
 845 {
 846         // Acquire Number of Arguments
 847         int nNumArgs = Cmd_Argc(cmd);
 848
 849         if(nNumArgs == 1)
 850                 // No Arguments Specified; Print Usage
 851                 Con_Print("Toggle Console Variable - Usage\n  toggle <variable> - toggles between 0 and 1\n  toggle <variable> <value> - toggles between 0 and <value>\n  toggle <variable> [string 1] [string 2]...[string n] - cycles through all strings\n");
 852         else
 853         { // Correct Arguments Specified
 854                 // Acquire Potential CVar
 855                 cvar_t* cvCVar = Cvar_FindVar(cmd->cvars, Cmd_Argv(cmd, 1), cmd->cvars_flagsmask);
 856
 857                 if(cvCVar != NULL)
 858                 { // Valid CVar
 859                         if(nNumArgs == 2)
 860                         { // Default Usage
 861                                 if(cvCVar->integer)
 862                                         Cvar_SetValueQuick(cvCVar, 0);
 863                                 else
 864                                         Cvar_SetValueQuick(cvCVar, 1);
 865                         }
 866                         else
 867                         if(nNumArgs == 3)
 868                         { // 0 and Specified Usage
 869                                 if(cvCVar->integer == atoi(Cmd_Argv(cmd, 2) ) )
 870                                         // CVar is Specified Value; // Reset to 0
 871                                         Cvar_SetValueQuick(cvCVar, 0);
 872                                 else
 873                                 if(cvCVar->integer == 0)
 874                                         // CVar is 0; Specify Value
 875                                         Cvar_SetQuick(cvCVar, Cmd_Argv(cmd, 2) );
 876                                 else
 877                                         // CVar does not match; Reset to 0
 878                                         Cvar_SetValueQuick(cvCVar, 0);
 879                         }
 880                         else
 881                         { // Variable Values Specified
 882                                 int nCnt;
 883                                 int bFound = 0;
 884
 885                                 for(nCnt = 2; nCnt < nNumArgs; nCnt++)
 886                                 { // Cycle through Values
 887                                         if( strcmp(cvCVar->string, Cmd_Argv(cmd, nCnt) ) == 0)
 888                                         { // Current Value Located; Increment to Next
 889                                                 if( (nCnt + 1) == nNumArgs)
 890                                                         // Max Value Reached; Reset
 891                                                         Cvar_SetQuick(cvCVar, Cmd_Argv(cmd, 2) );
 892                                                 else
 893                                                         // Next Value
 894                                                         Cvar_SetQuick(cvCVar, Cmd_Argv(cmd, nCnt + 1) );
 895
 896                                                 // End Loop
 897                                                 nCnt = nNumArgs;
 898                                                 // Assign Found
 899                                                 bFound = 1;
 900                                         }
 901                                 }
 902                                 if(!bFound)
 903                                         // Value not Found; Reset to Original
 904                                         Cvar_SetQuick(cvCVar, Cmd_Argv(cmd, 2) );
 905                         }
 906
 907                 }
 908                 else
 909                 { // Invalid CVar
 910                         Con_Printf(CON_WARN "ERROR : CVar '%s' not found\n", Cmd_Argv(cmd, 1) );
 911                 }
 912         }
 913 }
 914
 915 /*
 916 ===============
 917 Cmd_Alias_f
 918
 919 Creates a new command that executes a command string (possibly ; seperated)
 920 ===============
 921 */
 922 static void Cmd_Alias_f (cmd_state_t *cmd)
 923 {
 924         cmd_alias_t     *a;
 925         char            line[MAX_INPUTLINE];
 926         int                     i, c;
 927         const char              *s;
 928         size_t          alloclen;
 929
 930         if (Cmd_Argc(cmd) == 1)
 931         {
 932                 Con_Print("Current alias commands:\n");
 933                 for (a = cmd->userdefined->alias ; a ; a=a->next)
 934                         Con_Printf("%s : %s", a->name, a->value);
 935                 return;
 936         }
 937
 938         s = Cmd_Argv(cmd, 1);
 939         if (strlen(s) >= MAX_ALIAS_NAME)
 940         {
 941                 Con_Print(CON_WARN "Alias name is too long\n");
 942                 return;
 943         }
 944
 945         // if the alias already exists, reuse it
 946         for (a = cmd->userdefined->alias ; a ; a=a->next)
 947         {
 948                 if (!strcmp(s, a->name))
 949                 {
 950                         Z_Free (a->value);
 951                         break;
 952                 }
 953         }
 954
 955         if (!a)
 956         {
 957                 cmd_alias_t *prev, *current;
 958
 959                 a = (cmd_alias_t *)Z_Malloc (sizeof(cmd_alias_t));
 960                 dp_strlcpy (a->name, s, sizeof (a->name));
 961                 // insert it at the right alphanumeric position
 962                 for( prev = NULL, current = cmd->userdefined->alias ; current && strcmp( current->name, a->name ) < 0 ; prev = current, current = current->next )
 963                         ;
 964                 if( prev ) {
 965                         prev->next = a;
 966                 } else {
 967                         cmd->userdefined->alias = a;
 968                 }
 969                 a->next = current;
 970         }
 971
 972
 973 // copy the rest of the command line
 974         line[0] = 0;            // start out with a null string
 975         c = Cmd_Argc(cmd);
 976         for (i=2 ; i < c ; i++)
 977         {
 978                 if (i != 2)
 979                         dp_strlcat (line, " ", sizeof (line));
 980                 dp_strlcat (line, Cmd_Argv(cmd, i), sizeof (line));
 981         }
 982         dp_strlcat (line, "\n", sizeof (line));
 983
 984         alloclen = strlen (line) + 1;
 985         if(alloclen >= 2)
 986                 line[alloclen - 2] = '\n'; // to make sure a newline is appended even if too long
 987         a->value = (char *)Z_Malloc (alloclen);
 988         memcpy (a->value, line, alloclen);
 989 }
 990
 991 /*
 992 ===============
 993 Cmd_UnAlias_f
 994
 995 Remove existing aliases.
 996 ===============
 997 */
 998 static void Cmd_UnAlias_f (cmd_state_t *cmd)
 999 {
1000         cmd_alias_t     *a, *p;
1001         int i;
1002         const char *s;
1003
1004         if(Cmd_Argc(cmd) == 1)
1005         {
1006                 Con_Print("unalias: Usage: unalias alias1 [alias2 ...]\n");
1007                 return;
1008         }
1009
1010         for(i = 1; i < Cmd_Argc(cmd); ++i)
1011         {
1012                 s = Cmd_Argv(cmd, i);
1013                 p = NULL;
1014                 for(a = cmd->userdefined->alias; a; p = a, a = a->next)
1015                 {
1016                         if(!strcmp(s, a->name))
1017                         {
1018                                 if (a->initstate) // we can not remove init aliases
1019                                         continue;
1020                                 if(a == cmd->userdefined->alias)
1021                                         cmd->userdefined->alias = a->next;
1022                                 if(p)
1023                                         p->next = a->next;
1024                                 Z_Free(a->value);
1025                                 Z_Free(a);
1026                                 break;
1027                         }
1028                 }
1029                 if(!a)
1030                         Con_Printf("unalias: %s alias not found\n", s);
1031         }
1032 }
1033
1034 /*
1035 =============================================================================
1036
1037                                         COMMAND EXECUTION
1038
1039 =============================================================================
1040 */
1041
1042 static const char *Cmd_GetDirectCvarValue(cmd_state_t *cmd, const char *varname, cmd_alias_t *alias, qbool *is_multiple)
1043 {
1044         cvar_t *cvar;
1045         long argno;
1046         char *endptr;
1047         static char vabuf[1024]; // cmd_mutex
1048
1049         if(is_multiple)
1050                 *is_multiple = false;
1051
1052         if(!varname || !*varname)
1053                 return NULL;
1054
1055         if(alias)
1056         {
1057                 if(!strcmp(varname, "*"))
1058                 {
1059                         if(is_multiple)
1060                                 *is_multiple = true;
1061                         return Cmd_Args(cmd);
1062                 }
1063                 else if(!strcmp(varname, "#"))
1064                 {
1065                         return va(vabuf, sizeof(vabuf), "%d", Cmd_Argc(cmd));
1066                 }
1067                 else if(varname[strlen(varname) - 1] == '-')
1068                 {
1069                         argno = strtol(varname, &endptr, 10);
1070                         if(endptr == varname + strlen(varname) - 1)
1071                         {
1072                                 // whole string is a number, apart from the -
1073                                 const char *p = Cmd_Args(cmd);
1074                                 for(; argno > 1; --argno)
1075                                         if(!COM_ParseToken_Console(&p))
1076                                                 break;
1077                                 if(p)
1078                                 {
1079                                         if(is_multiple)
1080                                                 *is_multiple = true;
1081
1082                                         // kill pre-argument whitespace
1083                                         for (;*p && ISWHITESPACE(*p);p++)
1084                                                 ;
1085
1086                                         return p;
1087                                 }
1088                         }
1089                 }
1090                 else
1091                 {
1092                         argno = strtol(varname, &endptr, 10);
1093                         if(*endptr == 0)
1094                         {
1095                                 // whole string is a number
1096                                 // NOTE: we already made sure we don't have an empty cvar name!
1097                                 if(argno >= 0 && argno < Cmd_Argc(cmd))
1098                                         return Cmd_Argv(cmd, argno);
1099                         }
1100                 }
1101         }
1102
1103         if((cvar = Cvar_FindVar(cmd->cvars, varname, cmd->cvars_flagsmask)) && !(cvar->flags & CF_PRIVATE))
1104                 return cvar->string;
1105
1106         return NULL;
1107 }
1108
1109 qbool Cmd_QuoteString(char *out, size_t outlen, const char *in, const char *quoteset, qbool putquotes)
1110 {
1111         qbool quote_quot = !!strchr(quoteset, '"');
1112         qbool quote_backslash = !!strchr(quoteset, '\\');
1113         qbool quote_dollar = !!strchr(quoteset, '$');
1114
1115         if(putquotes)
1116         {
1117                 if(outlen <= 2)
1118                 {
1119                         *out++ = 0;
1120                         return false;
1121                 }
1122                 *out++ = '"'; --outlen;
1123                 --outlen;
1124         }
1125
1126         while(*in)
1127         {
1128                 if(*in == '"' && quote_quot)
1129                 {
1130                         if(outlen <= 2)
1131                                 goto fail;
1132                         *out++ = '\\'; --outlen;
1133                         *out++ = '"'; --outlen;
1134                 }
1135                 else if(*in == '\\' && quote_backslash)
1136                 {
1137                         if(outlen <= 2)
1138                                 goto fail;
1139                         *out++ = '\\'; --outlen;
1140                         *out++ = '\\'; --outlen;
1141                 }
1142                 else if(*in == '$' && quote_dollar)
1143                 {
1144                         if(outlen <= 2)
1145                                 goto fail;
1146                         *out++ = '$'; --outlen;
1147                         *out++ = '$'; --outlen;
1148                 }
1149                 else
1150                 {
1151                         if(outlen <= 1)
1152                                 goto fail;
1153                         *out++ = *in; --outlen;
1154                 }
1155                 ++in;
1156         }
1157         if(putquotes)
1158                 *out++ = '"';
1159         *out++ = 0;
1160         return true;
1161 fail:
1162         if(putquotes)
1163                 *out++ = '"';
1164         *out++ = 0;
1165         return false;
1166 }
1167
1168 static const char *Cmd_GetCvarValue(cmd_state_t *cmd, const char *var, size_t varlen, cmd_alias_t *alias)
1169 {
1170         static char varname[MAX_INPUTLINE]; // cmd_mutex
1171         static char varval[MAX_INPUTLINE]; // cmd_mutex
1172         const char *varstr = NULL;
1173         char *varfunc;
1174         qbool required = false;
1175         qbool optional = false;
1176         static char asis[] = "asis"; // just to suppress const char warnings
1177
1178         if(varlen >= MAX_INPUTLINE)
1179                 varlen = MAX_INPUTLINE - 1;
1180         memcpy(varname, var, varlen);
1181         varname[varlen] = 0;
1182         varfunc = strchr(varname, ' ');
1183
1184         if(varfunc)
1185         {
1186                 *varfunc = 0;
1187                 ++varfunc;
1188         }
1189
1190         if(*var == 0)
1191         {
1192                 // empty cvar name?
1193                 if(alias)
1194                         Con_Printf(CON_WARN "Warning: Could not expand $ in alias %s\n", alias->name);
1195                 else
1196                         Con_Printf(CON_WARN "Warning: Could not expand $\n");
1197                 return "$";
1198         }
1199
1200         if(varfunc)
1201         {
1202                 char *p;
1203                 // ? means optional
1204                 while((p = strchr(varfunc, '?')))
1205                 {
1206                         optional = true;
1207                         memmove(p, p+1, strlen(p)); // with final NUL
1208                 }
1209                 // ! means required
1210                 while((p = strchr(varfunc, '!')))
1211                 {
1212                         required = true;
1213                         memmove(p, p+1, strlen(p)); // with final NUL
1214                 }
1215                 // kill spaces
1216                 while((p = strchr(varfunc, ' ')))
1217                 {
1218                         memmove(p, p+1, strlen(p)); // with final NUL
1219                 }
1220                 // if no function is left, NULL it
1221                 if(!*varfunc)
1222                         varfunc = NULL;
1223         }
1224
1225         if(varname[0] == '$')
1226                 varstr = Cmd_GetDirectCvarValue(cmd, Cmd_GetDirectCvarValue(cmd, varname + 1, alias, NULL), alias, NULL);
1227         else
1228         {
1229                 qbool is_multiple = false;
1230                 // Exception: $* and $n- don't use the quoted form by default
1231                 varstr = Cmd_GetDirectCvarValue(cmd, varname, alias, &is_multiple);
1232                 if(is_multiple)
1233                         if(!varfunc)
1234                                 varfunc = asis;
1235         }
1236
1237         if(!varstr)
1238         {
1239                 if(required)
1240                 {
1241                         if(alias)
1242                                 Con_Printf(CON_ERROR "Error: Could not expand $%s in alias %s\n", varname, alias->name);
1243                         else
1244                                 Con_Printf(CON_ERROR "Error: Could not expand $%s\n", varname);
1245                         return NULL;
1246                 }
1247                 else if(optional)
1248                 {
1249                         return "";
1250                 }
1251                 else
1252                 {
1253                         if(alias)
1254                                 Con_Printf(CON_WARN "Warning: Could not expand $%s in alias %s\n", varname, alias->name);
1255                         else
1256                                 Con_Printf(CON_WARN "Warning: Could not expand $%s\n", varname);
1257                         dpsnprintf(varval, sizeof(varval), "$%s", varname);
1258                         return varval;
1259                 }
1260         }
1261
1262         if(!varfunc || !strcmp(varfunc, "q")) // note: quoted form is default, use "asis" to override!
1263         {
1264                 // quote it so it can be used inside double quotes
1265                 // we just need to replace " by \", and of course, double backslashes
1266                 Cmd_QuoteString(varval, sizeof(varval), varstr, "\"\\", false);
1267                 return varval;
1268         }
1269         else if(!strcmp(varfunc, "asis"))
1270         {
1271                 return varstr;
1272         }
1273         else
1274                 Con_Printf("Unknown variable function %s\n", varfunc);
1275
1276         return varstr;
1277 }
1278
1279 /**
1280 Cmd_PreprocessString
1281
1282 Preprocesses strings and replaces $*, $param#, $cvar accordingly. Also strips comments.
1283 Returns the number of bytes written to *outtext excluding the \0 terminator.
1284 */
1285 static size_t Cmd_PreprocessString(cmd_state_t *cmd, const char *intext, char *outtext, unsigned maxoutlen, cmd_alias_t *alias)
1286 {
1287         const char *in;
1288         size_t eat, varlen;
1289         unsigned outlen;
1290         const char *val;
1291
1292         // don't crash if there's no room in the outtext buffer
1293         if( maxoutlen == 0 ) {
1294                 return 0;
1295         }
1296         maxoutlen--; // because of \0
1297
1298         in = intext;
1299         outlen = 0;
1300
1301         while( *in && outlen < maxoutlen ) {
1302                 if( *in == '$' ) {
1303                         // this is some kind of expansion, see what comes after the $
1304                         in++;
1305
1306                         // The console does the following preprocessing:
1307                         //
1308                         // - $$ is transformed to a single dollar sign.
1309                         // - $var or ${var} are expanded to the contents of the named cvar,
1310                         //   with quotation marks and backslashes quoted so it can safely
1311                         //   be used inside quotation marks (and it should always be used
1312                         //   that way)
1313                         // - ${var asis} inserts the cvar value as is, without doing this
1314                         //   quoting
1315                         // - ${var ?} silently expands to the empty string if
1316                         //   $var does not exist
1317                         // - ${var !} fails expansion and executes nothing if
1318                         //   $var does not exist
1319                         // - prefix the cvar name with a dollar sign to do indirection;
1320                         //   for example, if $x has the value timelimit, ${$x} will return
1321                         //   the value of $timelimit
1322                         // - when expanding an alias, the special variable name $* refers
1323                         //   to all alias parameters, and a number refers to that numbered
1324                         //   alias parameter, where the name of the alias is $0, the first
1325                         //   parameter is $1 and so on; as a special case, $* inserts all
1326                         //   parameters, without extra quoting, so one can use $* to just
1327                         //   pass all parameters around. All parameters starting from $n
1328                         //   can be referred to as $n- (so $* is equivalent to $1-).
1329                         // - ${* q} and ${n- q} force quoting anyway
1330                         //
1331                         // Note: when expanding an alias, cvar expansion is done in the SAME step
1332                         // as alias expansion so that alias parameters or cvar values containing
1333                         // dollar signs have no unwanted bad side effects. However, this needs to
1334                         // be accounted for when writing complex aliases. For example,
1335                         //   alias foo "set x NEW; echo $x"
1336                         // actually expands to
1337                         //   "set x NEW; echo OLD"
1338                         // and will print OLD! To work around this, use a second alias:
1339                         //   alias foo "set x NEW; foo2"
1340                         //   alias foo2 "echo $x"
1341                         //
1342                         // Also note: lines starting with alias are exempt from cvar expansion.
1343                         // If you want cvar expansion, write "alias" instead:
1344                         //
1345                         //   set x 1
1346                         //   alias foo "echo $x"
1347                         //   "alias" bar "echo $x"
1348                         //   set x 2
1349                         //
1350                         // foo will print 2, because the variable $x will be expanded when the alias
1351                         // gets expanded. bar will print 1, because the variable $x was expanded
1352                         // at definition time. foo can be equivalently defined as
1353                         //
1354                         //   "alias" foo "echo $$x"
1355                         //
1356                         // because at definition time, $$ will get replaced to a single $.
1357
1358                         if( *in == '$' ) {
1359                                 val = "$";
1360                                 eat = 1;
1361                         } else if(*in == '{') {
1362                                 varlen = strcspn(in + 1, "}");
1363                                 if(in[varlen + 1] == '}')
1364                                 {
1365                                         val = Cmd_GetCvarValue(cmd, in + 1, varlen, alias);
1366                                         if(!val)
1367                                                 return 0;
1368                                         eat = varlen + 2;
1369                                 }
1370                                 else
1371                                 {
1372                                         // ran out of data?
1373                                         val = NULL;
1374                                         eat = varlen + 1;
1375                                 }
1376                         } else {
1377                                 varlen = strspn(in, "#*0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-");
1378                                 val = Cmd_GetCvarValue(cmd, in, varlen, alias);
1379                                 if(!val)
1380                                         return 0;
1381                                 eat = varlen;
1382                         }
1383                         if(val)
1384                         {
1385                                 // insert the cvar value
1386                                 while(*val && outlen < maxoutlen)
1387                                         outtext[outlen++] = *val++;
1388                                 in += eat;
1389                         }
1390                         else
1391                         {
1392                                 // copy the unexpanded text
1393                                 outtext[outlen++] = '$';
1394                                 while(eat && outlen < maxoutlen)
1395                                 {
1396                                         outtext[outlen++] = *in++;
1397                                         --eat;
1398                                 }
1399                         }
1400                 }
1401                 else
1402                         outtext[outlen++] = *in++;
1403         }
1404         outtext[outlen] = '\0';
1405         return outlen;
1406 }
1407
1408 /*
1409 ============
1410 Cmd_ExecuteAlias
1411
1412 Called for aliases and fills in the alias into the cbuffer
1413 ============
1414 */
1415 static void Cmd_ExecuteAlias (cmd_state_t *cmd, cmd_alias_t *alias)
1416 {
1417         static char buffer[ MAX_INPUTLINE ]; // cmd_mutex
1418         static char buffer2[ MAX_INPUTLINE ]; // cmd_mutex
1419         qbool ret = Cmd_PreprocessString( cmd, alias->value, buffer, sizeof(buffer) - 2, alias );
1420         if(!ret)
1421                 return;
1422         // insert at start of command buffer, so that aliases execute in order
1423         // (fixes bug introduced by Black on 20050705)
1424
1425         // Note: Cbuf_PreprocessString will be called on this string AGAIN! So we
1426         // have to make sure that no second variable expansion takes place, otherwise
1427         // alias parameters containing dollar signs can have bad effects.
1428         Cmd_QuoteString(buffer2, sizeof(buffer2), buffer, "$", false);
1429         Cbuf_InsertText(cmd, buffer2);
1430 }
1431
1432 void Cmd_PreprocessAndExecuteString(cmd_state_t *cmd, const char *text, size_t textlen, cmd_source_t src, qbool lockmutex)
1433 {
1434         char preprocessed[MAX_INPUTLINE];
1435         size_t preprocessed_len;
1436         const char *firstchar;
1437
1438         firstchar = text;
1439         while(*firstchar && ISWHITESPACE(*firstchar))
1440                 ++firstchar;
1441         if((strncmp(firstchar, "alias", 5)   || !ISWHITESPACE(firstchar[5]))
1442         && (strncmp(firstchar, "bind", 4)    || !ISWHITESPACE(firstchar[4]))
1443         && (strncmp(firstchar, "in_bind", 7) || !ISWHITESPACE(firstchar[7])))
1444         {
1445                 if((preprocessed_len = Cmd_PreprocessString(cmd, text, preprocessed, sizeof(preprocessed), NULL)))
1446                         Cmd_ExecuteString(cmd, preprocessed, preprocessed_len, src, lockmutex);
1447         }
1448         else
1449                 Cmd_ExecuteString(cmd, text, textlen, src, lockmutex);
1450 }
1451
1452 /*
1453 ========
1454 Cmd_List
1455
1456         CmdList Added by EvilTypeGuy eviltypeguy@qeradiant.com
1457         Thanks to Matthias "Maddes" Buecher, http://www.inside3d.com/qip/
1458
1459 ========
1460 */
1461 static void Cmd_List_f (cmd_state_t *cmd)
1462 {
1463         cmd_function_t *func;
1464         const char *partial;
1465         size_t len;
1466         int count;
1467         qbool ispattern;
1468
1469         if (Cmd_Argc(cmd) > 1)
1470         {
1471                 partial = Cmd_Argv(cmd, 1);
1472                 len = strlen(partial);
1473                 ispattern = (strchr(partial, '*') || strchr(partial, '?'));
1474         }
1475         else
1476         {
1477                 partial = NULL;
1478                 len = 0;
1479                 ispattern = false;
1480         }
1481
1482         count = 0;
1483         for (func = cmd->userdefined->qc_functions; func; func = func->next)
1484         {
1485                 if (partial && (ispattern ? !matchpattern_with_separator(func->name, partial, false, "", false) : strncmp(partial, func->name, len)))
1486                         continue;
1487                 Con_Printf("%s : %s\n", func->name, func->description);
1488                 count++;
1489         }
1490         for (func = cmd->engine_functions; func; func = func->next)
1491         {
1492                 if (partial && (ispattern ? !matchpattern_with_separator(func->name, partial, false, "", false) : strncmp(partial, func->name, len)))
1493                         continue;
1494                 Con_Printf("%s : %s\n", func->name, func->description);
1495                 count++;
1496         }
1497
1498         if (len)
1499         {
1500                 if(ispattern)
1501                         Con_Printf("%i Command%s matching \"%s\"\n\n", count, (count > 1) ? "s" : "", partial);
1502                 else
1503                         Con_Printf("%i Command%s beginning with \"%s\"\n\n", count, (count > 1) ? "s" : "", partial);
1504         }
1505         else
1506                 Con_Printf("%i Command%s\n\n", count, (count > 1) ? "s" : "");
1507 }
1508
1509 static void Cmd_Apropos_f(cmd_state_t *cmd)
1510 {
1511         cmd_function_t *func;
1512         cvar_t *cvar;
1513         cmd_alias_t *alias;
1514         const char *partial;
1515         int count;
1516         qbool ispattern;
1517         char vabuf[1024];
1518
1519         if (Cmd_Argc(cmd) > 1)
1520                 partial = Cmd_Args(cmd);
1521         else
1522         {
1523                 Con_Printf("usage: %s <string>\n",Cmd_Argv(cmd, 0));
1524                 return;
1525         }
1526
1527         ispattern = partial && (strchr(partial, '*') || strchr(partial, '?'));
1528         if(!ispattern)
1529                 partial = va(vabuf, sizeof(vabuf), "*%s*", partial);
1530
1531         count = 0;
1532         for (cvar = cmd->cvars->vars; cvar; cvar = cvar->next)
1533         {
1534                 if (matchpattern_with_separator(cvar->name, partial, true, "", false) ||
1535                     matchpattern_with_separator(cvar->description, partial, true, "", false))
1536                 {
1537                         Con_Printf ("cvar ");
1538                         Cvar_PrintHelp(cvar, cvar->name, true);
1539                         count++;
1540                 }
1541                 for (char **cvar_alias = cvar->aliases; cvar_alias && *cvar_alias; cvar_alias++)
1542                 {
1543                         if (matchpattern_with_separator(*cvar_alias, partial, true, "", false))
1544                         {
1545                                 Con_Printf ("cvar ");
1546                                 Cvar_PrintHelp(cvar, *cvar_alias, true);
1547                                 count++;
1548                         }
1549                 }
1550         }
1551         for (func = cmd->userdefined->qc_functions; func; func = func->next)
1552         {
1553                 if (!matchpattern_with_separator(func->name, partial, true, "", false))
1554                         if (!matchpattern_with_separator(func->description, partial, true, "", false))
1555                                 continue;
1556                 Con_Printf("command ^2%s^7: %s\n", func->name, func->description);
1557                 count++;
1558         }
1559         for (func = cmd->engine_functions; func; func = func->next)
1560         {
1561                 if (!matchpattern_with_separator(func->name, partial, true, "", false))
1562                 if (!matchpattern_with_separator(func->description, partial, true, "", false))
1563                         continue;
1564                 Con_Printf("command ^2%s^7: %s\n", func->name, func->description);
1565                 count++;
1566         }
1567         for (alias = cmd->userdefined->alias; alias; alias = alias->next)
1568         {
1569                 // procede here a bit differently as an alias value always got a final \n
1570                 if (!matchpattern_with_separator(alias->name, partial, true, "", false))
1571                 if (!matchpattern_with_separator(alias->value, partial, true, "\n", false)) // when \n is as separator wildcards don't match it
1572                         continue;
1573                 Con_Printf("alias ^5%s^7: %s", alias->name, alias->value); // do not print an extra \n
1574                 count++;
1575         }
1576         Con_Printf("%i result%s\n\n", count, (count > 1) ? "s" : "");
1577 }
1578
1579 static cmd_state_t *Cmd_AddInterpreter(cmd_buf_t *cbuf, cvar_state_t *cvars, unsigned cvars_flagsmask, unsigned cmds_flagsmask, cmd_userdefined_t *userdefined)
1580 {
1581         cmd_state_t *cmd = (cmd_state_t *)Mem_Alloc(tempmempool, sizeof(cmd_state_t));
1582
1583         cmd->mempool = Mem_AllocPool("commands", 0, NULL);
1584         // space for commands and script files
1585         cmd->cbuf = cbuf;
1586         cmd->null_string = "";
1587
1588         cmd->cvars = cvars;
1589         cmd->cvars_flagsmask = cvars_flagsmask;
1590         cmd->cmd_flagsmask = cmds_flagsmask;
1591         cmd->userdefined = userdefined;
1592
1593         return cmd;
1594 }
1595
1596 /*
1597 ============
1598 Cmd_Init
1599 ============
1600 */
1601 void Cmd_Init(void)
1602 {
1603         cmd_buf_t *cbuf;
1604         unsigned cvars_flagsmask, cmds_flagsmask;
1605
1606         cbuf_mempool = Mem_AllocPool("Command buffer", 0, NULL);
1607         cbuf = (cmd_buf_t *)Mem_Alloc(cbuf_mempool, sizeof(cmd_buf_t));
1608         cbuf->maxsize = CMDBUFSIZE;
1609         cbuf->lock = Thread_CreateMutex();
1610         cbuf->wait = false;
1611         host.cbuf = cbuf;
1612
1613         cbuf->start.prev = cbuf->start.next = &(cbuf->start);
1614         cbuf->deferred.prev = cbuf->deferred.next = &(cbuf->deferred);
1615         cbuf->free.prev = cbuf->free.next = &(cbuf->free);
1616
1617         // FIXME: Get rid of cmd_iter_all eventually. This is just a hack to reduce the amount of work to make the interpreters dynamic.
1618         cmd_iter_all = (cmd_iter_t *)Mem_Alloc(tempmempool, sizeof(cmd_iter_t) * 3);
1619
1620         // local console
1621         if (cls.state == ca_dedicated)
1622         {
1623                 cvars_flagsmask = CF_SERVER;
1624                 cmds_flagsmask = CF_SERVER | CF_SERVER_FROM_CLIENT;
1625         }
1626         else
1627         {
1628                 cvars_flagsmask = CF_CLIENT | CF_SERVER;
1629                 cmds_flagsmask = CF_CLIENT | CF_SERVER | CF_CLIENT_FROM_SERVER | CF_SERVER_FROM_CLIENT;
1630         }
1631         cmd_iter_all[0].cmd = cmd_local = Cmd_AddInterpreter(cbuf, &cvars_all, cvars_flagsmask, cmds_flagsmask, &cmd_userdefined_all);
1632         cmd_local->Handle = Cmd_CL_Callback;
1633
1634         // server commands received from clients have no reason to access cvars, cvar expansion seems perilous.
1635         cmd_iter_all[1].cmd = cmd_serverfromclient = Cmd_AddInterpreter(cbuf, &cvars_null, 0, CF_SERVER_FROM_CLIENT | CF_USERINFO, &cmd_userdefined_null);
1636         cmd_serverfromclient->Handle = Cmd_SV_Callback;
1637
1638         cmd_iter_all[2].cmd = NULL;
1639 //
1640 // register our commands
1641 //
1642         // client-only commands
1643         Cmd_AddCommand(CF_SHARED, "wait", Cmd_Wait_f, "make script execution wait for next rendered frame");
1644
1645         // maintenance commands used for upkeep of cvars and saved configs
1646         Cmd_AddCommand(CF_SHARED, "stuffcmds", Cmd_StuffCmds_f, "execute commandline parameters (must be present in quake.rc script)");
1647         Cmd_AddCommand(CF_SHARED, "cvar_lockdefaults", Cvar_LockDefaults_f, "stores the current values of all cvars into their default values, only used once during startup after parsing default.cfg");
1648         Cmd_AddCommand(CF_SHARED, "cvar_resettodefaults_all", Cvar_ResetToDefaults_All_f, "sets all cvars to their locked default values");
1649         Cmd_AddCommand(CF_SHARED, "cvar_resettodefaults_nosaveonly", Cvar_ResetToDefaults_NoSaveOnly_f, "sets all non-saved cvars to their locked default values (variables that will not be saved to config.cfg)");
1650         Cmd_AddCommand(CF_SHARED, "cvar_resettodefaults_saveonly", Cvar_ResetToDefaults_SaveOnly_f, "sets all saved cvars to their locked default values (variables that will be saved to config.cfg)");
1651
1652         // general console commands used in multiple environments
1653         Cmd_AddCommand(CF_SHARED, "exec", Cmd_Exec_f, "execute a script file");
1654         Cmd_AddCommand(CF_SHARED, "echo",Cmd_Echo_f, "print a message to the console (useful in scripts)");
1655         Cmd_AddCommand(CF_SHARED, "alias",Cmd_Alias_f, "create a script function (parameters are passed in as $X (being X a number), $* for all parameters, $X- for all parameters starting from $X). Without arguments show the list of all alias");
1656         Cmd_AddCommand(CF_SHARED, "unalias",Cmd_UnAlias_f, "remove an alias");
1657         Cmd_AddCommand(CF_SHARED, "set", Cvar_Set_f, "create or change the value of a console variable");
1658         Cmd_AddCommand(CF_SHARED, "seta", Cvar_SetA_f, "create or change the value of a console variable that will be saved to config.cfg");
1659         Cmd_AddCommand(CF_SHARED, "unset", Cvar_Del_f, "delete a cvar (does not work for static ones like _cl_name, or read-only ones)");
1660
1661 #ifdef FILLALLCVARSWITHRUBBISH
1662         Cmd_AddCommand(CF_SHARED, "fillallcvarswithrubbish", Cvar_FillAll_f, "fill all cvars with a specified number of characters to provoke buffer overruns");
1663 #endif /* FILLALLCVARSWITHRUBBISH */
1664
1665         // 2000-01-09 CmdList, CvarList commands By Matthias "Maddes" Buecher
1666         // Added/Modified by EvilTypeGuy eviltypeguy@qeradiant.com
1667         Cmd_AddCommand(CF_SHARED, "cmdlist", Cmd_List_f, "lists all console commands beginning with the specified prefix or matching the specified wildcard pattern");
1668         Cmd_AddCommand(CF_SHARED, "cvarlist", Cvar_List_f, "lists all console variables beginning with the specified prefix or matching the specified wildcard pattern");
1669         Cmd_AddCommand(CF_SHARED, "apropos", Cmd_Apropos_f, "lists all console variables/commands/aliases containing the specified string in the name or description");
1670         Cmd_AddCommand(CF_SHARED, "find", Cmd_Apropos_f, "lists all console variables/commands/aliases containing the specified string in the name or description");
1671
1672         Cmd_AddCommand(CF_SHARED, "defer", Cmd_Defer_f, "execute a command in the future");
1673
1674         // DRESK - 5/14/06
1675         // Support Doom3-style Toggle Command
1676         Cmd_AddCommand(CF_SHARED | CF_CLIENT_FROM_SERVER, "toggle", Cmd_Toggle_f, "toggles a console variable's values (use for more info)");
1677 }
1678
1679 /*
1680 ============
1681 Cmd_Shutdown
1682 ============
1683 */
1684 void Cmd_Shutdown(void)
1685 {
1686         cmd_iter_t *cmd_iter;
1687         for (cmd_iter = cmd_iter_all; cmd_iter->cmd; cmd_iter++)
1688         {
1689                 cmd_state_t *cmd = cmd_iter->cmd;
1690
1691                 if (cmd->cbuf->lock)
1692                 {
1693                         // we usually have this locked when we get here from Host_Quit_f
1694                         Cbuf_Unlock(cmd->cbuf);
1695                 }
1696
1697                 Mem_FreePool(&cmd->mempool);
1698         }
1699 }
1700
1701 /*
1702 ============
1703 Cmd_TokenizeString
1704
1705 Parses the given string into command line tokens.
1706 Takes a null terminated string.  Does not need to be /n terminated.
1707 ============
1708 */
1709 // AK: This function should only be called from ExecuteString because the current design is a bit of an hack
1710 static void Cmd_TokenizeString (cmd_state_t *cmd, const char *text)
1711 {
1712         int l;
1713
1714         cmd->argc = 0;
1715         cmd->args = NULL;
1716         cmd->cmdline = NULL;
1717
1718         while (1)
1719         {
1720                 // skip whitespace up to a /n
1721                 while (*text && ISWHITESPACE(*text) && *text != '\r' && *text != '\n')
1722                         text++;
1723
1724                 // line endings:
1725                 // UNIX: \n
1726                 // Mac: \r
1727                 // Windows: \r\n
1728                 if (*text == '\n' || *text == '\r')
1729                 {
1730                         // a newline separates commands in the buffer
1731                         if (*text == '\r' && text[1] == '\n')
1732                                 text++;
1733                         text++;
1734                         break;
1735                 }
1736
1737                 if (!*text)
1738                         return;
1739
1740                 if(!cmd->argc)
1741                         cmd->cmdline = text;
1742                 if (cmd->argc == 1)
1743                         cmd->args = text;
1744
1745                 if (!COM_ParseToken_Console(&text))
1746                         return;
1747
1748                 if (cmd->argc < MAX_ARGS)
1749                 {
1750                         l = (int)strlen(com_token) + 1;
1751                         if (cmd->cbuf->tokenizebufferpos + l > CMD_TOKENIZELENGTH)
1752                         {
1753                                 Con_Printf(CON_WARN "Cmd_TokenizeString: ran out of %i character buffer space for command arguments\n", CMD_TOKENIZELENGTH);
1754                                 break;
1755                         }
1756                         memcpy (cmd->cbuf->tokenizebuffer + cmd->cbuf->tokenizebufferpos, com_token, l);
1757                         cmd->argv[cmd->argc] = cmd->cbuf->tokenizebuffer + cmd->cbuf->tokenizebufferpos;
1758                         cmd->cbuf->tokenizebufferpos += l;
1759                         cmd->argc++;
1760                 }
1761         }
1762 }
1763
1764
1765 /*
1766 ============
1767 Cmd_AddCommand
1768 ============
1769 */
1770 void Cmd_AddCommand(unsigned flags, const char *cmd_name, xcommand_t function, const char *description)
1771 {
1772         cmd_function_t *func;
1773         cmd_function_t *prev, *current;
1774         cmd_state_t *cmd;
1775         int i;
1776
1777         for (i = 0; i < 2; i++)
1778         {
1779                 cmd = cmd_iter_all[i].cmd;
1780                 if (flags & cmd->cmd_flagsmask)
1781                 {
1782                         // fail if the command is a variable name
1783                         if (Cvar_FindVar(cmd->cvars, cmd_name, ~0))
1784                         {
1785                                 Con_Printf(CON_WARN "Cmd_AddCommand: %s already defined as a var\n", cmd_name);
1786                                 return;
1787                         }
1788
1789                         if (function)
1790                         {
1791                                 // fail if the command already exists in this interpreter
1792                                 for (func = cmd->engine_functions; func; func = func->next)
1793                                 {
1794                                         if (!strcmp(cmd_name, func->name))
1795                                         {
1796                                                 Con_Printf(CON_WARN "Cmd_AddCommand: %s already defined\n", cmd_name);
1797                                                 continue;
1798                                         }
1799                                 }
1800
1801                                 func = (cmd_function_t *)Mem_Alloc(cmd->mempool, sizeof(cmd_function_t));
1802                                 func->flags = flags;
1803                                 func->name = cmd_name;
1804                                 func->function = function;
1805                                 func->description = description;
1806                                 func->next = cmd->engine_functions;
1807
1808                                 // insert it at the right alphanumeric position
1809                                 for (prev = NULL, current = cmd->engine_functions; current && strcmp(current->name, func->name) < 0; prev = current, current = current->next)
1810                                         ;
1811                                 if (prev) {
1812                                         prev->next = func;
1813                                 }
1814                                 else {
1815                                         cmd->engine_functions = func;
1816                                 }
1817                                 func->next = current;
1818                         }
1819                         else
1820                         {
1821                                 // mark qcfunc if the function already exists in the qc_functions list
1822                                 for (func = cmd->userdefined->qc_functions; func; func = func->next)
1823                                 {
1824                                         if (!strcmp(cmd_name, func->name))
1825                                         {
1826                                                 func->qcfunc = true; //[515]: csqc
1827                                                 continue;
1828                                         }
1829                                 }
1830
1831                                 func = (cmd_function_t *)Mem_Alloc(cmd->mempool, sizeof(cmd_function_t));
1832                                 func->flags = flags;
1833                                 func->name = cmd_name;
1834                                 func->function = function;
1835                                 func->description = description;
1836                                 func->qcfunc = true; //[515]: csqc
1837                                 func->next = cmd->userdefined->qc_functions;
1838
1839                                 // bones_was_here: if this QC command overrides an engine command, store its pointer
1840                                 // to avoid doing this search at invocation if QC declines to handle this command.
1841                                 for (cmd_function_t *f = cmd->engine_functions; f; f = f->next)
1842                                 {
1843                                         if (!strcmp(cmd_name, f->name))
1844                                         {
1845                                                 Con_DPrintf("Adding QC override of engine command %s\n", cmd_name);
1846                                                 func->overridden = f;
1847                                                 break;
1848                                         }
1849                                 }
1850
1851                                 // insert it at the right alphanumeric position
1852                                 for (prev = NULL, current = cmd->userdefined->qc_functions; current && strcmp(current->name, func->name) < 0; prev = current, current = current->next)
1853                                         ;
1854                                 if (prev) {
1855                                         prev->next = func;
1856                                 }
1857                                 else {
1858                                         cmd->userdefined->qc_functions = func;
1859                                 }
1860                                 func->next = current;
1861                         }
1862                 }
1863         }
1864 }
1865
1866 /*
1867 ============
1868 Cmd_Exists
1869 ============
1870 */
1871 qbool Cmd_Exists (cmd_state_t *cmd, const char *cmd_name)
1872 {
1873         cmd_function_t  *func;
1874
1875         for (func = cmd->userdefined->qc_functions; func; func = func->next)
1876                 if (!strcmp(cmd_name, func->name))
1877                         return true;
1878
1879         for (func=cmd->engine_functions ; func ; func=func->next)
1880                 if (!strcmp (cmd_name,func->name))
1881                         return true;
1882
1883         return false;
1884 }
1885
1886
1887 /*
1888 ============
1889 Cmd_CompleteCommand
1890 ============
1891 */
1892 const char *Cmd_CompleteCommand (cmd_state_t *cmd, const char *partial)
1893 {
1894         cmd_function_t *func;
1895         size_t len;
1896
1897         len = strlen(partial);
1898
1899         if (!len)
1900                 return NULL;
1901
1902 // check functions
1903         for (func = cmd->userdefined->qc_functions; func; func = func->next)
1904                 if (!strncasecmp(partial, func->name, len))
1905                         return func->name;
1906
1907         for (func = cmd->engine_functions; func; func = func->next)
1908                 if (!strncasecmp(partial, func->name, len))
1909                         return func->name;
1910
1911         return NULL;
1912 }
1913
1914 /*
1915         Cmd_CompleteCountPossible
1916
1917         New function for tab-completion system
1918         Added by EvilTypeGuy
1919         Thanks to Fett erich@heintz.com
1920         Thanks to taniwha
1921
1922 */
1923 int Cmd_CompleteCountPossible (cmd_state_t *cmd, const char *partial)
1924 {
1925         cmd_function_t *func;
1926         size_t len;
1927         int h;
1928
1929         h = 0;
1930         len = strlen(partial);
1931
1932         if (!len)
1933                 return 0;
1934
1935         // Loop through the command list and count all partial matches
1936         for (func = cmd->userdefined->qc_functions; func; func = func->next)
1937                 if (!strncasecmp(partial, func->name, len))
1938                         h++;
1939
1940         for (func = cmd->engine_functions; func; func = func->next)
1941                 if (!strncasecmp(partial, func->name, len))
1942                         h++;
1943
1944         return h;
1945 }
1946
1947 /*
1948         Cmd_CompleteBuildList
1949
1950         New function for tab-completion system
1951         Added by EvilTypeGuy
1952         Thanks to Fett erich@heintz.com
1953         Thanks to taniwha
1954
1955 */
1956 const char **Cmd_CompleteBuildList (cmd_state_t *cmd, const char *partial)
1957 {
1958         cmd_function_t *func;
1959         size_t len = 0;
1960         size_t bpos = 0;
1961         size_t sizeofbuf = (Cmd_CompleteCountPossible (cmd, partial) + 1) * sizeof (const char *);
1962         const char **buf;
1963
1964         len = strlen(partial);
1965         buf = (const char **)Mem_Alloc(tempmempool, sizeofbuf + sizeof (const char *));
1966         // Loop through the functions lists and print all matches
1967         for (func = cmd->userdefined->qc_functions; func; func = func->next)
1968                 if (!strncasecmp(partial, func->name, len))
1969                         buf[bpos++] = func->name;
1970         for (func = cmd->engine_functions; func; func = func->next)
1971                 if (!strncasecmp(partial, func->name, len))
1972                         buf[bpos++] = func->name;
1973
1974         buf[bpos] = NULL;
1975         return buf;
1976 }
1977
1978 // written by LadyHavoc
1979 void Cmd_CompleteCommandPrint (cmd_state_t *cmd, const char *partial)
1980 {
1981         cmd_function_t *func;
1982         size_t len = strlen(partial);
1983         // Loop through the command list and print all matches
1984         for (func = cmd->userdefined->qc_functions; func; func = func->next)
1985                 if (!strncasecmp(partial, func->name, len))
1986                         Con_Printf("^2%s^7: %s\n", func->name, func->description);
1987         for (func = cmd->engine_functions; func; func = func->next)
1988                 if (!strncasecmp(partial, func->name, len))
1989                         Con_Printf("^2%s^7: %s\n", func->name, func->description);
1990 }
1991
1992 /*
1993         Cmd_CompleteAlias
1994
1995         New function for tab-completion system
1996         Added by EvilTypeGuy
1997         Thanks to Fett erich@heintz.com
1998         Thanks to taniwha
1999
2000 */
2001 const char *Cmd_CompleteAlias (cmd_state_t *cmd, const char *partial)
2002 {
2003         cmd_alias_t *alias;
2004         size_t len;
2005
2006         len = strlen(partial);
2007
2008         if (!len)
2009                 return NULL;
2010
2011         // Check functions
2012         for (alias = cmd->userdefined->alias; alias; alias = alias->next)
2013                 if (!strncasecmp(partial, alias->name, len))
2014                         return alias->name;
2015
2016         return NULL;
2017 }
2018
2019 // written by LadyHavoc
2020 void Cmd_CompleteAliasPrint (cmd_state_t *cmd, const char *partial)
2021 {
2022         cmd_alias_t *alias;
2023         size_t len = strlen(partial);
2024         // Loop through the alias list and print all matches
2025         for (alias = cmd->userdefined->alias; alias; alias = alias->next)
2026                 if (!strncasecmp(partial, alias->name, len))
2027                         Con_Printf("^5%s^7: %s", alias->name, alias->value);
2028 }
2029
2030
2031 /*
2032         Cmd_CompleteAliasCountPossible
2033
2034         New function for tab-completion system
2035         Added by EvilTypeGuy
2036         Thanks to Fett erich@heintz.com
2037         Thanks to taniwha
2038
2039 */
2040 int Cmd_CompleteAliasCountPossible (cmd_state_t *cmd, const char *partial)
2041 {
2042         cmd_alias_t     *alias;
2043         size_t          len;
2044         int                     h;
2045
2046         h = 0;
2047
2048         len = strlen(partial);
2049
2050         if (!len)
2051                 return 0;
2052
2053         // Loop through the command list and count all partial matches
2054         for (alias = cmd->userdefined->alias; alias; alias = alias->next)
2055                 if (!strncasecmp(partial, alias->name, len))
2056                         h++;
2057
2058         return h;
2059 }
2060
2061 /*
2062         Cmd_CompleteAliasBuildList
2063
2064         New function for tab-completion system
2065         Added by EvilTypeGuy
2066         Thanks to Fett erich@heintz.com
2067         Thanks to taniwha
2068
2069 */
2070 const char **Cmd_CompleteAliasBuildList (cmd_state_t *cmd, const char *partial)
2071 {
2072         cmd_alias_t *alias;
2073         size_t len = 0;
2074         size_t bpos = 0;
2075         size_t sizeofbuf = (Cmd_CompleteAliasCountPossible (cmd, partial) + 1) * sizeof (const char *);
2076         const char **buf;
2077
2078         len = strlen(partial);
2079         buf = (const char **)Mem_Alloc(tempmempool, sizeofbuf + sizeof (const char *));
2080         // Loop through the alias list and print all matches
2081         for (alias = cmd->userdefined->alias; alias; alias = alias->next)
2082                 if (!strncasecmp(partial, alias->name, len))
2083                         buf[bpos++] = alias->name;
2084
2085         buf[bpos] = NULL;
2086         return buf;
2087 }
2088
2089 // TODO: Make this more generic?
2090 void Cmd_ClearCSQCCommands (cmd_state_t *cmd)
2091 {
2092         cmd_function_t *func;
2093         cmd_function_t **next = &cmd->userdefined->qc_functions;
2094
2095         while(*next)
2096         {
2097                 func = *next;
2098                 *next = func->next;
2099                 Z_Free(func);
2100         }
2101 }
2102
2103 extern cvar_t sv_cheats;
2104
2105 /*
2106  * Cloudwalk FIXME: This idea sounded great in my head but...
2107  * How do we handle commands that can be received by the client,
2108  * but which the server can also execute locally?
2109  *
2110  * If we create a callback where the engine will forward to server
2111  * but try to execute the command locally if it's dedicated,
2112  * we're back to intermixing client and server code which I'm
2113  * trying to avoid. There's no other way I can think of to
2114  * implement that behavior that doesn't involve an #ifdef, or
2115  * making a mess of hooks.
2116  */
2117 qbool Cmd_Callback(cmd_state_t *cmd, cmd_function_t *func)
2118 {
2119         if (func->function)
2120                 func->function(cmd);
2121         else
2122                 Con_Printf(CON_WARN "Command \"%s\" can not be executed\n", Cmd_Argv(cmd, 0));
2123         return true;
2124 }
2125
2126 qbool Cmd_CL_Callback(cmd_state_t *cmd, cmd_function_t *func, const char *text, size_t textlen, cmd_source_t src)
2127 {
2128         // TODO: Assign these functions to QC commands directly?
2129         if(func->qcfunc)
2130         {
2131                 if(((func->flags & CF_CLIENT) && CL_VM_ConsoleCommand(text, textlen)) ||
2132                    ((func->flags & CF_SERVER) && SV_VM_ConsoleCommand(text, textlen)))
2133                         return true;
2134
2135                 if (func->overridden) // If this QC command overrides an engine command,
2136                         func = func->overridden; // fall back to that command.
2137         }
2138         if (func->flags & CF_SERVER_FROM_CLIENT)
2139         {
2140                 if(host_isclient.integer)
2141                 {
2142                         CL_ForwardToServer_f(cmd);
2143                         return true;
2144                 }
2145                 else if(!(func->flags & CF_SERVER))
2146                 {
2147                         Con_Printf(CON_WARN "Cannot execute client commands from a dedicated server console.\n");
2148                         return true;
2149                 }
2150         }
2151         return Cmd_Callback(cmd, func);
2152 }
2153
2154 qbool Cmd_SV_Callback(cmd_state_t *cmd, cmd_function_t *func, const char *text, size_t textlen, cmd_source_t src)
2155 {
2156         if(func->qcfunc && (func->flags & CF_SERVER))
2157                 return SV_VM_ConsoleCommand(text, textlen);
2158         else if (src == src_client)
2159         {
2160                 if((func->flags & CF_CHEAT) && !sv_cheats.integer)
2161                         SV_ClientPrintf(CON_WARN "No cheats allowed. The server must have sv_cheats set to 1\n");
2162                 else
2163                         func->function(cmd);
2164                 return true;
2165         }
2166         return false;
2167 }
2168
2169 /*
2170 ============
2171 Cmd_ExecuteString
2172
2173 A complete command line has been parsed, so try to execute it
2174 FIXME: lookupnoadd the token to speed search?
2175 ============
2176 */
2177 void Cmd_ExecuteString(cmd_state_t *cmd, const char *text, size_t textlen, cmd_source_t src, qbool lockmutex)
2178 {
2179         int oldpos;
2180         cmd_function_t *func;
2181         cmd_alias_t *a;
2182
2183         if (lockmutex)
2184                 Cbuf_Lock(cmd->cbuf);
2185         oldpos = cmd->cbuf->tokenizebufferpos;
2186         cmd->source = src;
2187
2188         Cmd_TokenizeString (cmd, text);
2189
2190 // execute the command line
2191         if (!Cmd_Argc(cmd))
2192                 goto done; // no tokens
2193
2194 // check functions
2195         for (func = cmd->userdefined->qc_functions; func; func = func->next)
2196                 if (!strcasecmp(cmd->argv[0], func->name))
2197                         if(cmd->Handle(cmd, func, text, textlen, src))
2198                                 goto functions_done;
2199
2200         for (func = cmd->engine_functions; func; func=func->next)
2201                 if (!strcasecmp (cmd->argv[0], func->name))
2202                         if(cmd->Handle(cmd, func, text, textlen, src))
2203                                 goto functions_done;
2204
2205 functions_done:
2206         // If it's a client command and wasn't found and handled, say so.
2207         // Also don't let clients call server aliases.
2208         if (cmd->source == src_client)
2209         {
2210                 if (!func)
2211                         Con_Printf("Client \"%s\" tried to execute \"%s\"\n", host_client->name, text);
2212                 goto done;
2213         }
2214
2215 // check alias
2216         // Execute any alias with the same name as a command after the command.
2217         for (a=cmd->userdefined->alias ; a ; a=a->next)
2218         {
2219                 if (!strcasecmp (cmd->argv[0], a->name))
2220                 {
2221                         Cmd_ExecuteAlias(cmd, a);
2222                         goto done;
2223                 }
2224         }
2225
2226         // If the command was found and handled don't try to handle it as a cvar.
2227         if (func)
2228                 goto done;
2229
2230 // check cvars
2231         // Xonotic is still maintained so we don't want to hide problems from getting fixed
2232         if (!Cvar_Command(cmd) && (host.framecount > 0 || gamemode == GAME_XONOTIC))
2233                 Con_Printf(CON_WARN "Unknown command \"%s\"\n", Cmd_Argv(cmd, 0));
2234 done:
2235         cmd->cbuf->tokenizebufferpos = oldpos;
2236         if (lockmutex)
2237                 Cbuf_Unlock(cmd->cbuf);
2238 }
2239
2240 /*
2241 ================
2242 Cmd_CheckParm
2243
2244 Returns the position (1 to argc-1) in the command's argument list
2245 where the given parameter apears, or 0 if not present
2246 ================
2247 */
2248
2249 int Cmd_CheckParm (cmd_state_t *cmd, const char *parm)
2250 {
2251         int i;
2252
2253         if (!parm)
2254         {
2255                 Con_Printf(CON_WARN "Cmd_CheckParm: NULL");
2256                 return 0;
2257         }
2258
2259         for (i = 1; i < Cmd_Argc (cmd); i++)
2260                 if (!strcasecmp (parm, Cmd_Argv(cmd, i)))
2261                         return i;
2262
2263         return 0;
2264 }
2265
2266
2267
2268 void Cmd_SaveInitState(void)
2269 {
2270         cmd_iter_t *cmd_iter;
2271         for (cmd_iter = cmd_iter_all; cmd_iter->cmd; cmd_iter++)
2272         {
2273                 cmd_state_t *cmd = cmd_iter->cmd;
2274                 cmd_function_t *f;
2275                 cmd_alias_t *a;
2276                 for (f = cmd->userdefined->qc_functions; f; f = f->next)
2277                         f->initstate = true;
2278                 for (f = cmd->engine_functions; f; f = f->next)
2279                         f->initstate = true;
2280                 for (a = cmd->userdefined->alias; a; a = a->next)
2281                 {
2282                         a->initstate = true;
2283                         a->initialvalue = Mem_strdup(zonemempool, a->value);
2284                 }
2285         }
2286         Cvar_SaveInitState(&cvars_all);
2287 }
2288
2289 void Cmd_RestoreInitState(void)
2290 {
2291         cmd_iter_t *cmd_iter;
2292         for (cmd_iter = cmd_iter_all; cmd_iter->cmd; cmd_iter++)
2293         {
2294                 cmd_state_t *cmd = cmd_iter->cmd;
2295                 cmd_function_t *f, **fp;
2296                 cmd_alias_t *a, **ap;
2297                 for (fp = &cmd->userdefined->qc_functions; (f = *fp);)
2298                 {
2299                         if (f->initstate)
2300                                 fp = &f->next;
2301                         else
2302                         {
2303                                 // destroy this command, it didn't exist at init
2304                                 Con_DPrintf("Cmd_RestoreInitState: Destroying command %s\n", f->name);
2305                                 *fp = f->next;
2306                                 Z_Free(f);
2307                         }
2308                 }
2309                 for (fp = &cmd->engine_functions; (f = *fp);)
2310                 {
2311                         if (f->initstate)
2312                                 fp = &f->next;
2313                         else
2314                         {
2315                                 // destroy this command, it didn't exist at init
2316                                 Con_DPrintf("Cmd_RestoreInitState: Destroying command %s\n", f->name);
2317                                 *fp = f->next;
2318                                 Z_Free(f);
2319                         }
2320                 }
2321                 for (ap = &cmd->userdefined->alias; (a = *ap);)
2322                 {
2323                         if (a->initstate)
2324                         {
2325                                 // restore this alias, it existed at init
2326                                 if (strcmp(a->value ? a->value : "", a->initialvalue ? a->initialvalue : ""))
2327                                 {
2328                                         Con_DPrintf("Cmd_RestoreInitState: Restoring alias %s\n", a->name);
2329                                         if (a->value)
2330                                                 Z_Free(a->value);
2331                                         a->value = Mem_strdup(zonemempool, a->initialvalue);
2332                                 }
2333                                 ap = &a->next;
2334                         }
2335                         else
2336                         {
2337                                 // free this alias, it didn't exist at init...
2338                                 Con_DPrintf("Cmd_RestoreInitState: Destroying alias %s\n", a->name);
2339                                 *ap = a->next;
2340                                 if (a->value)
2341                                         Z_Free(a->value);
2342                                 Z_Free(a);
2343                         }
2344                 }
2345         }
2346         Cvar_RestoreInitState(&cvars_all);
2347 }
2348
2349 void Cmd_NoOperation_f(cmd_state_t *cmd)
2350 {
2351 }