exec.c

   1 /*
   2  * Copyright (C) 2012
   3  *     Wolfgang Bumiller
   4  *     Dale Weiler
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy of
   7  * this software and associated documentation files (the "Software"), to deal in
   8  * the Software without restriction, including without limitation the rights to
   9  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  10  * of the Software, and to permit persons to whom the Software is furnished to do
  11  * so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in all
  14  * copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24 #ifndef QCVM_LOOP
  25 #include <errno.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <stdarg.h>
  29
  30 #include "gmqcc.h"
  31
  32 static void loaderror(const char *fmt, ...)
  33 {
  34     int     err = errno;
  35     va_list ap;
  36     va_start(ap, fmt);
  37     vprintf(fmt, ap);
  38     va_end(ap);
  39     printf(": %s\n", strerror(err));
  40 }
  41
  42 static void qcvmerror(qc_program *prog, const char *fmt, ...)
  43 {
  44     va_list ap;
  45
  46     prog->vmerror++;
  47
  48     va_start(ap, fmt);
  49     vprintf(fmt, ap);
  50     va_end(ap);
  51     putchar('\n');
  52 }
  53
  54 qc_program* prog_load(const char *filename)
  55 {
  56     qc_program   *prog;
  57     prog_header   header;
  58     FILE         *file   = file_open(filename, "rb");
  59
  60     if (!file)
  61         return NULL;
  62
  63     if (file_read(&header, sizeof(header), 1, file) != 1) {
  64         loaderror("failed to read header from '%s'", filename);
  65         file_close(file);
  66         return NULL;
  67     }
  68
  69     if (header.version != 6) {
  70         loaderror("header says this is a version %i progs, we need version 6\n", header.version);
  71         file_close(file);
  72         return NULL;
  73     }
  74
  75     prog = (qc_program*)mem_a(sizeof(qc_program));
  76     if (!prog) {
  77         file_close(file);
  78         printf("failed to allocate program data\n");
  79         return NULL;
  80     }
  81     memset(prog, 0, sizeof(*prog));
  82
  83     prog->entityfields = header.entfield;
  84     prog->crc16 = header.crc16;
  85
  86     prog->filename = util_strdup(filename);
  87     if (!prog->filename) {
  88         loaderror("failed to store program name");
  89         goto error;
  90     }
  91
  92 #define read_data(hdrvar, progvar, reserved)                           \
  93     if (file_seek(file, header.hdrvar.offset, SEEK_SET) != 0) {        \
  94         loaderror("seek failed");                                      \
  95         goto error;                                                    \
  96     }                                                                  \
  97     if (file_read (                                                    \
  98             vec_add(prog->progvar, header.hdrvar.length + reserved),   \
  99             sizeof(*prog->progvar),                                    \
 100             header.hdrvar.length,                                      \
 101             file                                                       \
 102         )!= header.hdrvar.length                                       \
 103     ) {                                                                \
 104         loaderror("read failed");                                      \
 105         goto error;                                                    \
 106     }
 107 #define read_data1(x)    read_data(x, x, 0)
 108 #define read_data2(x, y) read_data(x, x, y)
 109
 110     read_data (statements, code, 0);
 111     read_data1(defs);
 112     read_data1(fields);
 113     read_data1(functions);
 114     read_data1(strings);
 115     read_data2(globals, 2); /* reserve more in case a RETURN using with the global at "the end" exists */
 116
 117     file_close(file);
 118
 119     /* profile counters */
 120     memset(vec_add(prog->profile, vec_size(prog->code)), 0, sizeof(prog->profile[0]) * vec_size(prog->code));
 121
 122     /* Add tempstring area */
 123     prog->tempstring_start = vec_size(prog->strings);
 124     prog->tempstring_at    = vec_size(prog->strings);
 125     memset(vec_add(prog->strings, 16*1024), 0, 16*1024);
 126
 127     /* spawn the world entity */
 128     vec_push(prog->entitypool, true);
 129     memset(vec_add(prog->entitydata, prog->entityfields), 0, prog->entityfields * sizeof(prog->entitydata[0]));
 130     prog->entities = 1;
 131
 132     return prog;
 133
 134 error:
 135     if (prog->filename)
 136         mem_d(prog->filename);
 137     vec_free(prog->code);
 138     vec_free(prog->defs);
 139     vec_free(prog->fields);
 140     vec_free(prog->functions);
 141     vec_free(prog->strings);
 142     vec_free(prog->globals);
 143     vec_free(prog->entitydata);
 144     vec_free(prog->entitypool);
 145     mem_d(prog);
 146     return NULL;
 147 }
 148
 149 void prog_delete(qc_program *prog)
 150 {
 151     if (prog->filename) mem_d(prog->filename);
 152     vec_free(prog->code);
 153     vec_free(prog->defs);
 154     vec_free(prog->fields);
 155     vec_free(prog->functions);
 156     vec_free(prog->strings);
 157     vec_free(prog->globals);
 158     vec_free(prog->entitydata);
 159     vec_free(prog->entitypool);
 160     vec_free(prog->localstack);
 161     vec_free(prog->stack);
 162     vec_free(prog->profile);
 163     mem_d(prog);
 164 }
 165
 166 /***********************************************************************
 167  * VM code
 168  */
 169
 170 char* prog_getstring(qc_program *prog, qcint str)
 171 {
 172     /* cast for return required for C++ */
 173     if (str < 0 || str >= (qcint)vec_size(prog->strings))
 174         return (char*)"<<<invalid string>>>";
 175     return prog->strings + str;
 176 }
 177
 178 prog_section_def* prog_entfield(qc_program *prog, qcint off)
 179 {
 180     size_t i;
 181     for (i = 0; i < vec_size(prog->fields); ++i) {
 182         if (prog->fields[i].offset == off)
 183             return (prog->fields + i);
 184     }
 185     return NULL;
 186 }
 187
 188 prog_section_def* prog_getdef(qc_program *prog, qcint off)
 189 {
 190     size_t i;
 191     for (i = 0; i < vec_size(prog->defs); ++i) {
 192         if (prog->defs[i].offset == off)
 193             return (prog->defs + i);
 194     }
 195     return NULL;
 196 }
 197
 198 qcany* prog_getedict(qc_program *prog, qcint e)
 199 {
 200     if (e >= (qcint)vec_size(prog->entitypool)) {
 201         prog->vmerror++;
 202         printf("Accessing out of bounds edict %i\n", (int)e);
 203         e = 0;
 204     }
 205     return (qcany*)(prog->entitydata + (prog->entityfields * e));
 206 }
 207
 208 qcint prog_spawn_entity(qc_program *prog)
 209 {
 210     char  *data;
 211     qcint  e;
 212     for (e = 0; e < (qcint)vec_size(prog->entitypool); ++e) {
 213         if (!prog->entitypool[e]) {
 214             data = (char*)(prog->entitydata + (prog->entityfields * e));
 215             memset(data, 0, prog->entityfields * sizeof(qcint));
 216             return e;
 217         }
 218     }
 219     vec_push(prog->entitypool, true);
 220     prog->entities++;
 221     data = (char*)vec_add(prog->entitydata, prog->entityfields);
 222     memset(data, 0, prog->entityfields * sizeof(qcint));
 223     return e;
 224 }
 225
 226 void prog_free_entity(qc_program *prog, qcint e)
 227 {
 228     if (!e) {
 229         prog->vmerror++;
 230         printf("Trying to free world entity\n");
 231         return;
 232     }
 233     if (e >= (qcint)vec_size(prog->entitypool)) {
 234         prog->vmerror++;
 235         printf("Trying to free out of bounds entity\n");
 236         return;
 237     }
 238     if (!prog->entitypool[e]) {
 239         prog->vmerror++;
 240         printf("Double free on entity\n");
 241         return;
 242     }
 243     prog->entitypool[e] = false;
 244 }
 245
 246 qcint prog_tempstring(qc_program *prog, const char *_str)
 247 {
 248     /* we don't access it, but the macro-generated functions don't use
 249      * const
 250      */
 251     char *str = (char*)_str;
 252
 253     size_t len = strlen(str);
 254     size_t at = prog->tempstring_at;
 255
 256     /* when we reach the end we start over */
 257     if (at + len >= vec_size(prog->strings))
 258         at = prog->tempstring_start;
 259
 260     /* when it doesn't fit, reallocate */
 261     if (at + len >= vec_size(prog->strings))
 262     {
 263         (void)vec_add(prog->strings, len+1);
 264         memcpy(prog->strings + at, str, len+1);
 265         return at;
 266     }
 267
 268     /* when it fits, just copy */
 269     memcpy(prog->strings + at, str, len+1);
 270     prog->tempstring_at += len+1;
 271     return at;
 272 }
 273
 274 static size_t print_escaped_string(const char *str, size_t maxlen)
 275 {
 276     size_t len = 2;
 277     putchar('"');
 278     --maxlen; /* because we're lazy and have escape sequences */
 279     while (*str) {
 280         if (len >= maxlen) {
 281             putchar('.');
 282             putchar('.');
 283             putchar('.');
 284             len += 3;
 285             break;
 286         }
 287         switch (*str) {
 288             case '\a': len += 2; putchar('\\'); putchar('a'); break;
 289             case '\b': len += 2; putchar('\\'); putchar('b'); break;
 290             case '\r': len += 2; putchar('\\'); putchar('r'); break;
 291             case '\n': len += 2; putchar('\\'); putchar('n'); break;
 292             case '\t': len += 2; putchar('\\'); putchar('t'); break;
 293             case '\f': len += 2; putchar('\\'); putchar('f'); break;
 294             case '\v': len += 2; putchar('\\'); putchar('v'); break;
 295             case '\\': len += 2; putchar('\\'); putchar('\\'); break;
 296             case '"':  len += 2; putchar('\\'); putchar('"'); break;
 297             default:
 298                 ++len;
 299                 putchar(*str);
 300                 break;
 301         }
 302         ++str;
 303     }
 304     putchar('"');
 305     return len;
 306 }
 307
 308 static void trace_print_global(qc_program *prog, unsigned int glob, int vtype)
 309 {
 310     static char spaces[28+1] = "                            ";
 311     prog_section_def *def;
 312     qcany    *value;
 313     int       len;
 314
 315     if (!glob) {
 316         len = printf("<null>,");
 317         goto done;
 318     }
 319
 320     def = prog_getdef(prog, glob);
 321     value = (qcany*)(&prog->globals[glob]);
 322
 323     len = printf("[@%u] ", glob);
 324     if (def) {
 325         const char *name = prog_getstring(prog, def->name);
 326         if (name[0] == '#')
 327             len += printf("$");
 328         else
 329             len += printf("%s ", name);
 330         vtype = def->type & DEF_TYPEMASK;
 331     }
 332
 333     switch (vtype) {
 334         case TYPE_VOID:
 335         case TYPE_ENTITY:
 336         case TYPE_FIELD:
 337         case TYPE_FUNCTION:
 338         case TYPE_POINTER:
 339             len += printf("(%i),", value->_int);
 340             break;
 341         case TYPE_VECTOR:
 342             len += printf("'%g %g %g',", value->vector[0],
 343                                          value->vector[1],
 344                                          value->vector[2]);
 345             break;
 346         case TYPE_STRING:
 347             if (value->string)
 348                 len += print_escaped_string(prog_getstring(prog, value->string), sizeof(spaces)-len-5);
 349             else
 350                 len += printf("(null)");
 351             len += printf(",");
 352             /* len += printf("\"%s\",", prog_getstring(prog, value->string)); */
 353             break;
 354         case TYPE_FLOAT:
 355         default:
 356             len += printf("%g,", value->_float);
 357             break;
 358     }
 359 done:
 360     if (len < (int)sizeof(spaces)-1) {
 361         spaces[sizeof(spaces)-1-len] = 0;
 362         printf(spaces);
 363         spaces[sizeof(spaces)-1-len] = ' ';
 364     }
 365 }
 366
 367 static void prog_print_statement(qc_program *prog, prog_section_statement *st)
 368 {
 369     if (st->opcode >= (sizeof(asm_instr)/sizeof(asm_instr[0]))) {
 370         printf("<illegal instruction %d>\n", st->opcode);
 371         return;
 372     }
 373     if ((prog->xflags & VMXF_TRACE) && vec_size(prog->function_stack)) {
 374         size_t i;
 375         for (i = 0; i < vec_size(prog->function_stack); ++i)
 376             printf("->");
 377         printf("%s:", vec_last(prog->function_stack));
 378     }
 379     printf(" <> %-12s", asm_instr[st->opcode].m);
 380     if (st->opcode >= INSTR_IF &&
 381         st->opcode <= INSTR_IFNOT)
 382     {
 383         trace_print_global(prog, st->o1.u1, TYPE_FLOAT);
 384         printf("%d\n", st->o2.s1);
 385     }
 386     else if (st->opcode >= INSTR_CALL0 &&
 387              st->opcode <= INSTR_CALL8)
 388     {
 389         trace_print_global(prog, st->o1.u1, TYPE_FUNCTION);
 390         printf("\n");
 391     }
 392     else if (st->opcode == INSTR_GOTO)
 393     {
 394         printf("%i\n", st->o1.s1);
 395     }
 396     else
 397     {
 398         int t[3] = { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT };
 399         switch (st->opcode)
 400         {
 401             case INSTR_MUL_FV:
 402                 t[1] = t[2] = TYPE_VECTOR;
 403                 break;
 404             case INSTR_MUL_VF:
 405                 t[0] = t[2] = TYPE_VECTOR;
 406                 break;
 407             case INSTR_MUL_V:
 408                 t[0] = t[1] = TYPE_VECTOR;
 409                 break;
 410             case INSTR_ADD_V:
 411             case INSTR_SUB_V:
 412             case INSTR_EQ_V:
 413             case INSTR_NE_V:
 414                 t[0] = t[1] = t[2] = TYPE_VECTOR;
 415                 break;
 416             case INSTR_EQ_S:
 417             case INSTR_NE_S:
 418                 t[0] = t[1] = TYPE_STRING;
 419                 break;
 420             case INSTR_STORE_F:
 421             case INSTR_STOREP_F:
 422                 t[2] = -1;
 423                 break;
 424             case INSTR_STORE_V:
 425                 t[0] = t[1] = TYPE_VECTOR; t[2] = -1;
 426                 break;
 427             case INSTR_STORE_S:
 428                 t[0] = t[1] = TYPE_STRING; t[2] = -1;
 429                 break;
 430             case INSTR_STORE_ENT:
 431                 t[0] = t[1] = TYPE_ENTITY; t[2] = -1;
 432                 break;
 433             case INSTR_STORE_FLD:
 434                 t[0] = t[1] = TYPE_FIELD; t[2] = -1;
 435                 break;
 436             case INSTR_STORE_FNC:
 437                 t[0] = t[1] = TYPE_FUNCTION; t[2] = -1;
 438                 break;
 439             case INSTR_STOREP_V:
 440                 t[0] = TYPE_VECTOR; t[1] = TYPE_ENTITY; t[2] = -1;
 441                 break;
 442             case INSTR_STOREP_S:
 443                 t[0] = TYPE_STRING; t[1] = TYPE_ENTITY; t[2] = -1;
 444                 break;
 445             case INSTR_STOREP_ENT:
 446                 t[0] = TYPE_ENTITY; t[1] = TYPE_ENTITY; t[2] = -1;
 447                 break;
 448             case INSTR_STOREP_FLD:
 449                 t[0] = TYPE_FIELD; t[1] = TYPE_ENTITY; t[2] = -1;
 450                 break;
 451             case INSTR_STOREP_FNC:
 452                 t[0] = TYPE_FUNCTION; t[1] = TYPE_ENTITY; t[2] = -1;
 453                 break;
 454         }
 455         if (t[0] >= 0) trace_print_global(prog, st->o1.u1, t[0]);
 456         else           printf("(none),          ");
 457         if (t[1] >= 0) trace_print_global(prog, st->o2.u1, t[1]);
 458         else           printf("(none),          ");
 459         if (t[2] >= 0) trace_print_global(prog, st->o3.u1, t[2]);
 460         else           printf("(none)");
 461         printf("\n");
 462     }
 463     fflush(stdout);
 464 }
 465
 466 static qcint prog_enterfunction(qc_program *prog, prog_section_function *func)
 467 {
 468     qc_exec_stack st;
 469     size_t  parampos;
 470     int32_t p;
 471
 472     /* back up locals */
 473     st.localsp  = vec_size(prog->localstack);
 474     st.stmt     = prog->statement;
 475     st.function = func;
 476
 477     if (prog->xflags & VMXF_TRACE) {
 478         vec_push(prog->function_stack, prog_getstring(prog, func->name));
 479     }
 480
 481 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 482     if (vec_size(prog->stack))
 483     {
 484         prog_section_function *cur;
 485         cur = prog->stack[vec_size(prog->stack)-1].function;
 486         if (cur)
 487         {
 488             qcint *globals = prog->globals + cur->firstlocal;
 489             vec_append(prog->localstack, cur->locals, globals);
 490         }
 491     }
 492 #else
 493     {
 494         qcint *globals = prog->globals + func->firstlocal;
 495         vec_append(prog->localstack, func->locals, globals);
 496     }
 497 #endif
 498
 499     /* copy parameters */
 500     parampos = func->firstlocal;
 501     for (p = 0; p < func->nargs; ++p)
 502     {
 503         size_t s;
 504         for (s = 0; s < func->argsize[p]; ++s) {
 505             prog->globals[parampos] = prog->globals[OFS_PARM0 + 3*p + s];
 506             ++parampos;
 507         }
 508     }
 509
 510     vec_push(prog->stack, st);
 511
 512     return func->entry;
 513 }
 514
 515 static qcint prog_leavefunction(qc_program *prog)
 516 {
 517     prog_section_function *prev = NULL;
 518     size_t oldsp;
 519
 520     qc_exec_stack st = vec_last(prog->stack);
 521
 522     if (prog->xflags & VMXF_TRACE) {
 523         if (vec_size(prog->function_stack))
 524             vec_pop(prog->function_stack);
 525     }
 526
 527 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 528     if (vec_size(prog->stack) > 1) {
 529         prev  = prog->stack[vec_size(prog->stack)-2].function;
 530         oldsp = prog->stack[vec_size(prog->stack)-2].localsp;
 531     }
 532 #else
 533     prev  = prog->stack[vec_size(prog->stack)-1].function;
 534     oldsp = prog->stack[vec_size(prog->stack)-1].localsp;
 535 #endif
 536     if (prev) {
 537         qcint *globals = prog->globals + prev->firstlocal;
 538         memcpy(globals, prog->localstack + oldsp, prev->locals * sizeof(prog->localstack[0]));
 539         /* vec_remove(prog->localstack, oldsp, vec_size(prog->localstack)-oldsp); */
 540         vec_shrinkto(prog->localstack, oldsp);
 541     }
 542
 543     vec_pop(prog->stack);
 544
 545     return st.stmt - 1; /* offset the ++st */
 546 }
 547
 548 bool prog_exec(qc_program *prog, prog_section_function *func, size_t flags, long maxjumps)
 549 {
 550     long jumpcount = 0;
 551     size_t oldxflags = prog->xflags;
 552     prog_section_statement *st;
 553
 554     prog->vmerror = 0;
 555     prog->xflags = flags;
 556
 557     st = prog->code + prog_enterfunction(prog, func);
 558     --st;
 559     switch (flags)
 560     {
 561         default:
 562         case 0:
 563         {
 564 #define QCVM_LOOP    1
 565 #define QCVM_PROFILE 0
 566 #define QCVM_TRACE   0
 567 #           include __FILE__
 568         }
 569         case (VMXF_TRACE):
 570         {
 571 #define QCVM_PROFILE 0
 572 #define QCVM_TRACE   1
 573 #           include __FILE__
 574         }
 575         case (VMXF_PROFILE):
 576         {
 577 #define QCVM_PROFILE 1
 578 #define QCVM_TRACE   0
 579 #           include __FILE__
 580         }
 581         case (VMXF_TRACE|VMXF_PROFILE):
 582         {
 583 #define QCVM_PROFILE 1
 584 #define QCVM_TRACE   1
 585 #           include __FILE__
 586         }
 587     };
 588
 589 cleanup:
 590     prog->xflags = oldxflags;
 591     vec_free(prog->localstack);
 592     vec_free(prog->stack);
 593     if (prog->vmerror)
 594         return false;
 595     return true;
 596 }
 597
 598 /***********************************************************************
 599  * main for when building the standalone executor
 600  */
 601
 602 #if defined(QCVM_EXECUTOR)
 603 #include <math.h>
 604
 605 opts_cmd_t opts;
 606
 607 const char *type_name[TYPE_COUNT] = {
 608     "void",
 609     "string",
 610     "float",
 611     "vector",
 612     "entity",
 613     "field",
 614     "function",
 615     "pointer",
 616 #if 0
 617     "integer",
 618 #endif
 619     "variant"
 620 };
 621
 622 typedef struct {
 623     int         vtype;
 624     const char *value;
 625 } qcvm_parameter;
 626
 627 qcvm_parameter *main_params = NULL;
 628
 629 #define CheckArgs(num) do {                                                    \
 630     if (prog->argc != (num)) {                                                 \
 631         prog->vmerror++;                                                       \
 632         printf("ERROR: invalid number of arguments for %s: %i, expected %i\n", \
 633         __FUNCTION__, prog->argc, (num));                                      \
 634         return -1;                                                             \
 635     }                                                                          \
 636 } while (0)
 637
 638 #define GetGlobal(idx) ((qcany*)(prog->globals + (idx)))
 639 #define GetArg(num) GetGlobal(OFS_PARM0 + 3*(num))
 640 #define Return(any) *(GetGlobal(OFS_RETURN)) = (any)
 641
 642 static int qc_print(qc_program *prog)
 643 {
 644     size_t i;
 645     const char *laststr = NULL;
 646     for (i = 0; i < (size_t)prog->argc; ++i) {
 647         qcany *str = (qcany*)(prog->globals + OFS_PARM0 + 3*i);
 648         laststr = prog_getstring(prog, str->string);
 649         printf("%s", laststr);
 650     }
 651     if (laststr && (prog->xflags & VMXF_TRACE)) {
 652         size_t len = strlen(laststr);
 653         if (!len || laststr[len-1] != '\n')
 654             printf("\n");
 655     }
 656     return 0;
 657 }
 658
 659 static int qc_error(qc_program *prog)
 660 {
 661     printf("*** VM raised an error:\n");
 662     qc_print(prog);
 663     prog->vmerror++;
 664     return -1;
 665 }
 666
 667 static int qc_ftos(qc_program *prog)
 668 {
 669     char buffer[512];
 670     qcany *num;
 671     qcany str;
 672     CheckArgs(1);
 673     num = GetArg(0);
 674     snprintf(buffer, sizeof(buffer), "%g", num->_float);
 675     str.string = prog_tempstring(prog, buffer);
 676     Return(str);
 677     return 0;
 678 }
 679
 680 static int qc_stof(qc_program *prog)
 681 {
 682     qcany *str;
 683     qcany num;
 684     CheckArgs(1);
 685     str = GetArg(0);
 686     num._float = strtof(prog_getstring(prog, str->string), NULL);
 687     Return(num);
 688     return 0;
 689 }
 690
 691 static int qc_vtos(qc_program *prog)
 692 {
 693     char buffer[512];
 694     qcany *num;
 695     qcany str;
 696     CheckArgs(1);
 697     num = GetArg(0);
 698     snprintf(buffer, sizeof(buffer), "'%g %g %g'", num->vector[0], num->vector[1], num->vector[2]);
 699     str.string = prog_tempstring(prog, buffer);
 700     Return(str);
 701     return 0;
 702 }
 703
 704 static int qc_etos(qc_program *prog)
 705 {
 706     char buffer[512];
 707     qcany *num;
 708     qcany str;
 709     CheckArgs(1);
 710     num = GetArg(0);
 711     snprintf(buffer, sizeof(buffer), "%i", num->_int);
 712     str.string = prog_tempstring(prog, buffer);
 713     Return(str);
 714     return 0;
 715 }
 716
 717 static int qc_spawn(qc_program *prog)
 718 {
 719     qcany ent;
 720     CheckArgs(0);
 721     ent.edict = prog_spawn_entity(prog);
 722     Return(ent);
 723     return (ent.edict ? 0 : -1);
 724 }
 725
 726 static int qc_kill(qc_program *prog)
 727 {
 728     qcany *ent;
 729     CheckArgs(1);
 730     ent = GetArg(0);
 731     prog_free_entity(prog, ent->edict);
 732     return 0;
 733 }
 734
 735 static int qc_vlen(qc_program *prog)
 736 {
 737     qcany *vec, len;
 738     CheckArgs(1);
 739     vec = GetArg(0);
 740     len._float = sqrt(vec->vector[0] * vec->vector[0] +
 741                       vec->vector[1] * vec->vector[1] +
 742                       vec->vector[2] * vec->vector[2]);
 743     Return(len);
 744     return 0;
 745 }
 746
 747 static int qc_strcat(qc_program *prog)
 748 {
 749     char  *buffer;
 750     size_t len1,   len2;
 751     char  *cstr1, *cstr2;
 752     qcany *str1,  *str2;
 753     qcany  out;
 754
 755     CheckArgs(2);
 756     str1 = GetArg(0);
 757     str2 = GetArg(1);
 758     cstr1 = prog_getstring(prog, str1->string);
 759     cstr2 = prog_getstring(prog, str2->string);
 760     len1 = strlen(cstr1);
 761     len2 = strlen(cstr2);
 762     buffer = (char*)mem_a(len1 + len2 + 1);
 763     memcpy(buffer, cstr1, len1);
 764     memcpy(buffer+len1, cstr2, len2+1);
 765     out.string = prog_tempstring(prog, buffer);
 766     mem_d(buffer);
 767     Return(out);
 768     return 0;
 769 }
 770
 771 static int qc_strcmp(qc_program *prog)
 772 {
 773     char  *cstr1, *cstr2;
 774     qcany *str1,  *str2;
 775     qcany out;
 776
 777     if (prog->argc != 2 && prog->argc != 3) {
 778         printf("ERROR: invalid number of arguments for strcmp/strncmp: %i, expected 2 or 3\n",
 779                prog->argc);
 780         return -1;
 781     }
 782
 783     str1 = GetArg(0);
 784     str2 = GetArg(1);
 785     cstr1 = prog_getstring(prog, str1->string);
 786     cstr2 = prog_getstring(prog, str2->string);
 787     if (prog->argc == 3)
 788         out._float = strncmp(cstr1, cstr2, GetArg(2)->_float);
 789     else
 790         out._float = strcmp(cstr1, cstr2);
 791     Return(out);
 792     return 0;
 793 }
 794
 795 static prog_builtin qc_builtins[] = {
 796     NULL,
 797     &qc_print,  /*   1   */
 798     &qc_ftos,   /*   2   */
 799     &qc_spawn,  /*   3   */
 800     &qc_kill,   /*   4   */
 801     &qc_vtos,   /*   5   */
 802     &qc_error,  /*   6   */
 803     &qc_vlen,   /*   7   */
 804     &qc_etos,   /*   8   */
 805     &qc_stof,   /*   9   */
 806     &qc_strcat, /*   10  */
 807     &qc_strcmp  /*   11  */
 808 };
 809 static size_t qc_builtins_count = sizeof(qc_builtins) / sizeof(qc_builtins[0]);
 810
 811 static const char *arg0 = NULL;
 812
 813 static void version() {
 814     printf("GMQCC-QCVM %d.%d.%d Built %s %s\n",
 815            GMQCC_VERSION_MAJOR,
 816            GMQCC_VERSION_MINOR,
 817            GMQCC_VERSION_PATCH,
 818            __DATE__,
 819            __TIME__
 820     );
 821 }
 822
 823 static void usage()
 824 {
 825     printf("usage: %s [options] [parameters] file\n", arg0);
 826     printf("options:\n");
 827     printf("  -h, --help         print this message\n"
 828            "  -trace             trace the execution\n"
 829            "  -profile           perform profiling during execution\n"
 830            "  -info              print information from the prog's header\n"
 831            "  -disasm            disassemble and exit\n"
 832            "  -disasm-func func  disassemble and exit\n"
 833            "  -printdefs         list the defs section\n"
 834            "  -printfields       list the field section\n"
 835            "  -printfuns         list functions information\n"
 836            "  -v                 be verbose\n"
 837            "  -vv                be even more verbose\n");
 838     printf("parameters:\n");
 839     printf("  -vector <V>   pass a vector parameter to main()\n"
 840            "  -float  <f>   pass a float parameter to main()\n"
 841            "  -string <s>   pass a string parameter to main() \n");
 842 }
 843
 844 static void prog_main_setparams(qc_program *prog)
 845 {
 846     size_t i;
 847     qcany *arg;
 848
 849     for (i = 0; i < vec_size(main_params); ++i) {
 850         arg = GetGlobal(OFS_PARM0 + 3*i);
 851         arg->vector[0] = 0;
 852         arg->vector[1] = 0;
 853         arg->vector[2] = 0;
 854         switch (main_params[i].vtype) {
 855             case TYPE_VECTOR:
 856 #ifdef _MSC_VER
 857                 (void)sscanf_s(main_params[i].value, " %f %f %f ",
 858                                &arg->vector[0],
 859                                &arg->vector[1],
 860                                &arg->vector[2]);
 861 #else
 862                 (void)sscanf(main_params[i].value, " %f %f %f ",
 863                              &arg->vector[0],
 864                              &arg->vector[1],
 865                              &arg->vector[2]);
 866 #endif
 867                 break;
 868             case TYPE_FLOAT:
 869                 arg->_float = atof(main_params[i].value);
 870                 break;
 871             case TYPE_STRING:
 872                 arg->string = prog_tempstring(prog, main_params[i].value);
 873                 break;
 874             default:
 875                 printf("error: unhandled parameter type: %i\n", main_params[i].vtype);
 876                 break;
 877         }
 878     }
 879 }
 880
 881 void prog_disasm_function(qc_program *prog, size_t id);
 882 int main(int argc, char **argv)
 883 {
 884     size_t      i;
 885     qcint       fnmain = -1;
 886     qc_program *prog;
 887     size_t      xflags = VMXF_DEFAULT;
 888     bool        opts_printfields = false;
 889     bool        opts_printdefs   = false;
 890     bool        opts_printfuns   = false;
 891     bool        opts_disasm      = false;
 892     bool        opts_info        = false;
 893     bool        noexec           = false;
 894     const char *progsfile        = NULL;
 895     const char **dis_list        = NULL;
 896     int         opts_v           = 0;
 897
 898     arg0 = argv[0];
 899
 900     if (argc < 2) {
 901         usage();
 902         exit(1);
 903     }
 904
 905     while (argc > 1) {
 906         if (!strcmp(argv[1], "-h") ||
 907             !strcmp(argv[1], "-help") ||
 908             !strcmp(argv[1], "--help"))
 909         {
 910             usage();
 911             exit(0);
 912         }
 913         else if (!strcmp(argv[1], "-v")) {
 914             ++opts_v;
 915             --argc;
 916             ++argv;
 917         }
 918         else if (!strncmp(argv[1], "-vv", 3)) {
 919             const char *av = argv[1]+1;
 920             for (; *av; ++av) {
 921                 if (*av == 'v')
 922                     ++opts_v;
 923                 else {
 924                     usage();
 925                     exit(1);
 926                 }
 927             }
 928             --argc;
 929             ++argv;
 930         }
 931         else if (!strcmp(argv[1], "-version") ||
 932                  !strcmp(argv[1], "--version"))
 933         {
 934             version();
 935             exit(0);
 936         }
 937         else if (!strcmp(argv[1], "-trace")) {
 938             --argc;
 939             ++argv;
 940             xflags |= VMXF_TRACE;
 941         }
 942         else if (!strcmp(argv[1], "-profile")) {
 943             --argc;
 944             ++argv;
 945             xflags |= VMXF_PROFILE;
 946         }
 947         else if (!strcmp(argv[1], "-info")) {
 948             --argc;
 949             ++argv;
 950             opts_info = true;
 951             noexec = true;
 952         }
 953         else if (!strcmp(argv[1], "-disasm")) {
 954             --argc;
 955             ++argv;
 956             opts_disasm = true;
 957             noexec = true;
 958         }
 959         else if (!strcmp(argv[1], "-disasm-func")) {
 960             --argc;
 961             ++argv;
 962             if (argc <= 1) {
 963                 usage();
 964                 exit(1);
 965             }
 966             vec_push(dis_list, argv[1]);
 967             --argc;
 968             ++argv;
 969             noexec = true;
 970         }
 971         else if (!strcmp(argv[1], "-printdefs")) {
 972             --argc;
 973             ++argv;
 974             opts_printdefs = true;
 975             noexec = true;
 976         }
 977         else if (!strcmp(argv[1], "-printfuns")) {
 978             --argc;
 979             ++argv;
 980             opts_printfuns = true;
 981             noexec = true;
 982         }
 983         else if (!strcmp(argv[1], "-printfields")) {
 984             --argc;
 985             ++argv;
 986             opts_printfields = true;
 987             noexec = true;
 988         }
 989         else if (!strcmp(argv[1], "-vector") ||
 990                  !strcmp(argv[1], "-string") ||
 991                  !strcmp(argv[1], "-float") )
 992         {
 993             qcvm_parameter p;
 994             if (argv[1][1] == 'f')
 995                 p.vtype = TYPE_FLOAT;
 996             else if (argv[1][1] == 's')
 997                 p.vtype = TYPE_STRING;
 998             else if (argv[1][1] == 'v')
 999                 p.vtype = TYPE_VECTOR;
1000
1001             --argc;
1002             ++argv;
1003             if (argc < 3) {
1004                 usage();
1005                 exit(1);
1006             }
1007             p.value = argv[1];
1008
1009             vec_push(main_params, p);
1010             --argc;
1011             ++argv;
1012         }
1013         else if (!strcmp(argv[1], "--")) {
1014             --argc;
1015             ++argv;
1016             break;
1017         }
1018         else if (argv[1][0] != '-') {
1019             if (progsfile) {
1020                 printf("only 1 program file may be specified\n");
1021                 usage();
1022                 exit(1);
1023             }
1024             progsfile = argv[1];
1025             --argc;
1026             ++argv;
1027         }
1028         else
1029         {
1030             usage();
1031             exit(1);
1032         }
1033     }
1034
1035     if (argc > 2) {
1036         usage();
1037         exit(1);
1038     }
1039     if (argc > 1) {
1040         if (progsfile) {
1041             printf("only 1 program file may be specified\n");
1042             usage();
1043             exit(1);
1044         }
1045         progsfile = argv[1];
1046         --argc;
1047         ++argv;
1048     }
1049
1050     if (!progsfile) {
1051         usage();
1052         exit(1);
1053     }
1054
1055     prog = prog_load(progsfile);
1056     if (!prog) {
1057         printf("failed to load program '%s'\n", progsfile);
1058         exit(1);
1059     }
1060
1061     prog->builtins       = qc_builtins;
1062     prog->builtins_count = qc_builtins_count;
1063
1064     if (opts_info) {
1065         printf("Program's system-checksum = 0x%04x\n", (unsigned int)prog->crc16);
1066         printf("Entity field space: %u\n", (unsigned int)prog->entityfields);
1067         printf("Globals: %u\n", (unsigned int)vec_size(prog->globals));
1068         printf("Counts:\n"
1069                "      code: %lu\n"
1070                "      defs: %lu\n"
1071                "    fields: %lu\n"
1072                " functions: %lu\n"
1073                "   strings: %lu\n",
1074                (unsigned long)vec_size(prog->code),
1075                (unsigned long)vec_size(prog->defs),
1076                (unsigned long)vec_size(prog->fields),
1077                (unsigned long)vec_size(prog->functions),
1078                (unsigned long)vec_size(prog->strings));
1079     }
1080
1081     if (opts_info) {
1082         prog_delete(prog);
1083         return 0;
1084     }
1085     for (i = 0; i < vec_size(dis_list); ++i) {
1086         size_t k;
1087         printf("Looking for `%s`\n", dis_list[i]);
1088         for (k = 1; k < vec_size(prog->functions); ++k) {
1089             const char *name = prog_getstring(prog, prog->functions[k].name);
1090             if (!strcmp(name, dis_list[i])) {
1091                 prog_disasm_function(prog, k);
1092                 break;
1093             }
1094         }
1095     }
1096     if (opts_disasm) {
1097         for (i = 1; i < vec_size(prog->functions); ++i)
1098             prog_disasm_function(prog, i);
1099         return 0;
1100     }
1101     if (opts_printdefs) {
1102         for (i = 0; i < vec_size(prog->defs); ++i) {
1103             printf("Global: %8s %-16s at %u%s\n",
1104                    type_name[prog->defs[i].type & DEF_TYPEMASK],
1105                    prog_getstring(prog, prog->defs[i].name),
1106                    (unsigned int)prog->defs[i].offset,
1107                    ((prog->defs[i].type & DEF_SAVEGLOBAL) ? " [SAVE]" : ""));
1108         }
1109     }
1110     if (opts_printfields) {
1111         for (i = 0; i < vec_size(prog->fields); ++i) {
1112             printf("Field: %8s %-16s at %u%s\n",
1113                    type_name[prog->fields[i].type],
1114                    prog_getstring(prog, prog->fields[i].name),
1115                    (unsigned int)prog->fields[i].offset,
1116                    ((prog->fields[i].type & DEF_SAVEGLOBAL) ? " [SAVE]" : ""));
1117         }
1118     }
1119     if (opts_printfuns) {
1120         for (i = 0; i < vec_size(prog->functions); ++i) {
1121             int32_t a;
1122             printf("Function: %-16s taking %i parameters:(",
1123                    prog_getstring(prog, prog->functions[i].name),
1124                    (unsigned int)prog->functions[i].nargs);
1125             for (a = 0; a < prog->functions[i].nargs; ++a) {
1126                 printf(" %i", prog->functions[i].argsize[a]);
1127             }
1128             if (opts_v > 1) {
1129                 int32_t start = prog->functions[i].entry;
1130                 if (start < 0)
1131                     printf(") builtin %i\n", (int)-start);
1132                 else {
1133                     size_t funsize = 0;
1134                     prog_section_statement *st = prog->code + start;
1135                     for (;st->opcode != INSTR_DONE; ++st)
1136                         ++funsize;
1137                     printf(") - %lu instructions", (unsigned long)funsize);
1138                     if (opts_v > 2) {
1139                         printf(" - locals: %i + %i\n",
1140                                prog->functions[i].firstlocal,
1141                                prog->functions[i].locals);
1142                     }
1143                     else
1144                         printf("\n");
1145                 }
1146             }
1147             else if (opts_v) {
1148                 printf(") locals: %i + %i\n",
1149                        prog->functions[i].firstlocal,
1150                        prog->functions[i].locals);
1151             }
1152             else
1153                 printf(")\n");
1154         }
1155     }
1156     if (!noexec) {
1157         for (i = 1; i < vec_size(prog->functions); ++i) {
1158             const char *name = prog_getstring(prog, prog->functions[i].name);
1159             if (!strcmp(name, "main"))
1160                 fnmain = (qcint)i;
1161         }
1162         if (fnmain > 0)
1163         {
1164             prog_main_setparams(prog);
1165             prog_exec(prog, &prog->functions[fnmain], xflags, VM_JUMPS_DEFAULT);
1166         }
1167         else
1168             printf("No main function found\n");
1169     }
1170
1171     prog_delete(prog);
1172     return 0;
1173 }
1174
1175 void prog_disasm_function(qc_program *prog, size_t id)
1176 {
1177     prog_section_function *fdef = prog->functions + id;
1178     prog_section_statement *st;
1179
1180     if (fdef->entry < 0) {
1181         printf("FUNCTION \"%s\" = builtin #%i\n", prog_getstring(prog, fdef->name), (int)-fdef->entry);
1182         return;
1183     }
1184     else
1185         printf("FUNCTION \"%s\"\n", prog_getstring(prog, fdef->name));
1186
1187     st = prog->code + fdef->entry;
1188     while (st->opcode != INSTR_DONE) {
1189         prog_print_statement(prog, st);
1190         ++st;
1191     }
1192 }
1193 #endif
1194 #else /* !QCVM_LOOP */
1195 /*
1196  * Everything from here on is not including into the compilation of the
1197  * executor.  This is simply code that is #included via #include __FILE__
1198  * see when QCVM_LOOP is defined, the rest of the code above do not get
1199  * re-included.  So this really just acts like one large macro, but it
1200  * sort of isn't, which makes it nicer looking.
1201  */
1202
1203 #define OPA ( (qcany*) (prog->globals + st->o1.u1) )
1204 #define OPB ( (qcany*) (prog->globals + st->o2.u1) )
1205 #define OPC ( (qcany*) (prog->globals + st->o3.u1) )
1206
1207 #define GLOBAL(x) ( (qcany*) (prog->globals + (x)) )
1208
1209 /* to be consistent with current darkplaces behaviour */
1210 #if !defined(FLOAT_IS_TRUE_FOR_INT)
1211 #   define FLOAT_IS_TRUE_FOR_INT(x) ( (x) & 0x7FFFFFFF )
1212 #endif
1213
1214 while (1) {
1215     prog_section_function  *newf;
1216     qcany          *ed;
1217     qcany          *ptr;
1218
1219     ++st;
1220
1221 #if QCVM_PROFILE
1222     prog->profile[st - prog->code]++;
1223 #endif
1224
1225 #if QCVM_TRACE
1226     prog_print_statement(prog, st);
1227 #endif
1228
1229     switch (st->opcode)
1230     {
1231         default:
1232             qcvmerror(prog, "Illegal instruction in %s\n", prog->filename);
1233             goto cleanup;
1234
1235         case INSTR_DONE:
1236         case INSTR_RETURN:
1237             /* TODO: add instruction count to function profile count */
1238             GLOBAL(OFS_RETURN)->ivector[0] = OPA->ivector[0];
1239             GLOBAL(OFS_RETURN)->ivector[1] = OPA->ivector[1];
1240             GLOBAL(OFS_RETURN)->ivector[2] = OPA->ivector[2];
1241
1242             st = prog->code + prog_leavefunction(prog);
1243             if (!vec_size(prog->stack))
1244                 goto cleanup;
1245
1246             break;
1247
1248         case INSTR_MUL_F:
1249             OPC->_float = OPA->_float * OPB->_float;
1250             break;
1251         case INSTR_MUL_V:
1252             OPC->_float = OPA->vector[0]*OPB->vector[0] +
1253                           OPA->vector[1]*OPB->vector[1] +
1254                           OPA->vector[2]*OPB->vector[2];
1255             break;
1256         case INSTR_MUL_FV:
1257             OPC->vector[0] = OPA->_float * OPB->vector[0];
1258             OPC->vector[1] = OPA->_float * OPB->vector[1];
1259             OPC->vector[2] = OPA->_float * OPB->vector[2];
1260             break;
1261         case INSTR_MUL_VF:
1262             OPC->vector[0] = OPB->_float * OPA->vector[0];
1263             OPC->vector[1] = OPB->_float * OPA->vector[1];
1264             OPC->vector[2] = OPB->_float * OPA->vector[2];
1265             break;
1266         case INSTR_DIV_F:
1267             if (OPB->_float != 0.0f)
1268                 OPC->_float = OPA->_float / OPB->_float;
1269             else
1270                 OPC->_float = 0;
1271             break;
1272
1273         case INSTR_ADD_F:
1274             OPC->_float = OPA->_float + OPB->_float;
1275             break;
1276         case INSTR_ADD_V:
1277             OPC->vector[0] = OPA->vector[0] + OPB->vector[0];
1278             OPC->vector[1] = OPA->vector[1] + OPB->vector[1];
1279             OPC->vector[2] = OPA->vector[2] + OPB->vector[2];
1280             break;
1281         case INSTR_SUB_F:
1282             OPC->_float = OPA->_float - OPB->_float;
1283             break;
1284         case INSTR_SUB_V:
1285             OPC->vector[0] = OPA->vector[0] - OPB->vector[0];
1286             OPC->vector[1] = OPA->vector[1] - OPB->vector[1];
1287             OPC->vector[2] = OPA->vector[2] - OPB->vector[2];
1288             break;
1289
1290         case INSTR_EQ_F:
1291             OPC->_float = (OPA->_float == OPB->_float);
1292             break;
1293         case INSTR_EQ_V:
1294             OPC->_float = ((OPA->vector[0] == OPB->vector[0]) &&
1295                            (OPA->vector[1] == OPB->vector[1]) &&
1296                            (OPA->vector[2] == OPB->vector[2]) );
1297             break;
1298         case INSTR_EQ_S:
1299             OPC->_float = !strcmp(prog_getstring(prog, OPA->string),
1300                                   prog_getstring(prog, OPB->string));
1301             break;
1302         case INSTR_EQ_E:
1303             OPC->_float = (OPA->_int == OPB->_int);
1304             break;
1305         case INSTR_EQ_FNC:
1306             OPC->_float = (OPA->function == OPB->function);
1307             break;
1308         case INSTR_NE_F:
1309             OPC->_float = (OPA->_float != OPB->_float);
1310             break;
1311         case INSTR_NE_V:
1312             OPC->_float = ((OPA->vector[0] != OPB->vector[0]) ||
1313                            (OPA->vector[1] != OPB->vector[1]) ||
1314                            (OPA->vector[2] != OPB->vector[2]) );
1315             break;
1316         case INSTR_NE_S:
1317             OPC->_float = !!strcmp(prog_getstring(prog, OPA->string),
1318                                    prog_getstring(prog, OPB->string));
1319             break;
1320         case INSTR_NE_E:
1321             OPC->_float = (OPA->_int != OPB->_int);
1322             break;
1323         case INSTR_NE_FNC:
1324             OPC->_float = (OPA->function != OPB->function);
1325             break;
1326
1327         case INSTR_LE:
1328             OPC->_float = (OPA->_float <= OPB->_float);
1329             break;
1330         case INSTR_GE:
1331             OPC->_float = (OPA->_float >= OPB->_float);
1332             break;
1333         case INSTR_LT:
1334             OPC->_float = (OPA->_float < OPB->_float);
1335             break;
1336         case INSTR_GT:
1337             OPC->_float = (OPA->_float > OPB->_float);
1338             break;
1339
1340         case INSTR_LOAD_F:
1341         case INSTR_LOAD_S:
1342         case INSTR_LOAD_FLD:
1343         case INSTR_LOAD_ENT:
1344         case INSTR_LOAD_FNC:
1345             if (OPA->edict < 0 || OPA->edict >= prog->entities) {
1346                 qcvmerror(prog, "progs `%s` attempted to read an out of bounds entity", prog->filename);
1347                 goto cleanup;
1348             }
1349             if ((unsigned int)(OPB->_int) >= (unsigned int)(prog->entityfields)) {
1350                 qcvmerror(prog, "prog `%s` attempted to read an invalid field from entity (%i)",
1351                           prog->filename,
1352                           OPB->_int);
1353                 goto cleanup;
1354             }
1355             ed = prog_getedict(prog, OPA->edict);
1356             OPC->_int = ((qcany*)( ((qcint*)ed) + OPB->_int ))->_int;
1357             break;
1358         case INSTR_LOAD_V:
1359             if (OPA->edict < 0 || OPA->edict >= prog->entities) {
1360                 qcvmerror(prog, "progs `%s` attempted to read an out of bounds entity", prog->filename);
1361                 goto cleanup;
1362             }
1363             if (OPB->_int < 0 || OPB->_int + 3 > (qcint)prog->entityfields)
1364             {
1365                 qcvmerror(prog, "prog `%s` attempted to read an invalid field from entity (%i)",
1366                           prog->filename,
1367                           OPB->_int + 2);
1368                 goto cleanup;
1369             }
1370             ed = prog_getedict(prog, OPA->edict);
1371             OPC->ivector[0] = ((qcany*)( ((qcint*)ed) + OPB->_int ))->ivector[0];
1372             OPC->ivector[1] = ((qcany*)( ((qcint*)ed) + OPB->_int ))->ivector[1];
1373             OPC->ivector[2] = ((qcany*)( ((qcint*)ed) + OPB->_int ))->ivector[2];
1374             break;
1375
1376         case INSTR_ADDRESS:
1377             if (OPA->edict < 0 || OPA->edict >= prog->entities) {
1378                 qcvmerror(prog, "prog `%s` attempted to address an out of bounds entity %i", prog->filename, OPA->edict);
1379                 goto cleanup;
1380             }
1381             if ((unsigned int)(OPB->_int) >= (unsigned int)(prog->entityfields))
1382             {
1383                 qcvmerror(prog, "prog `%s` attempted to read an invalid field from entity (%i)",
1384                           prog->filename,
1385                           OPB->_int);
1386                 goto cleanup;
1387             }
1388
1389             ed = prog_getedict(prog, OPA->edict);
1390             OPC->_int = ((qcint*)ed) - prog->entitydata + OPB->_int;
1391             break;
1392
1393         case INSTR_STORE_F:
1394         case INSTR_STORE_S:
1395         case INSTR_STORE_ENT:
1396         case INSTR_STORE_FLD:
1397         case INSTR_STORE_FNC:
1398             OPB->_int = OPA->_int;
1399             break;
1400         case INSTR_STORE_V:
1401             OPB->ivector[0] = OPA->ivector[0];
1402             OPB->ivector[1] = OPA->ivector[1];
1403             OPB->ivector[2] = OPA->ivector[2];
1404             break;
1405
1406         case INSTR_STOREP_F:
1407         case INSTR_STOREP_S:
1408         case INSTR_STOREP_ENT:
1409         case INSTR_STOREP_FLD:
1410         case INSTR_STOREP_FNC:
1411             if (OPB->_int < 0 || OPB->_int >= (qcint)vec_size(prog->entitydata)) {
1412                 qcvmerror(prog, "`%s` attempted to write to an out of bounds edict (%i)", prog->filename, OPB->_int);
1413                 goto cleanup;
1414             }
1415             if (OPB->_int < (qcint)prog->entityfields && !prog->allowworldwrites)
1416                 qcvmerror(prog, "`%s` tried to assign to world.%s (field %i)\n",
1417                           prog->filename,
1418                           prog_getstring(prog, prog_entfield(prog, OPB->_int)->name),
1419                           OPB->_int);
1420             ptr = (qcany*)(prog->entitydata + OPB->_int);
1421             ptr->_int = OPA->_int;
1422             break;
1423         case INSTR_STOREP_V:
1424             if (OPB->_int < 0 || OPB->_int + 2 >= (qcint)vec_size(prog->entitydata)) {
1425                 qcvmerror(prog, "`%s` attempted to write to an out of bounds edict (%i)", prog->filename, OPB->_int);
1426                 goto cleanup;
1427             }
1428             if (OPB->_int < (qcint)prog->entityfields && !prog->allowworldwrites)
1429                 qcvmerror(prog, "`%s` tried to assign to world.%s (field %i)\n",
1430                           prog->filename,
1431                           prog_getstring(prog, prog_entfield(prog, OPB->_int)->name),
1432                           OPB->_int);
1433             ptr = (qcany*)(prog->entitydata + OPB->_int);
1434             ptr->ivector[0] = OPA->ivector[0];
1435             ptr->ivector[1] = OPA->ivector[1];
1436             ptr->ivector[2] = OPA->ivector[2];
1437             break;
1438
1439         case INSTR_NOT_F:
1440             OPC->_float = !FLOAT_IS_TRUE_FOR_INT(OPA->_int);
1441             break;
1442         case INSTR_NOT_V:
1443             OPC->_float = !OPA->vector[0] &&
1444                           !OPA->vector[1] &&
1445                           !OPA->vector[2];
1446             break;
1447         case INSTR_NOT_S:
1448             OPC->_float = !OPA->string ||
1449                           !*prog_getstring(prog, OPA->string);
1450             break;
1451         case INSTR_NOT_ENT:
1452             OPC->_float = (OPA->edict == 0);
1453             break;
1454         case INSTR_NOT_FNC:
1455             OPC->_float = !OPA->function;
1456             break;
1457
1458         case INSTR_IF:
1459             /* this is consistent with darkplaces' behaviour */
1460             if(FLOAT_IS_TRUE_FOR_INT(OPA->_int))
1461             {
1462                 st += st->o2.s1 - 1;    /* offset the s++ */
1463                 if (++jumpcount >= maxjumps)
1464                     qcvmerror(prog, "`%s` hit the runaway loop counter limit of %li jumps", prog->filename, jumpcount);
1465             }
1466             break;
1467         case INSTR_IFNOT:
1468             if(!FLOAT_IS_TRUE_FOR_INT(OPA->_int))
1469             {
1470                 st += st->o2.s1 - 1;    /* offset the s++ */
1471                 if (++jumpcount >= maxjumps)
1472                     qcvmerror(prog, "`%s` hit the runaway loop counter limit of %li jumps", prog->filename, jumpcount);
1473             }
1474             break;
1475
1476         case INSTR_CALL0:
1477         case INSTR_CALL1:
1478         case INSTR_CALL2:
1479         case INSTR_CALL3:
1480         case INSTR_CALL4:
1481         case INSTR_CALL5:
1482         case INSTR_CALL6:
1483         case INSTR_CALL7:
1484         case INSTR_CALL8:
1485             prog->argc = st->opcode - INSTR_CALL0;
1486             if (!OPA->function)
1487                 qcvmerror(prog, "NULL function in `%s`", prog->filename);
1488
1489             if(!OPA->function || OPA->function >= (qcint)vec_size(prog->functions))
1490             {
1491                 qcvmerror(prog, "CALL outside the program in `%s`", prog->filename);
1492                 goto cleanup;
1493             }
1494
1495             newf = &prog->functions[OPA->function];
1496             newf->profile++;
1497
1498             prog->statement = (st - prog->code) + 1;
1499
1500             if (newf->entry < 0)
1501             {
1502                 /* negative statements are built in functions */
1503                 qcint builtinnumber = -newf->entry;
1504                 if (builtinnumber < (qcint)prog->builtins_count && prog->builtins[builtinnumber])
1505                     prog->builtins[builtinnumber](prog);
1506                 else
1507                     qcvmerror(prog, "No such builtin #%i in %s! Try updating your gmqcc sources",
1508                               builtinnumber, prog->filename);
1509             }
1510             else
1511                 st = prog->code + prog_enterfunction(prog, newf) - 1; /* offset st++ */
1512             if (prog->vmerror)
1513                 goto cleanup;
1514             break;
1515
1516         case INSTR_STATE:
1517             qcvmerror(prog, "`%s` tried to execute a STATE operation", prog->filename);
1518             break;
1519
1520         case INSTR_GOTO:
1521             st += st->o1.s1 - 1;    /* offset the s++ */
1522             if (++jumpcount == 10000000)
1523                 qcvmerror(prog, "`%s` hit the runaway loop counter limit of %li jumps", prog->filename, jumpcount);
1524             break;
1525
1526         case INSTR_AND:
1527             OPC->_float = FLOAT_IS_TRUE_FOR_INT(OPA->_int) &&
1528                           FLOAT_IS_TRUE_FOR_INT(OPB->_int);
1529             break;
1530         case INSTR_OR:
1531             OPC->_float = FLOAT_IS_TRUE_FOR_INT(OPA->_int) ||
1532                           FLOAT_IS_TRUE_FOR_INT(OPB->_int);
1533             break;
1534
1535         case INSTR_BITAND:
1536             OPC->_float = ((int)OPA->_float) & ((int)OPB->_float);
1537             break;
1538         case INSTR_BITOR:
1539             OPC->_float = ((int)OPA->_float) | ((int)OPB->_float);
1540             break;
1541     }
1542 }
1543
1544 #undef QCVM_PROFILE
1545 #undef QCVM_TRACE
1546 #endif /* !QCVM_LOOP */