exec.c

   1 /*
   2  * Copyright (C) 2012, 2013
   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         file_puts(stdout, 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         const char *str = prog_getstring(prog, func->name);
 479         vec_push(prog->function_stack, str);
 480     }
 481
 482 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 483     if (vec_size(prog->stack))
 484     {
 485         prog_section_function *cur;
 486         cur = prog->stack[vec_size(prog->stack)-1].function;
 487         if (cur)
 488         {
 489             qcint *globals = prog->globals + cur->firstlocal;
 490             vec_append(prog->localstack, cur->locals, globals);
 491         }
 492     }
 493 #else
 494     {
 495         qcint *globals = prog->globals + func->firstlocal;
 496         vec_append(prog->localstack, func->locals, globals);
 497     }
 498 #endif
 499
 500     /* copy parameters */
 501     parampos = func->firstlocal;
 502     for (p = 0; p < func->nargs; ++p)
 503     {
 504         size_t s;
 505         for (s = 0; s < func->argsize[p]; ++s) {
 506             prog->globals[parampos] = prog->globals[OFS_PARM0 + 3*p + s];
 507             ++parampos;
 508         }
 509     }
 510
 511     vec_push(prog->stack, st);
 512
 513     return func->entry;
 514 }
 515
 516 static qcint prog_leavefunction(qc_program *prog)
 517 {
 518     prog_section_function *prev = NULL;
 519     size_t oldsp;
 520
 521     qc_exec_stack st = vec_last(prog->stack);
 522
 523     if (prog->xflags & VMXF_TRACE) {
 524         if (vec_size(prog->function_stack))
 525             vec_pop(prog->function_stack);
 526     }
 527
 528 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 529     if (vec_size(prog->stack) > 1) {
 530         prev  = prog->stack[vec_size(prog->stack)-2].function;
 531         oldsp = prog->stack[vec_size(prog->stack)-2].localsp;
 532     }
 533 #else
 534     prev  = prog->stack[vec_size(prog->stack)-1].function;
 535     oldsp = prog->stack[vec_size(prog->stack)-1].localsp;
 536 #endif
 537     if (prev) {
 538         qcint *globals = prog->globals + prev->firstlocal;
 539         memcpy(globals, prog->localstack + oldsp, prev->locals * sizeof(prog->localstack[0]));
 540         /* vec_remove(prog->localstack, oldsp, vec_size(prog->localstack)-oldsp); */
 541         vec_shrinkto(prog->localstack, oldsp);
 542     }
 543
 544     vec_pop(prog->stack);
 545
 546     return st.stmt - 1; /* offset the ++st */
 547 }
 548
 549 bool prog_exec(qc_program *prog, prog_section_function *func, size_t flags, long maxjumps)
 550 {
 551     long jumpcount = 0;
 552     size_t oldxflags = prog->xflags;
 553     prog_section_statement *st;
 554
 555     prog->vmerror = 0;
 556     prog->xflags = flags;
 557
 558     st = prog->code + prog_enterfunction(prog, func);
 559     --st;
 560     switch (flags)
 561     {
 562         default:
 563         case 0:
 564         {
 565 #define QCVM_LOOP    1
 566 #define QCVM_PROFILE 0
 567 #define QCVM_TRACE   0
 568 #           include __FILE__
 569         }
 570         case (VMXF_TRACE):
 571         {
 572 #define QCVM_PROFILE 0
 573 #define QCVM_TRACE   1
 574 #           include __FILE__
 575         }
 576         case (VMXF_PROFILE):
 577         {
 578 #define QCVM_PROFILE 1
 579 #define QCVM_TRACE   0
 580 #           include __FILE__
 581         }
 582         case (VMXF_TRACE|VMXF_PROFILE):
 583         {
 584 #define QCVM_PROFILE 1
 585 #define QCVM_TRACE   1
 586 #           include __FILE__
 587         }
 588     };
 589
 590 cleanup:
 591     prog->xflags = oldxflags;
 592     vec_free(prog->localstack);
 593     vec_free(prog->stack);
 594     if (prog->vmerror)
 595         return false;
 596     return true;
 597 }
 598
 599 /***********************************************************************
 600  * main for when building the standalone executor
 601  */
 602
 603 #if defined(QCVM_EXECUTOR)
 604 #include <math.h>
 605
 606 opts_cmd_t opts;
 607
 608 const char *type_name[TYPE_COUNT] = {
 609     "void",
 610     "string",
 611     "float",
 612     "vector",
 613     "entity",
 614     "field",
 615     "function",
 616     "pointer",
 617 #if 0
 618     "integer",
 619 #endif
 620     "variant"
 621 };
 622
 623 typedef struct {
 624     int         vtype;
 625     const char *value;
 626 } qcvm_parameter;
 627
 628 qcvm_parameter *main_params = NULL;
 629
 630 #define CheckArgs(num) do {                                                    \
 631     if (prog->argc != (num)) {                                                 \
 632         prog->vmerror++;                                                       \
 633         printf("ERROR: invalid number of arguments for %s: %i, expected %i\n", \
 634         __FUNCTION__, prog->argc, (num));                                      \
 635         return -1;                                                             \
 636     }                                                                          \
 637 } while (0)
 638
 639 #define GetGlobal(idx) ((qcany*)(prog->globals + (idx)))
 640 #define GetArg(num) GetGlobal(OFS_PARM0 + 3*(num))
 641 #define Return(any) *(GetGlobal(OFS_RETURN)) = (any)
 642
 643 static int qc_print(qc_program *prog)
 644 {
 645     size_t i;
 646     const char *laststr = NULL;
 647     for (i = 0; i < (size_t)prog->argc; ++i) {
 648         qcany *str = (qcany*)(prog->globals + OFS_PARM0 + 3*i);
 649         laststr = prog_getstring(prog, str->string);
 650         printf("%s", laststr);
 651     }
 652     if (laststr && (prog->xflags & VMXF_TRACE)) {
 653         size_t len = strlen(laststr);
 654         if (!len || laststr[len-1] != '\n')
 655             printf("\n");
 656     }
 657     return 0;
 658 }
 659
 660 static int qc_error(qc_program *prog)
 661 {
 662     printf("*** VM raised an error:\n");
 663     qc_print(prog);
 664     prog->vmerror++;
 665     return -1;
 666 }
 667
 668 static int qc_ftos(qc_program *prog)
 669 {
 670     char buffer[512];
 671     qcany *num;
 672     qcany str;
 673     CheckArgs(1);
 674     num = GetArg(0);
 675     snprintf(buffer, sizeof(buffer), "%g", num->_float);
 676     str.string = prog_tempstring(prog, buffer);
 677     Return(str);
 678     return 0;
 679 }
 680
 681 static int qc_stof(qc_program *prog)
 682 {
 683     qcany *str;
 684     qcany num;
 685     CheckArgs(1);
 686     str = GetArg(0);
 687     num._float = strtof(prog_getstring(prog, str->string), NULL);
 688     Return(num);
 689     return 0;
 690 }
 691
 692 static int qc_vtos(qc_program *prog)
 693 {
 694     char buffer[512];
 695     qcany *num;
 696     qcany str;
 697     CheckArgs(1);
 698     num = GetArg(0);
 699     snprintf(buffer, sizeof(buffer), "'%g %g %g'", num->vector[0], num->vector[1], num->vector[2]);
 700     str.string = prog_tempstring(prog, buffer);
 701     Return(str);
 702     return 0;
 703 }
 704
 705 static int qc_etos(qc_program *prog)
 706 {
 707     char buffer[512];
 708     qcany *num;
 709     qcany str;
 710     CheckArgs(1);
 711     num = GetArg(0);
 712     snprintf(buffer, sizeof(buffer), "%i", num->_int);
 713     str.string = prog_tempstring(prog, buffer);
 714     Return(str);
 715     return 0;
 716 }
 717
 718 static int qc_spawn(qc_program *prog)
 719 {
 720     qcany ent;
 721     CheckArgs(0);
 722     ent.edict = prog_spawn_entity(prog);
 723     Return(ent);
 724     return (ent.edict ? 0 : -1);
 725 }
 726
 727 static int qc_kill(qc_program *prog)
 728 {
 729     qcany *ent;
 730     CheckArgs(1);
 731     ent = GetArg(0);
 732     prog_free_entity(prog, ent->edict);
 733     return 0;
 734 }
 735
 736 static int qc_sqrt(qc_program *prog)
 737 {
 738     qcany *num, out;
 739     CheckArgs(1);
 740     num = GetArg(0);
 741     out._float = sqrt(num->_float);
 742     Return(out);
 743     return 0;
 744 }
 745
 746 static int qc_vlen(qc_program *prog)
 747 {
 748     qcany *vec, len;
 749     CheckArgs(1);
 750     vec = GetArg(0);
 751     len._float = sqrt(vec->vector[0] * vec->vector[0] +
 752                       vec->vector[1] * vec->vector[1] +
 753                       vec->vector[2] * vec->vector[2]);
 754     Return(len);
 755     return 0;
 756 }
 757
 758 static int qc_normalize(qc_program *prog)
 759 {
 760     double len;
 761     qcany *vec;
 762     qcany out;
 763     CheckArgs(1);
 764     vec = GetArg(0);
 765     len = sqrt(vec->vector[0] * vec->vector[0] +
 766                vec->vector[1] * vec->vector[1] +
 767                vec->vector[2] * vec->vector[2]);
 768     if (len)
 769         len = 1.0 / len;
 770     else
 771         len = 0;
 772     out.vector[0] = len * vec->vector[0];
 773     out.vector[1] = len * vec->vector[1];
 774     out.vector[2] = len * vec->vector[2];
 775     Return(out);
 776     return 0;
 777 }
 778
 779 static int qc_strcat(qc_program *prog)
 780 {
 781     char  *buffer;
 782     size_t len1,   len2;
 783     char  *cstr1, *cstr2;
 784     qcany *str1,  *str2;
 785     qcany  out;
 786
 787     CheckArgs(2);
 788     str1 = GetArg(0);
 789     str2 = GetArg(1);
 790     cstr1 = prog_getstring(prog, str1->string);
 791     cstr2 = prog_getstring(prog, str2->string);
 792     len1 = strlen(cstr1);
 793     len2 = strlen(cstr2);
 794     buffer = (char*)mem_a(len1 + len2 + 1);
 795     memcpy(buffer, cstr1, len1);
 796     memcpy(buffer+len1, cstr2, len2+1);
 797     out.string = prog_tempstring(prog, buffer);
 798     mem_d(buffer);
 799     Return(out);
 800     return 0;
 801 }
 802
 803 static int qc_strcmp(qc_program *prog)
 804 {
 805     char  *cstr1, *cstr2;
 806     qcany *str1,  *str2;
 807     qcany out;
 808
 809     if (prog->argc != 2 && prog->argc != 3) {
 810         printf("ERROR: invalid number of arguments for strcmp/strncmp: %i, expected 2 or 3\n",
 811                prog->argc);
 812         return -1;
 813     }
 814
 815     str1 = GetArg(0);
 816     str2 = GetArg(1);
 817     cstr1 = prog_getstring(prog, str1->string);
 818     cstr2 = prog_getstring(prog, str2->string);
 819     if (prog->argc == 3)
 820         out._float = strncmp(cstr1, cstr2, GetArg(2)->_float);
 821     else
 822         out._float = strcmp(cstr1, cstr2);
 823     Return(out);
 824     return 0;
 825 }
 826
 827 static prog_builtin qc_builtins[] = {
 828     NULL,
 829     &qc_print,       /*   1   */
 830     &qc_ftos,        /*   2   */
 831     &qc_spawn,       /*   3   */
 832     &qc_kill,        /*   4   */
 833     &qc_vtos,        /*   5   */
 834     &qc_error,       /*   6   */
 835     &qc_vlen,        /*   7   */
 836     &qc_etos,        /*   8   */
 837     &qc_stof,        /*   9   */
 838     &qc_strcat,      /*   10  */
 839     &qc_strcmp,      /*   11  */
 840     &qc_normalize,   /*   12  */
 841     &qc_sqrt         /*   13  */
 842 };
 843 static size_t qc_builtins_count = sizeof(qc_builtins) / sizeof(qc_builtins[0]);
 844
 845 static const char *arg0 = NULL;
 846
 847 static void version() {
 848     printf("GMQCC-QCVM %d.%d.%d Built %s %s\n",
 849            GMQCC_VERSION_MAJOR,
 850            GMQCC_VERSION_MINOR,
 851            GMQCC_VERSION_PATCH,
 852            __DATE__,
 853            __TIME__
 854     );
 855 }
 856
 857 static void usage()
 858 {
 859     printf("usage: %s [options] [parameters] file\n", arg0);
 860     printf("options:\n");
 861     printf("  -h, --help         print this message\n"
 862            "  -trace             trace the execution\n"
 863            "  -profile           perform profiling during execution\n"
 864            "  -info              print information from the prog's header\n"
 865            "  -disasm            disassemble and exit\n"
 866            "  -disasm-func func  disassemble and exit\n"
 867            "  -printdefs         list the defs section\n"
 868            "  -printfields       list the field section\n"
 869            "  -printfuns         list functions information\n"
 870            "  -v                 be verbose\n"
 871            "  -vv                be even more verbose\n");
 872     printf("parameters:\n");
 873     printf("  -vector <V>   pass a vector parameter to main()\n"
 874            "  -float  <f>   pass a float parameter to main()\n"
 875            "  -string <s>   pass a string parameter to main() \n");
 876 }
 877
 878 static void prog_main_setparams(qc_program *prog)
 879 {
 880     size_t i;
 881     qcany *arg;
 882
 883     for (i = 0; i < vec_size(main_params); ++i) {
 884         arg = GetGlobal(OFS_PARM0 + 3*i);
 885         arg->vector[0] = 0;
 886         arg->vector[1] = 0;
 887         arg->vector[2] = 0;
 888         switch (main_params[i].vtype) {
 889             case TYPE_VECTOR:
 890 #ifdef _MSC_VER
 891                 (void)sscanf_s(main_params[i].value, " %f %f %f ",
 892                                &arg->vector[0],
 893                                &arg->vector[1],
 894                                &arg->vector[2]);
 895 #else
 896                 (void)sscanf(main_params[i].value, " %f %f %f ",
 897                              &arg->vector[0],
 898                              &arg->vector[1],
 899                              &arg->vector[2]);
 900 #endif
 901                 break;
 902             case TYPE_FLOAT:
 903                 arg->_float = atof(main_params[i].value);
 904                 break;
 905             case TYPE_STRING:
 906                 arg->string = prog_tempstring(prog, main_params[i].value);
 907                 break;
 908             default:
 909                 printf("error: unhandled parameter type: %i\n", main_params[i].vtype);
 910                 break;
 911         }
 912     }
 913 }
 914
 915 void prog_disasm_function(qc_program *prog, size_t id);
 916 int main(int argc, char **argv)
 917 {
 918     size_t      i;
 919     qcint       fnmain = -1;
 920     qc_program *prog;
 921     size_t      xflags = VMXF_DEFAULT;
 922     bool        opts_printfields = false;
 923     bool        opts_printdefs   = false;
 924     bool        opts_printfuns   = false;
 925     bool        opts_disasm      = false;
 926     bool        opts_info        = false;
 927     bool        noexec           = false;
 928     const char *progsfile        = NULL;
 929     const char **dis_list        = NULL;
 930     int         opts_v           = 0;
 931
 932     arg0 = argv[0];
 933
 934     if (argc < 2) {
 935         usage();
 936         exit(1);
 937     }
 938
 939     while (argc > 1) {
 940         if (!strcmp(argv[1], "-h") ||
 941             !strcmp(argv[1], "-help") ||
 942             !strcmp(argv[1], "--help"))
 943         {
 944             usage();
 945             exit(0);
 946         }
 947         else if (!strcmp(argv[1], "-v")) {
 948             ++opts_v;
 949             --argc;
 950             ++argv;
 951         }
 952         else if (!strncmp(argv[1], "-vv", 3)) {
 953             const char *av = argv[1]+1;
 954             for (; *av; ++av) {
 955                 if (*av == 'v')
 956                     ++opts_v;
 957                 else {
 958                     usage();
 959                     exit(1);
 960                 }
 961             }
 962             --argc;
 963             ++argv;
 964         }
 965         else if (!strcmp(argv[1], "-version") ||
 966                  !strcmp(argv[1], "--version"))
 967         {
 968             version();
 969             exit(0);
 970         }
 971         else if (!strcmp(argv[1], "-trace")) {
 972             --argc;
 973             ++argv;
 974             xflags |= VMXF_TRACE;
 975         }
 976         else if (!strcmp(argv[1], "-profile")) {
 977             --argc;
 978             ++argv;
 979             xflags |= VMXF_PROFILE;
 980         }
 981         else if (!strcmp(argv[1], "-info")) {
 982             --argc;
 983             ++argv;
 984             opts_info = true;
 985             noexec = true;
 986         }
 987         else if (!strcmp(argv[1], "-disasm")) {
 988             --argc;
 989             ++argv;
 990             opts_disasm = true;
 991             noexec = true;
 992         }
 993         else if (!strcmp(argv[1], "-disasm-func")) {
 994             --argc;
 995             ++argv;
 996             if (argc <= 1) {
 997                 usage();
 998                 exit(1);
 999             }
1000             vec_push(dis_list, argv[1]);
1001             --argc;
1002             ++argv;
1003             noexec = true;
1004         }
1005         else if (!strcmp(argv[1], "-printdefs")) {
1006             --argc;
1007             ++argv;
1008             opts_printdefs = true;
1009             noexec = true;
1010         }
1011         else if (!strcmp(argv[1], "-printfuns")) {
1012             --argc;
1013             ++argv;
1014             opts_printfuns = true;
1015             noexec = true;
1016         }
1017         else if (!strcmp(argv[1], "-printfields")) {
1018             --argc;
1019             ++argv;
1020             opts_printfields = true;
1021             noexec = true;
1022         }
1023         else if (!strcmp(argv[1], "-vector") ||
1024                  !strcmp(argv[1], "-string") ||
1025                  !strcmp(argv[1], "-float") )
1026         {
1027             qcvm_parameter p;
1028             if (argv[1][1] == 'f')
1029                 p.vtype = TYPE_FLOAT;
1030             else if (argv[1][1] == 's')
1031                 p.vtype = TYPE_STRING;
1032             else if (argv[1][1] == 'v')
1033                 p.vtype = TYPE_VECTOR;
1034
1035             --argc;
1036             ++argv;
1037             if (argc < 2) {
1038                 usage();
1039                 exit(1);
1040             }
1041             p.value = argv[1];
1042
1043             vec_push(main_params, p);
1044             --argc;
1045             ++argv;
1046         }
1047         else if (!strcmp(argv[1], "--")) {
1048             --argc;
1049             ++argv;
1050             break;
1051         }
1052         else if (argv[1][0] != '-') {
1053             if (progsfile) {
1054                 printf("only 1 program file may be specified\n");
1055                 usage();
1056                 exit(1);
1057             }
1058             progsfile = argv[1];
1059             --argc;
1060             ++argv;
1061         }
1062         else
1063         {
1064             printf("unknown parameter: %s\n", argv[1]);
1065             usage();
1066             exit(1);
1067         }
1068     }
1069
1070     if (argc == 2 && !progsfile) {
1071         progsfile = argv[1];
1072         --argc;
1073         ++argv;
1074     }
1075
1076     if (!progsfile) {
1077         printf("must specify a program to execute\n");
1078         usage();
1079         exit(1);
1080     }
1081
1082     prog = prog_load(progsfile);
1083     if (!prog) {
1084         printf("failed to load program '%s'\n", progsfile);
1085         exit(1);
1086     }
1087
1088     prog->builtins       = qc_builtins;
1089     prog->builtins_count = qc_builtins_count;
1090
1091     if (opts_info) {
1092         printf("Program's system-checksum = 0x%04x\n", (unsigned int)prog->crc16);
1093         printf("Entity field space: %u\n", (unsigned int)prog->entityfields);
1094         printf("Globals: %u\n", (unsigned int)vec_size(prog->globals));
1095         printf("Counts:\n"
1096                "      code: %lu\n"
1097                "      defs: %lu\n"
1098                "    fields: %lu\n"
1099                " functions: %lu\n"
1100                "   strings: %lu\n",
1101                (unsigned long)vec_size(prog->code),
1102                (unsigned long)vec_size(prog->defs),
1103                (unsigned long)vec_size(prog->fields),
1104                (unsigned long)vec_size(prog->functions),
1105                (unsigned long)vec_size(prog->strings));
1106     }
1107
1108     if (opts_info) {
1109         prog_delete(prog);
1110         return 0;
1111     }
1112     for (i = 0; i < vec_size(dis_list); ++i) {
1113         size_t k;
1114         printf("Looking for `%s`\n", dis_list[i]);
1115         for (k = 1; k < vec_size(prog->functions); ++k) {
1116             const char *name = prog_getstring(prog, prog->functions[k].name);
1117             if (!strcmp(name, dis_list[i])) {
1118                 prog_disasm_function(prog, k);
1119                 break;
1120             }
1121         }
1122     }
1123     if (opts_disasm) {
1124         for (i = 1; i < vec_size(prog->functions); ++i)
1125             prog_disasm_function(prog, i);
1126         return 0;
1127     }
1128     if (opts_printdefs) {
1129         for (i = 0; i < vec_size(prog->defs); ++i) {
1130             printf("Global: %8s %-16s at %u%s\n",
1131                    type_name[prog->defs[i].type & DEF_TYPEMASK],
1132                    prog_getstring(prog, prog->defs[i].name),
1133                    (unsigned int)prog->defs[i].offset,
1134                    ((prog->defs[i].type & DEF_SAVEGLOBAL) ? " [SAVE]" : ""));
1135         }
1136     }
1137     if (opts_printfields) {
1138         for (i = 0; i < vec_size(prog->fields); ++i) {
1139             printf("Field: %8s %-16s at %u%s\n",
1140                    type_name[prog->fields[i].type],
1141                    prog_getstring(prog, prog->fields[i].name),
1142                    (unsigned int)prog->fields[i].offset,
1143                    ((prog->fields[i].type & DEF_SAVEGLOBAL) ? " [SAVE]" : ""));
1144         }
1145     }
1146     if (opts_printfuns) {
1147         for (i = 0; i < vec_size(prog->functions); ++i) {
1148             int32_t a;
1149             printf("Function: %-16s taking %i parameters:(",
1150                    prog_getstring(prog, prog->functions[i].name),
1151                    (unsigned int)prog->functions[i].nargs);
1152             for (a = 0; a < prog->functions[i].nargs; ++a) {
1153                 printf(" %i", prog->functions[i].argsize[a]);
1154             }
1155             if (opts_v > 1) {
1156                 int32_t start = prog->functions[i].entry;
1157                 if (start < 0)
1158                     printf(") builtin %i\n", (int)-start);
1159                 else {
1160                     size_t funsize = 0;
1161                     prog_section_statement *st = prog->code + start;
1162                     for (;st->opcode != INSTR_DONE; ++st)
1163                         ++funsize;
1164                     printf(") - %lu instructions", (unsigned long)funsize);
1165                     if (opts_v > 2) {
1166                         printf(" - locals: %i + %i\n",
1167                                prog->functions[i].firstlocal,
1168                                prog->functions[i].locals);
1169                     }
1170                     else
1171                         printf("\n");
1172                 }
1173             }
1174             else if (opts_v) {
1175                 printf(") locals: %i + %i\n",
1176                        prog->functions[i].firstlocal,
1177                        prog->functions[i].locals);
1178             }
1179             else
1180                 printf(")\n");
1181         }
1182     }
1183     if (!noexec) {
1184         for (i = 1; i < vec_size(prog->functions); ++i) {
1185             const char *name = prog_getstring(prog, prog->functions[i].name);
1186             if (!strcmp(name, "main"))
1187                 fnmain = (qcint)i;
1188         }
1189         if (fnmain > 0)
1190         {
1191             prog_main_setparams(prog);
1192             prog_exec(prog, &prog->functions[fnmain], xflags, VM_JUMPS_DEFAULT);
1193         }
1194         else
1195             printf("No main function found\n");
1196     }
1197
1198     prog_delete(prog);
1199     return 0;
1200 }
1201
1202 void prog_disasm_function(qc_program *prog, size_t id)
1203 {
1204     prog_section_function *fdef = prog->functions + id;
1205     prog_section_statement *st;
1206
1207     if (fdef->entry < 0) {
1208         printf("FUNCTION \"%s\" = builtin #%i\n", prog_getstring(prog, fdef->name), (int)-fdef->entry);
1209         return;
1210     }
1211     else
1212         printf("FUNCTION \"%s\"\n", prog_getstring(prog, fdef->name));
1213
1214     st = prog->code + fdef->entry;
1215     while (st->opcode != INSTR_DONE) {
1216         prog_print_statement(prog, st);
1217         ++st;
1218     }
1219 }
1220 #endif
1221 #else /* !QCVM_LOOP */
1222 /*
1223  * Everything from here on is not including into the compilation of the
1224  * executor.  This is simply code that is #included via #include __FILE__
1225  * see when QCVM_LOOP is defined, the rest of the code above do not get
1226  * re-included.  So this really just acts like one large macro, but it
1227  * sort of isn't, which makes it nicer looking.
1228  */
1229
1230 #define OPA ( (qcany*) (prog->globals + st->o1.u1) )
1231 #define OPB ( (qcany*) (prog->globals + st->o2.u1) )
1232 #define OPC ( (qcany*) (prog->globals + st->o3.u1) )
1233
1234 #define GLOBAL(x) ( (qcany*) (prog->globals + (x)) )
1235
1236 /* to be consistent with current darkplaces behaviour */
1237 #if !defined(FLOAT_IS_TRUE_FOR_INT)
1238 #   define FLOAT_IS_TRUE_FOR_INT(x) ( (x) & 0x7FFFFFFF )
1239 #endif
1240
1241 while (1) {
1242     prog_section_function  *newf;
1243     qcany          *ed;
1244     qcany          *ptr;
1245
1246     ++st;
1247
1248 #if QCVM_PROFILE
1249     prog->profile[st - prog->code]++;
1250 #endif
1251
1252 #if QCVM_TRACE
1253     prog_print_statement(prog, st);
1254 #endif
1255
1256     switch (st->opcode)
1257     {
1258         default:
1259             qcvmerror(prog, "Illegal instruction in %s\n", prog->filename);
1260             goto cleanup;
1261
1262         case INSTR_DONE:
1263         case INSTR_RETURN:
1264             /* TODO: add instruction count to function profile count */
1265             GLOBAL(OFS_RETURN)->ivector[0] = OPA->ivector[0];
1266             GLOBAL(OFS_RETURN)->ivector[1] = OPA->ivector[1];
1267             GLOBAL(OFS_RETURN)->ivector[2] = OPA->ivector[2];
1268
1269             st = prog->code + prog_leavefunction(prog);
1270             if (!vec_size(prog->stack))
1271                 goto cleanup;
1272
1273             break;
1274
1275         case INSTR_MUL_F:
1276             OPC->_float = OPA->_float * OPB->_float;
1277             break;
1278         case INSTR_MUL_V:
1279             OPC->_float = OPA->vector[0]*OPB->vector[0] +
1280                           OPA->vector[1]*OPB->vector[1] +
1281                           OPA->vector[2]*OPB->vector[2];
1282             break;
1283         case INSTR_MUL_FV:
1284             OPC->vector[0] = OPA->_float * OPB->vector[0];
1285             OPC->vector[1] = OPA->_float * OPB->vector[1];
1286             OPC->vector[2] = OPA->_float * OPB->vector[2];
1287             break;
1288         case INSTR_MUL_VF:
1289             OPC->vector[0] = OPB->_float * OPA->vector[0];
1290             OPC->vector[1] = OPB->_float * OPA->vector[1];
1291             OPC->vector[2] = OPB->_float * OPA->vector[2];
1292             break;
1293         case INSTR_DIV_F:
1294             if (OPB->_float != 0.0f)
1295                 OPC->_float = OPA->_float / OPB->_float;
1296             else
1297                 OPC->_float = 0;
1298             break;
1299
1300         case INSTR_ADD_F:
1301             OPC->_float = OPA->_float + OPB->_float;
1302             break;
1303         case INSTR_ADD_V:
1304             OPC->vector[0] = OPA->vector[0] + OPB->vector[0];
1305             OPC->vector[1] = OPA->vector[1] + OPB->vector[1];
1306             OPC->vector[2] = OPA->vector[2] + OPB->vector[2];
1307             break;
1308         case INSTR_SUB_F:
1309             OPC->_float = OPA->_float - OPB->_float;
1310             break;
1311         case INSTR_SUB_V:
1312             OPC->vector[0] = OPA->vector[0] - OPB->vector[0];
1313             OPC->vector[1] = OPA->vector[1] - OPB->vector[1];
1314             OPC->vector[2] = OPA->vector[2] - OPB->vector[2];
1315             break;
1316
1317         case INSTR_EQ_F:
1318             OPC->_float = (OPA->_float == OPB->_float);
1319             break;
1320         case INSTR_EQ_V:
1321             OPC->_float = ((OPA->vector[0] == OPB->vector[0]) &&
1322                            (OPA->vector[1] == OPB->vector[1]) &&
1323                            (OPA->vector[2] == OPB->vector[2]) );
1324             break;
1325         case INSTR_EQ_S:
1326             OPC->_float = !strcmp(prog_getstring(prog, OPA->string),
1327                                   prog_getstring(prog, OPB->string));
1328             break;
1329         case INSTR_EQ_E:
1330             OPC->_float = (OPA->_int == OPB->_int);
1331             break;
1332         case INSTR_EQ_FNC:
1333             OPC->_float = (OPA->function == OPB->function);
1334             break;
1335         case INSTR_NE_F:
1336             OPC->_float = (OPA->_float != OPB->_float);
1337             break;
1338         case INSTR_NE_V:
1339             OPC->_float = ((OPA->vector[0] != OPB->vector[0]) ||
1340                            (OPA->vector[1] != OPB->vector[1]) ||
1341                            (OPA->vector[2] != OPB->vector[2]) );
1342             break;
1343         case INSTR_NE_S:
1344             OPC->_float = !!strcmp(prog_getstring(prog, OPA->string),
1345                                    prog_getstring(prog, OPB->string));
1346             break;
1347         case INSTR_NE_E:
1348             OPC->_float = (OPA->_int != OPB->_int);
1349             break;
1350         case INSTR_NE_FNC:
1351             OPC->_float = (OPA->function != OPB->function);
1352             break;
1353
1354         case INSTR_LE:
1355             OPC->_float = (OPA->_float <= OPB->_float);
1356             break;
1357         case INSTR_GE:
1358             OPC->_float = (OPA->_float >= OPB->_float);
1359             break;
1360         case INSTR_LT:
1361             OPC->_float = (OPA->_float < OPB->_float);
1362             break;
1363         case INSTR_GT:
1364             OPC->_float = (OPA->_float > OPB->_float);
1365             break;
1366
1367         case INSTR_LOAD_F:
1368         case INSTR_LOAD_S:
1369         case INSTR_LOAD_FLD:
1370         case INSTR_LOAD_ENT:
1371         case INSTR_LOAD_FNC:
1372             if (OPA->edict < 0 || OPA->edict >= prog->entities) {
1373                 qcvmerror(prog, "progs `%s` attempted to read an out of bounds entity", prog->filename);
1374                 goto cleanup;
1375             }
1376             if ((unsigned int)(OPB->_int) >= (unsigned int)(prog->entityfields)) {
1377                 qcvmerror(prog, "prog `%s` attempted to read an invalid field from entity (%i)",
1378                           prog->filename,
1379                           OPB->_int);
1380                 goto cleanup;
1381             }
1382             ed = prog_getedict(prog, OPA->edict);
1383             OPC->_int = ((qcany*)( ((qcint*)ed) + OPB->_int ))->_int;
1384             break;
1385         case INSTR_LOAD_V:
1386             if (OPA->edict < 0 || OPA->edict >= prog->entities) {
1387                 qcvmerror(prog, "progs `%s` attempted to read an out of bounds entity", prog->filename);
1388                 goto cleanup;
1389             }
1390             if (OPB->_int < 0 || OPB->_int + 3 > (qcint)prog->entityfields)
1391             {
1392                 qcvmerror(prog, "prog `%s` attempted to read an invalid field from entity (%i)",
1393                           prog->filename,
1394                           OPB->_int + 2);
1395                 goto cleanup;
1396             }
1397             ed = prog_getedict(prog, OPA->edict);
1398             OPC->ivector[0] = ((qcany*)( ((qcint*)ed) + OPB->_int ))->ivector[0];
1399             OPC->ivector[1] = ((qcany*)( ((qcint*)ed) + OPB->_int ))->ivector[1];
1400             OPC->ivector[2] = ((qcany*)( ((qcint*)ed) + OPB->_int ))->ivector[2];
1401             break;
1402
1403         case INSTR_ADDRESS:
1404             if (OPA->edict < 0 || OPA->edict >= prog->entities) {
1405                 qcvmerror(prog, "prog `%s` attempted to address an out of bounds entity %i", prog->filename, OPA->edict);
1406                 goto cleanup;
1407             }
1408             if ((unsigned int)(OPB->_int) >= (unsigned int)(prog->entityfields))
1409             {
1410                 qcvmerror(prog, "prog `%s` attempted to read an invalid field from entity (%i)",
1411                           prog->filename,
1412                           OPB->_int);
1413                 goto cleanup;
1414             }
1415
1416             ed = prog_getedict(prog, OPA->edict);
1417             OPC->_int = ((qcint*)ed) - prog->entitydata + OPB->_int;
1418             break;
1419
1420         case INSTR_STORE_F:
1421         case INSTR_STORE_S:
1422         case INSTR_STORE_ENT:
1423         case INSTR_STORE_FLD:
1424         case INSTR_STORE_FNC:
1425             OPB->_int = OPA->_int;
1426             break;
1427         case INSTR_STORE_V:
1428             OPB->ivector[0] = OPA->ivector[0];
1429             OPB->ivector[1] = OPA->ivector[1];
1430             OPB->ivector[2] = OPA->ivector[2];
1431             break;
1432
1433         case INSTR_STOREP_F:
1434         case INSTR_STOREP_S:
1435         case INSTR_STOREP_ENT:
1436         case INSTR_STOREP_FLD:
1437         case INSTR_STOREP_FNC:
1438             if (OPB->_int < 0 || OPB->_int >= (qcint)vec_size(prog->entitydata)) {
1439                 qcvmerror(prog, "`%s` attempted to write to an out of bounds edict (%i)", prog->filename, OPB->_int);
1440                 goto cleanup;
1441             }
1442             if (OPB->_int < (qcint)prog->entityfields && !prog->allowworldwrites)
1443                 qcvmerror(prog, "`%s` tried to assign to world.%s (field %i)\n",
1444                           prog->filename,
1445                           prog_getstring(prog, prog_entfield(prog, OPB->_int)->name),
1446                           OPB->_int);
1447             ptr = (qcany*)(prog->entitydata + OPB->_int);
1448             ptr->_int = OPA->_int;
1449             break;
1450         case INSTR_STOREP_V:
1451             if (OPB->_int < 0 || OPB->_int + 2 >= (qcint)vec_size(prog->entitydata)) {
1452                 qcvmerror(prog, "`%s` attempted to write to an out of bounds edict (%i)", prog->filename, OPB->_int);
1453                 goto cleanup;
1454             }
1455             if (OPB->_int < (qcint)prog->entityfields && !prog->allowworldwrites)
1456                 qcvmerror(prog, "`%s` tried to assign to world.%s (field %i)\n",
1457                           prog->filename,
1458                           prog_getstring(prog, prog_entfield(prog, OPB->_int)->name),
1459                           OPB->_int);
1460             ptr = (qcany*)(prog->entitydata + OPB->_int);
1461             ptr->ivector[0] = OPA->ivector[0];
1462             ptr->ivector[1] = OPA->ivector[1];
1463             ptr->ivector[2] = OPA->ivector[2];
1464             break;
1465
1466         case INSTR_NOT_F:
1467             OPC->_float = !FLOAT_IS_TRUE_FOR_INT(OPA->_int);
1468             break;
1469         case INSTR_NOT_V:
1470             OPC->_float = !OPA->vector[0] &&
1471                           !OPA->vector[1] &&
1472                           !OPA->vector[2];
1473             break;
1474         case INSTR_NOT_S:
1475             OPC->_float = !OPA->string ||
1476                           !*prog_getstring(prog, OPA->string);
1477             break;
1478         case INSTR_NOT_ENT:
1479             OPC->_float = (OPA->edict == 0);
1480             break;
1481         case INSTR_NOT_FNC:
1482             OPC->_float = !OPA->function;
1483             break;
1484
1485         case INSTR_IF:
1486             /* this is consistent with darkplaces' behaviour */
1487             if(FLOAT_IS_TRUE_FOR_INT(OPA->_int))
1488             {
1489                 st += st->o2.s1 - 1;    /* offset the s++ */
1490                 if (++jumpcount >= maxjumps)
1491                     qcvmerror(prog, "`%s` hit the runaway loop counter limit of %li jumps", prog->filename, jumpcount);
1492             }
1493             break;
1494         case INSTR_IFNOT:
1495             if(!FLOAT_IS_TRUE_FOR_INT(OPA->_int))
1496             {
1497                 st += st->o2.s1 - 1;    /* offset the s++ */
1498                 if (++jumpcount >= maxjumps)
1499                     qcvmerror(prog, "`%s` hit the runaway loop counter limit of %li jumps", prog->filename, jumpcount);
1500             }
1501             break;
1502
1503         case INSTR_CALL0:
1504         case INSTR_CALL1:
1505         case INSTR_CALL2:
1506         case INSTR_CALL3:
1507         case INSTR_CALL4:
1508         case INSTR_CALL5:
1509         case INSTR_CALL6:
1510         case INSTR_CALL7:
1511         case INSTR_CALL8:
1512             prog->argc = st->opcode - INSTR_CALL0;
1513             if (!OPA->function)
1514                 qcvmerror(prog, "NULL function in `%s`", prog->filename);
1515
1516             if(!OPA->function || OPA->function >= (qcint)vec_size(prog->functions))
1517             {
1518                 qcvmerror(prog, "CALL outside the program in `%s`", prog->filename);
1519                 goto cleanup;
1520             }
1521
1522             newf = &prog->functions[OPA->function];
1523             newf->profile++;
1524
1525             prog->statement = (st - prog->code) + 1;
1526
1527             if (newf->entry < 0)
1528             {
1529                 /* negative statements are built in functions */
1530                 qcint builtinnumber = -newf->entry;
1531                 if (builtinnumber < (qcint)prog->builtins_count && prog->builtins[builtinnumber])
1532                     prog->builtins[builtinnumber](prog);
1533                 else
1534                     qcvmerror(prog, "No such builtin #%i in %s! Try updating your gmqcc sources",
1535                               builtinnumber, prog->filename);
1536             }
1537             else
1538                 st = prog->code + prog_enterfunction(prog, newf) - 1; /* offset st++ */
1539             if (prog->vmerror)
1540                 goto cleanup;
1541             break;
1542
1543         case INSTR_STATE:
1544             qcvmerror(prog, "`%s` tried to execute a STATE operation", prog->filename);
1545             break;
1546
1547         case INSTR_GOTO:
1548             st += st->o1.s1 - 1;    /* offset the s++ */
1549             if (++jumpcount == 10000000)
1550                 qcvmerror(prog, "`%s` hit the runaway loop counter limit of %li jumps", prog->filename, jumpcount);
1551             break;
1552
1553         case INSTR_AND:
1554             OPC->_float = FLOAT_IS_TRUE_FOR_INT(OPA->_int) &&
1555                           FLOAT_IS_TRUE_FOR_INT(OPB->_int);
1556             break;
1557         case INSTR_OR:
1558             OPC->_float = FLOAT_IS_TRUE_FOR_INT(OPA->_int) ||
1559                           FLOAT_IS_TRUE_FOR_INT(OPB->_int);
1560             break;
1561
1562         case INSTR_BITAND:
1563             OPC->_float = ((int)OPA->_float) & ((int)OPB->_float);
1564             break;
1565         case INSTR_BITOR:
1566             OPC->_float = ((int)OPA->_float) | ((int)OPB->_float);
1567             break;
1568     }
1569 }
1570
1571 #undef QCVM_PROFILE
1572 #undef QCVM_TRACE
1573 #endif /* !QCVM_LOOP */