exec.c

   1 #include <errno.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <stdarg.h>
   5
   6 #include "gmqcc.h"
   7
   8 MEM_VEC_FUNCTIONS(qc_program,   prog_section_statement, code)
   9 MEM_VEC_FUNCTIONS(qc_program,   prog_section_def,       defs)
  10 MEM_VEC_FUNCTIONS(qc_program,   prog_section_def,       fields)
  11 MEM_VEC_FUNCTIONS(qc_program,   prog_section_function,  functions)
  12 MEM_VEC_FUNCTIONS(qc_program,   char,                   strings)
  13 MEM_VEC_FUN_APPEND(qc_program,  char,                   strings)
  14 MEM_VEC_FUN_RESIZE(qc_program,  char,                   strings)
  15 MEM_VEC_FUNCTIONS(qc_program,   qcint,                  globals)
  16 MEM_VEC_FUNCTIONS(qc_program,   qcint,                  entitydata)
  17 MEM_VEC_FUNCTIONS(qc_program,   bool,                   entitypool)
  18
  19 MEM_VEC_FUNCTIONS(qc_program,   qcint,         localstack)
  20 MEM_VEC_FUN_APPEND(qc_program,  qcint,         localstack)
  21 MEM_VEC_FUN_RESIZE(qc_program,  qcint,         localstack)
  22 MEM_VEC_FUNCTIONS(qc_program,   qc_exec_stack, stack)
  23
  24 MEM_VEC_FUNCTIONS(qc_program,   size_t, profile)
  25 MEM_VEC_FUN_RESIZE(qc_program,  size_t, profile)
  26
  27 MEM_VEC_FUNCTIONS(qc_program,   prog_builtin, builtins)
  28
  29 static void loaderror(const char *fmt, ...)
  30 {
  31     int     err = errno;
  32     va_list ap;
  33     va_start(ap, fmt);
  34     vprintf(fmt, ap);
  35     va_end(ap);
  36     printf(": %s\n", strerror(err));
  37 }
  38
  39 static void qcvmerror(qc_program *prog, const char *fmt, ...)
  40 {
  41     va_list ap;
  42
  43     prog->vmerror++;
  44
  45     va_start(ap, fmt);
  46     vprintf(fmt, ap);
  47     va_end(ap);
  48     putchar('\n');
  49 }
  50
  51 qc_program* prog_load(const char *filename)
  52 {
  53     qc_program *prog;
  54     prog_header header;
  55     size_t      i;
  56     FILE *file;
  57
  58     file = util_fopen(filename, "rb");
  59     if (!file)
  60         return NULL;
  61
  62     if (fread(&header, sizeof(header), 1, file) != 1) {
  63         loaderror("failed to read header from '%s'", filename);
  64         fclose(file);
  65         return NULL;
  66     }
  67
  68     if (header.version != 6) {
  69         loaderror("header says this is a version %i progs, we need version 6\n", header.version);
  70         fclose(file);
  71         return NULL;
  72     }
  73
  74     prog = (qc_program*)mem_a(sizeof(qc_program));
  75     if (!prog) {
  76         fclose(file);
  77         printf("failed to allocate program data\n");
  78         return NULL;
  79     }
  80     memset(prog, 0, sizeof(*prog));
  81
  82     prog->entityfields = header.entfield;
  83     prog->crc16 = header.crc16;
  84
  85     prog->filename = util_strdup(filename);
  86     if (!prog->filename) {
  87         loaderror("failed to store program name");
  88         goto error;
  89     }
  90
  91 #define read_data(hdrvar, progvar, type)                                         \
  92     if (fseek(file, header.hdrvar.offset, SEEK_SET) != 0) {                      \
  93         loaderror("seek failed");                                                \
  94         goto error;                                                              \
  95     }                                                                            \
  96     prog->progvar##_alloc = header.hdrvar.length;                                \
  97     prog->progvar##_count = header.hdrvar.length;                                \
  98     prog->progvar = (type*)mem_a(header.hdrvar.length * sizeof(*prog->progvar)); \
  99     if (!prog->progvar)                                                          \
 100         goto error;                                                              \
 101     if (fread(prog->progvar, sizeof(*prog->progvar), header.hdrvar.length, file) \
 102         != header.hdrvar.length) {                                               \
 103         loaderror("read failed");                                                \
 104         goto error;                                                              \
 105     }
 106 #define read_data1(x, y) read_data(x, x, y)
 107
 108     read_data (statements, code, prog_section_statement);
 109     read_data1(defs,             prog_section_def);
 110     read_data1(fields,           prog_section_def);
 111     read_data1(functions,        prog_section_function);
 112     read_data1(strings,          char);
 113     read_data1(globals,          qcint);
 114
 115     fclose(file);
 116
 117     /* profile counters */
 118     if (!qc_program_profile_resize(prog, prog->code_count))
 119         goto error;
 120
 121     /* Add tempstring area */
 122     prog->tempstring_start = prog->strings_count;
 123     prog->tempstring_at    = prog->strings_count;
 124     if (!qc_program_strings_resize(prog, prog->strings_count + 16*1024))
 125         goto error;
 126
 127     /* spawn the world entity */
 128     if (!qc_program_entitypool_add(prog, true)) {
 129         loaderror("failed to allocate world entity\n");
 130         goto error;
 131     }
 132     for (i = 0; i < prog->entityfields; ++i) {
 133         if (!qc_program_entitydata_add(prog, 0)) {
 134             loaderror("failed to allocate world data\n");
 135             goto error;
 136         }
 137     }
 138     prog->entities = 1;
 139
 140     return prog;
 141
 142 error:
 143     if (prog->filename)   mem_d(prog->filename);
 144     if (prog->code)       mem_d(prog->code);
 145     if (prog->defs)       mem_d(prog->defs);
 146     if (prog->fields)     mem_d(prog->fields);
 147     if (prog->functions)  mem_d(prog->functions);
 148     if (prog->strings)    mem_d(prog->strings);
 149     if (prog->globals)    mem_d(prog->globals);
 150     if (prog->entitydata) mem_d(prog->entitydata);
 151     if (prog->entitypool) mem_d(prog->entitypool);
 152     mem_d(prog);
 153     return NULL;
 154 }
 155
 156 void prog_delete(qc_program *prog)
 157 {
 158     if (prog->filename) mem_d(prog->filename);
 159     MEM_VECTOR_CLEAR(prog, code);
 160     MEM_VECTOR_CLEAR(prog, defs);
 161     MEM_VECTOR_CLEAR(prog, fields);
 162     MEM_VECTOR_CLEAR(prog, functions);
 163     MEM_VECTOR_CLEAR(prog, strings);
 164     MEM_VECTOR_CLEAR(prog, globals);
 165     MEM_VECTOR_CLEAR(prog, entitydata);
 166     MEM_VECTOR_CLEAR(prog, entitypool);
 167     MEM_VECTOR_CLEAR(prog, localstack);
 168     MEM_VECTOR_CLEAR(prog, stack);
 169     MEM_VECTOR_CLEAR(prog, profile);
 170
 171     if (prog->builtins_alloc) {
 172         MEM_VECTOR_CLEAR(prog, builtins);
 173     }
 174     /* otherwise the builtins were statically allocated */
 175     mem_d(prog);
 176 }
 177
 178 /***********************************************************************
 179  * VM code
 180  */
 181
 182 char* prog_getstring(qc_program *prog, qcint str)
 183 {
 184     if (str < 0 || str >= prog->strings_count)
 185         return "<<<invalid string>>>";
 186     return prog->strings + str;
 187 }
 188
 189 prog_section_def* prog_entfield(qc_program *prog, qcint off)
 190 {
 191     size_t i;
 192     for (i = 0; i < prog->fields_count; ++i) {
 193         if (prog->fields[i].offset == off)
 194             return (prog->fields + i);
 195     }
 196     return NULL;
 197 }
 198
 199 prog_section_def* prog_getdef(qc_program *prog, qcint off)
 200 {
 201     size_t i;
 202     for (i = 0; i < prog->defs_count; ++i) {
 203         if (prog->defs[i].offset == off)
 204             return (prog->defs + i);
 205     }
 206     return NULL;
 207 }
 208
 209 qcany* prog_getedict(qc_program *prog, qcint e)
 210 {
 211     if (e >= prog->entitypool_count) {
 212         prog->vmerror++;
 213         printf("Accessing out of bounds edict %i\n", (int)e);
 214         e = 0;
 215     }
 216     return (qcany*)(prog->entitydata + (prog->entityfields * e));
 217 }
 218
 219 qcint prog_spawn_entity(qc_program *prog)
 220 {
 221     size_t i;
 222     qcint  e;
 223     for (e = 0; e < (qcint)prog->entitypool_count; ++e) {
 224         if (!prog->entitypool[e]) {
 225             char *data = (char*)(prog->entitydata + (prog->entityfields * e));
 226             memset(data, 0, prog->entityfields * sizeof(qcint));
 227             return e;
 228         }
 229     }
 230     if (!qc_program_entitypool_add(prog, true)) {
 231         prog->vmerror++;
 232         printf("Failed to allocate entity\n");
 233         return 0;
 234     }
 235     prog->entities++;
 236     for (i = 0; i < prog->entityfields; ++i) {
 237         if (!qc_program_entitydata_add(prog, 0)) {
 238             printf("Failed to allocate entity\n");
 239             return 0;
 240         }
 241     }
 242     return e;
 243 }
 244
 245 void prog_free_entity(qc_program *prog, qcint e)
 246 {
 247     if (!e) {
 248         prog->vmerror++;
 249         printf("Trying to free world entity\n");
 250         return;
 251     }
 252     if (e >= prog->entitypool_count) {
 253         prog->vmerror++;
 254         printf("Trying to free out of bounds entity\n");
 255         return;
 256     }
 257     if (!prog->entitypool[e]) {
 258         prog->vmerror++;
 259         printf("Double free on entity\n");
 260         return;
 261     }
 262     prog->entitypool[e] = false;
 263 }
 264
 265 qcint prog_tempstring(qc_program *prog, const char *_str)
 266 {
 267     /* we don't access it, but the macro-generated functions don't use
 268      * const
 269      */
 270     char *str = (char*)_str;
 271
 272     size_t len = strlen(str);
 273     size_t at = prog->tempstring_at;
 274
 275     /* when we reach the end we start over */
 276     if (at + len >= prog->strings_count)
 277         at = prog->tempstring_start;
 278
 279     /* when it doesn't fit, reallocate */
 280     if (at + len >= prog->strings_count)
 281     {
 282         prog->strings_count = at;
 283         if (!qc_program_strings_append(prog, str, len+1)) {
 284             prog->vmerror = VMERR_TEMPSTRING_ALLOC;
 285             return 0;
 286         }
 287         return at;
 288     }
 289
 290     /* when it fits, just copy */
 291     memcpy(prog->strings + at, str, len+1);
 292     prog->tempstring_at += len+1;
 293     return at;
 294 }
 295
 296 static int print_escaped_string(const char *str)
 297 {
 298     int len = 2;
 299     putchar('"');
 300     while (*str) {
 301         switch (*str) {
 302             case '\a': len += 2; putchar('\\'); putchar('a'); break;
 303             case '\b': len += 2; putchar('\\'); putchar('b'); break;
 304             case '\r': len += 2; putchar('\\'); putchar('r'); break;
 305             case '\n': len += 2; putchar('\\'); putchar('n'); break;
 306             case '\t': len += 2; putchar('\\'); putchar('t'); break;
 307             case '\f': len += 2; putchar('\\'); putchar('f'); break;
 308             case '\v': len += 2; putchar('\\'); putchar('v'); break;
 309             case '\\': len += 2; putchar('\\'); putchar('\\'); break;
 310             case '"':  len += 2; putchar('\\'); putchar('"'); break;
 311             default:
 312                 ++len;
 313                 putchar(*str);
 314                 break;
 315         }
 316         ++str;
 317     }
 318     putchar('"');
 319     return len;
 320 }
 321
 322 static void trace_print_global(qc_program *prog, unsigned int glob, int vtype)
 323 {
 324     static char spaces[40+1] = "                                        ";
 325     prog_section_def *def;
 326     qcany    *value;
 327     int       len;
 328
 329     if (!glob) {
 330         len = printf("<null>,");
 331         goto done;
 332     }
 333
 334     def = prog_getdef(prog, glob);
 335     value = (qcany*)(&prog->globals[glob]);
 336
 337     if (def) {
 338         len = printf("[%s] ", prog_getstring(prog, def->name));
 339         vtype = def->type;
 340     }
 341     else
 342         len = printf("[@%u] ", glob);
 343
 344     switch (vtype) {
 345         case TYPE_VOID:
 346         case TYPE_ENTITY:
 347         case TYPE_FIELD:
 348         case TYPE_FUNCTION:
 349         case TYPE_POINTER:
 350             len += printf("%i,", value->_int);
 351             break;
 352         case TYPE_VECTOR:
 353             len += printf("'%g %g %g',", value->vector[0],
 354                                          value->vector[1],
 355                                          value->vector[2]);
 356             break;
 357         case TYPE_STRING:
 358             len += print_escaped_string(prog_getstring(prog, value->string));
 359             len += printf(",");
 360             /* len += printf("\"%s\",", prog_getstring(prog, value->string)); */
 361             break;
 362         case TYPE_FLOAT:
 363         default:
 364             len += printf("%g,", value->_float);
 365             break;
 366     }
 367 done:
 368     if (len < sizeof(spaces)-1) {
 369         spaces[sizeof(spaces)-1-len] = 0;
 370         printf(spaces);
 371         spaces[sizeof(spaces)-1-len] = ' ';
 372     }
 373 }
 374
 375 static void prog_print_statement(qc_program *prog, prog_section_statement *st)
 376 {
 377     if (st->opcode >= (sizeof(asm_instr)/sizeof(asm_instr[0]))) {
 378         printf("<illegal instruction %d>\n", st->opcode);
 379         return;
 380     }
 381     printf(" <> %-12s", asm_instr[st->opcode].m);
 382     if (st->opcode >= INSTR_IF &&
 383         st->opcode <= INSTR_IFNOT)
 384     {
 385         trace_print_global(prog, st->o1.u1, TYPE_FLOAT);
 386         printf("%d\n", st->o2.s1);
 387     }
 388     else if (st->opcode >= INSTR_CALL0 &&
 389              st->opcode <= INSTR_CALL8)
 390     {
 391         printf("\n");
 392     }
 393     else if (st->opcode == INSTR_GOTO)
 394     {
 395         printf("%i\n", st->o1.s1);
 396     }
 397     else
 398     {
 399         int t[3] = { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT };
 400         switch (st->opcode)
 401         {
 402             case INSTR_MUL_FV:
 403                 t[1] = t[2] = TYPE_VECTOR;
 404                 break;
 405             case INSTR_MUL_VF:
 406                 t[0] = t[2] = TYPE_VECTOR;
 407                 break;
 408             case INSTR_MUL_V:
 409                 t[0] = t[1] = TYPE_VECTOR;
 410                 break;
 411             case INSTR_ADD_V:
 412             case INSTR_SUB_V:
 413             case INSTR_EQ_V:
 414             case INSTR_NE_V:
 415                 t[0] = t[1] = t[2] = TYPE_VECTOR;
 416                 break;
 417             case INSTR_EQ_S:
 418             case INSTR_NE_S:
 419                 t[0] = t[1] = TYPE_STRING;
 420                 break;
 421             case INSTR_STORE_F:
 422             case INSTR_STOREP_F:
 423                 t[2] = -1;
 424                 break;
 425             case INSTR_STORE_V:
 426                 t[0] = t[1] = TYPE_VECTOR; t[2] = -1;
 427                 break;
 428             case INSTR_STORE_S:
 429                 t[0] = t[1] = TYPE_STRING; t[2] = -1;
 430                 break;
 431             case INSTR_STORE_ENT:
 432                 t[0] = t[1] = TYPE_ENTITY; t[2] = -1;
 433                 break;
 434             case INSTR_STORE_FLD:
 435                 t[0] = t[1] = TYPE_FIELD; t[2] = -1;
 436                 break;
 437             case INSTR_STORE_FNC:
 438                 t[0] = t[1] = TYPE_FUNCTION; t[2] = -1;
 439                 break;
 440             case INSTR_STOREP_V:
 441                 t[0] = TYPE_VECTOR; t[1] = TYPE_ENTITY; t[2] = -1;
 442                 break;
 443             case INSTR_STOREP_S:
 444                 t[0] = TYPE_STRING; t[1] = TYPE_ENTITY; t[2] = -1;
 445                 break;
 446             case INSTR_STOREP_ENT:
 447                 t[0] = TYPE_ENTITY; t[1] = TYPE_ENTITY; t[2] = -1;
 448                 break;
 449             case INSTR_STOREP_FLD:
 450                 t[0] = TYPE_FIELD; t[1] = TYPE_ENTITY; t[2] = -1;
 451                 break;
 452             case INSTR_STOREP_FNC:
 453                 t[0] = TYPE_FUNCTION; t[1] = TYPE_ENTITY; t[2] = -1;
 454                 break;
 455         }
 456         if (t[0] >= 0) trace_print_global(prog, st->o1.u1, t[0]);
 457         else           printf("(none),          ");
 458         if (t[1] >= 0) trace_print_global(prog, st->o2.u1, t[1]);
 459         else           printf("(none),          ");
 460         if (t[2] >= 0) trace_print_global(prog, st->o3.u1, t[2]);
 461         else           printf("(none)");
 462         printf("\n");
 463     }
 464     fflush(stdout);
 465 }
 466
 467 static qcint prog_enterfunction(qc_program *prog, prog_section_function *func)
 468 {
 469     qc_exec_stack st;
 470     size_t p, parampos;
 471
 472     /* back up locals */
 473     st.localsp  = prog->localstack_count;
 474     st.stmt     = prog->statement;
 475     st.function = func;
 476
 477 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 478     if (prog->stack_count)
 479     {
 480         prog_section_function *cur;
 481         cur = prog->stack[prog->stack_count-1].function;
 482         if (cur)
 483         {
 484             qcint *globals = prog->globals + cur->firstlocal;
 485             if (!qc_program_localstack_append(prog, globals, cur->locals))
 486             {
 487                 printf("out of memory\n");
 488                 exit(1);
 489             }
 490         }
 491     }
 492 #else
 493     {
 494         qcint *globals = prog->globals + func->firstlocal;
 495         if (!qc_program_localstack_append(prog, globals, func->locals))
 496         {
 497             printf("out of memory\n");
 498             exit(1);
 499         }
 500     }
 501 #endif
 502
 503     /* copy parameters */
 504     parampos = func->firstlocal;
 505     for (p = 0; p < func->nargs; ++p)
 506     {
 507         size_t s;
 508         for (s = 0; s < func->argsize[p]; ++s) {
 509             prog->globals[parampos] = prog->globals[OFS_PARM0 + 3*p + s];
 510             ++parampos;
 511         }
 512     }
 513
 514     if (!qc_program_stack_add(prog, st)) {
 515         printf("out of memory\n");
 516         exit(1);
 517     }
 518
 519     return func->entry;
 520 }
 521
 522 static qcint prog_leavefunction(qc_program *prog)
 523 {
 524     prog_section_function *prev = NULL;
 525     size_t oldsp;
 526
 527     qc_exec_stack st = prog->stack[prog->stack_count-1];
 528
 529 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 530     if (prog->stack_count > 1) {
 531         prev  = prog->stack[prog->stack_count-2].function;
 532         oldsp = prog->stack[prog->stack_count-2].localsp;
 533     }
 534 #else
 535     prev  = prog->stack[prog->stack_count-1].function;
 536     oldsp = prog->stack[prog->stack_count-1].localsp;
 537 #endif
 538     if (prev) {
 539         qcint *globals = prog->globals + prev->firstlocal;
 540         memcpy(globals, prog->localstack + oldsp, prev->locals);
 541         if (!qc_program_localstack_resize(prog, oldsp)) {
 542             printf("out of memory\n");
 543             exit(1);
 544         }
 545     }
 546
 547     if (!qc_program_stack_remove(prog, prog->stack_count-1)) {
 548         printf("out of memory\n");
 549         exit(1);
 550     }
 551
 552     return st.stmt - 1; /* offset the ++st */
 553 }
 554
 555 bool prog_exec(qc_program *prog, prog_section_function *func, size_t flags, long maxjumps)
 556 {
 557     long jumpcount = 0;
 558     prog_section_statement *st;
 559
 560     prog->vmerror = 0;
 561
 562     st = prog->code + prog_enterfunction(prog, func);
 563     --st;
 564     switch (flags)
 565     {
 566         default:
 567         case 0:
 568         {
 569 #define QCVM_PROFILE 0
 570 #define QCVM_TRACE   0
 571 #           include "execloop.h"
 572             break;
 573         }
 574         case (VMXF_TRACE):
 575         {
 576 #define QCVM_PROFILE 0
 577 #define QCVM_TRACE   1
 578 #           include "execloop.h"
 579             break;
 580         }
 581         case (VMXF_PROFILE):
 582         {
 583 #define QCVM_PROFILE 1
 584 #define QCVM_TRACE   0
 585 #           include "execloop.h"
 586             break;
 587         }
 588         case (VMXF_TRACE|VMXF_PROFILE):
 589         {
 590 #define QCVM_PROFILE 1
 591 #define QCVM_TRACE   1
 592 #           include "execloop.h"
 593             break;
 594         }
 595     };
 596
 597 cleanup:
 598     prog->localstack_count = 0;
 599     prog->stack_count = 0;
 600     if (prog->vmerror)
 601         return false;
 602     return true;
 603 }
 604
 605 /***********************************************************************
 606  * main for when building the standalone executor
 607  */
 608
 609 #if defined(QCVM_EXECUTOR)
 610 const char *type_name[TYPE_COUNT] = {
 611     "void",
 612     "string",
 613     "float",
 614     "vector",
 615     "entity",
 616     "field",
 617     "function",
 618     "pointer",
 619 #if 0
 620     "integer",
 621 #endif
 622     "variant"
 623 };
 624
 625 bool        opts_debug    = false;
 626 bool        opts_memchk   = false;
 627
 628 #define CheckArgs(num) do {                                                    \
 629     if (prog->argc != (num)) {                                                 \
 630         prog->vmerror++;                                                       \
 631         printf("ERROR: invalid number of arguments for %s: %i, expected %i\n", \
 632         __FUNCTION__, prog->argc, (num));                                      \
 633         return -1;                                                             \
 634     }                                                                          \
 635 } while (0)
 636
 637 #define GetGlobal(idx) ((qcany*)(prog->globals + (idx)))
 638 #define GetArg(num) GetGlobal(OFS_PARM0 + 3*(num))
 639 #define Return(any) *(GetGlobal(OFS_RETURN)) = (any)
 640
 641 static int qc_print(qc_program *prog)
 642 {
 643     size_t i;
 644     for (i = 0; i < prog->argc; ++i) {
 645         qcany *str = (qcany*)(prog->globals + OFS_PARM0 + 3*i);
 646         printf("%s", prog_getstring(prog, str->string));
 647     }
 648     return 0;
 649 }
 650
 651 static int qc_ftos(qc_program *prog)
 652 {
 653     char buffer[512];
 654     qcany *num;
 655     qcany str;
 656     CheckArgs(1);
 657     num = GetArg(0);
 658     snprintf(buffer, sizeof(buffer), "%g", num->_float);
 659     str.string = prog_tempstring(prog, buffer);
 660     Return(str);
 661     return 0;
 662 }
 663
 664 static int qc_spawn(qc_program *prog)
 665 {
 666     qcany ent;
 667     CheckArgs(0);
 668     ent.edict = prog_spawn_entity(prog);
 669     Return(ent);
 670     return (ent.edict ? 0 : -1);
 671 }
 672
 673 static int qc_kill(qc_program *prog)
 674 {
 675     qcany *ent;
 676     CheckArgs(1);
 677     ent = GetArg(0);
 678     prog_free_entity(prog, ent->edict);
 679     return 0;
 680 }
 681
 682 static prog_builtin qc_builtins[] = {
 683     NULL,
 684     &qc_print,
 685     &qc_ftos,
 686     &qc_spawn,
 687     &qc_kill
 688 };
 689 static size_t qc_builtins_count = sizeof(qc_builtins) / sizeof(qc_builtins[0]);
 690
 691 static const char *arg0 = NULL;
 692
 693 void usage()
 694 {
 695     printf("usage: [-debug] %s file\n", arg0);
 696     exit(1);
 697 }
 698
 699 int main(int argc, char **argv)
 700 {
 701     size_t      i;
 702     qcint       fnmain = -1;
 703     qc_program *prog;
 704     size_t      xflags = VMXF_DEFAULT;
 705     bool        opts_printfields = false;
 706     bool        opts_printdefs   = false;
 707     bool        opts_info  = false;
 708
 709     arg0 = argv[0];
 710
 711     if (argc < 2)
 712         usage();
 713
 714     while (argc > 2) {
 715         if (!strcmp(argv[1], "-trace")) {
 716             --argc;
 717             ++argv;
 718             xflags |= VMXF_TRACE;
 719         }
 720         else if (!strcmp(argv[1], "-profile")) {
 721             --argc;
 722             ++argv;
 723             xflags |= VMXF_PROFILE;
 724         }
 725         else if (!strcmp(argv[1], "-info")) {
 726             --argc;
 727             ++argv;
 728             opts_info = true;
 729         }
 730         else if (!strcmp(argv[1], "-printdefs")) {
 731             --argc;
 732             ++argv;
 733             opts_printdefs = true;
 734         }
 735         else if (!strcmp(argv[1], "-printfields")) {
 736             --argc;
 737             ++argv;
 738             opts_printfields = true;
 739         }
 740         else
 741             usage();
 742     }
 743
 744
 745     prog = prog_load(argv[1]);
 746     if (!prog) {
 747         printf("failed to load program '%s'\n", argv[1]);
 748         exit(1);
 749     }
 750
 751     prog->builtins       = qc_builtins;
 752     prog->builtins_count = qc_builtins_count;
 753     prog->builtins_alloc = 0;
 754
 755     printf("Program's system-checksum = 0x%04x\n", (int)prog->crc16);
 756
 757     for (i = 1; i < prog->functions_count; ++i) {
 758         const char *name = prog_getstring(prog, prog->functions[i].name);
 759         /* printf("Found function: %s\n", name); */
 760         if (!strcmp(name, "main"))
 761             fnmain = (qcint)i;
 762     }
 763     printf("Entity field space: %i\n", (int)prog->entityfields);
 764     if (opts_info) {
 765         prog_delete(prog);
 766         return 0;
 767     }
 768     if (opts_printdefs) {
 769         for (i = 0; i < prog->defs_count; ++i) {
 770             printf("Global: %8s %-16s at %u\n",
 771                    type_name[prog->defs[i].type],
 772                    prog_getstring(prog, prog->defs[i].name),
 773                    (unsigned int)prog->defs[i].offset);
 774         }
 775     }
 776     else if (opts_printfields) {
 777         for (i = 0; i < prog->fields_count; ++i) {
 778             printf("Field: %8s %-16s at %u\n",
 779                    type_name[prog->fields[i].type],
 780                    prog_getstring(prog, prog->fields[i].name),
 781                    (unsigned int)prog->fields[i].offset);
 782         }
 783     }
 784     else
 785     {
 786         if (fnmain > 0)
 787         {
 788             prog_exec(prog, &prog->functions[fnmain], xflags, VM_JUMPS_DEFAULT);
 789         }
 790         else
 791             printf("No main function found\n");
 792     }
 793
 794     prog_delete(prog);
 795     return 0;
 796 }
 797 #endif