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     char  *data;
 222     size_t i;
 223     qcint  e;
 224     for (e = 0; e < (qcint)prog->entitypool_count; ++e) {
 225         if (!prog->entitypool[e]) {
 226             data = (char*)(prog->entitydata + (prog->entityfields * e));
 227             memset(data, 0, prog->entityfields * sizeof(qcint));
 228             return e;
 229         }
 230     }
 231     if (!qc_program_entitypool_add(prog, true)) {
 232         prog->vmerror++;
 233         printf("Failed to allocate entity\n");
 234         return 0;
 235     }
 236     prog->entities++;
 237     for (i = 0; i < prog->entityfields; ++i) {
 238         if (!qc_program_entitydata_add(prog, 0)) {
 239             printf("Failed to allocate entity\n");
 240             return 0;
 241         }
 242     }
 243     data = (char*)(prog->entitydata + (prog->entityfields * e));
 244     memset(data, 0, prog->entityfields * sizeof(qcint));
 245     return e;
 246 }
 247
 248 void prog_free_entity(qc_program *prog, qcint e)
 249 {
 250     if (!e) {
 251         prog->vmerror++;
 252         printf("Trying to free world entity\n");
 253         return;
 254     }
 255     if (e >= prog->entitypool_count) {
 256         prog->vmerror++;
 257         printf("Trying to free out of bounds entity\n");
 258         return;
 259     }
 260     if (!prog->entitypool[e]) {
 261         prog->vmerror++;
 262         printf("Double free on entity\n");
 263         return;
 264     }
 265     prog->entitypool[e] = false;
 266 }
 267
 268 qcint prog_tempstring(qc_program *prog, const char *_str)
 269 {
 270     /* we don't access it, but the macro-generated functions don't use
 271      * const
 272      */
 273     char *str = (char*)_str;
 274
 275     size_t len = strlen(str);
 276     size_t at = prog->tempstring_at;
 277
 278     /* when we reach the end we start over */
 279     if (at + len >= prog->strings_count)
 280         at = prog->tempstring_start;
 281
 282     /* when it doesn't fit, reallocate */
 283     if (at + len >= prog->strings_count)
 284     {
 285         prog->strings_count = at;
 286         if (!qc_program_strings_append(prog, str, len+1)) {
 287             prog->vmerror = VMERR_TEMPSTRING_ALLOC;
 288             return 0;
 289         }
 290         return at;
 291     }
 292
 293     /* when it fits, just copy */
 294     memcpy(prog->strings + at, str, len+1);
 295     prog->tempstring_at += len+1;
 296     return at;
 297 }
 298
 299 static int print_escaped_string(const char *str, size_t maxlen)
 300 {
 301     int len = 2;
 302     putchar('"');
 303     --maxlen; /* because we're lazy and have escape sequences */
 304     while (*str) {
 305         if (len >= maxlen) {
 306             putchar('.');
 307             putchar('.');
 308             putchar('.');
 309             len += 3;
 310             break;
 311         }
 312         switch (*str) {
 313             case '\a': len += 2; putchar('\\'); putchar('a'); break;
 314             case '\b': len += 2; putchar('\\'); putchar('b'); break;
 315             case '\r': len += 2; putchar('\\'); putchar('r'); break;
 316             case '\n': len += 2; putchar('\\'); putchar('n'); break;
 317             case '\t': len += 2; putchar('\\'); putchar('t'); break;
 318             case '\f': len += 2; putchar('\\'); putchar('f'); break;
 319             case '\v': len += 2; putchar('\\'); putchar('v'); break;
 320             case '\\': len += 2; putchar('\\'); putchar('\\'); break;
 321             case '"':  len += 2; putchar('\\'); putchar('"'); break;
 322             default:
 323                 ++len;
 324                 putchar(*str);
 325                 break;
 326         }
 327         ++str;
 328     }
 329     putchar('"');
 330     return len;
 331 }
 332
 333 static void trace_print_global(qc_program *prog, unsigned int glob, int vtype)
 334 {
 335     static char spaces[28+1] = "                            ";
 336     prog_section_def *def;
 337     qcany    *value;
 338     int       len;
 339
 340     if (!glob) {
 341         len = printf("<null>,");
 342         goto done;
 343     }
 344
 345     def = prog_getdef(prog, glob);
 346     value = (qcany*)(&prog->globals[glob]);
 347
 348     if (def) {
 349         const char *name = prog_getstring(prog, def->name);
 350         if (name[0] == '#')
 351             len = printf("$");
 352         else
 353             len = printf("%s ", name);
 354         vtype = def->type;
 355     }
 356     else
 357         len = printf("[@%u] ", glob);
 358
 359     switch (vtype) {
 360         case TYPE_VOID:
 361         case TYPE_ENTITY:
 362         case TYPE_FIELD:
 363         case TYPE_FUNCTION:
 364         case TYPE_POINTER:
 365             len += printf("(%i),", value->_int);
 366             break;
 367         case TYPE_VECTOR:
 368             len += printf("'%g %g %g',", value->vector[0],
 369                                          value->vector[1],
 370                                          value->vector[2]);
 371             break;
 372         case TYPE_STRING:
 373             len += print_escaped_string(prog_getstring(prog, value->string), sizeof(spaces)-len-5);
 374             len += printf(",");
 375             /* len += printf("\"%s\",", prog_getstring(prog, value->string)); */
 376             break;
 377         case TYPE_FLOAT:
 378         default:
 379             len += printf("%g,", value->_float);
 380             break;
 381     }
 382 done:
 383     if (len < sizeof(spaces)-1) {
 384         spaces[sizeof(spaces)-1-len] = 0;
 385         printf(spaces);
 386         spaces[sizeof(spaces)-1-len] = ' ';
 387     }
 388 }
 389
 390 static void prog_print_statement(qc_program *prog, prog_section_statement *st)
 391 {
 392     if (st->opcode >= (sizeof(asm_instr)/sizeof(asm_instr[0]))) {
 393         printf("<illegal instruction %d>\n", st->opcode);
 394         return;
 395     }
 396     printf(" <> %-12s", asm_instr[st->opcode].m);
 397     if (st->opcode >= INSTR_IF &&
 398         st->opcode <= INSTR_IFNOT)
 399     {
 400         trace_print_global(prog, st->o1.u1, TYPE_FLOAT);
 401         printf("%d\n", st->o2.s1);
 402     }
 403     else if (st->opcode >= INSTR_CALL0 &&
 404              st->opcode <= INSTR_CALL8)
 405     {
 406         printf("\n");
 407     }
 408     else if (st->opcode == INSTR_GOTO)
 409     {
 410         printf("%i\n", st->o1.s1);
 411     }
 412     else
 413     {
 414         int t[3] = { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT };
 415         switch (st->opcode)
 416         {
 417             case INSTR_MUL_FV:
 418                 t[1] = t[2] = TYPE_VECTOR;
 419                 break;
 420             case INSTR_MUL_VF:
 421                 t[0] = t[2] = TYPE_VECTOR;
 422                 break;
 423             case INSTR_MUL_V:
 424                 t[0] = t[1] = TYPE_VECTOR;
 425                 break;
 426             case INSTR_ADD_V:
 427             case INSTR_SUB_V:
 428             case INSTR_EQ_V:
 429             case INSTR_NE_V:
 430                 t[0] = t[1] = t[2] = TYPE_VECTOR;
 431                 break;
 432             case INSTR_EQ_S:
 433             case INSTR_NE_S:
 434                 t[0] = t[1] = TYPE_STRING;
 435                 break;
 436             case INSTR_STORE_F:
 437             case INSTR_STOREP_F:
 438                 t[2] = -1;
 439                 break;
 440             case INSTR_STORE_V:
 441                 t[0] = t[1] = TYPE_VECTOR; t[2] = -1;
 442                 break;
 443             case INSTR_STORE_S:
 444                 t[0] = t[1] = TYPE_STRING; t[2] = -1;
 445                 break;
 446             case INSTR_STORE_ENT:
 447                 t[0] = t[1] = TYPE_ENTITY; t[2] = -1;
 448                 break;
 449             case INSTR_STORE_FLD:
 450                 t[0] = t[1] = TYPE_FIELD; t[2] = -1;
 451                 break;
 452             case INSTR_STORE_FNC:
 453                 t[0] = t[1] = TYPE_FUNCTION; t[2] = -1;
 454                 break;
 455             case INSTR_STOREP_V:
 456                 t[0] = TYPE_VECTOR; t[1] = TYPE_ENTITY; t[2] = -1;
 457                 break;
 458             case INSTR_STOREP_S:
 459                 t[0] = TYPE_STRING; t[1] = TYPE_ENTITY; t[2] = -1;
 460                 break;
 461             case INSTR_STOREP_ENT:
 462                 t[0] = TYPE_ENTITY; t[1] = TYPE_ENTITY; t[2] = -1;
 463                 break;
 464             case INSTR_STOREP_FLD:
 465                 t[0] = TYPE_FIELD; t[1] = TYPE_ENTITY; t[2] = -1;
 466                 break;
 467             case INSTR_STOREP_FNC:
 468                 t[0] = TYPE_FUNCTION; t[1] = TYPE_ENTITY; t[2] = -1;
 469                 break;
 470         }
 471         if (t[0] >= 0) trace_print_global(prog, st->o1.u1, t[0]);
 472         else           printf("(none),          ");
 473         if (t[1] >= 0) trace_print_global(prog, st->o2.u1, t[1]);
 474         else           printf("(none),          ");
 475         if (t[2] >= 0) trace_print_global(prog, st->o3.u1, t[2]);
 476         else           printf("(none)");
 477         printf("\n");
 478     }
 479     fflush(stdout);
 480 }
 481
 482 static qcint prog_enterfunction(qc_program *prog, prog_section_function *func)
 483 {
 484     qc_exec_stack st;
 485     size_t p, parampos;
 486
 487     /* back up locals */
 488     st.localsp  = prog->localstack_count;
 489     st.stmt     = prog->statement;
 490     st.function = func;
 491
 492 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 493     if (prog->stack_count)
 494     {
 495         prog_section_function *cur;
 496         cur = prog->stack[prog->stack_count-1].function;
 497         if (cur)
 498         {
 499             qcint *globals = prog->globals + cur->firstlocal;
 500             if (!qc_program_localstack_append(prog, globals, cur->locals))
 501             {
 502                 printf("out of memory\n");
 503                 exit(1);
 504             }
 505         }
 506     }
 507 #else
 508     {
 509         qcint *globals = prog->globals + func->firstlocal;
 510         if (!qc_program_localstack_append(prog, globals, func->locals))
 511         {
 512             printf("out of memory\n");
 513             exit(1);
 514         }
 515     }
 516 #endif
 517
 518     /* copy parameters */
 519     parampos = func->firstlocal;
 520     for (p = 0; p < func->nargs; ++p)
 521     {
 522         size_t s;
 523         for (s = 0; s < func->argsize[p]; ++s) {
 524             prog->globals[parampos] = prog->globals[OFS_PARM0 + 3*p + s];
 525             ++parampos;
 526         }
 527     }
 528
 529     if (!qc_program_stack_add(prog, st)) {
 530         printf("out of memory\n");
 531         exit(1);
 532     }
 533
 534     return func->entry;
 535 }
 536
 537 static qcint prog_leavefunction(qc_program *prog)
 538 {
 539     prog_section_function *prev = NULL;
 540     size_t oldsp;
 541
 542     qc_exec_stack st = prog->stack[prog->stack_count-1];
 543
 544 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 545     if (prog->stack_count > 1) {
 546         prev  = prog->stack[prog->stack_count-2].function;
 547         oldsp = prog->stack[prog->stack_count-2].localsp;
 548     }
 549 #else
 550     prev  = prog->stack[prog->stack_count-1].function;
 551     oldsp = prog->stack[prog->stack_count-1].localsp;
 552 #endif
 553     if (prev) {
 554         qcint *globals = prog->globals + prev->firstlocal;
 555         memcpy(globals, prog->localstack + oldsp, prev->locals);
 556         if (!qc_program_localstack_resize(prog, oldsp)) {
 557             printf("out of memory\n");
 558             exit(1);
 559         }
 560     }
 561
 562     if (!qc_program_stack_remove(prog, prog->stack_count-1)) {
 563         printf("out of memory\n");
 564         exit(1);
 565     }
 566
 567     return st.stmt - 1; /* offset the ++st */
 568 }
 569
 570 bool prog_exec(qc_program *prog, prog_section_function *func, size_t flags, long maxjumps)
 571 {
 572     long jumpcount = 0;
 573     size_t oldxflags = prog->xflags;
 574     prog_section_statement *st;
 575
 576     prog->vmerror = 0;
 577     prog->xflags = flags;
 578
 579     st = prog->code + prog_enterfunction(prog, func);
 580     --st;
 581     switch (flags)
 582     {
 583         default:
 584         case 0:
 585         {
 586 #define QCVM_PROFILE 0
 587 #define QCVM_TRACE   0
 588 #           include "execloop.h"
 589             break;
 590         }
 591         case (VMXF_TRACE):
 592         {
 593 #define QCVM_PROFILE 0
 594 #define QCVM_TRACE   1
 595 #           include "execloop.h"
 596             break;
 597         }
 598         case (VMXF_PROFILE):
 599         {
 600 #define QCVM_PROFILE 1
 601 #define QCVM_TRACE   0
 602 #           include "execloop.h"
 603             break;
 604         }
 605         case (VMXF_TRACE|VMXF_PROFILE):
 606         {
 607 #define QCVM_PROFILE 1
 608 #define QCVM_TRACE   1
 609 #           include "execloop.h"
 610             break;
 611         }
 612     };
 613
 614 cleanup:
 615     prog->xflags = oldxflags;
 616     prog->localstack_count = 0;
 617     prog->stack_count = 0;
 618     if (prog->vmerror)
 619         return false;
 620     return true;
 621 }
 622
 623 /***********************************************************************
 624  * main for when building the standalone executor
 625  */
 626
 627 #if defined(QCVM_EXECUTOR)
 628 #include <math.h>
 629
 630 const char *type_name[TYPE_COUNT] = {
 631     "void",
 632     "string",
 633     "float",
 634     "vector",
 635     "entity",
 636     "field",
 637     "function",
 638     "pointer",
 639 #if 0
 640     "integer",
 641 #endif
 642     "variant"
 643 };
 644
 645 bool        opts_debug    = false;
 646 bool        opts_memchk   = false;
 647
 648 #define CheckArgs(num) do {                                                    \
 649     if (prog->argc != (num)) {                                                 \
 650         prog->vmerror++;                                                       \
 651         printf("ERROR: invalid number of arguments for %s: %i, expected %i\n", \
 652         __FUNCTION__, prog->argc, (num));                                      \
 653         return -1;                                                             \
 654     }                                                                          \
 655 } while (0)
 656
 657 #define GetGlobal(idx) ((qcany*)(prog->globals + (idx)))
 658 #define GetArg(num) GetGlobal(OFS_PARM0 + 3*(num))
 659 #define Return(any) *(GetGlobal(OFS_RETURN)) = (any)
 660
 661 static int qc_print(qc_program *prog)
 662 {
 663     size_t i;
 664     const char *laststr = NULL;
 665     for (i = 0; i < prog->argc; ++i) {
 666         qcany *str = (qcany*)(prog->globals + OFS_PARM0 + 3*i);
 667         printf("%s", (laststr = prog_getstring(prog, str->string)));
 668     }
 669     if (laststr && (prog->xflags & VMXF_TRACE)) {
 670         size_t len = strlen(laststr);
 671         if (!len || laststr[len-1] != '\n')
 672             printf("\n");
 673     }
 674     return 0;
 675 }
 676
 677 static int qc_error(qc_program *prog)
 678 {
 679     printf("*** VM raised an error:\n");
 680     qc_print(prog);
 681     prog->vmerror++;
 682     return -1;
 683 }
 684
 685 static int qc_ftos(qc_program *prog)
 686 {
 687     char buffer[512];
 688     qcany *num;
 689     qcany str;
 690     CheckArgs(1);
 691     num = GetArg(0);
 692     snprintf(buffer, sizeof(buffer), "%g", num->_float);
 693     str.string = prog_tempstring(prog, buffer);
 694     Return(str);
 695     return 0;
 696 }
 697
 698 static int qc_vtos(qc_program *prog)
 699 {
 700     char buffer[512];
 701     qcany *num;
 702     qcany str;
 703     CheckArgs(1);
 704     num = GetArg(0);
 705     snprintf(buffer, sizeof(buffer), "'%g %g %g'", num->vector[0], num->vector[1], num->vector[2]);
 706     str.string = prog_tempstring(prog, buffer);
 707     Return(str);
 708     return 0;
 709 }
 710
 711 static int qc_spawn(qc_program *prog)
 712 {
 713     qcany ent;
 714     CheckArgs(0);
 715     ent.edict = prog_spawn_entity(prog);
 716     Return(ent);
 717     return (ent.edict ? 0 : -1);
 718 }
 719
 720 static int qc_kill(qc_program *prog)
 721 {
 722     qcany *ent;
 723     CheckArgs(1);
 724     ent = GetArg(0);
 725     prog_free_entity(prog, ent->edict);
 726     return 0;
 727 }
 728
 729 static int qc_vlen(qc_program *prog)
 730 {
 731     qcany *vec, len;
 732     CheckArgs(1);
 733     vec = GetArg(0);
 734     len._float = sqrt(vec->vector[0] * vec->vector[0] +
 735                       vec->vector[1] * vec->vector[1] +
 736                       vec->vector[2] * vec->vector[2]);
 737     Return(len);
 738     return 0;
 739 }
 740
 741 static prog_builtin qc_builtins[] = {
 742     NULL,
 743     &qc_print, /*   1   */
 744     &qc_ftos,  /*   2   */
 745     &qc_spawn, /*   3   */
 746     &qc_kill,  /*   4   */
 747     &qc_vtos,  /*   5   */
 748     &qc_error, /*   6   */
 749     &qc_vlen   /*   7   */
 750 };
 751 static size_t qc_builtins_count = sizeof(qc_builtins) / sizeof(qc_builtins[0]);
 752
 753 static const char *arg0 = NULL;
 754
 755 void usage()
 756 {
 757     printf("usage: [-debug] %s file\n", arg0);
 758     exit(1);
 759 }
 760
 761 int main(int argc, char **argv)
 762 {
 763     size_t      i;
 764     qcint       fnmain = -1;
 765     qc_program *prog;
 766     size_t      xflags = VMXF_DEFAULT;
 767     bool        opts_printfields = false;
 768     bool        opts_printdefs   = false;
 769     bool        opts_info  = false;
 770
 771     arg0 = argv[0];
 772
 773     if (argc < 2)
 774         usage();
 775
 776     while (argc > 2) {
 777         if (!strcmp(argv[1], "-trace")) {
 778             --argc;
 779             ++argv;
 780             xflags |= VMXF_TRACE;
 781         }
 782         else if (!strcmp(argv[1], "-profile")) {
 783             --argc;
 784             ++argv;
 785             xflags |= VMXF_PROFILE;
 786         }
 787         else if (!strcmp(argv[1], "-info")) {
 788             --argc;
 789             ++argv;
 790             opts_info = true;
 791         }
 792         else if (!strcmp(argv[1], "-printdefs")) {
 793             --argc;
 794             ++argv;
 795             opts_printdefs = true;
 796         }
 797         else if (!strcmp(argv[1], "-printfields")) {
 798             --argc;
 799             ++argv;
 800             opts_printfields = true;
 801         }
 802         else
 803             usage();
 804     }
 805
 806
 807     prog = prog_load(argv[1]);
 808     if (!prog) {
 809         printf("failed to load program '%s'\n", argv[1]);
 810         exit(1);
 811     }
 812
 813     prog->builtins       = qc_builtins;
 814     prog->builtins_count = qc_builtins_count;
 815     prog->builtins_alloc = 0;
 816
 817     printf("Program's system-checksum = 0x%04x\n", (int)prog->crc16);
 818
 819     for (i = 1; i < prog->functions_count; ++i) {
 820         const char *name = prog_getstring(prog, prog->functions[i].name);
 821         /* printf("Found function: %s\n", name); */
 822         if (!strcmp(name, "main"))
 823             fnmain = (qcint)i;
 824     }
 825     printf("Entity field space: %i\n", (int)prog->entityfields);
 826     if (opts_info) {
 827         prog_delete(prog);
 828         return 0;
 829     }
 830     if (opts_printdefs) {
 831         for (i = 0; i < prog->defs_count; ++i) {
 832             printf("Global: %8s %-16s at %u\n",
 833                    type_name[prog->defs[i].type],
 834                    prog_getstring(prog, prog->defs[i].name),
 835                    (unsigned int)prog->defs[i].offset);
 836         }
 837     }
 838     else if (opts_printfields) {
 839         for (i = 0; i < prog->fields_count; ++i) {
 840             printf("Field: %8s %-16s at %u\n",
 841                    type_name[prog->fields[i].type],
 842                    prog_getstring(prog, prog->fields[i].name),
 843                    (unsigned int)prog->fields[i].offset);
 844         }
 845     }
 846     else
 847     {
 848         if (fnmain > 0)
 849         {
 850             prog_exec(prog, &prog->functions[fnmain], xflags, VM_JUMPS_DEFAULT);
 851         }
 852         else
 853             printf("No main function found\n");
 854     }
 855
 856     prog_delete(prog);
 857     return 0;
 858 }
 859 #endif