sqrt and normalize builtins
[xonotic/gmqcc.git] / 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 */