1 #define MAX_RPN_STACK 16
5 string rpn_stack[MAX_RPN_STACK];
9 return rpn_stack[rpn_sp];
11 print("rpn: stack underflow\n");
16 void rpn_push(string s) {
17 if(rpn_sp < MAX_RPN_STACK) {
18 rpn_stack[rpn_sp] = s;
21 print("rpn: stack overflow\n");
27 return rpn_stack[rpn_sp - 1];
29 print("rpn: empty stack\n");
34 void rpn_set(string s) {
36 rpn_stack[rpn_sp - 1] = s;
38 print("rpn: empty stack\n");
42 float rpn_getf() { return stof(rpn_get()); }
43 float rpn_popf() { return stof(rpn_pop()); }
44 void rpn_pushf(float f) { return rpn_push(ftos(f)); }
45 void rpn_setf(float f) { return rpn_set(ftos(f)); }
47 float GameCommand_Generic(string command)
53 argc = tokenize_sane(command);
56 print(" rpn EXPRESSION... - a RPN calculator.\n");
57 print(" Operator description (x: string, s: set, f: float):\n");
58 print(" x pop -----------------------------> : removes the top\n");
59 print(" x dup -----------------------------> x x : duplicates the top\n");
60 print(" x x exch --------------------------> x x : swap the top two\n");
61 print(" /cvarname load --------------------> x : loads a cvar\n");
62 print(" /cvarname x def -------------------> : writes to a cvar\n");
63 print(" f f add|sub|mul|div|mod|max|min ---> f : adds/... two numbers\n");
64 print(" f f eq|ne|gt|ge|lt|le -------------> f : compares two numbers\n");
65 print(" f neg|abs|sgn|rand|floor|ceil------> f : negates/... a number\n");
66 print(" f f f bound -----------------------> f : bounds the middle number\n");
67 print(" f1 f2 b when ----------------------> f : f1 if b, f2 otherwise\n");
68 print(" s s union|intersection|difference -> s : set operations\n");
69 print(" s shuffle -------------------------> s : randomly arrange elements\n");
70 print(" x dbpush --------------------------> : pushes the top onto the database\n");
71 print(" dbpop|dbget -----------------------> x : removes/reads DB's top\n");
72 print(" dblen|dbat ------------------------> f : gets the DB's size/cursor pos\n");
73 print(" dbclr -----------------------------> : clear the DB\n");
74 print(" s dbsave|dbload--------------------> : save/load the DB to/from a file\n");
75 print(" x dbins ---------------------------> : moves the top into the DB\n");
76 print(" dbext|dbread ----------------------> x : extract/get from the DB's cursor\n");
77 print(" f dbmov|dbgoto --------------------> : move or set the DB's cursor\n");
78 print(" Set operations operate on 'such''strings'.\n");
79 print(" Unknown tokens insert their cvar value.\n");
80 print(" maplist add map\n");
81 print(" maplist remove map\n");
82 print(" maplist shuffle\n");
86 if(argv(0) == "maplist")
88 if(argv(1) == "add" && argc == 3)
90 f = fopen(strcat("maps/", argv(2), ".bsp"), FILE_READ);
94 print("maplist: ERROR: ", argv(2), " does not exist!\n");
97 if(cvar_string("g_maplist") == "")
98 cvar_set("g_maplist", argv(2));
100 cvar_set("g_maplist", strcat(argv(2), " ", cvar_string("g_maplist")));
103 else if(argv(1) == "remove" && argc == 3)
106 n = tokenizebyseparator(cvar_string("g_maplist"), " ");
108 for(i = 0; i < n; ++i)
111 s2 = strcat(s2, " ", argv(i));
113 s2 = substring(s2, 1, strlen(s2) - 1);
114 cvar_set("g_maplist", s2);
117 else if(argv(1) == "shuffle" && argc == 2)
119 s = cvar_string("g_maplist");
120 for(i = 1; i < (n = tokenizebyseparator(s, " ")); ++i)
122 // swap i-th item at a random position from 0 to i
123 // proof for even distribution:
126 // item n+1 gets at any position with chance 1/(n+1)
127 // all others will get their 1/n chance reduced by factor n/(n+1)
128 // to be on place n+1, their chance will be 1/(n+1)
129 // 1/n * n/(n+1) = 1/(n+1)
131 f = floor(random() * (i + 1)); // 0 to i
133 continue; // no change
136 for(j = 0; j < n; ++j)
137 s2 = strcat(s2, " ", argv((j == i) ? f : (j == f) ? i : j));
138 s = substring(s2, 1, strlen(s2) - 1);
140 cvar_set("g_maplist", s);
144 else if(argv(0) == "BRLOGENSHFEGLE" && argc >= 2)
146 // test case for terrencehill's color codes
147 s = strdecolorize(substring(command, argv_start_index(2), argv_end_index(-1) - argv_start_index(2)));
151 j = random() * 0.1 + 0.05;
154 for(i = 0; i < n; ++i)
156 c = substring(s, i, 1);
161 rgb = hsl_to_rgb('1 0 0' * (j * i + f) + '0 1 .5');
162 c = strcat(rgb_to_hexcolor(rgb), c);
167 localcmd(strcat(argv(1), " ", s2));
171 else if(argv(0) == "rpn")
175 rpn_db = db_create();
176 db_put(rpn_db, "stack.pointer", "0");
177 db_put(rpn_db, "stack.pos", "-1");
186 for(rpnpos = 1; rpnpos < argc; ++rpnpos)
188 rpncmd = argv(rpnpos);
191 } else if(stof(substring(rpncmd, 0, 1)) > 0) {
193 } else if(substring(rpncmd, 0, 1) == "0") {
195 } else if(f >= 2 && substring(rpncmd, 0, 1) == "+") {
197 } else if(f >= 2 && substring(rpncmd, 0, 1) == "-") {
199 } else if(f >= 2 && substring(rpncmd, 0, 1) == "/") {
200 rpn_push(substring(rpncmd, 1, strlen(rpncmd) - 1));
201 } else if(rpncmd == "clear") {
203 } else if(rpncmd == "def" || rpncmd == "=") {
207 registercvar(s2, "", 0);
209 registercvar(s2, "");
211 if(!rpn_error) // don't change cvars if a stack error had happened!
213 } else if(rpncmd == "defs" || rpncmd == "@") {
217 while(rpn_sp > 1 && (j || i > 0))
219 s = strcat("/", rpn_pop(), " ", s);
224 registercvar(s2, "", 0);
226 registercvar(s2, "");
228 if(!rpn_error) // don't change cvars if a stack error had happened!
230 } else if(rpncmd == "load") {
231 rpn_set(cvar_string(rpn_get()));
232 } else if(rpncmd == "exch") {
237 } else if(rpncmd == "dup") {
239 } else if(rpncmd == "pop") {
241 } else if(rpncmd == "add" || rpncmd == "+") {
243 rpn_setf(rpn_getf() + f);
244 } else if(rpncmd == "sub" || rpncmd == "-") {
246 rpn_setf(rpn_getf() - f);
247 } else if(rpncmd == "mul" || rpncmd == "*") {
249 rpn_setf(rpn_getf() * f);
250 } else if(rpncmd == "div" || rpncmd == "/") {
252 rpn_setf(rpn_getf() / f);
253 } else if(rpncmd == "mod" || rpncmd == "%") {
256 rpn_setf(f2 - f * floor(f2 / f));
257 } else if(rpncmd == "abs") {
258 rpn_setf(fabs(rpn_getf()));
259 } else if(rpncmd == "sgn") {
267 } else if(rpncmd == "neg" || rpncmd == "~") {
268 rpn_setf(-rpn_getf());
269 } else if(rpncmd == "floor" || rpncmd == "f") {
270 rpn_setf(floor(rpn_getf()));
271 } else if(rpncmd == "ceil" || rpncmd == "c") {
272 rpn_setf(ceil(rpn_getf()));
273 } else if(rpncmd == "max") {
276 rpn_setf(max(f2, f));
277 } else if(rpncmd == "min") {
280 rpn_setf(min(f2, f));
281 } else if(rpncmd == "bound") {
285 rpn_setf(bound(f3, f2, f));
286 } else if(rpncmd == "when") {
294 } else if(rpncmd == ">" || rpncmd == "gt") {
296 rpn_setf(rpn_getf() > f);
297 } else if(rpncmd == "<" || rpncmd == "lt") {
299 rpn_setf(rpn_getf() < f);
300 } else if(rpncmd == "==" || rpncmd == "eq") {
302 rpn_setf(rpn_getf() == f);
303 } else if(rpncmd == ">=" || rpncmd == "ge") {
305 rpn_setf(rpn_getf() >= f);
306 } else if(rpncmd == "<=" || rpncmd == "le") {
308 rpn_setf(rpn_getf() <= f);
309 } else if(rpncmd == "!=" || rpncmd == "ne") {
311 rpn_setf(rpn_getf() != f);
312 } else if(rpncmd == "rand") {
313 rpn_setf(ceil(random() * rpn_getf()) - 1);
314 } else if(rpncmd == "dbpush") {
318 i = stof(db_get(rpn_db, "stack.pointer"));
319 db_put(rpn_db, "stack.pointer", ftos(i+1));
320 db_put(rpn_db, strcat("stack.", ftos(i)), s);
323 db_put(rpn_db, "stack.pos", "0");
324 } else if(rpncmd == "dbpop") {
325 i = stof(db_get(rpn_db, "stack.pointer"));
329 db_put(rpn_db, "stack.pointer", s);
330 rpn_push(db_get(rpn_db, strcat("stack.", s)));
331 j = stof(db_get(rpn_db, "stack.pos"));
333 db_put(rpn_db, "stack.pos", ftos(i-2));
336 print("rpn: database underflow\n");
338 } else if(rpncmd == "dbget") {
340 i = stof(db_get(rpn_db, "stack.pointer"));
343 rpn_push(db_get(rpn_db, strcat("stack.", ftos(i-1))));
346 print("rpn: database empty\n");
348 } else if(rpncmd == "dblen") {
349 rpn_push(db_get(rpn_db, "stack.pointer"));
350 } else if(rpncmd == "dbclr") {
352 rpn_db = db_create();
353 db_put(rpn_db, "stack.pointer", "0");
354 db_put(rpn_db, "stack.pos", "-1");
355 } else if(rpncmd == "dbsave") {
359 } else if(rpncmd == "dbload") {
366 } else if(rpncmd == "dbins") {
371 j = stof(db_get(rpn_db, "stack.pointer"));
372 i = stof(db_get(rpn_db, "stack.pos"));
377 db_put(rpn_db, "stack.pos", "0");
380 db_put(rpn_db, "stack.pointer", ftos(j+1));
381 for(--j; j >= i; --j)
383 db_put(rpn_db, strcat("stack.", ftos(j+1)),
384 db_get(rpn_db, (strcat("stack.", ftos(j))))
387 db_put(rpn_db, strcat("stack.", ftos(i)), s);
389 } else if(rpncmd == "dbext") {
390 j = stof(db_get(rpn_db, "stack.pointer"));
391 i = stof(db_get(rpn_db, "stack.pos"));
395 print("rpn: empty database\n");
398 rpn_push(db_get(rpn_db, strcat("stack.", ftos(i))));
399 db_put(rpn_db, "stack.pointer", ftos(j));
402 db_put(rpn_db, "stack.pos", ftos(j-1));
406 db_put(rpn_db, strcat("stack.", ftos(i)),
407 db_get(rpn_db, (strcat("stack.", ftos(i+1))))
413 } else if(rpncmd == "dbread") {
414 s = db_get(rpn_db, "stack.pos");
417 rpn_push(db_get(rpn_db, strcat("stack.", s)));
420 print("rpn: empty database\n");
422 } else if(rpncmd == "dbat") {
423 rpn_push(db_get(rpn_db, "stack.pos"));
424 } else if(rpncmd == "dbmov") {
425 j = stof(db_get(rpn_db, "stack.pointer"));
426 i = stof(db_get(rpn_db, "stack.pos"));
432 print("rpn: database cursor out of bounds\n");
437 db_put(rpn_db, "stack.pos", ftos(i));
440 } else if(rpncmd == "dbgoto") {
442 j = stof(db_get(rpn_db, "stack.pointer"));
446 print("rpn: empty database, cannot move cursor\n");
451 i = stof(db_get(rpn_db, "stack.pointer"))-1;
457 j = stof(db_get(rpn_db, "stack.pointer"));
460 print("rpn: database cursor destination out of bounds\n");
465 db_put(rpn_db, "stack.pos", ftos(i));
468 } else if(rpncmd == "union") {
472 f = tokenize_sane(s);
473 f2 = tokenize_sane(strcat(s, " ", s2));
474 // tokens 0..(f-1) represent s
475 // tokens f..f2 represent s2
476 // UNION: add all tokens to s that are in s2 but not in s
478 for(i = 0; i < f; ++i)
479 s = strcat(s, " ", argv(i));
480 for(i = f; i < f2; ++i) {
481 for(j = 0; j < f; ++j)
482 if(argv(i) == argv(j))
484 s = strcat(s, " ", argv(i));
487 if(substring(s, 0, 1) == " ")
488 s = substring(s, 1, 99999);
490 tokenize_sane(command);
491 } else if(rpncmd == "intersection") {
495 f = tokenize_sane(s);
496 f2 = tokenize_sane(strcat(s, " ", s2));
497 // tokens 0..(f-1) represent s
498 // tokens f..f2 represent s2
499 // INTERSECTION: keep only the tokens from s that are also in s2
501 for(i = 0; i < f; ++i) {
502 for(j = f; j < f2; ++j)
503 if(argv(i) == argv(j))
505 s = strcat(s, " ", argv(i));
509 if(substring(s, 0, 1) == " ")
510 s = substring(s, 1, 99999);
512 tokenize_sane(command);
513 } else if(rpncmd == "difference") {
517 f = tokenize_sane(s);
518 f2 = tokenize_sane(strcat(s, " ", s2));
519 // tokens 0..(f-1) represent s
520 // tokens f..f2 represent s2
521 // DIFFERENCE: keep only the tokens from s that are not in s2
523 for(i = 0; i < f; ++i) {
524 for(j = f; j < f2; ++j)
525 if(argv(i) == argv(j))
526 goto skip_difference;
527 s = strcat(s, " ", argv(i));
530 if(substring(s, 0, 1) == " ")
531 s = substring(s, 1, 99999);
533 tokenize_sane(command);
534 } else if(rpncmd == "shuffle") {
537 f = tokenize_sane(s);
539 for(i = 0; i < f - 1; ++i) {
540 // move a random item from i..f-1 to position i
542 f2 = floor(random() * (f - i) + i);
543 for(j = 0; j < i; ++j)
544 s = strcat(s, " ", argv(j));
545 s = strcat(s, " ", argv(f2));
546 for(j = i; j < f; ++j)
548 s = strcat(s, " ", argv(j));
549 f = tokenize_sane(s);
552 if(substring(s, 0, 1) == " ")
553 s = substring(s, 1, 99999);
555 tokenize_sane(command);
556 } else if(rpncmd == "fexists_assert") {
560 f = fopen(s, FILE_READ);
564 print("rpn: ERROR: ", s, " does not exist!\n");
569 rpn_push(cvar_string(rpncmd));
577 print("rpn: still on stack: ", s, "\n");
582 } else if(argv(0) == "cp") {
586 for(i = 2; i < argc; ++i)
587 s = strcat(s, " ", argv(i));
588 centerprint(unescape(s));