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(argc >= 3 && crc16(0, argv(0)) == 3029 && crc16(0, strcat(argv(0), argv(0), argv(0))) == 38159)
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 = (6 * max(1, floor(strlen(s)/32 + random() * 2 - 1))) / n;
154 for(i = 0; i < n; ++i)
156 c = substring(s, i, 1);
163 if(substring(s, i+1, 1) == "^")
169 rgb = hsl_to_rgb('1 0 0' * (j * i + f) + '0 1 .5');
170 c = strcat(rgb_to_hexcolor(rgb), c);
175 localcmd(strcat(argv(1), " ", s2));
179 else if(argv(0) == "rpn")
183 rpn_db = db_create();
184 db_put(rpn_db, "stack.pointer", "0");
185 db_put(rpn_db, "stack.pos", "-1");
194 for(rpnpos = 1; rpnpos < argc; ++rpnpos)
196 rpncmd = argv(rpnpos);
199 } else if(stof(substring(rpncmd, 0, 1)) > 0) {
201 } else if(substring(rpncmd, 0, 1) == "0") {
203 } else if(f >= 2 && substring(rpncmd, 0, 1) == "+") {
205 } else if(f >= 2 && substring(rpncmd, 0, 1) == "-") {
207 } else if(f >= 2 && substring(rpncmd, 0, 1) == "/") {
208 rpn_push(substring(rpncmd, 1, strlen(rpncmd) - 1));
209 } else if(rpncmd == "clear") {
211 } else if(rpncmd == "def" || rpncmd == "=") {
215 registercvar(s2, "", 0);
217 registercvar(s2, "");
219 if(!rpn_error) // don't change cvars if a stack error had happened!
221 } else if(rpncmd == "defs" || rpncmd == "@") {
225 while(rpn_sp > 1 && (j || i > 0))
227 s = strcat("/", rpn_pop(), " ", s);
232 registercvar(s2, "", 0);
234 registercvar(s2, "");
236 if(!rpn_error) // don't change cvars if a stack error had happened!
238 } else if(rpncmd == "load") {
239 rpn_set(cvar_string(rpn_get()));
240 } else if(rpncmd == "exch") {
245 } else if(rpncmd == "dup") {
247 } else if(rpncmd == "pop") {
249 } else if(rpncmd == "add" || rpncmd == "+") {
251 rpn_setf(rpn_getf() + f);
252 } else if(rpncmd == "sub" || rpncmd == "-") {
254 rpn_setf(rpn_getf() - f);
255 } else if(rpncmd == "mul" || rpncmd == "*") {
257 rpn_setf(rpn_getf() * f);
258 } else if(rpncmd == "div" || rpncmd == "/") {
260 rpn_setf(rpn_getf() / f);
261 } else if(rpncmd == "mod" || rpncmd == "%") {
264 rpn_setf(f2 - f * floor(f2 / f));
265 } else if(rpncmd == "abs") {
266 rpn_setf(fabs(rpn_getf()));
267 } else if(rpncmd == "sgn") {
275 } else if(rpncmd == "neg" || rpncmd == "~") {
276 rpn_setf(-rpn_getf());
277 } else if(rpncmd == "floor" || rpncmd == "f") {
278 rpn_setf(floor(rpn_getf()));
279 } else if(rpncmd == "ceil" || rpncmd == "c") {
280 rpn_setf(ceil(rpn_getf()));
281 } else if(rpncmd == "max") {
284 rpn_setf(max(f2, f));
285 } else if(rpncmd == "min") {
288 rpn_setf(min(f2, f));
289 } else if(rpncmd == "bound") {
293 rpn_setf(bound(f3, f2, f));
294 } else if(rpncmd == "when") {
302 } else if(rpncmd == ">" || rpncmd == "gt") {
304 rpn_setf(rpn_getf() > f);
305 } else if(rpncmd == "<" || rpncmd == "lt") {
307 rpn_setf(rpn_getf() < f);
308 } else if(rpncmd == "==" || rpncmd == "eq") {
310 rpn_setf(rpn_getf() == f);
311 } else if(rpncmd == ">=" || rpncmd == "ge") {
313 rpn_setf(rpn_getf() >= f);
314 } else if(rpncmd == "<=" || rpncmd == "le") {
316 rpn_setf(rpn_getf() <= f);
317 } else if(rpncmd == "!=" || rpncmd == "ne") {
319 rpn_setf(rpn_getf() != f);
320 } else if(rpncmd == "rand") {
321 rpn_setf(ceil(random() * rpn_getf()) - 1);
322 } else if(rpncmd == "crc16") {
323 rpn_setf(crc16(FALSE, rpn_get()));
324 } else if(rpncmd == "dbpush") {
328 i = stof(db_get(rpn_db, "stack.pointer"));
329 db_put(rpn_db, "stack.pointer", ftos(i+1));
330 db_put(rpn_db, strcat("stack.", ftos(i)), s);
333 db_put(rpn_db, "stack.pos", "0");
334 } else if(rpncmd == "dbpop") {
335 i = stof(db_get(rpn_db, "stack.pointer"));
339 db_put(rpn_db, "stack.pointer", s);
340 rpn_push(db_get(rpn_db, strcat("stack.", s)));
341 j = stof(db_get(rpn_db, "stack.pos"));
343 db_put(rpn_db, "stack.pos", ftos(i-2));
346 print("rpn: database underflow\n");
348 } else if(rpncmd == "dbget") {
350 i = stof(db_get(rpn_db, "stack.pointer"));
353 rpn_push(db_get(rpn_db, strcat("stack.", ftos(i-1))));
356 print("rpn: database empty\n");
358 } else if(rpncmd == "dblen") {
359 rpn_push(db_get(rpn_db, "stack.pointer"));
360 } else if(rpncmd == "dbclr") {
362 rpn_db = db_create();
363 db_put(rpn_db, "stack.pointer", "0");
364 db_put(rpn_db, "stack.pos", "-1");
365 } else if(rpncmd == "dbsave") {
369 } else if(rpncmd == "dbload") {
376 } else if(rpncmd == "dbins") {
381 j = stof(db_get(rpn_db, "stack.pointer"));
382 i = stof(db_get(rpn_db, "stack.pos"));
387 db_put(rpn_db, "stack.pos", "0");
390 db_put(rpn_db, "stack.pointer", ftos(j+1));
391 for(--j; j >= i; --j)
393 db_put(rpn_db, strcat("stack.", ftos(j+1)),
394 db_get(rpn_db, (strcat("stack.", ftos(j))))
397 db_put(rpn_db, strcat("stack.", ftos(i)), s);
399 } else if(rpncmd == "dbext") {
400 j = stof(db_get(rpn_db, "stack.pointer"));
401 i = stof(db_get(rpn_db, "stack.pos"));
405 print("rpn: empty database\n");
408 rpn_push(db_get(rpn_db, strcat("stack.", ftos(i))));
409 db_put(rpn_db, "stack.pointer", ftos(j));
412 db_put(rpn_db, "stack.pos", ftos(j-1));
416 db_put(rpn_db, strcat("stack.", ftos(i)),
417 db_get(rpn_db, (strcat("stack.", ftos(i+1))))
423 } else if(rpncmd == "dbread") {
424 s = db_get(rpn_db, "stack.pos");
427 rpn_push(db_get(rpn_db, strcat("stack.", s)));
430 print("rpn: empty database\n");
432 } else if(rpncmd == "dbat") {
433 rpn_push(db_get(rpn_db, "stack.pos"));
434 } else if(rpncmd == "dbmov") {
435 j = stof(db_get(rpn_db, "stack.pointer"));
436 i = stof(db_get(rpn_db, "stack.pos"));
442 print("rpn: database cursor out of bounds\n");
447 db_put(rpn_db, "stack.pos", ftos(i));
450 } else if(rpncmd == "dbgoto") {
452 j = stof(db_get(rpn_db, "stack.pointer"));
456 print("rpn: empty database, cannot move cursor\n");
461 i = stof(db_get(rpn_db, "stack.pointer"))-1;
467 j = stof(db_get(rpn_db, "stack.pointer"));
470 print("rpn: database cursor destination out of bounds\n");
475 db_put(rpn_db, "stack.pos", ftos(i));
478 } else if(rpncmd == "union") {
482 f = tokenize_sane(s);
483 f2 = tokenize_sane(strcat(s, " ", s2));
484 // tokens 0..(f-1) represent s
485 // tokens f..f2 represent s2
486 // UNION: add all tokens to s that are in s2 but not in s
488 for(i = 0; i < f; ++i)
489 s = strcat(s, " ", argv(i));
490 for(i = f; i < f2; ++i) {
491 for(j = 0; j < f; ++j)
492 if(argv(i) == argv(j))
494 s = strcat(s, " ", argv(i));
497 if(substring(s, 0, 1) == " ")
498 s = substring(s, 1, 99999);
500 tokenize_sane(command);
501 } else if(rpncmd == "intersection") {
505 f = tokenize_sane(s);
506 f2 = tokenize_sane(strcat(s, " ", s2));
507 // tokens 0..(f-1) represent s
508 // tokens f..f2 represent s2
509 // INTERSECTION: keep only the tokens from s that are also in s2
511 for(i = 0; i < f; ++i) {
512 for(j = f; j < f2; ++j)
513 if(argv(i) == argv(j))
515 s = strcat(s, " ", argv(i));
519 if(substring(s, 0, 1) == " ")
520 s = substring(s, 1, 99999);
522 tokenize_sane(command);
523 } else if(rpncmd == "difference") {
527 f = tokenize_sane(s);
528 f2 = tokenize_sane(strcat(s, " ", s2));
529 // tokens 0..(f-1) represent s
530 // tokens f..f2 represent s2
531 // DIFFERENCE: keep only the tokens from s that are not in s2
533 for(i = 0; i < f; ++i) {
534 for(j = f; j < f2; ++j)
535 if(argv(i) == argv(j))
536 goto skip_difference;
537 s = strcat(s, " ", argv(i));
540 if(substring(s, 0, 1) == " ")
541 s = substring(s, 1, 99999);
543 tokenize_sane(command);
544 } else if(rpncmd == "shuffle") {
547 f = tokenize_sane(s);
549 for(i = 0; i < f - 1; ++i) {
550 // move a random item from i..f-1 to position i
552 f2 = floor(random() * (f - i) + i);
553 for(j = 0; j < i; ++j)
554 s = strcat(s, " ", argv(j));
555 s = strcat(s, " ", argv(f2));
556 for(j = i; j < f; ++j)
558 s = strcat(s, " ", argv(j));
559 f = tokenize_sane(s);
562 if(substring(s, 0, 1) == " ")
563 s = substring(s, 1, 99999);
565 tokenize_sane(command);
566 } else if(rpncmd == "fexists_assert") {
570 f = fopen(s, FILE_READ);
574 print("rpn: ERROR: ", s, " does not exist!\n");
579 rpn_push(cvar_string(rpncmd));
587 print("rpn: still on stack: ", s, "\n");
592 } else if(argv(0) == "cp") {
596 for(i = 2; i < argc; ++i)
597 s = strcat(s, " ", argv(i));
598 centerprint(unescape(s));