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)
52 argc = tokenize(command);
55 print(" rpn EXPRESSION... - a RPN calculator.\n");
56 print(" Operator description (x: string, s: set, f: float):\n");
57 print(" x pop -----------------------------> : removes the top\n");
58 print(" x dup -----------------------------> x x : duplicates the top\n");
59 print(" x x exch --------------------------> x x : swap the top two\n");
60 print(" /cvarname load --------------------> x : loads a cvar\n");
61 print(" /cvarname x def -------------------> : writes to a cvar\n");
62 print(" f f add|sub|mul|div|mod|max|min ---> f : adds/... two numbers\n");
63 print(" f f eq|ne|gt|ge|lt|le -------------> f : compares two numbers\n");
64 print(" f neg|abs|sgn|rand|floor|ceil------> f : negates/... a number\n");
65 print(" f f f bound -----------------------> f : bounds the middle number\n");
66 print(" f1 f2 b when ----------------------> f : f1 if b, f2 otherwise\n");
67 print(" s s union|intersection|difference -> s : set operations\n");
68 print(" s shuffle -------------------------> s : randomly arrange elements\n");
69 print(" x dbpush --------------------------> : pushes the top onto the database\n");
70 print(" dbpop|dbget -----------------------> x : removes/reads DB's top\n");
71 print(" dblen|dbat ------------------------> f : gets the DB's size/cursor pos\n");
72 print(" dbclr -----------------------------> : clear the DB\n");
73 print(" s dbsave|dbload--------------------> : save/load the DB to/from a file\n");
74 print(" x dbins ---------------------------> : moves the top into the DB\n");
75 print(" dbext|dbread ----------------------> x : extract/get from the DB's cursor\n");
76 print(" f dbmov|dbgoto --------------------> : move or set the DB's cursor\n");
77 print(" Set operations operate on 'such''strings'.\n");
78 print(" Unknown tokens insert their cvar value.\n");
79 print(" maplist add map\n");
80 print(" maplist remove map\n");
81 print(" maplist shuffle\n");
85 if(argv(0) == "maplist")
87 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")));
102 f = fopen(strcat("maps/", argv(2), ".mapcfg"), FILE_READ);
106 print("maplist: ERROR: ", argv(2), " does not exist!\n");
109 cvar_set("g_maplist", strcat("'", argv(2), "'", cvar_string("g_maplist")));
113 else if(argv(1) == "remove" && argc == 3)
117 n = tokenizebyseparator(cvar_string("g_maplist"), " ");
119 n = tokenize(cvar_string("g_maplist"));
122 for(i = 0; i < n; ++i)
126 s2 = strcat(s2, " ", argv(i));
128 s2 = strcat(s2, "'", argv(i), "'");
132 s2 = substring(s2, 1, strlen(s2) - 1);
134 cvar_set("g_maplist", s2);
137 else if(argv(1) == "shuffle" && argc == 2)
139 s = cvar_string("g_maplist");
141 for(i = 1; i < (n = tokenizebyseparator(s, " ")); ++i)
143 for(i = 1; i < (n = tokenize(s)); ++i)
146 // swap i-th item at a random position from 0 to i
147 // proof for even distribution:
150 // item n+1 gets at any position with chance 1/(n+1)
151 // all others will get their 1/n chance reduced by factor n/(n+1)
152 // to be on place n+1, their chance will be 1/(n+1)
153 // 1/n * n/(n+1) = 1/(n+1)
155 f = ceil(random() * (i + 1)) - 1; // 0 to i
157 continue; // no change
160 for(j = 0; j < n; ++j)
162 s2 = strcat(s2, " ", argv((j == i) ? f : (j == f) ? i : j));
163 s = substring(s2, 1, strlen(s2) - 1);
165 s2 = strcat(s2, "'", argv((j == i) ? f : (j == f) ? i : j), "'");
169 cvar_set("g_maplist", s);
173 else if(argv(0) == "rpn")
177 rpn_db = db_create();
178 db_put(rpn_db, "stack.pointer", "0");
179 db_put(rpn_db, "stack.pos", "-1");
188 for(rpnpos = 1; rpnpos < argc; ++rpnpos)
190 rpncmd = argv(rpnpos);
193 } else if(stof(substring(rpncmd, 0, 1)) > 0) {
195 } else if(substring(rpncmd, 0, 1) == "0") {
197 } else if(f >= 2 && substring(rpncmd, 0, 1) == "+") {
199 } else if(f >= 2 && substring(rpncmd, 0, 1) == "-") {
201 } else if(f >= 2 && substring(rpncmd, 0, 1) == "/") {
202 rpn_push(substring(rpncmd, 1, strlen(rpncmd) - 1));
203 } else if(rpncmd == "clear") {
205 } else if(rpncmd == "def" || rpncmd == "=") {
209 registercvar(s2, "", 0);
211 registercvar(s2, "");
213 if(!rpn_error) // don't change cvars if a stack error had happened!
215 } else if(rpncmd == "defs" || rpncmd == "@") {
219 while(rpn_sp > 1 && (j || i > 0))
221 s = strcat("/", rpn_pop(), " ", s);
226 registercvar(s2, "", 0);
228 registercvar(s2, "");
230 if(!rpn_error) // don't change cvars if a stack error had happened!
232 } else if(rpncmd == "load") {
233 rpn_set(cvar_string(rpn_get()));
234 } else if(rpncmd == "exch") {
239 } else if(rpncmd == "dup") {
241 } else if(rpncmd == "pop") {
243 } else if(rpncmd == "add" || rpncmd == "+") {
245 rpn_setf(rpn_getf() + f);
246 } else if(rpncmd == "sub" || rpncmd == "-") {
248 rpn_setf(rpn_getf() - f);
249 } else if(rpncmd == "mul" || rpncmd == "*") {
251 rpn_setf(rpn_getf() * f);
252 } else if(rpncmd == "div" || rpncmd == "/") {
254 rpn_setf(rpn_getf() / f);
255 } else if(rpncmd == "mod" || rpncmd == "%") {
258 rpn_setf(f2 - f * floor(f2 / f));
259 } else if(rpncmd == "abs") {
260 rpn_setf(fabs(rpn_getf()));
261 } else if(rpncmd == "sgn") {
269 } else if(rpncmd == "neg" || rpncmd == "~") {
270 rpn_setf(-rpn_getf());
271 } else if(rpncmd == "floor" || rpncmd == "f") {
272 rpn_setf(floor(rpn_getf()));
273 } else if(rpncmd == "ceil" || rpncmd == "c") {
274 rpn_setf(ceil(rpn_getf()));
275 } else if(rpncmd == "max") {
278 rpn_setf(max(f2, f));
279 } else if(rpncmd == "min") {
282 rpn_setf(min(f2, f));
283 } else if(rpncmd == "bound") {
287 rpn_setf(bound(f3, f2, f));
288 } else if(rpncmd == "when") {
296 } else if(rpncmd == ">" || rpncmd == "gt") {
298 rpn_setf(rpn_getf() > f);
299 } else if(rpncmd == "<" || rpncmd == "lt") {
301 rpn_setf(rpn_getf() < f);
302 } else if(rpncmd == "==" || rpncmd == "eq") {
304 rpn_setf(rpn_getf() == f);
305 } else if(rpncmd == ">=" || rpncmd == "ge") {
307 rpn_setf(rpn_getf() >= f);
308 } else if(rpncmd == "<=" || rpncmd == "le") {
310 rpn_setf(rpn_getf() <= f);
311 } else if(rpncmd == "!=" || rpncmd == "ne") {
313 rpn_setf(rpn_getf() != f);
314 } else if(rpncmd == "rand") {
315 rpn_setf(ceil(random() * rpn_getf()) - 1);
316 } else if(rpncmd == "dbpush") {
320 i = stof(db_get(rpn_db, "stack.pointer"));
321 db_put(rpn_db, "stack.pointer", ftos(i+1));
322 db_put(rpn_db, strcat("stack.", ftos(i)), s);
325 db_put(rpn_db, "stack.pos", "0");
326 } else if(rpncmd == "dbpop") {
327 i = stof(db_get(rpn_db, "stack.pointer"));
331 db_put(rpn_db, "stack.pointer", s);
332 rpn_push(db_get(rpn_db, strcat("stack.", s)));
333 j = stof(db_get(rpn_db, "stack.pos"));
335 db_put(rpn_db, "stack.pos", ftos(i-2));
338 print("rpn: database underflow\n");
340 } else if(rpncmd == "dbget") {
342 i = stof(db_get(rpn_db, "stack.pointer"));
345 rpn_push(db_get(rpn_db, strcat("stack.", ftos(i-1))));
348 print("rpn: database empty\n");
350 } else if(rpncmd == "dblen") {
351 rpn_push(db_get(rpn_db, "stack.pointer"));
352 } else if(rpncmd == "dbclr") {
354 rpn_db = db_create();
355 db_put(rpn_db, "stack.pointer", "0");
356 db_put(rpn_db, "stack.pos", "-1");
357 } else if(rpncmd == "dbsave") {
361 } else if(rpncmd == "dbload") {
368 } else if(rpncmd == "dbins") {
373 j = stof(db_get(rpn_db, "stack.pointer"));
374 i = stof(db_get(rpn_db, "stack.pos"));
379 db_put(rpn_db, "stack.pos", "0");
382 db_put(rpn_db, "stack.pointer", ftos(j+1));
383 for(--j; j >= i; --j)
385 db_put(rpn_db, strcat("stack.", ftos(j+1)),
386 db_get(rpn_db, (strcat("stack.", ftos(j))))
389 db_put(rpn_db, strcat("stack.", ftos(i)), s);
391 } else if(rpncmd == "dbext") {
392 j = stof(db_get(rpn_db, "stack.pointer"));
393 i = stof(db_get(rpn_db, "stack.pos"));
397 print("rpn: empty database\n");
400 rpn_push(db_get(rpn_db, strcat("stack.", ftos(i))));
401 db_put(rpn_db, "stack.pointer", ftos(j));
404 db_put(rpn_db, "stack.pos", ftos(j-1));
408 db_put(rpn_db, strcat("stack.", ftos(i)),
409 db_get(rpn_db, (strcat("stack.", ftos(i+1))))
415 } else if(rpncmd == "dbread") {
416 s = db_get(rpn_db, "stack.pos");
419 rpn_push(db_get(rpn_db, strcat("stack.", s)));
422 print("rpn: empty database\n");
424 } else if(rpncmd == "dbat") {
425 rpn_push(db_get(rpn_db, "stack.pos"));
426 } else if(rpncmd == "dbmov") {
427 j = stof(db_get(rpn_db, "stack.pointer"));
428 i = stof(db_get(rpn_db, "stack.pos"));
434 print("rpn: database cursor out of bounds\n");
439 db_put(rpn_db, "stack.pos", ftos(i));
442 } else if(rpncmd == "dbgoto") {
444 j = stof(db_get(rpn_db, "stack.pointer"));
448 print("rpn: empty database, cannot move cursor\n");
453 i = stof(db_get(rpn_db, "stack.pointer"))-1;
459 j = stof(db_get(rpn_db, "stack.pointer"));
462 print("rpn: database cursor destination out of bounds\n");
467 db_put(rpn_db, "stack.pos", ftos(i));
470 } else if(rpncmd == "union") {
475 f2 = tokenize(strcat(s, " ", s2));
476 // tokens 0..(f-1) represent s
477 // tokens f..f2 represent s2
478 // UNION: add all tokens to s that are in s2 but not in s
480 for(i = 0; i < f; ++i)
481 s = strcat(s, " ", argv(i));
482 for(i = f; i < f2; ++i) {
483 for(j = 0; j < f; ++j)
484 if(argv(i) == argv(j))
486 s = strcat(s, " ", argv(i));
489 if(substring(s, 0, 1) == " ")
490 s = substring(s, 1, 99999);
493 } else if(rpncmd == "intersection") {
498 f2 = tokenize(strcat(s, " ", s2));
499 // tokens 0..(f-1) represent s
500 // tokens f..f2 represent s2
501 // INTERSECTION: keep only the tokens from s that are also in s2
503 for(i = 0; i < f; ++i) {
504 for(j = f; j < f2; ++j)
505 if(argv(i) == argv(j))
507 s = strcat(s, " ", argv(i));
511 if(substring(s, 0, 1) == " ")
512 s = substring(s, 1, 99999);
515 } else if(rpncmd == "difference") {
520 f2 = tokenize(strcat(s, " ", s2));
521 // tokens 0..(f-1) represent s
522 // tokens f..f2 represent s2
523 // DIFFERENCE: keep only the tokens from s that are not in s2
525 for(i = 0; i < f; ++i) {
526 for(j = f; j < f2; ++j)
527 if(argv(i) == argv(j))
528 goto skip_difference;
529 s = strcat(s, " ", argv(i));
532 if(substring(s, 0, 1) == " ")
533 s = substring(s, 1, 99999);
536 } else if(rpncmd == "shuffle") {
541 for(i = 0; i < f - 1; ++i) {
542 // move a random item from i..f-1 to position i
544 f2 = ceil(random() * (f - i) + i) - 1;
545 for(j = 0; j < i; ++j)
546 s = strcat(s, " ", argv(j));
547 s = strcat(s, " ", argv(f2));
548 for(j = i; j < f; ++j)
550 s = strcat(s, " ", argv(j));
554 if(substring(s, 0, 1) == " ")
555 s = substring(s, 1, 99999);
558 } else if(rpncmd == "fexists_assert") {
562 f = fopen(s, FILE_READ);
566 print("rpn: ERROR: ", s, " does not exist!\n");
571 rpn_push(cvar_string(rpncmd));
579 print("rpn: still on stack: ", s, "\n");
584 } else if(argv(0) == "cp") {
588 for(i = 2; i < argc; ++i)
589 s = strcat(s, " ", argv(i));
590 centerprint(unescape(s));