The Battle for Wesnoth  1.15.10+dev
lmathlib.cpp
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1 /*
2 ** $Id: lmathlib.c $
3 ** Standard mathematical library
4 ** See Copyright Notice in lua.h
5 */
6 
7 #define lmathlib_c
8 #define LUA_LIB
9 
10 #include "lprefix.h"
11 
12 
13 #include <float.h>
14 #include <limits.h>
15 #include <math.h>
16 #include <stdlib.h>
17 #include <time.h>
18 
19 #include "lua.h"
20 
21 #include "lauxlib.h"
22 #include "lualib.h"
23 
24 
25 #undef PI
26 #define PI (l_mathop(3.141592653589793238462643383279502884))
27 
28 
29 static int math_abs (lua_State *L) {
30  if (lua_isinteger(L, 1)) {
31  lua_Integer n = lua_tointeger(L, 1);
32  if (n < 0) n = (lua_Integer)(0u - (lua_Unsigned)n);
33  lua_pushinteger(L, n);
34  }
35  else
36  lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
37  return 1;
38 }
39 
40 static int math_sin (lua_State *L) {
42  return 1;
43 }
44 
45 static int math_cos (lua_State *L) {
47  return 1;
48 }
49 
50 static int math_tan (lua_State *L) {
52  return 1;
53 }
54 
55 static int math_asin (lua_State *L) {
56  lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
57  return 1;
58 }
59 
60 static int math_acos (lua_State *L) {
61  lua_pushnumber(L, l_mathop(acos)(luaL_checknumber(L, 1)));
62  return 1;
63 }
64 
65 static int math_atan (lua_State *L) {
66  lua_Number y = luaL_checknumber(L, 1);
67  lua_Number x = luaL_optnumber(L, 2, 1);
68  lua_pushnumber(L, l_mathop(atan2)(y, x));
69  return 1;
70 }
71 
72 
73 static int math_toint (lua_State *L) {
74  int valid;
75  lua_Integer n = lua_tointegerx(L, 1, &valid);
76  if (valid)
77  lua_pushinteger(L, n);
78  else {
79  luaL_checkany(L, 1);
80  luaL_pushfail(L); /* value is not convertible to integer */
81  }
82  return 1;
83 }
84 
85 
86 static void pushnumint (lua_State *L, lua_Number d) {
87  lua_Integer n;
88  if (lua_numbertointeger(d, &n)) /* does 'd' fit in an integer? */
89  lua_pushinteger(L, n); /* result is integer */
90  else
91  lua_pushnumber(L, d); /* result is float */
92 }
93 
94 
95 static int math_floor (lua_State *L) {
96  if (lua_isinteger(L, 1))
97  lua_settop(L, 1); /* integer is its own floor */
98  else {
99  lua_Number d = l_mathop(floor)(luaL_checknumber(L, 1));
100  pushnumint(L, d);
101  }
102  return 1;
103 }
104 
105 
106 static int math_ceil (lua_State *L) {
107  if (lua_isinteger(L, 1))
108  lua_settop(L, 1); /* integer is its own ceil */
109  else {
110  lua_Number d = l_mathop(ceil)(luaL_checknumber(L, 1));
111  pushnumint(L, d);
112  }
113  return 1;
114 }
115 
116 
117 static int math_fmod (lua_State *L) {
118  if (lua_isinteger(L, 1) && lua_isinteger(L, 2)) {
119  lua_Integer d = lua_tointeger(L, 2);
120  if ((lua_Unsigned)d + 1u <= 1u) { /* special cases: -1 or 0 */
121  luaL_argcheck(L, d != 0, 2, "zero");
122  lua_pushinteger(L, 0); /* avoid overflow with 0x80000... / -1 */
123  }
124  else
125  lua_pushinteger(L, lua_tointeger(L, 1) % d);
126  }
127  else
129  luaL_checknumber(L, 2)));
130  return 1;
131 }
132 
133 
134 /*
135 ** next function does not use 'modf', avoiding problems with 'double*'
136 ** (which is not compatible with 'float*') when lua_Number is not
137 ** 'double'.
138 */
139 static int math_modf (lua_State *L) {
140  if (lua_isinteger(L ,1)) {
141  lua_settop(L, 1); /* number is its own integer part */
142  lua_pushnumber(L, 0); /* no fractional part */
143  }
144  else {
145  lua_Number n = luaL_checknumber(L, 1);
146  /* integer part (rounds toward zero) */
147  lua_Number ip = (n < 0) ? l_mathop(ceil)(n) : l_mathop(floor)(n);
148  pushnumint(L, ip);
149  /* fractional part (test needed for inf/-inf) */
150  lua_pushnumber(L, (n == ip) ? l_mathop(0.0) : (n - ip));
151  }
152  return 2;
153 }
154 
155 
156 static int math_sqrt (lua_State *L) {
157  lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
158  return 1;
159 }
160 
161 
162 static int math_ult (lua_State *L) {
166  return 1;
167 }
168 
169 static int math_log (lua_State *L) {
170  lua_Number x = luaL_checknumber(L, 1);
171  lua_Number res;
172  if (lua_isnoneornil(L, 2))
173  res = l_mathop(log)(x);
174  else {
175  lua_Number base = luaL_checknumber(L, 2);
176 #if !defined(LUA_USE_C89)
177  if (base == l_mathop(2.0))
178  res = l_mathop(log2)(x); else
179 #endif
180  if (base == l_mathop(10.0))
181  res = l_mathop(log10)(x);
182  else
183  res = l_mathop(log)(x)/l_mathop(log)(base);
184  }
185  lua_pushnumber(L, res);
186  return 1;
187 }
188 
189 static int math_exp (lua_State *L) {
190  lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
191  return 1;
192 }
193 
194 static int math_deg (lua_State *L) {
195  lua_pushnumber(L, luaL_checknumber(L, 1) * (l_mathop(180.0) / PI));
196  return 1;
197 }
198 
199 static int math_rad (lua_State *L) {
200  lua_pushnumber(L, luaL_checknumber(L, 1) * (PI / l_mathop(180.0)));
201  return 1;
202 }
203 
204 
205 static int math_min (lua_State *L) {
206  int n = lua_gettop(L); /* number of arguments */
207  int imin = 1; /* index of current minimum value */
208  int i;
209  luaL_argcheck(L, n >= 1, 1, "value expected");
210  for (i = 2; i <= n; i++) {
211  if (lua_compare(L, i, imin, LUA_OPLT))
212  imin = i;
213  }
214  lua_pushvalue(L, imin);
215  return 1;
216 }
217 
218 
219 static int math_max (lua_State *L) {
220  int n = lua_gettop(L); /* number of arguments */
221  int imax = 1; /* index of current maximum value */
222  int i;
223  luaL_argcheck(L, n >= 1, 1, "value expected");
224  for (i = 2; i <= n; i++) {
225  if (lua_compare(L, imax, i, LUA_OPLT))
226  imax = i;
227  }
228  lua_pushvalue(L, imax);
229  return 1;
230 }
231 
232 
233 static int math_type (lua_State *L) {
234  if (lua_type(L, 1) == LUA_TNUMBER)
235  lua_pushstring(L, (lua_isinteger(L, 1)) ? "integer" : "float");
236  else {
237  luaL_checkany(L, 1);
238  luaL_pushfail(L);
239  }
240  return 1;
241 }
242 
243 
244 
245 /*
246 ** {==================================================================
247 ** Pseudo-Random Number Generator based on 'xoshiro256**'.
248 ** ===================================================================
249 */
250 
251 /* number of binary digits in the mantissa of a float */
252 #define FIGS l_floatatt(MANT_DIG)
253 
254 #if FIGS > 64
255 /* there are only 64 random bits; use them all */
256 #undef FIGS
257 #define FIGS 64
258 #endif
259 
260 
261 /*
262 ** LUA_RAND32 forces the use of 32-bit integers in the implementation
263 ** of the PRN generator (mainly for testing).
264 */
265 #if !defined(LUA_RAND32) && !defined(Rand64)
266 
267 /* try to find an integer type with at least 64 bits */
268 
269 #if (ULONG_MAX >> 31 >> 31) >= 3
270 
271 /* 'long' has at least 64 bits */
272 #define Rand64 unsigned long
273 
274 #elif !defined(LUA_USE_C89) && defined(LLONG_MAX)
275 
276 /* there is a 'long long' type (which must have at least 64 bits) */
277 #define Rand64 unsigned long long
278 
279 #elif (LUA_MAXUNSIGNED >> 31 >> 31) >= 3
280 
281 /* 'lua_Integer' has at least 64 bits */
282 #define Rand64 lua_Unsigned
283 
284 #endif
285 
286 #endif
287 
288 
289 #if defined(Rand64) /* { */
290 
291 /*
292 ** Standard implementation, using 64-bit integers.
293 ** If 'Rand64' has more than 64 bits, the extra bits do not interfere
294 ** with the 64 initial bits, except in a right shift. Moreover, the
295 ** final result has to discard the extra bits.
296 */
297 
298 /* avoid using extra bits when needed */
299 #define trim64(x) ((x) & 0xffffffffffffffffu)
300 
301 
302 /* rotate left 'x' by 'n' bits */
303 static Rand64 rotl (Rand64 x, int n) {
304  return (x << n) | (trim64(x) >> (64 - n));
305 }
306 
307 static Rand64 nextrand (Rand64 *state) {
308  Rand64 state0 = state[0];
309  Rand64 state1 = state[1];
310  Rand64 state2 = state[2] ^ state0;
311  Rand64 state3 = state[3] ^ state1;
312  Rand64 res = rotl(state1 * 5, 7) * 9;
313  state[0] = state0 ^ state3;
314  state[1] = state1 ^ state2;
315  state[2] = state2 ^ (state1 << 17);
316  state[3] = rotl(state3, 45);
317  return res;
318 }
319 
320 
321 /* must take care to not shift stuff by more than 63 slots */
322 
323 
324 /*
325 ** Convert bits from a random integer into a float in the
326 ** interval [0,1), getting the higher FIG bits from the
327 ** random unsigned integer and converting that to a float.
328 */
329 
330 /* must throw out the extra (64 - FIGS) bits */
331 #define shift64_FIG (64 - FIGS)
332 
333 /* to scale to [0, 1), multiply by scaleFIG = 2^(-FIGS) */
334 #define scaleFIG (l_mathop(0.5) / ((Rand64)1 << (FIGS - 1)))
335 
336 static lua_Number I2d (Rand64 x) {
337  return (lua_Number)(trim64(x) >> shift64_FIG) * scaleFIG;
338 }
339 
340 /* convert a 'Rand64' to a 'lua_Unsigned' */
341 #define I2UInt(x) ((lua_Unsigned)trim64(x))
342 
343 /* convert a 'lua_Unsigned' to a 'Rand64' */
344 #define Int2I(x) ((Rand64)(x))
345 
346 
347 #else /* no 'Rand64' }{ */
348 
349 /* get an integer with at least 32 bits */
350 #if LUAI_IS32INT
351 typedef unsigned int lu_int32;
352 #else
353 typedef unsigned long lu_int32;
354 #endif
355 
356 
357 /*
358 ** Use two 32-bit integers to represent a 64-bit quantity.
359 */
360 typedef struct Rand64 {
361  lu_int32 h; /* higher half */
362  lu_int32 l; /* lower half */
363 } Rand64;
364 
365 
366 /*
367 ** If 'lu_int32' has more than 32 bits, the extra bits do not interfere
368 ** with the 32 initial bits, except in a right shift and comparisons.
369 ** Moreover, the final result has to discard the extra bits.
370 */
371 
372 /* avoid using extra bits when needed */
373 #define trim32(x) ((x) & 0xffffffffu)
374 
375 
376 /*
377 ** basic operations on 'Rand64' values
378 */
379 
380 /* build a new Rand64 value */
382  Rand64 result;
383  result.h = h;
384  result.l = l;
385  return result;
386 }
387 
388 /* return i << n */
389 static Rand64 Ishl (Rand64 i, int n) {
390  lua_assert(n > 0 && n < 32);
391  return packI((i.h << n) | (trim32(i.l) >> (32 - n)), i.l << n);
392 }
393 
394 /* i1 ^= i2 */
395 static void Ixor (Rand64 *i1, Rand64 i2) {
396  i1->h ^= i2.h;
397  i1->l ^= i2.l;
398 }
399 
400 /* return i1 + i2 */
401 static Rand64 Iadd (Rand64 i1, Rand64 i2) {
402  Rand64 result = packI(i1.h + i2.h, i1.l + i2.l);
403  if (trim32(result.l) < trim32(i1.l)) /* carry? */
404  result.h++;
405  return result;
406 }
407 
408 /* return i * 5 */
409 static Rand64 times5 (Rand64 i) {
410  return Iadd(Ishl(i, 2), i); /* i * 5 == (i << 2) + i */
411 }
412 
413 /* return i * 9 */
414 static Rand64 times9 (Rand64 i) {
415  return Iadd(Ishl(i, 3), i); /* i * 9 == (i << 3) + i */
416 }
417 
418 /* return 'i' rotated left 'n' bits */
419 static Rand64 rotl (Rand64 i, int n) {
420  lua_assert(n > 0 && n < 32);
421  return packI((i.h << n) | (trim32(i.l) >> (32 - n)),
422  (trim32(i.h) >> (32 - n)) | (i.l << n));
423 }
424 
425 /* for offsets larger than 32, rotate right by 64 - offset */
426 static Rand64 rotl1 (Rand64 i, int n) {
427  lua_assert(n > 32 && n < 64);
428  n = 64 - n;
429  return packI((trim32(i.h) >> n) | (i.l << (32 - n)),
430  (i.h << (32 - n)) | (trim32(i.l) >> n));
431 }
432 
433 /*
434 ** implementation of 'xoshiro256**' algorithm on 'Rand64' values
435 */
436 static Rand64 nextrand (Rand64 *state) {
437  Rand64 res = times9(rotl(times5(state[1]), 7));
438  Rand64 t = Ishl(state[1], 17);
439  Ixor(&state[2], state[0]);
440  Ixor(&state[3], state[1]);
441  Ixor(&state[1], state[2]);
442  Ixor(&state[0], state[3]);
443  Ixor(&state[2], t);
444  state[3] = rotl1(state[3], 45);
445  return res;
446 }
447 
448 
449 /*
450 ** Converts a 'Rand64' into a float.
451 */
452 
453 /* an unsigned 1 with proper type */
454 #define UONE ((lu_int32)1)
455 
456 
457 #if FIGS <= 32
458 
459 /* 2^(-FIGS) */
460 #define scaleFIG (l_mathop(0.5) / (UONE << (FIGS - 1)))
461 
462 /*
463 ** get up to 32 bits from higher half, shifting right to
464 ** throw out the extra bits.
465 */
466 static lua_Number I2d (Rand64 x) {
467  lua_Number h = (lua_Number)(trim32(x.h) >> (32 - FIGS));
468  return h * scaleFIG;
469 }
470 
471 #else /* 32 < FIGS <= 64 */
472 
473 /* must take care to not shift stuff by more than 31 slots */
474 
475 /* 2^(-FIGS) = 1.0 / 2^30 / 2^3 / 2^(FIGS-33) */
476 #define scaleFIG \
477  ((lua_Number)1.0 / (UONE << 30) / 8.0 / (UONE << (FIGS - 33)))
478 
479 /*
480 ** use FIGS - 32 bits from lower half, throwing out the other
481 ** (32 - (FIGS - 32)) = (64 - FIGS) bits
482 */
483 #define shiftLOW (64 - FIGS)
484 
485 /*
486 ** higher 32 bits go after those (FIGS - 32) bits: shiftHI = 2^(FIGS - 32)
487 */
488 #define shiftHI ((lua_Number)(UONE << (FIGS - 33)) * 2.0)
489 
490 
491 static lua_Number I2d (Rand64 x) {
492  lua_Number h = (lua_Number)trim32(x.h) * shiftHI;
493  lua_Number l = (lua_Number)(trim32(x.l) >> shiftLOW);
494  return (h + l) * scaleFIG;
495 }
496 
497 #endif
498 
499 
500 /* convert a 'Rand64' to a 'lua_Unsigned' */
502  return ((lua_Unsigned)trim32(x.h) << 31 << 1) | (lua_Unsigned)trim32(x.l);
503 }
504 
505 /* convert a 'lua_Unsigned' to a 'Rand64' */
507  return packI((lu_int32)(n >> 31 >> 1), (lu_int32)n);
508 }
509 
510 #endif /* } */
511 
512 
513 /*
514 ** A state uses four 'Rand64' values.
515 */
516 typedef struct {
517  Rand64 s[4];
518 } RanState;
519 
520 
521 /*
522 ** Project the random integer 'ran' into the interval [0, n].
523 ** Because 'ran' has 2^B possible values, the projection can only be
524 ** uniform when the size of the interval is a power of 2 (exact
525 ** division). Otherwise, to get a uniform projection into [0, n], we
526 ** first compute 'lim', the smallest Mersenne number not smaller than
527 ** 'n'. We then project 'ran' into the interval [0, lim]. If the result
528 ** is inside [0, n], we are done. Otherwise, we try with another 'ran',
529 ** until we have a result inside the interval.
530 */
532  RanState *state) {
533  if ((n & (n + 1)) == 0) /* is 'n + 1' a power of 2? */
534  return ran & n; /* no bias */
535  else {
536  lua_Unsigned lim = n;
537  /* compute the smallest (2^b - 1) not smaller than 'n' */
538  lim |= (lim >> 1);
539  lim |= (lim >> 2);
540  lim |= (lim >> 4);
541  lim |= (lim >> 8);
542  lim |= (lim >> 16);
543 #if (LUA_MAXUNSIGNED >> 31) >= 3
544  lim |= (lim >> 32); /* integer type has more than 32 bits */
545 #endif
546  lua_assert((lim & (lim + 1)) == 0 /* 'lim + 1' is a power of 2, */
547  && lim >= n /* not smaller than 'n', */
548  && (lim >> 1) < n); /* and it is the smallest one */
549  while ((ran &= lim) > n) /* project 'ran' into [0..lim] */
550  ran = I2UInt(nextrand(state->s)); /* not inside [0..n]? try again */
551  return ran;
552  }
553 }
554 
555 
556 static int math_random (lua_State *L) {
557  lua_Integer low, up;
558  lua_Unsigned p;
560  Rand64 rv = nextrand(state->s); /* next pseudo-random value */
561  switch (lua_gettop(L)) { /* check number of arguments */
562  case 0: { /* no arguments */
563  lua_pushnumber(L, I2d(rv)); /* float between 0 and 1 */
564  return 1;
565  }
566  case 1: { /* only upper limit */
567  low = 1;
568  up = luaL_checkinteger(L, 1);
569  if (up == 0) { /* single 0 as argument? */
570  lua_pushinteger(L, I2UInt(rv)); /* full random integer */
571  return 1;
572  }
573  break;
574  }
575  case 2: { /* lower and upper limits */
576  low = luaL_checkinteger(L, 1);
577  up = luaL_checkinteger(L, 2);
578  break;
579  }
580  default: return luaL_error(L, "wrong number of arguments");
581  }
582  /* random integer in the interval [low, up] */
583  luaL_argcheck(L, low <= up, 1, "interval is empty");
584  /* project random integer into the interval [0, up - low] */
585  p = project(I2UInt(rv), (lua_Unsigned)up - (lua_Unsigned)low, state);
586  lua_pushinteger(L, p + (lua_Unsigned)low);
587  return 1;
588 }
589 
590 
591 static void setseed (lua_State *L, Rand64 *state,
592  lua_Unsigned n1, lua_Unsigned n2) {
593  int i;
594  state[0] = Int2I(n1);
595  state[1] = Int2I(0xff); /* avoid a zero state */
596  state[2] = Int2I(n2);
597  state[3] = Int2I(0);
598  for (i = 0; i < 16; i++)
599  nextrand(state); /* discard initial values to "spread" seed */
600  lua_pushinteger(L, n1);
601  lua_pushinteger(L, n2);
602 }
603 
604 
605 /*
606 ** Set a "random" seed. To get some randomness, use the current time
607 ** and the address of 'L' (in case the machine does address space layout
608 ** randomization).
609 */
610 static void randseed (lua_State *L, RanState *state) {
611  lua_Unsigned seed1 = (lua_Unsigned)time(NULL);
612  lua_Unsigned seed2 = (lua_Unsigned)(size_t)L;
613  setseed(L, state->s, seed1, seed2);
614 }
615 
616 
617 static int math_randomseed (lua_State *L) {
619  if (lua_isnone(L, 1)) {
620  randseed(L, state);
621  }
622  else {
623  lua_Integer n1 = luaL_checkinteger(L, 1);
624  lua_Integer n2 = luaL_optinteger(L, 2, 0);
625  setseed(L, state->s, n1, n2);
626  }
627  return 2; /* return seeds */
628 }
629 
630 
631 static const luaL_Reg randfuncs[] = {
632  {"random", math_random},
633  {"randomseed", math_randomseed},
634  {NULL, NULL}
635 };
636 
637 
638 /*
639 ** Register the random functions and initialize their state.
640 */
641 static void setrandfunc (lua_State *L) {
642  RanState *state = (RanState *)lua_newuserdatauv(L, sizeof(RanState), 0);
643  randseed(L, state); /* initialize with a "random" seed */
644  lua_pop(L, 2); /* remove pushed seeds */
645  luaL_setfuncs(L, randfuncs, 1);
646 }
647 
648 /* }================================================================== */
649 
650 
651 /*
652 ** {==================================================================
653 ** Deprecated functions (for compatibility only)
654 ** ===================================================================
655 */
656 #if defined(LUA_COMPAT_MATHLIB)
657 
658 static int math_cosh (lua_State *L) {
659  lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
660  return 1;
661 }
662 
663 static int math_sinh (lua_State *L) {
664  lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
665  return 1;
666 }
667 
668 static int math_tanh (lua_State *L) {
669  lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
670  return 1;
671 }
672 
673 static int math_pow (lua_State *L) {
674  lua_Number x = luaL_checknumber(L, 1);
675  lua_Number y = luaL_checknumber(L, 2);
676  lua_pushnumber(L, l_mathop(pow)(x, y));
677  return 1;
678 }
679 
680 static int math_frexp (lua_State *L) {
681  int e;
682  lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));
683  lua_pushinteger(L, e);
684  return 2;
685 }
686 
687 static int math_ldexp (lua_State *L) {
688  lua_Number x = luaL_checknumber(L, 1);
689  int ep = (int)luaL_checkinteger(L, 2);
690  lua_pushnumber(L, l_mathop(ldexp)(x, ep));
691  return 1;
692 }
693 
694 static int math_log10 (lua_State *L) {
695  lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
696  return 1;
697 }
698 
699 #endif
700 /* }================================================================== */
701 
702 
703 
704 static const luaL_Reg mathlib[] = {
705  {"abs", math_abs},
706  {"acos", math_acos},
707  {"asin", math_asin},
708  {"atan", math_atan},
709  {"ceil", math_ceil},
710  {"cos", math_cos},
711  {"deg", math_deg},
712  {"exp", math_exp},
713  {"tointeger", math_toint},
714  {"floor", math_floor},
715  {"fmod", math_fmod},
716  {"ult", math_ult},
717  {"log", math_log},
718  {"max", math_max},
719  {"min", math_min},
720  {"modf", math_modf},
721  {"rad", math_rad},
722  {"sin", math_sin},
723  {"sqrt", math_sqrt},
724  {"tan", math_tan},
725  {"type", math_type},
726 #if defined(LUA_COMPAT_MATHLIB)
727  {"atan2", math_atan},
728  {"cosh", math_cosh},
729  {"sinh", math_sinh},
730  {"tanh", math_tanh},
731  {"pow", math_pow},
732  {"frexp", math_frexp},
733  {"ldexp", math_ldexp},
734  {"log10", math_log10},
735 #endif
736  /* placeholders */
737  {"random", NULL},
738  {"randomseed", NULL},
739  {"pi", NULL},
740  {"huge", NULL},
741  {"maxinteger", NULL},
742  {"mininteger", NULL},
743  {NULL, NULL}
744 };
745 
746 
747 /*
748 ** Open math library
749 */
751  luaL_newlib(L, mathlib);
752  lua_pushnumber(L, PI);
753  lua_setfield(L, -2, "pi");
754  lua_pushnumber(L, (lua_Number)HUGE_VAL);
755  lua_setfield(L, -2, "huge");
756  lua_pushinteger(L, LUA_MAXINTEGER);
757  lua_setfield(L, -2, "maxinteger");
758  lua_pushinteger(L, LUA_MININTEGER);
759  lua_setfield(L, -2, "mininteger");
760  setrandfunc(L);
761  return 1;
762 }
763 
static int math_abs(lua_State *L)
Definition: lmathlib.cpp:29
#define lua_isnoneornil(L, n)
Definition: lua.h:379
static int math_asin(lua_State *L)
Definition: lmathlib.cpp:55
static Rand64 Int2I(lua_Unsigned n)
Definition: lmathlib.cpp:506
static int math_randomseed(lua_State *L)
Definition: lmathlib.cpp:617
static int math_tan(lua_State *L)
Definition: lmathlib.cpp:50
LUALIB_API lua_Number luaL_checknumber(lua_State *L, int arg)
Definition: lauxlib.cpp:420
LUA_API void lua_settop(lua_State *L, int idx)
Definition: lapi.cpp:173
#define lua_isnone(L, n)
Definition: lua.h:378
LUA_API int lua_type(lua_State *L, int idx)
Definition: lapi.cpp:260
#define luaL_pushfail(L)
Definition: lauxlib.h:157
static int math_ult(lua_State *L)
Definition: lmathlib.cpp:162
LUA_API void lua_pushboolean(lua_State *L, int b)
Definition: lapi.cpp:581
static int math_max(lua_State *L)
Definition: lmathlib.cpp:219
#define PI
Definition: lmathlib.cpp:26
#define a
static void Ixor(Rand64 *i1, Rand64 i2)
Definition: lmathlib.cpp:395
LUA_API int lua_gettop(lua_State *L)
Definition: lapi.cpp:168
static Rand64 Iadd(Rand64 i1, Rand64 i2)
Definition: lmathlib.cpp:401
#define FIGS
Definition: lmathlib.cpp:252
static Rand64 rotl1(Rand64 i, int n)
Definition: lmathlib.cpp:426
LUAMOD_API int luaopen_math(lua_State *L)
Definition: lmathlib.cpp:750
Rand64 s[4]
Definition: lmathlib.cpp:517
struct Rand64 Rand64
#define lua_tointeger(L, i)
Definition: lua.h:362
lu_int32 l
Definition: lmathlib.cpp:362
#define scaleFIG
Definition: lmathlib.cpp:460
static int math_exp(lua_State *L)
Definition: lmathlib.cpp:189
LUALIB_API lua_Integer luaL_optinteger(lua_State *L, int arg, lua_Integer def)
Definition: lauxlib.cpp:452
#define d
#define lua_pop(L, n)
Definition: lua.h:364
static int math_random(lua_State *L)
Definition: lmathlib.cpp:556
#define LUA_OPLT
Definition: lua.h:223
#define b
static int math_modf(lua_State *L)
Definition: lmathlib.cpp:139
static lua_Unsigned project(lua_Unsigned ran, lua_Unsigned n, RanState *state)
Definition: lmathlib.cpp:531
#define lua_upvalueindex(i)
Definition: lua.h:45
LUA_INTEGER lua_Integer
Definition: lua.h:94
LUA_API int lua_compare(lua_State *L, int index1, int index2, int op)
Definition: lapi.cpp:327
static void randseed(lua_State *L, RanState *state)
Definition: lmathlib.cpp:610
static const luaL_Reg mathlib[]
Definition: lmathlib.cpp:704
static Rand64 rotl(Rand64 i, int n)
Definition: lmathlib.cpp:419
static lua_Number I2d(Rand64 x)
Definition: lmathlib.cpp:466
unsigned long lu_int32
Definition: lmathlib.cpp:353
#define lua_numbertointeger(n, p)
Definition: luaconf.h:413
static int math_min(lua_State *L)
Definition: lmathlib.cpp:205
LUA_API void * lua_newuserdatauv(lua_State *L, size_t size, int nuvalue)
Definition: lapi.cpp:1311
static void setseed(lua_State *L, Rand64 *state, lua_Unsigned n1, lua_Unsigned n2)
Definition: lmathlib.cpp:591
#define LUA_TNUMBER
Definition: lua.h:68
static int math_type(lua_State *L)
Definition: lmathlib.cpp:233
static int math_cos(lua_State *L)
Definition: lmathlib.cpp:45
static Rand64 packI(lu_int32 h, lu_int32 l)
Definition: lmathlib.cpp:381
static int math_floor(lua_State *L)
Definition: lmathlib.cpp:95
static int math_log(lua_State *L)
Definition: lmathlib.cpp:169
static int math_toint(lua_State *L)
Definition: lmathlib.cpp:73
LUA_API void lua_pushnumber(lua_State *L, lua_Number n)
Definition: lapi.cpp:481
static Rand64 times9(Rand64 i)
Definition: lmathlib.cpp:414
static lua_Unsigned I2UInt(Rand64 x)
Definition: lmathlib.cpp:501
LUA_API void * lua_touserdata(lua_State *L, int idx)
Definition: lapi.cpp:432
LUA_API lua_Integer lua_tointegerx(lua_State *L, int idx, int *pisnum)
Definition: lapi.cpp:365
#define lua_assert(c)
Definition: llimits.h:101
std::size_t i
Definition: function.cpp:934
static Rand64 nextrand(Rand64 *state)
Definition: lmathlib.cpp:436
static int math_deg(lua_State *L)
Definition: lmathlib.cpp:194
LUALIB_API lua_Integer luaL_checkinteger(lua_State *L, int arg)
Definition: lauxlib.cpp:442
mock_party p
static map_location::DIRECTION s
#define LUAMOD_API
Definition: luaconf.h:286
#define trim32(x)
Definition: lmathlib.cpp:373
static void setrandfunc(lua_State *L)
Definition: lmathlib.cpp:641
LUA_API void lua_pushvalue(lua_State *L, int idx)
Definition: lapi.cpp:246
LUA_API int lua_isinteger(lua_State *L, int idx)
Definition: lapi.cpp:279
#define luaL_newlib(L, l)
Definition: lauxlib.h:129
#define l_mathop(op)
Definition: luaconf.h:463
LUA_UNSIGNED lua_Unsigned
Definition: lua.h:97
LUALIB_API int luaL_error(lua_State *L, const char *fmt,...)
Definition: lauxlib.cpp:234
#define luaL_argcheck(L, cond, arg, extramsg)
Definition: lauxlib.h:132
LUALIB_API void luaL_checkany(lua_State *L, int arg)
Definition: lauxlib.cpp:396
static Rand64 Ishl(Rand64 i, int n)
Definition: lmathlib.cpp:389
static int math_ceil(lua_State *L)
Definition: lmathlib.cpp:106
static int math_fmod(lua_State *L)
Definition: lmathlib.cpp:117
static void pushnumint(lua_State *L, lua_Number d)
Definition: lmathlib.cpp:86
static int math_acos(lua_State *L)
Definition: lmathlib.cpp:60
double t
Definition: astarsearch.cpp:64
static const luaL_Reg randfuncs[]
Definition: lmathlib.cpp:631
static int math_rad(lua_State *L)
Definition: lmathlib.cpp:199
lu_int32 h
Definition: lmathlib.cpp:361
#define e
static int math_sqrt(lua_State *L)
Definition: lmathlib.cpp:156
LUALIB_API void luaL_setfuncs(lua_State *L, const luaL_Reg *l, int nup)
Definition: lauxlib.cpp:904
static Rand64 times5(Rand64 i)
Definition: lmathlib.cpp:409
static map_location::DIRECTION n
LUA_API void lua_pushinteger(lua_State *L, lua_Integer n)
Definition: lapi.cpp:489
static int math_atan(lua_State *L)
Definition: lmathlib.cpp:65
LUA_NUMBER lua_Number
Definition: lua.h:90
LUA_API const char * lua_pushstring(lua_State *L, const char *s)
Definition: lapi.cpp:514
LUA_API void lua_setfield(lua_State *L, int idx, const char *k)
Definition: lapi.cpp:837
LUALIB_API lua_Number luaL_optnumber(lua_State *L, int arg, lua_Number def)
Definition: lauxlib.cpp:429
static int math_sin(lua_State *L)
Definition: lmathlib.cpp:40