/[jscoverage]/trunk/js/jsmath.cpp
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Contents of /trunk/js/jsmath.cpp

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Revision 399 - (show annotations)
Tue Dec 9 03:37:47 2008 UTC (11 years ago) by siliconforks
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1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 *
3 * ***** BEGIN LICENSE BLOCK *****
4 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 *
6 * The contents of this file are subject to the Mozilla Public License Version
7 * 1.1 (the "License"); you may not use this file except in compliance with
8 * the License. You may obtain a copy of the License at
9 * http://www.mozilla.org/MPL/
10 *
11 * Software distributed under the License is distributed on an "AS IS" basis,
12 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 * for the specific language governing rights and limitations under the
14 * License.
15 *
16 * The Original Code is Mozilla Communicator client code, released
17 * March 31, 1998.
18 *
19 * The Initial Developer of the Original Code is
20 * Netscape Communications Corporation.
21 * Portions created by the Initial Developer are Copyright (C) 1998
22 * the Initial Developer. All Rights Reserved.
23 *
24 * Contributor(s):
25 *
26 * Alternatively, the contents of this file may be used under the terms of
27 * either of the GNU General Public License Version 2 or later (the "GPL"),
28 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 * in which case the provisions of the GPL or the LGPL are applicable instead
30 * of those above. If you wish to allow use of your version of this file only
31 * under the terms of either the GPL or the LGPL, and not to allow others to
32 * use your version of this file under the terms of the MPL, indicate your
33 * decision by deleting the provisions above and replace them with the notice
34 * and other provisions required by the GPL or the LGPL. If you do not delete
35 * the provisions above, a recipient may use your version of this file under
36 * the terms of any one of the MPL, the GPL or the LGPL.
37 *
38 * ***** END LICENSE BLOCK ***** */
39
40 /*
41 * JS math package.
42 */
43 #include "jsstddef.h"
44 #include "jslibmath.h"
45 #include <stdlib.h>
46 #include "jstypes.h"
47 #include "jslong.h"
48 #include "prmjtime.h"
49 #include "jsapi.h"
50 #include "jsatom.h"
51 #include "jsbuiltins.h"
52 #include "jscntxt.h"
53 #include "jsversion.h"
54 #include "jslock.h"
55 #include "jsmath.h"
56 #include "jsnum.h"
57 #include "jsobj.h"
58
59 extern jsdouble js_NaN;
60
61 #ifndef M_E
62 #define M_E 2.7182818284590452354
63 #endif
64 #ifndef M_LOG2E
65 #define M_LOG2E 1.4426950408889634074
66 #endif
67 #ifndef M_LOG10E
68 #define M_LOG10E 0.43429448190325182765
69 #endif
70 #ifndef M_LN2
71 #define M_LN2 0.69314718055994530942
72 #endif
73 #ifndef M_LN10
74 #define M_LN10 2.30258509299404568402
75 #endif
76 #ifndef M_PI
77 #define M_PI 3.14159265358979323846
78 #endif
79 #ifndef M_SQRT2
80 #define M_SQRT2 1.41421356237309504880
81 #endif
82 #ifndef M_SQRT1_2
83 #define M_SQRT1_2 0.70710678118654752440
84 #endif
85
86 static JSConstDoubleSpec math_constants[] = {
87 {M_E, "E", 0, {0,0,0}},
88 {M_LOG2E, "LOG2E", 0, {0,0,0}},
89 {M_LOG10E, "LOG10E", 0, {0,0,0}},
90 {M_LN2, "LN2", 0, {0,0,0}},
91 {M_LN10, "LN10", 0, {0,0,0}},
92 {M_PI, "PI", 0, {0,0,0}},
93 {M_SQRT2, "SQRT2", 0, {0,0,0}},
94 {M_SQRT1_2, "SQRT1_2", 0, {0,0,0}},
95 {0,0,0,{0,0,0}}
96 };
97
98 JSClass js_MathClass = {
99 js_Math_str,
100 JSCLASS_HAS_CACHED_PROTO(JSProto_Math),
101 JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
102 JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
103 JSCLASS_NO_OPTIONAL_MEMBERS
104 };
105
106 static JSBool
107 math_abs(JSContext *cx, uintN argc, jsval *vp)
108 {
109 jsdouble x, z;
110
111 if (argc == 0) {
112 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
113 return JS_TRUE;
114 }
115 x = js_ValueToNumber(cx, &vp[2]);
116 if (JSVAL_IS_NULL(vp[2]))
117 return JS_FALSE;
118 z = fabs(x);
119 return js_NewNumberInRootedValue(cx, z, vp);
120 }
121
122 static JSBool
123 math_acos(JSContext *cx, uintN argc, jsval *vp)
124 {
125 jsdouble x, z;
126
127 if (argc == 0) {
128 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
129 return JS_TRUE;
130 }
131 x = js_ValueToNumber(cx, &vp[2]);
132 if (JSVAL_IS_NULL(vp[2]))
133 return JS_FALSE;
134 #if defined(SOLARIS) && defined(__GNUC__)
135 if (x < -1 || 1 < x) {
136 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
137 return JS_TRUE;
138 }
139 #endif
140 z = acos(x);
141 return js_NewNumberInRootedValue(cx, z, vp);
142 }
143
144 static JSBool
145 math_asin(JSContext *cx, uintN argc, jsval *vp)
146 {
147 jsdouble x, z;
148
149 if (argc == 0) {
150 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
151 return JS_TRUE;
152 }
153 x = js_ValueToNumber(cx, &vp[2]);
154 if (JSVAL_IS_NULL(vp[2]))
155 return JS_FALSE;
156 #if defined(SOLARIS) && defined(__GNUC__)
157 if (x < -1 || 1 < x) {
158 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
159 return JS_TRUE;
160 }
161 #endif
162 z = asin(x);
163 return js_NewNumberInRootedValue(cx, z, vp);
164 }
165
166 static JSBool
167 math_atan(JSContext *cx, uintN argc, jsval *vp)
168 {
169 jsdouble x, z;
170
171 if (argc == 0) {
172 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
173 return JS_TRUE;
174 }
175 x = js_ValueToNumber(cx, &vp[2]);
176 if (JSVAL_IS_NULL(vp[2]))
177 return JS_FALSE;
178 z = atan(x);
179 return js_NewNumberInRootedValue(cx, z, vp);
180 }
181
182 static JSBool
183 math_atan2(JSContext *cx, uintN argc, jsval *vp)
184 {
185 jsdouble x, y, z;
186
187 if (argc <= 1) {
188 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
189 return JS_TRUE;
190 }
191 x = js_ValueToNumber(cx, &vp[2]);
192 if (JSVAL_IS_NULL(vp[2]))
193 return JS_FALSE;
194 y = js_ValueToNumber(cx, &vp[3]);
195 if (JSVAL_IS_NULL(vp[3]))
196 return JS_FALSE;
197 #if defined(_MSC_VER)
198 /*
199 * MSVC's atan2 does not yield the result demanded by ECMA when both x
200 * and y are infinite.
201 * - The result is a multiple of pi/4.
202 * - The sign of x determines the sign of the result.
203 * - The sign of y determines the multiplicator, 1 or 3.
204 */
205 if (JSDOUBLE_IS_INFINITE(x) && JSDOUBLE_IS_INFINITE(y)) {
206 z = js_copysign(M_PI / 4, x);
207 if (y < 0)
208 z *= 3;
209 return js_NewDoubleInRootedValue(cx, z, vp);
210 }
211 #endif
212
213 #if defined(SOLARIS) && defined(__GNUC__)
214 if (x == 0) {
215 if (JSDOUBLE_IS_NEGZERO(y)) {
216 z = js_copysign(M_PI, x);
217 return js_NewDoubleInRootedValue(cx, z, vp);
218 }
219 if (y == 0) {
220 z = x;
221 return js_NewDoubleInRootedValue(cx, z, vp);
222 }
223 }
224 #endif
225 z = atan2(x, y);
226 return js_NewNumberInRootedValue(cx, z, vp);
227 }
228
229 static JSBool
230 math_ceil(JSContext *cx, uintN argc, jsval *vp)
231 {
232 jsdouble x, z;
233
234 if (argc == 0) {
235 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
236 return JS_TRUE;
237 }
238 x = js_ValueToNumber(cx, &vp[2]);
239 if (JSVAL_IS_NULL(vp[2]))
240 return JS_FALSE;
241 z = ceil(x);
242 return js_NewNumberInRootedValue(cx, z, vp);
243 }
244
245 static JSBool
246 math_cos(JSContext *cx, uintN argc, jsval *vp)
247 {
248 jsdouble x, z;
249
250 if (argc == 0) {
251 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
252 return JS_TRUE;
253 }
254 x = js_ValueToNumber(cx, &vp[2]);
255 if (JSVAL_IS_NULL(vp[2]))
256 return JS_FALSE;
257 z = cos(x);
258 return js_NewNumberInRootedValue(cx, z, vp);
259 }
260
261 static JSBool
262 math_exp(JSContext *cx, uintN argc, jsval *vp)
263 {
264 jsdouble x, z;
265
266 if (argc == 0) {
267 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
268 return JS_TRUE;
269 }
270 x = js_ValueToNumber(cx, &vp[2]);
271 if (JSVAL_IS_NULL(vp[2]))
272 return JS_FALSE;
273 #ifdef _WIN32
274 if (!JSDOUBLE_IS_NaN(x)) {
275 if (x == *cx->runtime->jsPositiveInfinity) {
276 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsPositiveInfinity);
277 return JS_TRUE;
278 }
279 if (x == *cx->runtime->jsNegativeInfinity) {
280 *vp = JSVAL_ZERO;
281 return JS_TRUE;
282 }
283 }
284 #endif
285 z = exp(x);
286 return js_NewNumberInRootedValue(cx, z, vp);
287 }
288
289 static JSBool
290 math_floor(JSContext *cx, uintN argc, jsval *vp)
291 {
292 jsdouble x, z;
293
294 if (argc == 0) {
295 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
296 return JS_TRUE;
297 }
298 x = js_ValueToNumber(cx, &vp[2]);
299 if (JSVAL_IS_NULL(vp[2]))
300 return JS_FALSE;
301 z = floor(x);
302 return js_NewNumberInRootedValue(cx, z, vp);
303 }
304
305 static JSBool
306 math_log(JSContext *cx, uintN argc, jsval *vp)
307 {
308 jsdouble x, z;
309
310 if (argc == 0) {
311 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
312 return JS_TRUE;
313 }
314 x = js_ValueToNumber(cx, &vp[2]);
315 if (JSVAL_IS_NULL(vp[2]))
316 return JS_FALSE;
317 #if defined(SOLARIS) && defined(__GNUC__)
318 if (x < 0) {
319 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
320 return JS_TRUE;
321 }
322 #endif
323 z = log(x);
324 return js_NewNumberInRootedValue(cx, z, vp);
325 }
326
327 static JSBool
328 math_max(JSContext *cx, uintN argc, jsval *vp)
329 {
330 jsdouble x, z = *cx->runtime->jsNegativeInfinity;
331 jsval *argv;
332 uintN i;
333
334 if (argc == 0) {
335 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNegativeInfinity);
336 return JS_TRUE;
337 }
338 argv = vp + 2;
339 for (i = 0; i < argc; i++) {
340 x = js_ValueToNumber(cx, &argv[i]);
341 if (JSVAL_IS_NULL(argv[i]))
342 return JS_FALSE;
343 if (JSDOUBLE_IS_NaN(x)) {
344 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
345 return JS_TRUE;
346 }
347 if (x == 0 && x == z) {
348 if (js_copysign(1.0, z) == -1)
349 z = x;
350 } else {
351 z = (x > z) ? x : z;
352 }
353 }
354 return js_NewNumberInRootedValue(cx, z, vp);
355 }
356
357 static JSBool
358 math_min(JSContext *cx, uintN argc, jsval *vp)
359 {
360 jsdouble x, z = *cx->runtime->jsPositiveInfinity;
361 jsval *argv;
362 uintN i;
363
364 if (argc == 0) {
365 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsPositiveInfinity);
366 return JS_TRUE;
367 }
368 argv = vp + 2;
369 for (i = 0; i < argc; i++) {
370 x = js_ValueToNumber(cx, &argv[i]);
371 if (JSVAL_IS_NULL(argv[i]))
372 return JS_FALSE;
373 if (JSDOUBLE_IS_NaN(x)) {
374 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
375 return JS_TRUE;
376 }
377 if (x == 0 && x == z) {
378 if (js_copysign(1.0, x) == -1)
379 z = x;
380 } else {
381 z = (x < z) ? x : z;
382 }
383 }
384 return js_NewNumberInRootedValue(cx, z, vp);
385 }
386
387 static JSBool
388 math_pow(JSContext *cx, uintN argc, jsval *vp)
389 {
390 jsdouble x, y, z;
391
392 if (argc <= 1) {
393 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
394 return JS_TRUE;
395 }
396 x = js_ValueToNumber(cx, &vp[2]);
397 if (JSVAL_IS_NULL(vp[2]))
398 return JS_FALSE;
399 y = js_ValueToNumber(cx, &vp[3]);
400 if (JSVAL_IS_NULL(vp[3]))
401 return JS_FALSE;
402 /*
403 * Because C99 and ECMA specify different behavior for pow(),
404 * we need to wrap the libm call to make it ECMA compliant.
405 */
406 if (!JSDOUBLE_IS_FINITE(y) && (x == 1.0 || x == -1.0)) {
407 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
408 return JS_TRUE;
409 }
410 /* pow(x, +-0) is always 1, even for x = NaN. */
411 if (y == 0) {
412 *vp = JSVAL_ONE;
413 return JS_TRUE;
414 }
415 z = pow(x, y);
416 return js_NewNumberInRootedValue(cx, z, vp);
417 }
418
419 /*
420 * Math.random() support, lifted from java.util.Random.java.
421 */
422 static void
423 random_setSeed(JSRuntime *rt, int64 seed)
424 {
425 int64 tmp;
426
427 JSLL_I2L(tmp, 1000);
428 JSLL_DIV(seed, seed, tmp);
429 JSLL_XOR(tmp, seed, rt->rngMultiplier);
430 JSLL_AND(rt->rngSeed, tmp, rt->rngMask);
431 }
432
433 void
434 js_random_init(JSRuntime *rt)
435 {
436 int64 tmp, tmp2;
437
438 /* Do at most once. */
439 if (rt->rngInitialized)
440 return;
441 rt->rngInitialized = JS_TRUE;
442
443 /* rt->rngMultiplier = 0x5DEECE66DL */
444 JSLL_ISHL(tmp, 0x5, 32);
445 JSLL_UI2L(tmp2, 0xDEECE66DL);
446 JSLL_OR(rt->rngMultiplier, tmp, tmp2);
447
448 /* rt->rngAddend = 0xBL */
449 JSLL_I2L(rt->rngAddend, 0xBL);
450
451 /* rt->rngMask = (1L << 48) - 1 */
452 JSLL_I2L(tmp, 1);
453 JSLL_SHL(tmp2, tmp, 48);
454 JSLL_SUB(rt->rngMask, tmp2, tmp);
455
456 /* rt->rngDscale = (jsdouble)(1L << 53) */
457 JSLL_SHL(tmp2, tmp, 53);
458 JSLL_L2D(rt->rngDscale, tmp2);
459
460 /* Finally, set the seed from current time. */
461 random_setSeed(rt, PRMJ_Now());
462 }
463
464 static uint32
465 random_next(JSRuntime *rt, int bits)
466 {
467 int64 nextseed, tmp;
468 uint32 retval;
469
470 JSLL_MUL(nextseed, rt->rngSeed, rt->rngMultiplier);
471 JSLL_ADD(nextseed, nextseed, rt->rngAddend);
472 JSLL_AND(nextseed, nextseed, rt->rngMask);
473 rt->rngSeed = nextseed;
474 JSLL_USHR(tmp, nextseed, 48 - bits);
475 JSLL_L2I(retval, tmp);
476 return retval;
477 }
478
479 jsdouble
480 js_random_nextDouble(JSRuntime *rt)
481 {
482 int64 tmp, tmp2;
483 jsdouble d;
484
485 JSLL_ISHL(tmp, random_next(rt, 26), 27);
486 JSLL_UI2L(tmp2, random_next(rt, 27));
487 JSLL_ADD(tmp, tmp, tmp2);
488 JSLL_L2D(d, tmp);
489 return d / rt->rngDscale;
490 }
491
492 static JSBool
493 math_random(JSContext *cx, uintN argc, jsval *vp)
494 {
495 JSRuntime *rt;
496 jsdouble z;
497
498 rt = cx->runtime;
499 JS_LOCK_RUNTIME(rt);
500 js_random_init(rt);
501 z = js_random_nextDouble(rt);
502 JS_UNLOCK_RUNTIME(rt);
503 return js_NewNumberInRootedValue(cx, z, vp);
504 }
505
506 #if defined _WIN32 && !defined WINCE && _MSC_VER < 1400
507 /* Try to work around apparent _copysign bustage in VC6 and VC7. */
508 double
509 js_copysign(double x, double y)
510 {
511 jsdpun xu, yu;
512
513 xu.d = x;
514 yu.d = y;
515 xu.s.hi &= ~JSDOUBLE_HI32_SIGNBIT;
516 xu.s.hi |= yu.s.hi & JSDOUBLE_HI32_SIGNBIT;
517 return xu.d;
518 }
519 #endif
520
521 static JSBool
522 math_round(JSContext *cx, uintN argc, jsval *vp)
523 {
524 jsdouble x, z;
525
526 if (argc == 0) {
527 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
528 return JS_TRUE;
529 }
530 x = js_ValueToNumber(cx, &vp[2]);
531 if (JSVAL_IS_NULL(vp[2]))
532 return JS_FALSE;
533 z = js_copysign(floor(x + 0.5), x);
534 return js_NewNumberInRootedValue(cx, z, vp);
535 }
536
537 static JSBool
538 math_sin(JSContext *cx, uintN argc, jsval *vp)
539 {
540 jsdouble x, z;
541
542 if (argc == 0) {
543 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
544 return JS_TRUE;
545 }
546 x = js_ValueToNumber(cx, &vp[2]);
547 if (JSVAL_IS_NULL(vp[2]))
548 return JS_FALSE;
549 z = sin(x);
550 return js_NewNumberInRootedValue(cx, z, vp);
551 }
552
553 static JSBool
554 math_sqrt(JSContext *cx, uintN argc, jsval *vp)
555 {
556 jsdouble x, z;
557
558 if (argc == 0) {
559 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
560 return JS_TRUE;
561 }
562 x = js_ValueToNumber(cx, &vp[2]);
563 if (JSVAL_IS_NULL(vp[2]))
564 return JS_FALSE;
565 z = sqrt(x);
566 return js_NewNumberInRootedValue(cx, z, vp);
567 }
568
569 static JSBool
570 math_tan(JSContext *cx, uintN argc, jsval *vp)
571 {
572 jsdouble x, z;
573
574 if (argc == 0) {
575 *vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
576 return JS_TRUE;
577 }
578 x = js_ValueToNumber(cx, &vp[2]);
579 if (JSVAL_IS_NULL(vp[2]))
580 return JS_FALSE;
581 z = tan(x);
582 return js_NewNumberInRootedValue(cx, z, vp);
583 }
584
585 #if JS_HAS_TOSOURCE
586 static JSBool
587 math_toSource(JSContext *cx, uintN argc, jsval *vp)
588 {
589 *vp = ATOM_KEY(CLASS_ATOM(cx, Math));
590 return JS_TRUE;
591 }
592 #endif
593
594 #ifdef JS_TRACER
595
596 #define MATH_BUILTIN_1(name) \
597 static jsdouble FASTCALL math_##name##_tn(jsdouble d) { return name(d); } \
598 JS_DEFINE_TRCINFO_1(math_##name, \
599 (1, (static, DOUBLE, math_##name##_tn, DOUBLE, 1, 1)))
600
601 MATH_BUILTIN_1(sin)
602 MATH_BUILTIN_1(cos)
603 MATH_BUILTIN_1(sqrt)
604 MATH_BUILTIN_1(floor)
605 MATH_BUILTIN_1(ceil)
606
607 static jsdouble FASTCALL
608 math_abs_tn(jsdouble d)
609 {
610 return fabs(d);
611 }
612
613 static jsdouble FASTCALL
614 math_log_tn(jsdouble d)
615 {
616 #if defined(SOLARIS) && defined(__GNUC__)
617 if (d < 0)
618 return js_NaN;
619 #endif
620 return log(d);
621 }
622
623 static jsdouble FASTCALL
624 math_max_tn(jsdouble d, jsdouble p)
625 {
626 if (JSDOUBLE_IS_NaN(d) || JSDOUBLE_IS_NaN(p))
627 return js_NaN;
628
629 if (p == 0 && p == d) {
630 if (js_copysign(1.0, d) == -1)
631 return p;
632 return d;
633 }
634 return (p > d) ? p : d;
635 }
636
637 static jsdouble FASTCALL
638 math_pow_tn(jsdouble d, jsdouble p)
639 {
640 if (!JSDOUBLE_IS_FINITE(p) && (d == 1.0 || d == -1.0))
641 return js_NaN;
642 if (p == 0)
643 return 1.0;
644 return pow(d, p);
645 }
646
647 static jsdouble FASTCALL
648 math_random_tn(JSRuntime* rt)
649 {
650 JS_LOCK_RUNTIME(rt);
651 js_random_init(rt);
652 jsdouble z = js_random_nextDouble(rt);
653 JS_UNLOCK_RUNTIME(rt);
654 return z;
655 }
656
657 static jsdouble FASTCALL
658 math_round_tn(jsdouble x)
659 {
660 return js_copysign(floor(x + 0.5), x);
661 }
662
663 JS_DEFINE_TRCINFO_1(math_abs,
664 (1, (static, DOUBLE, math_abs_tn, DOUBLE, 1, 1)))
665 JS_DEFINE_TRCINFO_1(math_log,
666 (1, (static, DOUBLE, math_log_tn, DOUBLE, 1, 1)))
667 JS_DEFINE_TRCINFO_1(math_max,
668 (2, (static, DOUBLE, math_max_tn, DOUBLE, DOUBLE, 1, 1)))
669 JS_DEFINE_TRCINFO_1(math_pow,
670 (2, (static, DOUBLE, math_pow_tn, DOUBLE, DOUBLE, 1, 1)))
671 JS_DEFINE_TRCINFO_1(math_random,
672 (1, (static, DOUBLE, math_random_tn, RUNTIME, 0, 0)))
673 JS_DEFINE_TRCINFO_1(math_round,
674 (1, (static, DOUBLE, math_round_tn, DOUBLE, 1, 1)))
675
676 #endif /* JS_TRACER */
677
678 static JSFunctionSpec math_static_methods[] = {
679 #if JS_HAS_TOSOURCE
680 JS_FN(js_toSource_str, math_toSource, 0, 0),
681 #endif
682 JS_TN("abs", math_abs, 1, 0, math_abs_trcinfo),
683 JS_FN("acos", math_acos, 1, 0),
684 JS_FN("asin", math_asin, 1, 0),
685 JS_FN("atan", math_atan, 1, 0),
686 JS_FN("atan2", math_atan2, 2, 0),
687 JS_TN("ceil", math_ceil, 1, 0, math_ceil_trcinfo),
688 JS_TN("cos", math_cos, 1, 0, math_cos_trcinfo),
689 JS_FN("exp", math_exp, 1, 0),
690 JS_TN("floor", math_floor, 1, 0, math_floor_trcinfo),
691 JS_TN("log", math_log, 1, 0, math_log_trcinfo),
692 JS_TN("max", math_max, 2, 0, math_max_trcinfo),
693 JS_FN("min", math_min, 2, 0),
694 JS_TN("pow", math_pow, 2, 0, math_pow_trcinfo),
695 JS_TN("random", math_random, 0, 0, math_random_trcinfo),
696 JS_TN("round", math_round, 1, 0, math_round_trcinfo),
697 JS_TN("sin", math_sin, 1, 0, math_sin_trcinfo),
698 JS_TN("sqrt", math_sqrt, 1, 0, math_sqrt_trcinfo),
699 JS_FN("tan", math_tan, 1, 0),
700 JS_FS_END
701 };
702
703 JSObject *
704 js_InitMathClass(JSContext *cx, JSObject *obj)
705 {
706 JSObject *Math;
707
708 Math = JS_NewObject(cx, &js_MathClass, NULL, obj);
709 if (!Math)
710 return NULL;
711 if (!JS_DefineProperty(cx, obj, js_Math_str, OBJECT_TO_JSVAL(Math),
712 JS_PropertyStub, JS_PropertyStub,
713 JSPROP_READONLY | JSPROP_PERMANENT))
714 return NULL;
715
716 if (!JS_DefineFunctions(cx, Math, math_static_methods))
717 return NULL;
718 if (!JS_DefineConstDoubles(cx, Math, math_constants))
719 return NULL;
720 return Math;
721 }

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