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Diffstat (limited to 'js/src/jsmath.cpp')
| -rw-r--r-- | js/src/jsmath.cpp | 885 |
1 files changed, 885 insertions, 0 deletions
diff --git a/js/src/jsmath.cpp b/js/src/jsmath.cpp new file mode 100644 index 0000000..352dead --- /dev/null +++ b/js/src/jsmath.cpp @@ -0,0 +1,885 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * + * ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is Mozilla Communicator client code, released + * March 31, 1998. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1998 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either of the GNU General Public License Version 2 or later (the "GPL"), + * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +/* + * JS math package. + */ +#include <stdlib.h> +#include "jstypes.h" +#include "jsstdint.h" +#include "jslong.h" +#include "prmjtime.h" +#include "jsapi.h" +#include "jsatom.h" +#include "jsbuiltins.h" +#include "jscntxt.h" +#include "jsversion.h" +#include "jslock.h" +#include "jsmath.h" +#include "jsnum.h" +#include "jslibmath.h" +#include "jscompartment.h" + +using namespace js; + +#ifndef M_E +#define M_E 2.7182818284590452354 +#endif +#ifndef M_LOG2E +#define M_LOG2E 1.4426950408889634074 +#endif +#ifndef M_LOG10E +#define M_LOG10E 0.43429448190325182765 +#endif +#ifndef M_LN2 +#define M_LN2 0.69314718055994530942 +#endif +#ifndef M_LN10 +#define M_LN10 2.30258509299404568402 +#endif +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif +#ifndef M_SQRT2 +#define M_SQRT2 1.41421356237309504880 +#endif +#ifndef M_SQRT1_2 +#define M_SQRT1_2 0.70710678118654752440 +#endif + +static JSConstDoubleSpec math_constants[] = { + {M_E, "E", 0, {0,0,0}}, + {M_LOG2E, "LOG2E", 0, {0,0,0}}, + {M_LOG10E, "LOG10E", 0, {0,0,0}}, + {M_LN2, "LN2", 0, {0,0,0}}, + {M_LN10, "LN10", 0, {0,0,0}}, + {M_PI, "PI", 0, {0,0,0}}, + {M_SQRT2, "SQRT2", 0, {0,0,0}}, + {M_SQRT1_2, "SQRT1_2", 0, {0,0,0}}, + {0,0,0,{0,0,0}} +}; + +MathCache::MathCache() { + memset(table, 0, sizeof(table)); + + /* See comments in lookup(). */ + JS_ASSERT(JSDOUBLE_IS_NEGZERO(-0.0)); + JS_ASSERT(!JSDOUBLE_IS_NEGZERO(+0.0)); + JS_ASSERT(hash(-0.0) != hash(+0.0)); +} + +Class js_MathClass = { + js_Math_str, + JSCLASS_HAS_CACHED_PROTO(JSProto_Math), + PropertyStub, /* addProperty */ + PropertyStub, /* delProperty */ + PropertyStub, /* getProperty */ + StrictPropertyStub, /* setProperty */ + EnumerateStub, + ResolveStub, + ConvertStub +}; + +JSBool +js_math_abs(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + z = fabs(x); + vp->setNumber(z); + return JS_TRUE; +} + +static JSBool +math_acos(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; +#if defined(SOLARIS) && defined(__GNUC__) + if (x < -1 || 1 < x) { + vp->setDouble(js_NaN); + return JS_TRUE; + } +#endif + MathCache *mathCache = GetMathCache(cx); + if (!mathCache) + return JS_FALSE; + z = mathCache->lookup(acos, x); + vp->setDouble(z); + return JS_TRUE; +} + +static JSBool +math_asin(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; +#if defined(SOLARIS) && defined(__GNUC__) + if (x < -1 || 1 < x) { + vp->setDouble(js_NaN); + return JS_TRUE; + } +#endif + MathCache *mathCache = GetMathCache(cx); + if (!mathCache) + return JS_FALSE; + z = mathCache->lookup(asin, x); + vp->setDouble(z); + return JS_TRUE; +} + +static JSBool +math_atan(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + MathCache *mathCache = GetMathCache(cx); + if (!mathCache) + return JS_FALSE; + z = mathCache->lookup(atan, x); + vp->setDouble(z); + return JS_TRUE; +} + +static inline jsdouble JS_FASTCALL +math_atan2_kernel(jsdouble x, jsdouble y) +{ +#if defined(_MSC_VER) + /* + * MSVC's atan2 does not yield the result demanded by ECMA when both x + * and y are infinite. + * - The result is a multiple of pi/4. + * - The sign of x determines the sign of the result. + * - The sign of y determines the multiplicator, 1 or 3. + */ + if (JSDOUBLE_IS_INFINITE(x) && JSDOUBLE_IS_INFINITE(y)) { + jsdouble z = js_copysign(M_PI / 4, x); + if (y < 0) + z *= 3; + return z; + } +#endif + +#if defined(SOLARIS) && defined(__GNUC__) + if (x == 0) { + if (JSDOUBLE_IS_NEGZERO(y)) + return js_copysign(M_PI, x); + if (y == 0) + return x; + } +#endif + return atan2(x, y); +} + +static JSBool +math_atan2(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, y, z; + + if (argc <= 1) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + if (!ValueToNumber(cx, vp[3], &y)) + return JS_FALSE; + z = math_atan2_kernel(x, y); + vp->setDouble(z); + return JS_TRUE; +} + +jsdouble +js_math_ceil_impl(jsdouble x) +{ +#ifdef __APPLE__ + if (x < 0 && x > -1.0) + return js_copysign(0, -1); +#endif + return ceil(x); +} + +JSBool +js_math_ceil(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + z = js_math_ceil_impl(x); + vp->setNumber(z); + return JS_TRUE; +} + +static JSBool +math_cos(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + MathCache *mathCache = GetMathCache(cx); + if (!mathCache) + return JS_FALSE; + z = mathCache->lookup(cos, x); + vp->setDouble(z); + return JS_TRUE; +} + +static double +math_exp_body(double d) +{ +#ifdef _WIN32 + if (!JSDOUBLE_IS_NaN(d)) { + if (d == js_PositiveInfinity) + return js_PositiveInfinity; + if (d == js_NegativeInfinity) + return 0.0; + } +#endif + return exp(d); +} + +static JSBool +math_exp(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + MathCache *mathCache = GetMathCache(cx); + if (!mathCache) + return JS_FALSE; + z = mathCache->lookup(math_exp_body, x); + vp->setNumber(z); + return JS_TRUE; +} + +jsdouble +js_math_floor_impl(jsdouble x) +{ + return floor(x); +} + +JSBool +js_math_floor(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + z = js_math_floor_impl(x); + vp->setNumber(z); + return JS_TRUE; +} + +static JSBool +math_log(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; +#if defined(SOLARIS) && defined(__GNUC__) + if (x < 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } +#endif + MathCache *mathCache = GetMathCache(cx); + if (!mathCache) + return JS_FALSE; + z = mathCache->lookup(log, x); + vp->setNumber(z); + return JS_TRUE; +} + +JSBool +js_math_max(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z = js_NegativeInfinity; + Value *argv; + uintN i; + + if (argc == 0) { + vp->setDouble(js_NegativeInfinity); + return JS_TRUE; + } + argv = vp + 2; + for (i = 0; i < argc; i++) { + if (!ValueToNumber(cx, argv[i], &x)) + return JS_FALSE; + if (JSDOUBLE_IS_NaN(x)) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (x == 0 && x == z) { + if (js_copysign(1.0, z) == -1) + z = x; + } else { + z = (x > z) ? x : z; + } + } + vp->setNumber(z); + return JS_TRUE; +} + +JSBool +js_math_min(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z = js_PositiveInfinity; + Value *argv; + uintN i; + + if (argc == 0) { + vp->setDouble(js_PositiveInfinity); + return JS_TRUE; + } + argv = vp + 2; + for (i = 0; i < argc; i++) { + if (!ValueToNumber(cx, argv[i], &x)) + return JS_FALSE; + if (JSDOUBLE_IS_NaN(x)) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (x == 0 && x == z) { + if (js_copysign(1.0, x) == -1) + z = x; + } else { + z = (x < z) ? x : z; + } + } + vp->setNumber(z); + return JS_TRUE; +} + +static jsdouble +powi(jsdouble x, jsint y) +{ + jsuint n = (y < 0) ? -y : y; + jsdouble m = x; + jsdouble p = 1; + while (true) { + if ((n & 1) != 0) p *= m; + n >>= 1; + if (n == 0) { + if (y < 0) { + // Unfortunately, we have to be careful when p has reached + // infinity in the computation, because sometimes the higher + // internal precision in the pow() implementation would have + // given us a finite p. This happens very rarely. + + jsdouble result = 1.0 / p; + return (result == 0 && JSDOUBLE_IS_INFINITE(p)) + ? pow(x, static_cast<jsdouble>(y)) // Avoid pow(double, int). + : result; + } + + return p; + } + m *= m; + } +} + +static JSBool +math_pow(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, y, z; + + if (argc <= 1) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + if (!ValueToNumber(cx, vp[3], &y)) + return JS_FALSE; + /* + * Special case for square roots. Note that pow(x, 0.5) != sqrt(x) + * when x = -0.0, so we have to guard for this. + */ + if (JSDOUBLE_IS_FINITE(x) && x != 0.0) { + if (y == 0.5) { + vp->setNumber(sqrt(x)); + return JS_TRUE; + } + if (y == -0.5) { + vp->setNumber(1.0/sqrt(x)); + return JS_TRUE; + } + } + /* + * Because C99 and ECMA specify different behavior for pow(), + * we need to wrap the libm call to make it ECMA compliant. + */ + if (!JSDOUBLE_IS_FINITE(y) && (x == 1.0 || x == -1.0)) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + /* pow(x, +-0) is always 1, even for x = NaN. */ + if (y == 0) { + vp->setInt32(1); + return JS_TRUE; + } + + if (vp[3].isInt32()) + z = powi(x, vp[3].toInt32()); + else + z = pow(x, y); + + vp->setNumber(z); + return JS_TRUE; +} + +static const int64 RNG_MULTIPLIER = 0x5DEECE66DLL; +static const int64 RNG_ADDEND = 0xBLL; +static const int64 RNG_MASK = (1LL << 48) - 1; +static const jsdouble RNG_DSCALE = jsdouble(1LL << 53); + +/* + * Math.random() support, lifted from java.util.Random.java. + */ +static inline void +random_setSeed(JSContext *cx, int64 seed) +{ + cx->rngSeed = (seed ^ RNG_MULTIPLIER) & RNG_MASK; +} + +void +js_InitRandom(JSContext *cx) +{ + /* + * Set the seed from current time. Since we have a RNG per context and we often bring + * up several contexts at the same time, we xor in some additional values, namely + * the context and its successor. We don't just use the context because it might be + * possible to reverse engineer the context pointer if one guesses the time right. + */ + random_setSeed(cx, + (PRMJ_Now() / 1000) ^ + int64(cx) ^ + int64(cx->link.next)); +} + +static inline uint64 +random_next(JSContext *cx, int bits) +{ + uint64 nextseed = cx->rngSeed * RNG_MULTIPLIER; + nextseed += RNG_ADDEND; + nextseed &= RNG_MASK; + cx->rngSeed = nextseed; + return nextseed >> (48 - bits); +} + +static inline jsdouble +random_nextDouble(JSContext *cx) +{ + return jsdouble((random_next(cx, 26) << 27) + random_next(cx, 27)) / RNG_DSCALE; +} + +static JSBool +math_random(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble z = random_nextDouble(cx); + vp->setDouble(z); + return JS_TRUE; +} + +#if defined _WIN32 && !defined WINCE && _MSC_VER < 1400 +/* Try to work around apparent _copysign bustage in VC7.x. */ +double +js_copysign(double x, double y) +{ + jsdpun xu, yu; + + xu.d = x; + yu.d = y; + xu.s.hi &= ~JSDOUBLE_HI32_SIGNBIT; + xu.s.hi |= yu.s.hi & JSDOUBLE_HI32_SIGNBIT; + return xu.d; +} +#endif + +jsdouble +js_math_round_impl(jsdouble x) +{ + return js_copysign(floor(x + 0.5), x); +} + +JSBool +js_math_round(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + z = js_copysign(floor(x + 0.5), x); + vp->setNumber(z); + return JS_TRUE; +} + +static JSBool +math_sin(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + MathCache *mathCache = GetMathCache(cx); + if (!mathCache) + return JS_FALSE; + z = mathCache->lookup(sin, x); + vp->setDouble(z); + return JS_TRUE; +} + +static JSBool +math_sqrt(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + MathCache *mathCache = GetMathCache(cx); + if (!mathCache) + return JS_FALSE; + z = mathCache->lookup(sqrt, x); + vp->setDouble(z); + return JS_TRUE; +} + +static JSBool +math_tan(JSContext *cx, uintN argc, Value *vp) +{ + jsdouble x, z; + + if (argc == 0) { + vp->setDouble(js_NaN); + return JS_TRUE; + } + if (!ValueToNumber(cx, vp[2], &x)) + return JS_FALSE; + MathCache *mathCache = GetMathCache(cx); + if (!mathCache) + return JS_FALSE; + z = mathCache->lookup(tan, x); + vp->setDouble(z); + return JS_TRUE; +} + +#if JS_HAS_TOSOURCE +static JSBool +math_toSource(JSContext *cx, uintN argc, Value *vp) +{ + vp->setString(ATOM_TO_STRING(CLASS_ATOM(cx, Math))); + return JS_TRUE; +} +#endif + +#ifdef JS_TRACER + +#define MATH_BUILTIN_1(name, cfun) \ + static jsdouble FASTCALL name##_tn(MathCache *cache, jsdouble d) { \ + return cache->lookup(cfun, d); \ + } \ + JS_DEFINE_TRCINFO_1(name, \ + (2, (static, DOUBLE, name##_tn, MATHCACHE, DOUBLE, 1, nanojit::ACCSET_NONE))) + +MATH_BUILTIN_1(js_math_abs, fabs) +MATH_BUILTIN_1(math_atan, atan) +MATH_BUILTIN_1(math_sin, sin) +MATH_BUILTIN_1(math_cos, cos) +MATH_BUILTIN_1(math_sqrt, sqrt) +MATH_BUILTIN_1(math_tan, tan) + +static jsdouble FASTCALL +math_acos_tn(MathCache *cache, jsdouble d) +{ +#if defined(SOLARIS) && defined(__GNUC__) + if (d < -1 || 1 < d) { + return js_NaN; + } +#endif + return cache->lookup(acos, d); +} + +static jsdouble FASTCALL +math_asin_tn(MathCache *cache, jsdouble d) +{ +#if defined(SOLARIS) && defined(__GNUC__) + if (d < -1 || 1 < d) { + return js_NaN; + } +#endif + return cache->lookup(asin, d); +} + +static jsdouble FASTCALL +math_exp_tn(MathCache *cache, jsdouble d) +{ + return cache->lookup(math_exp_body, d); +} + +JS_DEFINE_TRCINFO_1(math_exp, + (2, (static, DOUBLE, math_exp_tn, MATHCACHE, DOUBLE, 1, nanojit::ACCSET_NONE))) + +static jsdouble FASTCALL +math_log_tn(MathCache *cache, jsdouble d) +{ +#if defined(SOLARIS) && defined(__GNUC__) + if (d < 0) + return js_NaN; +#endif + return cache->lookup(log, d); +} + +static jsdouble FASTCALL +math_max_tn(jsdouble d, jsdouble p) +{ + if (JSDOUBLE_IS_NaN(d) || JSDOUBLE_IS_NaN(p)) + return js_NaN; + + if (p == 0 && p == d) { + // Max prefers 0.0 to -0.0. + if (js_copysign(1.0, d) == -1) + return p; + return d; + } + return (p > d) ? p : d; +} + +static jsdouble FASTCALL +math_min_tn(jsdouble d, jsdouble p) +{ + if (JSDOUBLE_IS_NaN(d) || JSDOUBLE_IS_NaN(p)) + return js_NaN; + + if (p == 0 && p == d) { + // Min prefers -0.0 to 0.0. + if (js_copysign (1.0, p) == -1) + return p; + return d; + } + return (p < d) ? p : d; +} + +static jsdouble FASTCALL +math_pow_tn(jsdouble d, jsdouble p) +{ + /* + * Special case for square roots. Note that pow(x, 0.5) != sqrt(x) + * when x = -0.0, so we have to guard for this. + */ + if (JSDOUBLE_IS_FINITE(d) && d != 0.0) { + if (p == 0.5) + return sqrt(d); + + if (p == -0.5) + return 1.0/sqrt(d); + } + if (!JSDOUBLE_IS_FINITE(p) && (d == 1.0 || d == -1.0)) + return js_NaN; + if (p == 0) + return 1.0; + int32_t i; + if (JSDOUBLE_IS_INT32(p, &i)) + return powi(d, i); + + return pow(d, p); +} + +static jsdouble FASTCALL +math_random_tn(JSContext *cx) +{ + return random_nextDouble(cx); +} + +static jsdouble FASTCALL +math_round_tn(jsdouble x) +{ + return js_math_round_impl(x); +} + +static jsdouble FASTCALL +math_ceil_tn(jsdouble x) +{ + return js_math_ceil_impl(x); +} + +static jsdouble FASTCALL +math_floor_tn(jsdouble x) +{ + return js_math_floor_impl(x); +} + +JS_DEFINE_TRCINFO_1(math_acos, + (2, (static, DOUBLE, math_acos_tn, MATHCACHE, DOUBLE, 1, nanojit::ACCSET_NONE))) +JS_DEFINE_TRCINFO_1(math_asin, + (2, (static, DOUBLE, math_asin_tn, MATHCACHE, DOUBLE, 1, nanojit::ACCSET_NONE))) +JS_DEFINE_TRCINFO_1(math_atan2, + (2, (static, DOUBLE, math_atan2_kernel, DOUBLE, DOUBLE, 1, nanojit::ACCSET_NONE))) +JS_DEFINE_TRCINFO_1(js_math_floor, + (1, (static, DOUBLE, math_floor_tn, DOUBLE, 1, nanojit::ACCSET_NONE))) +JS_DEFINE_TRCINFO_1(math_log, + (2, (static, DOUBLE, math_log_tn, MATHCACHE, DOUBLE, 1, nanojit::ACCSET_NONE))) +JS_DEFINE_TRCINFO_1(js_math_max, + (2, (static, DOUBLE, math_max_tn, DOUBLE, DOUBLE, 1, nanojit::ACCSET_NONE))) +JS_DEFINE_TRCINFO_1(js_math_min, + (2, (static, DOUBLE, math_min_tn, DOUBLE, DOUBLE, 1, nanojit::ACCSET_NONE))) +JS_DEFINE_TRCINFO_1(math_pow, + (2, (static, DOUBLE, math_pow_tn, DOUBLE, DOUBLE, 1, nanojit::ACCSET_NONE))) +JS_DEFINE_TRCINFO_1(math_random, + (1, (static, DOUBLE, math_random_tn, CONTEXT, 0, nanojit::ACCSET_STORE_ANY))) +JS_DEFINE_TRCINFO_1(js_math_round, + (1, (static, DOUBLE, math_round_tn, DOUBLE, 1, nanojit::ACCSET_NONE))) +JS_DEFINE_TRCINFO_1(js_math_ceil, + (1, (static, DOUBLE, math_ceil_tn, DOUBLE, 1, nanojit::ACCSET_NONE))) + +#endif /* JS_TRACER */ + +static JSFunctionSpec math_static_methods[] = { +#if JS_HAS_TOSOURCE + JS_FN(js_toSource_str, math_toSource, 0, 0), +#endif + JS_TN("abs", js_math_abs, 1, 0, &js_math_abs_trcinfo), + JS_TN("acos", math_acos, 1, 0, &math_acos_trcinfo), + JS_TN("asin", math_asin, 1, 0, &math_asin_trcinfo), + JS_TN("atan", math_atan, 1, 0, &math_atan_trcinfo), + JS_TN("atan2", math_atan2, 2, 0, &math_atan2_trcinfo), + JS_TN("ceil", js_math_ceil, 1, 0, &js_math_ceil_trcinfo), + JS_TN("cos", math_cos, 1, 0, &math_cos_trcinfo), + JS_TN("exp", math_exp, 1, 0, &math_exp_trcinfo), + JS_TN("floor", js_math_floor, 1, 0, &js_math_floor_trcinfo), + JS_TN("log", math_log, 1, 0, &math_log_trcinfo), + JS_TN("max", js_math_max, 2, 0, &js_math_max_trcinfo), + JS_TN("min", js_math_min, 2, 0, &js_math_min_trcinfo), + JS_TN("pow", math_pow, 2, 0, &math_pow_trcinfo), + JS_TN("random", math_random, 0, 0, &math_random_trcinfo), + JS_TN("round", js_math_round, 1, 0, &js_math_round_trcinfo), + JS_TN("sin", math_sin, 1, 0, &math_sin_trcinfo), + JS_TN("sqrt", math_sqrt, 1, 0, &math_sqrt_trcinfo), + JS_TN("tan", math_tan, 1, 0, &math_tan_trcinfo), + JS_FS_END +}; + +bool +js_IsMathFunction(JSNative native) +{ + for (size_t i=0; math_static_methods[i].name != NULL; i++) { + if (native == math_static_methods[i].call) + return true; + } + return false; +} + +JSObject * +js_InitMathClass(JSContext *cx, JSObject *obj) +{ + JSObject *Math; + + Math = JS_NewObject(cx, Jsvalify(&js_MathClass), NULL, obj); + if (!Math) + return NULL; + if (!JS_DefineProperty(cx, obj, js_Math_str, OBJECT_TO_JSVAL(Math), + JS_PropertyStub, JS_StrictPropertyStub, 0)) { + return NULL; + } + + if (!JS_DefineFunctions(cx, Math, math_static_methods)) + return NULL; + if (!JS_DefineConstDoubles(cx, Math, math_constants)) + return NULL; + return Math; +} |