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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
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* |
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* ***** BEGIN LICENSE BLOCK ***** |
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1 |
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* |
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* The contents of this file are subject to the Mozilla Public License Version |
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* 1.1 (the "License"); you may not use this file except in compliance with |
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* the License. You may obtain a copy of the License at |
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* http://www.mozilla.org/MPL/ |
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* |
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* Software distributed under the License is distributed on an "AS IS" basis, |
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License |
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* for the specific language governing rights and limitations under the |
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* License. |
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* |
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* The Original Code is Mozilla Communicator client code, released |
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* March 31, 1998. |
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* |
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* The Initial Developer of the Original Code is |
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* Netscape Communications Corporation. |
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* Portions created by the Initial Developer are Copyright (C) 1998 |
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* the Initial Developer. All Rights Reserved. |
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* |
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* Contributor(s): |
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* |
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* Alternatively, the contents of this file may be used under the terms of |
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* either of the GNU General Public License Version 2 or later (the "GPL"), |
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), |
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* in which case the provisions of the GPL or the LGPL are applicable instead |
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* of those above. If you wish to allow use of your version of this file only |
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* under the terms of either the GPL or the LGPL, and not to allow others to |
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* use your version of this file under the terms of the MPL, indicate your |
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* decision by deleting the provisions above and replace them with the notice |
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* and other provisions required by the GPL or the LGPL. If you do not delete |
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* the provisions above, a recipient may use your version of this file under |
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* the terms of any one of the MPL, the GPL or the LGPL. |
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* |
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* ***** END LICENSE BLOCK ***** */ |
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|
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/* |
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* JS math package. |
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*/ |
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#include "jsstddef.h" |
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#include "jslibmath.h" |
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#include <stdlib.h> |
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#include "jstypes.h" |
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#include "jslong.h" |
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#include "prmjtime.h" |
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#include "jsapi.h" |
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#include "jsatom.h" |
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#include "jsbuiltins.h" |
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#include "jscntxt.h" |
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#include "jsversion.h" |
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#include "jslock.h" |
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#include "jsmath.h" |
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#include "jsnum.h" |
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#include "jsobj.h" |
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|
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extern jsdouble js_NaN; |
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|
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#ifndef M_E |
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#define M_E 2.7182818284590452354 |
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#endif |
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#ifndef M_LOG2E |
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#define M_LOG2E 1.4426950408889634074 |
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#endif |
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#ifndef M_LOG10E |
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#define M_LOG10E 0.43429448190325182765 |
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#endif |
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#ifndef M_LN2 |
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#define M_LN2 0.69314718055994530942 |
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#endif |
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#ifndef M_LN10 |
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#define M_LN10 2.30258509299404568402 |
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#endif |
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#ifndef M_PI |
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#define M_PI 3.14159265358979323846 |
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#endif |
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#ifndef M_SQRT2 |
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#define M_SQRT2 1.41421356237309504880 |
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#endif |
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#ifndef M_SQRT1_2 |
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#define M_SQRT1_2 0.70710678118654752440 |
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#endif |
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|
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static JSConstDoubleSpec math_constants[] = { |
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{M_E, "E", 0, {0,0,0}}, |
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{M_LOG2E, "LOG2E", 0, {0,0,0}}, |
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{M_LOG10E, "LOG10E", 0, {0,0,0}}, |
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{M_LN2, "LN2", 0, {0,0,0}}, |
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{M_LN10, "LN10", 0, {0,0,0}}, |
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{M_PI, "PI", 0, {0,0,0}}, |
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{M_SQRT2, "SQRT2", 0, {0,0,0}}, |
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{M_SQRT1_2, "SQRT1_2", 0, {0,0,0}}, |
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{0,0,0,{0,0,0}} |
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}; |
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|
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JSClass js_MathClass = { |
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js_Math_str, |
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JSCLASS_HAS_CACHED_PROTO(JSProto_Math), |
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JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, |
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JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub, |
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JSCLASS_NO_OPTIONAL_MEMBERS |
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}; |
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|
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static JSBool |
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math_abs(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, z; |
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|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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z = fabs(x); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
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|
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static JSBool |
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math_acos(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, z; |
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|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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#if defined(SOLARIS) && defined(__GNUC__) |
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if (x < -1 || 1 < x) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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#endif |
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z = acos(x); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
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|
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static JSBool |
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math_asin(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, z; |
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|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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#if defined(SOLARIS) && defined(__GNUC__) |
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if (x < -1 || 1 < x) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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#endif |
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z = asin(x); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
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|
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static JSBool |
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math_atan(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, z; |
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|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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z = atan(x); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
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|
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static JSBool |
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math_atan2(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, y, z; |
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|
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if (argc <= 1) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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y = js_ValueToNumber(cx, &vp[3]); |
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if (JSVAL_IS_NULL(vp[3])) |
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return JS_FALSE; |
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#if defined(_MSC_VER) |
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/* |
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* MSVC's atan2 does not yield the result demanded by ECMA when both x |
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* and y are infinite. |
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* - The result is a multiple of pi/4. |
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* - The sign of x determines the sign of the result. |
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* - The sign of y determines the multiplicator, 1 or 3. |
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*/ |
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if (JSDOUBLE_IS_INFINITE(x) && JSDOUBLE_IS_INFINITE(y)) { |
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z = js_copysign(M_PI / 4, x); |
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if (y < 0) |
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z *= 3; |
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return js_NewDoubleInRootedValue(cx, z, vp); |
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} |
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#endif |
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|
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#if defined(SOLARIS) && defined(__GNUC__) |
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if (x == 0) { |
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if (JSDOUBLE_IS_NEGZERO(y)) { |
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z = js_copysign(M_PI, x); |
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return js_NewDoubleInRootedValue(cx, z, vp); |
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} |
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if (y == 0) { |
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z = x; |
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return js_NewDoubleInRootedValue(cx, z, vp); |
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} |
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} |
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#endif |
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z = atan2(x, y); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
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|
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static JSBool |
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math_ceil(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, z; |
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|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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z = ceil(x); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
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|
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static JSBool |
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math_cos(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, z; |
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|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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z = cos(x); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
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|
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static JSBool |
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math_exp(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, z; |
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|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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#ifdef _WIN32 |
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if (!JSDOUBLE_IS_NaN(x)) { |
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if (x == *cx->runtime->jsPositiveInfinity) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsPositiveInfinity); |
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return JS_TRUE; |
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} |
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if (x == *cx->runtime->jsNegativeInfinity) { |
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*vp = JSVAL_ZERO; |
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return JS_TRUE; |
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} |
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} |
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#endif |
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z = exp(x); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
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|
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static JSBool |
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math_floor(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, z; |
| 293 |
|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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z = floor(x); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
| 304 |
|
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static JSBool |
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math_log(JSContext *cx, uintN argc, jsval *vp) |
| 307 |
{ |
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jsdouble x, z; |
| 309 |
|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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x = js_ValueToNumber(cx, &vp[2]); |
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if (JSVAL_IS_NULL(vp[2])) |
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return JS_FALSE; |
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#if defined(SOLARIS) && defined(__GNUC__) |
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if (x < 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
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} |
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#endif |
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z = log(x); |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
| 326 |
|
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static JSBool |
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math_max(JSContext *cx, uintN argc, jsval *vp) |
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{ |
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jsdouble x, z = *cx->runtime->jsNegativeInfinity; |
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jsval *argv; |
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uintN i; |
| 333 |
|
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if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNegativeInfinity); |
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return JS_TRUE; |
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} |
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argv = vp + 2; |
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for (i = 0; i < argc; i++) { |
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x = js_ValueToNumber(cx, &argv[i]); |
| 341 |
if (JSVAL_IS_NULL(argv[i])) |
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return JS_FALSE; |
| 343 |
if (JSDOUBLE_IS_NaN(x)) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsNaN); |
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return JS_TRUE; |
| 346 |
} |
| 347 |
if (x == 0 && x == z) { |
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if (js_copysign(1.0, z) == -1) |
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z = x; |
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} else { |
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z = (x > z) ? x : z; |
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} |
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} |
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return js_NewNumberInRootedValue(cx, z, vp); |
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} |
| 356 |
|
| 357 |
static JSBool |
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math_min(JSContext *cx, uintN argc, jsval *vp) |
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{ |
| 360 |
jsdouble x, z = *cx->runtime->jsPositiveInfinity; |
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jsval *argv; |
| 362 |
uintN i; |
| 363 |
|
| 364 |
if (argc == 0) { |
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*vp = DOUBLE_TO_JSVAL(cx->runtime->jsPositiveInfinity); |
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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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