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add js to tree
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3693 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Brian West
469
libs/js/src/jsmath.c
Normal file
469
libs/js/src/jsmath.c
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@@ -0,0 +1,469 @@
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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
|
||||
* 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.
|
||||
*
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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
|
||||
* 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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||||
* 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.
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||||
*
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||||
* ***** END LICENSE BLOCK ***** */
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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 "jscntxt.h"
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#include "jsconfig.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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#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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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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static JSClass math_class = {
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"Math",
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0,
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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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static JSBool
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math_abs(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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z = fd_fabs(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_acos(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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z = fd_acos(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_asin(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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z = fd_asin(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_atan(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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z = fd_atan(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_atan2(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, y, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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if (!js_ValueToNumber(cx, argv[1], &y))
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return JS_FALSE;
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z = fd_atan2(x, y);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_ceil(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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z = fd_ceil(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_cos(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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z = fd_cos(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_exp(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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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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*rval = 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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*rval = 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 = fd_exp(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_floor(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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z = fd_floor(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_log(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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z = fd_log(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_max(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z = *cx->runtime->jsNegativeInfinity;
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uintN i;
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if (argc == 0) {
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*rval = DOUBLE_TO_JSVAL(cx->runtime->jsNegativeInfinity);
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return JS_TRUE;
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}
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for (i = 0; i < argc; i++) {
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if (!js_ValueToNumber(cx, argv[i], &x))
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return JS_FALSE;
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if (JSDOUBLE_IS_NaN(x)) {
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*rval = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
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return JS_TRUE;
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}
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if ((x==0)&&(x==z)&&(fd_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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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_min(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, z = *cx->runtime->jsPositiveInfinity;
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uintN i;
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if (argc == 0) {
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*rval = DOUBLE_TO_JSVAL(cx->runtime->jsPositiveInfinity);
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return JS_TRUE;
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}
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for (i = 0; i < argc; i++) {
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if (!js_ValueToNumber(cx, argv[i], &x))
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return JS_FALSE;
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if (JSDOUBLE_IS_NaN(x)) {
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*rval = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
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return JS_TRUE;
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}
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if ((x==0)&&(x==z)&&(fd_copysign(1.0,x)==-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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return js_NewNumberValue(cx, z, rval);
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}
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static JSBool
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math_pow(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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jsdouble x, y, z;
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if (!js_ValueToNumber(cx, argv[0], &x))
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return JS_FALSE;
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if (!js_ValueToNumber(cx, argv[1], &y))
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return JS_FALSE;
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z = fd_pow(x, y);
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return js_NewNumberValue(cx, z, rval);
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}
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/*
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* Math.random() support, lifted from java.util.Random.java.
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*/
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static void
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random_setSeed(JSRuntime *rt, int64 seed)
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{
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int64 tmp;
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JSLL_I2L(tmp, 1000);
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JSLL_DIV(seed, seed, tmp);
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JSLL_XOR(tmp, seed, rt->rngMultiplier);
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JSLL_AND(rt->rngSeed, tmp, rt->rngMask);
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}
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static void
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random_init(JSRuntime *rt)
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{
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int64 tmp, tmp2;
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||||
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/* Do at most once. */
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if (rt->rngInitialized)
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return;
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rt->rngInitialized = JS_TRUE;
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||||
/* rt->rngMultiplier = 0x5DEECE66DL */
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JSLL_ISHL(tmp, 0x5, 32);
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JSLL_UI2L(tmp2, 0xDEECE66DL);
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JSLL_OR(rt->rngMultiplier, tmp, tmp2);
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||||
/* rt->rngAddend = 0xBL */
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||||
JSLL_I2L(rt->rngAddend, 0xBL);
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||||
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||||
/* rt->rngMask = (1L << 48) - 1 */
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||||
JSLL_I2L(tmp, 1);
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||||
JSLL_SHL(tmp2, tmp, 48);
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JSLL_SUB(rt->rngMask, tmp2, tmp);
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||||
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||||
/* rt->rngDscale = (jsdouble)(1L << 53) */
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||||
JSLL_SHL(tmp2, tmp, 53);
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||||
JSLL_L2D(rt->rngDscale, tmp2);
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||||
|
||||
/* Finally, set the seed from current time. */
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||||
random_setSeed(rt, PRMJ_Now());
|
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}
|
||||
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||||
static uint32
|
||||
random_next(JSRuntime *rt, int bits)
|
||||
{
|
||||
int64 nextseed, tmp;
|
||||
uint32 retval;
|
||||
|
||||
JSLL_MUL(nextseed, rt->rngSeed, rt->rngMultiplier);
|
||||
JSLL_ADD(nextseed, nextseed, rt->rngAddend);
|
||||
JSLL_AND(nextseed, nextseed, rt->rngMask);
|
||||
rt->rngSeed = nextseed;
|
||||
JSLL_USHR(tmp, nextseed, 48 - bits);
|
||||
JSLL_L2I(retval, tmp);
|
||||
return retval;
|
||||
}
|
||||
|
||||
static jsdouble
|
||||
random_nextDouble(JSRuntime *rt)
|
||||
{
|
||||
int64 tmp, tmp2;
|
||||
jsdouble d;
|
||||
|
||||
JSLL_ISHL(tmp, random_next(rt, 26), 27);
|
||||
JSLL_UI2L(tmp2, random_next(rt, 27));
|
||||
JSLL_ADD(tmp, tmp, tmp2);
|
||||
JSLL_L2D(d, tmp);
|
||||
return d / rt->rngDscale;
|
||||
}
|
||||
|
||||
static JSBool
|
||||
math_random(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
|
||||
{
|
||||
JSRuntime *rt;
|
||||
jsdouble z;
|
||||
|
||||
rt = cx->runtime;
|
||||
JS_LOCK_RUNTIME(rt);
|
||||
random_init(rt);
|
||||
z = random_nextDouble(rt);
|
||||
JS_UNLOCK_RUNTIME(rt);
|
||||
return js_NewNumberValue(cx, z, rval);
|
||||
}
|
||||
|
||||
static JSBool
|
||||
math_round(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
|
||||
{
|
||||
jsdouble x, z;
|
||||
|
||||
if (!js_ValueToNumber(cx, argv[0], &x))
|
||||
return JS_FALSE;
|
||||
z = fd_copysign(fd_floor(x + 0.5), x);
|
||||
return js_NewNumberValue(cx, z, rval);
|
||||
}
|
||||
|
||||
static JSBool
|
||||
math_sin(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
|
||||
{
|
||||
jsdouble x, z;
|
||||
|
||||
if (!js_ValueToNumber(cx, argv[0], &x))
|
||||
return JS_FALSE;
|
||||
z = fd_sin(x);
|
||||
return js_NewNumberValue(cx, z, rval);
|
||||
}
|
||||
|
||||
static JSBool
|
||||
math_sqrt(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
|
||||
{
|
||||
jsdouble x, z;
|
||||
|
||||
if (!js_ValueToNumber(cx, argv[0], &x))
|
||||
return JS_FALSE;
|
||||
z = fd_sqrt(x);
|
||||
return js_NewNumberValue(cx, z, rval);
|
||||
}
|
||||
|
||||
static JSBool
|
||||
math_tan(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
|
||||
{
|
||||
jsdouble x, z;
|
||||
|
||||
if (!js_ValueToNumber(cx, argv[0], &x))
|
||||
return JS_FALSE;
|
||||
z = fd_tan(x);
|
||||
return js_NewNumberValue(cx, z, rval);
|
||||
}
|
||||
|
||||
#if JS_HAS_TOSOURCE
|
||||
static JSBool
|
||||
math_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
|
||||
jsval *rval)
|
||||
{
|
||||
*rval = ATOM_KEY(cx->runtime->atomState.MathAtom);
|
||||
return JS_TRUE;
|
||||
}
|
||||
#endif
|
||||
|
||||
static JSFunctionSpec math_static_methods[] = {
|
||||
#if JS_HAS_TOSOURCE
|
||||
{js_toSource_str, math_toSource, 0, 0, 0},
|
||||
#endif
|
||||
{"abs", math_abs, 1, 0, 0},
|
||||
{"acos", math_acos, 1, 0, 0},
|
||||
{"asin", math_asin, 1, 0, 0},
|
||||
{"atan", math_atan, 1, 0, 0},
|
||||
{"atan2", math_atan2, 2, 0, 0},
|
||||
{"ceil", math_ceil, 1, 0, 0},
|
||||
{"cos", math_cos, 1, 0, 0},
|
||||
{"exp", math_exp, 1, 0, 0},
|
||||
{"floor", math_floor, 1, 0, 0},
|
||||
{"log", math_log, 1, 0, 0},
|
||||
{"max", math_max, 2, 0, 0},
|
||||
{"min", math_min, 2, 0, 0},
|
||||
{"pow", math_pow, 2, 0, 0},
|
||||
{"random", math_random, 0, 0, 0},
|
||||
{"round", math_round, 1, 0, 0},
|
||||
{"sin", math_sin, 1, 0, 0},
|
||||
{"sqrt", math_sqrt, 1, 0, 0},
|
||||
{"tan", math_tan, 1, 0, 0},
|
||||
{0,0,0,0,0}
|
||||
};
|
||||
|
||||
JSObject *
|
||||
js_InitMathClass(JSContext *cx, JSObject *obj)
|
||||
{
|
||||
JSObject *Math;
|
||||
|
||||
Math = JS_DefineObject(cx, obj, "Math", &math_class, NULL, 0);
|
||||
if (!Math)
|
||||
return NULL;
|
||||
if (!JS_DefineFunctions(cx, Math, math_static_methods))
|
||||
return NULL;
|
||||
if (!JS_DefineConstDoubles(cx, Math, math_constants))
|
||||
return NULL;
|
||||
return Math;
|
||||
}
|
||||
Reference in New Issue
Block a user