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Initial check-in to mozilla tree: JSRef development is migrating from JSFUN13_BRANCH of /m/src repository to /m/pub
414 lines
9.3 KiB
C
414 lines
9.3 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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* JS math package.
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*/
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#include <math.h>
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#include <stdlib.h>
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#include "prtypes.h"
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#include "prlong.h"
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#include "prtime.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"},
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{M_LOG2E, "LOG2E"},
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{M_LOG10E, "LOG10E"},
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{M_LN2, "LN2"},
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{M_LN10, "LN10"},
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{M_PI, "PI"},
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{M_SQRT2, "SQRT2"},
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{M_SQRT1_2, "SQRT1_2"},
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{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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};
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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 = (x < 0) ? -x : 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 = 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 = 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 = 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 = 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 = 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 = 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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z = 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 = 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 = 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, 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 = (x > y) ? 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_min(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 = (x < y) ? 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_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 = 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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LL_I2L(tmp, 1000);
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LL_DIV(seed, seed, tmp);
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LL_XOR(tmp, seed, rt->rngMultiplier);
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LL_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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/* 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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LL_ISHL(tmp, 0x5D, 32);
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LL_UI2L(tmp2, 0xEECE66DL);
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LL_OR(rt->rngMultiplier, tmp, tmp2);
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/* rt->rngAddend = 0xBL */
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LL_I2L(rt->rngAddend, 0xBL);
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/* rt->rngMask = (1L << 48) - 1 */
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LL_I2L(tmp, 1);
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LL_SHL(tmp2, tmp, 48);
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LL_SUB(rt->rngMask, tmp2, tmp);
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/* rt->rngDscale = (jsdouble)(1L << 54) */
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LL_SHL(tmp2, tmp, 54);
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LL_L2D(rt->rngDscale, tmp2);
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/* Finally, set the seed from current time. */
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random_setSeed(rt, PR_Now());
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}
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static uint32
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random_next(JSRuntime *rt, int bits)
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{
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int64 nextseed, tmp;
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uint32 retval;
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LL_MUL(nextseed, rt->rngSeed, rt->rngMultiplier);
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LL_ADD(nextseed, nextseed, rt->rngAddend);
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LL_AND(nextseed, nextseed, rt->rngMask);
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rt->rngSeed = nextseed;
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LL_USHR(tmp, nextseed, 48 - bits);
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LL_L2I(retval, tmp);
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return retval;
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}
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static jsdouble
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random_nextDouble(JSRuntime *rt)
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{
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int64 tmp, tmp2;
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jsdouble d;
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LL_ISHL(tmp, random_next(rt, 27), 27);
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LL_UI2L(tmp2, random_next(rt, 27));
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LL_ADD(tmp, tmp, tmp2);
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LL_L2D(d, tmp);
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return d / rt->rngDscale;
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}
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static JSBool
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math_random(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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JSRuntime *rt;
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jsdouble z;
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rt = cx->runtime;
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JS_LOCK_RUNTIME(rt);
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random_init(rt);
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z = random_nextDouble(rt);
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JS_UNLOCK_RUNTIME(rt);
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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_round(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 = floor(x + 0.5);
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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_sin(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 = sin(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_sqrt(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 = sqrt(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_tan(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 = tan(x);
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return js_NewNumberValue(cx, z, rval);
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}
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static JSFunctionSpec math_static_methods[] = {
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{"abs", math_abs, 1},
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{"acos", math_acos, 1},
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{"asin", math_asin, 1},
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{"atan", math_atan, 1},
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{"atan2", math_atan2, 2},
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{"ceil", math_ceil, 1},
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{"cos", math_cos, 1},
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{"exp", math_exp, 1},
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{"floor", math_floor, 1},
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{"log", math_log, 1},
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{"max", math_max, 2},
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{"min", math_min, 2},
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{"pow", math_pow, 2},
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{"random", math_random, 0},
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{"round", math_round, 1},
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{"sin", math_sin, 1},
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{"sqrt", math_sqrt, 1},
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{"tan", math_tan, 1},
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{0}
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};
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#if JS_HAS_TOSOURCE
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static JSBool
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math_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
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jsval *rval)
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{
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*rval = ATOM_KEY(cx->runtime->atomState.MathAtom);
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return JS_TRUE;
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}
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static JSFunctionSpec math_methods[] = {
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{js_toSource_str, math_toSource, 0},
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{0}
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};
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#else
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#define math_methods NULL
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#endif
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JSObject *
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js_InitMathClass(JSContext *cx, JSObject *obj)
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{
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JSObject *proto;
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proto = JS_InitClass(cx, obj, NULL, &math_class, NULL, 0,
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NULL, math_methods, NULL, math_static_methods);
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if (!proto)
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return NULL;
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if (!JS_DefineConstDoubles(cx, proto, math_constants))
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return NULL;
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return proto;
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}
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