starling-framework/lib/_gen/haxe/io/FPHelper.js

A fast, productive library for 2D cross-platform development.

// Class: haxe.io.FPHelper

var $global = typeof window != "undefined" ? window : typeof global != "undefined" ? global : typeof self != "undefined" ? self : this

$global.Object.defineProperty(exports, "__esModule", {value: true});

var __map_reserved = {};

// Imports

var $hxClasses = require("./../../hxClasses_stub").default;
var $hxEnums = require("./../../hxEnums_stub").default;
var $import = require("./../../import_stub").default;
function haxe__$Int64__$_$_$Int64() {return require("./../../haxe/_Int64/___Int64");}
function Std() {return require("./../../Std");}

// Constructor

var FPHelper = function(){}

// Meta

FPHelper.__name__ = "haxe.io.FPHelper";
FPHelper.__isInterface__ = false;
FPHelper.prototype = {
	
};
FPHelper.prototype.__class__ = FPHelper.prototype.constructor = $hxClasses["haxe.io.FPHelper"] = FPHelper;

// Init



// Statics

FPHelper._i32ToFloat = function(i) {
	var sign = 1 - (i >>> 31 << 1);
	var e = i >> 23 & 255;
	if(e == 255) {
		if((i & 8388607) == 0) {
			if(sign > 0) {
				return Infinity;
			} else {
				return -Infinity;
			}
		} else {
			return NaN;
		}
	}
	var m = e == 0 ? (i & 8388607) << 1 : i & 8388607 | 8388608;
	return sign * m * Math.pow(2,e - 150);
}
FPHelper._i64ToDouble = function(lo,hi) {
	var sign = 1 - (hi >>> 31 << 1);
	var e = hi >> 20 & 2047;
	if(e == 2047) {
		if(lo == 0 && (hi & 1048575) == 0) {
			if(sign > 0) {
				return Infinity;
			} else {
				return -Infinity;
			}
		} else {
			return NaN;
		}
	}
	var m = 2.220446049250313e-16 * ((hi & 1048575) * 4294967296. + (lo >>> 31) * 2147483648. + (lo & 2147483647));
	if(e == 0) {
		m *= 2.0;
	} else {
		m += 1.0;
	}
	return sign * m * Math.pow(2,e - 1023);
}
FPHelper._floatToI32 = function(f) {
	if(f == 0) {
		return 0;
	}
	var af = f < 0 ? -f : f;
	var exp = Math.floor(Math.log(af) / 0.6931471805599453);
	if(exp > 127) {
		return 2139095040;
	} else {
		if(exp <= -127) {
			exp = -127;
			af *= 7.1362384635298e+44;
		} else {
			af = (af / Math.pow(2,exp) - 1.0) * 8388608;
		}
		return (f < 0 ? -2147483648 : 0) | exp + 127 << 23 | Math.round(af);
	}
}
FPHelper._doubleToI64 = function(v) {
	var i64 = FPHelper.i64tmp;
	if(v == 0) {
		i64.low = 0;
		i64.high = 0;
	} else if(!isFinite(v)) {
		i64.low = 0;
		i64.high = v > 0 ? 2146435072 : -1048576;
	} else {
		var av = v < 0 ? -v : v;
		var exp = Math.floor(Math.log(av) / 0.6931471805599453);
		if(exp > 1023) {
			i64.low = -1;
			i64.high = 2146435071;
		} else {
			if(exp <= -1023) {
				exp = -1023;
				av /= 2.2250738585072014e-308;
			} else {
				av = av / Math.pow(2,exp) - 1.0;
			}
			var sig = Math.round(av * 4503599627370496.);
			var sig_l = (Std().default).int(sig);
			var sig_h = (Std().default).int(sig / 4294967296.0);
			i64.low = sig_l;
			i64.high = (v < 0 ? -2147483648 : 0) | exp + 1023 << 20 | sig_h;
		}
	}
	return i64;
}
FPHelper.i32ToFloat = function(i) {
	FPHelper.helper.setInt32(0,i,true);
	return FPHelper.helper.getFloat32(0,true);
}
FPHelper.floatToI32 = function(f) {
	FPHelper.helper.setFloat32(0,f,true);
	return FPHelper.helper.getInt32(0,true);
}
FPHelper.i64ToDouble = function(low,high) {
	FPHelper.helper.setInt32(0,low,true);
	FPHelper.helper.setInt32(4,high,true);
	return FPHelper.helper.getFloat64(0,true);
}
FPHelper.doubleToI64 = function(v) {
	var i64 = FPHelper.i64tmp;
	FPHelper.helper.setFloat64(0,v,true);
	i64.low = FPHelper.helper.getInt32(0,true);
	i64.high = FPHelper.helper.getInt32(4,true);
	return i64;
}
FPHelper.i64tmp = (function($this) {
	var $r;
	var this1 = new (haxe__$Int64__$_$_$Int64().default)(0,0);
	$r = this1;
	return $r;
}(this))
FPHelper.LN2 = 0.6931471805599453
FPHelper.helper = new DataView(new ArrayBuffer(8))

// Export

exports.default = FPHelper;