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

// Constructor

var FPHelper = function(){}

// Meta

FPHelper.__name__ = ["haxe","io","FPHelper"];
FPHelper.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 exp = i >>> 23 & 255;
	var sig = i & 8388607;
	if(sig == 0 && exp == 0) {
		return 0.0;
	}
	return sign * (1 + Math.pow(2,-23) * sig) * Math.pow(2,exp - 127);
}
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) {
		exp = -127;
	} else if(exp > 128) {
		exp = 128;
	}
	var sig = Math.round((af / Math.pow(2,exp) - 1) * 8388608);
	if(sig == 8388608 && exp < 128) {
		sig = 0;
		++exp;
	}
	return (f < 0 ? -2147483648 : 0) | exp + 127 << 23 | sig;
}
FPHelper.i64ToDouble = function(low,high) {
	var sign = 1 - (high >>> 31 << 1);
	var exp = (high >> 20 & 2047) - 1023;
	var sig = (high & 1048575) * 4294967296. + (low >>> 31) * 2147483648. + (low & 2147483647);
	if(sig == 0 && exp == -1023) {
		return 0.0;
	}
	return sign * (1.0 + Math.pow(2,-52) * sig) * Math.pow(2,exp);
}
FPHelper.doubleToI64 = function(v) {
	var i64 = FPHelper.i64tmp;
	if(v == 0) {
		i64.low = 0;
		i64.high = 0;
	} else if(!isFinite(v)) {
		if(v > 0) {
			i64.low = 0;
			i64.high = 2146435072;
		} else {
			i64.low = 0;
			i64.high = -1048576;
		}
	} else {
		var av = v < 0 ? -v : v;
		var exp = Math.floor(Math.log(av) / 0.6931471805599453);
		var sig = Math.round((av / Math.pow(2,exp) - 1) * 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.i64tmp = (function($this) {
	var $r;
	var this1 = new (haxe__$Int64__$_$_$Int64().default)(0,0);
	$r = this1;
	return $r;
}(this))
FPHelper.LN2 = 0.6931471805599453

// Export

exports.default = FPHelper;