// Acorn: Copyright 2012 Marijn Haverbeke, MIT License
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// JS-Interpreter: Copyright 2013 Google Inc, Apache 2.0
var Interpreter=function(a,b){this.initFunc_=b;this.UNDEFINED=this.createPrimitive(void 0);this.ast=acorn.parse(a);var c=this.createScope(this.ast,null);this.stateStack=[{node:this.ast,scope:c,thisExpression:c}]};Interpreter.prototype.step=function(){if(0==this.stateStack.length)return!1;var a=this.stateStack[0];this["step"+a.node.type]();return!0};Interpreter.prototype.run=function(){for(;this.step(););};
Interpreter.prototype.initGlobalScope=function(a){this.setProperty(a,"Infinity",this.createPrimitive(Infinity),!0);this.setProperty(a,"NaN",this.createPrimitive(NaN),!0);this.setProperty(a,"undefined",this.UNDEFINED,!0);this.setProperty(a,"window",a,!0);this.setProperty(a,"self",a,!1);this.initFunction(a);this.initObject(a);a.parent=this.OBJECT;this.initArray(a);this.initNumber(a);this.initString(a);this.initBoolean(a);this.initDate(a);this.initMath(a);var b=this,c;c=function(a){a=a||b.UNDEFINED;
return b.createPrimitive(isNaN(a.toNumber()))};this.setProperty(a,"isNaN",this.createNativeFunction(c));c=function(a){a=a||b.UNDEFINED;return b.createPrimitive(isFinite(a.toNumber()))};this.setProperty(a,"isFinite",this.createNativeFunction(c));c=function(a){a=a||b.UNDEFINED;return b.createPrimitive(parseFloat(a.toNumber()))};this.setProperty(a,"parseFloat",this.createNativeFunction(c));c=function(a,c){a=a||b.UNDEFINED;c=c||b.UNDEFINED;return b.createPrimitive(parseInt(a.toString(),c.toNumber()))};
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Interpreter.prototype.initFunction=function(a){var b=this,c;c=function(a){for(var c=this.parent==b.FUNCTION?this:b.createObject(b.FUNCTION),f=arguments.length?arguments[arguments.length-1].toString():"",h=[],m=0;m<arguments.length-1;m++)h.push(arguments[m].toString());h=h.join(", ");if(-1!=h.indexOf(")"))throw new SyntaxError("Function arg string contains parenthesis");c.parentScope=b.stateStack[b.stateStack.length-1].scope;f=acorn.parse("$ = function("+h+") {"+f+"};");c.node=f.body[0].expression.right;b.setProperty(c,
"length",b.createPrimitive(c.node.length),!0);return c};this.FUNCTION=this.createObject(null);this.setProperty(a,"Function",this.FUNCTION);this.FUNCTION.type="function";this.setProperty(this.FUNCTION,"prototype",this.createObject(null));this.FUNCTION.nativeFunc=c;a={type:"FunctionApply_",params:[],id:null,body:null,start:0,end:0};this.setProperty(this.FUNCTION.properties.prototype,"apply",this.createFunction(a,{}),!1,!0);a={type:"FunctionCall_",params:[],id:null,body:null,start:0,end:0};this.setProperty(this.FUNCTION.properties.prototype,
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Interpreter.prototype.initObject=function(a){var b=this,c;c=function(){var a=this.parent==b.OBJECT?this:b.createObject(b.OBJECT);return a};this.OBJECT=this.createNativeFunction(c);this.setProperty(a,"Object",this.OBJECT);c=function(){return b.createPrimitive(this.toString())};this.setProperty(this.OBJECT.properties.prototype,"toString",this.createNativeFunction(c),!1,!0);c=function(){return b.createPrimitive(this.valueOf())};this.setProperty(this.OBJECT.properties.prototype,"valueOf",this.createNativeFunction(c),
!1,!0)};
Interpreter.prototype.initArray=function(a){var b=this,c=function(a,b){var c=a?Math.floor(a.toNumber()):b;isNaN(c)&&(c=b);return c},d;d=function(a){var c=this.parent==b.ARRAY?this:b.createObject(b.ARRAY),d=arguments[0];if(d&&"number"==d.type){if(isNaN(b.arrayIndex(d)))throw new RangeError("Invalid array length");c.length=d.data}else{for(d=0;d<arguments.length;d++)c.properties[d]=arguments[d];c.length=d}return c};this.ARRAY=this.createNativeFunction(d);this.setProperty(a,"Array",this.ARRAY);d=function(){if(this.length){var a=
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this.length;c++)this.properties[c-1]=this.properties[c];this.length--;delete this.properties[this.length]}else a=b.UNDEFINED;return a};this.setProperty(this.ARRAY.properties.prototype,"shift",this.createNativeFunction(d),!1,!0);d=function(a){for(var c=this.length-1;0<=c;c--)this.properties[c+arguments.length]=this.properties[c];this.length+=arguments.length;for(c=0;c<arguments.length;c++)this.properties[c]=arguments[c];return b.createPrimitive(this.length)};this.setProperty(this.ARRAY.properties.prototype,
"unshift",this.createNativeFunction(d),!1,!0);d=function(){for(var a=0;a<this.length/2;a++){var c=this.properties[this.length-a-1];this.properties[this.length-a-1]=this.properties[a];this.properties[a]=c}return b.UNDEFINED};this.setProperty(this.ARRAY.properties.prototype,"reverse",this.createNativeFunction(d),!1,!0);d=function(a,d,h){a=c(a,0);a=0>a?Math.max(this.length+a,0):Math.min(a,this.length);d=c(d,Infinity);d=Math.min(d,this.length-a);for(var m=b.createObject(b.ARRAY),r=a;r<a+d;r++)m.properties[m.length++]=
this.properties[r],this.properties[r]=this.properties[r+d];for(r=a+d;r<this.length;r++)delete this.properties[r];this.length-=d;for(r=this.length-1;r>=a;r--)this.properties[r+arguments.length-2]=this.properties[r];this.length+=arguments.length-2;for(r=2;r<arguments.length;r++)this.properties[a+r-2]=arguments[r];return m};this.setProperty(this.ARRAY.properties.prototype,"splice",this.createNativeFunction(d),!1,!0);d=function(a,d){var h=b.createObject(b.ARRAY),m=c(a,0);0>m&&(m=this.length+m);var m=
Math.max(0,Math.min(m,this.length)),r=c(d,this.length);0>r&&(r=this.length+r);for(var r=Math.max(0,Math.min(r,this.length)),z=0;m<r;m++){var t=b.getProperty(this,m);b.setProperty(h,z++,t)}return h};this.setProperty(this.ARRAY.properties.prototype,"slice",this.createNativeFunction(d),!1,!0);d=function(a){a=a&&void 0!==a.data?a.toString():void 0;for(var c=[],d=0;d<this.length;d++)c[d]=this.properties[d];return b.createPrimitive(c.join(a))};this.setProperty(this.ARRAY.properties.prototype,"join",this.createNativeFunction(d),
!1,!0);d=function(a){for(var c=b.createObject(b.ARRAY),d=0,m=0;m<this.length;m++){var r=b.getProperty(this,m);b.setProperty(c,d++,r)}for(m=0;m<arguments.length;m++){var z=arguments[m];if(b.isa(z,b.ARRAY))for(var t=0;t<z.length;t++)r=b.getProperty(z,t),b.setProperty(c,d++,r);else b.setProperty(c,d++,z)}return c};this.setProperty(this.ARRAY.properties.prototype,"concat",this.createNativeFunction(d),!1,!0);d=function(a,d){a=a||b.UNDEFINED;var h=c(d,0);0>h&&(h=this.length+h);for(h=Math.max(0,Math.min(h,
this.length));h<this.length;h++){var m=b.getProperty(this,h);if(0==b.comp(m,a))return b.createPrimitive(h)}return b.createPrimitive(-1)};this.setProperty(this.ARRAY.properties.prototype,"indexOf",this.createNativeFunction(d),!1,!0);d=function(a,d){a=a||b.UNDEFINED;var h=c(d,this.length);0>h&&(h=this.length+h);for(h=Math.max(0,Math.min(h,this.length));0<=h;h--){var m=b.getProperty(this,h);if(0==b.comp(m,a))return b.createPrimitive(h)}return b.createPrimitive(-1)};this.setProperty(this.ARRAY.properties.prototype,
"lastIndexOf",this.createNativeFunction(d),!1,!0)};
Interpreter.prototype.initNumber=function(a){var b=this,c;c=function(a){a=a?a.toNumber():0;if(this.parent==b.NUMBER)this.toBoolean=function(){return!!a},this.toNumber=function(){return a},this.toString=function(){return String(a)};else return b.createPrimitive(a)};this.NUMBER=this.createNativeFunction(c);this.setProperty(a,"Number",this.NUMBER);a=["MAX_VALUE","MIN_VALUE","NaN","NEGATIVE_INFINITY","POSITIVE_INFINITY"];for(c=0;c<a.length;c++)this.setProperty(this.NUMBER,a[c],this.createPrimitive(Number[a[c]]));
c=function(a){a=a?a.toNumber():void 0;var c=this.toNumber();return b.createPrimitive(c.toExponential(a))};this.setProperty(this.NUMBER.properties.prototype,"toExponential",this.createNativeFunction(c),!1,!0);c=function(a){a=a?a.toNumber():void 0;var c=this.toNumber();return b.createPrimitive(c.toFixed(a))};this.setProperty(this.NUMBER.properties.prototype,"toFixed",this.createNativeFunction(c),!1,!0);c=function(a){a=a?a.toNumber():void 0;var c=this.toNumber();return b.createPrimitive(c.toPrecision(a))};
this.setProperty(this.NUMBER.properties.prototype,"toPrecision",this.createNativeFunction(c),!1,!0)};
Interpreter.prototype.initString=function(a){var b=this,c;c=function(a){a=(a||b.UNDEFINED).toString();if(this.parent==b.STRING)this.toBoolean=function(){return!!a},this.toNumber=function(){return Number(a)},this.toString=function(){return a},this.valueOf=function(){return a},this.data=a;else return b.createPrimitive(a)};this.STRING=this.createNativeFunction(c);this.setProperty(a,"String",this.STRING);a=["toLowerCase","toUpperCase","toLocaleLowerCase","toLocaleUpperCase"];for(var d=0;d<a.length;d++)c=
function(a){return function(){return b.createPrimitive(a.apply(this))}}(String.prototype[a[d]]),this.setProperty(this.STRING.properties.prototype,a[d],this.createNativeFunction(c),!1,!0);c=function(){var a=this.toString();return b.createPrimitive(a.replace(/^\s+|\s+$/g,""))};this.setProperty(this.STRING.properties.prototype,"trim",this.createNativeFunction(c),!1,!0);c=function(){var a=this.toString();return b.createPrimitive(a.replace(/^\s+/g,""))};this.setProperty(this.STRING.properties.prototype,
"trimLeft",this.createNativeFunction(c),!1,!0);c=function(){var a=this.toString();return b.createPrimitive(a.replace(/\s+$/g,""))};this.setProperty(this.STRING.properties.prototype,"trimRight",this.createNativeFunction(c),!1,!0);c=function(a){var c=this.toString();a=(a||b.UNDEFINED).toNumber();return b.createPrimitive(c.charAt(a))};this.setProperty(this.STRING.properties.prototype,"charAt",this.createNativeFunction(c),!1,!0);c=function(a){var c=this.toString();a=(a||b.UNDEFINED).toNumber();return b.createPrimitive(c.charCodeAt(a))};
this.setProperty(this.STRING.properties.prototype,"charCodeAt",this.createNativeFunction(c),!1,!0);c=function(a,c){var d=this.toString();a=(a||b.UNDEFINED).toString();c=c?c.toNumber():void 0;return b.createPrimitive(d.indexOf(a,c))};this.setProperty(this.STRING.properties.prototype,"indexOf",this.createNativeFunction(c),!1,!0);c=function(a,c){var d=this.toString();a=(a||b.UNDEFINED).toString();c=c?c.toNumber():void 0;return b.createPrimitive(d.lastIndexOf(a,c))};this.setProperty(this.STRING.properties.prototype,
"lastIndexOf",this.createNativeFunction(c),!1,!0);c=function(a,c){var d=this.toString();a=a?a.toString():void 0;c=c?c.toNumber():void 0;for(var d=d.split(a,c),m=b.createObject(b.ARRAY),r=0;r<d.length;r++)b.setProperty(m,r,b.createPrimitive(d[r]));return m};this.setProperty(this.STRING.properties.prototype,"split",this.createNativeFunction(c),!1,!0);c=function(a,c){var d=this.toString();a=a?a.toNumber():void 0;c=c?c.toNumber():void 0;return b.createPrimitive(d.substring(a,c))};this.setProperty(this.STRING.properties.prototype,
"substring",this.createNativeFunction(c),!1,!0);c=function(a,c){var d=this.toString();a=a?a.toNumber():void 0;c=c?c.toNumber():void 0;return b.createPrimitive(d.substr(a,c))};this.setProperty(this.STRING.properties.prototype,"substr",this.createNativeFunction(c),!1,!0);c=function(a){for(var c=this.toString(),d=0;d<arguments.length;d++)c+=arguments[d].toString();return b.createPrimitive(c)};this.setProperty(this.STRING.properties.prototype,"concat",this.createNativeFunction(c),!1,!0);c=function(a,
c){var d=this.toString();a=a?a.toNumber():void 0;c=c?c.toNumber():void 0;return b.createPrimitive(d.slice(a,c))};this.setProperty(this.STRING.properties.prototype,"slice",this.createNativeFunction(c),!1,!0)};
Interpreter.prototype.initBoolean=function(a){var b=this,c;c=function(a){a=a?a.toBoolean():!1;if(this.parent==b.STRING)this.toBoolean=function(){return a},this.toNumber=function(){return Number(a)},this.toString=function(){return String(a)},this.valueOf=function(){return a};else return b.createPrimitive(a)};this.BOOLEAN=this.createNativeFunction(c);this.setProperty(a,"Boolean",this.BOOLEAN)};
Interpreter.prototype.initDate=function(a){var b=this,c;c=function(a,c,d,m,r,z,t){var C=this.parent==b.DATE?this:b.createObject(b.DATE),k=a;if(arguments.length)if(1!=arguments.length||"string"!=k.type&&!b.isa(k,b.STRING)){for(var k=[],N=0;N<arguments.length;N++)k[N]=arguments[N]?arguments[N].toNumber():void 0;C.date=1==k.length?new Date(k[0]):2==k.length?new Date(k[0],k[1]):3==k.length?new Date(k[0],k[1],k[2]):4==k.length?new Date(k[0],k[1],k[2],k[3]):5==k.length?new Date(k[0],k[1],k[2],k[3],k[4]):
7==k.length?new Date(k[0],k[1],k[2],k[3],k[4],k[5]):new Date(k[0],k[1],k[2],k[3],k[4],k[5],k[6])}else C.date=new Date(k.toString());else C.date=new Date;C.toString=function(){return String(this.date)};C.toNumber=function(){return Number(this.date)};C.valueOf=function(){return this.date.valueOf()};return C};this.DATE=this.createNativeFunction(c);this.setProperty(a,"Date",this.DATE);c=function(){return b.createPrimitive((new Date).getTime())};this.setProperty(this.DATE,"now",this.createNativeFunction(c),
!1,!0);c=function(a){a=a?a.toString():void 0;return b.createPrimitive(Date.parse(a))};this.setProperty(this.DATE,"parse",this.createNativeFunction(c),!1,!0);c=function(a,c,d,m,r,z,t){for(var C=[],k=0;k<arguments.length;k++)C[k]=arguments[k]?arguments[k].toNumber():void 0;return b.createPrimitive(Date.UTC.apply(Date,C))};this.setProperty(this.DATE,"UTC",this.createNativeFunction(c),!1,!0);var d="getDate getDay getFullYear getHours getMilliseconds getMinutes getMonth getSeconds getTime getTimezoneOffset getUTCDate getUTCDay getUTCFullYear getUTCHours getUTCMilliseconds getUTCMinutes getUTCMonth getUTCSeconds getYear".split(" ");
for(a=0;a<d.length;a++)c=function(a){return function(){return b.createPrimitive(this.date[a]())}}(d[a]),this.setProperty(this.DATE.properties.prototype,d[a],this.createNativeFunction(c),!1,!0);d="setDate setFullYear setHours setMilliseconds setMinutes setMonth setSeconds setTime setUTCDate setUTCFullYear setUTCHours setUTCMilliseconds setUTCMinutes setUTCMonth setUTCSeconds setYear".split(" ");for(a=0;a<d.length;a++)c=function(a){return function(c){for(var d=[],m=0;m<arguments.length;m++)d[m]=arguments[m]?
arguments[m].toNumber():void 0;return b.createPrimitive(this.date[a].apply(this.date,d))}}(d[a]),this.setProperty(this.DATE.properties.prototype,d[a],this.createNativeFunction(c),!1,!0);d="toDateString toISOString toGMTString toLocaleDateString toLocaleString toLocaleTimeString toTimeString toUTCString".split(" ");for(a=0;a<d.length;a++)c=function(a){return function(){return b.createPrimitive(this.date[a]())}}(d[a]),this.setProperty(this.DATE.properties.prototype,d[a],this.createNativeFunction(c),
!1,!0)};
Interpreter.prototype.initMath=function(a){var b=this,c=this.createObject(this.OBJECT);this.setProperty(a,"Math",c);var d="E LN2 LN10 LOG2E LOG10E PI SQRT1_2 SQRT2".split(" ");for(a=0;a<d.length;a++)this.setProperty(c,d[a],this.createPrimitive(Math[d[a]]));d="abs acos asin atan atan2 ceil cos exp floor log max min pow random round sin sqrt tan".split(" ");for(a=0;a<d.length;a++){var e=function(a){return function(){for(var c=0;c<arguments.length;c++)arguments[c]=arguments[c].toNumber();return b.createPrimitive(a.apply(Math,arguments))}}(Math[d[a]]);
this.setProperty(c,d[a],this.createNativeFunction(e))}};Interpreter.prototype.isa=function(a,b){if(a&&b){if(a.parent==b)return!0;if(!a.parent||!a.parent.prototype)return!1}else return!1;return this.isa(a.parent.prototype,b)};Interpreter.prototype.comp=function(a,b){if(a.isPrimitive&&"number"==typeof a&&isNaN(a.data)||b.isPrimitive&&"number"==typeof b&&isNaN(b.data)||!a.isPrimitive||!b.isPrimitive)return NaN;a=a.data;b=b.data;return a<b?-1:a>b?1:0};
Interpreter.prototype.arrayIndex=function(a){a=Number(a);return!isFinite(a)||a!=Math.floor(a)||0>a?NaN:a};Interpreter.prototype.createPrimitive=function(a){var b=typeof a;a={data:a,isPrimitive:!0,type:b,toBoolean:function(){return Boolean(this.data)},toNumber:function(){return Number(this.data)},toString:function(){return String(this.data)},valueOf:function(){return this.data}};"number"==b?a.parent=this.NUMBER:"string"==b?a.parent=this.STRING:"boolean"==b&&(a.parent=this.BOOLEAN);return a};
Interpreter.prototype.createObject=function(a){a={isPrimitive:!1,type:"object",parent:a,fixed:Object.create(null),nonenumerable:Object.create(null),properties:Object.create(null),toBoolean:function(){return!0},toNumber:function(){return 0},toString:function(){return"["+this.type+"]"},valueOf:function(){return this}};this.isa(a,this.FUNCTION)&&(a.type="function",this.setProperty(a,"prototype",this.createObject(this.OBJECT||null)));this.isa(a,this.ARRAY)&&(a.length=0,a.toString=function(){for(var a=
[],c=0;c<this.length;c++)a[c]=this.properties[c].toString();return a.join(",")});return a};Interpreter.prototype.createFunction=function(a,b){var c=this.createObject(this.FUNCTION);c.parentScope=b||this.getScope();c.node=a;this.setProperty(c,"length",this.createPrimitive(c.node.params.length),!0);return c};Interpreter.prototype.createNativeFunction=function(a){var b=this.createObject(this.FUNCTION);b.nativeFunc=a;this.setProperty(b,"length",this.createPrimitive(a.length),!0);return b};
Interpreter.prototype.getProperty=function(a,b){b=b.toString();if(this.isa(a,this.STRING)){if("length"==b)return this.createPrimitive(a.data.length);var c=this.arrayIndex(b);if(!isNaN(c)&&c<a.data.length)return this.createPrimitive(a.data[c])}else if(this.isa(a,this.ARRAY)&&"length"==b)return this.createPrimitive(a.length);for(;;){if(a.properties&&b in a.properties)return a.properties[b];if(a.parent&&a.parent.properties&&a.parent.properties.prototype)a=a.parent.properties.prototype;else break}return this.UNDEFINED};
Interpreter.prototype.hasProperty=function(a,b){b=b.toString();if(a.isPrimitive)throw new TypeError("Primitive data type has no properties");if("length"==b&&(this.isa(a,this.STRING)||this.isa(a,this.ARRAY)))return!0;if(this.isa(a,this.STRING)){var c=this.arrayIndex(b);if(!isNaN(c)&&c<a.data.length)return!0}for(;;){if(a.properties&&b in a.properties)return!0;if(a.parent&&a.parent.properties&&a.parent.properties.prototype)a=a.parent.properties.prototype;else break}return!1};
Interpreter.prototype.setProperty=function(a,b,c,d,e){b=b.toString();if(!a.isPrimitive&&!a.fixed[b]){if(this.isa(a,this.STRING)){var f=this.arrayIndex(b);if("length"==b||!isNaN(f)&&f<a.data.length)return}if(this.isa(a,this.ARRAY)){var h;if("length"==b){b=this.arrayIndex(c.toNumber());if(isNaN(b))throw new RangeError("Invalid array length");if(b<a.length)for(h in a.properties)h=this.arrayIndex(h),!isNaN(h)&&b<=h&&delete a.properties[h];a.length=b;return}isNaN(h=this.arrayIndex(b))||(a.length=Math.max(a.length,
h+1))}a.properties[b]=c;d&&(a.fixed[b]=!0);e&&(a.nonenumerable[b]=!0)}};Interpreter.prototype.deleteProperty=function(a,b){b=b.toString();return a.isPrimitive||a.fixed[b]||"length"==b&&this.isa(a,this.ARRAY)?!1:delete a.properties[b]};Interpreter.prototype.getScope=function(){for(var a=0;a<this.stateStack.length;a++)if(this.stateStack[a].scope)return this.stateStack[a].scope;throw"No scope found.";};
Interpreter.prototype.createScope=function(a,b){var c=this.createObject(null);(c.parentScope=b)||this.initGlobalScope(c);this.populateScope_(a,c);return c};Interpreter.prototype.getValueFromScope=function(a){var b=this.getScope();for(a=a.toString();b;){if(this.hasProperty(b,a))return this.getProperty(b,a);b=b.parentScope}throw"Unknown identifier: "+a;};
Interpreter.prototype.setValueToScope=function(a,b){for(var c=this.getScope(),d=a.toString();c;){if(this.hasProperty(c,d))return this.setProperty(c,d,b);c=c.parentScope}throw"Unknown identifier: "+d;};
Interpreter.prototype.populateScope_=function(a,b){if("VariableDeclaration"==a.type)for(var c=0;c<a.declarations.length;c++)this.setProperty(b,a.declarations[c].id.name,this.UNDEFINED);else{if("FunctionDeclaration"==a.type){this.setProperty(b,a.id.name,this.createFunction(a,b));return}if("FunctionExpression"==a.type)return}var d=this,e;for(e in a){var f=a[e];if(f&&"object"==typeof f)if("number"==typeof f.length&&f.splice)for(c=0;c<f.length;c++){var h=f[c];h.constructor==d.ast.constructor&&d.populateScope_(h,
b)}else f.constructor==d.ast.constructor&&d.populateScope_(f,b)}};Interpreter.prototype.getValue=function(a){if(a.length){var b=a[0];a=a[1];return this.getProperty(b,a)}return this.getValueFromScope(a)};Interpreter.prototype.setValue=function(a,b){if(a.length){var c=a[0],d=a[1];this.setProperty(c,d,b)}else this.setValueToScope(a,b)};
Interpreter.prototype.stepArrayExpression=function(){var a=this.stateStack[0],b=a.node,c=a.n||0;a.array?this.setProperty(a.array,c-1,a.value):a.array=this.createObject(this.ARRAY);b.elements[c]?(a.n=c+1,this.stateStack.unshift({node:b.elements[c]})):(a.array.length=a.n||0,this.stateStack.shift(),this.stateStack[0].value=a.array)};
Interpreter.prototype.stepAssignmentExpression=function(){var a=this.stateStack[0],b=a.node;if(a.doneLeft)if(a.doneRight){this.stateStack.shift();var c=a.leftSide,d=a.value;if("="==b.operator)b=d;else{var a=this.getValue(c),e=a.toNumber(),f=d.toNumber();if("+="==b.operator)"string"==a.type||"string"==d.type?(b=a.toString(),a=d.toString()):(b=e,a=f),b+=a;else if("-="==b.operator)b=e-f;else if("*="==b.operator)b=e*f;else if("/="==b.operator)b=e/f;else if("%="==b.operator)b=e%f;else if("<<="==b.operator)b=
e<<f;else if(">>="==b.operator)b=e>>f;else if(">>>="==b.operator)b=e>>>f;else if("&="==b.operator)b=e&f;else if("^="==b.operator)b=e^f;else if("|="==b.operator)b=e|f;else throw"Unknown assignment expression: "+b.operator;b=this.createPrimitive(b)}this.setValue(c,b);this.stateStack[0].value=b}else a.doneRight=!0,a.leftSide=a.value,this.stateStack.unshift({node:b.right});else a.doneLeft=!0,this.stateStack.unshift({node:b.left,components:!0})};
Interpreter.prototype.stepBinaryExpression=function(){var a=this.stateStack[0],b=a.node;if(a.doneLeft)if(a.doneRight){this.stateStack.shift();var c=a.leftValue,a=a.value,d=this.comp(c,a);if("=="==b.operator||"!="==b.operator)c=0===d,"!="==b.operator&&(c=!c);else if("==="==b.operator||"!=="==b.operator)c=c.isPrimitive&&a.isPrimitive?c.data===a.data:c===a,"!=="==b.operator&&(c=!c);else if(">"==b.operator)c=1==d;else if(">="==b.operator)c=1==d||0===d;else if("<"==b.operator)c=-1==d;else if("<="==b.operator)c=
-1==d||0===d;else if("+"==b.operator)"string"==c.type||"string"==a.type?(c=c.toString(),a=a.toString()):(c=c.toNumber(),a=a.toNumber()),c+=a;else if("in"==b.operator)c=this.hasProperty(a,c);else if(c=c.toNumber(),a=a.toNumber(),"-"==b.operator)c-=a;else if("*"==b.operator)c*=a;else if("/"==b.operator)c/=a;else if("%"==b.operator)c%=a;else if("&"==b.operator)c&=a;else if("|"==b.operator)c|=a;else if("^"==b.operator)c^=a;else if("<<"==b.operator)c<<=a;else if(">>"==b.operator)c>>=a;else if(">>>"==b.operator)c>>>=
a;else throw"Unknown binary operator: "+b.operator;this.stateStack[0].value=this.createPrimitive(c)}else a.doneRight=!0,a.leftValue=a.value,this.stateStack.unshift({node:b.right});else a.doneLeft=!0,this.stateStack.unshift({node:b.left})};
Interpreter.prototype.stepBreakStatement=function(){var a=this.stateStack.shift(),a=a.node,b=null;a.label&&(b=a.label.name);for(a=this.stateStack.shift();a&&"callExpression"!=a.node.type;){if(b?b==a.label:a.isLoop)return;a=this.stateStack.shift()}throw new SyntaxError("Illegal break statement");};Interpreter.prototype.stepBlockStatement=function(){var a=this.stateStack[0],b=a.node,c=a.n_||0;b.body[c]?(a.n_=c+1,this.stateStack.unshift({node:b.body[c]})):this.stateStack.shift()};
Interpreter.prototype.stepCallExpression=function(){var a=this.stateStack[0],b=a.node;if(a.doneCallee_){if(a.func_)c=a.n_,a.arguments.length!=b.arguments.length&&(a.arguments[c-1]=a.value);else{if("function"==a.value.type)a.func_=a.value;else if(a.member_=a.value[0],a.func_=this.getValue(a.value),!a.func_||"function"!=a.func_.type)throw new TypeError((a.func_&&a.func_.type)+" is not a function");"NewExpression"==a.node.type?(a.funcThis_=this.createObject(a.func_),a.isConstructor_=!0):a.funcThis_=
a.value.length?a.value[0]:this.stateStack[this.stateStack.length-1].thisExpression;a.arguments=[];var c=0}if(b.arguments[c])a.n_=c+1,this.stateStack.unshift({node:b.arguments[c]});else if(a.doneExec)this.stateStack.shift(),this.stateStack[0].value=a.isConstructor_?a.funcThis_:a.value;else{a.doneExec=!0;if(a.func_.node&&("FunctionApply_"==a.func_.node.type||"FunctionCall_"==a.func_.node.type)){a.funcThis_=a.arguments.shift();if("FunctionApply_"==a.func_.node.type){var d=a.arguments.shift();if(d&&this.isa(d,
this.ARRAY))for(a.arguments=[],b=0;b<d.length;b++)a.arguments[b]=this.getProperty(d,b);else a.arguments=[]}a.func_=a.member_}if(a.func_.node){c=this.createScope(a.func_.node.body,a.func_.parentScope);for(b=0;b<a.func_.node.params.length;b++){var d=this.createPrimitive(a.func_.node.params[b].name),e=a.arguments.length>b?a.arguments[b]:this.UNDEFINED;this.setProperty(c,d,e)}d=this.createObject(this.ARRAY);for(b=0;b<a.arguments.length;b++)this.setProperty(d,this.createPrimitive(b),a.arguments[b]);this.setProperty(c,
"arguments",d);b={node:a.func_.node.body,scope:c,thisExpression:a.funcThis_};this.stateStack.unshift(b);a.value=this.UNDEFINED}else if(a.func_.nativeFunc)a.value=a.func_.nativeFunc.apply(a.funcThis_,a.arguments);else if(a.func_.eval)(b=a.arguments[0])?b.isPrimitive?(a=new Interpreter(b.toString()),a.stateStack[0].scope.parentScope=this.getScope(),a={node:{type:"Eval_"},interpreter:a},this.stateStack.unshift(a)):a.value=b:a.value=this.UNDEFINED;else throw new TypeError("function not a function (huh?)");
}}else a.doneCallee_=!0,this.stateStack.unshift({node:b.callee,components:!0})};Interpreter.prototype.stepConditionalExpression=function(){var a=this.stateStack[0];a.done?(this.stateStack.shift(),"ConditionalExpression"==a.node.type&&(this.stateStack[0].value=a.value)):a.test?(a.done=!0,a.value.toBoolean()&&a.node.consequent?this.stateStack.unshift({node:a.node.consequent}):!a.value.toBoolean()&&a.node.alternate&&this.stateStack.unshift({node:a.node.alternate})):(a.test=!0,this.stateStack.unshift({node:a.node.test}))};
Interpreter.prototype.stepContinueStatement=function(){var a=this.stateStack[0].node,b=null;a.label&&(b=a.label.name);for(a=this.stateStack[0];a&&"callExpression"!=a.node.type;){if(a.isLoop&&(!b||b==a.label))return;this.stateStack.shift();a=this.stateStack[0]}throw new SyntaxError("Illegal continue statement");};
Interpreter.prototype.stepDoWhileStatement=function(){var a=this.stateStack[0];a.isLoop=!0;"DoWhileStatement"==a.node.type&&void 0===a.test&&(a.value=this.createPrimitive(!0),a.test=!0);a.test?(a.test=!1,a.value.toBoolean()?a.node.body&&this.stateStack.unshift({node:a.node.body}):this.stateStack.shift()):(a.test=!0,this.stateStack.unshift({node:a.node.test}))};Interpreter.prototype.stepEmptyStatement=function(){this.stateStack.shift()};
Interpreter.prototype.stepEval_=function(){var a=this.stateStack[0];a.interpreter.step()||(this.stateStack.shift(),this.stateStack[0].value=a.interpreter.value||this.UNDEFINED)};Interpreter.prototype.stepExpressionStatement=function(){var a=this.stateStack[0];a.done?(this.stateStack.shift(),this.value=a.value):(a.done=!0,this.stateStack.unshift({node:a.node.expression}))};
Interpreter.prototype.stepForInStatement=function(){var a=this.stateStack[0];a.isLoop=!0;var b=a.node;if(a.doneVariable_)if(a.doneObject_){"undefined"==typeof a.iterator&&(a.object=a.value,a.iterator=0);var c=null;t:do{var d=a.iterator,e;for(e in a.object.properties)if(!(e in a.object.nonenumerable)){if(0==d){c=e;break t}d--}a.object=a.object.parent&&a.object.parent.properties.prototype;a.iterator=0}while(a.object);a.iterator++;null===c?this.stateStack.shift():(this.setValueToScope(a.variable,this.createPrimitive(c)),
b.body&&this.stateStack.unshift({node:b.body}))}else a.doneObject_=!0,a.variable=a.value,this.stateStack.unshift({node:b.right});else a.doneVariable_=!0,a=b.left,"VariableDeclaration"==a.type&&(a=a.declarations[0].id),this.stateStack.unshift({node:a,components:!0})};
Interpreter.prototype.stepForStatement=function(){var a=this.stateStack[0];a.isLoop=!0;var b=a.node,c=a.mode||0;0==c?(a.mode=1,b.init&&this.stateStack.unshift({node:b.init})):1==c?(a.mode=2,b.test&&this.stateStack.unshift({node:b.test})):2==c?(a.mode=3,a.value&&!a.value.toBoolean()?this.stateStack.shift():b.body&&this.stateStack.unshift({node:b.body})):3==c&&(a.mode=1,b.update&&this.stateStack.unshift({node:b.update}))};Interpreter.prototype.stepFunctionDeclaration=function(){this.stateStack.shift()};
Interpreter.prototype.stepFunctionExpression=function(){var a=this.stateStack[0];this.stateStack.shift();this.stateStack[0].value=this.createFunction(a.node)};Interpreter.prototype.stepIdentifier=function(){var a=this.stateStack[0];this.stateStack.shift();var b=this.createPrimitive(a.node.name);this.stateStack[0].value=a.components?b:this.getValueFromScope(b)};Interpreter.prototype.stepIfStatement=Interpreter.prototype.stepConditionalExpression;
Interpreter.prototype.stepLabeledStatement=function(){var a=this.stateStack.shift();this.stateStack.unshift({node:a.node.body,label:a.node.label.name})};Interpreter.prototype.stepLiteral=function(){var a=this.stateStack[0];this.stateStack.shift();this.stateStack[0].value=this.createPrimitive(a.node.value)};
Interpreter.prototype.stepLogicalExpression=function(){var a=this.stateStack[0],b=a.node;if("&&"!=b.operator&&"||"!=b.operator)throw"Unknown logical operator: "+b.operator;a.doneLeft_?a.doneRight_?(this.stateStack.shift(),this.stateStack[0].value=a.value):"&&"==b.operator&&!a.value.toBoolean()||"||"==b.operator&&a.value.toBoolean()?(this.stateStack.shift(),this.stateStack[0].value=a.value):(a.doneRight_=!0,this.stateStack.unshift({node:b.right})):(a.doneLeft_=!0,this.stateStack.unshift({node:b.left}))};
Interpreter.prototype.stepMemberExpression=function(){var a=this.stateStack[0],b=a.node;a.doneObject_?a.doneProperty_?(this.stateStack.shift(),this.stateStack[0].value=a.components?[a.object,a.value]:this.getProperty(a.object,a.value)):(a.doneProperty_=!0,a.object=a.value,this.stateStack.unshift({node:b.property,components:!b.computed})):(a.doneObject_=!0,this.stateStack.unshift({node:b.object}))};Interpreter.prototype.stepNewExpression=Interpreter.prototype.stepCallExpression;
Interpreter.prototype.stepObjectExpression=function(){var a=this.stateStack[0],b=a.node,c=a.valueToggle,d=a.n||0;a.object?c?a.key=a.value:this.setProperty(a.object,a.key,a.value):a.object=this.createObject(this.OBJECT);b.properties[d]?(c?(a.n=d+1,this.stateStack.unshift({node:b.properties[d].value})):this.stateStack.unshift({node:b.properties[d].key,components:!0}),a.valueToggle=!c):(this.stateStack.shift(),this.stateStack[0].value=a.object)};Interpreter.prototype.stepProgram=Interpreter.prototype.stepBlockStatement;
Interpreter.prototype.stepReturnStatement=function(){var a=this.stateStack[0],b=a.node;if(b.argument&&!a.done)a.done=!0,this.stateStack.unshift({node:b.argument});else{b=a.value||this.UNDEFINED;do{this.stateStack.shift();if(0==this.stateStack.length)throw new SyntaxError("Illegal return statement");a=this.stateStack[0]}while("CallExpression"!=a.node.type);a.value=b}};
Interpreter.prototype.stepSequenceExpression=function(){var a=this.stateStack[0],b=a.node,c=a.n||0;b.expressions[c]?(a.n=c+1,this.stateStack.unshift({node:b.expressions[c]})):(this.stateStack.shift(),this.stateStack[0].value=a.value)};Interpreter.prototype.stepThisExpression=function(){this.stateStack.shift();for(var a=0;a<this.stateStack.length;a++)if(this.stateStack[a].thisExpression){this.stateStack[0].value=this.stateStack[a].thisExpression;return}throw"No this expression found.";};
Interpreter.prototype.stepThrowStatement=function(){var a=this.stateStack[0],b=a.node;if(a.argument)throw a.value.toString();a.argument=!0;this.stateStack.unshift({node:b.argument})};
Interpreter.prototype.stepUnaryExpression=function(){var a=this.stateStack[0],b=a.node;if(a.done){this.stateStack.shift();if("-"==b.operator)a=-a.value.toNumber();else if("!"==b.operator)a=!a.value.toNumber();else if("~"==b.operator)a=~a.value.toNumber();else if("typeof"==b.operator)a=a.value.type;else if("delete"==b.operator)a.value.length?(b=a.value[0],a=a.value[1]):(b=this.getScope(),a=a.value),a=this.deleteProperty(b,a);else if("void"==b.operator)a=void 0;else throw"Unknown unary operator: "+
b.operator;this.stateStack[0].value=this.createPrimitive(a)}else a.done=!0,a={node:b.argument},"delete"==b.operator&&(a.components=!0),this.stateStack.unshift(a)};
Interpreter.prototype.stepUpdateExpression=function(){var a=this.stateStack[0],b=a.node;if(a.done){this.stateStack.shift();var a=a.value,c=this.getValue(a).toNumber(),d;if("++"==b.operator)d=this.createPrimitive(c+1);else if("--"==b.operator)d=this.createPrimitive(c-1);else throw"Unknown update expression: "+b.operator;this.setValue(a,d);var e=b.prefix?e:c;this.stateStack[0].value=this.createPrimitive(e)}else a.done=!0,this.stateStack.unshift({node:b.argument,components:!0})};
Interpreter.prototype.stepVariableDeclaration=function(){var a=this.stateStack[0],b=a.node,c=a.n||0;b.declarations[c]?(a.n=c+1,this.stateStack.unshift({node:b.declarations[c]})):this.stateStack.shift()};Interpreter.prototype.stepVariableDeclarator=function(){var a=this.stateStack[0],b=a.node;if(b.init&&!a.done)a.done=!0,this.stateStack.unshift({node:b.init});else{if(!this.hasProperty(this,b.id.name)||b.init)a=b.init?a.value:this.UNDEFINED,this.setValue(this.createPrimitive(b.id.name),a);this.stateStack.shift()}};
Interpreter.prototype.stepWhileStatement=Interpreter.prototype.stepDoWhileStatement;window.Interpreter=Interpreter;Interpreter.prototype.step=Interpreter.prototype.step;Interpreter.prototype.run=Interpreter.prototype.run;
