mathjs/math.min.js

/**
 * math.js
 * https://github.com/josdejong/mathjs
 *
 * Math.js is an extensive math library for JavaScript and Node.js,
 * It features real and complex numbers, units, matrices, a large set of
 * mathematical functions, and a flexible expression parser.
 *
 * @version 0.5.0-SNAPSHOT
 * @date    2013-03-31
 *
 * @license
 * Copyright (C) 2013 Jos de Jong <wjosdejong@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
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this.nodes[n]=i,this.firstNode||(this.firstNode=i),this.lastNode&&(this.lastNode.nextNode=i),this.lastNode=i,this._update([n]),n},e.prototype.insertBefore=function(t,n){var r=this.nodes[n];if(!r)throw'Node with id "'+n+'" not found';var a=r.previousNode,i=this._getNewId(),o=a?a.scope:this.scope,s=new Dt.expr.Scope(o),f=new e.Node({id:i,expression:t,parser:this.parser,scope:s,nextNode:r,previousNode:a});this.nodes[i]=f,a?a.nextNode=f:this.firstNode=f,r.previousNode=f,r.scope.parentScope=f.scope;var u=this.getDependencies(i);return-1==u.indexOf(i)&&u.unshift(i),this._update(u),i},e.prototype.insertAfter=function(e,t){var n=this.nodes[t];if(!n)throw'Node with id "'+t+'" not found';return n==this.lastNode?this.append(e):this.insertBefore(t+1,e)},e.prototype.remove=function(e){var t=this.nodes[e];if(!t)throw'Node with id "'+e+'" not found';var n=this.getDependencies(e),r=t.previousNode,a=t.nextNode;r?r.nextNode=a:this.firstNode=a,a?a.previousNode=r:this.lastNode=r;var i=r?r.scope:this.scope;a&&(a.scope.parentScope=i),delete this.nodes[e],this._update(n)},e.prototype.replace=function(t,n){var r=this.nodes[n];if(!r)throw'Node with id "'+n+'" not found';var a=[n];e._merge(a,this.getDependencies(n));var i=r.previousNode;r.nextNode,i?i.scope:this.scope,r.setExpr(t),e._merge(a,this.getDependencies(n)),this._update(a)},e.Node=function(e){this.id=e.id,this.parser=e.parser,this.scope=e.scope,this.nextNode=e.nextNode,this.previousNode=e.previousNode,this.updateSeq=0,this.result=void 0,this.setExpr(e.expression)},e.Node.prototype.setExpr=function(e){this.expression=e||"",this.scope.clear(),this._parse()},e.Node.prototype.getExpr=function(){return this.expression},e.Node.prototype.getResult=function(){return this.result},e.Node.prototype._parse=function(){try{this.fn=this.parser.parse(this.expression,this.scope)}catch(e){var t="Error: "+((e.message||e)+"");this.fn=new Pt(t)}},e.Node.prototype.eval=function(){try{this.scope.init(),this.result=this.fn.eval()}catch(e){this.scope.init(),this.result="Error: "+((e.message||e)+"")}return this.result},e._merge=function(e,t){for(var n=0,r=t.length;r>n;n++){var a=t[n];-1==e.indexOf(a)&&e.push(a)}},e.prototype.getDependencies=function(t){var n,r=[],a=this.nodes[t];if(a){var i=a.scope.defs,o=a.scope.updates,s=[];for(n in i)i.hasOwnProperty(n)&&s.push(n);for(n in o)o.hasOwnProperty(n)&&-1==s.indexOf(n)&&s.push(n);for(var f=a.nextNode;f&&s.length;){for(var u=f.scope,l=0;s.length>l;){if(n=s[l],(u.hasLink(n)||u.hasUpdate(n))&&-1==r.indexOf(f.id)){r.push(f.id);var c=this.getDependencies(f.id);e._merge(r,c)}u.hasDef(n)&&(s.splice(l,1),l--),l++}f=f.nextNode}}return r},e.prototype.getExpr=function(e){var t=this.nodes[e];if(!t)throw'Node with id "'+e+'" not found';return t.getExpr()},e.prototype.getResult=function(e){var t=this.nodes[e];if(!t)throw'Node with id "'+e+'" not found';return t.getResult()},e.prototype._update=function(e){this.updateSeq++;for(var t=this.updateSeq,n=this.nodes,r=0,a=e.length;a>r;r++){var i=e[r],o=n[i];o&&(o.eval(),o.updateSeq=t)}},e.prototype.getChanges=function(e){var t=[],n=this.firstNode;for(e=e||0;n;)n.updateSeq>e&&t.push(n.id),n=n.nextNode;return{ids:t,updateSeq:this.updateSeq}},e.prototype._getNewId=function(){return this.idMax++,this.idMax},e.prototype.toString=function(){return JSON.stringify(this.toJSON())},e.prototype.toJSON=function(){for(var e=[],t=this.firstNode;t;){var n={id:t.id,expression:t.expression,dependencies:this.getDependencies(t.id)};try{n.result=t.getResult()}catch(r){n.result="Error: "+((r.message||r)+"")}e.push(n),t=t.nextNode}return e}}()})();