__quiet = false;
__magicNoPrint = { __magicNoPrint : 1111 }

chatty = function(s){
    if ( ! __quiet )
        print( s );
}

friendlyEqual = function( a , b ){
    if ( a == b )
        return true;

    if ( tojson( a ) == tojson( b ) )
        return true;

    return false;
}

doassert = function (msg) {
    if (msg.indexOf("assert") == 0)
        print(msg);
    else
        print("assert: " + msg);
    throw msg;
}

assert = function( b , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    if ( b )
        return;
    
    doassert( msg == undefined ? "assert failed" : "assert failed : " + msg );
}

assert.automsg = function( b ) {
    assert( eval( b ), b );
}

assert._debug = false;

assert.eq = function( a , b , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    if ( a == b )
        return;

    if ( ( a != null && b != null ) && friendlyEqual( a , b ) )
        return;

    doassert( "[" + tojson( a ) + "] != [" + tojson( b ) + "] are not equal : " + msg );
}

assert.eq.automsg = function( a, b ) {
    assert.eq( eval( a ), eval( b ), "[" + a + "] != [" + b + "]" );
}

assert.neq = function( a , b , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );
    if ( a != b )
        return;

    doassert( "[" + a + "] != [" + b + "] are equal : " + msg );
}

assert.repeat = function( f, msg, timeout, interval ) {
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    var start = new Date();
    timeout = timeout || 30000;
    interval = interval || 200;
    var last;
    while( 1 ) {
        
        if ( typeof( f ) == "string" ){
            if ( eval( f ) )
                return;
        }
        else {
            if ( f() )
                return;
        }
        
        if ( ( new Date() ).getTime() - start.getTime() > timeout )
            break;
        sleep( interval );
    }
}
    
assert.soon = function( f, msg, timeout, interval ) {
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    var start = new Date();
    timeout = timeout || 30000;
    interval = interval || 200;
    var last;
    while( 1 ) {
        
        if ( typeof( f ) == "string" ){
            if ( eval( f ) )
                return;
        }
        else {
            if ( f() )
                return;
        }
        
        if ( ( new Date() ).getTime() - start.getTime() > timeout )
            doassert( "assert.soon failed: " + f + ", msg:" + msg );
        sleep( interval );
    }
}

assert.throws = function( func , params , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );
    try {
        func.apply( null , params );
    }
    catch ( e ){
        return e;
    }

    doassert( "did not throw exception: " + msg );
}

assert.throws.automsg = function( func, params ) {
    assert.throws( func, params, func.toString() );
}

assert.commandWorked = function( res , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    if ( res.ok == 1 )
        return;
    
    doassert( "command failed: " + tojson( res ) + " : " + msg );
}

assert.commandFailed = function( res , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    if ( res.ok == 0 )
        return;
    
    doassert( "command worked when it should have failed: " + tojson( res ) + " : " + msg );
}

assert.isnull = function( what , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    if ( what == null )
        return;
    
    doassert( "supposed to null (" + ( msg || "" ) + ") was: " + tojson( what ) );
}

assert.lt = function( a , b , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    if ( a < b )
        return;
    doassert( a + " is not less than " + b + " : " + msg );
}

assert.gt = function( a , b , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    if ( a > b )
        return;
    doassert( a + " is not greater than " + b + " : " + msg );
}

assert.lte = function( a , b , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    if ( a <= b )
        return;
    doassert( a + " is not less than or eq " + b + " : " + msg );
}

assert.gte = function( a , b , msg ){
    if ( assert._debug && msg ) print( "in assert for: " + msg );

    if ( a >= b )
        return;
    doassert( a + " is not greater than or eq " + b + " : " + msg );
}


assert.close = function( a , b , msg , places ){
    if (places === undefined) {
        places = 4;
    }
    if (Math.round((a - b) * Math.pow(10, places)) === 0) {
        return;
    }
    doassert( a + " is not equal to " + b + " within " + places +
              " places, diff: " + (a-b) + " : " + msg );
};

Object.extend = function( dst , src , deep ){
    for ( var k in src ){
        var v = src[k];
        if ( deep && typeof(v) == "object" ){
            v = Object.extend( typeof ( v.length ) == "number" ? [] : {} , v , true );
        }
        dst[k] = v;
    }
    return dst;
}

argumentsToArray = function( a ){
    var arr = [];
    for ( var i=0; i<a.length; i++ )
        arr[i] = a[i];
    return arr;
}

isString = function( x ){
    return typeof( x ) == "string";
}

isNumber = function(x){
    return typeof( x ) == "number";
}

isObject = function( x ){
    return typeof( x ) == "object";
}

String.prototype.trim = function() {
    return this.replace(/^\s+|\s+$/g,"");
}
String.prototype.ltrim = function() {
    return this.replace(/^\s+/,"");
}
String.prototype.rtrim = function() {
    return this.replace(/\s+$/,"");
}

Date.timeFunc = function( theFunc , numTimes ){

    var start = new Date();
    
    numTimes = numTimes || 1;
    for ( var i=0; i<numTimes; i++ ){
        theFunc.apply( null , argumentsToArray( arguments ).slice( 2 ) );
    }

    return (new Date()).getTime() - start.getTime();
}

Date.prototype.tojson = function(){
    return "\"" + this.toString() + "\"";
}

RegExp.prototype.tojson = RegExp.prototype.toString;

Array.contains = function( a  , x ){
    for ( var i=0; i<a.length; i++ ){
        if ( a[i] == x )
            return true;
    }
    return false;
}

Array.unique = function( a ){
    var u = [];
    for ( var i=0; i<a.length; i++){
        var o = a[i];
        if ( ! Array.contains( u , o ) ){
            u.push( o );
        }
    }
    return u;
}

Array.shuffle = function( arr ){
    for ( var i=0; i<arr.length-1; i++ ){
        var pos = i+Random.randInt(arr.length-i);
        var save = arr[i];
        arr[i] = arr[pos];
        arr[pos] = save;
    }
    return arr;
}


Array.tojson = function( a , indent ){
    if (!indent) 
        indent = "";

    if (a.length == 0) {
        return "[ ]";
    }

    var s = "[\n";
    indent += "\t";
    for ( var i=0; i<a.length; i++){
        s += indent + tojson( a[i], indent );
        if ( i < a.length - 1 ){
            s += ",\n";
        }
    }
    if ( a.length == 0 ) {
        s += indent;
    }

    indent = indent.substring(1);
    s += "\n"+indent+"]";
    return s;
}

Array.fetchRefs = function( arr , coll ){
    var n = [];
    for ( var i=0; i<arr.length; i ++){
        var z = arr[i];
        if ( coll && coll != z.getCollection() )
            continue;
        n.push( z.fetch() );
    }
    
    return n;
}

Array.sum = function( arr ){
    if ( arr.length == 0 )
        return null;
    var s = arr[0];
    for ( var i=1; i<arr.length; i++ )
        s += arr[i];
    return s;
}

Array.avg = function( arr ){
    if ( arr.length == 0 )
        return null;
    return Array.sum( arr ) / arr.length;
}

Array.stdDev = function( arr ){
    var avg = Array.avg( arr );
    var sum = 0;

    for ( var i=0; i<arr.length; i++ ){
        sum += Math.pow( arr[i] - avg , 2 );
    }

    return Math.sqrt( sum / arr.length );
}

Object.keySet = function( o ) {
    var ret = new Array();
    for( i in o ) {
        if ( !( i in o.__proto__ && o[ i ] === o.__proto__[ i ] ) ) {
            ret.push( i );
        }
    }
    return ret;
}

if ( ! NumberLong.prototype ) {
    NumberLong.prototype = {}
}

NumberLong.prototype.tojson = function() {
    return this.toString();
}

if ( ! ObjectId.prototype )
    ObjectId.prototype = {}

ObjectId.prototype.toString = function(){
    return this.str;
}

ObjectId.prototype.tojson = function(){
    return "ObjectId(\"" + this.str + "\")";
}

ObjectId.prototype.isObjectId = true;

ObjectId.prototype.getTimestamp = function(){
    return new Date(parseInt(this.toString().slice(0,8), 16)*1000);
}

ObjectId.prototype.equals = function( other){
    return this.str == other.str;
}

if ( typeof( DBPointer ) != "undefined" ){
    DBPointer.prototype.fetch = function(){
        assert( this.ns , "need a ns" );
        assert( this.id , "need an id" );
        
        return db[ this.ns ].findOne( { _id : this.id } );
    }
    
    DBPointer.prototype.tojson = function(indent){
        return tojson({"ns" : this.ns, "id" : this.id}, indent);
    }

    DBPointer.prototype.getCollection = function(){
        return this.ns;
    }
    
    DBPointer.prototype.toString = function(){
        return "DBPointer " + this.ns + ":" + this.id;
    }
}
else {
    print( "warning: no DBPointer" );
}

if ( typeof( DBRef ) != "undefined" ){
    DBRef.prototype.fetch = function(){
        assert( this.$ref , "need a ns" );
        assert( this.$id , "need an id" );
        
        return db[ this.$ref ].findOne( { _id : this.$id } );
    }
    
    DBRef.prototype.tojson = function(indent){
        return tojson({"$ref" : this.$ref, "$id" : this.$id}, indent);
    }

    DBRef.prototype.getCollection = function(){
        return this.$ref;
    }
    
    DBRef.prototype.toString = function(){
        return this.tojson();
    }
}
else {
    print( "warning: no DBRef" );
}

if ( typeof( BinData ) != "undefined" ){
    BinData.prototype.tojson = function () {
        //return "BinData type: " + this.type + " len: " + this.len;
        return this.toString();
    }
}
else {
    print( "warning: no BinData class" );
}

if ( typeof( UUID ) != "undefined" ){
    UUID.prototype.tojson = function () {
        return this.toString();
    }
}

if ( typeof _threadInject != "undefined" ){
    print( "fork() available!" );
    
    Thread = function(){
        this.init.apply( this, arguments );
    }
    _threadInject( Thread.prototype );
    
    ScopedThread = function() {
        this.init.apply( this, arguments );
    }
    ScopedThread.prototype = new Thread( function() {} );
    _scopedThreadInject( ScopedThread.prototype );
    
    fork = function() {
        var t = new Thread( function() {} );
        Thread.apply( t, arguments );
        return t;
    }    

    // Helper class to generate a list of events which may be executed by a ParallelTester
    EventGenerator = function( me, collectionName, mean ) {
        this.mean = mean;
        this.events = new Array( me, collectionName );
    }
    
    EventGenerator.prototype._add = function( action ) {
        this.events.push( [ Random.genExp( this.mean ), action ] );
    }
    
    EventGenerator.prototype.addInsert = function( obj ) {
        this._add( "t.insert( " + tojson( obj ) + " )" );
    }

    EventGenerator.prototype.addRemove = function( obj ) {
        this._add( "t.remove( " + tojson( obj ) + " )" );
    }

    EventGenerator.prototype.addUpdate = function( objOld, objNew ) {
        this._add( "t.update( " + tojson( objOld ) + ", " + tojson( objNew ) + " )" );
    }
    
    EventGenerator.prototype.addCheckCount = function( count, query, shouldPrint, checkQuery ) {
        query = query || {};
        shouldPrint = shouldPrint || false;
        checkQuery = checkQuery || false;
        var action = "assert.eq( " + count + ", t.count( " + tojson( query ) + " ) );"
        if ( checkQuery ) {
            action += " assert.eq( " + count + ", t.find( " + tojson( query ) + " ).toArray().length );"
        }
        if ( shouldPrint ) {
            action += " print( me + ' ' + " + count + " );";
        }
        this._add( action );
    }
    
    EventGenerator.prototype.getEvents = function() {
        return this.events;
    }
    
    EventGenerator.dispatch = function() {
        var args = argumentsToArray( arguments );
        var me = args.shift();
        var collectionName = args.shift();
        var m = new Mongo( db.getMongo().host );
        var t = m.getDB( "test" )[ collectionName ];
        for( var i in args ) {
            sleep( args[ i ][ 0 ] );
            eval( args[ i ][ 1 ] );
        }
    }
    
    // Helper class for running tests in parallel.  It assembles a set of tests
    // and then calls assert.parallelests to run them.
    ParallelTester = function() {
        this.params = new Array();
    }
    
    ParallelTester.prototype.add = function( fun, args ) {
        args = args || [];
        args.unshift( fun );
        this.params.push( args );
    }
    
    ParallelTester.prototype.run = function( msg, newScopes ) {
        newScopes = newScopes || false;
        assert.parallelTests( this.params, msg, newScopes );
    }
    
    // creates lists of tests from jstests dir in a format suitable for use by
    // ParallelTester.fileTester.  The lists will be in random order.
    // n: number of lists to split these tests into
    ParallelTester.createJstestsLists = function( n ) {
        var params = new Array();
        for( var i = 0; i < n; ++i ) {
            params.push( [] );
        }

        var makeKeys = function( a ) {
            var ret = {};
            for( var i in a ) {
                ret[ a[ i ] ] = 1;
            }
            return ret;
        }
        
        // some tests can't run in parallel with most others
        var skipTests = makeKeys( [ "jstests/dbadmin.js",
                                   "jstests/repair.js",
                                   "jstests/cursor8.js",
                                   "jstests/recstore.js",
                                   "jstests/extent.js",
                                   "jstests/indexb.js",
                                   "jstests/profile1.js",
                                   "jstests/mr3.js",
                                   "jstests/indexh.js",
                                   "jstests/apitest_db.js",
                                   "jstests/evalb.js"] );
        
        // some tests can't be run in parallel with each other
        var serialTestsArr = [ "jstests/fsync.js",
                              "jstests/fsync2.js" ];
        var serialTests = makeKeys( serialTestsArr );
        
        params[ 0 ] = serialTestsArr;
        
        var files = listFiles("jstests");
        files = Array.shuffle( files );
        
        var i = 0;
        files.forEach(
                      function(x) {
                      
                      if ( ( /[\/\\]_/.test(x.name) ) ||
                          ( ! /\.js$/.test(x.name ) ) ||
                          ( x.name in skipTests ) ||
                          ( x.name in serialTests ) ||
                          ! /\.js$/.test(x.name ) ){ 
                      print(" >>>>>>>>>>>>>>> skipping " + x.name);
                      return;
                      }
                      
                      params[ i % n ].push( x.name );
                      ++i;
                      }
        );
        
        // randomize ordering of the serialTests
        params[ 0 ] = Array.shuffle( params[ 0 ] );
        
        for( var i in params ) {
            params[ i ].unshift( i );
        }
        
        return params;
    }
    
    // runs a set of test files
    // first argument is an identifier for this tester, remaining arguments are file names
    ParallelTester.fileTester = function() {
        var args = argumentsToArray( arguments );
        var suite = args.shift();
        args.forEach(
                     function( x ) {
                     print("         S" + suite + " Test : " + x + " ...");
                     var time = Date.timeFunc( function() { load(x); }, 1);
                     print("         S" + suite + " Test : " + x + " " + time + "ms" );
                     }
                     );        
    }
    
    // params: array of arrays, each element of which consists of a function followed
    // by zero or more arguments to that function.  Each function and its arguments will
    // be called in a separate thread.
    // msg: failure message
    // newScopes: if true, each thread starts in a fresh scope
    assert.parallelTests = function( params, msg, newScopes ) {
        newScopes = newScopes || false;
        var wrapper = function( fun, argv ) {
                   eval (
                         "var z = function() {" +
                         "var __parallelTests__fun = " + fun.toString() + ";" +
                         "var __parallelTests__argv = " + tojson( argv ) + ";" +
                         "var __parallelTests__passed = false;" +
                         "try {" +
                            "__parallelTests__fun.apply( 0, __parallelTests__argv );" +
                            "__parallelTests__passed = true;" +
                         "} catch ( e ) {" +
                            "print( e );" +
                         "}" +
                         "return __parallelTests__passed;" +
                         "}"
                         );
            return z;
        }
        var runners = new Array();
        for( var i in params ) {
            var param = params[ i ];
            var test = param.shift();
            var t;
            if ( newScopes )
                t = new ScopedThread( wrapper( test, param ) );
            else
                t = new Thread( wrapper( test, param ) );
            runners.push( t );
        }
        
        runners.forEach( function( x ) { x.start(); } );
        var nFailed = 0;
        // v8 doesn't like it if we exit before all threads are joined (SERVER-529)
        runners.forEach( function( x ) { if( !x.returnData() ) { ++nFailed; } } );        
        assert.eq( 0, nFailed, msg );
    }
}

tojsononeline = function( x ){
    return tojson( x , " " , true );
}

tojson = function( x, indent , nolint ){
    if ( x === null )
        return "null";
    
    if ( x === undefined )
        return "undefined";
    
    if (!indent) 
        indent = "";

    switch ( typeof x ) {
    case "string": {
        var s = "\"";
        for ( var i=0; i<x.length; i++ ){
            switch (x[i]){
                case '"': s += '\\"'; break;
                case '\\': s += '\\\\'; break;
                case '\b': s += '\\b'; break;
                case '\f': s += '\\f'; break;
                case '\n': s += '\\n'; break;
                case '\r': s += '\\r'; break;
                case '\t': s += '\\t'; break;

                default: {
                    var code = x.charCodeAt(i);
                    if (code < 0x20){
                        s += (code < 0x10 ? '\\u000' : '\\u00') + code.toString(16);
                    } else {
                        s += x[i];
                    }
                }
            }
        }
        return s + "\"";
    }
    case "number": 
    case "boolean":
        return "" + x;
    case "object":{
        var s = tojsonObject( x, indent , nolint );
        if ( ( nolint == null || nolint == true ) && s.length < 80 && ( indent == null || indent.length == 0 ) ){
            s = s.replace( /[\s\r\n ]+/gm , " " );
        }
        return s;
    }
    case "function":
        return x.toString();
    default:
        throw "tojson can't handle type " + ( typeof x );
    }
    
}

tojsonObject = function( x, indent , nolint ){
    var lineEnding = nolint ? " " : "\n";
    var tabSpace = nolint ? "" : "\t";
    
    assert.eq( ( typeof x ) , "object" , "tojsonObject needs object, not [" + ( typeof x ) + "]" );

    if (!indent) 
        indent = "";
    
    if ( typeof( x.tojson ) == "function" && x.tojson != tojson ) {
        return x.tojson(indent,nolint);
    }
    
    if ( x.constructor && typeof( x.constructor.tojson ) == "function" && x.constructor.tojson != tojson ) {
        return x.constructor.tojson( x, indent , nolint );
    }

    if ( x.toString() == "[object MaxKey]" )
        return "{ $maxKey : 1 }";
    if ( x.toString() == "[object MinKey]" )
        return "{ $minKey : 1 }";
    
    var s = "{" + lineEnding;

    // push one level of indent
    indent += tabSpace;
    
    var total = 0;
    for ( var k in x ) total++;
    if ( total == 0 ) {
        s += indent + lineEnding;
    }

    var keys = x;
    if ( typeof( x._simpleKeys ) == "function" )
        keys = x._simpleKeys();
    var num = 1;
    for ( var k in keys ){
        
        var val = x[k];
        if ( val == DB.prototype || val == DBCollection.prototype )
            continue;

        s += indent + "\"" + k + "\" : " + tojson( val, indent , nolint );
        if (num != total) {
            s += ",";
            num++;
        }
        s += lineEnding;
    }

    // pop one level of indent
    indent = indent.substring(1);
    return s + indent + "}";
}

shellPrint = function( x ){
    it = x;
    if ( x != undefined )
        shellPrintHelper( x );
    
    if ( db ){
        var e = db.getPrevError();
        if ( e.err ) {
	    if( e.nPrev <= 1 )
		print( "error on last call: " + tojson( e.err ) );
	    else
		print( "an error " + tojson(e.err) + " occurred " + e.nPrev + " operations back in the command invocation" );
        }
        db.resetError();
    }
}

printjson = function(x){
    print( tojson( x ) );
}

printjsononeline = function(x){
    print( tojsononeline( x ) );
}

shellPrintHelper = function( x ){

    if ( typeof( x ) == "undefined" ){

        if ( typeof( db ) != "undefined" && db.getLastError ){
            var e = db.getLastError();
            if ( e != null )
                print( e );
        }

        return;
    }
    
    if ( x == __magicNoPrint )
        return;

    if ( x == null ){
        print( "null" );
        return;
    }

    if ( typeof x != "object" ) 
        return print( x );
    
    var p = x.shellPrint;
    if ( typeof p == "function" )
        return x.shellPrint();

    var p = x.tojson;
    if ( typeof p == "function" )
        print( x.tojson() );
    else
        print( tojson( x ) );
}

shellAutocomplete = function( prefix ){
    var a = [];
    //a.push( prefix + "z" )
    //a.push( prefix + "y" )
    __autocomplete__ = a;
}

shellHelper = function( command , rest , shouldPrint ){
    command = command.trim();
    var args = rest.trim().replace(/;$/,"").split( "\s+" );
    
    if ( ! shellHelper[command] )
        throw "no command [" + command + "]";
    
    var res = shellHelper[command].apply( null , args );
    if ( shouldPrint ){
        shellPrintHelper( res );
    }
    return res;
}

shellHelper.use = function( dbname ){
    db = db.getMongo().getDB( dbname );
    print( "switched to db " + db.getName() );
}

shellHelper.it = function(){
    if ( typeof( ___it___ ) == "undefined" || ___it___ == null ){
        print( "no cursor" );
        return;
    }
    shellPrintHelper( ___it___ );
}

shellHelper.show = function( what ){
    assert( typeof what == "string" );
    
    if( what == "profile" ) { 
	if( db.system.profile.count() == 0 ) { 
	    print("db.system.profile is empty");
	    print("Use db.setProfilingLevel(2) will enable profiling");
	    print("Use db.system.profile.find() to show raw profile entries");
	} 
	else { 
	    print(); 
	    db.system.profile.find({ millis : { $gt : 0 } }).sort({$natural:-1}).limit(5).forEach( function(x){print(""+x.millis+"ms " + String(x.ts).substring(0,24)); print(x.info); print("\n");} )
        }
	return "";
    }

    if ( what == "users" ){
	db.system.users.find().forEach( printjson );
        return "";
    }

    if ( what == "collections" || what == "tables" ) {
        db.getCollectionNames().forEach( function(x){print(x)} );
	return "";
    }
    
    if ( what == "dbs" ) {
        db.getMongo().getDBNames().sort().forEach( function(x){print(x)} );
	return "";
    }
    
    throw "don't know how to show [" + what + "]";

}

if ( typeof( Map ) == "undefined" ){
    Map = function(){
        this._data = {};
    }
}

Map.hash = function( val ){
    if ( ! val )
        return val;

    switch ( typeof( val ) ){
    case 'string':
    case 'number':
    case 'date':
        return val.toString();
    case 'object':
    case 'array':
        var s = "";
        for ( var k in val ){
            s += k + val[k];
        }
        return s;
    }

    throw "can't hash : " + typeof( val );
}

Map.prototype.put = function( key , value ){
    var o = this._get( key );
    var old = o.value;
    o.value = value;
    return old;
}

Map.prototype.get = function( key ){
    return this._get( key ).value;
}

Map.prototype._get = function( key ){
    var h = Map.hash( key );
    var a = this._data[h];
    if ( ! a ){
        a = [];
        this._data[h] = a;
    }
    
    for ( var i=0; i<a.length; i++ ){
        if ( friendlyEqual( key , a[i].key ) ){
            return a[i];
        }
    }
    var o = { key : key , value : null };
    a.push( o );
    return o;
}

Map.prototype.values = function(){
    var all = [];
    for ( var k in this._data ){
        this._data[k].forEach( function(z){ all.push( z.value ); } );
    }
    return all;
}

if ( typeof( gc ) == "undefined" ){
    gc = function(){
        print( "warning: using noop gc()" );
    }
}
   

Math.sigFig = function( x , N ){
    if ( ! N ){
        N = 3;
    }
    var p = Math.pow( 10, N - Math.ceil( Math.log( Math.abs(x) ) / Math.log( 10 )) );
    return Math.round(x*p)/p;
}

Random = function() {}

// set random seed
Random.srand = function( s ) { _srand( s ); }

// random number 0 <= r < 1
Random.rand = function() { return _rand(); }

// random integer 0 <= r < n
Random.randInt = function( n ) { return Math.floor( Random.rand() * n ); }

Random.setRandomSeed = function( s ) {
    s = s || new Date().getTime();
    print( "setting random seed: " + s );
    Random.srand( s );
}

// generate a random value from the exponential distribution with the specified mean
Random.genExp = function( mean ) {
    return -Math.log( Random.rand() ) * mean;
}

killWithUris = function( uris ) {
    var inprog = db.currentOp().inprog;
    for( var u in uris ) {
        for ( var i in inprog ) {
            if ( uris[ u ] == inprog[ i ].client ) {
                db.killOp( inprog[ i ].opid );
            }
        }
    }
}

Geo = {};
Geo.distance = function( a , b ){
    var ax = null;
    var ay = null;
    var bx = null;
    var by = null;
    
    for ( var key in a ){
        if ( ax == null )
            ax = a[key];
        else if ( ay == null )
            ay = a[key];
    }
    
    for ( var key in b ){
        if ( bx == null )
            bx = b[key];
        else if ( by == null )
            by = b[key];
    }

    return Math.sqrt( Math.pow( by - ay , 2 ) + 
                      Math.pow( bx - ax , 2 ) );
}

rs = function () { return "try rs.help()"; }

rs.help = function () {
    print("\trs.status()                     { replSetGetStatus : 1 } checks repl set status");
    print("\trs.initiate()                   { replSetInitiate : null } initiates set with default settings");
    print("\trs.initiate(cfg)                { replSetInitiate : cfg } initiates set with configuration cfg");
    print("\trs.conf()                       get the current configuration object from local.system.replset");
    print("\trs.reconfig(cfg)                updates the configuration of a running replica set with cfg");
    print("\trs.add(hostportstr)             add a new member to the set with default attributes");
    print("\trs.add(membercfgobj)            add a new member to the set with extra attributes");
    print("\trs.addArb(hostportstr)          add a new member which is arbiterOnly:true");
    print("\trs.stepDown()                   step down as primary (momentarily)");
    print("\trs.remove(hostportstr)          remove a host from the replica set");
    print("\trs.slaveOk()                    shorthand for db.getMongo().setSlaveOk()");
    print();
    print("\tdb.isMaster()                   check who is primary");
    print();
    print("\tsee also http://<mongod_host>:28017/_replSet for additional diagnostic info");
}
rs.slaveOk = function () { return db.getMongo().setSlaveOk(); }
rs.status = function () { return db._adminCommand("replSetGetStatus"); }
rs.isMaster = function () { return db.isMaster(); }
rs.initiate = function (c) { return db._adminCommand({ replSetInitiate: c }); }
rs.reconfig = function(cfg) {
  cfg.version = rs.conf().version + 1;

  return db._adminCommand({ replSetReconfig: cfg });
}
rs.add = function (hostport, arb) {
    var cfg = hostport;

    var local = db.getSisterDB("local");
    assert(local.system.replset.count() <= 1, "error: local.system.replset has unexpected contents");
    var c = local.system.replset.findOne();
    assert(c, "no config object retrievable from local.system.replset");

    c.version++;

    var max = 0;
    for (var i in c.members)
        if (c.members[i]._id > max) max = c.members[i]._id;
    if (isString(hostport)) {
        cfg = { _id: max + 1, host: hostport };
        if (arb)
            cfg.arbiterOnly = true;
    }
    c.members.push(cfg);
    return db._adminCommand({ replSetReconfig: c });
}
rs.stepDown = function () { return db._adminCommand({ replSetStepDown:true}); }
rs.addArb = function (hn) { return this.add(hn, true); }
rs.conf = function () { return db.getSisterDB("local").system.replset.findOne(); }

rs.remove = function (hn) {
    var local = db.getSisterDB("local");
    assert(local.system.replset.count() <= 1, "error: local.system.replset has unexpected contents");
    var c = local.system.replset.findOne();
    assert(c, "no config object retrievable from local.system.replset");
    c.version++;

    for (var i in c.members) {
        if (c.members[i].host == hn) {
            c.members.splice(i, 1);
            return db._adminCommand({ replSetReconfig : c});
        }
    }

    return "error: couldn't find "+hn+" in "+tojson(c.members);
};

help = shellHelper.help = function (x) {
    if (x == "connect") {
        print("\nNormally one specifies the server on the mongo shell command line.  Run mongo --help to see those options.");
        print("Additional connections may be opened:\n");
        print("    var x = new Mongo('host[:port]');");
        print("    var mydb = x.getDB('mydb');");
        print("  or");
        print("    var mydb = connect('host[:port]/mydb');");
        print("\nNote: the REPL prompt only auto-reports getLastError() for the shell command line connection.\n");
        return;
    }
    if (x == "misc") {
        print("\tb = new BinData(subtype,base64str)  create a BSON BinData value");
        print("\tb.subtype()                         the BinData subtype (0..255)");
        print("\tb.length()                          length of the BinData data in bytes");
        print("\tb.hex()                             the data as a hex encoded string");
        print("\tb.base64()                          the data as a base 64 encoded string");
        print("\tb.toString()");
        return;
    }
    if (x == "admin") {
        print("\tls([path])                      list files");
        print("\tpwd()                           returns current directory");
        print("\tlistFiles([path])               returns file list");
        print("\thostname()                      returns name of this host");
        print("\tcat(fname)                      returns contents of text file as a string");
        print("\tremoveFile(f)                   delete a file");
        print("\tload(jsfilename)                load and execute a .js file");
        print("\trun(program[, args...])         spawn a program and wait for its completion");
        print("\tsleep(m)                        sleep m milliseconds");
        print("\tgetMemInfo()                    diagnostic");
        return;
    }
    if (x == "test") {
        print("\tstartMongodEmpty(args)        DELETES DATA DIR and then starts mongod");
        print("\t                              returns a connection to the new server");
        print("\tstartMongodTest()             DELETES DATA DIR");
        print("\t                              automatically picks port #s starting at 27000 and increasing");
        print("\t                              or you can specify the port as the first arg");
        print("\t                              dir is /data/db/<port>/ if not specified as the 2nd arg");
        print("\t                              returns a connection to the new server");
        return;
    }
    print("\t" + "db.help()                    help on db methods");
    print("\t" + "db.mycoll.help()             help on collection methods");
    print("\t" + "rs.help()                    help on replica set methods");
    print("\t" + "help connect                 connecting to a db help");
    print("\t" + "help admin                   administrative help");
    print("\t" + "help misc                    misc things to know");
    print();
    print("\t" + "show dbs                     show database names");
    print("\t" + "show collections             show collections in current database");
    print("\t" + "show users                   show users in current database");
    print("\t" + "show profile                 show most recent system.profile entries with time >= 1ms");
    print("\t" + "use <db_name>                set current database");
    print("\t" + "db.foo.find()                list objects in collection foo");
    print("\t" + "db.foo.find( { a : 1 } )     list objects in foo where a == 1");
    print("\t" + "it                           result of the last line evaluated; use to further iterate");
    print("\t" + "exit                         quit the mongo shell");
}