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engine_spidermonkey.cpp
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engine_spidermonkey.cpp
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// engine_spidermonkey.cpp
/* Copyright 2009 10gen Inc.
*
* 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.
*/
#include "pch.h"
#include "engine_spidermonkey.h"
#include "../client/dbclient.h"
#ifndef _WIN32
#include <boost/date_time/posix_time/posix_time.hpp>
#undef assert
#define assert MONGO_assert
#endif
#define smuassert( cx , msg , val ) \
if ( ! ( val ) ){ \
JS_ReportError( cx , msg ); \
return JS_FALSE; \
}
#define CHECKNEWOBJECT(xx,ctx,w) \
if ( ! xx ){ \
massert(13072,(string)"JS_NewObject failed: " + w ,xx); \
}
#define CHECKJSALLOC( newthing ) \
massert( 13615 , "JS allocation failed, either memory leak or using too much memory" , newthing )
namespace mongo {
class InvalidUTF8Exception : public UserException {
public:
InvalidUTF8Exception() : UserException( 9006 , "invalid utf8" ) {
}
};
string trim( string s ) {
while ( s.size() && isspace( s[0] ) )
s = s.substr( 1 );
while ( s.size() && isspace( s[s.size()-1] ) )
s = s.substr( 0 , s.size() - 1 );
return s;
}
boost::thread_specific_ptr<SMScope> currentScope( dontDeleteScope );
boost::recursive_mutex &smmutex = *( new boost::recursive_mutex );
#define smlock recursive_scoped_lock ___lk( smmutex );
#define GETHOLDER(x,o) ((BSONHolder*)JS_GetPrivate( x , o ))
class BSONFieldIterator;
class BSONHolder {
public:
BSONHolder( BSONObj obj ) {
_obj = obj.getOwned();
_inResolve = false;
_modified = false;
_magic = 17;
}
~BSONHolder() {
_magic = 18;
}
void check() {
uassert( 10212 , "holder magic value is wrong" , _magic == 17 && _obj.isValid() );
}
BSONFieldIterator * it();
BSONObj _obj;
bool _inResolve;
char _magic;
list<string> _extra;
set<string> _removed;
bool _modified;
};
class BSONFieldIterator {
public:
BSONFieldIterator( BSONHolder * holder ) {
set<string> added;
BSONObjIterator it( holder->_obj );
while ( it.more() ) {
BSONElement e = it.next();
if ( holder->_removed.count( e.fieldName() ) )
continue;
_names.push_back( e.fieldName() );
added.insert( e.fieldName() );
}
for ( list<string>::iterator i = holder->_extra.begin(); i != holder->_extra.end(); i++ ) {
if ( ! added.count( *i ) )
_names.push_back( *i );
}
_it = _names.begin();
}
bool more() {
return _it != _names.end();
}
string next() {
string s = *_it;
_it++;
return s;
}
private:
list<string> _names;
list<string>::iterator _it;
};
BSONFieldIterator * BSONHolder::it() {
return new BSONFieldIterator( this );
}
class TraverseStack {
public:
TraverseStack() {
_o = 0;
_parent = 0;
}
TraverseStack( JSObject * o , const TraverseStack * parent ) {
_o = o;
_parent = parent;
}
TraverseStack dive( JSObject * o ) const {
if ( o ) {
uassert( 13076 , (string)"recursive toObject" , ! has( o ) );
}
return TraverseStack( o , this );
}
int depth() const {
int d = 0;
const TraverseStack * s = _parent;
while ( s ) {
s = s->_parent;
d++;
}
return d;
}
bool isTop() const {
return _parent == 0;
}
bool has( JSObject * o ) const {
if ( ! o )
return false;
const TraverseStack * s = this;
while ( s ) {
if ( s->_o == o )
return true;
s = s->_parent;
}
return false;
}
JSObject * _o;
const TraverseStack * _parent;
};
class Convertor : boost::noncopyable {
public:
Convertor( JSContext * cx ) {
_context = cx;
}
string toString( JSString * so ) {
jschar * s = JS_GetStringChars( so );
size_t srclen = JS_GetStringLength( so );
if( srclen == 0 )
return "";
size_t len = srclen * 6; // we only need *3, but see note on len below
char * dst = (char*)malloc( len );
len /= 2;
// doc re weird JS_EncodeCharacters api claims len expected in 16bit
// units, but experiments suggest 8bit units expected. We allocate
// enough memory that either will work.
if ( !JS_EncodeCharacters( _context , s , srclen , dst , &len) ) {
StringBuilder temp;
temp << "Not proper UTF-16: ";
for ( size_t i=0; i<srclen; i++ ) {
if ( i > 0 )
temp << ",";
temp << s[i];
}
uasserted( 13498 , temp.str() );
}
string ss( dst , len );
free( dst );
if ( !JS_CStringsAreUTF8() )
for( string::const_iterator i = ss.begin(); i != ss.end(); ++i )
uassert( 10213 , "non ascii character detected", (unsigned char)(*i) <= 127 );
return ss;
}
string toString( jsval v ) {
return toString( JS_ValueToString( _context , v ) );
}
// NOTE No validation of passed in object
long long toNumberLongUnsafe( JSObject *o ) {
boost::uint64_t val;
if ( hasProperty( o, "top" ) ) {
val =
( (boost::uint64_t)(boost::uint32_t)getNumber( o , "top" ) << 32 ) +
( boost::uint32_t)( getNumber( o , "bottom" ) );
}
else {
val = (boost::uint64_t)(boost::int64_t) getNumber( o, "floatApprox" );
}
return val;
}
double toNumber( jsval v ) {
double d;
uassert( 10214 , "not a number" , JS_ValueToNumber( _context , v , &d ) );
return d;
}
bool toBoolean( jsval v ) {
JSBool b;
assert( JS_ValueToBoolean( _context, v , &b ) );
return b;
}
OID toOID( jsval v ) {
JSContext * cx = _context;
assert( JSVAL_IS_OID( v ) );
JSObject * o = JSVAL_TO_OBJECT( v );
OID oid;
oid.init( getString( o , "str" ) );
return oid;
}
BSONObj toObject( JSObject * o , const TraverseStack& stack=TraverseStack() ) {
if ( ! o )
return BSONObj();
if ( JS_InstanceOf( _context , o , &bson_ro_class , 0 ) ) {
BSONHolder * holder = GETHOLDER( _context , o );
assert( holder );
return holder->_obj.getOwned();
}
BSONObj orig;
if ( JS_InstanceOf( _context , o , &bson_class , 0 ) ) {
BSONHolder * holder = GETHOLDER(_context,o);
assert( holder );
if ( ! holder->_modified ) {
return holder->_obj;
}
orig = holder->_obj;
}
BSONObjBuilder b;
if ( ! appendSpecialDBObject( this , b , "value" , OBJECT_TO_JSVAL( o ) , o ) ) {
if ( stack.isTop() ) {
jsval theid = getProperty( o , "_id" );
if ( ! JSVAL_IS_VOID( theid ) ) {
append( b , "_id" , theid , EOO , stack.dive( o ) );
}
}
JSIdArray * properties = JS_Enumerate( _context , o );
assert( properties );
for ( jsint i=0; i<properties->length; i++ ) {
jsid id = properties->vector[i];
jsval nameval;
assert( JS_IdToValue( _context ,id , &nameval ) );
string name = toString( nameval );
if ( stack.isTop() && name == "_id" )
continue;
append( b , name , getProperty( o , name.c_str() ) , orig[name].type() , stack.dive( o ) );
}
JS_DestroyIdArray( _context , properties );
}
return b.obj();
}
BSONObj toObject( jsval v ) {
if ( JSVAL_IS_NULL( v ) ||
JSVAL_IS_VOID( v ) )
return BSONObj();
uassert( 10215 , "not an object" , JSVAL_IS_OBJECT( v ) );
return toObject( JSVAL_TO_OBJECT( v ) );
}
string getFunctionCode( JSFunction * func ) {
return toString( JS_DecompileFunction( _context , func , 0 ) );
}
string getFunctionCode( jsval v ) {
uassert( 10216 , "not a function" , JS_TypeOfValue( _context , v ) == JSTYPE_FUNCTION );
return getFunctionCode( JS_ValueToFunction( _context , v ) );
}
void appendRegex( BSONObjBuilder& b , const string& name , string s ) {
assert( s[0] == '/' );
s = s.substr(1);
string::size_type end = s.rfind( '/' );
b.appendRegex( name , s.substr( 0 , end ) , s.substr( end + 1 ) );
}
void append( BSONObjBuilder& b , string name , jsval val , BSONType oldType = EOO , const TraverseStack& stack=TraverseStack() ) {
//cout << "name: " << name << "\t" << typeString( val ) << " oldType: " << oldType << endl;
switch ( JS_TypeOfValue( _context , val ) ) {
case JSTYPE_VOID: b.appendUndefined( name ); break;
case JSTYPE_NULL: b.appendNull( name ); break;
case JSTYPE_NUMBER: {
double d = toNumber( val );
if ( oldType == NumberInt && ((int)d) == d )
b.append( name , (int)d );
else
b.append( name , d );
break;
}
case JSTYPE_STRING: b.append( name , toString( val ) ); break;
case JSTYPE_BOOLEAN: b.appendBool( name , toBoolean( val ) ); break;
case JSTYPE_OBJECT: {
JSObject * o = JSVAL_TO_OBJECT( val );
if ( ! o || o == JSVAL_NULL ) {
b.appendNull( name );
}
else if ( ! appendSpecialDBObject( this , b , name , val , o ) ) {
BSONObj sub = toObject( o , stack );
if ( JS_IsArrayObject( _context , o ) ) {
b.appendArray( name , sub );
}
else {
b.append( name , sub );
}
}
break;
}
case JSTYPE_FUNCTION: {
string s = toString(val);
if ( s[0] == '/' ) {
appendRegex( b , name , s );
}
else {
b.appendCode( name , getFunctionCode( val ) );
}
break;
}
default: uassert( 10217 , (string)"can't append field. name:" + name + " type: " + typeString( val ) , 0 );
}
}
// ---------- to spider monkey ---------
bool hasFunctionIdentifier( const string& code ) {
if ( code.size() < 9 || code.find( "function" ) != 0 )
return false;
return code[8] == ' ' || code[8] == '(';
}
bool isSimpleStatement( const string& code ) {
if ( hasJSReturn( code ) )
return false;
if ( code.find( ';' ) != string::npos &&
code.find( ';' ) != code.rfind( ';' ) )
return false;
if ( code.find( '\n') != string::npos )
return false;
if ( code.find( "for(" ) != string::npos ||
code.find( "for (" ) != string::npos ||
code.find( "while (" ) != string::npos ||
code.find( "while(" ) != string::npos )
return false;
return true;
}
void addRoot( JSFunction * f , const char * name );
JSFunction * compileFunction( const char * code, JSObject * assoc = 0 ) {
const char * gcName = "unknown";
JSFunction * f = _compileFunction( code , assoc , gcName );
//addRoot( f , gcName );
return f;
}
JSFunction * _compileFunction( const char * raw , JSObject * assoc , const char *& gcName ) {
if ( ! assoc )
assoc = JS_GetGlobalObject( _context );
raw = jsSkipWhiteSpace( raw );
//cout << "RAW\n---\n" << raw << "\n---" << endl;
stringstream fname;
fname << "cf_";
static int fnum = 1;
fname << "_" << fnum++ << "_";
if ( ! hasFunctionIdentifier( raw ) ) {
string s = raw;
if ( isSimpleStatement( s ) ) {
s = "return " + s;
}
gcName = "cf anon";
fname << "anon";
return JS_CompileFunction( _context , assoc , fname.str().c_str() , 0 , 0 , s.c_str() , s.size() , "nofile_a" , 0 );
}
string code = raw;
size_t start = code.find( '(' );
assert( start != string::npos );
fname << "_f_" << trim( code.substr( 9 , start - 9 ) );
code = code.substr( start + 1 );
size_t end = code.find( ')' );
assert( end != string::npos );
string paramString = trim( code.substr( 0 , end ) );
code = code.substr( end + 1 );
vector<string> params;
while ( paramString.size() ) {
size_t c = paramString.find( ',' );
if ( c == string::npos ) {
params.push_back( paramString );
break;
}
params.push_back( trim( paramString.substr( 0 , c ) ) );
paramString = trim( paramString.substr( c + 1 ) );
paramString = trim( paramString );
}
boost::scoped_array<const char *> paramArray (new const char*[params.size()]);
for ( size_t i=0; i<params.size(); i++ )
paramArray[i] = params[i].c_str();
JSFunction * func = JS_CompileFunction( _context , assoc , fname.str().c_str() , params.size() , paramArray.get() , code.c_str() , code.size() , "nofile_b" , 0 );
if ( ! func ) {
log() << "compile failed for: " << raw << endl;
return 0;
}
gcName = "cf normal";
return func;
}
jsval toval( double d ) {
jsval val;
assert( JS_NewNumberValue( _context, d , &val ) );
return val;
}
jsval toval( const char * c ) {
JSString * s = JS_NewStringCopyZ( _context , c );
if ( s )
return STRING_TO_JSVAL( s );
// possibly unicode, try manual
size_t len = strlen( c );
size_t dstlen = len * 4;
jschar * dst = (jschar*)malloc( dstlen );
JSBool res = JS_DecodeBytes( _context , c , len , dst, &dstlen );
if ( res ) {
s = JS_NewUCStringCopyN( _context , dst , dstlen );
}
free( dst );
if ( ! res ) {
tlog() << "decode failed. probably invalid utf-8 string [" << c << "]" << endl;
jsval v;
if ( JS_GetPendingException( _context , &v ) )
tlog() << "\t why: " << toString( v ) << endl;
throw InvalidUTF8Exception();
}
CHECKJSALLOC( s );
return STRING_TO_JSVAL( s );
}
JSObject * toJSObject( const BSONObj * obj , bool readOnly=false ) {
static string ref = "$ref";
if ( ref == obj->firstElement().fieldName() ) {
JSObject * o = JS_NewObject( _context , &dbref_class , NULL, NULL);
CHECKNEWOBJECT(o,_context,"toJSObject1");
assert( JS_SetPrivate( _context , o , (void*)(new BSONHolder( obj->getOwned() ) ) ) );
return o;
}
JSObject * o = JS_NewObject( _context , readOnly ? &bson_ro_class : &bson_class , NULL, NULL);
CHECKNEWOBJECT(o,_context,"toJSObject2");
assert( JS_SetPrivate( _context , o , (void*)(new BSONHolder( obj->getOwned() ) ) ) );
return o;
}
jsval toval( const BSONObj* obj , bool readOnly=false ) {
JSObject * o = toJSObject( obj , readOnly );
return OBJECT_TO_JSVAL( o );
}
void makeLongObj( long long n, JSObject * o ) {
boost::uint64_t val = (boost::uint64_t)n;
CHECKNEWOBJECT(o,_context,"NumberLong1");
setProperty( o , "floatApprox" , toval( (double)(boost::int64_t)( val ) ) );
if ( (boost::int64_t)val != (boost::int64_t)(double)(boost::int64_t)( val ) ) {
// using 2 doubles here instead of a single double because certain double
// bit patterns represent undefined values and sm might trash them
setProperty( o , "top" , toval( (double)(boost::uint32_t)( val >> 32 ) ) );
setProperty( o , "bottom" , toval( (double)(boost::uint32_t)( val & 0x00000000ffffffff ) ) );
}
}
jsval toval( long long n ) {
JSObject * o = JS_NewObject( _context , &numberlong_class , 0 , 0 );
makeLongObj( n, o );
return OBJECT_TO_JSVAL( o );
}
jsval toval( const BSONElement& e ) {
switch( e.type() ) {
case EOO:
case jstNULL:
case Undefined:
return JSVAL_NULL;
case NumberDouble:
case NumberInt:
return toval( e.number() );
case Symbol: // TODO: should we make a special class for this
case String:
return toval( e.valuestr() );
case Bool:
return e.boolean() ? JSVAL_TRUE : JSVAL_FALSE;
case Object: {
BSONObj embed = e.embeddedObject().getOwned();
return toval( &embed );
}
case Array: {
BSONObj embed = e.embeddedObject().getOwned();
if ( embed.isEmpty() ) {
return OBJECT_TO_JSVAL( JS_NewArrayObject( _context , 0 , 0 ) );
}
JSObject * array = JS_NewArrayObject( _context , 1 , 0 );
CHECKJSALLOC( array );
jsval myarray = OBJECT_TO_JSVAL( array );
BSONObjIterator i( embed );
while ( i.more() ){
const BSONElement& e = i.next();
jsval v = toval( e );
assert( JS_SetElement( _context , array , atoi(e.fieldName()) , &v ) );
}
return myarray;
}
case jstOID: {
OID oid = e.__oid();
JSObject * o = JS_NewObject( _context , &object_id_class , 0 , 0 );
CHECKNEWOBJECT(o,_context,"jstOID");
setProperty( o , "str" , toval( oid.str().c_str() ) );
return OBJECT_TO_JSVAL( o );
}
case RegEx: {
const char * flags = e.regexFlags();
uintN flagNumber = 0;
while ( *flags ) {
switch ( *flags ) {
case 'g': flagNumber |= JSREG_GLOB; break;
case 'i': flagNumber |= JSREG_FOLD; break;
case 'm': flagNumber |= JSREG_MULTILINE; break;
//case 'y': flagNumber |= JSREG_STICKY; break;
default:
log() << "warning: unknown regex flag:" << *flags << endl;
}
flags++;
}
JSObject * r = JS_NewRegExpObject( _context , (char*)e.regex() , strlen( e.regex() ) , flagNumber );
assert( r );
return OBJECT_TO_JSVAL( r );
}
case Code: {
JSFunction * func = compileFunction( e.valuestr() );
if ( func )
return OBJECT_TO_JSVAL( JS_GetFunctionObject( func ) );
return JSVAL_NULL;
}
case CodeWScope: {
JSFunction * func = compileFunction( e.codeWScopeCode() );
BSONObj extraScope = e.codeWScopeObject();
if ( ! extraScope.isEmpty() ) {
log() << "warning: CodeWScope doesn't transfer to db.eval" << endl;
}
return OBJECT_TO_JSVAL( JS_GetFunctionObject( func ) );
}
case Date:
return OBJECT_TO_JSVAL( js_NewDateObjectMsec( _context , (jsdouble) e.date().millis ) );
case MinKey:
return OBJECT_TO_JSVAL( JS_NewObject( _context , &minkey_class , 0 , 0 ) );
case MaxKey:
return OBJECT_TO_JSVAL( JS_NewObject( _context , &maxkey_class , 0 , 0 ) );
case Timestamp: {
JSObject * o = JS_NewObject( _context , ×tamp_class , 0 , 0 );
CHECKNEWOBJECT(o,_context,"Timestamp1");
setProperty( o , "t" , toval( (double)(e.timestampTime()) ) );
setProperty( o , "i" , toval( (double)(e.timestampInc()) ) );
return OBJECT_TO_JSVAL( o );
}
case NumberLong: {
return toval( e.numberLong() );
}
case DBRef: {
JSObject * o = JS_NewObject( _context , &dbpointer_class , 0 , 0 );
CHECKNEWOBJECT(o,_context,"DBRef1");
setProperty( o , "ns" , toval( e.dbrefNS() ) );
JSObject * oid = JS_NewObject( _context , &object_id_class , 0 , 0 );
CHECKNEWOBJECT(oid,_context,"DBRef2");
setProperty( oid , "str" , toval( e.dbrefOID().str().c_str() ) );
setProperty( o , "id" , OBJECT_TO_JSVAL( oid ) );
return OBJECT_TO_JSVAL( o );
}
case BinData: {
JSObject * o = JS_NewObject( _context , &bindata_class , 0 , 0 );
CHECKNEWOBJECT(o,_context,"Bindata_BinData1");
int len;
const char * data = e.binData( len );
assert( data );
assert( JS_SetPrivate( _context , o , new BinDataHolder( data , len ) ) );
setProperty( o , "len" , toval( (double)len ) );
setProperty( o , "type" , toval( (double)e.binDataType() ) );
return OBJECT_TO_JSVAL( o );
}
}
log() << "toval: unknown type: " << (int) e.type() << endl;
uassert( 10218 , "not done: toval" , 0 );
return 0;
}
// ------- object helpers ------
JSObject * getJSObject( JSObject * o , const char * name ) {
jsval v;
assert( JS_GetProperty( _context , o , name , &v ) );
return JSVAL_TO_OBJECT( v );
}
JSObject * getGlobalObject( const char * name ) {
return getJSObject( JS_GetGlobalObject( _context ) , name );
}
JSObject * getGlobalPrototype( const char * name ) {
return getJSObject( getGlobalObject( name ) , "prototype" );
}
bool hasProperty( JSObject * o , const char * name ) {
JSBool res;
assert( JS_HasProperty( _context , o , name , & res ) );
return res;
}
jsval getProperty( JSObject * o , const char * field ) {
uassert( 10219 , "object passed to getPropery is null" , o );
jsval v;
assert( JS_GetProperty( _context , o , field , &v ) );
return v;
}
void setProperty( JSObject * o , const char * field , jsval v ) {
assert( JS_SetProperty( _context , o , field , &v ) );
}
string typeString( jsval v ) {
JSType t = JS_TypeOfValue( _context , v );
return JS_GetTypeName( _context , t );
}
bool getBoolean( JSObject * o , const char * field ) {
return toBoolean( getProperty( o , field ) );
}
double getNumber( JSObject * o , const char * field ) {
return toNumber( getProperty( o , field ) );
}
string getString( JSObject * o , const char * field ) {
return toString( getProperty( o , field ) );
}
JSClass * getClass( JSObject * o , const char * field ) {
jsval v;
assert( JS_GetProperty( _context , o , field , &v ) );
if ( ! JSVAL_IS_OBJECT( v ) )
return 0;
return JS_GET_CLASS( _context , JSVAL_TO_OBJECT( v ) );
}
JSContext * _context;
};
void bson_finalize( JSContext * cx , JSObject * obj ) {
BSONHolder * o = GETHOLDER( cx , obj );
if ( o ) {
delete o;
assert( JS_SetPrivate( cx , obj , 0 ) );
}
}
JSBool bson_enumerate( JSContext *cx, JSObject *obj, JSIterateOp enum_op, jsval *statep, jsid *idp ) {
BSONHolder * o = GETHOLDER( cx , obj );
if ( enum_op == JSENUMERATE_INIT ) {
if ( o ) {
BSONFieldIterator * it = o->it();
*statep = PRIVATE_TO_JSVAL( it );
}
else {
*statep = 0;
}
if ( idp )
*idp = JSVAL_ZERO;
return JS_TRUE;
}
BSONFieldIterator * it = (BSONFieldIterator*)JSVAL_TO_PRIVATE( *statep );
if ( ! it ) {
*statep = 0;
return JS_TRUE;
}
if ( enum_op == JSENUMERATE_NEXT ) {
if ( it->more() ) {
string name = it->next();
Convertor c(cx);
assert( JS_ValueToId( cx , c.toval( name.c_str() ) , idp ) );
}
else {
delete it;
*statep = 0;
}
return JS_TRUE;
}
if ( enum_op == JSENUMERATE_DESTROY ) {
if ( it )
delete it;
return JS_TRUE;
}
uassert( 10220 , "don't know what to do with this op" , 0 );
return JS_FALSE;
}
JSBool noaccess( JSContext *cx, JSObject *obj, jsval idval, jsval *vp) {
BSONHolder * holder = GETHOLDER( cx , obj );
if ( ! holder ) {
// in init code still
return JS_TRUE;
}
if ( holder->_inResolve )
return JS_TRUE;
JS_ReportError( cx , "doing write op on read only operation" );
return JS_FALSE;
}
JSClass bson_ro_class = {
"bson_ro_object" , JSCLASS_HAS_PRIVATE | JSCLASS_NEW_RESOLVE | JSCLASS_NEW_ENUMERATE ,
noaccess, noaccess, JS_PropertyStub, noaccess,
(JSEnumerateOp)bson_enumerate, (JSResolveOp)(&resolveBSONField) , JS_ConvertStub, bson_finalize ,
JSCLASS_NO_OPTIONAL_MEMBERS
};
JSBool bson_cons( JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval ) {
cerr << "bson_cons : shouldn't be here!" << endl;
JS_ReportError( cx , "can't construct bson object" );
return JS_FALSE;
}
JSFunctionSpec bson_functions[] = {
{ 0 }
};
JSBool bson_add_prop( JSContext *cx, JSObject *obj, jsval idval, jsval *vp) {
BSONHolder * holder = GETHOLDER( cx , obj );
if ( ! holder ) {
// static init
return JS_TRUE;
}
if ( ! holder->_inResolve ) {
Convertor c(cx);
string name = c.toString( idval );
if ( holder->_obj[name].eoo() ) {
holder->_extra.push_back( name );
}
holder->_modified = true;
}
return JS_TRUE;
}
JSBool mark_modified( JSContext *cx, JSObject *obj, jsval idval, jsval *vp) {
Convertor c(cx);
BSONHolder * holder = GETHOLDER( cx , obj );
if ( !holder ) // needed when we're messing with DBRef.prototype
return JS_TRUE;
if ( holder->_inResolve )
return JS_TRUE;
holder->_modified = true;
holder->_removed.erase( c.toString( idval ) );
return JS_TRUE;
}
JSBool mark_modified_remove( JSContext *cx, JSObject *obj, jsval idval, jsval *vp) {
Convertor c(cx);
BSONHolder * holder = GETHOLDER( cx , obj );
if ( holder->_inResolve )
return JS_TRUE;
holder->_modified = true;
holder->_removed.insert( c.toString( idval ) );
return JS_TRUE;
}
JSClass bson_class = {
"bson_object" , JSCLASS_HAS_PRIVATE | JSCLASS_NEW_RESOLVE | JSCLASS_NEW_ENUMERATE ,
bson_add_prop, mark_modified_remove, JS_PropertyStub, mark_modified,
(JSEnumerateOp)bson_enumerate, (JSResolveOp)(&resolveBSONField) , JS_ConvertStub, bson_finalize ,
JSCLASS_NO_OPTIONAL_MEMBERS
};
static JSClass global_class = {
"global", JSCLASS_GLOBAL_FLAGS,
JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
JSCLASS_NO_OPTIONAL_MEMBERS
};
// --- global helpers ---
JSBool native_print( JSContext * cx , JSObject * obj , uintN argc, jsval *argv, jsval *rval ) {
stringstream ss;
Convertor c( cx );
for ( uintN i=0; i<argc; i++ ) {
if ( i > 0 )
ss << " ";
ss << c.toString( argv[i] );
}
ss << "\n";
Logstream::logLockless( ss.str() );
return JS_TRUE;
}
JSBool native_helper( JSContext *cx , JSObject *obj , uintN argc, jsval *argv , jsval *rval ) {
Convertor c(cx);
NativeFunction func = (NativeFunction)((long long)c.getNumber( obj , "x" ) );
assert( func );
BSONObj a;
if ( argc > 0 ) {
BSONObjBuilder args;
for ( uintN i=0; i<argc; i++ ) {
c.append( args , args.numStr( i ) , argv[i] );
}
a = args.obj();
}
BSONObj out;
try {
out = func( a );
}
catch ( std::exception& e ) {
JS_ReportError( cx , e.what() );
return JS_FALSE;
}
if ( out.isEmpty() ) {
*rval = JSVAL_VOID;
}
else {
*rval = c.toval( out.firstElement() );
}
return JS_TRUE;
}
JSBool native_load( JSContext *cx , JSObject *obj , uintN argc, jsval *argv , jsval *rval );
JSBool native_gc( JSContext *cx , JSObject *obj , uintN argc, jsval *argv , jsval *rval ) {
JS_GC( cx );
return JS_TRUE;
}
JSFunctionSpec globalHelpers[] = {
{ "print" , &native_print , 0 , 0 , 0 } ,
{ "nativeHelper" , &native_helper , 1 , 0 , 0 } ,
{ "load" , &native_load , 1 , 0 , 0 } ,
{ "gc" , &native_gc , 1 , 0 , 0 } ,
{ 0 , 0 , 0 , 0 , 0 }
};
// ----END global helpers ----
// Object helpers
JSBool bson_get_size(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) {
if ( argc != 1 || !JSVAL_IS_OBJECT( argv[ 0 ] ) ) {
JS_ReportError( cx , "bsonsize requires one valid object" );
return JS_FALSE;
}
Convertor c(cx);
if ( argv[0] == JSVAL_VOID || argv[0] == JSVAL_NULL ) {
*rval = c.toval( 0.0 );
return JS_TRUE;
}
JSObject * o = JSVAL_TO_OBJECT( argv[0] );
double size = 0;
if ( JS_InstanceOf( cx , o , &bson_ro_class , 0 ) ||
JS_InstanceOf( cx , o , &bson_class , 0 ) ) {
BSONHolder * h = GETHOLDER( cx , o );
if ( h ) {
size = h->_obj.objsize();
}
}
else {
BSONObj temp = c.toObject( o );
size = temp.objsize();
}