зеркало из https://github.com/mozilla/gecko-dev.git
140 строки
4.1 KiB
C++
140 строки
4.1 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1 (the
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* "License"); you may not use this file except in compliance with the License. You may obtain
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* a copy of the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
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* WARRANTY OF ANY KIND, either express or implied. See the License for the specific
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* language governing rights and limitations under the License.
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*
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* The Original Code is [Open Source Virtual Machine.]
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*
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* The Initial Developer of the Original Code is Adobe System Incorporated. Portions created
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* by the Initial Developer are Copyright (C)[ 2004-2006 ] Adobe Systems Incorporated. All Rights
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* Reserved.
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*
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* Contributor(s): Adobe AS3 Team
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*
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* Alternatively, the contents of this file may be used under the terms of either the GNU
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* General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public
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* License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the
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* LGPL are applicable instead of those above. If you wish to allow use of your version of this
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* file only under the terms of either the GPL or the LGPL, and not to allow others to use your
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* version of this file under the terms of the MPL, indicate your decision by deleting provisions
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* above and replace them with the notice and other provisions required by the GPL or the
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* LGPL. If you do not delete the provisions above, a recipient may use your version of this file
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* under the terms of any one of the MPL, the GPL or the LGPL.
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*
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***** END LICENSE BLOCK ***** */
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namespace avmplus
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{
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/**
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* type descriptor for a captured scope chain
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*/
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class ScopeTypeChain : public MMgc::GCObject
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{
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ScopeTypeChain(ScopeTypeChain* outer, int capture, int extra)
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{
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if (outer)
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{
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size = outer->size + capture;
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for (int i=0, n=outer->size; i < n; i ++)
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scopes[i] = outer->scopes[i];
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}
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else
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{
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size = capture;
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}
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fullsize = size + extra;
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}
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public:
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int size;
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int fullsize;
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struct Entry {
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Traits* traits;
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bool isWith;
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}
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scopes[1]; // actual length = fullsize;
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static ScopeTypeChain* create(MMgc::GC* gc, ScopeTypeChain* outer, int capture, int extra=0)
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{
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int pad = capture+extra;
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size_t padSize = sizeof(struct Entry) *
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(((pad > 0) ? (pad - 1) : 0) + (outer ? outer->size : 0));
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return new (gc, padSize) ScopeTypeChain(outer, capture, extra);
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}
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};
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/**
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* a captured scope chain
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*/
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class ScopeChain : public MMgc::GCObject
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{
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public:
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ScopeTypeChain* const scopeTraits;
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DRCWB(Namespace*) const defaultXmlNamespace;
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private:
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friend class CodegenMIR;
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Atom scopes[1]; // actual length == size
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public:
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/*
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dxns is modelled as a variable on an activation object. The activation
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object will be in several scope chains, so we can't store dxns in the SC.
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When it changes, it's new valuable is visible in all closures in scope.
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*/
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ScopeChain(ScopeTypeChain* _scopeTraits, ScopeChain* _outer, Namespace * _dxns)
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: scopeTraits(_scopeTraits), defaultXmlNamespace(_dxns)
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{
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if (_outer)
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{
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for (int i=0, n=_outer->scopeTraits->size;/*_outer->getSize();*/ i < n; i ++)
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{
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setScope(i, _outer->scopes[i]);
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}
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}
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}
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Atom getScope(int i) const
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{
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AvmAssert(i >= 0 && i < scopeTraits->size);
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return scopes[i];
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}
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void setScope(int i, Atom value)
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{
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AvmAssert(i >= 0 && i < scopeTraits->size);
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//scopes[i] = value;
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WBATOM(MMgc::GC::GetGC(this), this, &scopes[i], value);
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}
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int getSize() const {
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if ( scopeTraits )
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return scopeTraits->size;
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else
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return 0;
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}
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Namespace** getDefaultNamespaceAddr() const {
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return (Namespace**)&defaultXmlNamespace;
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}
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static ScopeChain* create(MMgc::GC* gc, ScopeTypeChain *scopeTraits, ScopeChain* outer, Namespace *dxns)
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{
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int depth = scopeTraits->size;
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size_t padSize = depth > 0 ? sizeof(Atom) * (depth-1) : 0;
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return new (gc, padSize) ScopeChain(scopeTraits, outer, dxns);
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}
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};
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}
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