2007-03-22 10:30:00 -07:00
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** 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
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* 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,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* 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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#ifndef jsatom_h___
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#define jsatom_h___
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/*
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* JS atom table.
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*/
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#include <stddef.h>
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2008-09-05 10:19:17 -07:00
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#include "jsversion.h"
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2007-03-22 10:30:00 -07:00
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#include "jstypes.h"
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#include "jshash.h" /* Added by JSIFY */
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2007-08-11 13:25:16 -07:00
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#include "jsdhash.h"
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2007-03-22 10:30:00 -07:00
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#include "jsapi.h"
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#include "jsprvtd.h"
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#include "jspubtd.h"
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#include "jslock.h"
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JS_BEGIN_EXTERN_C
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2007-08-11 13:25:16 -07:00
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#define ATOM_PINNED 0x1 /* atom is pinned against GC */
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#define ATOM_INTERNED 0x2 /* pinned variant for JS_Intern* API */
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#define ATOM_NOCOPY 0x4 /* don't copy atom string bytes */
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#define ATOM_TMPSTR 0x8 /* internal, to avoid extra string */
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2007-03-22 10:30:00 -07:00
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2007-08-11 13:25:16 -07:00
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#define ATOM_KEY(atom) ((jsval)(atom))
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2007-03-22 10:30:00 -07:00
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#define ATOM_IS_DOUBLE(atom) JSVAL_IS_DOUBLE(ATOM_KEY(atom))
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#define ATOM_TO_DOUBLE(atom) JSVAL_TO_DOUBLE(ATOM_KEY(atom))
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#define ATOM_IS_STRING(atom) JSVAL_IS_STRING(ATOM_KEY(atom))
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#define ATOM_TO_STRING(atom) JSVAL_TO_STRING(ATOM_KEY(atom))
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2007-07-11 02:25:45 -07:00
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#if JS_BYTES_PER_WORD == 4
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# define ATOM_HASH(atom) ((JSHashNumber)(atom) >> 2)
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#elif JS_BYTES_PER_WORD == 8
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2007-11-16 20:20:37 -08:00
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# define ATOM_HASH(atom) (((JSHashNumber)(jsuword)(atom) >> 3) ^ \
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2007-07-11 02:25:45 -07:00
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(JSHashNumber)((jsuword)(atom) >> 32))
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#else
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# error "Unsupported configuration"
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#endif
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2007-03-22 10:30:00 -07:00
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/*
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* Return a printable, lossless char[] representation of a string-type atom.
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* The lifetime of the result extends at least until the next GC activation,
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* longer if cx's string newborn root is not overwritten.
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*/
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extern const char *
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js_AtomToPrintableString(JSContext *cx, JSAtom *atom);
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struct JSAtomListElement {
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JSHashEntry entry;
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};
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#define ALE_ATOM(ale) ((JSAtom *) (ale)->entry.key)
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#define ALE_INDEX(ale) ((jsatomid) JS_PTR_TO_UINT32((ale)->entry.value))
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#define ALE_VALUE(ale) ((jsval) (ale)->entry.value)
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#define ALE_NEXT(ale) ((JSAtomListElement *) (ale)->entry.next)
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2009-05-21 11:00:53 -07:00
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/*
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* In an upvars list, ALE_DEFN(ale)->resolve() is the outermost definition the
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* name may reference. If a with block or a function that calls eval encloses
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* the use, the name may end up referring to something else at runtime.
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*/
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#define ALE_DEFN(ale) ((JSDefinition *) (ale)->entry.value)
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#define ALE_SET_ATOM(ale,atom) ((ale)->entry.key = (const void *)(atom))
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#define ALE_SET_INDEX(ale,index)((ale)->entry.value = JS_UINT32_TO_PTR(index))
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#define ALE_SET_DEFN(ale, dn) ((ale)->entry.value = (void *)(dn))
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#define ALE_SET_VALUE(ale, v) ((ale)->entry.value = (void *)(v))
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#define ALE_SET_NEXT(ale,nxt) ((ale)->entry.next = (JSHashEntry *)(nxt))
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2007-03-22 10:30:00 -07:00
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2009-04-05 21:17:22 -07:00
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/*
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* NB: JSAtomSet must be plain-old-data as it is embedded in the pn_u union in
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* JSParseNode. JSAtomList encapsulates all operational uses of a JSAtomSet.
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*
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* The JSAtomList name is traditional, even though the implementation is a map
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* (not to be confused with JSAtomMap). In particular the "ALE" and "ale" short
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* names for JSAtomListElement variables roll off the fingers, compared to ASE
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* or AME alternatives.
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*/
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struct JSAtomSet {
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JSHashEntry *list; /* literals indexed for mapping */
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JSHashTable *table; /* hash table if list gets too long */
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jsuint count; /* count of indexed literals */
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};
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2009-04-05 21:17:22 -07:00
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#ifdef __cplusplus
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struct JSAtomList : public JSAtomSet
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{
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#ifdef DEBUG
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const JSAtomSet* set; /* asserted null in mutating methods */
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#endif
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JSAtomList() {
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list = NULL; table = NULL; count = 0;
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#ifdef DEBUG
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set = NULL;
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#endif
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}
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JSAtomList(const JSAtomSet& as) {
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list = as.list; table = as.table; count = as.count;
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#ifdef DEBUG
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set = &as;
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#endif
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}
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void clear() { JS_ASSERT(!set); list = NULL; table = NULL; count = 0; }
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JSAtomListElement *lookup(JSAtom *atom) {
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JSHashEntry **hep;
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return rawLookup(atom, hep);
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}
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JSAtomListElement *rawLookup(JSAtom *atom, JSHashEntry **&hep);
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enum AddHow { UNIQUE, SHADOW, HOIST };
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JSAtomListElement *add(JSCompiler *jsc, JSAtom *atom, AddHow how = UNIQUE);
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void remove(JSCompiler *jsc, JSAtom *atom) {
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JSHashEntry **hep;
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JSAtomListElement *ale = rawLookup(atom, hep);
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if (ale)
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rawRemove(jsc, ale, hep);
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}
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void rawRemove(JSCompiler *jsc, JSAtomListElement *ale, JSHashEntry **hep);
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};
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/*
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* Iterate over an atom list. We define a call operator to minimize the syntax
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* tax for users. We do not use a more standard pattern using ++ and * because
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* (a) it's the wrong pattern for a non-scalar; (b) it's overkill -- one method
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* is enough. (This comment is overkill!)
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*/
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class JSAtomListIterator {
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JSAtomList* list;
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JSAtomListElement* next;
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uint32 index;
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public:
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JSAtomListIterator(JSAtomList* al) : list(al) { reset(); }
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void reset() {
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next = (JSAtomListElement *) list->list;
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index = 0;
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}
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JSAtomListElement* operator ()();
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};
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#endif /* __cplusplus */
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2007-03-22 10:30:00 -07:00
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struct JSAtomMap {
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JSAtom **vector; /* array of ptrs to indexed atoms */
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jsatomid length; /* count of (to-be-)indexed atoms */
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};
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struct JSAtomState {
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2007-08-11 13:25:16 -07:00
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JSDHashTable stringAtoms; /* hash table with shared strings */
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JSDHashTable doubleAtoms; /* hash table with shared doubles */
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2007-08-07 00:29:32 -07:00
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#ifdef JS_THREADSAFE
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JSThinLock lock;
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#endif
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/*
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* From this point until the end of struct definition the struct must
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* contain only JSAtom fields. We use this to access the storage occupied
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* by the common atoms in js_FinishCommonAtoms.
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*
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* js_common_atom_names defined in jsatom.c contains C strings for atoms
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* in the order of atom fields here. Therefore you must update that array
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* if you change member order here.
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*/
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2007-03-22 10:30:00 -07:00
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/* The rt->emptyString atom, see jsstr.c's js_InitRuntimeStringState. */
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JSAtom *emptyAtom;
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2008-10-29 00:14:30 -07:00
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/*
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* Literal value and type names.
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* NB: booleanAtoms must come right before typeAtoms!
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*/
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JSAtom *booleanAtoms[2];
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JSAtom *typeAtoms[JSTYPE_LIMIT];
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JSAtom *nullAtom;
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/* Standard class constructor or prototype names. */
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JSAtom *classAtoms[JSProto_LIMIT];
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/* Various built-in or commonly-used atoms, pinned on first context. */
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JSAtom *anonymousAtom;
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JSAtom *applyAtom;
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2007-03-22 10:30:00 -07:00
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JSAtom *argumentsAtom;
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JSAtom *arityAtom;
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2008-10-30 16:01:53 -07:00
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JSAtom *callAtom;
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JSAtom *calleeAtom;
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JSAtom *callerAtom;
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JSAtom *classPrototypeAtom;
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JSAtom *constructorAtom;
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JSAtom *countAtom;
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JSAtom *eachAtom;
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JSAtom *evalAtom;
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JSAtom *fileNameAtom;
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JSAtom *getAtom;
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JSAtom *getterAtom;
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JSAtom *indexAtom;
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JSAtom *inputAtom;
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JSAtom *iteratorAtom;
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JSAtom *lengthAtom;
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JSAtom *lineNumberAtom;
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JSAtom *messageAtom;
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JSAtom *nameAtom;
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JSAtom *nextAtom;
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JSAtom *noSuchMethodAtom;
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JSAtom *parentAtom;
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JSAtom *protoAtom;
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JSAtom *setAtom;
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JSAtom *setterAtom;
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JSAtom *stackAtom;
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JSAtom *toLocaleStringAtom;
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JSAtom *toSourceAtom;
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JSAtom *toStringAtom;
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JSAtom *valueOfAtom;
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2008-09-30 23:13:58 -07:00
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JSAtom *toJSONAtom;
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2007-06-12 12:33:40 -07:00
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JSAtom *void0Atom;
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2009-07-21 19:35:59 -07:00
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JSAtom *enumerableAtom;
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JSAtom *configurableAtom;
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JSAtom *writableAtom;
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JSAtom *valueAtom;
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2007-08-07 00:29:32 -07:00
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#if JS_HAS_XML_SUPPORT
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JSAtom *etagoAtom;
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JSAtom *namespaceAtom;
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JSAtom *ptagcAtom;
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JSAtom *qualifierAtom;
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JSAtom *spaceAtom;
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JSAtom *stagoAtom;
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JSAtom *starAtom;
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JSAtom *starQualifierAtom;
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JSAtom *tagcAtom;
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JSAtom *xmlAtom;
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2007-08-07 00:29:32 -07:00
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#endif
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#ifdef NARCISSUS
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JSAtom *__call__Atom;
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JSAtom *__construct__Atom;
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JSAtom *__hasInstance__Atom;
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2007-08-07 00:29:32 -07:00
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JSAtom *ExecutionContextAtom;
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JSAtom *currentAtom;
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#endif
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2007-03-22 10:30:00 -07:00
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/* Less frequently used atoms, pinned lazily by JS_ResolveStandardClass. */
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struct {
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JSAtom *InfinityAtom;
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JSAtom *NaNAtom;
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JSAtom *XMLListAtom;
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JSAtom *decodeURIAtom;
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JSAtom *decodeURIComponentAtom;
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JSAtom *defineGetterAtom;
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JSAtom *defineSetterAtom;
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JSAtom *encodeURIAtom;
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JSAtom *encodeURIComponentAtom;
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JSAtom *escapeAtom;
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JSAtom *functionNamespaceURIAtom;
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JSAtom *hasOwnPropertyAtom;
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JSAtom *isFiniteAtom;
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JSAtom *isNaNAtom;
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JSAtom *isPrototypeOfAtom;
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JSAtom *isXMLNameAtom;
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JSAtom *lookupGetterAtom;
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JSAtom *lookupSetterAtom;
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JSAtom *parseFloatAtom;
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JSAtom *parseIntAtom;
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JSAtom *propertyIsEnumerableAtom;
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JSAtom *unescapeAtom;
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JSAtom *unevalAtom;
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JSAtom *unwatchAtom;
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JSAtom *watchAtom;
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} lazy;
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};
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2007-08-07 00:29:32 -07:00
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#define ATOM_OFFSET_START offsetof(JSAtomState, emptyAtom)
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#define LAZY_ATOM_OFFSET_START offsetof(JSAtomState, lazy)
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#define ATOM_OFFSET_LIMIT (sizeof(JSAtomState))
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2007-08-11 13:25:16 -07:00
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#define COMMON_ATOMS_START(state) \
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2008-11-13 00:30:20 -08:00
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((JSAtom **)((uint8 *)(state) + ATOM_OFFSET_START))
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#define COMMON_ATOM_INDEX(name) \
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((offsetof(JSAtomState, name##Atom) - ATOM_OFFSET_START) \
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/ sizeof(JSAtom*))
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#define COMMON_TYPE_ATOM_INDEX(type) \
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((offsetof(JSAtomState, typeAtoms[type]) - ATOM_OFFSET_START) \
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/ sizeof(JSAtom*))
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2007-08-11 13:25:16 -07:00
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2007-06-26 11:19:54 -07:00
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#define ATOM_OFFSET(name) offsetof(JSAtomState, name##Atom)
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#define OFFSET_TO_ATOM(rt,off) (*(JSAtom **)((char*)&(rt)->atomState + (off)))
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#define CLASS_ATOM_OFFSET(name) offsetof(JSAtomState,classAtoms[JSProto_##name])
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2007-03-22 10:30:00 -07:00
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#define CLASS_ATOM(cx,name) \
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((cx)->runtime->atomState.classAtoms[JSProto_##name])
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2007-08-07 00:29:32 -07:00
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extern const char *const js_common_atom_names[];
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2008-11-13 00:30:20 -08:00
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extern const size_t js_common_atom_count;
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2007-08-07 00:29:32 -07:00
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/*
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2009-03-05 03:12:50 -08:00
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* Macros to access C strings for JSType and boolean literals.
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2007-08-07 00:29:32 -07:00
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*/
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2008-10-29 00:14:30 -07:00
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#define JS_BOOLEAN_STR(type) (js_common_atom_names[1 + (type)])
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#define JS_TYPE_STR(type) (js_common_atom_names[1 + 2 + (type)])
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2007-08-07 00:29:32 -07:00
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/* Well-known predefined C strings. */
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2007-03-22 10:30:00 -07:00
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#define JS_PROTO(name,code,init) extern const char js_##name##_str[];
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#include "jsproto.tbl"
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#undef JS_PROTO
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extern const char js_anonymous_str[];
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2008-10-29 13:30:41 -07:00
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extern const char js_apply_str[];
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2007-03-22 10:30:00 -07:00
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extern const char js_arguments_str[];
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extern const char js_arity_str[];
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2008-10-30 16:01:53 -07:00
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extern const char js_call_str[];
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2007-03-22 10:30:00 -07:00
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extern const char js_callee_str[];
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extern const char js_caller_str[];
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extern const char js_class_prototype_str[];
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extern const char js_close_str[];
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extern const char js_constructor_str[];
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extern const char js_count_str[];
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extern const char js_etago_str[];
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extern const char js_each_str[];
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extern const char js_eval_str[];
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extern const char js_fileName_str[];
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extern const char js_get_str[];
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extern const char js_getter_str[];
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extern const char js_index_str[];
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extern const char js_input_str[];
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extern const char js_iterator_str[];
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extern const char js_length_str[];
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extern const char js_lineNumber_str[];
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extern const char js_message_str[];
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extern const char js_name_str[];
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extern const char js_namespace_str[];
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extern const char js_next_str[];
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extern const char js_noSuchMethod_str[];
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extern const char js_object_str[];
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extern const char js_parent_str[];
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extern const char js_proto_str[];
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extern const char js_ptagc_str[];
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extern const char js_qualifier_str[];
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extern const char js_send_str[];
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extern const char js_setter_str[];
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extern const char js_set_str[];
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extern const char js_space_str[];
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extern const char js_stack_str[];
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extern const char js_stago_str[];
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extern const char js_star_str[];
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extern const char js_starQualifier_str[];
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extern const char js_tagc_str[];
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extern const char js_toSource_str[];
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extern const char js_toString_str[];
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extern const char js_toLocaleString_str[];
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2007-08-07 00:29:32 -07:00
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extern const char js_undefined_str[];
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2007-03-22 10:30:00 -07:00
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extern const char js_valueOf_str[];
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2008-09-30 23:13:58 -07:00
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extern const char js_toJSON_str[];
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2007-03-22 10:30:00 -07:00
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extern const char js_xml_str[];
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2009-07-21 19:35:59 -07:00
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extern const char js_enumerable_str[];
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extern const char js_configurable_str[];
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extern const char js_writable_str[];
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extern const char js_value_str[];
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2007-03-22 10:30:00 -07:00
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#ifdef NARCISSUS
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2008-10-30 15:38:10 -07:00
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extern const char js___call___str[];
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extern const char js___construct___str[];
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extern const char js___hasInstance___str[];
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2007-03-22 10:30:00 -07:00
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extern const char js_ExecutionContext_str[];
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extern const char js_current_str[];
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#endif
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/*
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2007-08-07 00:29:32 -07:00
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* Initialize atom state. Return true on success, false on failure to allocate
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* memory. The caller must zero rt->atomState before calling this function and
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* only call it after js_InitGC successfully returns.
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2007-03-22 10:30:00 -07:00
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*/
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extern JSBool
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2007-08-07 00:29:32 -07:00
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js_InitAtomState(JSRuntime *rt);
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2007-03-22 10:30:00 -07:00
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/*
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2007-08-07 00:29:32 -07:00
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* Free and clear atom state including any interned string atoms. This
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* function must be called before js_FinishGC.
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2007-03-22 10:30:00 -07:00
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*/
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extern void
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2007-08-07 00:29:32 -07:00
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js_FinishAtomState(JSRuntime *rt);
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2007-03-22 10:30:00 -07:00
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/*
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2007-04-16 23:53:37 -07:00
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* Atom tracing and garbage collection hooks.
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2007-03-22 10:30:00 -07:00
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*/
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extern void
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2007-08-11 13:25:16 -07:00
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js_TraceAtomState(JSTracer *trc, JSBool allAtoms);
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2007-03-22 10:30:00 -07:00
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extern void
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2007-08-07 00:29:32 -07:00
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js_SweepAtomState(JSContext *cx);
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2007-03-22 10:30:00 -07:00
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extern JSBool
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2007-08-07 00:29:32 -07:00
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js_InitCommonAtoms(JSContext *cx);
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2007-03-22 10:30:00 -07:00
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extern void
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2007-08-07 00:29:32 -07:00
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js_FinishCommonAtoms(JSContext *cx);
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2007-03-22 10:30:00 -07:00
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/*
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2007-07-11 02:25:45 -07:00
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* Find or create the atom for a double value. Return null on failure to
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* allocate memory.
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2007-03-22 10:30:00 -07:00
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*/
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extern JSAtom *
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2007-07-11 02:25:45 -07:00
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js_AtomizeDouble(JSContext *cx, jsdouble d);
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2007-03-22 10:30:00 -07:00
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/*
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2007-07-11 02:25:45 -07:00
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* Find or create the atom for a string. Return null on failure to allocate
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* memory.
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2007-03-22 10:30:00 -07:00
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*/
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extern JSAtom *
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js_AtomizeString(JSContext *cx, JSString *str, uintN flags);
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2008-01-19 13:15:08 -08:00
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extern JSAtom *
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2007-03-22 10:30:00 -07:00
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js_Atomize(JSContext *cx, const char *bytes, size_t length, uintN flags);
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2008-01-19 13:15:08 -08:00
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extern JSAtom *
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2007-03-22 10:30:00 -07:00
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js_AtomizeChars(JSContext *cx, const jschar *chars, size_t length, uintN flags);
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/*
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* Return an existing atom for the given char array or null if the char
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* sequence is currently not atomized.
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*/
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extern JSAtom *
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js_GetExistingStringAtom(JSContext *cx, const jschar *chars, size_t length);
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/*
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2007-07-08 02:03:34 -07:00
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* This variant handles all primitive values.
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2007-03-22 10:30:00 -07:00
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*/
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2007-08-11 13:25:16 -07:00
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JSBool
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js_AtomizePrimitiveValue(JSContext *cx, jsval v, JSAtom **atomp);
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2007-03-22 10:30:00 -07:00
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2007-08-07 00:29:32 -07:00
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#ifdef DEBUG
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extern JS_FRIEND_API(void)
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js_DumpAtoms(JSContext *cx, FILE *fp);
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#endif
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2007-03-22 10:30:00 -07:00
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/*
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* For all unmapped atoms recorded in al, add a mapping from the atom's index
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2007-07-08 02:03:34 -07:00
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* to its address. map->length must already be set to the number of atoms in
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* the list and map->vector must point to pre-allocated memory.
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2007-03-22 10:30:00 -07:00
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*/
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2008-01-19 13:15:08 -08:00
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extern void
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2007-07-08 02:03:34 -07:00
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js_InitAtomMap(JSContext *cx, JSAtomMap *map, JSAtomList *al);
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2007-03-22 10:30:00 -07:00
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JS_END_EXTERN_C
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#endif /* jsatom_h___ */
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