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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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|
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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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#include "jsversion.h" |
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#include "jstypes.h" |
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#include "jshash.h" /* Added by JSIFY */ |
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#include "jsdhash.h" |
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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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|
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JS_BEGIN_EXTERN_C |
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|
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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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|
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#define ATOM_KEY(atom) ((jsval)(atom)) |
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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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|
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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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# define ATOM_HASH(atom) (((JSHashNumber)(jsuword)(atom) >> 3) ^ \ |
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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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|
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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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|
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struct JSAtomListElement { |
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JSHashEntry entry; |
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}; |
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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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|
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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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|
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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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|
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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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|
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#ifdef __cplusplus |
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|
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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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|
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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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|
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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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|
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void clear() { JS_ASSERT(!set); list = NULL; table = NULL; count = 0; } |
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|
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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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|
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JSAtomListElement *rawLookup(JSAtom *atom, JSHashEntry **&hep); |
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|
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enum AddHow { UNIQUE, SHADOW, HOIST }; |
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|
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JSAtomListElement *add(JSCompiler *jsc, JSAtom *atom, AddHow how = UNIQUE); |
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|
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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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|
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void rawRemove(JSCompiler *jsc, JSAtomListElement *ale, JSHashEntry **hep); |
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}; |
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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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|
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public: |
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JSAtomListIterator(JSAtomList* al) : list(al) { reset(); } |
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|
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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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|
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JSAtomListElement* operator ()(); |
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}; |
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|
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#endif /* __cplusplus */ |
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|
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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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|
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struct JSAtomState { |
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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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#ifdef JS_THREADSAFE |
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JSThinLock lock; |
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#endif |
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|
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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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|
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/* The rt->emptyString atom, see jsstr.c's js_InitRuntimeStringState. */ |
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JSAtom *emptyAtom; |
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|
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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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|
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/* Standard class constructor or prototype names. */ |
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JSAtom *classAtoms[JSProto_LIMIT]; |
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|
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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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JSAtom *argumentsAtom; |
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JSAtom *arityAtom; |
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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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JSAtom *toJSONAtom; |
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JSAtom *void0Atom; |
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|
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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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#endif |
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|
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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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JSAtom *ExecutionContextAtom; |
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JSAtom *currentAtom; |
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#endif |
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|
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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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|
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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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|
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#define COMMON_ATOMS_START(state) \ |
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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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|
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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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|
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#define CLASS_ATOM(cx,name) \ |
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((cx)->runtime->atomState.classAtoms[JSProto_##name]) |
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|
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extern const char *const js_common_atom_names[]; |
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extern const size_t js_common_atom_count; |
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|
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/* |
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* Macros to access C strings for JSType and boolean literals. |
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*/ |
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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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|
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/* Well-known predefined C strings. */ |
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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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|
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extern const char js_anonymous_str[]; |
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extern const char js_apply_str[]; |
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extern const char js_arguments_str[]; |
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extern const char js_arity_str[]; |
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extern const char js_call_str[]; |
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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[]; |
| 382 |
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[]; |
| 389 |
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[]; |
| 393 |
extern const char js_undefined_str[]; |
| 394 |
extern const char js_valueOf_str[]; |
| 395 |
extern const char js_toJSON_str[]; |
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extern const char js_xml_str[]; |
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|
| 398 |
#ifdef NARCISSUS |
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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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extern const char js_ExecutionContext_str[]; |
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extern const char js_current_str[]; |
| 404 |
#endif |
| 405 |
|
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/* |
| 407 |
* Initialize atom state. Return true on success, false on failure to allocate |
| 408 |
* memory. The caller must zero rt->atomState before calling this function and |
| 409 |
* only call it after js_InitGC successfully returns. |
| 410 |
*/ |
| 411 |
extern JSBool |
| 412 |
js_InitAtomState(JSRuntime *rt); |
| 413 |
|
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/* |
| 415 |
* Free and clear atom state including any interned string atoms. This |
| 416 |
* function must be called before js_FinishGC. |
| 417 |
*/ |
| 418 |
extern void |
| 419 |
js_FinishAtomState(JSRuntime *rt); |
| 420 |
|
| 421 |
/* |
| 422 |
* Atom tracing and garbage collection hooks. |
| 423 |
*/ |
| 424 |
|
| 425 |
extern void |
| 426 |
js_TraceAtomState(JSTracer *trc, JSBool allAtoms); |
| 427 |
|
| 428 |
extern void |
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js_SweepAtomState(JSContext *cx); |
| 430 |
|
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extern JSBool |
| 432 |
js_InitCommonAtoms(JSContext *cx); |
| 433 |
|
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extern void |
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js_FinishCommonAtoms(JSContext *cx); |
| 436 |
|
| 437 |
/* |
| 438 |
* Find or create the atom for a double value. Return null on failure to |
| 439 |
* allocate memory. |
| 440 |
*/ |
| 441 |
extern JSAtom * |
| 442 |
js_AtomizeDouble(JSContext *cx, jsdouble d); |
| 443 |
|
| 444 |
/* |
| 445 |
* Find or create the atom for a string. Return null on failure to allocate |
| 446 |
* memory. |
| 447 |
*/ |
| 448 |
extern JSAtom * |
| 449 |
js_AtomizeString(JSContext *cx, JSString *str, uintN flags); |
| 450 |
|
| 451 |
extern JSAtom * |
| 452 |
js_Atomize(JSContext *cx, const char *bytes, size_t length, uintN flags); |
| 453 |
|
| 454 |
extern JSAtom * |
| 455 |
js_AtomizeChars(JSContext *cx, const jschar *chars, size_t length, uintN flags); |
| 456 |
|
| 457 |
/* |
| 458 |
* Return an existing atom for the given char array or null if the char |
| 459 |
* sequence is currently not atomized. |
| 460 |
*/ |
| 461 |
extern JSAtom * |
| 462 |
js_GetExistingStringAtom(JSContext *cx, const jschar *chars, size_t length); |
| 463 |
|
| 464 |
/* |
| 465 |
* This variant handles all primitive values. |
| 466 |
*/ |
| 467 |
JSBool |
| 468 |
js_AtomizePrimitiveValue(JSContext *cx, jsval v, JSAtom **atomp); |
| 469 |
|
| 470 |
/* |
| 471 |
* Convert v to an atomized string and wrap it as an id. |
| 472 |
*/ |
| 473 |
extern JSBool |
| 474 |
js_ValueToStringId(JSContext *cx, jsval v, jsid *idp); |
| 475 |
|
| 476 |
#ifdef DEBUG |
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|
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extern JS_FRIEND_API(void) |
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js_DumpAtoms(JSContext *cx, FILE *fp); |
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|
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#endif |
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|
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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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* 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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*/ |
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extern void |
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js_InitAtomMap(JSContext *cx, JSAtomMap *map, JSAtomList *al); |
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|
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JS_END_EXTERN_C |
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|
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#endif /* jsatom_h___ */ |
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