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gecko/js/src/jsprvtd.h

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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef jsprvtd_h___
#define jsprvtd_h___
/*
* JS private typename definitions.
*
* This header is included only in other .h files, for convenience and for
* simplicity of type naming. The alternative for structures is to use tags,
* which are named the same as their typedef names (legal in C/C++, and less
* noisy than suffixing the typedef name with "Struct" or "Str"). Instead,
* all .h files that include this file may use the same typedef name, whether
* declaring a pointer to struct type, or defining a member of struct type.
*
* A few fundamental scalar types are defined here too. Neither the scalar
* nor the struct typedefs should change much, therefore the nearly-global
* make dependency induced by this file should not prove painful.
*/
#include "jspubtd.h"
#include "jsutil.h"
/* Internal identifier (jsid) macros. */
#define JSID_IS_ATOM(id) JSVAL_IS_STRING((jsval)(id))
#define JSID_TO_ATOM(id) ((JSAtom *)(id))
#define ATOM_TO_JSID(atom) (JS_ASSERT(ATOM_IS_STRING(atom)), \
(jsid)(atom))
#define JSID_IS_INT(id) JSVAL_IS_INT((jsval)(id))
#define JSID_TO_INT(id) JSVAL_TO_INT((jsval)(id))
#define INT_TO_JSID(i) ((jsid)INT_TO_JSVAL(i))
#define INT_JSVAL_TO_JSID(v) ((jsid)(v))
#define INT_JSID_TO_JSVAL(id) ((jsval)(id))
#define JSID_IS_OBJECT(id) JSVAL_IS_OBJECT((jsval)(id))
#define JSID_TO_OBJECT(id) JSVAL_TO_OBJECT((jsval)(id))
#define OBJECT_TO_JSID(obj) ((jsid)OBJECT_TO_JSVAL(obj))
#define OBJECT_JSVAL_TO_JSID(v) ((jsid)v)
#define ID_TO_VALUE(id) ((jsval)(id))
/*
* Convenience constants.
*/
#define JS_BITS_PER_UINT32_LOG2 5
#define JS_BITS_PER_UINT32 32
/* Scalar typedefs. */
typedef uint8 jsbytecode;
typedef uint8 jssrcnote;
typedef uint32 jsatomid;
/* Struct typedefs. */
typedef struct JSArgumentFormatMap JSArgumentFormatMap;
typedef struct JSCodeGenerator JSCodeGenerator;
typedef struct JSGCThing JSGCThing;
typedef struct JSGenerator JSGenerator;
typedef struct JSNativeEnumerator JSNativeEnumerator;
typedef struct JSCompiler JSCompiler;
typedef struct JSFunctionBox JSFunctionBox;
typedef struct JSObjectBox JSObjectBox;
typedef struct JSParseNode JSParseNode;
typedef struct JSPropCacheEntry JSPropCacheEntry;
typedef struct JSProperty JSProperty;
typedef struct JSSharpObjectMap JSSharpObjectMap;
typedef struct JSTempValueRooter JSTempValueRooter;
typedef struct JSThread JSThread;
typedef struct JSThreadData JSThreadData;
typedef struct JSToken JSToken;
typedef struct JSTokenPos JSTokenPos;
typedef struct JSTokenPtr JSTokenPtr;
typedef struct JSTokenStream JSTokenStream;
typedef struct JSTraceMonitor JSTraceMonitor;
typedef struct JSTreeContext JSTreeContext;
typedef struct JSTryNote JSTryNote;
typedef struct JSWeakRoots JSWeakRoots;
/* Friend "Advanced API" typedefs. */
typedef struct JSAtom JSAtom;
typedef struct JSAtomList JSAtomList;
typedef struct JSAtomListElement JSAtomListElement;
typedef struct JSAtomMap JSAtomMap;
typedef struct JSAtomState JSAtomState;
typedef struct JSCodeSpec JSCodeSpec;
typedef struct JSPrinter JSPrinter;
typedef struct JSRegExp JSRegExp;
typedef struct JSRegExpStatics JSRegExpStatics;
typedef struct JSScope JSScope;
typedef struct JSScopeOps JSScopeOps;
typedef struct JSScopeProperty JSScopeProperty;
typedef struct JSStackHeader JSStackHeader;
typedef struct JSStringBuffer JSStringBuffer;
typedef struct JSSubString JSSubString;
typedef struct JSTraceableNative JSTraceableNative;
typedef struct JSXML JSXML;
typedef struct JSXMLArray JSXMLArray;
typedef struct JSXMLArrayCursor JSXMLArrayCursor;
/* "Friend" types used by jscntxt.h and jsdbgapi.h. */
typedef enum JSTrapStatus {
JSTRAP_ERROR,
JSTRAP_CONTINUE,
JSTRAP_RETURN,
JSTRAP_THROW,
JSTRAP_LIMIT
} JSTrapStatus;
typedef JSTrapStatus
(* JSTrapHandler)(JSContext *cx, JSScript *script, jsbytecode *pc, jsval *rval,
void *closure);
typedef JSBool
(* JSWatchPointHandler)(JSContext *cx, JSObject *obj, jsval id, jsval old,
jsval *newp, void *closure);
/* called just after script creation */
typedef void
(* JSNewScriptHook)(JSContext *cx,
const char *filename, /* URL of script */
uintN lineno, /* first line */
JSScript *script,
JSFunction *fun,
void *callerdata);
/* called just before script destruction */
typedef void
(* JSDestroyScriptHook)(JSContext *cx,
JSScript *script,
void *callerdata);
typedef void
(* JSSourceHandler)(const char *filename, uintN lineno, jschar *str,
size_t length, void **listenerTSData, void *closure);
/*
* This hook captures high level script execution and function calls (JS or
* native). It is used by JS_SetExecuteHook to hook top level scripts and by
* JS_SetCallHook to hook function calls. It will get called twice per script
* or function call: just before execution begins and just after it finishes.
* In both cases the 'current' frame is that of the executing code.
*
* The 'before' param is JS_TRUE for the hook invocation before the execution
* and JS_FALSE for the invocation after the code has run.
*
* The 'ok' param is significant only on the post execution invocation to
* signify whether or not the code completed 'normally'.
*
* The 'closure' param is as passed to JS_SetExecuteHook or JS_SetCallHook
* for the 'before'invocation, but is whatever value is returned from that
* invocation for the 'after' invocation. Thus, the hook implementor *could*
* allocate a structure in the 'before' invocation and return a pointer to that
* structure. The pointer would then be handed to the hook for the 'after'
* invocation. Alternately, the 'before' could just return the same value as
* in 'closure' to cause the 'after' invocation to be called with the same
* 'closure' value as the 'before'.
*
* Returning NULL in the 'before' hook will cause the 'after' hook *not* to
* be called.
*/
typedef void *
(* JSInterpreterHook)(JSContext *cx, JSStackFrame *fp, JSBool before,
JSBool *ok, void *closure);
typedef void
(* JSObjectHook)(JSContext *cx, JSObject *obj, JSBool isNew, void *closure);
typedef JSBool
(* JSDebugErrorHook)(JSContext *cx, const char *message, JSErrorReport *report,
void *closure);
typedef struct JSDebugHooks {
JSTrapHandler interruptHandler;
void *interruptHandlerData;
JSNewScriptHook newScriptHook;
void *newScriptHookData;
JSDestroyScriptHook destroyScriptHook;
void *destroyScriptHookData;
JSTrapHandler debuggerHandler;
void *debuggerHandlerData;
JSSourceHandler sourceHandler;
void *sourceHandlerData;
JSInterpreterHook executeHook;
void *executeHookData;
JSInterpreterHook callHook;
void *callHookData;
JSObjectHook objectHook;
void *objectHookData;
JSTrapHandler throwHook;
void *throwHookData;
JSDebugErrorHook debugErrorHook;
void *debugErrorHookData;
} JSDebugHooks;
/*
* Type definitions for temporary GC roots that register with GC local C
* variables. See jscntxt.h for details.
*/
typedef void
(* JSTempValueTrace)(JSTracer *trc, JSTempValueRooter *tvr);
typedef union JSTempValueUnion {
jsval value;
JSObject *object;
JSString *string;
JSXML *xml;
JSTempValueTrace trace;
JSScopeProperty *sprop;
JSWeakRoots *weakRoots;
JSCompiler *compiler;
JSScript *script;
jsval *array;
} JSTempValueUnion;
struct JSTempValueRooter {
JSTempValueRooter *down;
ptrdiff_t count;
JSTempValueUnion u;
};
/* JSObjectOps function pointer typedefs. */
/*
* Create a new subclass of JSObjectMap (see jsobj.h), with the nrefs and ops
* members initialized from the same-named parameters, and with the nslots and
* freeslot members initialized according to ops and clasp. Return null on
* error, non-null on success.
*
* JSObjectMaps are reference-counted by generic code in the engine. Usually,
* the nrefs parameter to JSObjectOps.newObjectMap will be 1, to count the ref
* returned to the caller on success. After a successful construction, some
* number of js_HoldObjectMap and js_DropObjectMap calls ensue. When nrefs
* reaches 0 due to a js_DropObjectMap call, JSObjectOps.destroyObjectMap will
* be called to dispose of the map.
*/
typedef JSObjectMap *
(* JSNewObjectMapOp)(JSContext *cx, jsrefcount nrefs, JSObjectOps *ops,
JSClass *clasp, JSObject *obj);
/*
* Generic type for an infallible JSObjectMap operation, used currently by
* JSObjectOps.destroyObjectMap.
*/
typedef void
(* JSObjectMapOp)(JSContext *cx, JSObjectMap *map);
/*
* Look for id in obj and its prototype chain, returning false on error or
* exception, true on success. On success, return null in *propp if id was
* not found. If id was found, return the first object searching from obj
* along its prototype chain in which id names a direct property in *objp, and
* return a non-null, opaque property pointer in *propp.
*
* If JSLookupPropOp succeeds and returns with *propp non-null, that pointer
* may be passed as the prop parameter to a JSAttributesOp, as a short-cut
* that bypasses id re-lookup. In any case, a non-null *propp result after a
* successful lookup must be dropped via JSObjectOps.dropProperty.
*
* NB: successful return with non-null *propp means the implementation may
* have locked *objp and added a reference count associated with *propp, so
* callers should not risk deadlock by nesting or interleaving other lookups
* or any obj-bearing ops before dropping *propp.
*/
typedef JSBool
(* JSLookupPropOp)(JSContext *cx, JSObject *obj, jsid id, JSObject **objp,
JSProperty **propp);
/*
* Define obj[id], a direct property of obj named id, having the given initial
* value, with the specified getter, setter, and attributes. If the propp out
* param is non-null, *propp on successful return contains an opaque property
* pointer usable as a speedup hint with JSAttributesOp. But note that propp
* may be null, indicating that the caller is not interested in recovering an
* opaque pointer to the newly-defined property.
*
* If propp is non-null and JSDefinePropOp succeeds, its caller must be sure
* to drop *propp using JSObjectOps.dropProperty in short order, just as with
* JSLookupPropOp.
*/
typedef JSBool
(* JSDefinePropOp)(JSContext *cx, JSObject *obj, jsid id, jsval value,
JSPropertyOp getter, JSPropertyOp setter, uintN attrs,
JSProperty **propp);
/*
* Get, set, or delete obj[id], returning false on error or exception, true
* on success. If getting or setting, the new value is returned in *vp on
* success. If deleting without error, *vp will be JSVAL_FALSE if obj[id] is
* permanent, and JSVAL_TRUE if id named a direct property of obj that was in
* fact deleted, or if id names no direct property of obj (id could name a
* prototype property, or no property in obj or its prototype chain).
*/
typedef JSBool
(* JSPropertyIdOp)(JSContext *cx, JSObject *obj, jsid id, jsval *vp);
/*
* Get or set attributes of the property obj[id]. Return false on error or
* exception, true with current attributes in *attrsp. If prop is non-null,
* it must come from the *propp out parameter of a prior JSDefinePropOp or
* JSLookupPropOp call.
*/
typedef JSBool
(* JSAttributesOp)(JSContext *cx, JSObject *obj, jsid id, JSProperty *prop,
uintN *attrsp);
/*
* JSObjectOps.checkAccess type: check whether obj[id] may be accessed per
* mode, returning false on error/exception, true on success with obj[id]'s
* last-got value in *vp, and its attributes in *attrsp.
*/
typedef JSBool
(* JSCheckAccessIdOp)(JSContext *cx, JSObject *obj, jsid id, JSAccessMode mode,
jsval *vp, uintN *attrsp);
/*
* A generic type for functions taking a context, object, and property, with
* no return value. Used by JSObjectOps.dropProperty currently (see above,
* JSDefinePropOp and JSLookupPropOp, for the object-locking protocol in which
* dropProperty participates).
*/
typedef void
(* JSPropertyRefOp)(JSContext *cx, JSObject *obj, JSProperty *prop);
/*
* Get and set a required slot, one that should already have been allocated.
* These operations are infallible, so required slots must be pre-allocated,
* or implementations must suppress out-of-memory errors. The native ops
* (js_ObjectOps, see jsobj.c) access slots reserved by including a call to
* the JSCLASS_HAS_RESERVED_SLOTS(n) macro in the JSClass.flags initializer.
*
* NB: the slot parameter is a zero-based index into obj slots, unlike the
* index parameter to the JS_GetReservedSlot and JS_SetReservedSlot API entry
* points, which is a zero-based index into the JSCLASS_RESERVED_SLOTS(clasp)
* reserved slots that come after the initial well-known slots: proto, parent,
* class, and optionally, the private data slot.
*/
typedef jsval
(* JSGetRequiredSlotOp)(JSContext *cx, JSObject *obj, uint32 slot);
typedef JSBool
(* JSSetRequiredSlotOp)(JSContext *cx, JSObject *obj, uint32 slot, jsval v);
/*
* The following determines whether JS_EncodeCharacters and JS_DecodeBytes
* treat char[] as utf-8 or simply as bytes that need to be inflated/deflated.
*/
#ifdef JS_C_STRINGS_ARE_UTF8
# define js_CStringsAreUTF8 JS_TRUE
#else
extern JSBool js_CStringsAreUTF8;
#endif
#endif /* jsprvtd_h___ */
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