1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 *
3 * ***** BEGIN LICENSE BLOCK *****
4 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 *
6 * The contents of this file are subject to the Mozilla Public License Version
7 * 1.1 (the "License"); you may not use this file except in compliance with
8 * the License. You may obtain a copy of the License at
9 * http://www.mozilla.org/MPL/
10 *
11 * Software distributed under the License is distributed on an "AS IS" basis,
12 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 * for the specific language governing rights and limitations under the
14 * License.
15 *
16 * The Original Code is Mozilla Communicator client code, released
17 * March 31, 1998.
18 *
19 * The Initial Developer of the Original Code is
20 * Netscape Communications Corporation.
21 * Portions created by the Initial Developer are Copyright (C) 1998
22 * the Initial Developer. All Rights Reserved.
23 *
24 * Contributor(s):
25 *
26 * Alternatively, the contents of this file may be used under the terms of
27 * either of the GNU General Public License Version 2 or later (the "GPL"),
28 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 * in which case the provisions of the GPL or the LGPL are applicable instead
30 * of those above. If you wish to allow use of your version of this file only
31 * under the terms of either the GPL or the LGPL, and not to allow others to
32 * use your version of this file under the terms of the MPL, indicate your
33 * decision by deleting the provisions above and replace them with the notice
34 * and other provisions required by the GPL or the LGPL. If you do not delete
35 * the provisions above, a recipient may use your version of this file under
36 * the terms of any one of the MPL, the GPL or the LGPL.
37 *
38 * ***** END LICENSE BLOCK ***** */
40 #ifndef jspubtd_h___
41 #define jspubtd_h___
42 /*
43 * JS public API typedefs.
44 */
45 #include "jstypes.h"
46 #include "jscompat.h"
48 JS_BEGIN_EXTERN_C
50 /* Scalar typedefs. */
51 typedef uint16 jschar;
52 typedef int32 jsint;
53 typedef uint32 jsuint;
54 typedef float64 jsdouble;
55 typedef jsword jsval;
56 typedef jsword jsid;
57 typedef int32 jsrefcount; /* PRInt32 if JS_THREADSAFE, see jslock.h */
59 /*
60 * Run-time version enumeration. See jsconfig.h for compile-time counterparts
61 * to these values that may be selected by the JS_VERSION macro, and tested by
62 * #if expressions.
63 */
64 typedef enum JSVersion {
65 JSVERSION_1_0 = 100,
66 JSVERSION_1_1 = 110,
67 JSVERSION_1_2 = 120,
68 JSVERSION_1_3 = 130,
69 JSVERSION_1_4 = 140,
70 JSVERSION_ECMA_3 = 148,
71 JSVERSION_1_5 = 150,
72 JSVERSION_DEFAULT = 0,
73 JSVERSION_UNKNOWN = -1
74 } JSVersion;
76 #define JSVERSION_IS_ECMA(version) \
77 ((version) == JSVERSION_DEFAULT || (version) >= JSVERSION_1_3)
79 /* Result of typeof operator enumeration. */
80 typedef enum JSType {
81 JSTYPE_VOID, /* undefined */
82 JSTYPE_OBJECT, /* object */
83 JSTYPE_FUNCTION, /* function */
84 JSTYPE_STRING, /* string */
85 JSTYPE_NUMBER, /* number */
86 JSTYPE_BOOLEAN, /* boolean */
87 JSTYPE_LIMIT
88 } JSType;
90 /* JSObjectOps.checkAccess mode enumeration. */
91 typedef enum JSAccessMode {
92 JSACC_PROTO = 0, /* XXXbe redundant w.r.t. id */
93 JSACC_PARENT = 1, /* XXXbe redundant w.r.t. id */
94 JSACC_IMPORT = 2, /* import foo.bar */
95 JSACC_WATCH = 3, /* a watchpoint on object foo for id 'bar' */
96 JSACC_READ = 4, /* a "get" of foo.bar */
97 JSACC_WRITE = 8, /* a "set" of foo.bar = baz */
98 JSACC_LIMIT
99 } JSAccessMode;
101 #define JSACC_TYPEMASK (JSACC_WRITE - 1)
103 /*
104 * This enum type is used to control the behavior of a JSObject property
105 * iterator function that has type JSNewEnumerate.
106 */
107 typedef enum JSIterateOp {
108 JSENUMERATE_INIT, /* Create new iterator state */
109 JSENUMERATE_NEXT, /* Iterate once */
110 JSENUMERATE_DESTROY /* Destroy iterator state */
111 } JSIterateOp;
113 /* Struct typedefs. */
114 typedef struct JSClass JSClass;
115 typedef struct JSConstDoubleSpec JSConstDoubleSpec;
116 typedef struct JSContext JSContext;
117 typedef struct JSErrorReport JSErrorReport;
118 typedef struct JSFunction JSFunction;
119 typedef struct JSFunctionSpec JSFunctionSpec;
120 typedef struct JSIdArray JSIdArray;
121 typedef struct JSProperty JSProperty;
122 typedef struct JSPropertySpec JSPropertySpec;
123 typedef struct JSObject JSObject;
124 typedef struct JSObjectMap JSObjectMap;
125 typedef struct JSObjectOps JSObjectOps;
126 typedef struct JSRuntime JSRuntime;
127 typedef struct JSRuntime JSTaskState; /* XXX deprecated name */
128 typedef struct JSScript JSScript;
129 typedef struct JSString JSString;
130 typedef struct JSXDRState JSXDRState;
131 typedef struct JSExceptionState JSExceptionState;
132 typedef struct JSLocaleCallbacks JSLocaleCallbacks;
134 /* JSClass (and JSObjectOps where appropriate) function pointer typedefs. */
136 /*
137 * Add, delete, get or set a property named by id in obj. Note the jsval id
138 * type -- id may be a string (Unicode property identifier) or an int (element
139 * index). The *vp out parameter, on success, is the new property value after
140 * an add, get, or set. After a successful delete, *vp is JSVAL_FALSE iff
141 * obj[id] can't be deleted (because it's permanent).
142 */
143 typedef JSBool
144 (* JS_DLL_CALLBACK JSPropertyOp)(JSContext *cx, JSObject *obj, jsval id,
145 jsval *vp);
147 /*
148 * This function type is used for callbacks that enumerate the properties of
149 * a JSObject. The behavior depends on the value of enum_op:
150 *
151 * JSENUMERATE_INIT
152 * A new, opaque iterator state should be allocated and stored in *statep.
153 * (You can use PRIVATE_TO_JSVAL() to tag the pointer to be stored).
154 *
155 * The number of properties that will be enumerated should be returned as
156 * an integer jsval in *idp, if idp is non-null, and provided the number of
157 * enumerable properties is known. If idp is non-null and the number of
158 * enumerable properties can't be computed in advance, *idp should be set
159 * to JSVAL_ZERO.
160 *
161 * JSENUMERATE_NEXT
162 * A previously allocated opaque iterator state is passed in via statep.
163 * Return the next jsid in the iteration using *idp. The opaque iterator
164 * state pointed at by statep is destroyed and *statep is set to JSVAL_NULL
165 * if there are no properties left to enumerate.
166 *
167 * JSENUMERATE_DESTROY
168 * Destroy the opaque iterator state previously allocated in *statep by a
169 * call to this function when enum_op was JSENUMERATE_INIT.
170 *
171 * The return value is used to indicate success, with a value of JS_FALSE
172 * indicating failure.
173 */
174 typedef JSBool
175 (* JS_DLL_CALLBACK JSNewEnumerateOp)(JSContext *cx, JSObject *obj,
176 JSIterateOp enum_op,
177 jsval *statep, jsid *idp);
179 /*
180 * The old-style JSClass.enumerate op should define all lazy properties not
181 * yet reflected in obj.
182 */
183 typedef JSBool
184 (* JS_DLL_CALLBACK JSEnumerateOp)(JSContext *cx, JSObject *obj);
186 /*
187 * Resolve a lazy property named by id in obj by defining it directly in obj.
188 * Lazy properties are those reflected from some peer native property space
189 * (e.g., the DOM attributes for a given node reflected as obj) on demand.
190 *
191 * JS looks for a property in an object, and if not found, tries to resolve
192 * the given id. If resolve succeeds, the engine looks again in case resolve
193 * defined obj[id]. If no such property exists directly in obj, the process
194 * is repeated with obj's prototype, etc.
195 *
196 * NB: JSNewResolveOp provides a cheaper way to resolve lazy properties.
197 */
198 typedef JSBool
199 (* JS_DLL_CALLBACK JSResolveOp)(JSContext *cx, JSObject *obj, jsval id);
201 /*
202 * Like JSResolveOp, but flags provide contextual information as follows:
203 *
204 * JSRESOLVE_QUALIFIED a qualified property id: obj.id or obj[id], not id
205 * JSRESOLVE_ASSIGNING obj[id] is on the left-hand side of an assignment
206 *
207 * The *objp out parameter, on success, should be null to indicate that id
208 * was not resolved; and non-null, referring to obj or one of its prototypes,
209 * if id was resolved.
210 *
211 * This hook instead of JSResolveOp is called via the JSClass.resolve member
212 * if JSCLASS_NEW_RESOLVE is set in JSClass.flags.
213 *
214 * Setting JSCLASS_NEW_RESOLVE and JSCLASS_NEW_RESOLVE_GETS_START further
215 * extends this hook by passing in the starting object on the prototype chain
216 * via *objp. Thus a resolve hook implementation may define the property id
217 * being resolved in the object in which the id was first sought, rather than
218 * in a prototype object whose class led to the resolve hook being called.
219 *
220 * When using JSCLASS_NEW_RESOLVE_GETS_START, the resolve hook must therefore
221 * null *objp to signify "not resolved". With only JSCLASS_NEW_RESOLVE and no
222 * JSCLASS_NEW_RESOLVE_GETS_START, the hook can assume *objp is null on entry.
223 * This is not good practice, but enough existing hook implementations count
224 * on it that we can't break compatibility by passing the starting object in
225 * *objp without a new JSClass flag.
226 */
227 typedef JSBool
228 (* JS_DLL_CALLBACK JSNewResolveOp)(JSContext *cx, JSObject *obj, jsval id,
229 uintN flags, JSObject **objp);
231 /*
232 * Convert obj to the given type, returning true with the resulting value in
233 * *vp on success, and returning false on error or exception.
234 */
235 typedef JSBool
236 (* JS_DLL_CALLBACK JSConvertOp)(JSContext *cx, JSObject *obj, JSType type,
237 jsval *vp);
239 /*
240 * Finalize obj, which the garbage collector has determined to be unreachable
241 * from other live objects or from GC roots. Obviously, finalizers must never
242 * store a reference to obj.
243 */
244 typedef void
245 (* JS_DLL_CALLBACK JSFinalizeOp)(JSContext *cx, JSObject *obj);
247 /*
248 * Used by JS_AddExternalStringFinalizer and JS_RemoveExternalStringFinalizer
249 * to extend and reduce the set of string types finalized by the GC.
250 */
251 typedef void
252 (* JS_DLL_CALLBACK JSStringFinalizeOp)(JSContext *cx, JSString *str);
254 /*
255 * The signature for JSClass.getObjectOps, used by JS_NewObject's internals
256 * to discover the set of high-level object operations to use for new objects
257 * of the given class. All native objects have a JSClass, which is stored as
258 * a private (int-tagged) pointer in obj->slots[JSSLOT_CLASS]. In contrast,
259 * all native and host objects have a JSObjectMap at obj->map, which may be
260 * shared among a number of objects, and which contains the JSObjectOps *ops
261 * pointer used to dispatch object operations from API calls.
262 *
263 * Thus JSClass (which pre-dates JSObjectOps in the API) provides a low-level
264 * interface to class-specific code and data, while JSObjectOps allows for a
265 * higher level of operation, which does not use the object's class except to
266 * find the class's JSObjectOps struct, by calling clasp->getObjectOps.
267 *
268 * If this seems backwards, that's because it is! API compatibility requires
269 * a JSClass *clasp parameter to JS_NewObject, etc. Most host objects do not
270 * need to implement the larger JSObjectOps, and can share the common JSScope
271 * code and data used by the native (js_ObjectOps, see jsobj.c) ops.
272 */
273 typedef JSObjectOps *
274 (* JS_DLL_CALLBACK JSGetObjectOps)(JSContext *cx, JSClass *clasp);
276 /*
277 * JSClass.checkAccess type: check whether obj[id] may be accessed per mode,
278 * returning false on error/exception, true on success with obj[id]'s last-got
279 * value in *vp, and its attributes in *attrsp. As for JSPropertyOp above, id
280 * is either a string or an int jsval.
281 *
282 * See JSCheckAccessIdOp, below, for the JSObjectOps counterpart, which takes
283 * a jsid (a tagged int or aligned, unique identifier pointer) rather than a
284 * jsval. The native js_ObjectOps.checkAccess simply forwards to the object's
285 * clasp->checkAccess, so that both JSClass and JSObjectOps implementors may
286 * specialize access checks.
287 */
288 typedef JSBool
289 (* JS_DLL_CALLBACK JSCheckAccessOp)(JSContext *cx, JSObject *obj, jsval id,
290 JSAccessMode mode, jsval *vp);
292 /*
293 * Encode or decode an object, given an XDR state record representing external
294 * data. See jsxdrapi.h.
295 */
296 typedef JSBool
297 (* JS_DLL_CALLBACK JSXDRObjectOp)(JSXDRState *xdr, JSObject **objp);
299 /*
300 * Check whether v is an instance of obj. Return false on error or exception,
301 * true on success with JS_TRUE in *bp if v is an instance of obj, JS_FALSE in
302 * *bp otherwise.
303 */
304 typedef JSBool
305 (* JS_DLL_CALLBACK JSHasInstanceOp)(JSContext *cx, JSObject *obj, jsval v,
306 JSBool *bp);
308 /*
309 * Function type for JSClass.mark and JSObjectOps.mark, called from the GC to
310 * scan live GC-things reachable from obj's private data structure. For each
311 * such thing, a mark implementation must call
312 *
313 * JS_MarkGCThing(cx, thing, name, arg);
314 *
315 * The trailing name and arg parameters are used for GC_MARK_DEBUG-mode heap
316 * dumping and ref-path tracing. The mark function should pass a (typically
317 * literal) string naming the private data member for name, and it must pass
318 * the opaque arg parameter through from its caller.
319 *
320 * For the JSObjectOps.mark hook, the return value is the number of slots at
321 * obj->slots to scan. For JSClass.mark, the return value is ignored.
322 *
323 * NB: JSMarkOp implementations cannot allocate new GC-things (JS_NewObject
324 * called from a mark function will fail silently, e.g.).
325 */
326 typedef uint32
327 (* JS_DLL_CALLBACK JSMarkOp)(JSContext *cx, JSObject *obj, void *arg);
329 /*
330 * The optional JSClass.reserveSlots hook allows a class to make computed
331 * per-instance object slots reservations, in addition to or instead of using
332 * JSCLASS_HAS_RESERVED_SLOTS(n) in the JSClass.flags initializer to reserve
333 * a constant-per-class number of slots. Implementations of this hook should
334 * return the number of slots to reserve, not including any reserved by using
335 * JSCLASS_HAS_RESERVED_SLOTS(n) in JSClass.flags.
336 *
337 * NB: called with obj locked by the JSObjectOps-specific mutual exclusion
338 * mechanism appropriate for obj, so don't nest other operations that might
339 * also lock obj.
340 */
341 typedef uint32
342 (* JS_DLL_CALLBACK JSReserveSlotsOp)(JSContext *cx, JSObject *obj);
344 /* JSObjectOps function pointer typedefs. */
346 /*
347 * Create a new subclass of JSObjectMap (see jsobj.h), with the nrefs and ops
348 * members initialized from the same-named parameters, and with the nslots and
349 * freeslot members initialized according to ops and clasp. Return null on
350 * error, non-null on success.
351 *
352 * JSObjectMaps are reference-counted by generic code in the engine. Usually,
353 * the nrefs parameter to JSObjectOps.newObjectMap will be 1, to count the ref
354 * returned to the caller on success. After a successful construction, some
355 * number of js_HoldObjectMap and js_DropObjectMap calls ensue. When nrefs
356 * reaches 0 due to a js_DropObjectMap call, JSObjectOps.destroyObjectMap will
357 * be called to dispose of the map.
358 */
359 typedef JSObjectMap *
360 (* JS_DLL_CALLBACK JSNewObjectMapOp)(JSContext *cx, jsrefcount nrefs,
361 JSObjectOps *ops, JSClass *clasp,
362 JSObject *obj);
364 /*
365 * Generic type for an infallible JSObjectMap operation, used currently by
366 * JSObjectOps.destroyObjectMap.
367 */
368 typedef void
369 (* JS_DLL_CALLBACK JSObjectMapOp)(JSContext *cx, JSObjectMap *map);
371 /*
372 * Look for id in obj and its prototype chain, returning false on error or
373 * exception, true on success. On success, return null in *propp if id was
374 * not found. If id was found, return the first object searching from obj
375 * along its prototype chain in which id names a direct property in *objp, and
376 * return a non-null, opaque property pointer in *propp.
377 *
378 * If JSLookupPropOp succeeds and returns with *propp non-null, that pointer
379 * may be passed as the prop parameter to a JSAttributesOp, as a short-cut
380 * that bypasses id re-lookup. In any case, a non-null *propp result after a
381 * successful lookup must be dropped via JSObjectOps.dropProperty.
382 *
383 * NB: successful return with non-null *propp means the implementation may
384 * have locked *objp and added a reference count associated with *propp, so
385 * callers should not risk deadlock by nesting or interleaving other lookups
386 * or any obj-bearing ops before dropping *propp.
387 */
388 typedef JSBool
389 (* JS_DLL_CALLBACK JSLookupPropOp)(JSContext *cx, JSObject *obj, jsid id,
390 JSObject **objp, JSProperty **propp
391 #if defined JS_THREADSAFE && defined DEBUG
392 , const char *file, uintN line
393 #endif
394 );
396 /*
397 * Define obj[id], a direct property of obj named id, having the given initial
398 * value, with the specified getter, setter, and attributes. If the propp out
399 * param is non-null, *propp on successful return contains an opaque property
400 * pointer usable as a speedup hint with JSAttributesOp. But note that propp
401 * may be null, indicating that the caller is not interested in recovering an
402 * opaque pointer to the newly-defined property.
403 *
404 * If propp is non-null and JSDefinePropOp succeeds, its caller must be sure
405 * to drop *propp using JSObjectOps.dropProperty in short order, just as with
406 * JSLookupPropOp.
407 */
408 typedef JSBool
409 (* JS_DLL_CALLBACK JSDefinePropOp)(JSContext *cx, JSObject *obj,
410 jsid id, jsval value,
411 JSPropertyOp getter, JSPropertyOp setter,
412 uintN attrs, JSProperty **propp);
414 /*
415 * Get, set, or delete obj[id], returning false on error or exception, true
416 * on success. If getting or setting, the new value is returned in *vp on
417 * success. If deleting without error, *vp will be JSVAL_FALSE if obj[id] is
418 * permanent, and JSVAL_TRUE if id named a direct property of obj that was in
419 * fact deleted, or if id names no direct property of obj (id could name a
420 * prototype property, or no property in obj or its prototype chain).
421 */
422 typedef JSBool
423 (* JS_DLL_CALLBACK JSPropertyIdOp)(JSContext *cx, JSObject *obj, jsid id,
424 jsval *vp);
426 /*
427 * Get or set attributes of the property obj[id]. Return false on error or
428 * exception, true with current attributes in *attrsp. If prop is non-null,
429 * it must come from the *propp out parameter of a prior JSDefinePropOp or
430 * JSLookupPropOp call.
431 */
432 typedef JSBool
433 (* JS_DLL_CALLBACK JSAttributesOp)(JSContext *cx, JSObject *obj, jsid id,
434 JSProperty *prop, uintN *attrsp);
436 /*
437 * JSObjectOps.checkAccess type: check whether obj[id] may be accessed per
438 * mode, returning false on error/exception, true on success with obj[id]'s
439 * last-got value in *vp, and its attributes in *attrsp.
440 */
441 typedef JSBool
442 (* JS_DLL_CALLBACK JSCheckAccessIdOp)(JSContext *cx, JSObject *obj, jsid id,
443 JSAccessMode mode, jsval *vp,
444 uintN *attrsp);
446 /*
447 * A generic type for functions mapping an object to another object, or null
448 * if an error or exception was thrown on cx. Used by JSObjectOps.thisObject
449 * at present.
450 */
451 typedef JSObject *
452 (* JS_DLL_CALLBACK JSObjectOp)(JSContext *cx, JSObject *obj);
454 /*
455 * A generic type for functions taking a context, object, and property, with
456 * no return value. Used by JSObjectOps.dropProperty currently (see above,
457 * JSDefinePropOp and JSLookupPropOp, for the object-locking protocol in which
458 * dropProperty participates).
459 */
460 typedef void
461 (* JS_DLL_CALLBACK JSPropertyRefOp)(JSContext *cx, JSObject *obj,
462 JSProperty *prop);
464 /*
465 * Function type for JSObjectOps.setProto and JSObjectOps.setParent. These
466 * hooks must check for cycles without deadlocking, and otherwise take special
467 * steps. See jsobj.c, js_SetProtoOrParent, for an example.
468 */
469 typedef JSBool
470 (* JS_DLL_CALLBACK JSSetObjectSlotOp)(JSContext *cx, JSObject *obj,
471 uint32 slot, JSObject *pobj);
473 /*
474 * Get and set a required slot, one that should already have been allocated.
475 * These operations are infallible, so required slots must be pre-allocated,
476 * or implementations must suppress out-of-memory errors. The native ops
477 * (js_ObjectOps, see jsobj.c) access slots reserved by including a call to
478 * the JSCLASS_HAS_RESERVED_SLOTS(n) macro in the JSClass.flags initializer.
479 *
480 * NB: the slot parameter is a zero-based index into obj->slots[], unlike the
481 * index parameter to the JS_GetReservedSlot and JS_SetReservedSlot API entry
482 * points, which is a zero-based index into the JSCLASS_RESERVED_SLOTS(clasp)
483 * reserved slots that come after the initial well-known slots: proto, parent,
484 * class, and optionally, the private data slot.
485 */
486 typedef jsval
487 (* JS_DLL_CALLBACK JSGetRequiredSlotOp)(JSContext *cx, JSObject *obj,
488 uint32 slot);
490 typedef JSBool
491 (* JS_DLL_CALLBACK JSSetRequiredSlotOp)(JSContext *cx, JSObject *obj,
492 uint32 slot, jsval v);
494 /* Typedef for native functions called by the JS VM. */
496 typedef JSBool
497 (* JS_DLL_CALLBACK JSNative)(JSContext *cx, JSObject *obj, uintN argc,
498 jsval *argv, jsval *rval);
500 /* Callbacks and their arguments. */
502 typedef enum JSGCStatus {
503 JSGC_BEGIN,
504 JSGC_END,
505 JSGC_MARK_END,
506 JSGC_FINALIZE_END
507 } JSGCStatus;
509 typedef JSBool
510 (* JS_DLL_CALLBACK JSGCCallback)(JSContext *cx, JSGCStatus status);
512 typedef JSBool
513 (* JS_DLL_CALLBACK JSBranchCallback)(JSContext *cx, JSScript *script);
515 typedef void
516 (* JS_DLL_CALLBACK JSErrorReporter)(JSContext *cx, const char *message,
517 JSErrorReport *report);
519 typedef struct JSErrorFormatString {
520 const char *format;
521 uintN argCount;
522 } JSErrorFormatString;
524 typedef const JSErrorFormatString *
525 (* JS_DLL_CALLBACK JSErrorCallback)(void *userRef, const char *locale,
526 const uintN errorNumber);
528 #ifdef va_start
529 #define JS_ARGUMENT_FORMATTER_DEFINED 1
531 typedef JSBool
532 (* JS_DLL_CALLBACK JSArgumentFormatter)(JSContext *cx, const char *format,
533 JSBool fromJS, jsval **vpp,
534 va_list *app);
535 #endif
537 typedef JSBool
538 (* JS_DLL_CALLBACK JSLocaleToUpperCase)(JSContext *cx, JSString *src,
539 jsval *rval);
541 typedef JSBool
542 (* JS_DLL_CALLBACK JSLocaleToLowerCase)(JSContext *cx, JSString *src,
543 jsval *rval);
545 typedef JSBool
546 (* JS_DLL_CALLBACK JSLocaleCompare)(JSContext *cx,
547 JSString *src1, JSString *src2,
548 jsval *rval);
550 typedef JSBool
551 (* JS_DLL_CALLBACK JSLocaleToUnicode)(JSContext *cx, char *src, jsval *rval);
553 /*
554 * Security protocol types.
555 */
556 typedef struct JSPrincipals JSPrincipals;
558 /*
559 * XDR-encode or -decode a principals instance, based on whether xdr->mode is
560 * JSXDR_ENCODE, in which case *principalsp should be encoded; or JSXDR_DECODE,
561 * in which case implementations must return a held (via JSPRINCIPALS_HOLD),
562 * non-null *principalsp out parameter. Return true on success, false on any
563 * error, which the implementation must have reported.
564 */
565 typedef JSBool
566 (* JS_DLL_CALLBACK JSPrincipalsTranscoder)(JSXDRState *xdr,
567 JSPrincipals **principalsp);
569 /*
570 * Return a weak reference to the principals associated with obj, possibly via
571 * the immutable parent chain leading from obj to a top-level container (e.g.,
572 * a window object in the DOM level 0). If there are no principals associated
573 * with obj, return null. Therefore null does not mean an error was reported;
574 * in no event should an error be reported or an exception be thrown by this
575 * callback's implementation.
576 */
577 typedef JSPrincipals *
578 (* JS_DLL_CALLBACK JSObjectPrincipalsFinder)(JSContext *cx, JSObject *obj);
580 JS_END_EXTERN_C
582 #endif /* jspubtd_h___ */