gecko/js/src/jspubtd.h

617 lines
22 KiB
C

/* -*- 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 jspubtd_h___
#define jspubtd_h___
/*
* JS public API typedefs.
*/
#include "jstypes.h"
#include "jscompat.h"
#include "jsval.h"
JS_BEGIN_EXTERN_C
/* Scalar typedefs. */
typedef JSInt32 jsint;
typedef JSUint32 jsuint;
typedef float64 jsdouble;
typedef JSInt32 jsrefcount; /* PRInt32 if JS_THREADSAFE, see jslock.h */
#ifdef WIN32
typedef wchar_t jschar;
#else
typedef JSUint16 jschar;
#endif
/*
* Run-time version enumeration. See jsversion.h for compile-time counterparts
* to these values that may be selected by the JS_VERSION macro, and tested by
* #if expressions.
*/
typedef enum JSVersion {
JSVERSION_1_0 = 100,
JSVERSION_1_1 = 110,
JSVERSION_1_2 = 120,
JSVERSION_1_3 = 130,
JSVERSION_1_4 = 140,
JSVERSION_ECMA_3 = 148,
JSVERSION_1_5 = 150,
JSVERSION_1_6 = 160,
JSVERSION_1_7 = 170,
JSVERSION_1_8 = 180,
JSVERSION_ECMA_5 = 185,
JSVERSION_DEFAULT = 0,
JSVERSION_UNKNOWN = -1,
JSVERSION_LATEST = JSVERSION_ECMA_5
} JSVersion;
#define JSVERSION_IS_ECMA(version) \
((version) == JSVERSION_DEFAULT || (version) >= JSVERSION_1_3)
/* Result of typeof operator enumeration. */
typedef enum JSType {
JSTYPE_VOID, /* undefined */
JSTYPE_OBJECT, /* object */
JSTYPE_FUNCTION, /* function */
JSTYPE_STRING, /* string */
JSTYPE_NUMBER, /* number */
JSTYPE_BOOLEAN, /* boolean */
JSTYPE_NULL, /* null */
JSTYPE_XML, /* xml object */
JSTYPE_LIMIT
} JSType;
/* Dense index into cached prototypes and class atoms for standard objects. */
typedef enum JSProtoKey {
#define JS_PROTO(name,code,init) JSProto_##name = code,
#include "jsproto.tbl"
#undef JS_PROTO
JSProto_LIMIT
} JSProtoKey;
/* js_CheckAccess mode enumeration. */
typedef enum JSAccessMode {
JSACC_PROTO = 0, /* XXXbe redundant w.r.t. id */
JSACC_PARENT = 1, /* XXXbe redundant w.r.t. id */
/*
* enum value #2 formerly called JSACC_IMPORT,
* gap preserved for ABI compatibility.
*/
JSACC_WATCH = 3, /* a watchpoint on object foo for id 'bar' */
JSACC_READ = 4, /* a "get" of foo.bar */
JSACC_WRITE = 8, /* a "set" of foo.bar = baz */
JSACC_LIMIT
} JSAccessMode;
#define JSACC_TYPEMASK (JSACC_WRITE - 1)
/*
* This enum type is used to control the behavior of a JSObject property
* iterator function that has type JSNewEnumerate.
*/
typedef enum JSIterateOp {
/* Create new iterator state over enumerable properties. */
JSENUMERATE_INIT,
/* Create new iterator state over all properties. */
JSENUMERATE_INIT_ALL,
/* Iterate once. */
JSENUMERATE_NEXT,
/* Destroy iterator state. */
JSENUMERATE_DESTROY
} JSIterateOp;
/* Struct typedefs. */
typedef struct JSClass JSClass;
typedef struct JSConstDoubleSpec JSConstDoubleSpec;
typedef struct JSContext JSContext;
typedef struct JSErrorReport JSErrorReport;
typedef struct JSFunction JSFunction;
typedef struct JSFunctionSpec JSFunctionSpec;
typedef struct JSTracer JSTracer;
typedef struct JSIdArray JSIdArray;
typedef struct JSPropertyDescriptor JSPropertyDescriptor;
typedef struct JSPropertySpec JSPropertySpec;
typedef struct JSObjectMap JSObjectMap;
typedef struct JSRuntime JSRuntime;
typedef struct JSScript JSScript;
typedef struct JSStackFrame JSStackFrame;
typedef struct JSXDRState JSXDRState;
typedef struct JSExceptionState JSExceptionState;
typedef struct JSLocaleCallbacks JSLocaleCallbacks;
typedef struct JSSecurityCallbacks JSSecurityCallbacks;
typedef struct JSONParser JSONParser;
typedef struct JSCompartment JSCompartment;
typedef struct JSCrossCompartmentCall JSCrossCompartmentCall;
typedef struct JSStructuredCloneWriter JSStructuredCloneWriter;
typedef struct JSStructuredCloneReader JSStructuredCloneReader;
typedef struct JSStructuredCloneCallbacks JSStructuredCloneCallbacks;
#ifdef __cplusplus
typedef class JSWrapper JSWrapper;
typedef class JSCrossCompartmentWrapper JSCrossCompartmentWrapper;
#endif
/* JSClass (and js::ObjectOps where appropriate) function pointer typedefs. */
/*
* Add, delete, get or set a property named by id in obj. Note the jsid id
* type -- id may be a string (Unicode property identifier) or an int (element
* index). The *vp out parameter, on success, is the new property value after
* an add, get, or set. After a successful delete, *vp is JSVAL_FALSE iff
* obj[id] can't be deleted (because it's permanent).
*/
typedef JSBool
(* JSPropertyOp)(JSContext *cx, JSObject *obj, jsid id, jsval *vp);
/*
* This function type is used for callbacks that enumerate the properties of
* a JSObject. The behavior depends on the value of enum_op:
*
* JSENUMERATE_INIT
* A new, opaque iterator state should be allocated and stored in *statep.
* (You can use PRIVATE_TO_JSVAL() to tag the pointer to be stored).
*
* The number of properties that will be enumerated should be returned as
* an integer jsval in *idp, if idp is non-null, and provided the number of
* enumerable properties is known. If idp is non-null and the number of
* enumerable properties can't be computed in advance, *idp should be set
* to JSVAL_ZERO.
*
* JSENUMERATE_INIT_ALL
* Used identically to JSENUMERATE_INIT, but exposes all properties of the
* object regardless of enumerability.
*
* JSENUMERATE_NEXT
* A previously allocated opaque iterator state is passed in via statep.
* Return the next jsid in the iteration using *idp. The opaque iterator
* state pointed at by statep is destroyed and *statep is set to JSVAL_NULL
* if there are no properties left to enumerate.
*
* JSENUMERATE_DESTROY
* Destroy the opaque iterator state previously allocated in *statep by a
* call to this function when enum_op was JSENUMERATE_INIT or
* JSENUMERATE_INIT_ALL.
*
* The return value is used to indicate success, with a value of JS_FALSE
* indicating failure.
*/
typedef JSBool
(* JSNewEnumerateOp)(JSContext *cx, JSObject *obj, JSIterateOp enum_op,
jsval *statep, jsid *idp);
/*
* The old-style JSClass.enumerate op should define all lazy properties not
* yet reflected in obj.
*/
typedef JSBool
(* JSEnumerateOp)(JSContext *cx, JSObject *obj);
/*
* Resolve a lazy property named by id in obj by defining it directly in obj.
* Lazy properties are those reflected from some peer native property space
* (e.g., the DOM attributes for a given node reflected as obj) on demand.
*
* JS looks for a property in an object, and if not found, tries to resolve
* the given id. If resolve succeeds, the engine looks again in case resolve
* defined obj[id]. If no such property exists directly in obj, the process
* is repeated with obj's prototype, etc.
*
* NB: JSNewResolveOp provides a cheaper way to resolve lazy properties.
*/
typedef JSBool
(* JSResolveOp)(JSContext *cx, JSObject *obj, jsid id);
/*
* Like JSResolveOp, but flags provide contextual information as follows:
*
* JSRESOLVE_QUALIFIED a qualified property id: obj.id or obj[id], not id
* JSRESOLVE_ASSIGNING obj[id] is on the left-hand side of an assignment
* JSRESOLVE_DETECTING 'if (o.p)...' or similar detection opcode sequence
* JSRESOLVE_DECLARING var, const, or function prolog declaration opcode
* JSRESOLVE_CLASSNAME class name used when constructing
*
* The *objp out parameter, on success, should be null to indicate that id
* was not resolved; and non-null, referring to obj or one of its prototypes,
* if id was resolved.
*
* This hook instead of JSResolveOp is called via the JSClass.resolve member
* if JSCLASS_NEW_RESOLVE is set in JSClass.flags.
*
* Setting JSCLASS_NEW_RESOLVE and JSCLASS_NEW_RESOLVE_GETS_START further
* extends this hook by passing in the starting object on the prototype chain
* via *objp. Thus a resolve hook implementation may define the property id
* being resolved in the object in which the id was first sought, rather than
* in a prototype object whose class led to the resolve hook being called.
*
* When using JSCLASS_NEW_RESOLVE_GETS_START, the resolve hook must therefore
* null *objp to signify "not resolved". With only JSCLASS_NEW_RESOLVE and no
* JSCLASS_NEW_RESOLVE_GETS_START, the hook can assume *objp is null on entry.
* This is not good practice, but enough existing hook implementations count
* on it that we can't break compatibility by passing the starting object in
* *objp without a new JSClass flag.
*/
typedef JSBool
(* JSNewResolveOp)(JSContext *cx, JSObject *obj, jsid id, uintN flags,
JSObject **objp);
/*
* Convert obj to the given type, returning true with the resulting value in
* *vp on success, and returning false on error or exception.
*/
typedef JSBool
(* JSConvertOp)(JSContext *cx, JSObject *obj, JSType type, jsval *vp);
/*
* Delegate typeof to an object so it can cloak a primitive or another object.
*/
typedef JSType
(* JSTypeOfOp)(JSContext *cx, JSObject *obj);
/*
* Finalize obj, which the garbage collector has determined to be unreachable
* from other live objects or from GC roots. Obviously, finalizers must never
* store a reference to obj.
*/
typedef void
(* JSFinalizeOp)(JSContext *cx, JSObject *obj);
/*
* Used by JS_AddExternalStringFinalizer and JS_RemoveExternalStringFinalizer
* to extend and reduce the set of string types finalized by the GC.
*/
typedef void
(* JSStringFinalizeOp)(JSContext *cx, JSString *str);
/*
* JSClass.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. As for JSPropertyOp above, id
* is either a string or an int jsval.
*/
typedef JSBool
(* JSCheckAccessOp)(JSContext *cx, JSObject *obj, jsid id, JSAccessMode mode,
jsval *vp);
/*
* Encode or decode an object, given an XDR state record representing external
* data. See jsxdrapi.h.
*/
typedef JSBool
(* JSXDRObjectOp)(JSXDRState *xdr, JSObject **objp);
/*
* Check whether v is an instance of obj. Return false on error or exception,
* true on success with JS_TRUE in *bp if v is an instance of obj, JS_FALSE in
* *bp otherwise.
*/
typedef JSBool
(* JSHasInstanceOp)(JSContext *cx, JSObject *obj, const jsval *v, JSBool *bp);
/*
* Deprecated function type for JSClass.mark. All new code should define
* JSTraceOp instead to ensure the traversal of traceable things stored in
* the native structures.
*/
typedef uint32
(* JSMarkOp)(JSContext *cx, JSObject *obj, void *arg);
/*
* Function type for trace operation of the class called to enumerate all
* traceable things reachable from obj's private data structure. For each such
* thing, a trace implementation must call
*
* JS_CallTracer(trc, thing, kind);
*
* or one of its convenience macros as described in jsapi.h.
*
* JSTraceOp implementation can assume that no other threads mutates object
* state. It must not change state of the object or corresponding native
* structures. The only exception for this rule is the case when the embedding
* needs a tight integration with GC. In that case the embedding can check if
* the traversal is a part of the marking phase through calling
* JS_IsGCMarkingTracer and apply a special code like emptying caches or
* marking its native structures.
*
* To define the tracer for a JSClass, the implementation must add
* JSCLASS_MARK_IS_TRACE to class flags and use JS_CLASS_TRACE(method)
* macro below to convert JSTraceOp to JSMarkOp when initializing or
* assigning JSClass.mark field.
*/
typedef void
(* JSTraceOp)(JSTracer *trc, JSObject *obj);
#if defined __GNUC__ && __GNUC__ >= 4 && !defined __cplusplus
# define JS_CLASS_TRACE(method) \
(__builtin_types_compatible_p(JSTraceOp, __typeof(&(method))) \
? (JSMarkOp)(method) \
: js_WrongTypeForClassTracer)
extern JSMarkOp js_WrongTypeForClassTracer;
#else
# define JS_CLASS_TRACE(method) ((JSMarkOp)(method))
#endif
/*
* Tracer callback, called for each traceable thing directly referenced by a
* particular object or runtime structure. It is the callback responsibility
* to ensure the traversal of the full object graph via calling eventually
* JS_TraceChildren on the passed thing. In this case the callback must be
* prepared to deal with cycles in the traversal graph.
*
* kind argument is one of JSTRACE_OBJECT, JSTRACE_STRING or a tag denoting
* internal implementation-specific traversal kind. In the latter case the only
* operations on thing that the callback can do is to call JS_TraceChildren or
* DEBUG-only JS_PrintTraceThingInfo.
*/
typedef void
(* JSTraceCallback)(JSTracer *trc, void *thing, uint32 kind);
/*
* DEBUG only callback that JSTraceOp implementation can provide to return
* a string describing the reference traced with JS_CallTracer.
*/
typedef void
(* JSTraceNamePrinter)(JSTracer *trc, char *buf, size_t bufsize);
typedef JSBool
(* JSEqualityOp)(JSContext *cx, JSObject *obj, const jsval *v, JSBool *bp);
/*
* Typedef for native functions called by the JS VM.
*
* See jsapi.h, the JS_CALLEE, JS_THIS, etc. macros.
*/
typedef JSBool
(* JSNative)(JSContext *cx, uintN argc, jsval *vp);
/* Callbacks and their arguments. */
typedef enum JSContextOp {
JSCONTEXT_NEW,
JSCONTEXT_DESTROY
} JSContextOp;
/*
* The possible values for contextOp when the runtime calls the callback are:
* JSCONTEXT_NEW JS_NewContext successfully created a new JSContext
* instance. The callback can initialize the instance as
* required. If the callback returns false, the instance
* will be destroyed and JS_NewContext returns null. In
* this case the callback is not called again.
* JSCONTEXT_DESTROY One of JS_DestroyContext* methods is called. The
* callback may perform its own cleanup and must always
* return true.
* Any other value For future compatibility the callback must do nothing
* and return true in this case.
*/
typedef JSBool
(* JSContextCallback)(JSContext *cx, uintN contextOp);
#ifndef JS_THREADSAFE
typedef void
(* JSHeartbeatCallback)(JSRuntime *rt);
#endif
typedef enum JSGCStatus {
JSGC_BEGIN,
JSGC_END,
JSGC_MARK_END,
JSGC_FINALIZE_END
} JSGCStatus;
typedef JSBool
(* JSGCCallback)(JSContext *cx, JSGCStatus status);
/*
* Generic trace operation that calls JS_CallTracer on each traceable thing
* stored in data.
*/
typedef void
(* JSTraceDataOp)(JSTracer *trc, void *data);
typedef JSBool
(* JSOperationCallback)(JSContext *cx);
/*
* Deprecated form of JSOperationCallback.
*/
typedef JSBool
(* JSBranchCallback)(JSContext *cx, JSScript *script);
typedef void
(* JSErrorReporter)(JSContext *cx, const char *message, JSErrorReport *report);
/*
* Possible exception types. These types are part of a JSErrorFormatString
* structure. They define which error to throw in case of a runtime error.
* JSEXN_NONE marks an unthrowable error.
*/
typedef enum JSExnType {
JSEXN_NONE = -1,
JSEXN_ERR,
JSEXN_INTERNALERR,
JSEXN_EVALERR,
JSEXN_RANGEERR,
JSEXN_REFERENCEERR,
JSEXN_SYNTAXERR,
JSEXN_TYPEERR,
JSEXN_URIERR,
JSEXN_LIMIT
} JSExnType;
typedef struct JSErrorFormatString {
/* The error format string (UTF-8 if js_CStringsAreUTF8). */
const char *format;
/* The number of arguments to expand in the formatted error message. */
uint16 argCount;
/* One of the JSExnType constants above. */
int16 exnType;
} JSErrorFormatString;
typedef const JSErrorFormatString *
(* JSErrorCallback)(void *userRef, const char *locale,
const uintN errorNumber);
#ifdef va_start
#define JS_ARGUMENT_FORMATTER_DEFINED 1
typedef JSBool
(* JSArgumentFormatter)(JSContext *cx, const char *format, JSBool fromJS,
jsval **vpp, va_list *app);
#endif
typedef JSBool
(* JSLocaleToUpperCase)(JSContext *cx, JSString *src, jsval *rval);
typedef JSBool
(* JSLocaleToLowerCase)(JSContext *cx, JSString *src, jsval *rval);
typedef JSBool
(* JSLocaleCompare)(JSContext *cx, JSString *src1, JSString *src2,
jsval *rval);
typedef JSBool
(* JSLocaleToUnicode)(JSContext *cx, const char *src, jsval *rval);
/*
* Security protocol types.
*/
typedef struct JSPrincipals JSPrincipals;
/*
* XDR-encode or -decode a principals instance, based on whether xdr->mode is
* JSXDR_ENCODE, in which case *principalsp should be encoded; or JSXDR_DECODE,
* in which case implementations must return a held (via JSPRINCIPALS_HOLD),
* non-null *principalsp out parameter. Return true on success, false on any
* error, which the implementation must have reported.
*/
typedef JSBool
(* JSPrincipalsTranscoder)(JSXDRState *xdr, JSPrincipals **principalsp);
/*
* Return a weak reference to the principals associated with obj, possibly via
* the immutable parent chain leading from obj to a top-level container (e.g.,
* a window object in the DOM level 0). If there are no principals associated
* with obj, return null. Therefore null does not mean an error was reported;
* in no event should an error be reported or an exception be thrown by this
* callback's implementation.
*/
typedef JSPrincipals *
(* JSObjectPrincipalsFinder)(JSContext *cx, JSObject *obj);
/*
* Used to check if a CSP instance wants to disable eval() and friends.
* See js_CheckCSPPermitsJSAction() in jsobj.
*/
typedef JSBool
(* JSCSPEvalChecker)(JSContext *cx);
/*
* Callback used to ask the embedding for the cross compartment wrapper handler
* that implements the desired prolicy for this kind of object in the
* destination compartment.
*/
typedef JSObject *
(* JSWrapObjectCallback)(JSContext *cx, JSObject *obj, JSObject *proto, JSObject *parent,
uintN flags);
/*
* Callback used by the wrap hook to ask the embedding to prepare an object
* for wrapping in a context. This might include unwrapping other wrappers
* or even finding a more suitable object for the new compartment.
*/
typedef JSObject *
(* JSPreWrapCallback)(JSContext *cx, JSObject *scope, JSObject *obj, uintN flags);
typedef enum {
JSCOMPARTMENT_NEW, /* XXX Does it make sense to have a NEW? */
JSCOMPARTMENT_DESTROY
} JSCompartmentOp;
typedef JSBool
(* JSCompartmentCallback)(JSContext *cx, JSCompartment *compartment, uintN compartmentOp);
/*
* Read structured data from the reader r. This hook is used to read a value
* previously serialized by a call to the WriteStructuredCloneOp hook.
*
* tag and data are the pair of uint32 values from the header. The callback may
* use the JS_Read* APIs to read any other relevant parts of the object from
* the reader r. closure is any value passed to the JS_ReadStructuredClone
* function. Return the new object on success, NULL on error/exception.
*/
typedef JSObject *(*ReadStructuredCloneOp)(JSContext *cx, JSStructuredCloneReader *r,
uint32 tag, uint32 data, void *closure);
/*
* Structured data serialization hook. The engine can write primitive values,
* Objects, Arrays, Dates, RegExps, TypedArrays, and ArrayBuffers. Any other
* type of object requires application support. This callback must first use
* the JS_WriteUint32Pair API to write an object header, passing a value
* greater than JS_SCTAG_USER to the tag parameter. Then it can use the
* JS_Write* APIs to write any other relevant parts of the value v to the
* writer w. closure is any value passed to the JS_WriteStructuredCLone function.
*
* Return true on success, false on error/exception.
*/
typedef JSBool (*WriteStructuredCloneOp)(JSContext *cx, JSStructuredCloneWriter *w,
JSObject *obj, void *closure);
/*
* This is called when JS_WriteStructuredClone finds that the object to be
* written is recursive. To follow HTML5, the application must throw a
* DATA_CLONE_ERR DOMException. errorid is always JS_SCERR_RECURSION.
*/
typedef void (*StructuredCloneErrorOp)(JSContext *cx, uint32 errorid);
JS_END_EXTERN_C
#endif /* jspubtd_h___ */