/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- * vim: set ts=8 sw=4 et tw=78: * * ***** 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 jsapi_h___ #define jsapi_h___ /* * JavaScript API. */ #include #include #include "js-config.h" #include "jspubtd.h" #include "jsutil.h" JS_BEGIN_EXTERN_C /* Well-known JS values, initialized on startup. */ extern jsval JSVAL_NULL; extern jsval JSVAL_ZERO; extern jsval JSVAL_ONE; extern jsval JSVAL_FALSE; extern jsval JSVAL_TRUE; extern jsval JSVAL_VOID; /* * Exact value equality, corresponding to == on old word-sized jsvals. * * To have simple byte-equality we would need the keep all sizeof(Data) bytes * of data in a well-defined state for every type. On 32-bit systems, this * isn't true for non-doubles. On 64-bit systems, this isn't true for undefined * and booleans. * * N.B. it is much faster to use specific queries like JSVAL_IS_NULL than * EQUAL_TYPE_AND_PAYLOAD(v, JSVAL_NULL). */ inline JSBool EQUAL_TYPE_AND_PAYLOAD(const jsval *lval, const jsval *rval) { JSValueMaskType lmask = lval->mask, rmask = rval->mask; jsval_data ldata = lval->data, rdata = rval->data; JSBool sameType = lmask == rmask; JSBool noPayload = (lmask & (JSVAL_UNDEFINED_MASK | JSVAL_MAGIC_MASK)) != 0; JSBool firstWordEqual = ldata.bits.first == rdata.bits.first; JSBool secondWordEqual = ldata.bits.second == rdata.bits.second; /* N.B. JSVAL_NULL_MASK == 0. */ #if JS_BITS_PER_WORD == 32 JSBool noSecondWord = (lmask == 0) | ((lmask & (JSVAL_INT32_MASK | JSVAL_BOOLEAN_MASK | JSVAL_STRING_MASK | JSVAL_NONFUNOBJ_MASK | JSVAL_FUNOBJ_MASK)) != 0); #elif JS_BITS_PER_WORD == 64 JSBool noSecondWord = (lmask & JSVAL_INT32_MASK | JSVAL_BOOLEAN_MASK) #else # error "Unsupported word size" #endif return sameType & (noPayload | (firstWordEqual & (secondWordEqual | noSecondWord))); } /* Predicates for type testing. */ static JS_ALWAYS_INLINE JSBool JSVAL_IS_NULL(jsval v) { return v.mask == JSVAL_NULL_MASK; } static JS_ALWAYS_INLINE JSBool JSVAL_IS_VOID(jsval v) { return v.mask == JSVAL_UNDEFINED_MASK; } static JS_ALWAYS_INLINE JSBool JSVAL_IS_INT(jsval v) { return v.mask == JSVAL_INT32_MASK; } static JS_ALWAYS_INLINE jsint JSVAL_TO_INT(jsval v) { JS_ASSERT(JSVAL_IS_INT(v)); return v.data.i32; } static JS_ALWAYS_INLINE JSBool JSVAL_IS_ZERO(jsval v) { return JSVAL_IS_INT(v) && JSVAL_TO_INT(v) == 0; } #define JSVAL_INT_BITS 32 #define JSVAL_INT_MIN ((jsint)0x80000000) #define JSVAL_INT_MAX ((jsint)0x7fffffff) static JS_ALWAYS_INLINE bool INT_FITS_IN_JSVAL(jsint i) { return JS_TRUE; } static JS_ALWAYS_INLINE jsval INT_TO_JSVAL(int32 i) { jsval v; v.mask = JSVAL_INT32_MASK; v.data.i32 = i; return v; } static JS_ALWAYS_INLINE JSBool JSVAL_IS_DOUBLE(jsval v) { return v.mask == JSVAL_DOUBLE_MASK; } static JS_ALWAYS_INLINE jsdouble JSVAL_TO_DOUBLE(jsval v) { JS_ASSERT(JSVAL_IS_DOUBLE(v)); return v.data.dbl; } static JS_ALWAYS_INLINE jsval DOUBLE_TO_JSVAL(jsdouble d) { jsval v; v.mask = JSVAL_DOUBLE_MASK; v.data.dbl = d; return v; } static JS_ALWAYS_INLINE JSBool JSVAL_IS_NUMBER(jsval v) { return v.mask & (JSVAL_INT32_MASK | JSVAL_DOUBLE_MASK); } static JS_ALWAYS_INLINE JSBool JSVAL_IS_STRING(jsval v) { return v.mask == JSVAL_STRING_MASK; } static JS_ALWAYS_INLINE JSString * JSVAL_TO_STRING(jsval v) { JS_ASSERT(JSVAL_IS_STRING(v)); return v.data.str; } static JS_ALWAYS_INLINE jsval STRING_TO_JSVAL(JSString *str) { jsval v; v.mask = JSVAL_STRING_MASK; v.data.str = str; return v; } /* * N.B. These functions use the older meaning of "object" as "object or null". * This is not a problem if code only works with jsvals or only works with * js::Value, but if both uses are mixed, it is important not to get confused * by the two meanings. For example, JSVAL_IS_OBJECT(v) does not imply * v.isObject(). */ static JS_ALWAYS_INLINE JSBool JSVAL_IS_OBJECT(jsval v) { return !(v.mask & ~(JSVAL_FUNOBJ_MASK | JSVAL_NONFUNOBJ_MASK)); } static JS_ALWAYS_INLINE JSObject * JSVAL_TO_OBJECT(jsval v) { JS_ASSERT(JSVAL_IS_OBJECT(v)); return v.data.obj; } static JS_ALWAYS_INLINE jsval OBJECT_TO_JSVAL(JSObject *obj) { extern JS_PUBLIC_API(JSBool) JS_ObjectIsFunction(JSContext *cx, JSObject *obj); jsval v; if (!obj) v.mask = JSVAL_NULL_MASK; else if (JS_ObjectIsFunction(NULL, obj)) v.mask = JSVAL_FUNOBJ_MASK; else v.mask = JSVAL_NONFUNOBJ_MASK; v.data.obj = obj; return v; } static JS_ALWAYS_INLINE JSBool JSVAL_IS_BOOLEAN(jsval v) { return v.mask == JSVAL_BOOLEAN_MASK; } static JS_ALWAYS_INLINE JSBool JSVAL_TO_BOOLEAN(jsval v) { JS_ASSERT(JSVAL_IS_BOOLEAN(v)); return v.data.boo; } static JS_ALWAYS_INLINE jsval BOOLEAN_TO_JSVAL(JSBool b) { jsval v; v.data.boo = b; v.mask = JSVAL_BOOLEAN_MASK; return v; } static JS_ALWAYS_INLINE JSBool JSVAL_IS_TRUE(jsval v) { return v.mask == JSVAL_BOOLEAN_MASK && v.data.boo == JS_TRUE; } static JS_ALWAYS_INLINE JSBool JSVAL_IS_FALSE(jsval v) { return v.mask == JSVAL_BOOLEAN_MASK && v.data.boo == JS_FALSE; } static JS_ALWAYS_INLINE JSBool JSVAL_IS_PRIMITIVE(jsval v) { return !(v.mask & (JSVAL_NONFUNOBJ_MASK | JSVAL_FUNOBJ_MASK)); } static JS_ALWAYS_INLINE JSBool JSVAL_IS_GCTHING(jsval v) { return v.mask & (JSVAL_STRING_MASK | JSVAL_NONFUNOBJ_MASK | JSVAL_FUNOBJ_MASK); } static JS_ALWAYS_INLINE void * JSVAL_TO_GCTHING(jsval v) { JS_ASSERT(JSVAL_IS_GCTHING(v)); return v.data.ptr; } static JS_ALWAYS_INLINE jsval PRIVATE_TO_JSVAL(void *ptr) { jsval v; v.mask = JSVAL_INT32_MASK; v.data.ptr = ptr; return v; } static JS_ALWAYS_INLINE void * JSVAL_TO_PRIVATE(jsval v) { JS_ASSERT(v.mask == JSVAL_INT32_MASK); return v.data.ptr; } /* Lock and unlock the GC thing held by a jsval. */ #define JSVAL_LOCK(cx,v) (JSVAL_IS_GCTHING(v) \ ? JS_LockGCThing(cx, JSVAL_TO_GCTHING(v)) \ : JS_TRUE) #define JSVAL_UNLOCK(cx,v) (JSVAL_IS_GCTHING(v) \ ? JS_UnlockGCThing(cx, JSVAL_TO_GCTHING(v)) \ : JS_TRUE) /* Property attributes, set in JSPropertySpec and passed to API functions. */ #define JSPROP_ENUMERATE 0x01 /* property is visible to for/in loop */ #define JSPROP_READONLY 0x02 /* not settable: assignment is no-op */ #define JSPROP_PERMANENT 0x04 /* property cannot be deleted */ #define JSPROP_GETTER 0x10 /* property holds getter function */ #define JSPROP_SETTER 0x20 /* property holds setter function */ #define JSPROP_SHARED 0x40 /* don't allocate a value slot for this property; don't copy the property on set of the same-named property in an object that delegates to a prototype containing this property */ #define JSPROP_INDEX 0x80 /* name is actually (jsint) index */ /* Function flags, set in JSFunctionSpec and passed to JS_NewFunction etc. */ #define JSFUN_LAMBDA 0x08 /* expressed, not declared, function */ #define JSFUN_GETTER JSPROP_GETTER #define JSFUN_SETTER JSPROP_SETTER #define JSFUN_BOUND_METHOD 0x40 /* bind this to fun->object's parent */ #define JSFUN_HEAVYWEIGHT 0x80 /* activation requires a Call object */ #define JSFUN_DISJOINT_FLAGS(f) ((f) & 0x0f) #define JSFUN_GSFLAGS(f) ((f) & (JSFUN_GETTER | JSFUN_SETTER)) #define JSFUN_GETTER_TEST(f) ((f) & JSFUN_GETTER) #define JSFUN_SETTER_TEST(f) ((f) & JSFUN_SETTER) #define JSFUN_BOUND_METHOD_TEST(f) ((f) & JSFUN_BOUND_METHOD) #define JSFUN_HEAVYWEIGHT_TEST(f) ((f) & JSFUN_HEAVYWEIGHT) #define JSFUN_GSFLAG2ATTR(f) JSFUN_GSFLAGS(f) #define JSFUN_THISP_FLAGS(f) (f) #define JSFUN_THISP_TEST(f,t) ((f) & t) #define JSFUN_THISP_STRING 0x0100 /* |this| may be a primitive string */ #define JSFUN_THISP_NUMBER 0x0200 /* |this| may be a primitive number */ #define JSFUN_THISP_BOOLEAN 0x0400 /* |this| may be a primitive boolean */ #define JSFUN_THISP_PRIMITIVE 0x0700 /* |this| may be any primitive value */ #define JSFUN_FAST_NATIVE 0x0800 /* JSFastNative needs no JSStackFrame */ #define JSFUN_FLAGS_MASK 0x0ff8 /* overlay JSFUN_* attributes -- bits 12-15 are used internally to flag interpreted functions */ #define JSFUN_STUB_GSOPS 0x1000 /* use JS_PropertyStub getter/setter instead of defaulting to class gsops for property holding function */ /* * Re-use JSFUN_LAMBDA, which applies only to scripted functions, for use in * JSFunctionSpec arrays that specify generic native prototype methods, i.e., * methods of a class prototype that are exposed as static methods taking an * extra leading argument: the generic |this| parameter. * * If you set this flag in a JSFunctionSpec struct's flags initializer, then * that struct must live at least as long as the native static method object * created due to this flag by JS_DefineFunctions or JS_InitClass. Typically * JSFunctionSpec structs are allocated in static arrays. */ #define JSFUN_GENERIC_NATIVE JSFUN_LAMBDA /* * Microseconds since the epoch, midnight, January 1, 1970 UTC. See the * comment in jstypes.h regarding safe int64 usage. */ extern JS_PUBLIC_API(int64) JS_Now(void); /* Don't want to export data, so provide accessors for non-inline jsvals. */ extern JS_PUBLIC_API(jsval) JS_GetNaNValue(JSContext *cx); extern JS_PUBLIC_API(jsval) JS_GetNegativeInfinityValue(JSContext *cx); extern JS_PUBLIC_API(jsval) JS_GetPositiveInfinityValue(JSContext *cx); extern JS_PUBLIC_API(jsval) JS_GetEmptyStringValue(JSContext *cx); /* * Format is a string of the following characters (spaces are insignificant), * specifying the tabulated type conversions: * * b JSBool Boolean * c uint16/jschar ECMA uint16, Unicode char * i int32 ECMA int32 * u uint32 ECMA uint32 * j int32 Rounded int32 (coordinate) * d jsdouble IEEE double * I jsdouble Integral IEEE double * s char * C string * S JSString * Unicode string, accessed by a JSString pointer * W jschar * Unicode character vector, 0-terminated (W for wide) * o JSObject * Object reference * f JSFunction * Function private * v jsval Argument value (no conversion) * * N/A Skip this argument (no vararg) * / N/A End of required arguments * * The variable argument list after format must consist of &b, &c, &s, e.g., * where those variables have the types given above. For the pointer types * char *, JSString *, and JSObject *, the pointed-at memory returned belongs * to the JS runtime, not to the calling native code. The runtime promises * to keep this memory valid so long as argv refers to allocated stack space * (so long as the native function is active). * * Fewer arguments than format specifies may be passed only if there is a / * in format after the last required argument specifier and argc is at least * the number of required arguments. More arguments than format specifies * may be passed without error; it is up to the caller to deal with trailing * unconverted arguments. */ extern JS_PUBLIC_API(JSBool) JS_ConvertArguments(JSContext *cx, uintN argc, jsval *argv, const char *format, ...); #ifdef va_start extern JS_PUBLIC_API(JSBool) JS_ConvertArgumentsVA(JSContext *cx, uintN argc, jsval *argv, const char *format, va_list ap); #endif #ifdef JS_ARGUMENT_FORMATTER_DEFINED /* * Add and remove a format string handler for JS_{Convert,Push}Arguments{,VA}. * The handler function has this signature (see jspubtd.h): * * JSBool MyArgumentFormatter(JSContext *cx, const char *format, * JSBool fromJS, jsval **vpp, va_list *app); * * It should return true on success, and return false after reporting an error * or detecting an already-reported error. * * For a given format string, for example "AA", the formatter is called from * JS_ConvertArgumentsVA like so: * * formatter(cx, "AA...", JS_TRUE, &sp, &ap); * * sp points into the arguments array on the JS stack, while ap points into * the stdarg.h va_list on the C stack. The JS_TRUE passed for fromJS tells * the formatter to convert zero or more jsvals at sp to zero or more C values * accessed via pointers-to-values at ap, updating both sp (via *vpp) and ap * (via *app) to point past the converted arguments and their result pointers * on the C stack. * * When called from JS_PushArgumentsVA, the formatter is invoked thus: * * formatter(cx, "AA...", JS_FALSE, &sp, &ap); * * where JS_FALSE for fromJS means to wrap the C values at ap according to the * format specifier and store them at sp, updating ap and sp appropriately. * * The "..." after "AA" is the rest of the format string that was passed into * JS_{Convert,Push}Arguments{,VA}. The actual format trailing substring used * in each Convert or PushArguments call is passed to the formatter, so that * one such function may implement several formats, in order to share code. * * Remove just forgets about any handler associated with format. Add does not * copy format, it points at the string storage allocated by the caller, which * is typically a string constant. If format is in dynamic storage, it is up * to the caller to keep the string alive until Remove is called. */ extern JS_PUBLIC_API(JSBool) JS_AddArgumentFormatter(JSContext *cx, const char *format, JSArgumentFormatter formatter); extern JS_PUBLIC_API(void) JS_RemoveArgumentFormatter(JSContext *cx, const char *format); #endif /* JS_ARGUMENT_FORMATTER_DEFINED */ extern JS_PUBLIC_API(JSBool) JS_ConvertValue(JSContext *cx, jsval v, JSType type, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_ValueToObject(JSContext *cx, jsval v, JSObject **objp); extern JS_PUBLIC_API(JSFunction *) JS_ValueToFunction(JSContext *cx, jsval v); extern JS_PUBLIC_API(JSFunction *) JS_ValueToConstructor(JSContext *cx, jsval v); extern JS_PUBLIC_API(JSString *) JS_ValueToString(JSContext *cx, jsval v); extern JS_PUBLIC_API(JSString *) JS_ValueToSource(JSContext *cx, jsval v); extern JS_PUBLIC_API(JSBool) JS_ValueToNumber(JSContext *cx, jsval v, jsdouble *dp); extern JS_PUBLIC_API(JSBool) JS_DoubleIsInt32(jsdouble d, jsint *ip); /* * Convert a value to a number, then to an int32, according to the ECMA rules * for ToInt32. */ extern JS_PUBLIC_API(JSBool) JS_ValueToECMAInt32(JSContext *cx, jsval v, int32 *ip); /* * Convert a value to a number, then to a uint32, according to the ECMA rules * for ToUint32. */ extern JS_PUBLIC_API(JSBool) JS_ValueToECMAUint32(JSContext *cx, jsval v, uint32 *ip); /* * Convert a value to a number, then to an int32 if it fits by rounding to * nearest; but failing with an error report if the double is out of range * or unordered. */ extern JS_PUBLIC_API(JSBool) JS_ValueToInt32(JSContext *cx, jsval v, int32 *ip); /* * ECMA ToUint16, for mapping a jsval to a Unicode point. */ extern JS_PUBLIC_API(JSBool) JS_ValueToUint16(JSContext *cx, jsval v, uint16 *ip); extern JS_PUBLIC_API(JSBool) JS_ValueToBoolean(JSContext *cx, jsval v, JSBool *bp); extern JS_PUBLIC_API(JSType) JS_TypeOfValue(JSContext *cx, jsval v); extern JS_PUBLIC_API(const char *) JS_GetTypeName(JSContext *cx, JSType type); extern JS_PUBLIC_API(JSBool) JS_StrictlyEqual(JSContext *cx, jsval v1, jsval v2); extern JS_PUBLIC_API(JSBool) JS_SameValue(JSContext *cx, jsval v1, jsval v2); /************************************************************************/ /* * Initialization, locking, contexts, and memory allocation. * * It is important that the first runtime and first context be created in a * single-threaded fashion, otherwise the behavior of the library is undefined. * See: http://developer.mozilla.org/en/docs/Category:JSAPI_Reference */ #define JS_NewRuntime JS_Init #define JS_DestroyRuntime JS_Finish #define JS_LockRuntime JS_Lock #define JS_UnlockRuntime JS_Unlock extern JS_PUBLIC_API(JSRuntime *) JS_NewRuntime(uint32 maxbytes); extern JS_PUBLIC_API(void) JS_CommenceRuntimeShutDown(JSRuntime *rt); extern JS_PUBLIC_API(void) JS_DestroyRuntime(JSRuntime *rt); extern JS_PUBLIC_API(void) JS_ShutDown(void); JS_PUBLIC_API(void *) JS_GetRuntimePrivate(JSRuntime *rt); JS_PUBLIC_API(void) JS_SetRuntimePrivate(JSRuntime *rt, void *data); extern JS_PUBLIC_API(void) JS_BeginRequest(JSContext *cx); extern JS_PUBLIC_API(void) JS_EndRequest(JSContext *cx); /* Yield to pending GC operations, regardless of request depth */ extern JS_PUBLIC_API(void) JS_YieldRequest(JSContext *cx); extern JS_PUBLIC_API(jsrefcount) JS_SuspendRequest(JSContext *cx); extern JS_PUBLIC_API(void) JS_ResumeRequest(JSContext *cx, jsrefcount saveDepth); extern JS_PUBLIC_API(void) JS_TransferRequest(JSContext *cx, JSContext *another); #ifdef __cplusplus JS_END_EXTERN_C class JSAutoRequest { public: JSAutoRequest(JSContext *cx JS_GUARD_OBJECT_NOTIFIER_PARAM) : mContext(cx), mSaveDepth(0) { JS_GUARD_OBJECT_NOTIFIER_INIT; JS_BeginRequest(mContext); } ~JSAutoRequest() { JS_EndRequest(mContext); } void suspend() { mSaveDepth = JS_SuspendRequest(mContext); } void resume() { JS_ResumeRequest(mContext, mSaveDepth); } protected: JSContext *mContext; jsrefcount mSaveDepth; JS_DECL_USE_GUARD_OBJECT_NOTIFIER #if 0 private: static void *operator new(size_t) CPP_THROW_NEW { return 0; }; static void operator delete(void *, size_t) { }; #endif }; class JSAutoSuspendRequest { public: JSAutoSuspendRequest(JSContext *cx JS_GUARD_OBJECT_NOTIFIER_PARAM) : mContext(cx), mSaveDepth(0) { JS_GUARD_OBJECT_NOTIFIER_INIT; if (mContext) { mSaveDepth = JS_SuspendRequest(mContext); } } ~JSAutoSuspendRequest() { resume(); } void resume() { if (mContext) { JS_ResumeRequest(mContext, mSaveDepth); mContext = 0; } } protected: JSContext *mContext; jsrefcount mSaveDepth; JS_DECL_USE_GUARD_OBJECT_NOTIFIER #if 0 private: static void *operator new(size_t) CPP_THROW_NEW { return 0; }; static void operator delete(void *, size_t) { }; #endif }; class JSAutoTransferRequest { public: JSAutoTransferRequest(JSContext* cx1, JSContext* cx2) : cx1(cx1), cx2(cx2) { if(cx1 != cx2) JS_TransferRequest(cx1, cx2); } ~JSAutoTransferRequest() { if(cx1 != cx2) JS_TransferRequest(cx2, cx1); } private: JSContext* const cx1; JSContext* const cx2; /* Not copyable. */ JSAutoTransferRequest(JSAutoTransferRequest &); void operator =(JSAutoTransferRequest&); }; JS_BEGIN_EXTERN_C #endif extern JS_PUBLIC_API(void) JS_Lock(JSRuntime *rt); extern JS_PUBLIC_API(void) JS_Unlock(JSRuntime *rt); extern JS_PUBLIC_API(JSContextCallback) JS_SetContextCallback(JSRuntime *rt, JSContextCallback cxCallback); extern JS_PUBLIC_API(JSContext *) JS_NewContext(JSRuntime *rt, size_t stackChunkSize); extern JS_PUBLIC_API(void) JS_DestroyContext(JSContext *cx); extern JS_PUBLIC_API(void) JS_DestroyContextNoGC(JSContext *cx); extern JS_PUBLIC_API(void) JS_DestroyContextMaybeGC(JSContext *cx); extern JS_PUBLIC_API(void *) JS_GetContextPrivate(JSContext *cx); extern JS_PUBLIC_API(void) JS_SetContextPrivate(JSContext *cx, void *data); extern JS_PUBLIC_API(JSRuntime *) JS_GetRuntime(JSContext *cx); extern JS_PUBLIC_API(JSContext *) JS_ContextIterator(JSRuntime *rt, JSContext **iterp); extern JS_PUBLIC_API(JSVersion) JS_GetVersion(JSContext *cx); extern JS_PUBLIC_API(JSVersion) JS_SetVersion(JSContext *cx, JSVersion version); extern JS_PUBLIC_API(const char *) JS_VersionToString(JSVersion version); extern JS_PUBLIC_API(JSVersion) JS_StringToVersion(const char *string); /* * JS options are orthogonal to version, and may be freely composed with one * another as well as with version. * * JSOPTION_VAROBJFIX is recommended -- see the comments associated with the * prototypes for JS_ExecuteScript, JS_EvaluateScript, etc. */ #define JSOPTION_STRICT JS_BIT(0) /* warn on dubious practice */ #define JSOPTION_WERROR JS_BIT(1) /* convert warning to error */ #define JSOPTION_VAROBJFIX JS_BIT(2) /* make JS_EvaluateScript use the last object on its 'obj' param's scope chain as the ECMA 'variables object' */ #define JSOPTION_PRIVATE_IS_NSISUPPORTS \ JS_BIT(3) /* context private data points to an nsISupports subclass */ #define JSOPTION_COMPILE_N_GO JS_BIT(4) /* caller of JS_Compile*Script promises to execute compiled script once only; enables compile-time scope chain resolution of consts. */ #define JSOPTION_ATLINE JS_BIT(5) /* //@line number ["filename"] option supported for the XUL preprocessor and kindred beasts. */ #define JSOPTION_XML JS_BIT(6) /* EMCAScript for XML support: parse as a token, not backward compatible with the comment-hiding hack used in HTML script tags. */ #define JSOPTION_DONT_REPORT_UNCAUGHT \ JS_BIT(8) /* When returning from the outermost API call, prevent uncaught exceptions from being converted to error reports */ #define JSOPTION_RELIMIT JS_BIT(9) /* Throw exception on any regular expression which backtracks more than n^3 times, where n is length of the input string */ #define JSOPTION_ANONFUNFIX JS_BIT(10) /* Disallow function () {} in statement context per ECMA-262 Edition 3. */ #define JSOPTION_JIT JS_BIT(11) /* Enable JIT compilation. */ #define JSOPTION_NO_SCRIPT_RVAL JS_BIT(12) /* A promise to the compiler that a null rval out-param will be passed to each call to JS_ExecuteScript. */ #define JSOPTION_UNROOTED_GLOBAL JS_BIT(13) /* The GC will not root the contexts' global objects (see JS_GetGlobalObject), leaving that up to the embedding. */ extern JS_PUBLIC_API(uint32) JS_GetOptions(JSContext *cx); extern JS_PUBLIC_API(uint32) JS_SetOptions(JSContext *cx, uint32 options); extern JS_PUBLIC_API(uint32) JS_ToggleOptions(JSContext *cx, uint32 options); extern JS_PUBLIC_API(const char *) JS_GetImplementationVersion(void); extern JS_PUBLIC_API(JSObject *) JS_GetGlobalObject(JSContext *cx); extern JS_PUBLIC_API(void) JS_SetGlobalObject(JSContext *cx, JSObject *obj); /* * Initialize standard JS class constructors, prototypes, and any top-level * functions and constants associated with the standard classes (e.g. isNaN * for Number). * * NB: This sets cx's global object to obj if it was null. */ extern JS_PUBLIC_API(JSBool) JS_InitStandardClasses(JSContext *cx, JSObject *obj); /* * Resolve id, which must contain either a string or an int, to a standard * class name in obj if possible, defining the class's constructor and/or * prototype and storing true in *resolved. If id does not name a standard * class or a top-level property induced by initializing a standard class, * store false in *resolved and just return true. Return false on error, * as usual for JSBool result-typed API entry points. * * This API can be called directly from a global object class's resolve op, * to define standard classes lazily. The class's enumerate op should call * JS_EnumerateStandardClasses(cx, obj), to define eagerly during for..in * loops any classes not yet resolved lazily. */ extern JS_PUBLIC_API(JSBool) JS_ResolveStandardClass(JSContext *cx, JSObject *obj, jsid id, JSBool *resolved); extern JS_PUBLIC_API(JSBool) JS_EnumerateStandardClasses(JSContext *cx, JSObject *obj); /* * Enumerate any already-resolved standard class ids into ida, or into a new * JSIdArray if ida is null. Return the augmented array on success, null on * failure with ida (if it was non-null on entry) destroyed. */ extern JS_PUBLIC_API(JSIdArray *) JS_EnumerateResolvedStandardClasses(JSContext *cx, JSObject *obj, JSIdArray *ida); extern JS_PUBLIC_API(JSBool) JS_GetClassObject(JSContext *cx, JSObject *obj, JSProtoKey key, JSObject **objp); extern JS_PUBLIC_API(JSObject *) JS_GetScopeChain(JSContext *cx); extern JS_PUBLIC_API(JSObject *) JS_GetGlobalForObject(JSContext *cx, JSObject *obj); #ifdef JS_HAS_CTYPES /* * Initialize the 'ctypes' object on a global variable 'obj'. The 'ctypes' * object will be sealed. */ extern JS_PUBLIC_API(JSBool) JS_InitCTypesClass(JSContext *cx, JSObject *global); #endif /* * Macros to hide interpreter stack layout details from a JSFastNative using * its jsval *vp parameter. The stack layout underlying invocation can't change * without breaking source and binary compatibility (argv[-2] is well-known to * be the callee jsval, and argv[-1] is as well known to be |this|). * * Note well: However, argv[-1] may be JSVAL_NULL where with slow natives it * is the global object, so embeddings implementing fast natives *must* call * JS_THIS or JS_THIS_OBJECT and test for failure indicated by a null return, * which should propagate as a false return from native functions and hooks. * * To reduce boilerplace checks, JS_InstanceOf and JS_GetInstancePrivate now * handle a null obj parameter by returning false (throwing a TypeError if * given non-null argv), so most native functions that type-check their |this| * parameter need not add null checking. * * NB: there is an anti-dependency between JS_CALLEE and JS_SET_RVAL: native * methods that may inspect their callee must defer setting their return value * until after any such possible inspection. Otherwise the return value will be * inspected instead of the callee function object. * * WARNING: These are not (yet) mandatory macros, but new code outside of the * engine should use them. In the Mozilla 2.0 milestone their definitions may * change incompatibly. */ #define JS_CALLEE(cx,vp) ((vp)[0]) #define JS_ARGV_CALLEE(argv) ((argv)[-2]) #define JS_THIS(cx,vp) JS_ComputeThis(cx, vp) #define JS_THIS_OBJECT(cx,vp) (JSVAL_TO_OBJECT(JS_THIS(cx,vp))) #define JS_ARGV(cx,vp) ((vp) + 2) #define JS_RVAL(cx,vp) (*(vp)) #define JS_SET_RVAL(cx,vp,v) (*(vp) = (v)) extern JS_PUBLIC_API(jsval) JS_ComputeThis(JSContext *cx, jsval *vp); extern JS_PUBLIC_API(void *) JS_malloc(JSContext *cx, size_t nbytes); extern JS_PUBLIC_API(void *) JS_realloc(JSContext *cx, void *p, size_t nbytes); extern JS_PUBLIC_API(void) JS_free(JSContext *cx, void *p); extern JS_PUBLIC_API(void) JS_updateMallocCounter(JSContext *cx, size_t nbytes); extern JS_PUBLIC_API(char *) JS_strdup(JSContext *cx, const char *s); /* * A GC root is a pointer to a jsval, JSObject *, or JSString * that itself * points into the GC heap. JS_AddValueRoot takes pointers to jsvals and * JS_AddGCThingRoot takes pointers to a JSObject * or JString *. * * Note that, since JS_Add*Root stores the address of a (jsval, JSString *, or * JSObject *) variable, that variable must be alive until JS_RemoveRoot is * called to remove that variable. For example, after writing: * * jsval v; * JS_AddNamedRootedValue(cx, &v, "name"); * * the caller must perform * * JS_RemoveRootedValue(cx, &v); * * before 'v' goes out of scope. * * Also, use JS_AddNamedRoot(cx, &structPtr->memberObj, "structPtr->memberObj") * in preference to JS_AddRoot(cx, &structPtr->memberObj), in order to identify * roots by their source callsites. This way, you can find the callsite while * debugging if you should fail to do JS_RemoveRoot(cx, &structPtr->memberObj) * before freeing structPtr's memory. */ extern JS_PUBLIC_API(JSBool) JS_AddValueRoot(JSContext *cx, js::Value *vp); extern JS_PUBLIC_API(JSBool) JS_AddStringRoot(JSContext *cx, JSString **rp); extern JS_PUBLIC_API(JSBool) JS_AddObjectRoot(JSContext *cx, JSObject **rp); #ifdef NAME_ALL_GC_ROOTS #define JS_DEFINE_TO_TOKEN(def) #def #define JS_DEFINE_TO_STRING(def) JS_DEFINE_TO_TOKEN(def) #define JS_AddValueRoot(cx,vp) JS_AddNamedValueRoot((cx), (vp), (__FILE__ ":" JS_TOKEN_TO_STRING(__LINE__)) #define JS_AddStringRoot(cx,rp) JS_AddNamedStringRoot((cx), (rp), (__FILE__ ":" JS_TOKEN_TO_STRING(__LINE__)) #define JS_AddObjectRoot(cx,rp) JS_AddNamedObjectRoot((cx), (rp), (__FILE__ ":" JS_TOKEN_TO_STRING(__LINE__)) #endif extern JS_PUBLIC_API(JSBool) JS_AddNamedValueRoot(JSContext *cx, js::Value *vp, const char *name); extern JS_PUBLIC_API(JSBool) JS_AddNamedStringRoot(JSContext *cx, JSString **rp, const char *name); extern JS_PUBLIC_API(JSBool) JS_AddNamedObjectRoot(JSContext *cx, JSObject **rp, const char *name); extern JS_PUBLIC_API(JSBool) JS_AddNamedValueRootRT(JSRuntime *rt, js::Value *vp, const char *name); extern JS_PUBLIC_API(JSBool) JS_AddNamedStringRootRT(JSRuntime *rt, JSString **rp, const char *name); extern JS_PUBLIC_API(JSBool) JS_AddNamedObjectRootRT(JSRuntime *rt, JSObject **rp, const char *name); extern JS_PUBLIC_API(JSBool) JS_RemoveValueRoot(JSContext *cx, js::Value *vp); extern JS_PUBLIC_API(JSBool) JS_RemoveStringRoot(JSContext *cx, JSString **rp); extern JS_PUBLIC_API(JSBool) JS_RemoveObjectRoot(JSContext *cx, JSObject **rp); extern JS_PUBLIC_API(JSBool) JS_RemoveValueRootRT(JSRuntime *rt, js::Value *vp); extern JS_PUBLIC_API(JSBool) JS_RemoveStringRootRT(JSRuntime *rt, JSString **rp); extern JS_PUBLIC_API(JSBool) JS_RemoveObjectRootRT(JSRuntime *rt, JSObject **rp); /* * The last GC thing of each type (object, string, double, external string * types) created on a given context is kept alive until another thing of the * same type is created, using a newborn root in the context. These newborn * roots help native code protect newly-created GC-things from GC invocations * activated before those things can be rooted using local or global roots. * * However, the newborn roots can also entrain great gobs of garbage, so the * JS_GC entry point clears them for the context on which GC is being forced. * Embeddings may need to do likewise for all contexts. * * See the scoped local root API immediately below for a better way to manage * newborns in cases where native hooks (functions, getters, setters, etc.) * create many GC-things, potentially without connecting them to predefined * local roots such as *rval or argv[i] in an active native function. Using * JS_EnterLocalRootScope disables updating of the context's per-gc-thing-type * newborn roots, until control flow unwinds and leaves the outermost nesting * local root scope. */ extern JS_PUBLIC_API(void) JS_ClearNewbornRoots(JSContext *cx); /* * Scoped local root management allows native functions, getter/setters, etc. * to avoid worrying about the newborn root pigeon-holes, overloading local * roots allocated in argv and *rval, or ending up having to call JS_Add*Root * and JS_RemoveRoot to manage global roots temporarily. * * Instead, calling JS_EnterLocalRootScope and JS_LeaveLocalRootScope around * the body of the native hook causes the engine to allocate a local root for * each newborn created in between the two API calls, using a local root stack * associated with cx. For example: * * JSBool * my_GetProperty(JSContext *cx, JSObject *obj, jsid id, jsval *vp) * { * JSBool ok; * * if (!JS_EnterLocalRootScope(cx)) * return JS_FALSE; * ok = my_GetPropertyBody(cx, obj, id, vp); * JS_LeaveLocalRootScope(cx); * return ok; * } * * NB: JS_LeaveLocalRootScope must be called once for every prior successful * call to JS_EnterLocalRootScope. If JS_EnterLocalRootScope fails, you must * not make the matching JS_LeaveLocalRootScope call. * * JS_LeaveLocalRootScopeWithResult(cx, rval) is an alternative way to leave * a local root scope that protects a result or return value, by effectively * pushing it in the caller's local root scope. * * In case a native hook allocates many objects or other GC-things, but the * native protects some of those GC-things by storing them as property values * in an object that is itself protected, the hook can call JS_ForgetLocalRoot * to free the local root automatically pushed for the now-protected GC-thing. * * JS_ForgetLocalRoot works on any GC-thing allocated in the current local * root scope, but it's more time-efficient when called on references to more * recently created GC-things. Calling it successively on other than the most * recently allocated GC-thing will tend to average the time inefficiency, and * may risk O(n^2) growth rate, but in any event, you shouldn't allocate too * many local roots if you can root as you go (build a tree of objects from * the top down, forgetting each latest-allocated GC-thing immediately upon * linking it to its parent). */ extern JS_PUBLIC_API(JSBool) JS_EnterLocalRootScope(JSContext *cx); extern JS_PUBLIC_API(void) JS_LeaveLocalRootScope(JSContext *cx); extern JS_PUBLIC_API(void) JS_LeaveLocalRootScopeWithResult(JSContext *cx, jsval rval); extern JS_PUBLIC_API(void) JS_ForgetLocalRoot(JSContext *cx, void *thing); #ifdef __cplusplus JS_END_EXTERN_C class JSAutoLocalRootScope { public: JSAutoLocalRootScope(JSContext *cx JS_GUARD_OBJECT_NOTIFIER_PARAM) : mContext(cx) { JS_GUARD_OBJECT_NOTIFIER_INIT; JS_EnterLocalRootScope(mContext); } ~JSAutoLocalRootScope() { JS_LeaveLocalRootScope(mContext); } void forget(void *thing) { JS_ForgetLocalRoot(mContext, thing); } protected: JSContext *mContext; JS_DECL_USE_GUARD_OBJECT_NOTIFIER #if 0 private: static void *operator new(size_t) CPP_THROW_NEW { return 0; }; static void operator delete(void *, size_t) { }; #endif }; JS_BEGIN_EXTERN_C #endif typedef enum JSGCRootType { JS_GC_ROOT_VALUE_PTR, JS_GC_ROOT_GCTHING_PTR } JSGCRootType; #ifdef DEBUG extern JS_PUBLIC_API(void) JS_DumpNamedRoots(JSRuntime *rt, void (*dump)(const char *name, void *rp, JSGCRootType type, void *data), void *data); #endif /* * Call JS_MapGCRoots to map the GC's roots table using map(rp, name, data). * The root is pointed at by rp; if the root is unnamed, name is null; data is * supplied from the third parameter to JS_MapGCRoots. * * The map function should return JS_MAP_GCROOT_REMOVE to cause the currently * enumerated root to be removed. To stop enumeration, set JS_MAP_GCROOT_STOP * in the return value. To keep on mapping, return JS_MAP_GCROOT_NEXT. These * constants are flags; you can OR them together. * * This function acquires and releases rt's GC lock around the mapping of the * roots table, so the map function should run to completion in as few cycles * as possible. Of course, map cannot call JS_GC, JS_MaybeGC, JS_BeginRequest, * or any JS API entry point that acquires locks, without double-tripping or * deadlocking on the GC lock. * * The JSGCRootType parameter indicates whether rp is a pointer to a Value * (which is obtained by '(Value *)rp') or a pointer to a GC-thing pointer * (which is obtained by '(void **)rp'). * * JS_MapGCRoots returns the count of roots that were successfully mapped. */ #define JS_MAP_GCROOT_NEXT 0 /* continue mapping entries */ #define JS_MAP_GCROOT_STOP 1 /* stop mapping entries */ #define JS_MAP_GCROOT_REMOVE 2 /* remove and free the current entry */ typedef intN (* JSGCRootMapFun)(void *rp, JSGCRootType type, const char *name, void *data); extern JS_PUBLIC_API(uint32) JS_MapGCRoots(JSRuntime *rt, JSGCRootMapFun map, void *data); extern JS_PUBLIC_API(JSBool) JS_LockGCThing(JSContext *cx, void *thing); extern JS_PUBLIC_API(JSBool) JS_LockGCThingRT(JSRuntime *rt, void *thing); extern JS_PUBLIC_API(JSBool) JS_UnlockGCThing(JSContext *cx, void *thing); extern JS_PUBLIC_API(JSBool) JS_UnlockGCThingRT(JSRuntime *rt, void *thing); /* * Register externally maintained GC roots. * * traceOp: the trace operation. For each root the implementation should call * JS_CallTracer whenever the root contains a traceable thing. * data: the data argument to pass to each invocation of traceOp. */ extern JS_PUBLIC_API(void) JS_SetExtraGCRoots(JSRuntime *rt, JSTraceDataOp traceOp, void *data); /* * For implementors of JSMarkOp. All new code should implement JSTraceOp * instead. */ extern JS_PUBLIC_API(void) JS_MarkGCThing(JSContext *cx, jsval v, const char *name, void *arg); /* * JS_CallTracer API and related macros for implementors of JSTraceOp, to * enumerate all references to traceable things reachable via a property or * other strong ref identified for debugging purposes by name or index or * a naming callback. * * By definition references to traceable things include non-null pointers * to JSObject, JSString and jsdouble and corresponding jsvals. * * See the JSTraceOp typedef in jspubtd.h. */ /* Trace kinds to pass to JS_Tracing. */ #define JSTRACE_OBJECT 0 #define JSTRACE_STRING 1 /* Engine private; not the trace kind of any jsval. */ #define JSTRACE_DOUBLE 2 /* * Use the following macros to check if a particular jsval is a traceable * thing and to extract the thing and its kind to pass to JS_CallTracer. */ static JS_ALWAYS_INLINE JSBool JSVAL_IS_TRACEABLE(jsval v) { /* Depend on the value representation */ return v.mask & (JSVAL_STRING_MASK | JSVAL_NONFUNOBJ_MASK | JSVAL_FUNOBJ_MASK); } static JS_ALWAYS_INLINE void * JSVAL_TO_TRACEABLE(jsval v) { return JSVAL_TO_GCTHING(v); } static JS_ALWAYS_INLINE uint32 JSVAL_TRACE_KIND(jsval v) { /* Depend on the value representation */ return (uint32)(v.mask == JSVAL_STRING_MASK); } struct JSTracer { JSContext *context; JSTraceCallback callback; JSTraceNamePrinter debugPrinter; const void *debugPrintArg; size_t debugPrintIndex; }; /* * The method to call on each reference to a traceable thing stored in a * particular JSObject or other runtime structure. With DEBUG defined the * caller before calling JS_CallTracer must initialize JSTracer fields * describing the reference using the macros below. */ extern JS_PUBLIC_API(void) JS_CallTracer(JSTracer *trc, void *thing, uint32 kind); /* * Set debugging information about a reference to a traceable thing to prepare * for the following call to JS_CallTracer. * * When printer is null, arg must be const char * or char * C string naming * the reference and index must be either (size_t)-1 indicating that the name * alone describes the reference or it must be an index into some array vector * that stores the reference. * * When printer callback is not null, the arg and index arguments are * available to the callback as debugPrinterArg and debugPrintIndex fields * of JSTracer. * * The storage for name or callback's arguments needs to live only until * the following call to JS_CallTracer returns. */ #ifdef DEBUG # define JS_SET_TRACING_DETAILS(trc, printer, arg, index) \ JS_BEGIN_MACRO \ (trc)->debugPrinter = (printer); \ (trc)->debugPrintArg = (arg); \ (trc)->debugPrintIndex = (index); \ JS_END_MACRO #else # define JS_SET_TRACING_DETAILS(trc, printer, arg, index) \ JS_BEGIN_MACRO \ JS_END_MACRO #endif /* * Convenience macro to describe the argument of JS_CallTracer using C string * and index. */ # define JS_SET_TRACING_INDEX(trc, name, index) \ JS_SET_TRACING_DETAILS(trc, NULL, name, index) /* * Convenience macro to describe the argument of JS_CallTracer using C string. */ # define JS_SET_TRACING_NAME(trc, name) \ JS_SET_TRACING_DETAILS(trc, NULL, name, (size_t)-1) /* * Convenience macro to invoke JS_CallTracer using C string as the name for * the reference to a traceable thing. */ # define JS_CALL_TRACER(trc, thing, kind, name) \ JS_BEGIN_MACRO \ JS_SET_TRACING_NAME(trc, name); \ JS_CallTracer((trc), (thing), (kind)); \ JS_END_MACRO /* * Convenience macros to invoke JS_CallTracer when jsval represents a * reference to a traceable thing. */ #define JS_CALL_VALUE_TRACER(trc, val, name) \ JS_BEGIN_MACRO \ if (JSVAL_IS_TRACEABLE(val)) { \ JS_CALL_TRACER((trc), JSVAL_TO_GCTHING(val), \ JSVAL_TRACE_KIND(val), name); \ } \ JS_END_MACRO #define JS_CALL_OBJECT_TRACER(trc, object, name) \ JS_BEGIN_MACRO \ JSObject *obj_ = (object); \ JS_ASSERT(obj_); \ JS_CALL_TRACER((trc), obj_, JSTRACE_OBJECT, name); \ JS_END_MACRO #define JS_CALL_STRING_TRACER(trc, string, name) \ JS_BEGIN_MACRO \ JSString *str_ = (string); \ JS_ASSERT(str_); \ JS_CALL_TRACER((trc), str_, JSTRACE_STRING, name); \ JS_END_MACRO #define JS_CALL_DOUBLE_TRACER(trc, number, name) \ JS_BEGIN_MACRO \ jsdouble *num_ = (number); \ JS_ASSERT(num_); \ JS_CALL_TRACER((trc), num_, JSTRACE_DOUBLE, name); \ JS_END_MACRO /* * API for JSTraceCallback implementations. */ # define JS_TRACER_INIT(trc, cx_, callback_) \ JS_BEGIN_MACRO \ (trc)->context = (cx_); \ (trc)->callback = (callback_); \ (trc)->debugPrinter = NULL; \ (trc)->debugPrintArg = NULL; \ (trc)->debugPrintIndex = (size_t)-1; \ JS_END_MACRO extern JS_PUBLIC_API(void) JS_TraceChildren(JSTracer *trc, void *thing, uint32 kind); extern JS_PUBLIC_API(void) JS_TraceRuntime(JSTracer *trc); #ifdef DEBUG extern JS_PUBLIC_API(void) JS_PrintTraceThingInfo(char *buf, size_t bufsize, JSTracer *trc, void *thing, uint32 kind, JSBool includeDetails); /* * DEBUG-only method to dump the object graph of heap-allocated things. * * fp: file for the dump output. * start: when non-null, dump only things reachable from start * thing. Otherwise dump all things reachable from the * runtime roots. * startKind: trace kind of start if start is not null. Must be 0 when * start is null. * thingToFind: dump only paths in the object graph leading to thingToFind * when non-null. * maxDepth: the upper bound on the number of edges to descend from the * graph roots. * thingToIgnore: thing to ignore during the graph traversal when non-null. */ extern JS_PUBLIC_API(JSBool) JS_DumpHeap(JSContext *cx, FILE *fp, void* startThing, uint32 startKind, void *thingToFind, size_t maxDepth, void *thingToIgnore); #endif /* * Garbage collector API. */ extern JS_PUBLIC_API(void) JS_GC(JSContext *cx); extern JS_PUBLIC_API(void) JS_MaybeGC(JSContext *cx); extern JS_PUBLIC_API(JSGCCallback) JS_SetGCCallback(JSContext *cx, JSGCCallback cb); extern JS_PUBLIC_API(JSGCCallback) JS_SetGCCallbackRT(JSRuntime *rt, JSGCCallback cb); extern JS_PUBLIC_API(JSBool) JS_IsGCMarkingTracer(JSTracer *trc); extern JS_PUBLIC_API(JSBool) JS_IsAboutToBeFinalized(JSContext *cx, void *thing); typedef enum JSGCParamKey { /* Maximum nominal heap before last ditch GC. */ JSGC_MAX_BYTES = 0, /* Number of JS_malloc bytes before last ditch GC. */ JSGC_MAX_MALLOC_BYTES = 1, /* Hoard stackPools for this long, in ms, default is 30 seconds. */ JSGC_STACKPOOL_LIFESPAN = 2, /* * The factor that defines when the GC is invoked. The factor is a * percent of the memory allocated by the GC after the last run of * the GC. When the current memory allocated by the GC is more than * this percent then the GC is invoked. The factor cannot be less * than 100 since the current memory allocated by the GC cannot be less * than the memory allocated after the last run of the GC. */ JSGC_TRIGGER_FACTOR = 3, /* Amount of bytes allocated by the GC. */ JSGC_BYTES = 4, /* Number of times when GC was invoked. */ JSGC_NUMBER = 5, /* Max size of the code cache in bytes. */ JSGC_MAX_CODE_CACHE_BYTES = 6 } JSGCParamKey; extern JS_PUBLIC_API(void) JS_SetGCParameter(JSRuntime *rt, JSGCParamKey key, uint32 value); extern JS_PUBLIC_API(uint32) JS_GetGCParameter(JSRuntime *rt, JSGCParamKey key); extern JS_PUBLIC_API(void) JS_SetGCParameterForThread(JSContext *cx, JSGCParamKey key, uint32 value); extern JS_PUBLIC_API(uint32) JS_GetGCParameterForThread(JSContext *cx, JSGCParamKey key); /* * Flush the code cache for the current thread. The operation might be * delayed if the cache cannot be flushed currently because native * code is currently executing. */ extern JS_PUBLIC_API(void) JS_FlushCaches(JSContext *cx); /* * Add a finalizer for external strings created by JS_NewExternalString (see * below) using a type-code returned from this function, and that understands * how to free or release the memory pointed at by JS_GetStringChars(str). * * Return a nonnegative type index if there is room for finalizer in the * global GC finalizers table, else return -1. If the engine is compiled * JS_THREADSAFE and used in a multi-threaded environment, this function must * be invoked on the primordial thread only, at startup -- or else the entire * program must single-thread itself while loading a module that calls this * function. */ extern JS_PUBLIC_API(intN) JS_AddExternalStringFinalizer(JSStringFinalizeOp finalizer); /* * Remove finalizer from the global GC finalizers table, returning its type * code if found, -1 if not found. * * As with JS_AddExternalStringFinalizer, there is a threading restriction * if you compile the engine JS_THREADSAFE: this function may be called for a * given finalizer pointer on only one thread; different threads may call to * remove distinct finalizers safely. * * You must ensure that all strings with finalizer's type have been collected * before calling this function. Otherwise, string data will be leaked by the * GC, for want of a finalizer to call. */ extern JS_PUBLIC_API(intN) JS_RemoveExternalStringFinalizer(JSStringFinalizeOp finalizer); /* * Create a new JSString whose chars member refers to external memory, i.e., * memory requiring spe, type-specific finalization. The type code must * be a nonnegative return value from JS_AddExternalStringFinalizer. */ extern JS_PUBLIC_API(JSString *) JS_NewExternalString(JSContext *cx, jschar *chars, size_t length, intN type); /* * Returns the external-string finalizer index for this string, or -1 if it is * an "internal" (native to JS engine) string. */ extern JS_PUBLIC_API(intN) JS_GetExternalStringGCType(JSRuntime *rt, JSString *str); /* * Sets maximum (if stack grows upward) or minimum (downward) legal stack byte * address in limitAddr for the thread or process stack used by cx. To disable * stack size checking, pass 0 for limitAddr. */ extern JS_PUBLIC_API(void) JS_SetThreadStackLimit(JSContext *cx, jsuword limitAddr); /* * Set the quota on the number of bytes that stack-like data structures can * use when the runtime compiles and executes scripts. These structures * consume heap space, so JS_SetThreadStackLimit does not bound their size. * The default quota is 32MB which is quite generous. * * The function must be called before any script compilation or execution API * calls, i.e. either immediately after JS_NewContext or from JSCONTEXT_NEW * context callback. */ extern JS_PUBLIC_API(void) JS_SetScriptStackQuota(JSContext *cx, size_t quota); #define JS_DEFAULT_SCRIPT_STACK_QUOTA ((size_t) 0x2000000) /************************************************************************/ /* * Classes, objects, and properties. */ /* For detailed comments on the function pointer types, see jspubtd.h. */ struct JSClass { const char *name; uint32 flags; /* Mandatory non-null function pointer members. */ JSPropertyOp addProperty; JSPropertyOp delProperty; JSPropertyOp getProperty; JSPropertyOp setProperty; JSEnumerateOp enumerate; JSResolveOp resolve; JSConvertOp convert; JSFinalizeOp finalize; /* Optionally non-null members start here. */ JSGetObjectOps getObjectOps; JSCheckAccessOp checkAccess; JSNative call; JSNative construct; JSXDRObjectOp xdrObject; JSHasInstanceOp hasInstance; JSMarkOp mark; JSReserveSlotsOp reserveSlots; }; struct JSExtendedClass { JSClass base; JSEqualityOp equality; JSObjectOp outerObject; JSObjectOp innerObject; JSIteratorOp iteratorObject; JSObjectOp wrappedObject; /* NB: infallible, null returns are treated as the original object */ void (*reserved0)(void); void (*reserved1)(void); void (*reserved2)(void); }; #define JSCLASS_HAS_PRIVATE (1<<0) /* objects have private slot */ #define JSCLASS_NEW_ENUMERATE (1<<1) /* has JSNewEnumerateOp hook */ #define JSCLASS_NEW_RESOLVE (1<<2) /* has JSNewResolveOp hook */ #define JSCLASS_PRIVATE_IS_NSISUPPORTS (1<<3) /* private is (nsISupports *) */ /* (1<<4) was JSCLASS_SHARE_ALL_PROPERTIES, now obsolete. See bug 527805. */ #define JSCLASS_NEW_RESOLVE_GETS_START (1<<5) /* JSNewResolveOp gets starting object in prototype chain passed in via *objp in/out parameter */ #define JSCLASS_CONSTRUCT_PROTOTYPE (1<<6) /* call constructor on class prototype */ #define JSCLASS_DOCUMENT_OBSERVER (1<<7) /* DOM document observer */ /* * To reserve slots fetched and stored via JS_Get/SetReservedSlot, bitwise-or * JSCLASS_HAS_RESERVED_SLOTS(n) into the initializer for JSClass.flags, where * n is a constant in [1, 255]. Reserved slots are indexed from 0 to n-1. */ #define JSCLASS_RESERVED_SLOTS_SHIFT 8 /* room for 8 flags below */ #define JSCLASS_RESERVED_SLOTS_WIDTH 8 /* and 16 above this field */ #define JSCLASS_RESERVED_SLOTS_MASK JS_BITMASK(JSCLASS_RESERVED_SLOTS_WIDTH) #define JSCLASS_HAS_RESERVED_SLOTS(n) (((n) & JSCLASS_RESERVED_SLOTS_MASK) \ << JSCLASS_RESERVED_SLOTS_SHIFT) #define JSCLASS_RESERVED_SLOTS(clasp) (((clasp)->flags \ >> JSCLASS_RESERVED_SLOTS_SHIFT) \ & JSCLASS_RESERVED_SLOTS_MASK) #define JSCLASS_HIGH_FLAGS_SHIFT (JSCLASS_RESERVED_SLOTS_SHIFT + \ JSCLASS_RESERVED_SLOTS_WIDTH) /* True if JSClass is really a JSExtendedClass. */ #define JSCLASS_IS_EXTENDED (1<<(JSCLASS_HIGH_FLAGS_SHIFT+0)) #define JSCLASS_IS_ANONYMOUS (1<<(JSCLASS_HIGH_FLAGS_SHIFT+1)) #define JSCLASS_IS_GLOBAL (1<<(JSCLASS_HIGH_FLAGS_SHIFT+2)) /* Indicates that JSClass.mark is a tracer with JSTraceOp type. */ #define JSCLASS_MARK_IS_TRACE (1<<(JSCLASS_HIGH_FLAGS_SHIFT+3)) /* * ECMA-262 requires that most constructors used internally create objects * with "the original Foo.prototype value" as their [[Prototype]] (__proto__) * member initial value. The "original ... value" verbiage is there because * in ECMA-262, global properties naming class objects are read/write and * deleteable, for the most part. * * Implementing this efficiently requires that global objects have classes * with the following flags. Failure to use JSCLASS_GLOBAL_FLAGS won't break * anything except the ECMA-262 "original prototype value" behavior, which was * broken for years in SpiderMonkey. In other words, without these flags you * get backward compatibility. */ #define JSCLASS_GLOBAL_FLAGS \ (JSCLASS_IS_GLOBAL | JSCLASS_HAS_RESERVED_SLOTS(JSProto_LIMIT)) /* Fast access to the original value of each standard class's prototype. */ #define JSCLASS_CACHED_PROTO_SHIFT (JSCLASS_HIGH_FLAGS_SHIFT + 8) #define JSCLASS_CACHED_PROTO_WIDTH 8 #define JSCLASS_CACHED_PROTO_MASK JS_BITMASK(JSCLASS_CACHED_PROTO_WIDTH) #define JSCLASS_HAS_CACHED_PROTO(key) ((key) << JSCLASS_CACHED_PROTO_SHIFT) #define JSCLASS_CACHED_PROTO_KEY(clasp) ((JSProtoKey) \ (((clasp)->flags \ >> JSCLASS_CACHED_PROTO_SHIFT) \ & JSCLASS_CACHED_PROTO_MASK)) /* Initializer for unused members of statically initialized JSClass structs. */ #define JSCLASS_NO_OPTIONAL_MEMBERS 0,0,0,0,0,0,0,0 #define JSCLASS_NO_RESERVED_MEMBERS 0,0,0 struct JSIdArray { void *self; jsint length; jsid vector[1]; /* actually, length jsid words */ }; extern JS_PUBLIC_API(void) JS_DestroyIdArray(JSContext *cx, JSIdArray *ida); extern JS_PUBLIC_API(JSBool) JS_ValueToId(JSContext *cx, jsval v, jsid *idp); extern JS_PUBLIC_API(JSBool) JS_IdToValue(JSContext *cx, jsid id, jsval *vp); /* * The magic XML namespace id is int-tagged, but not a valid integer jsval. * Global object classes in embeddings that enable JS_HAS_XML_SUPPORT (E4X) * should handle this id specially before converting id via JSVAL_TO_INT. */ #define JS_DEFAULT_XML_NAMESPACE_ID ((jsid) JSBOXEDWORD_VOID) /* * JSNewResolveOp flag bits. */ #define JSRESOLVE_QUALIFIED 0x01 /* resolve a qualified property id */ #define JSRESOLVE_ASSIGNING 0x02 /* resolve on the left of assignment */ #define JSRESOLVE_DETECTING 0x04 /* 'if (o.p)...' or '(o.p) ?...:...' */ #define JSRESOLVE_DECLARING 0x08 /* var, const, or function prolog op */ #define JSRESOLVE_CLASSNAME 0x10 /* class name used when constructing */ #define JSRESOLVE_WITH 0x20 /* resolve inside a with statement */ extern JS_PUBLIC_DATA(JSPropertyOp) JS_PropertyStub; extern JS_PUBLIC_DATA(JSEnumerateOp) JS_EnumerateStub; extern JS_PUBLIC_DATA(JSResolveOp) JS_ResolveStub; extern JS_PUBLIC_DATA(JSConvertOp) JS_ConvertStub; extern JS_PUBLIC_DATA(JSFinalizeOp) JS_FinalizeStub; struct JSConstDoubleSpec { jsdouble dval; const char *name; uint8 flags; uint8 spare[3]; }; /* * To define an array element rather than a named property member, cast the * element's index to (const char *) and initialize name with it, and set the * JSPROP_INDEX bit in flags. */ struct JSPropertySpec { const char *name; int8 tinyid; uint8 flags; JSPropertyOp getter; JSPropertyOp setter; }; struct JSFunctionSpec { const char *name; JSNative call; uint16 nargs; uint16 flags; /* * extra & 0xFFFF: Number of extra argument slots for local GC roots. * If fast native, must be zero. * extra >> 16: Reserved for future use (must be 0). */ uint32 extra; }; /* * Terminating sentinel initializer to put at the end of a JSFunctionSpec array * that's passed to JS_DefineFunctions or JS_InitClass. */ #define JS_FS_END JS_FS(NULL,NULL,0,0,0) /* * Initializer macro for a JSFunctionSpec array element. This is the original * kind of native function specifier initializer. Use JS_FN ("fast native", see * JSFastNative in jspubtd.h) for all functions that do not need a stack frame * when activated. */ #define JS_FS(name,call,nargs,flags,extra) \ {name, call, nargs, flags, extra} /* * "Fast native" initializer macro for a JSFunctionSpec array element. Use this * in preference to JS_FS if the native in question does not need its own stack * frame when activated. */ #define JS_FN(name,fastcall,nargs,flags) \ JS_FS(name, (JSNative)(fastcall), nargs, \ (flags) | JSFUN_FAST_NATIVE | JSFUN_STUB_GSOPS, 0) extern JS_PUBLIC_API(JSObject *) JS_InitClass(JSContext *cx, JSObject *obj, JSObject *parent_proto, JSClass *clasp, JSNative constructor, uintN nargs, JSPropertySpec *ps, JSFunctionSpec *fs, JSPropertySpec *static_ps, JSFunctionSpec *static_fs); #ifdef JS_THREADSAFE extern JS_PUBLIC_API(JSClass *) JS_GetClass(JSContext *cx, JSObject *obj); #define JS_GET_CLASS(cx,obj) JS_GetClass(cx, obj) #else extern JS_PUBLIC_API(JSClass *) JS_GetClass(JSObject *obj); #define JS_GET_CLASS(cx,obj) JS_GetClass(obj) #endif extern JS_PUBLIC_API(JSBool) JS_InstanceOf(JSContext *cx, JSObject *obj, JSClass *clasp, jsval *argv); extern JS_PUBLIC_API(JSBool) JS_HasInstance(JSContext *cx, JSObject *obj, jsval v, JSBool *bp); extern JS_PUBLIC_API(void *) JS_GetPrivate(JSContext *cx, JSObject *obj); extern JS_PUBLIC_API(JSBool) JS_SetPrivate(JSContext *cx, JSObject *obj, void *data); extern JS_PUBLIC_API(void *) JS_GetInstancePrivate(JSContext *cx, JSObject *obj, JSClass *clasp, jsval *argv); extern JS_PUBLIC_API(JSObject *) JS_GetPrototype(JSContext *cx, JSObject *obj); extern JS_PUBLIC_API(JSBool) JS_SetPrototype(JSContext *cx, JSObject *obj, JSObject *proto); extern JS_PUBLIC_API(JSObject *) JS_GetParent(JSContext *cx, JSObject *obj); extern JS_PUBLIC_API(JSBool) JS_SetParent(JSContext *cx, JSObject *obj, JSObject *parent); extern JS_PUBLIC_API(JSObject *) JS_GetConstructor(JSContext *cx, JSObject *proto); /* * Get a unique identifier for obj, good for the lifetime of obj (even if it * is moved by a copying GC). Return false on failure (likely out of memory), * and true with *idp containing the unique id on success. */ extern JS_PUBLIC_API(JSBool) JS_GetObjectId(JSContext *cx, JSObject *obj, jsid *idp); extern JS_PUBLIC_API(JSObject *) JS_NewObject(JSContext *cx, JSClass *clasp, JSObject *proto, JSObject *parent); /* * Unlike JS_NewObject, JS_NewObjectWithGivenProto does not compute a default * proto if proto's actual parameter value is null. */ extern JS_PUBLIC_API(JSObject *) JS_NewObjectWithGivenProto(JSContext *cx, JSClass *clasp, JSObject *proto, JSObject *parent); extern JS_PUBLIC_API(JSBool) JS_SealObject(JSContext *cx, JSObject *obj, JSBool deep); extern JS_PUBLIC_API(JSObject *) JS_ConstructObject(JSContext *cx, JSClass *clasp, JSObject *proto, JSObject *parent); extern JS_PUBLIC_API(JSObject *) JS_ConstructObjectWithArguments(JSContext *cx, JSClass *clasp, JSObject *proto, JSObject *parent, uintN argc, jsval *argv); extern JS_PUBLIC_API(JSObject *) JS_New(JSContext *cx, JSObject *ctor, uintN argc, jsval *argv); extern JS_PUBLIC_API(JSObject *) JS_DefineObject(JSContext *cx, JSObject *obj, const char *name, JSClass *clasp, JSObject *proto, uintN attrs); extern JS_PUBLIC_API(JSBool) JS_DefineConstDoubles(JSContext *cx, JSObject *obj, JSConstDoubleSpec *cds); extern JS_PUBLIC_API(JSBool) JS_DefineProperties(JSContext *cx, JSObject *obj, JSPropertySpec *ps); extern JS_PUBLIC_API(JSBool) JS_DefineProperty(JSContext *cx, JSObject *obj, const char *name, jsval value, JSPropertyOp getter, JSPropertyOp setter, uintN attrs); extern JS_PUBLIC_API(JSBool) JS_DefinePropertyById(JSContext *cx, JSObject *obj, jsid id, jsval value, JSPropertyOp getter, JSPropertyOp setter, uintN attrs); extern JS_PUBLIC_API(JSBool) JS_DefineOwnProperty(JSContext *cx, JSObject *obj, jsid id, jsval descriptor, JSBool *bp); /* * Determine the attributes (JSPROP_* flags) of a property on a given object. * * If the object does not have a property by that name, *foundp will be * JS_FALSE and the value of *attrsp is undefined. */ extern JS_PUBLIC_API(JSBool) JS_GetPropertyAttributes(JSContext *cx, JSObject *obj, const char *name, uintN *attrsp, JSBool *foundp); /* * The same, but if the property is native, return its getter and setter via * *getterp and *setterp, respectively (and only if the out parameter pointer * is not null). */ extern JS_PUBLIC_API(JSBool) JS_GetPropertyAttrsGetterAndSetter(JSContext *cx, JSObject *obj, const char *name, uintN *attrsp, JSBool *foundp, JSPropertyOp *getterp, JSPropertyOp *setterp); extern JS_PUBLIC_API(JSBool) JS_GetPropertyAttrsGetterAndSetterById(JSContext *cx, JSObject *obj, jsid id, uintN *attrsp, JSBool *foundp, JSPropertyOp *getterp, JSPropertyOp *setterp); /* * Set the attributes of a property on a given object. * * If the object does not have a property by that name, *foundp will be * JS_FALSE and nothing will be altered. */ extern JS_PUBLIC_API(JSBool) JS_SetPropertyAttributes(JSContext *cx, JSObject *obj, const char *name, uintN attrs, JSBool *foundp); extern JS_PUBLIC_API(JSBool) JS_DefinePropertyWithTinyId(JSContext *cx, JSObject *obj, const char *name, int8 tinyid, jsval value, JSPropertyOp getter, JSPropertyOp setter, uintN attrs); extern JS_PUBLIC_API(JSBool) JS_AliasProperty(JSContext *cx, JSObject *obj, const char *name, const char *alias); extern JS_PUBLIC_API(JSBool) JS_AlreadyHasOwnProperty(JSContext *cx, JSObject *obj, const char *name, JSBool *foundp); extern JS_PUBLIC_API(JSBool) JS_AlreadyHasOwnPropertyById(JSContext *cx, JSObject *obj, jsid id, JSBool *foundp); extern JS_PUBLIC_API(JSBool) JS_HasProperty(JSContext *cx, JSObject *obj, const char *name, JSBool *foundp); extern JS_PUBLIC_API(JSBool) JS_HasPropertyById(JSContext *cx, JSObject *obj, jsid id, JSBool *foundp); extern JS_PUBLIC_API(JSBool) JS_LookupProperty(JSContext *cx, JSObject *obj, const char *name, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_LookupPropertyById(JSContext *cx, JSObject *obj, jsid id, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_LookupPropertyWithFlags(JSContext *cx, JSObject *obj, const char *name, uintN flags, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_LookupPropertyWithFlagsById(JSContext *cx, JSObject *obj, jsid id, uintN flags, JSObject **objp, jsval *vp); struct JSPropertyDescriptor { JSObject *obj; uintN attrs; JSPropertyOp getter; JSPropertyOp setter; jsval value; }; /* * Like JS_GetPropertyAttrsGetterAndSetterById but will return a property on * an object on the prototype chain (returned in objp). If data->obj is null, * then this property was not found on the prototype chain. */ extern JS_PUBLIC_API(JSBool) JS_GetPropertyDescriptorById(JSContext *cx, JSObject *obj, jsid id, uintN flags, JSPropertyDescriptor *desc); extern JS_PUBLIC_API(JSBool) JS_GetOwnPropertyDescriptor(JSContext *cx, JSObject *obj, jsid id, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_GetProperty(JSContext *cx, JSObject *obj, const char *name, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_GetPropertyById(JSContext *cx, JSObject *obj, jsid id, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_GetMethodById(JSContext *cx, JSObject *obj, jsid id, JSObject **objp, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_GetMethod(JSContext *cx, JSObject *obj, const char *name, JSObject **objp, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_SetProperty(JSContext *cx, JSObject *obj, const char *name, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_SetPropertyById(JSContext *cx, JSObject *obj, jsid id, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_DeleteProperty(JSContext *cx, JSObject *obj, const char *name); extern JS_PUBLIC_API(JSBool) JS_DeleteProperty2(JSContext *cx, JSObject *obj, const char *name, jsval *rval); extern JS_PUBLIC_API(JSBool) JS_DeletePropertyById(JSContext *cx, JSObject *obj, jsid id); extern JS_PUBLIC_API(JSBool) JS_DeletePropertyById2(JSContext *cx, JSObject *obj, jsid id, jsval *rval); extern JS_PUBLIC_API(JSBool) JS_DefineUCProperty(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, jsval value, JSPropertyOp getter, JSPropertyOp setter, uintN attrs); /* * Determine the attributes (JSPROP_* flags) of a property on a given object. * * If the object does not have a property by that name, *foundp will be * JS_FALSE and the value of *attrsp is undefined. */ extern JS_PUBLIC_API(JSBool) JS_GetUCPropertyAttributes(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, uintN *attrsp, JSBool *foundp); /* * The same, but if the property is native, return its getter and setter via * *getterp and *setterp, respectively (and only if the out parameter pointer * is not null). */ extern JS_PUBLIC_API(JSBool) JS_GetUCPropertyAttrsGetterAndSetter(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, uintN *attrsp, JSBool *foundp, JSPropertyOp *getterp, JSPropertyOp *setterp); /* * Set the attributes of a property on a given object. * * If the object does not have a property by that name, *foundp will be * JS_FALSE and nothing will be altered. */ extern JS_PUBLIC_API(JSBool) JS_SetUCPropertyAttributes(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, uintN attrs, JSBool *foundp); extern JS_PUBLIC_API(JSBool) JS_DefineUCPropertyWithTinyId(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, int8 tinyid, jsval value, JSPropertyOp getter, JSPropertyOp setter, uintN attrs); extern JS_PUBLIC_API(JSBool) JS_AlreadyHasOwnUCProperty(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, JSBool *foundp); extern JS_PUBLIC_API(JSBool) JS_HasUCProperty(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, JSBool *vp); extern JS_PUBLIC_API(JSBool) JS_LookupUCProperty(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_GetUCProperty(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_SetUCProperty(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_DeleteUCProperty2(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, jsval *rval); extern JS_PUBLIC_API(JSObject *) JS_NewArrayObject(JSContext *cx, jsint length, jsval *vector); extern JS_PUBLIC_API(JSBool) JS_IsArrayObject(JSContext *cx, JSObject *obj); extern JS_PUBLIC_API(JSBool) JS_GetArrayLength(JSContext *cx, JSObject *obj, jsuint *lengthp); extern JS_PUBLIC_API(JSBool) JS_SetArrayLength(JSContext *cx, JSObject *obj, jsuint length); extern JS_PUBLIC_API(JSBool) JS_HasArrayLength(JSContext *cx, JSObject *obj, jsuint *lengthp); extern JS_PUBLIC_API(JSBool) JS_DefineElement(JSContext *cx, JSObject *obj, jsint index, jsval value, JSPropertyOp getter, JSPropertyOp setter, uintN attrs); extern JS_PUBLIC_API(JSBool) JS_AliasElement(JSContext *cx, JSObject *obj, const char *name, jsint alias); extern JS_PUBLIC_API(JSBool) JS_AlreadyHasOwnElement(JSContext *cx, JSObject *obj, jsint index, JSBool *foundp); extern JS_PUBLIC_API(JSBool) JS_HasElement(JSContext *cx, JSObject *obj, jsint index, JSBool *foundp); extern JS_PUBLIC_API(JSBool) JS_LookupElement(JSContext *cx, JSObject *obj, jsint index, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_GetElement(JSContext *cx, JSObject *obj, jsint index, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_SetElement(JSContext *cx, JSObject *obj, jsint index, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_DeleteElement(JSContext *cx, JSObject *obj, jsint index); extern JS_PUBLIC_API(JSBool) JS_DeleteElement2(JSContext *cx, JSObject *obj, jsint index, jsval *rval); extern JS_PUBLIC_API(void) JS_ClearScope(JSContext *cx, JSObject *obj); extern JS_PUBLIC_API(JSIdArray *) JS_Enumerate(JSContext *cx, JSObject *obj); /* * Create an object to iterate over enumerable properties of obj, in arbitrary * property definition order. NB: This differs from longstanding for..in loop * order, which uses order of property definition in obj. */ extern JS_PUBLIC_API(JSObject *) JS_NewPropertyIterator(JSContext *cx, JSObject *obj); /* * Return true on success with *idp containing the id of the next enumerable * property to visit using iterobj, or JSVAL_VOID if there is no such property * left to visit. Return false on error. */ extern JS_PUBLIC_API(JSBool) JS_NextProperty(JSContext *cx, JSObject *iterobj, jsid *idp); extern JS_PUBLIC_API(JSBool) JS_CheckAccess(JSContext *cx, JSObject *obj, jsid id, JSAccessMode mode, jsval *vp, uintN *attrsp); extern JS_PUBLIC_API(JSBool) JS_GetReservedSlot(JSContext *cx, JSObject *obj, uint32 index, jsval *vp); extern JS_PUBLIC_API(JSBool) JS_SetReservedSlot(JSContext *cx, JSObject *obj, uint32 index, jsval v); /************************************************************************/ /* * Security protocol. */ struct JSPrincipals { char *codebase; /* XXX unspecified and unused by Mozilla code -- can we remove these? */ void * (* getPrincipalArray)(JSContext *cx, JSPrincipals *); JSBool (* globalPrivilegesEnabled)(JSContext *cx, JSPrincipals *); /* Don't call "destroy"; use reference counting macros below. */ jsrefcount refcount; void (* destroy)(JSContext *cx, JSPrincipals *); JSBool (* subsume)(JSPrincipals *, JSPrincipals *); }; #ifdef JS_THREADSAFE #define JSPRINCIPALS_HOLD(cx, principals) JS_HoldPrincipals(cx,principals) #define JSPRINCIPALS_DROP(cx, principals) JS_DropPrincipals(cx,principals) extern JS_PUBLIC_API(jsrefcount) JS_HoldPrincipals(JSContext *cx, JSPrincipals *principals); extern JS_PUBLIC_API(jsrefcount) JS_DropPrincipals(JSContext *cx, JSPrincipals *principals); #else #define JSPRINCIPALS_HOLD(cx, principals) (++(principals)->refcount) #define JSPRINCIPALS_DROP(cx, principals) \ ((--(principals)->refcount == 0) \ ? ((*(principals)->destroy)((cx), (principals)), 0) \ : (principals)->refcount) #endif struct JSSecurityCallbacks { JSCheckAccessOp checkObjectAccess; JSPrincipalsTranscoder principalsTranscoder; JSObjectPrincipalsFinder findObjectPrincipals; JSCSPEvalChecker contentSecurityPolicyAllows; }; extern JS_PUBLIC_API(JSSecurityCallbacks *) JS_SetRuntimeSecurityCallbacks(JSRuntime *rt, JSSecurityCallbacks *callbacks); extern JS_PUBLIC_API(JSSecurityCallbacks *) JS_GetRuntimeSecurityCallbacks(JSRuntime *rt); extern JS_PUBLIC_API(JSSecurityCallbacks *) JS_SetContextSecurityCallbacks(JSContext *cx, JSSecurityCallbacks *callbacks); extern JS_PUBLIC_API(JSSecurityCallbacks *) JS_GetSecurityCallbacks(JSContext *cx); /************************************************************************/ /* * Functions and scripts. */ extern JS_PUBLIC_API(JSFunction *) JS_NewFunction(JSContext *cx, JSNative call, uintN nargs, uintN flags, JSObject *parent, const char *name); extern JS_PUBLIC_API(JSObject *) JS_GetFunctionObject(JSFunction *fun); /* * Deprecated, useful only for diagnostics. Use JS_GetFunctionId instead for * anonymous vs. "anonymous" disambiguation and Unicode fidelity. */ extern JS_PUBLIC_API(const char *) JS_GetFunctionName(JSFunction *fun); /* * Return the function's identifier as a JSString, or null if fun is unnamed. * The returned string lives as long as fun, so you don't need to root a saved * reference to it if fun is well-connected or rooted, and provided you bound * the use of the saved reference by fun's lifetime. * * Prefer JS_GetFunctionId over JS_GetFunctionName because it returns null for * truly anonymous functions, and because it doesn't chop to ISO-Latin-1 chars * from UTF-16-ish jschars. */ extern JS_PUBLIC_API(JSString *) JS_GetFunctionId(JSFunction *fun); /* * Return JSFUN_* flags for fun. */ extern JS_PUBLIC_API(uintN) JS_GetFunctionFlags(JSFunction *fun); /* * Return the arity (length) of fun. */ extern JS_PUBLIC_API(uint16) JS_GetFunctionArity(JSFunction *fun); /* * Infallible predicate to test whether obj is a function object (faster than * comparing obj's class name to "Function", but equivalent unless someone has * overwritten the "Function" identifier with a different constructor and then * created instances using that constructor that might be passed in as obj). */ extern JS_PUBLIC_API(JSBool) JS_ObjectIsFunction(JSContext *cx, JSObject *obj); extern JS_PUBLIC_API(JSBool) JS_DefineFunctions(JSContext *cx, JSObject *obj, JSFunctionSpec *fs); extern JS_PUBLIC_API(JSFunction *) JS_DefineFunction(JSContext *cx, JSObject *obj, const char *name, JSNative call, uintN nargs, uintN attrs); extern JS_PUBLIC_API(JSFunction *) JS_DefineUCFunction(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen, JSNative call, uintN nargs, uintN attrs); extern JS_PUBLIC_API(JSObject *) JS_CloneFunctionObject(JSContext *cx, JSObject *funobj, JSObject *parent); /* * Given a buffer, return JS_FALSE if the buffer might become a valid * javascript statement with the addition of more lines. Otherwise return * JS_TRUE. The intent is to support interactive compilation - accumulate * lines in a buffer until JS_BufferIsCompilableUnit is true, then pass it to * the compiler. */ extern JS_PUBLIC_API(JSBool) JS_BufferIsCompilableUnit(JSContext *cx, JSObject *obj, const char *bytes, size_t length); /* * The JSScript objects returned by the following functions refer to string and * other kinds of literals, including doubles and RegExp objects. These * literals are vulnerable to garbage collection; to root script objects and * prevent literals from being collected, create a rootable object using * JS_NewScriptObject, and root the resulting object using JS_Add[Named]Root. */ extern JS_PUBLIC_API(JSScript *) JS_CompileScript(JSContext *cx, JSObject *obj, const char *bytes, size_t length, const char *filename, uintN lineno); extern JS_PUBLIC_API(JSScript *) JS_CompileScriptForPrincipals(JSContext *cx, JSObject *obj, JSPrincipals *principals, const char *bytes, size_t length, const char *filename, uintN lineno); extern JS_PUBLIC_API(JSScript *) JS_CompileUCScript(JSContext *cx, JSObject *obj, const jschar *chars, size_t length, const char *filename, uintN lineno); extern JS_PUBLIC_API(JSScript *) JS_CompileUCScriptForPrincipals(JSContext *cx, JSObject *obj, JSPrincipals *principals, const jschar *chars, size_t length, const char *filename, uintN lineno); extern JS_PUBLIC_API(JSScript *) JS_CompileFile(JSContext *cx, JSObject *obj, const char *filename); extern JS_PUBLIC_API(JSScript *) JS_CompileFileHandle(JSContext *cx, JSObject *obj, const char *filename, FILE *fh); extern JS_PUBLIC_API(JSScript *) JS_CompileFileHandleForPrincipals(JSContext *cx, JSObject *obj, const char *filename, FILE *fh, JSPrincipals *principals); /* * NB: you must use JS_NewScriptObject and root a pointer to its return value * in order to keep a JSScript and its atoms safe from garbage collection after * creating the script via JS_Compile* and before a JS_ExecuteScript* call. * E.g., and without error checks: * * JSScript *script = JS_CompileFile(cx, global, filename); * JSObject *scrobj = JS_NewScriptObject(cx, script); * JS_AddNamedRoot(cx, &scrobj, "scrobj"); * do { * jsval result; * JS_ExecuteScript(cx, global, script, &result); * JS_GC(); * } while (!JSVAL_IS_BOOLEAN(result) || JSVAL_TO_BOOLEAN(result)); * JS_RemoveRoot(cx, &scrobj); */ extern JS_PUBLIC_API(JSObject *) JS_NewScriptObject(JSContext *cx, JSScript *script); /* * Infallible getter for a script's object. If JS_NewScriptObject has not been * called on script yet, the return value will be null. */ extern JS_PUBLIC_API(JSObject *) JS_GetScriptObject(JSScript *script); extern JS_PUBLIC_API(void) JS_DestroyScript(JSContext *cx, JSScript *script); extern JS_PUBLIC_API(JSFunction *) JS_CompileFunction(JSContext *cx, JSObject *obj, const char *name, uintN nargs, const char **argnames, const char *bytes, size_t length, const char *filename, uintN lineno); extern JS_PUBLIC_API(JSFunction *) JS_CompileFunctionForPrincipals(JSContext *cx, JSObject *obj, JSPrincipals *principals, const char *name, uintN nargs, const char **argnames, const char *bytes, size_t length, const char *filename, uintN lineno); extern JS_PUBLIC_API(JSFunction *) JS_CompileUCFunction(JSContext *cx, JSObject *obj, const char *name, uintN nargs, const char **argnames, const jschar *chars, size_t length, const char *filename, uintN lineno); extern JS_PUBLIC_API(JSFunction *) JS_CompileUCFunctionForPrincipals(JSContext *cx, JSObject *obj, JSPrincipals *principals, const char *name, uintN nargs, const char **argnames, const jschar *chars, size_t length, const char *filename, uintN lineno); extern JS_PUBLIC_API(JSString *) JS_DecompileScript(JSContext *cx, JSScript *script, const char *name, uintN indent); /* * API extension: OR this into indent to avoid pretty-printing the decompiled * source resulting from JS_DecompileFunction{,Body}. */ #define JS_DONT_PRETTY_PRINT ((uintN)0x8000) extern JS_PUBLIC_API(JSString *) JS_DecompileFunction(JSContext *cx, JSFunction *fun, uintN indent); extern JS_PUBLIC_API(JSString *) JS_DecompileFunctionBody(JSContext *cx, JSFunction *fun, uintN indent); /* * NB: JS_ExecuteScript and the JS_Evaluate*Script* quadruplets use the obj * parameter as the initial scope chain header, the 'this' keyword value, and * the variables object (ECMA parlance for where 'var' and 'function' bind * names) of the execution context for script. * * Using obj as the variables object is problematic if obj's parent (which is * the scope chain link; see JS_SetParent and JS_NewObject) is not null: in * this case, variables created by 'var x = 0', e.g., go in obj, but variables * created by assignment to an unbound id, 'x = 0', go in the last object on * the scope chain linked by parent. * * ECMA calls that last scoping object the "global object", but note that many * embeddings have several such objects. ECMA requires that "global code" be * executed with the variables object equal to this global object. But these * JS API entry points provide freedom to execute code against a "sub-global", * i.e., a parented or scoped object, in which case the variables object will * differ from the last object on the scope chain, resulting in confusing and * non-ECMA explicit vs. implicit variable creation. * * Caveat embedders: unless you already depend on this buggy variables object * binding behavior, you should call JS_SetOptions(cx, JSOPTION_VAROBJFIX) or * JS_SetOptions(cx, JS_GetOptions(cx) | JSOPTION_VAROBJFIX) -- the latter if * someone may have set other options on cx already -- for each context in the * application, if you pass parented objects as the obj parameter, or may ever * pass such objects in the future. * * Why a runtime option? The alternative is to add six or so new API entry * points with signatures matching the following six, and that doesn't seem * worth the code bloat cost. Such new entry points would probably have less * obvious names, too, so would not tend to be used. The JS_SetOption call, * OTOH, can be more easily hacked into existing code that does not depend on * the bug; such code can continue to use the familiar JS_EvaluateScript, * etc., entry points. */ extern JS_PUBLIC_API(JSBool) JS_ExecuteScript(JSContext *cx, JSObject *obj, JSScript *script, jsval *rval); /* * Execute either the function-defining prolog of a script, or the script's * main body, but not both. */ typedef enum JSExecPart { JSEXEC_PROLOG, JSEXEC_MAIN } JSExecPart; extern JS_PUBLIC_API(JSBool) JS_EvaluateScript(JSContext *cx, JSObject *obj, const char *bytes, uintN length, const char *filename, uintN lineno, jsval *rval); extern JS_PUBLIC_API(JSBool) JS_EvaluateScriptForPrincipals(JSContext *cx, JSObject *obj, JSPrincipals *principals, const char *bytes, uintN length, const char *filename, uintN lineno, jsval *rval); extern JS_PUBLIC_API(JSBool) JS_EvaluateUCScript(JSContext *cx, JSObject *obj, const jschar *chars, uintN length, const char *filename, uintN lineno, jsval *rval); extern JS_PUBLIC_API(JSBool) JS_EvaluateUCScriptForPrincipals(JSContext *cx, JSObject *obj, JSPrincipals *principals, const jschar *chars, uintN length, const char *filename, uintN lineno, jsval *rval); extern JS_PUBLIC_API(JSBool) JS_CallFunction(JSContext *cx, JSObject *obj, JSFunction *fun, uintN argc, jsval *argv, jsval *rval); extern JS_PUBLIC_API(JSBool) JS_CallFunctionName(JSContext *cx, JSObject *obj, const char *name, uintN argc, jsval *argv, jsval *rval); extern JS_PUBLIC_API(JSBool) JS_CallFunctionValue(JSContext *cx, JSObject *obj, jsval fval, uintN argc, jsval *argv, jsval *rval); /* * These functions allow setting an operation callback that will be called * from the thread the context is associated with some time after any thread * triggered the callback using JS_TriggerOperationCallback(cx). * * In a threadsafe build the engine internally triggers operation callbacks * under certain circumstances (i.e. GC and title transfer) to force the * context to yield its current request, which the engine always * automatically does immediately prior to calling the callback function. * The embedding should thus not rely on callbacks being triggered through * the external API only. * * Important note: Additional callbacks can occur inside the callback handler * if it re-enters the JS engine. The embedding must ensure that the callback * is disconnected before attempting such re-entry. */ extern JS_PUBLIC_API(JSOperationCallback) JS_SetOperationCallback(JSContext *cx, JSOperationCallback callback); extern JS_PUBLIC_API(JSOperationCallback) JS_GetOperationCallback(JSContext *cx); extern JS_PUBLIC_API(void) JS_TriggerOperationCallback(JSContext *cx); extern JS_PUBLIC_API(void) JS_TriggerAllOperationCallbacks(JSRuntime *rt); extern JS_PUBLIC_API(JSBool) JS_IsRunning(JSContext *cx); extern JS_PUBLIC_API(JSBool) JS_IsConstructing(JSContext *cx); /* * Saving and restoring frame chains. * * These two functions are used to set aside cx's call stack while that stack * is inactive. After a call to JS_SaveFrameChain, it looks as if there is no * code running on cx. Before calling JS_RestoreFrameChain, cx's call stack * must be balanced and all nested calls to JS_SaveFrameChain must have had * matching JS_RestoreFrameChain calls. * * JS_SaveFrameChain deals with cx not having any code running on it. A null * return does not signify an error, and JS_RestoreFrameChain handles a null * frame pointer argument safely. */ extern JS_PUBLIC_API(JSStackFrame *) JS_SaveFrameChain(JSContext *cx); extern JS_PUBLIC_API(void) JS_RestoreFrameChain(JSContext *cx, JSStackFrame *fp); /************************************************************************/ /* * Strings. * * NB: JS_NewString takes ownership of bytes on success, avoiding a copy; but * on error (signified by null return), it leaves bytes owned by the caller. * So the caller must free bytes in the error case, if it has no use for them. * In contrast, all the JS_New*StringCopy* functions do not take ownership of * the character memory passed to them -- they copy it. */ extern JS_PUBLIC_API(JSString *) JS_NewString(JSContext *cx, char *bytes, size_t length); extern JS_PUBLIC_API(JSString *) JS_NewStringCopyN(JSContext *cx, const char *s, size_t n); extern JS_PUBLIC_API(JSString *) JS_NewStringCopyZ(JSContext *cx, const char *s); extern JS_PUBLIC_API(JSString *) JS_InternString(JSContext *cx, const char *s); extern JS_PUBLIC_API(JSString *) JS_NewUCString(JSContext *cx, jschar *chars, size_t length); extern JS_PUBLIC_API(JSString *) JS_NewUCStringCopyN(JSContext *cx, const jschar *s, size_t n); extern JS_PUBLIC_API(JSString *) JS_NewUCStringCopyZ(JSContext *cx, const jschar *s); extern JS_PUBLIC_API(JSString *) JS_InternUCStringN(JSContext *cx, const jschar *s, size_t length); extern JS_PUBLIC_API(JSString *) JS_InternUCString(JSContext *cx, const jschar *s); extern JS_PUBLIC_API(char *) JS_GetStringBytes(JSString *str); extern JS_PUBLIC_API(jschar *) JS_GetStringChars(JSString *str); extern JS_PUBLIC_API(size_t) JS_GetStringLength(JSString *str); extern JS_PUBLIC_API(const char *) JS_GetStringBytesZ(JSContext *cx, JSString *str); extern JS_PUBLIC_API(const jschar *) JS_GetStringCharsZ(JSContext *cx, JSString *str); extern JS_PUBLIC_API(intN) JS_CompareStrings(JSString *str1, JSString *str2); /* * Mutable string support. A string's characters are never mutable in this JS * implementation, but a growable string has a buffer that can be reallocated, * and a dependent string is a substring of another (growable, dependent, or * immutable) string. The direct data members of the (opaque to API clients) * JSString struct may be changed in a single-threaded way for growable and * dependent strings. * * Therefore mutable strings cannot be used by more than one thread at a time. * You may call JS_MakeStringImmutable to convert the string from a mutable * (growable or dependent) string to an immutable (and therefore thread-safe) * string. The engine takes care of converting growable and dependent strings * to immutable for you if you store strings in multi-threaded objects using * JS_SetProperty or kindred API entry points. * * If you store a JSString pointer in a native data structure that is (safely) * accessible to multiple threads, you must call JS_MakeStringImmutable before * retiring the store. */ extern JS_PUBLIC_API(JSString *) JS_NewGrowableString(JSContext *cx, jschar *chars, size_t length); /* * Create a dependent string, i.e., a string that owns no character storage, * but that refers to a slice of another string's chars. Dependent strings * are mutable by definition, so the thread safety comments above apply. */ extern JS_PUBLIC_API(JSString *) JS_NewDependentString(JSContext *cx, JSString *str, size_t start, size_t length); /* * Concatenate two strings, resulting in a new growable string. If you create * the left string and pass it to JS_ConcatStrings on a single thread, try to * use JS_NewGrowableString to create the left string -- doing so helps Concat * avoid allocating a new buffer for the result and copying left's chars into * the new buffer. See above for thread safety comments. */ extern JS_PUBLIC_API(JSString *) JS_ConcatStrings(JSContext *cx, JSString *left, JSString *right); /* * Convert a dependent string into an independent one. This function does not * change the string's mutability, so the thread safety comments above apply. */ extern JS_PUBLIC_API(const jschar *) JS_UndependString(JSContext *cx, JSString *str); /* * Convert a mutable string (either growable or dependent) into an immutable, * thread-safe one. */ extern JS_PUBLIC_API(JSBool) JS_MakeStringImmutable(JSContext *cx, JSString *str); /* * Return JS_TRUE if C (char []) strings passed via the API and internally * are UTF-8. */ JS_PUBLIC_API(JSBool) JS_CStringsAreUTF8(void); /* * Update the value to be returned by JS_CStringsAreUTF8(). Once set, it * can never be changed. This API must be called before the first call to * JS_NewRuntime. */ JS_PUBLIC_API(void) JS_SetCStringsAreUTF8(void); /* * Character encoding support. * * For both JS_EncodeCharacters and JS_DecodeBytes, set *dstlenp to the size * of the destination buffer before the call; on return, *dstlenp contains the * number of bytes (JS_EncodeCharacters) or jschars (JS_DecodeBytes) actually * stored. To determine the necessary destination buffer size, make a sizing * call that passes NULL for dst. * * On errors, the functions report the error. In that case, *dstlenp contains * the number of characters or bytes transferred so far. If cx is NULL, no * error is reported on failure, and the functions simply return JS_FALSE. * * NB: Neither function stores an additional zero byte or jschar after the * transcoded string. * * If JS_CStringsAreUTF8() is true then JS_EncodeCharacters encodes to * UTF-8, and JS_DecodeBytes decodes from UTF-8, which may create additional * errors if the character sequence is malformed. If UTF-8 support is * disabled, the functions deflate and inflate, respectively. */ JS_PUBLIC_API(JSBool) JS_EncodeCharacters(JSContext *cx, const jschar *src, size_t srclen, char *dst, size_t *dstlenp); JS_PUBLIC_API(JSBool) JS_DecodeBytes(JSContext *cx, const char *src, size_t srclen, jschar *dst, size_t *dstlenp); /* * A variation on JS_EncodeCharacters where a null terminated string is * returned that you are expected to call JS_free on when done. */ JS_PUBLIC_API(char *) JS_EncodeString(JSContext *cx, JSString *str); /************************************************************************/ /* * JSON functions */ typedef JSBool (* JSONWriteCallback)(const jschar *buf, uint32 len, void *data); /* * JSON.stringify as specified by ES3.1 (draft) */ JS_PUBLIC_API(JSBool) JS_Stringify(JSContext *cx, jsval *vp, JSObject *replacer, jsval space, JSONWriteCallback callback, void *data); /* * Retrieve a toJSON function. If found, set vp to its result. */ JS_PUBLIC_API(JSBool) JS_TryJSON(JSContext *cx, jsval *vp); /* * JSON.parse as specified by ES3.1 (draft) */ JS_PUBLIC_API(JSONParser *) JS_BeginJSONParse(JSContext *cx, jsval *vp); JS_PUBLIC_API(JSBool) JS_ConsumeJSONText(JSContext *cx, JSONParser *jp, const jschar *data, uint32 len); JS_PUBLIC_API(JSBool) JS_FinishJSONParse(JSContext *cx, JSONParser *jp, jsval reviver); /************************************************************************/ /* * Locale specific string conversion and error message callbacks. */ struct JSLocaleCallbacks { JSLocaleToUpperCase localeToUpperCase; JSLocaleToLowerCase localeToLowerCase; JSLocaleCompare localeCompare; JSLocaleToUnicode localeToUnicode; JSErrorCallback localeGetErrorMessage; }; /* * Establish locale callbacks. The pointer must persist as long as the * JSContext. Passing NULL restores the default behaviour. */ extern JS_PUBLIC_API(void) JS_SetLocaleCallbacks(JSContext *cx, JSLocaleCallbacks *callbacks); /* * Return the address of the current locale callbacks struct, which may * be NULL. */ extern JS_PUBLIC_API(JSLocaleCallbacks *) JS_GetLocaleCallbacks(JSContext *cx); /************************************************************************/ /* * Error reporting. */ /* * Report an exception represented by the sprintf-like conversion of format * and its arguments. This exception message string is passed to a pre-set * JSErrorReporter function (set by JS_SetErrorReporter; see jspubtd.h for * the JSErrorReporter typedef). */ extern JS_PUBLIC_API(void) JS_ReportError(JSContext *cx, const char *format, ...); /* * Use an errorNumber to retrieve the format string, args are char * */ extern JS_PUBLIC_API(void) JS_ReportErrorNumber(JSContext *cx, JSErrorCallback errorCallback, void *userRef, const uintN errorNumber, ...); /* * Use an errorNumber to retrieve the format string, args are jschar * */ extern JS_PUBLIC_API(void) JS_ReportErrorNumberUC(JSContext *cx, JSErrorCallback errorCallback, void *userRef, const uintN errorNumber, ...); /* * As above, but report a warning instead (JSREPORT_IS_WARNING(report.flags)). * Return true if there was no error trying to issue the warning, and if the * warning was not converted into an error due to the JSOPTION_WERROR option * being set, false otherwise. */ extern JS_PUBLIC_API(JSBool) JS_ReportWarning(JSContext *cx, const char *format, ...); extern JS_PUBLIC_API(JSBool) JS_ReportErrorFlagsAndNumber(JSContext *cx, uintN flags, JSErrorCallback errorCallback, void *userRef, const uintN errorNumber, ...); extern JS_PUBLIC_API(JSBool) JS_ReportErrorFlagsAndNumberUC(JSContext *cx, uintN flags, JSErrorCallback errorCallback, void *userRef, const uintN errorNumber, ...); /* * Complain when out of memory. */ extern JS_PUBLIC_API(void) JS_ReportOutOfMemory(JSContext *cx); /* * Complain when an allocation size overflows the maximum supported limit. */ extern JS_PUBLIC_API(void) JS_ReportAllocationOverflow(JSContext *cx); struct JSErrorReport { const char *filename; /* source file name, URL, etc., or null */ uintN lineno; /* source line number */ const char *linebuf; /* offending source line without final \n */ const char *tokenptr; /* pointer to error token in linebuf */ const jschar *uclinebuf; /* unicode (original) line buffer */ const jschar *uctokenptr; /* unicode (original) token pointer */ uintN flags; /* error/warning, etc. */ uintN errorNumber; /* the error number, e.g. see js.msg */ const jschar *ucmessage; /* the (default) error message */ const jschar **messageArgs; /* arguments for the error message */ }; /* * JSErrorReport flag values. These may be freely composed. */ #define JSREPORT_ERROR 0x0 /* pseudo-flag for default case */ #define JSREPORT_WARNING 0x1 /* reported via JS_ReportWarning */ #define JSREPORT_EXCEPTION 0x2 /* exception was thrown */ #define JSREPORT_STRICT 0x4 /* error or warning due to strict option */ /* * This condition is an error in strict mode code, a warning if * JS_HAS_STRICT_OPTION(cx), and otherwise should not be reported at * all. We check the strictness of the context's top frame's script; * where that isn't appropriate, the caller should do the right checks * itself instead of using this flag. */ #define JSREPORT_STRICT_MODE_ERROR 0x8 /* * If JSREPORT_EXCEPTION is set, then a JavaScript-catchable exception * has been thrown for this runtime error, and the host should ignore it. * Exception-aware hosts should also check for JS_IsExceptionPending if * JS_ExecuteScript returns failure, and signal or propagate the exception, as * appropriate. */ #define JSREPORT_IS_WARNING(flags) (((flags) & JSREPORT_WARNING) != 0) #define JSREPORT_IS_EXCEPTION(flags) (((flags) & JSREPORT_EXCEPTION) != 0) #define JSREPORT_IS_STRICT(flags) (((flags) & JSREPORT_STRICT) != 0) #define JSREPORT_IS_STRICT_MODE_ERROR(flags) (((flags) & \ JSREPORT_STRICT_MODE_ERROR) != 0) extern JS_PUBLIC_API(JSErrorReporter) JS_SetErrorReporter(JSContext *cx, JSErrorReporter er); /************************************************************************/ /* * Regular Expressions. */ #define JSREG_FOLD 0x01 /* fold uppercase to lowercase */ #define JSREG_GLOB 0x02 /* global exec, creates array of matches */ #define JSREG_MULTILINE 0x04 /* treat ^ and $ as begin and end of line */ #define JSREG_STICKY 0x08 /* only match starting at lastIndex */ #define JSREG_FLAT 0x10 /* parse as a flat regexp */ #define JSREG_NOCOMPILE 0x20 /* do not try to compile to native code */ extern JS_PUBLIC_API(JSObject *) JS_NewRegExpObject(JSContext *cx, char *bytes, size_t length, uintN flags); extern JS_PUBLIC_API(JSObject *) JS_NewUCRegExpObject(JSContext *cx, jschar *chars, size_t length, uintN flags); extern JS_PUBLIC_API(void) JS_SetRegExpInput(JSContext *cx, JSString *input, JSBool multiline); extern JS_PUBLIC_API(void) JS_ClearRegExpStatics(JSContext *cx); extern JS_PUBLIC_API(void) JS_ClearRegExpRoots(JSContext *cx); /* TODO: compile, exec, get/set other statics... */ /************************************************************************/ extern JS_PUBLIC_API(JSBool) JS_IsExceptionPending(JSContext *cx); extern JS_PUBLIC_API(JSBool) JS_GetPendingException(JSContext *cx, jsval *vp); extern JS_PUBLIC_API(void) JS_SetPendingException(JSContext *cx, jsval v); extern JS_PUBLIC_API(void) JS_ClearPendingException(JSContext *cx); extern JS_PUBLIC_API(JSBool) JS_ReportPendingException(JSContext *cx); /* * Save the current exception state. This takes a snapshot of cx's current * exception state without making any change to that state. * * The returned state pointer MUST be passed later to JS_RestoreExceptionState * (to restore that saved state, overriding any more recent state) or else to * JS_DropExceptionState (to free the state struct in case it is not correct * or desirable to restore it). Both Restore and Drop free the state struct, * so callers must stop using the pointer returned from Save after calling the * Release or Drop API. */ extern JS_PUBLIC_API(JSExceptionState *) JS_SaveExceptionState(JSContext *cx); extern JS_PUBLIC_API(void) JS_RestoreExceptionState(JSContext *cx, JSExceptionState *state); extern JS_PUBLIC_API(void) JS_DropExceptionState(JSContext *cx, JSExceptionState *state); /* * If the given value is an exception object that originated from an error, * the exception will contain an error report struct, and this API will return * the address of that struct. Otherwise, it returns NULL. The lifetime of * the error report struct that might be returned is the same as the lifetime * of the exception object. */ extern JS_PUBLIC_API(JSErrorReport *) JS_ErrorFromException(JSContext *cx, jsval v); /* * Given a reported error's message and JSErrorReport struct pointer, throw * the corresponding exception on cx. */ extern JS_PUBLIC_API(JSBool) JS_ThrowReportedError(JSContext *cx, const char *message, JSErrorReport *reportp); /* * Throws a StopIteration exception on cx. */ extern JS_PUBLIC_API(JSBool) JS_ThrowStopIteration(JSContext *cx); /* * Associate the current thread with the given context. This is done * implicitly by JS_NewContext. * * Returns the old thread id for this context, which should be treated as * an opaque value. This value is provided for comparison to 0, which * indicates that ClearContextThread has been called on this context * since the last SetContextThread, or non-0, which indicates the opposite. */ extern JS_PUBLIC_API(jsword) JS_GetContextThread(JSContext *cx); extern JS_PUBLIC_API(jsword) JS_SetContextThread(JSContext *cx); extern JS_PUBLIC_API(jsword) JS_ClearContextThread(JSContext *cx); /************************************************************************/ #ifdef DEBUG #define JS_GC_ZEAL 1 #endif #ifdef JS_GC_ZEAL extern JS_PUBLIC_API(void) JS_SetGCZeal(JSContext *cx, uint8 zeal); #endif JS_END_EXTERN_C /************************************************************************/ #ifdef __cplusplus /* * Spanky new C++ API */ namespace js { struct NullTag { explicit NullTag() {} }; struct UndefinedTag { explicit UndefinedTag() {} }; struct Int32Tag { explicit Int32Tag(int32 i32) : i32(i32) {} int32 i32; }; struct DoubleTag { explicit DoubleTag(double dbl) : dbl(dbl) {} double dbl; }; struct NumberTag { explicit NumberTag(double dbl) : dbl(dbl) {} double dbl; }; struct FunObjTag { explicit FunObjTag(JSObject &obj) : obj(obj) {} JSObject &obj; }; struct FunObjOrNull { explicit FunObjOrNull(JSObject *obj) : obj(obj) {} JSObject *obj; }; struct FunObjOrUndefinedTag { explicit FunObjOrUndefinedTag(JSObject *obj) : obj(obj) {} JSObject *obj; }; struct NonFunObjTag { explicit NonFunObjTag(JSObject &o) : obj(obj) {} JSObject &obj; }; struct NonFunObjOrNull { explicit NonFunObjOrNull(JSObject *obj) : obj(obj) {} JSObject *obj; }; struct ObjectTag { explicit ObjectTag(JSObject &obj) : obj(obj) {} JSObject &obj; }; struct ObjectOrNullTag { explicit ObjectOrNullTag(JSObject *obj) : obj(obj) {} JSObject *obj; }; struct BooleanTag { explicit BooleanTag(bool boo) : boo(boo) {} bool boo; }; struct PrivateVoidPtrTag { explicit PrivateVoidPtrTag(void *ptr) : ptr(ptr) {} void *ptr; }; /* * An ObjPtr is a restriction of a Value (below) to the three types: null, * non-function object and function object. ObjPtr is useful when code * conceptually is working with a JSObject*, but wants to avoid unnecessarily * querying obj->isFunction() by passing around the type tag as well. Also, * ObjPtr provides syntactic sugar so that it behaves more like a JSObject*. * * N.B. ObjPtr is not layout compatible with Value: on 32-bit systems, it does * not need the extra 2 words needed by Value. */ class ObjPtr { protected: typedef JSValueMaskType MaskType; static const MaskType NullMask = JSVAL_NULL_MASK; static const MaskType NonFunObjMask = JSVAL_NONFUNOBJ_MASK; static const MaskType FunObjMask = JSVAL_FUNOBJ_MASK; static const MaskType ObjectMask = NonFunObjMask | FunObjMask; MaskType mask; JSObject *obj; private: friend class Value; explicit ObjPtr(MaskType m, JSObject *o) : mask(m), obj(o) {} public: /* Constructors */ ObjPtr() { /* N.B. mask and obj are undefined */ } ObjPtr(NullTag) { mask = NullMask; obj = NULL; } ObjPtr(FunObjTag arg) { JS_ASSERT(JS_ObjectIsFunction(NULL, &arg.obj)); mask = FunObjMask; obj = &arg.obj; } ObjPtr(FunObjOrNull arg) { JS_ASSERT_IF(arg.obj, JS_ObjectIsFunction(NULL, arg.obj)); mask = arg.obj ? FunObjMask : NullMask; obj = arg.obj; } ObjPtr(NonFunObjTag arg) { JS_ASSERT(!JS_ObjectIsFunction(NULL, &arg.obj)); mask = NonFunObjMask; obj = &arg.obj; } ObjPtr(NonFunObjOrNull arg) { JS_ASSERT_IF(arg.obj, !JS_ObjectIsFunction(NULL, arg.obj)); mask = arg.obj ? NonFunObjMask : NullMask; obj = arg.obj; } inline ObjPtr(ObjectTag arg); inline ObjPtr(ObjectOrNullTag arg); /* Accessors */ bool isNull() const { return mask == NullMask; } bool isFunObj() const { return mask == FunObjMask; } JSObject &asFunObj() const { JS_ASSERT(isFunObj()); return *obj; } bool isNonFunObj() const { return mask == NonFunObjMask; } JSObject &asNonFunObj() const { JS_ASSERT(isNonFunObj()); return *obj; } bool isObject() const { JS_ASSERT((mask != NullMask) == bool(mask & ObjectMask)); return mask != NullMask; } operator JSObject *() const { return obj; } JSObject *operator->() const { JS_ASSERT(isObject()); return obj; } JSObject &operator*() const { JS_ASSERT(isObject()); return *obj; } /* Assignment */ void setNull() { mask = NullMask; obj = NULL; } void setFunObj(JSObject &arg) { JS_ASSERT(JS_ObjectIsFunction(NULL, &arg)); mask = FunObjMask; obj = &arg; } void setFunObjOrNull(JSObject *arg) { JS_ASSERT_IF(arg, JS_ObjectIsFunction(NULL, arg)); mask = arg ? FunObjMask : NullMask; obj = arg; } void setNonFunObj(JSObject &arg) { JS_ASSERT(!JS_ObjectIsFunction(NULL, &arg)); mask = NonFunObjMask; obj = &arg; } void setNonFunObjOrNull(JSObject *arg) { JS_ASSERT_IF(arg, !JS_ObjectIsFunction(NULL, arg)); mask = arg ? NonFunObjMask : NullMask; obj = arg; } inline void setObject(JSObject &arg); inline void setObjectOrNull(JSObject *arg); }; inline bool operator==(ObjPtr lhs, ObjPtr rhs) { return lhs == rhs; } inline bool operator==(ObjPtr lhs, JSObject *rhs) { return lhs == rhs; } inline bool operator==(JSObject *lhs, ObjPtr rhs) { return lhs == rhs; } inline bool operator!=(ObjPtr lhs, ObjPtr rhs) { return !(lhs == rhs); } inline bool operator!=(ObjPtr lhs, JSObject *rhs) { return !(lhs == rhs); } inline bool operator!=(JSObject *lhs, ObjPtr rhs) { return !(lhs == rhs); } class CopyableValue; /* * While there is a single representation for values, there are two declared * types for dealing with these values: jsval and js::Value. jsval allows a * high-degree of source compatibility with the old word-sized boxed value * representation. js::Value is a new C++-only type and more accurately * reflects the current, unboxed value representation. As these two types are * layout-compatible, pointers to jsval and js::Value are interchangeable and * may be cast safely and canonically using js::Jsvalify and js::asValue. */ class Value { /* * Generally, we'd like to keep the exact representation encapsulated so * that it may be tweaked in the future. Engine internals that need to * break this encapsulation should be listed as friends below. Also see * uses of public jsval members in jsapi.h/jspubtd.h. */ friend bool StrictlyEqual(JSContext *, const Value &, const Value &); friend bool Interpret(JSContext *); /* grep "value representation" */ friend bool PrimitiveThisTest(JSFunction *, const Value &); friend class PrimitiveValue; protected: /* Type masks */ typedef JSValueMaskType MaskType; static const MaskType NullMask = JSVAL_NULL_MASK; static const MaskType UndefinedMask = JSVAL_UNDEFINED_MASK; static const MaskType Int32Mask = JSVAL_INT32_MASK; static const MaskType DoubleMask = JSVAL_DOUBLE_MASK; static const MaskType StringMask = JSVAL_STRING_MASK; static const MaskType NonFunObjMask = JSVAL_NONFUNOBJ_MASK; static const MaskType FunObjMask = JSVAL_FUNOBJ_MASK; static const MaskType BooleanMask = JSVAL_BOOLEAN_MASK; static const MaskType MagicMask = JSVAL_MAGIC_MASK; /* Standard collections of types. */ static const MaskType NumberMask = Int32Mask | DoubleMask; static const MaskType ObjectMask = NonFunObjMask | FunObjMask; static const MaskType GCThingMask = ObjectMask | StringMask; static bool isSingleton(MaskType m) { return !(m & ~UndefinedMask); } static bool isObjectOrNull(MaskType m) { return !(m & ~ObjectMask); } union Data { int32 i32; uint32 u32; double dbl; JSString *str; JSObject *obj; void *ptr; JSBool boo; #ifdef DEBUG JSWhyMagic why; #endif struct { int32 first; int32 second; } bits; }; MaskType mask; JS_INSERT_VALUE_PADDING() Data data; friend class AssertLayoutCompatible; /* * To copy, use explicit copy(). * * XXX This may be made public later, right now its just being used to * identify unnecessary copying. */ Value &operator=(const Value &); public: /* Constructors */ Value() { /* N.B. mask and data are undefined. */ } Value(NullTag) { mask = NullMask; data.obj = NULL; } Value(UndefinedTag) { mask = UndefinedMask; /* N.B. data is undefined */ } Value(Int32Tag arg) { mask = Int32Mask; data.i32 = arg.i32; } Value(DoubleTag arg) { mask = DoubleMask; data.dbl = arg.dbl; } inline Value(NumberTag arg); Value(JSString *arg) { mask = StringMask; data.str = arg; } Value(FunObjTag arg) { JS_ASSERT(JS_ObjectIsFunction(NULL, &arg.obj)); mask = FunObjMask; data.obj = &arg.obj; } Value(FunObjOrNull arg) { JS_ASSERT_IF(arg.obj, JS_ObjectIsFunction(NULL, arg.obj)); mask = arg.obj ? FunObjMask : NullMask; data.obj = arg.obj; } Value(FunObjOrUndefinedTag arg) { JS_ASSERT_IF(arg.obj, JS_ObjectIsFunction(NULL, arg.obj)); mask = arg.obj ? FunObjMask : UndefinedMask; data.obj = arg.obj; } Value(NonFunObjTag arg) { JS_ASSERT(JS_ObjectIsFunction(NULL, &arg.obj)); mask = NonFunObjMask; data.obj = &arg.obj; } Value(NonFunObjOrNull arg) { JS_ASSERT_IF(arg.obj, !JS_ObjectIsFunction(NULL, arg.obj)); mask = arg.obj ? NonFunObjMask : NullMask; data.obj = arg.obj; } inline Value(ObjectTag arg); inline Value(ObjectOrNullTag arg); Value(BooleanTag arg) { mask = BooleanMask; data.boo = arg.boo; } Value(JSWhyMagic arg) { mask = MagicMask; #ifdef DEBUG data.why = arg; #endif } /* XXX: 'explicit' can be removed when copying is public/implicit */ explicit Value(const Value &v) : mask(v.mask), data(v.data) {} /* XXX: can be removed when copy is implicit */ Value(const CopyableValue &); /* Mutators */ void setNull() { mask = NullMask; data.obj = NULL; } void setUndefined() { /* N.B. data is undefined. */ mask = UndefinedMask; } void setInt32(int32 i) { mask = Int32Mask; data.i32 = i; } int32_t &asInt32Ref() { JS_ASSERT(isInt32()); return data.i32; } void setDouble(double d) { JS_ASSERT(size_t(&data.dbl) % sizeof(double) == 0); mask = DoubleMask; data.dbl = d; } inline void setNumber(double d); void setNumber(uint32 ui) { if (ui > JSVAL_INT_MAX) { mask = DoubleMask; data.dbl = ui; } else { mask = Int32Mask; data.i32 = ui; } } double &asDoubleRef() { JS_ASSERT(size_t(&data.dbl) % sizeof(double) == 0); JS_ASSERT(isDouble()); return data.dbl; } void setString(JSString *str) { mask = StringMask; data.str = str; } void setFunObj(JSObject &arg) { JS_ASSERT(JS_ObjectIsFunction(NULL, &arg)); mask = FunObjMask; data.obj = &arg; } void setFunObjOrNull(JSObject *arg) { JS_ASSERT_IF(arg, JS_ObjectIsFunction(NULL, arg)); mask = arg ? FunObjMask : NullMask; data.obj = arg; } void setFunObjOrUndefined(JSObject *arg) { JS_ASSERT_IF(arg, JS_ObjectIsFunction(NULL, arg)); mask = arg ? FunObjMask : UndefinedMask; data.obj = arg; } void setNonFunObj(JSObject &arg) { JS_ASSERT(!JS_ObjectIsFunction(NULL, &arg)); mask = NonFunObjMask; data.obj = &arg; } void setNonFunObjOrNull(JSObject *arg) { JS_ASSERT_IF(arg, !JS_ObjectIsFunction(NULL, arg)); mask = arg ? NonFunObjMask : NullMask; data.obj = arg; } inline void setObject(JSObject &arg); inline void setObjectOrNull(JSObject *arg); void setBoolean(bool b) { mask = BooleanMask; data.boo = b; } void setMagic(JSWhyMagic why) { mask = MagicMask; #ifdef DEBUG data.why = why; #endif } /* Mutators */ /* XXX: to be removed when copying is implicit/public */ void copy(ObjPtr ptr) { data.obj = ptr.obj; mask = ptr.mask; } /* XXX: to be removed when copying is implicit/public */ void copy(const Value &v) { data = v.data; mask = v.mask; } void swap(Value &rhs) { MaskType m = mask; mask = rhs.mask; rhs.mask = m; Data d = data; data = rhs.data; rhs.data = d; } /* Accessors */ bool isUndefined() const { return mask == UndefinedMask; } bool isNull() const { return mask == NullMask; } bool isNullOrUndefined() const { return isSingleton(mask); } bool isInt32() const { return mask == Int32Mask; } int32 asInt32() const { JS_ASSERT(isInt32()); return data.i32; } bool isInt32(int32 i32) const { return isInt32() && data.i32 == i32; } bool isDouble() const { return mask == DoubleMask; } double asDouble() const { JS_ASSERT(size_t(&data.dbl) % sizeof(double) == 0); return data.dbl; } bool isNumber() const { return bool(mask & NumberMask); } double asNumber() const { JS_ASSERT(isNumber()); return isDouble() ? asDouble() : double(asInt32()); } bool isString() const { return mask == StringMask; } JSString *asString() const { JS_ASSERT(isString()); return data.str; } bool isNonFunObj() const { return mask == NonFunObjMask; } JSObject &asNonFunObj() const { JS_ASSERT(isNonFunObj()); return *data.obj; } bool isFunObj() const { return mask == FunObjMask; } JSObject &asFunObj() const { JS_ASSERT(isFunObj()); return *data.obj; } bool isObject() const { return bool(mask & ObjectMask); } bool isPrimitive() const { return !isObject(); } JSObject &asObject() const { JS_ASSERT(isObject()); return *data.obj; } bool isObjectOrNull() const { return isObjectOrNull(mask); } JSObject *asObjectOrNull() const { JS_ASSERT(isObjectOrNull()); return data.obj; } ObjPtr asObjPtr() const { JS_ASSERT(isObjectOrNull()); return ObjPtr(mask, data.obj); } bool isGCThing() const { return bool(mask & GCThingMask); } void *asGCThing() const { JS_ASSERT(isGCThing()); return data.ptr; } int32 traceKind() const { JS_ASSERT(isGCThing()); return mask == StringMask; } bool isBoolean() const { return mask == BooleanMask; } bool isTrue() const { return (mask == BooleanMask) & data.boo; } bool isFalse() const { return (mask == BooleanMask) & !data.boo; } bool asBoolean() const { JS_ASSERT(isBoolean()); return data.boo; } bool isMagic() const { return mask == MagicMask; } bool isMagic(JSWhyMagic why) const { JS_ASSERT_IF(mask == MagicMask, data.why == why); return isMagic(); } JSWhyMagic whyMagic() const { JS_ASSERT(mask == MagicMask); return data.why; } /* * Private API * * Private setters/getters allow the caller to read/write arbitrary types * that fit in the 64-bit payload. It is the caller's responsibility, after * storing to a value with setPrivateX to only read with getPrivateX. * Privates values are given a valid type of Int32Tag and are thus GC-safe. */ Value(PrivateVoidPtrTag arg) { mask = Int32Mask; data.ptr = arg.ptr; } void setPrivateVoidPtr(void *ptr) { mask = Int32Mask; data.ptr = ptr; } void *asPrivateVoidPtr() const { JS_ASSERT(mask == Int32Mask); return data.ptr; } void setPrivateUint32(uint32 u) { mask = Int32Mask; data.u32 = u; } uint32 asPrivateUint32() const { JS_ASSERT(mask == Int32Mask); return data.u32; } uint32 &asPrivateUint32Ref() { JS_ASSERT(mask == Int32Mask); return data.u32; } }; struct AssertLayoutCompatible { JS_STATIC_ASSERT(sizeof(jsval) == 16); JS_STATIC_ASSERT(sizeof(Value::MaskType) == 4); JS_STATIC_ASSERT(sizeof(Value::Data) == 8); JS_STATIC_ASSERT(offsetof(jsval, mask) == 0); JS_STATIC_ASSERT(offsetof(jsval, mask) == offsetof(Value, mask)); JS_STATIC_ASSERT(sizeof(Value) == sizeof(jsval)); JS_STATIC_ASSERT(sizeof(Value::Data) == sizeof(((jsval *)0)->data)); JS_STATIC_ASSERT(offsetof(Value, data) == offsetof(jsval, data)); JS_STATIC_ASSERT(sizeof(Value::MaskType) == sizeof(JSValueMaskType)); JS_STATIC_ASSERT(sizeof(Value::MaskType) == sizeof(((jsval *)0)->mask)); JS_STATIC_ASSERT(offsetof(Value, mask) == offsetof(jsval, mask)); }; /* XXX: this is a temporary hack until copying is implicit. */ struct CopyableValue : Value {}; JS_STATIC_ASSERT(sizeof(CopyableValue) == sizeof(Value)); inline CopyableValue ©able_cast(Value &v) { return static_cast(v); } inline const CopyableValue ©able_cast(const Value &v) { return static_cast(v); } JS_ALWAYS_INLINE Value::Value(const CopyableValue &v) { mask = v.mask; data = v.data; } /* * As asserted above, js::Value and jsval are layout equivalent. To provide * widespread casting, the following safe casts are provided. */ static JS_ALWAYS_INLINE jsval * Jsvalify(Value *v) { return (jsval *)v; } static JS_ALWAYS_INLINE const jsval * Jsvalify(const Value *v) { return (const jsval *)v; } static JS_ALWAYS_INLINE jsval & Jsvalify(Value &v) { return (jsval &)v; } static JS_ALWAYS_INLINE const jsval & Jsvalify(const Value &v) { return (const jsval &)v; } static JS_ALWAYS_INLINE Value * Valueify(jsval *v) { return (Value *)v; } static JS_ALWAYS_INLINE const Value * Valueify(const jsval *v) { return (const Value *)v; } static JS_ALWAYS_INLINE Value & Valueify(jsval &v) { return (Value &)v; } static JS_ALWAYS_INLINE const Value & Valueify(const jsval &v) { return (const Value &)v; } JS_ALWAYS_INLINE bool equalTypeAndPayload(const Value &l, const Value &r) { return EQUAL_TYPE_AND_PAYLOAD(Jsvalify(&l), Jsvalify(&r)); } /* * N.B. It is more efficient to use setNull/isNull/setUndefined/isUndefined * than to copy/compare these global values. */ extern const Value sNullValue; extern const Value sUndefinedValue; extern const ObjPtr sNullObjPtr; /* * js::Class is layout compatible and thus */ struct Class { const char *name; uint32 flags; /* Mandatory non-null function pointer members. */ PropertyOp addProperty; PropertyOp delProperty; PropertyOp getProperty; PropertyOp setProperty; JSEnumerateOp enumerate; JSResolveOp resolve; ConvertOp convert; JSFinalizeOp finalize; /* Optionally non-null members start here. */ GetObjectOps getObjectOps; CheckAccessOp checkAccess; Native call; Native construct; JSXDRObjectOp xdrObject; HasInstanceOp hasInstance; JSMarkOp mark; JSReserveSlotsOp reserveSlots; }; JS_STATIC_ASSERT(sizeof(JSClass) == sizeof(Class)); struct ExtendedClass { Class base; EqualityOp equality; JSObjectOp outerObject; JSObjectOp innerObject; JSIteratorOp iteratorObject; JSObjectOp wrappedObject; /* NB: infallible, null returns are treated as the original object */ void (*reserved0)(void); void (*reserved1)(void); void (*reserved2)(void); }; JS_STATIC_ASSERT(sizeof(JSExtendedClass) == sizeof(ExtendedClass)); static JS_ALWAYS_INLINE JSClass * Jsvalify(Class *c) { return (JSClass *)c; } static JS_ALWAYS_INLINE Class * Valueify(JSClass *c) { return (Class *)c; } static JS_ALWAYS_INLINE JSExtendedClass * Jsvalify(ExtendedClass *c) { return (JSExtendedClass *)c; } static JS_ALWAYS_INLINE ExtendedClass * Valueify(JSExtendedClass *c) { return (ExtendedClass *)c; } } /* namespace js */ #endif /* __cplusplus */ #endif /* jsapi_h___ */