jsapi.c

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}

JS_PUBLIC_API(JSContext *)
JS_ContextIterator(JSRuntime *rt, JSContext **iterp)
{
    return js_ContextIterator(rt, JS_TRUE, iterp);
}

JS_PUBLIC_API(JSVersion)
JS_GetVersion(JSContext *cx)
{
    return cx->version;
}

JS_PUBLIC_API(JSVersion)
JS_SetVersion(JSContext *cx, JSVersion version)
{
    JSVersion oldVersion;

    oldVersion = cx->version;
    if (version == oldVersion)
        return oldVersion;

    cx->version = version;

#if !JS_BUG_FALLIBLE_EQOPS
    if (cx->version == JSVERSION_1_2) {
        cx->jsop_eq = JSOP_NEW_EQ;
        cx->jsop_ne = JSOP_NEW_NE;
    } else {
        cx->jsop_eq = JSOP_EQ;
        cx->jsop_ne = JSOP_NE;
    }
#endif /* !JS_BUG_FALLIBLE_EQOPS */

    return oldVersion;
}

static struct v2smap {
    JSVersion   version;
    const char  *string;
} v2smap[] = {
    {JSVERSION_1_0,     "1.0"},
    {JSVERSION_1_1,     "1.1"},
    {JSVERSION_1_2,     "1.2"},
    {JSVERSION_1_3,     "1.3"},
    {JSVERSION_1_4,     "1.4"},
    {JSVERSION_ECMA_3,  "ECMAv3"},
    {JSVERSION_1_5,     "1.5"},
    {JSVERSION_DEFAULT, "default"},
    {JSVERSION_UNKNOWN, NULL},          /* must be last, NULL is sentinel */
};

JS_PUBLIC_API(const char *)
JS_VersionToString(JSVersion version)
{
    int i;

    for (i = 0; v2smap[i].string; i++)
        if (v2smap[i].version == version)
            return v2smap[i].string;
    return "unknown";
}

JS_PUBLIC_API(JSVersion)
JS_StringToVersion(const char *string)
{
    int i;

    for (i = 0; v2smap[i].string; i++)
        if (strcmp(v2smap[i].string, string) == 0)
            return v2smap[i].version;
    return JSVERSION_UNKNOWN;
}

JS_PUBLIC_API(uint32)
JS_GetOptions(JSContext *cx)
{
    return cx->options;
}

JS_PUBLIC_API(uint32)
JS_SetOptions(JSContext *cx, uint32 options)
{
    uint32 oldopts = cx->options;
    cx->options = options;
    return oldopts;
}

JS_PUBLIC_API(uint32)
JS_ToggleOptions(JSContext *cx, uint32 options)
{
    uint32 oldopts = cx->options;
    cx->options ^= options;
    return oldopts;
}

JS_PUBLIC_API(const char *)
JS_GetImplementationVersion(void)
{
    return "JavaScript-C 1.5 pre-release 6 2004-01-27";
}


JS_PUBLIC_API(JSObject *)
JS_GetGlobalObject(JSContext *cx)
{
    return cx->globalObject;
}

JS_PUBLIC_API(void)
JS_SetGlobalObject(JSContext *cx, JSObject *obj)
{
    cx->globalObject = obj;
}

static JSObject *
InitFunctionAndObjectClasses(JSContext *cx, JSObject *obj)
{
    JSDHashTable *table;
    JSBool resolving;
    JSRuntime *rt;
    JSResolvingKey key;
    JSResolvingEntry *entry;
    JSObject *fun_proto, *obj_proto;

    /* If cx has no global object, use obj so prototypes can be found. */
    if (!cx->globalObject)
        cx->globalObject = obj;

    /* Record Function and Object in cx->resolvingTable, if we are resolving. */
    table = cx->resolvingTable;
    resolving = (table && table->entryCount);
    if (resolving) {
        rt = cx->runtime;
        key.obj = obj;
        key.id = (jsid) rt->atomState.FunctionAtom;
        entry = (JSResolvingEntry *)
                JS_DHashTableOperate(table, &key, JS_DHASH_ADD);
        if (entry && entry->key.obj && (entry->flags & JSRESFLAG_LOOKUP)) {
            /* Already resolving Function, record Object too. */
            JS_ASSERT(entry->key.obj == obj);
            key.id = (jsid) rt->atomState.ObjectAtom;
            entry = (JSResolvingEntry *)
                    JS_DHashTableOperate(table, &key, JS_DHASH_ADD);
        }
        if (!entry) {
            JS_ReportOutOfMemory(cx);
            return NULL;
        }
        JS_ASSERT(!entry->key.obj && entry->flags == 0);
        entry->key = key;
        entry->flags = JSRESFLAG_LOOKUP;
    }

    /* Initialize the function class first so constructors can be made. */
    fun_proto = js_InitFunctionClass(cx, obj);
    if (!fun_proto)
        goto out;

    /* Initialize the object class next so Object.prototype works. */
    obj_proto = js_InitObjectClass(cx, obj);
    if (!obj_proto) {
        fun_proto = NULL;
        goto out;
    }

    /* Function.prototype and the global object delegate to Object.prototype. */
    OBJ_SET_PROTO(cx, fun_proto, obj_proto);
    if (!OBJ_GET_PROTO(cx, obj))
        OBJ_SET_PROTO(cx, obj, obj_proto);

out:
    /* If resolving, remove the other entry (Object or Function) from table. */
    if (resolving)
        JS_DHashTableOperate(table, &key, JS_DHASH_REMOVE);
    return fun_proto;
}

JS_PUBLIC_API(JSBool)
JS_InitStandardClasses(JSContext *cx, JSObject *obj)
{
    CHECK_REQUEST(cx);

#if JS_HAS_UNDEFINED
{
    /* Define a top-level property 'undefined' with the undefined value. */
    JSAtom *atom = cx->runtime->atomState.typeAtoms[JSTYPE_VOID];
    if (!OBJ_DEFINE_PROPERTY(cx, obj, (jsid)atom, JSVAL_VOID, NULL, NULL,
                             JSPROP_PERMANENT, NULL)) {
        return JS_FALSE;
    }
}
#endif

    /* Function and Object require cooperative bootstrapping magic. */
    if (!InitFunctionAndObjectClasses(cx, obj))
        return JS_FALSE;

    /* Initialize the rest of the standard objects and functions. */
    return js_InitArrayClass(cx, obj) &&
           js_InitBooleanClass(cx, obj) &&
           js_InitMathClass(cx, obj) &&
           js_InitNumberClass(cx, obj) &&
           js_InitStringClass(cx, obj) &&
#if JS_HAS_CALL_OBJECT
           js_InitCallClass(cx, obj) &&
#endif
#if JS_HAS_REGEXPS
           js_InitRegExpClass(cx, obj) &&
#endif
#if JS_HAS_SCRIPT_OBJECT
           js_InitScriptClass(cx, obj) &&
#endif
#if JS_HAS_ERROR_EXCEPTIONS
           js_InitExceptionClasses(cx, obj) &&
#endif
#if JS_HAS_FILE_OBJECT
           js_InitFileClass(cx, obj, JS_TRUE) &&
#endif
           js_InitDateClass(cx, obj);
}

#define ATOM_OFFSET(name)       offsetof(JSAtomState, name##Atom)
#define OFFSET_TO_ATOM(rt,off)  (*(JSAtom **)((char*)&(rt)->atomState + (off)))

/*
 * Table of class initializers and their atom offsets in rt->atomState.
 * If you add a "standard" class, remember to update this table.
 */
static struct {
    JSObjectOp  init;
    size_t      atomOffset;
} standard_class_atoms[] = {
    {InitFunctionAndObjectClasses,  ATOM_OFFSET(Function)},
    {InitFunctionAndObjectClasses,  ATOM_OFFSET(Object)},
    {js_InitArrayClass,             ATOM_OFFSET(Array)},
    {js_InitBooleanClass,           ATOM_OFFSET(Boolean)},
    {js_InitDateClass,              ATOM_OFFSET(Date)},
    {js_InitMathClass,              ATOM_OFFSET(Math)},
    {js_InitNumberClass,            ATOM_OFFSET(Number)},
    {js_InitStringClass,            ATOM_OFFSET(String)},
#if JS_HAS_CALL_OBJECT
    {js_InitCallClass,              ATOM_OFFSET(Call)},
#endif
#if JS_HAS_ERROR_EXCEPTIONS
    {js_InitExceptionClasses,       ATOM_OFFSET(Error)},
#endif
#if JS_HAS_REGEXPS
    {js_InitRegExpClass,            ATOM_OFFSET(RegExp)},
#endif
#if JS_HAS_SCRIPT_OBJECT
    {js_InitScriptClass,            ATOM_OFFSET(Script)},
#endif
    {NULL,                          0}
};

/*
 * Table of top-level function and constant names and their init functions.
 * If you add a "standard" global function or property, remember to update
 * this table.
 */
typedef struct JSStdName {
    JSObjectOp  init;
    size_t      atomOffset;     /* offset of atom pointer in JSAtomState */
    const char  *name;          /* null if atom is pre-pinned, else name */
} JSStdName;

static JSAtom *
StdNameToAtom(JSContext *cx, JSStdName *stdn)
{
    size_t offset;
    JSAtom *atom;
    const char *name;

    offset = stdn->atomOffset;
    atom = OFFSET_TO_ATOM(cx->runtime, offset);
    if (!atom) {
        name = stdn->name;
        if (name) {
            atom = js_Atomize(cx, name, strlen(name), ATOM_PINNED);
            OFFSET_TO_ATOM(cx->runtime, offset) = atom;
        }
    }
    return atom;
}

#define EAGERLY_PINNED_ATOM(name)   ATOM_OFFSET(name), NULL
#define LAZILY_PINNED_ATOM(name)    ATOM_OFFSET(lazy.name), js_##name##_str

static JSStdName standard_class_names[] = {
    /* ECMA requires that eval be a direct property of the global object. */
    {js_InitObjectClass,        EAGERLY_PINNED_ATOM(eval)},

    /* Global properties and functions defined by the Number class. */
    {js_InitNumberClass,        LAZILY_PINNED_ATOM(NaN)},
    {js_InitNumberClass,        LAZILY_PINNED_ATOM(Infinity)},
    {js_InitNumberClass,        LAZILY_PINNED_ATOM(isNaN)},
    {js_InitNumberClass,        LAZILY_PINNED_ATOM(isFinite)},
    {js_InitNumberClass,        LAZILY_PINNED_ATOM(parseFloat)},
    {js_InitNumberClass,        LAZILY_PINNED_ATOM(parseInt)},

    /* String global functions. */
    {js_InitStringClass,        LAZILY_PINNED_ATOM(escape)},
    {js_InitStringClass,        LAZILY_PINNED_ATOM(unescape)},
    {js_InitStringClass,        LAZILY_PINNED_ATOM(decodeURI)},
    {js_InitStringClass,        LAZILY_PINNED_ATOM(encodeURI)},
    {js_InitStringClass,        LAZILY_PINNED_ATOM(decodeURIComponent)},
    {js_InitStringClass,        LAZILY_PINNED_ATOM(encodeURIComponent)},
#if JS_HAS_UNEVAL
    {js_InitStringClass,        LAZILY_PINNED_ATOM(uneval)},
#endif

    /* Exception constructors. */
#if JS_HAS_ERROR_EXCEPTIONS
    {js_InitExceptionClasses,   EAGERLY_PINNED_ATOM(Error)},
    {js_InitExceptionClasses,   LAZILY_PINNED_ATOM(InternalError)},
    {js_InitExceptionClasses,   LAZILY_PINNED_ATOM(EvalError)},
    {js_InitExceptionClasses,   LAZILY_PINNED_ATOM(RangeError)},
    {js_InitExceptionClasses,   LAZILY_PINNED_ATOM(ReferenceError)},
    {js_InitExceptionClasses,   LAZILY_PINNED_ATOM(SyntaxError)},
    {js_InitExceptionClasses,   LAZILY_PINNED_ATOM(TypeError)},
    {js_InitExceptionClasses,   LAZILY_PINNED_ATOM(URIError)},
#endif

    {NULL,                      0, NULL}
};

static JSStdName object_prototype_names[] = {
    /* Object.prototype properties (global delegates to Object.prototype). */
    {js_InitObjectClass,        EAGERLY_PINNED_ATOM(proto)},
    {js_InitObjectClass,        EAGERLY_PINNED_ATOM(parent)},
    {js_InitObjectClass,        EAGERLY_PINNED_ATOM(count)},
#if JS_HAS_TOSOURCE
    {js_InitObjectClass,        EAGERLY_PINNED_ATOM(toSource)},
#endif
    {js_InitObjectClass,        EAGERLY_PINNED_ATOM(toString)},
    {js_InitObjectClass,        EAGERLY_PINNED_ATOM(toLocaleString)},
    {js_InitObjectClass,        EAGERLY_PINNED_ATOM(valueOf)},
#if JS_HAS_OBJ_WATCHPOINT
    {js_InitObjectClass,        LAZILY_PINNED_ATOM(watch)},
    {js_InitObjectClass,        LAZILY_PINNED_ATOM(unwatch)},
#endif
#if JS_HAS_NEW_OBJ_METHODS
    {js_InitObjectClass,        LAZILY_PINNED_ATOM(hasOwnProperty)},
    {js_InitObjectClass,        LAZILY_PINNED_ATOM(isPrototypeOf)},
    {js_InitObjectClass,        LAZILY_PINNED_ATOM(propertyIsEnumerable)},
#endif
#if JS_HAS_GETTER_SETTER
    {js_InitObjectClass,        LAZILY_PINNED_ATOM(defineGetter)},
    {js_InitObjectClass,        LAZILY_PINNED_ATOM(defineSetter)},
    {js_InitObjectClass,        LAZILY_PINNED_ATOM(lookupGetter)},
    {js_InitObjectClass,        LAZILY_PINNED_ATOM(lookupSetter)},
#endif

    {NULL,                      0, NULL}
};

#undef EAGERLY_PINNED_ATOM
#undef LAZILY_PINNED_ATOM

JS_PUBLIC_API(JSBool)
JS_ResolveStandardClass(JSContext *cx, JSObject *obj, jsval id,
                        JSBool *resolved)
{
    JSString *idstr;
    JSRuntime *rt;
    JSAtom *atom;
    JSObjectOp init;
    uintN i;

    CHECK_REQUEST(cx);
    *resolved = JS_FALSE;

    if (!JSVAL_IS_STRING(id))
        return JS_TRUE;
    idstr = JSVAL_TO_STRING(id);
    rt = cx->runtime;

#if JS_HAS_UNDEFINED
    /* See if we're resolving 'undefined', and define it if so. */
    atom = rt->atomState.typeAtoms[JSTYPE_VOID];
    if (idstr == ATOM_TO_STRING(atom)) {
        *resolved = JS_TRUE;
        return OBJ_DEFINE_PROPERTY(cx, obj, (jsid)atom, JSVAL_VOID, NULL, NULL,
                                   JSPROP_PERMANENT, NULL);
    }
#endif

    /* Try for class constructors/prototypes named by well-known atoms. */
    init = NULL;
    for (i = 0; standard_class_atoms[i].init; i++) {
        atom = OFFSET_TO_ATOM(rt, standard_class_atoms[i].atomOffset);
        if (idstr == ATOM_TO_STRING(atom)) {
            init = standard_class_atoms[i].init;
            break;
        }
    }

    if (!init) {
        /* Try less frequently used top-level functions and constants. */
        for (i = 0; standard_class_names[i].init; i++) {
            atom = StdNameToAtom(cx, &standard_class_names[i]);
            if (!atom)
                return JS_FALSE;
            if (idstr == ATOM_TO_STRING(atom)) {
                init = standard_class_names[i].init;
                break;
            }
        }

        if (!init && !OBJ_GET_PROTO(cx, obj)) {
            /*
             * Try even less frequently used names delegated from the global
             * object to Object.prototype, but only if the Object class hasn't
             * yet been initialized.
             */
            for (i = 0; object_prototype_names[i].init; i++) {
                atom = StdNameToAtom(cx, &object_prototype_names[i]);
                if (!atom)
                    return JS_FALSE;
                if (idstr == ATOM_TO_STRING(atom)) {
                    init = standard_class_names[i].init;
                    break;
                }
            }
        }
    }

    if (init) {
        if (!init(cx, obj))
            return JS_FALSE;
        *resolved = JS_TRUE;
    }
    return JS_TRUE;
}

static JSBool
HasOwnProperty(JSContext *cx, JSObject *obj, JSAtom *atom, JSBool *ownp)
{
    JSObject *pobj;
    JSProperty *prop;

    if (!OBJ_LOOKUP_PROPERTY(cx, obj, (jsid)atom, &pobj, &prop))
        return JS_FALSE;
    if (prop)
        OBJ_DROP_PROPERTY(cx, pobj, prop);
    *ownp = (pobj == obj && prop);
    return JS_TRUE;
}

JS_PUBLIC_API(JSBool)
JS_EnumerateStandardClasses(JSContext *cx, JSObject *obj)
{
    JSRuntime *rt;
    JSAtom *atom;
    JSBool found;
    uintN i;

    CHECK_REQUEST(cx);
    rt = cx->runtime;

#if JS_HAS_UNDEFINED
    /* See if we need to bind 'undefined' and define it if so. */
    atom = rt->atomState.typeAtoms[JSTYPE_VOID];
    if (!HasOwnProperty(cx, obj, atom, &found))
        return JS_FALSE;
    if (!found &&
        !OBJ_DEFINE_PROPERTY(cx, obj, (jsid)atom, JSVAL_VOID, NULL, NULL,
                            JSPROP_PERMANENT, NULL)) {
        return JS_FALSE;
    }
#endif

    /* Initialize any classes that have not been resolved yet. */
    for (i = 0; standard_class_atoms[i].init; i++) {
        atom = OFFSET_TO_ATOM(rt, standard_class_atoms[i].atomOffset);
        if (!HasOwnProperty(cx, obj, atom, &found))
            return JS_FALSE;
        if (!found && !standard_class_atoms[i].init(cx, obj))
            return JS_FALSE;
    }