jsapi.c

java script test programing source code

    jsrefcount saveDepth = cx->requestDepth;

    while (cx->requestDepth)
        JS_EndRequest(cx);
    return saveDepth;
}

JS_PUBLIC_API(void)
JS_ResumeRequest(JSContext *cx, jsrefcount saveDepth)
{
    JS_ASSERT(!cx->requestDepth);
    while (--saveDepth >= 0)
        JS_BeginRequest(cx);
}

#endif /* JS_THREADSAFE */

JS_PUBLIC_API(void)
JS_Lock(JSRuntime *rt)
{
    JS_LOCK_RUNTIME(rt);
}

JS_PUBLIC_API(void)
JS_Unlock(JSRuntime *rt)
{
    JS_UNLOCK_RUNTIME(rt);
}

JS_PUBLIC_API(JSContextCallback)
JS_SetContextCallback(JSRuntime *rt, JSContextCallback cxCallback)
{
    JSContextCallback old;

    old = rt->cxCallback;
    rt->cxCallback = cxCallback;
    return old;
}

JS_PUBLIC_API(JSContext *)
JS_NewContext(JSRuntime *rt, size_t stackChunkSize)
{
    return js_NewContext(rt, stackChunkSize);
}

JS_PUBLIC_API(void)
JS_DestroyContext(JSContext *cx)
{
    js_DestroyContext(cx, JSDCM_FORCE_GC);
}

JS_PUBLIC_API(void)
JS_DestroyContextNoGC(JSContext *cx)
{
    js_DestroyContext(cx, JSDCM_NO_GC);
}

JS_PUBLIC_API(void)
JS_DestroyContextMaybeGC(JSContext *cx)
{
    js_DestroyContext(cx, JSDCM_MAYBE_GC);
}

JS_PUBLIC_API(void *)
JS_GetContextPrivate(JSContext *cx)
{
    return cx->data;
}

JS_PUBLIC_API(void)
JS_SetContextPrivate(JSContext *cx, void *data)
{
    cx->data = data;
}

JS_PUBLIC_API(JSRuntime *)
JS_GetRuntime(JSContext *cx)
{
    return cx->runtime;
}

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 & JSVERSION_MASK;
}

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

    JS_ASSERT(version != JSVERSION_UNKNOWN);
    JS_ASSERT((version & ~JSVERSION_MASK) == 0);

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

    /* We no longer support 1.4 or below. */
    if (version != JSVERSION_DEFAULT && version <= JSVERSION_1_4)
        return oldVersion;

    cx->version = (cx->version & ~JSVERSION_MASK) | version;
    js_OnVersionChange(cx);
    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_1_6,     "1.6"},
    {JSVERSION_1_7,     "1.7"},
    {JSVERSION_DEFAULT, js_default_str},
    {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;
}

#define SYNC_OPTIONS_TO_VERSION(cx)                                           \
    JS_BEGIN_MACRO                                                            \
        if ((cx)->options & JSOPTION_XML)                                     \
            (cx)->version |= JSVERSION_HAS_XML;                               \
        else                                                                  \
            (cx)->version &= ~JSVERSION_HAS_XML;                              \
    JS_END_MACRO

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

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

JS_PUBLIC_API(const char *)
JS_GetImplementationVersion(void)
{
    return "JavaScript-C 1.7.0 2007-10-03";
}


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

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

#if JS_HAS_XML_SUPPORT
    cx->xmlSettingFlags = 0;
#endif
}

JSObject *
js_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)
        JS_SetGlobalObject(cx, obj);

    /* Record Function and Object in cx->resolvingTable, if we are resolving. */
    table = cx->resolvingTable;
    resolving = (table && table->entryCount);
    rt = cx->runtime;
    key.obj = obj;
    if (resolving) {
        key.id = ATOM_TO_JSID(rt->atomState.classAtoms[JSProto_Function]);
        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 = ATOM_TO_JSID(rt->atomState.classAtoms[JSProto_Object]);
            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;
    } else {
        key.id = ATOM_TO_JSID(rt->atomState.classAtoms[JSProto_Object]);
        if (!js_StartResolving(cx, &key, JSRESFLAG_LOOKUP, &entry))
            return NULL;

        key.id = ATOM_TO_JSID(rt->atomState.classAtoms[JSProto_Function]);
        if (!js_StartResolving(cx, &key, JSRESFLAG_LOOKUP, &entry)) {
            key.id = ATOM_TO_JSID(rt->atomState.classAtoms[JSProto_Object]);
            JS_DHashTableOperate(table, &key, JS_DHASH_REMOVE);
            return NULL;
        }

        table = cx->resolvingTable;
    }

    /* 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. */
    JS_DHashTableOperate(table, &key, JS_DHASH_REMOVE);
    if (!resolving) {
        /* If not resolving, remove the first entry added above, for Object. */
        JS_ASSERT(key.id ==                                                   \
                  ATOM_TO_JSID(rt->atomState.classAtoms[JSProto_Function]));
        key.id = ATOM_TO_JSID(rt->atomState.classAtoms[JSProto_Object]);
        JS_DHashTableOperate(table, &key, JS_DHASH_REMOVE);
    }
    return fun_proto;
}

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

    CHECK_REQUEST(cx);

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

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

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

#define ATOM_OFFSET(name)       offsetof(JSAtomState,name##Atom)
#define CLASS_ATOM_OFFSET(name) offsetof(JSAtomState,classAtoms[JSProto_##name])
#define OFFSET_TO_ATOM(rt,off)  (*(JSAtom **)((char*)&(rt)->atomState + (off)))
#define CLASP(name)             (JSClass *)&js_##name##Class

#define EAGER_ATOM(name)            ATOM_OFFSET(name), NULL
#define EAGER_CLASS_ATOM(name)      CLASS_ATOM_OFFSET(name), NULL
#define EAGER_ATOM_AND_CLASP(name)  EAGER_CLASS_ATOM(name), CLASP(name)
#define LAZY_ATOM(name)             ATOM_OFFSET(lazy.name), js_##name##_str

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 */
    JSClass     *clasp;
} 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;
}

/*
 * Table of class initializers and their atom offsets in rt->atomState.
 * If you add a "standard" class, remember to update this table.
 */
static JSStdName standard_class_atoms[] = {
    {js_InitFunctionAndObjectClasses,   EAGER_ATOM_AND_CLASP(Function)},
    {js_InitFunctionAndObjectClasses,   EAGER_ATOM_AND_CLASP(Object)},
    {js_InitArrayClass,                 EAGER_ATOM_AND_CLASP(Array)},
    {js_InitBlockClass,                 EAGER_ATOM_AND_CLASP(Block)},
    {js_InitBooleanClass,               EAGER_ATOM_AND_CLASP(Boolean)},
    {js_InitDateClass,                  EAGER_ATOM_AND_CLASP(Date)},
    {js_InitMathClass,                  EAGER_ATOM_AND_CLASP(Math)},
    {js_InitNumberClass,                EAGER_ATOM_AND_CLASP(Number)},
    {js_InitStringClass,                EAGER_ATOM_AND_CLASP(String)},
    {js_InitCallClass,                  EAGER_ATOM_AND_CLASP(Call)},
    {js_InitExceptionClasses,           EAGER_ATOM_AND_CLASP(Error)},
    {js_InitRegExpClass,                EAGER_ATOM_AND_CLASP(RegExp)},
#if JS_HAS_SCRIPT_OBJECT
    {js_InitScriptClass,                EAGER_ATOM_AND_CLASP(Script)},
#endif
#if JS_HAS_XML_SUPPORT
    {js_InitXMLClass,                   EAGER_ATOM_AND_CLASP(XML)},
    {js_InitNamespaceClass,             EAGER_ATOM_AND_CLASP(Namespace)},
    {js_InitQNameClass,                 EAGER_ATOM_AND_CLASP(QName)},
#endif
#if JS_HAS_FILE_OBJECT
    {js_InitFileClass,                  EAGER_ATOM_AND_CLASP(File)},
#endif
#if JS_HAS_GENERATORS
    {js_InitIteratorClasses,            EAGER_ATOM_AND_CLASP(StopIteration)},
#endif
    {NULL,                              0, NULL, NULL}
};

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

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

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

    /* Exception constructors. */
    {js_InitExceptionClasses,   EAGER_CLASS_ATOM(Error), CLASP(Error)},
    {js_InitExceptionClasses,   EAGER_CLASS_ATOM(InternalError), CLASP(Error)},
    {js_InitExceptionClasses,   EAGER_CLASS_ATOM(EvalError), CLASP(Error)},
    {js_InitExceptionClasses,   EAGER_CLASS_ATOM(RangeError), CLASP(Error)},
    {js_InitExceptionClasses,   EAGER_CLASS_ATOM(ReferenceError), CLASP(Error)},
    {js_InitExceptionClasses,   EAGER_CLASS_ATOM(SyntaxError), CLASP(Error)},
    {js_InitExceptionClasses,   EAGER_CLASS_ATOM(TypeError), CLASP(Error)},
    {js_InitExceptionClasses,   EAGER_CLASS_ATOM(URIError), CLASP(Error)},

#if JS_HAS_XML_SUPPORT
    {js_InitAnyNameClass,       EAGER_ATOM_AND_CLASP(AnyName)},
    {js_InitAttributeNameClass, EAGER_ATOM_AND_CLASP(AttributeName)},
    {js_InitXMLClass,           LAZY_ATOM(XMLList), &js_XMLClass},
    {js_InitXMLClass,           LAZY_ATOM(isXMLName), NULL},
#endif

#if JS_HAS_GENERATORS
    {js_InitIteratorClasses,    EAGER_ATOM_AND_CLASP(Iterator)},
    {js_InitIteratorClasses,    EAGER_ATOM_AND_CLASP(Generator)},
#endif

    {NULL,                      0, NULL, NULL}
};

static JSStdName object_prototype_names[] = {
    /* Object.prototype properties (global delegates to Object.prototype). */
    {js_InitObjectClass,        EAGER_ATOM(proto), NULL},
    {js_InitObjectClass,        EAGER_ATOM(parent), NULL},