C++ STRING_TO_JSVAL函数代码示例

static JSBool jwindow_dialog(JSContext *cx, JSObject *obj,uintN argc, jsval *argv, jsval *rval, int which_dialogue)
{
	WebcJSDocumentContext *jsmgr = (WebcJSDocumentContext *) jhutil_GetPrivate(cx, obj);
	HTMLDocument *pDoc = (jsmgr)? jsmgr->GetDocument() : 0;

	if (argc < 1)
        return(JS_FALSE);

    char *prompt_str = JS_GetStringBytes(JS_ValueToString(cx, argv[0]));
// << EDIT 20080120 - Needs work

	// Clone the graphics abstraction layer function pointers so we know who to call
	HTMLBrowserConfig config, docConfig;
    rtp_memset(&config, 0, sizeof(config));
    rtp_memset(&docConfig, 0, sizeof(docConfig));
	pDoc->GetBrowser()->GetConfig(&docConfig);
	config.graphics = docConfig.graphics;

    switch (which_dialogue) {
        case WHICH_DIALOGUE_ALERT:
            config.WindowConfig.left =   WEBC_SKIN_ALERT_LEFT;
            config.WindowConfig.top =    WEBC_SKIN_ALERT_TOP;
            config.WindowConfig.width =  WEBC_SKIN_ALERT_WIDTH;
            config.WindowConfig.height = WEBC_SKIN_ALERT_HEIGHT;
            break;
        case WHICH_DIALOGUE_PROMPT:
            config.WindowConfig.left =   WEBC_SKIN_PROMPT_LEFT;
            config.WindowConfig.top =    WEBC_SKIN_PROMPT_TOP;
            config.WindowConfig.width =  WEBC_SKIN_PROMPT_WIDTH;
            config.WindowConfig.height = WEBC_SKIN_PROMPT_HEIGHT;
            break;
        case WHICH_DIALOGUE_CONFIRM:
        default:
            config.WindowConfig.left =   WEBC_SKIN_CONFIRM_LEFT;
            config.WindowConfig.top =    WEBC_SKIN_CONFIRM_TOP;
            config.WindowConfig.width =  WEBC_SKIN_CONFIRM_WIDTH;
            config.WindowConfig.height = WEBC_SKIN_CONFIRM_HEIGHT;
            break;
    }
	config.WindowConfig.WindowFlags |= WF_MODAL;

    HBROWSER_HANDLE Browser = webc_CreateBrowser(&config,  WEBC_TRUE,"dialog", "");
    if (Browser)
    {
     HDOC_HANDLE hDoc = webc_BrowserGetDocument(Browser);
	 wcCtx Ctx;
     char buff[128];
	  wcCtxtInit(&Ctx, (wcBROW) Browser, (wcDOC) hDoc);
     /* Experimental */
     wcDocClear(&Ctx, wcFALSE);
     wcDocOpen(&Ctx);


     // Create a link between 'C' and Javascript the Native 'C' function PromptDismiss will
     // be called with the value of the input field.
     webc_JScriptDefineFunction(hDoc, "PromptDismiss", (JSNative) PromptDismiss, 0);
     if (which_dialogue == WHICH_DIALOGUE_ALERT)
     {
         WriteDlgLine(&Ctx, WEBC_SKIN_ALERT_SOURCE_1);
         WriteDlgLine(&Ctx, prompt_str);
         WriteDlgLine(&Ctx, WEBC_SKIN_ALERT_SOURCE_2);
         WriteDlgLine(&Ctx, WEBC_SKIN_ALERT_SOURCE_3);
     }
     else if (which_dialogue == WHICH_DIALOGUE_CONFIRM)
     {
         WriteDlgLine(&Ctx, WEBC_SKIN_CONFIRM_SOURCE_1);
         WriteDlgLine(&Ctx, prompt_str);
         WriteDlgLine(&Ctx, WEBC_SKIN_CONFIRM_SOURCE_2);
         WriteDlgLine(&Ctx, WEBC_SKIN_CONFIRM_SOURCE_3);
     }
     else if (which_dialogue == WHICH_DIALOGUE_PROMPT)
     {
         char *default_str = "";
         if (argc > 1)
             default_str = JS_GetStringBytes(JS_ValueToString(cx, argv[1]));
         WriteDlgLine(&Ctx, prompt_str);
         rtp_sprintf(&buff[0],WEBC_SKIN_PROMPT_SOURCE_1,default_str);
         WriteDlgLine(&Ctx, &buff[0]);
         WriteDlgLine(&Ctx, WEBC_SKIN_PROMPT_SOURCE_2);
         WriteDlgLine(&Ctx, WEBC_SKIN_PROMPT_SOURCE_3);
     }
     wcDocClose(&Ctx);
     wcDocRefresh(&Ctx);

     /* Go modal here */
  //   HBROWSER_HANDLE Browser = webc_CreateBrowser(&config,  WEBC_TRUE, "");
     HTMLBrowser *pBrowser = (HTMLBrowser *) Browser;
     while (pBrowser->ProcessInputQueue(WEBC_TRUE) >= 0)
     {
         WebString *user_WebString;
         void* privateData = webc_BrowserGetPrivateData(Browser);
         if (privateData)
         {
             user_WebString = (WebString *) privateData;
             if (which_dialogue == WHICH_DIALOGUE_PROMPT)
             {
                 if (user_WebString && user_WebString->getLength())
 			        *rval = STRING_TO_JSVAL(WEBC_JS_NEW_STRING_COPY_Z(cx, user_WebString->getChars()));
                 else
                     *rval = JSVAL_VOID;
//.........这里部分代码省略.........

JSAtom *
js_AtomizeString(JSContext *cx, JSString *str, uintN flags)
{
    jsval v;
    JSAtomState *state;
    JSDHashTable *table;
    JSAtomHashEntry *entry;
    JSString *key;
    uint32 gen;

    JS_ASSERT(!(flags & ~(ATOM_PINNED|ATOM_INTERNED|ATOM_TMPSTR|ATOM_NOCOPY)));
    JS_ASSERT_IF(flags & ATOM_NOCOPY, flags & ATOM_TMPSTR);

    if (str->isAtomized())
        return (JSAtom *) STRING_TO_JSVAL(str);

    size_t length = str->length();
    if (length == 1) {
        jschar c = str->chars()[0];
        if (c < UNIT_STRING_LIMIT)
            return (JSAtom *) STRING_TO_JSVAL(JSString::unitString(c));
    }

    /*
     * Here we know that JSString::intStringTable covers only 256 (or at least
     * not 1000 or more) chars. We rely on order here to resolve the unit vs.
     * int string atom identity issue by giving priority to unit strings for
     * '0' through '9' (see JSString::intString in jsstrinlines.h).
     */
    JS_STATIC_ASSERT(INT_STRING_LIMIT <= 999);
    if (2 <= length && length <= 3) {
        const jschar *chars = str->chars();

        if ('1' <= chars[0] && chars[0] <= '9' &&
            '0' <= chars[1] && chars[1] <= '9' &&
            (length == 2 || ('0' <= chars[2] && chars[2] <= '9'))) {
            jsint i = (chars[0] - '0') * 10 + chars[1] - '0';

            if (length == 3)
                i = i * 10 + chars[2] - '0'; 
            if (jsuint(i) < INT_STRING_LIMIT)
                return (JSAtom *) STRING_TO_JSVAL(JSString::intString(i));
        }
    }

    state = &cx->runtime->atomState;
    table = &state->stringAtoms;

    JS_LOCK(cx, &state->lock);
    entry = TO_ATOM_ENTRY(JS_DHashTableOperate(table, str, JS_DHASH_ADD));
    if (!entry)
        goto failed_hash_add;
    if (entry->keyAndFlags != 0) {
        key = (JSString *)ATOM_ENTRY_KEY(entry);
    } else {
        /*
         * We created a new hashtable entry. Unless str is already allocated
         * from the GC heap and flat, we have to release state->lock as
         * string construction is a complex operation. For example, it can
         * trigger GC which may rehash the table and make the entry invalid.
         */
        ++table->generation;
        if (!(flags & ATOM_TMPSTR) && str->isFlat()) {
            str->flatClearMutable();
            key = str;
        } else {
            gen = table->generation;
            JS_UNLOCK(cx, &state->lock);

            if (flags & ATOM_TMPSTR) {
                if (flags & ATOM_NOCOPY) {
                    key = js_NewString(cx, str->flatChars(), str->flatLength());
                    if (!key)
                        return NULL;

                    /* Finish handing off chars to the GC'ed key string. */
                    str->mChars = NULL;
                } else {
                    key = js_NewStringCopyN(cx, str->flatChars(), str->flatLength());
                    if (!key)
                        return NULL;
                }
           } else {
                JS_ASSERT(str->isDependent());
                if (!js_UndependString(cx, str))
                    return NULL;
                key = str;
            }

            JS_LOCK(cx, &state->lock);
            if (table->generation == gen) {
                JS_ASSERT(entry->keyAndFlags == 0);
            } else {
                entry = TO_ATOM_ENTRY(JS_DHashTableOperate(table, key,
                                                           JS_DHASH_ADD));
                if (!entry)
                    goto failed_hash_add;
                if (entry->keyAndFlags != 0) {
                    key = (JSString *)ATOM_ENTRY_KEY(entry);
                    goto finish;
//.........这里部分代码省略.........

JSDProperty*
jsd_GetValueProperty(JSDContext* jsdc, JSDValue* jsdval, JSString* name)
{
    JSContext* cx = jsdc->dumbContext;
    JSDProperty* jsdprop;
    JSDProperty* iter = NULL;
    JSObject* obj;
    uintN  attrs = 0;
    JSBool found;
    JSPropertyDesc pd;
    const jschar * nameChars;
    size_t nameLen;
    jsval val, nameval;
    jsid nameid;
    JSCrossCompartmentCall *call = NULL;

    if(!jsd_IsValueObject(jsdc, jsdval))
        return NULL;

    /* If we already have the prop, then return it */
    while(NULL != (jsdprop = jsd_IterateProperties(jsdc, jsdval, &iter)))
    {
        JSString* propName = jsd_GetValueString(jsdc, jsdprop->name);
        if(propName) {
            intN result;
            if (JS_CompareStrings(cx, propName, name, &result) && !result)
                return jsdprop;
        }
        JSD_DropProperty(jsdc, jsdprop);
    }
    /* Not found in property list, look it up explicitly */

    if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
        return NULL;

    if (!(nameChars = JS_GetStringCharsZAndLength(cx, name, &nameLen)))
        return NULL;

    JS_BeginRequest(cx);
    call = JS_EnterCrossCompartmentCall(cx, obj);
    if(!call) {
        JS_EndRequest(cx);

        return NULL;
    }

    JS_GetUCPropertyAttributes(cx, obj, nameChars, nameLen, &attrs, &found);
    if (!found)
    {
        JS_LeaveCrossCompartmentCall(call);
        JS_EndRequest(cx);
        return NULL;
    }

    JS_ClearPendingException(cx);

    if(!JS_GetUCProperty(cx, obj, nameChars, nameLen, &val))
    {
        if (JS_IsExceptionPending(cx))
        {
            if (!JS_GetPendingException(cx, &pd.value))
            {
                JS_LeaveCrossCompartmentCall(call);
                JS_EndRequest(cx);
                return NULL;
            }
            pd.flags = JSPD_EXCEPTION;
        }
        else
        {
            pd.flags = JSPD_ERROR;
            pd.value = JSVAL_VOID;
        }
    }
    else
    {
        pd.value = val;
    }

    JS_LeaveCrossCompartmentCall(call);
    JS_EndRequest(cx);

    nameval = STRING_TO_JSVAL(name);
    if (!JS_ValueToId(cx, nameval, &nameid) ||
        !JS_IdToValue(cx, nameid, &pd.id)) {
        return NULL;
    }

    pd.slot = pd.spare = 0;
    pd.alias = JSVAL_NULL;
    pd.flags |= (attrs & JSPROP_ENUMERATE) ? JSPD_ENUMERATE : 0
        | (attrs & JSPROP_READONLY)  ? JSPD_READONLY  : 0
        | (attrs & JSPROP_PERMANENT) ? JSPD_PERMANENT : 0;

    return _newProperty(jsdc, &pd, JSDPD_HINTED);
}

JS_BINDED_PROP_GET_IMPL(FakeAudio, src)
{
	JSString* str = JS_NewStringCopyZ(cx, src.c_str());
	vp.set(STRING_TO_JSVAL(str));
	return JS_TRUE;
}

static JSBool
log_and_maybe_keep_exception(JSContext  *context,
                             char      **message_p,
                             gboolean    keep)
{
    jsval exc = JSVAL_VOID;
    JSString *s;
    char *message;
    JSBool retval = JS_FALSE;

    JS_BeginRequest(context);

    if (message_p)
        *message_p = NULL;

    JS_AddRoot(context, &exc);
    if (!JS_GetPendingException(context, &exc))
        goto out;

    JS_ClearPendingException(context);

    s = JS_ValueToString(context, exc);

    if (s == NULL) {
        gjs_debug(GJS_DEBUG_ERROR,
                  "Failed to convert exception to string");
        goto out; /* Exception should be thrown already */
    }

    if (!gjs_string_to_utf8(context, STRING_TO_JSVAL(s), &message)) {
        gjs_debug(GJS_DEBUG_ERROR,
                  "Failed to convert exception string to UTF-8");
        goto out; /* Error already set */
    }

    gjs_debug(GJS_DEBUG_ERROR,
              "Exception was: %s",
              message);

    if (message_p) {
        *message_p = message;
    } else {
        g_free(message);
    }

    gjs_log_exception_props(context, exc);

    /* We clear above and then set it back so any exceptions
     * from the logging process don't overwrite the original
     */
    if (keep)
        JS_SetPendingException(context, exc);

    retval = JS_TRUE;

 out:
    JS_RemoveRoot(context, &exc);

    JS_EndRequest(context);

    return retval;
}

/*
 * Return a string that may eval to something similar to the original object.
 */
static JSBool
exn_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
    jsval v;
    JSString *name, *message, *filename, *lineno_as_str, *result;
    int32 lineno;
    size_t lineno_length, name_length, message_length, filename_length, length;
    jschar *chars, *cp;

    if (!OBJ_GET_PROPERTY(cx, obj, (jsid)cx->runtime->atomState.nameAtom, &v))
        return JS_FALSE;
    name = js_ValueToString(cx, v);
    if (!name)
        return JS_FALSE;

    if (!JS_GetProperty(cx, obj, js_message_str, &v) ||
        !(message = js_ValueToSource(cx, v))) {
        return JS_FALSE;
    }

    if (!JS_GetProperty(cx, obj, js_filename_str, &v) ||
        !(filename = js_ValueToSource(cx, v))) {
        return JS_FALSE;
    }

    if (!JS_GetProperty(cx, obj, js_lineno_str, &v) ||
        !js_ValueToInt32 (cx, v, &lineno)) {
        return JS_FALSE;
    }

    if (lineno != 0) {
        if (!(lineno_as_str = js_ValueToString(cx, v))) {
            return JS_FALSE;
        }
        lineno_length = JSSTRING_LENGTH(lineno_as_str);
    } else {
        lineno_as_str = NULL;
        lineno_length = 0;
    }

    /* Magic 8, for the characters in ``(new ())''. */
    name_length = JSSTRING_LENGTH(name);
    message_length = JSSTRING_LENGTH(message);
    length = 8 + name_length + message_length;

    filename_length = JSSTRING_LENGTH(filename);
    if (filename_length != 0) {
        /* append filename as ``, {filename}'' */
        length += 2 + filename_length;
        if (lineno_as_str) {
            /* append lineno as ``, {lineno_as_str}'' */
            length += 2 + lineno_length;
        }
    } else {
        if (lineno_as_str) {
            /*
             * no filename, but have line number,
             * need to append ``, "", {lineno_as_str}''
             */
            length += 6 + lineno_length;
        }
    }

    cp = chars = (jschar*) JS_malloc(cx, (length + 1) * sizeof(jschar));
    if (!chars)
        return JS_FALSE;

    *cp++ = '('; *cp++ = 'n'; *cp++ = 'e'; *cp++ = 'w'; *cp++ = ' ';
    js_strncpy(cp, JSSTRING_CHARS(name), name_length);
    cp += name_length;
    *cp++ = '(';
    if (message_length != 0) {
        js_strncpy(cp, JSSTRING_CHARS(message), message_length);
        cp += message_length;
    }

    if (filename_length != 0) {
        /* append filename as ``, {filename}'' */
        *cp++ = ','; *cp++ = ' ';
        js_strncpy(cp, JSSTRING_CHARS(filename), filename_length);
        cp += filename_length;
    } else {
        if (lineno_as_str) {
            /*
             * no filename, but have line number,
             * need to append ``, "", {lineno_as_str}''
             */
            *cp++ = ','; *cp++ = ' '; *cp++ = '"'; *cp++ = '"';
        }
    }
    if (lineno_as_str) {
        /* append lineno as ``, {lineno_as_str}'' */
        *cp++ = ','; *cp++ = ' ';
        js_strncpy(cp, JSSTRING_CHARS(lineno_as_str), lineno_length);
        cp += lineno_length;
    }

//.........这里部分代码省略.........

jsval charptr_to_jsval( JSContext *cx, const char *str)
{
    JSString *ret_obj = JS_NewStringCopyZ(cx, str);
    return STRING_TO_JSVAL(ret_obj);
}

NS_IMETHODIMP
TelemetryImpl::GetChromeHangs(JSContext *cx, jsval *ret)
{
  MutexAutoLock hangReportMutex(mHangReportsMutex);
  JSObject *reportArray = JS_NewArrayObject(cx, 0, nullptr);
  if (!reportArray) {
    return NS_ERROR_FAILURE;
  }
  *ret = OBJECT_TO_JSVAL(reportArray);

  // Each hang report is an object in the 'chromeHangs' array
  for (size_t i = 0; i < mHangReports.Length(); ++i) {
    JSObject *reportObj = JS_NewObject(cx, NULL, NULL, NULL);
    if (!reportObj) {
      return NS_ERROR_FAILURE;
    }
    jsval reportObjVal = OBJECT_TO_JSVAL(reportObj);
    if (!JS_SetElement(cx, reportArray, i, &reportObjVal)) {
      return NS_ERROR_FAILURE;
    }

    // Record the hang duration (expressed in seconds)
    JSBool ok = JS_DefineProperty(cx, reportObj, "duration",
                                  INT_TO_JSVAL(mHangReports[i].duration),
                                  NULL, NULL, JSPROP_ENUMERATE);
    if (!ok) {
      return NS_ERROR_FAILURE;
    }

    // Represent call stack PCs as strings
    // (JS can't represent all 64-bit integer values)
    JSObject *pcArray = JS_NewArrayObject(cx, 0, nullptr);
    if (!pcArray) {
      return NS_ERROR_FAILURE;
    }
    ok = JS_DefineProperty(cx, reportObj, "stack", OBJECT_TO_JSVAL(pcArray),
                           NULL, NULL, JSPROP_ENUMERATE);
    if (!ok) {
      return NS_ERROR_FAILURE;
    }

    const uint32_t pcCount = mHangReports[i].callStack.Length();
    for (size_t pcIndex = 0; pcIndex < pcCount; ++pcIndex) {
      nsCAutoString pcString;
      pcString.AppendPrintf("0x%p", mHangReports[i].callStack[pcIndex]);
      JSString *str = JS_NewStringCopyZ(cx, pcString.get());
      if (!str) {
        return NS_ERROR_FAILURE;
      }
      jsval v = STRING_TO_JSVAL(str);
      if (!JS_SetElement(cx, pcArray, pcIndex, &v)) {
        return NS_ERROR_FAILURE;
      }
    }

    // Record memory map info
    JSObject *moduleArray = JS_NewArrayObject(cx, 0, nullptr);
    if (!moduleArray) {
      return NS_ERROR_FAILURE;
    }
    ok = JS_DefineProperty(cx, reportObj, "memoryMap",
                           OBJECT_TO_JSVAL(moduleArray),
                           NULL, NULL, JSPROP_ENUMERATE);
    if (!ok) {
      return NS_ERROR_FAILURE;
    }

#if defined(MOZ_ENABLE_PROFILER_SPS)
    const uint32_t moduleCount = mHangReports[i].moduleMap.GetSize();
    for (size_t moduleIndex = 0; moduleIndex < moduleCount; ++moduleIndex) {
      // Current module
      const SharedLibrary &module =
        mHangReports[i].moduleMap.GetEntry(moduleIndex);

      JSObject *moduleInfoArray = JS_NewArrayObject(cx, 0, nullptr);
      if (!moduleInfoArray) {
        return NS_ERROR_FAILURE;
      }
      jsval val = OBJECT_TO_JSVAL(moduleInfoArray);
      if (!JS_SetElement(cx, moduleArray, moduleIndex, &val)) {
        return NS_ERROR_FAILURE;
      }

      // Start address
      nsCAutoString addressString;
      addressString.AppendPrintf("0x%p", module.GetStart());
      JSString *str = JS_NewStringCopyZ(cx, addressString.get());
      if (!str) {
        return NS_ERROR_FAILURE;
      }
      val = STRING_TO_JSVAL(str);
      if (!JS_SetElement(cx, moduleInfoArray, 0, &val)) {
        return NS_ERROR_FAILURE;
      }

      // Module name
      str = JS_NewStringCopyZ(cx, module.GetName());
      if (!str) {
        return NS_ERROR_FAILURE;
      }
//.........这里部分代码省略.........

// static
XPCNativeInterface*
XPCNativeInterface::NewInstance(XPCCallContext& ccx,
                                nsIInterfaceInfo* aInfo)
{
    static const PRUint16 MAX_LOCAL_MEMBER_COUNT = 16;
    XPCNativeMember local_members[MAX_LOCAL_MEMBER_COUNT];
    XPCNativeInterface* obj = nsnull;
    XPCNativeMember* members = nsnull;

    int i;
    JSBool failed = JS_FALSE;
    PRUint16 constCount;
    PRUint16 methodCount;
    PRUint16 totalCount;
    PRUint16 realTotalCount = 0;
    XPCNativeMember* cur;
    JSString*  str;
    jsval name;
    jsval interfaceName;

    // XXX Investigate lazy init? This is a problem given the
    // 'placement new' scheme - we need to at least know how big to make
    // the object. We might do a scan of methods to determine needed size,
    // then make our object, but avoid init'ing *any* members until asked?
    // Find out how often we create these objects w/o really looking at
    // (or using) the members.

    PRBool canScript;
    if(NS_FAILED(aInfo->IsScriptable(&canScript)) || !canScript)
        return nsnull;

    if(NS_FAILED(aInfo->GetMethodCount(&methodCount)) ||
       NS_FAILED(aInfo->GetConstantCount(&constCount)))
        return nsnull;

    // If the interface does not have nsISupports in its inheritance chain
    // then we know we can't reflect its methods. However, some interfaces that
    // are used just to reflect constants are declared this way. We need to
    // go ahead and build the thing. But, we'll ignore whatever methods it may
    // have.
    if(!nsXPConnect::IsISupportsDescendant(aInfo))
        methodCount = 0;

    totalCount = methodCount + constCount;

    if(totalCount > MAX_LOCAL_MEMBER_COUNT)
    {
        members = new XPCNativeMember[totalCount];
        if(!members)
            return nsnull;
    }
    else
    {
        members = local_members;
    }

    // NOTE: since getters and setters share a member, we might not use all
    // of the member objects.

    for(i = 0; i < methodCount; i++)
    {
        const nsXPTMethodInfo* info;
        if(NS_FAILED(aInfo->GetMethodInfo(i, &info)))
        {
            failed = JS_TRUE;
            break;
        }

        // don't reflect Addref or Release
        if(i == 1 || i == 2)
            continue;

        if(!XPCConvert::IsMethodReflectable(*info))
            continue;

        str = JS_InternString(ccx, info->GetName());
        if(!str)
        {
            NS_ASSERTION(0,"bad method name");
            failed = JS_TRUE;
            break;
        }
        name = STRING_TO_JSVAL(str);

        if(info->IsSetter())
        {
            NS_ASSERTION(realTotalCount,"bad setter");
            // Note: ASSUMES Getter/Setter pairs are next to each other
            // This is a rule of the typelib spec.
            cur = &members[realTotalCount-1];
            NS_ASSERTION(cur->GetName() == name,"bad setter");
            NS_ASSERTION(cur->IsReadOnlyAttribute(),"bad setter");
            NS_ASSERTION(cur->GetIndex() == i-1,"bad setter");
            cur->SetWritableAttribute();
        }
        else
        {
            // XXX need better way to find dups
            // NS_ASSERTION(!LookupMemberByID(name),"duplicate method name");
//.........这里部分代码省略.........

/**
 * Define OS-specific constants.
 *
 * This function creates or uses JS object |OS.Constants| to store
 * all its constants.
 */
bool DefineOSFileConstants(JSContext *cx, JS::Handle<JSObject*> global)
{
  MOZ_ASSERT(gInitialized);

  if (gPaths == nullptr) {
    // If an initialization error was ignored, we may end up with
    // |gInitialized == true| but |gPaths == nullptr|. We cannot
    // |MOZ_ASSERT| this, as this would kill precompile_cache.js,
    // so we simply return an error.
    JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
      JSMSG_CANT_OPEN, "OSFileConstants", "initialization has failed");
    return false;
  }

  JS::Rooted<JSObject*> objOS(cx);
  if (!(objOS = GetOrCreateObjectProperty(cx, global, "OS"))) {
    return false;
  }
  JS::Rooted<JSObject*> objConstants(cx);
  if (!(objConstants = GetOrCreateObjectProperty(cx, objOS, "Constants"))) {
    return false;
  }

  // Build OS.Constants.libc

  JS::Rooted<JSObject*> objLibc(cx);
  if (!(objLibc = GetOrCreateObjectProperty(cx, objConstants, "libc"))) {
    return false;
  }
  if (!dom::DefineConstants(cx, objLibc, gLibcProperties)) {
    return false;
  }

#if defined(XP_WIN)
  // Build OS.Constants.Win

  JS::Rooted<JSObject*> objWin(cx);
  if (!(objWin = GetOrCreateObjectProperty(cx, objConstants, "Win"))) {
    return false;
  }
  if (!dom::DefineConstants(cx, objWin, gWinProperties)) {
    return false;
  }
#endif // defined(XP_WIN)

  // Build OS.Constants.Sys

  JS::Rooted<JSObject*> objSys(cx);
  if (!(objSys = GetOrCreateObjectProperty(cx, objConstants, "Sys"))) {
    return false;
  }

  nsCOMPtr<nsIXULRuntime> runtime = do_GetService(XULRUNTIME_SERVICE_CONTRACTID);
  if (runtime) {
    nsAutoCString os;
    DebugOnly<nsresult> rv = runtime->GetOS(os);
    MOZ_ASSERT(NS_SUCCEEDED(rv));

    JSString* strVersion = JS_NewStringCopyZ(cx, os.get());
    if (!strVersion) {
      return false;
    }

    JS::Rooted<JS::Value> valVersion(cx, STRING_TO_JSVAL(strVersion));
    if (!JS_SetProperty(cx, objSys, "Name", valVersion)) {
      return false;
    }
  }

#if defined(DEBUG)
  JS::Rooted<JS::Value> valDebug(cx, JSVAL_TRUE);
  if (!JS_SetProperty(cx, objSys, "DEBUG", valDebug)) {
    return false;
  }
#endif

  dom::ConstantSpec umask_cs[] = {
    { "umask", UINT_TO_JSVAL(gUserUmask) },
    PROP_END
  };
  if (!dom::DefineConstants(cx, objSys, umask_cs)) {
      return false;
  }

  // Build OS.Constants.Path

  JS::Rooted<JSObject*> objPath(cx);
  if (!(objPath = GetOrCreateObjectProperty(cx, objConstants, "Path"))) {
    return false;
  }

  // Locate libxul
  // Note that we don't actually provide the full path, only the name of the
  // library, which is sufficient to link to the library using js-ctypes.
//.........这里部分代码省略.........

/*
 * This is a wrapper around JS_ReportError(), useful when an error condition
 * is the result of a JVM failure or exception condition.  It appends the
 * message associated with the pending Java exception to the passed in
 * printf-style format string and arguments.
 */
static void
vreport_java_error(JSContext *cx, JNIEnv *jEnv, const char *format, va_list ap)
{
    jobject java_obj;
    jclass java_class;
    JavaClassDescriptor *class_descriptor;
    jthrowable java_exception;
    JSType wrapped_exception_type;
    jsval js_exception;
       
    java_obj = NULL;
    class_descriptor = NULL;

    /* Get the exception out of the java environment. */
    java_exception = (*jEnv)->ExceptionOccurred(jEnv);
    if (!java_exception) {
        JSString *err_jsstr;
        char *err = JS_vsmprintf(format, ap);
        if (!err)
            return;
        err_jsstr = JS_NewString(cx, err, strlen(err));
        if (!err_jsstr)
            return;
        JS_SetPendingException(cx, STRING_TO_JSVAL(err_jsstr));
        return;
    }

    
    (*jEnv)->ExceptionClear(jEnv);
    
    /* Check for JSException */
    if (njJSException && 
        (*jEnv)->IsInstanceOf(jEnv, java_exception, njJSException)) {
        
        wrapped_exception_type = 
            (*jEnv)->GetIntField(jEnv, java_exception,
            njJSException_wrappedExceptionType);
        
        /* (int) to suppress warning */
        if ((int)wrapped_exception_type != JSTYPE_EMPTY) {
            java_obj = 
                (*jEnv)->GetObjectField(jEnv, java_exception, 
                njJSException_wrappedException);
            
            if ((java_obj == NULL) && 
                (wrapped_exception_type == JSTYPE_OBJECT)) {
                js_exception = JSVAL_NULL;
            } else { 
                java_class = (*jEnv)->GetObjectClass(jEnv, java_obj); 
                class_descriptor = jsj_GetJavaClassDescriptor(cx, jEnv, java_class);
                /* OK to delete ref, since above call adds global ref */
                (*jEnv)->DeleteLocalRef(jEnv, java_class);  
                
                /* Convert native JS values back to native types. */
                switch(wrapped_exception_type) {
                case JSTYPE_NUMBER:
                    if (!jsj_ConvertJavaObjectToJSNumber(cx, jEnv,
                        class_descriptor,
                        java_obj, 
                        &js_exception))
                        goto error;
                    break;
                case JSTYPE_BOOLEAN:
                    if (!jsj_ConvertJavaObjectToJSBoolean(cx, jEnv,
                        class_descriptor,
                        java_obj, 
                        &js_exception))
                        goto error;
                    break;
                case JSTYPE_STRING:
                    if (!jsj_ConvertJavaObjectToJSString(cx, jEnv,
                        class_descriptor,
                        java_obj, 
                        &js_exception))
                        goto error;
                    break;
                case JSTYPE_VOID:
                    js_exception = JSVAL_VOID;
                    break;
                case JSTYPE_OBJECT:
                case JSTYPE_FUNCTION:
                default:
                    if ((*jEnv)->IsInstanceOf(jEnv, java_obj, njJSObject)) {
                        js_exception = OBJECT_TO_JSVAL(jsj_UnwrapJSObjectWrapper(jEnv, java_obj));
                        if (!js_exception)
                            goto error;                        
                    } else {
                        if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_obj, 
                            &js_exception)) 
                            goto error;
                    }
                }
            }
        }
//.........这里部分代码省略.........

JSBool js_destroy(JSContext *context) {
    JS_SetPendingException(context, STRING_TO_JSVAL(JS_NewStringCopyZ(context, "timeout")));
    return JS_FALSE;
}

static JSBool js_console_get(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
	ulong		val;
    jsint       tiny;
	JSString*	js_str;
	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

    tiny = JSVAL_TO_INT(id);

	switch(tiny) {
		case CON_PROP_STATUS:
			val=sbbs->console;
			break;
		case CON_PROP_LNCNTR:
			val=sbbs->lncntr;
			break;
		case CON_PROP_ATTR:
			val=sbbs->curatr;
			break;
		case CON_PROP_TOS:
			val=sbbs->tos;
			break;
		case CON_PROP_ROWS:
			val=sbbs->rows;
			break;
		case CON_PROP_COLUMNS:
			val=sbbs->cols;
			break;
		case CON_PROP_AUTOTERM:
			val=sbbs->autoterm;
			break;
		case CON_PROP_TERMINAL:
			if((js_str=JS_NewStringCopyZ(cx, sbbs->terminal))==NULL)
				return(JS_FALSE);
			*vp = STRING_TO_JSVAL(js_str);
			return(JS_TRUE);
		case CON_PROP_TIMEOUT:
			val=sbbs->timeout;
			break;
		case CON_PROP_TIMELEFT_WARN:
			val=sbbs->timeleft_warn;
			break;
		case CON_PROP_ABORTED:
			*vp=BOOLEAN_TO_JSVAL(INT_TO_BOOL(sbbs->sys_status&SS_ABORT));
			return(JS_TRUE);
		case CON_PROP_ABORTABLE:
			*vp=BOOLEAN_TO_JSVAL(INT_TO_BOOL(sbbs->rio_abortable));
			return(JS_TRUE);
		case CON_PROP_TELNET_MODE:
			val=sbbs->telnet_mode;
			break;
		case CON_PROP_GETSTR_OFFSET:
			val=sbbs->getstr_offset;
			break;
		case CON_PROP_WORDWRAP:
			if((js_str=JS_NewStringCopyZ(cx, sbbs->wordwrap))==NULL)
				return(JS_FALSE);
			*vp = STRING_TO_JSVAL(js_str);
			return(JS_TRUE);
		case CON_PROP_QUESTION:
			if((js_str=JS_NewStringCopyZ(cx, sbbs->question))==NULL)
				return(JS_FALSE);
			*vp = STRING_TO_JSVAL(js_str);
			return(JS_TRUE);
		case CON_PROP_CTRLKEY_PASSTHRU:
			val=sbbs->cfg.ctrlkey_passthru;
			break;
		case CON_PROP_INBUF_LEVEL:
			val=RingBufFull(&sbbs->inbuf);
			break;
		case CON_PROP_INBUF_SPACE:
			val=RingBufFree(&sbbs->inbuf);
			break;
		case CON_PROP_OUTBUF_LEVEL:
			val=RingBufFull(&sbbs->outbuf);
			break;
		case CON_PROP_OUTBUF_SPACE:
			val=RingBufFree(&sbbs->outbuf);
			break;
		default:
			return(JS_TRUE);
	}

	*vp = INT_TO_JSVAL(val);

	return(JS_TRUE);
}

JSAtom *
js_AtomizeString(JSContext *cx, JSString *str, uintN flags)
{
    JSHashNumber keyHash;
    jsval key;
    JSAtomState *state;
    JSHashTable *table;
    JSHashEntry *he, **hep;
    JSAtom *atom;

    keyHash = js_HashString(str);
    key = STRING_TO_JSVAL(str);
    state = &cx->runtime->atomState;
    JS_LOCK(&state->lock, cx);
    table = state->table;
    hep = JS_HashTableRawLookup(table, keyHash, (void *)key);
    if ((he = *hep) == NULL) {
#ifdef JS_THREADSAFE
        uint32 gen = state->tablegen;
        JS_UNLOCK(&state->lock, cx);
#endif

        if (flags & ATOM_TMPSTR) {
            str = (flags & ATOM_NOCOPY)
                  ? js_NewString(cx, str->chars, str->length, 0)
                  : js_NewStringCopyN(cx, str->chars, str->length, 0);
            if (!str)
                return NULL;
            key = STRING_TO_JSVAL(str);
        } else {
            if (!JS_MakeStringImmutable(cx, str))
                return NULL;
        }

#ifdef JS_THREADSAFE
        JS_LOCK(&state->lock, cx);
        if (state->tablegen != gen) {
            hep = JS_HashTableRawLookup(table, keyHash, (void *)key);
            if ((he = *hep) != NULL) {
                atom = (JSAtom *)he;
                if (flags & ATOM_NOCOPY)
                    str->chars = NULL;
                goto out;
            }
        }
#endif

        he = JS_HashTableRawAdd(table, hep, keyHash, (void *)key, NULL);
        if (!he) {
            JS_ReportOutOfMemory(cx);
            atom = NULL;
            goto out;
        }
    }

    atom = (JSAtom *)he;
    atom->flags |= flags & (ATOM_PINNED | ATOM_INTERNED);
out:
    JS_UNLOCK(&state->lock,cx);
    return atom;
}

JSBool
Window_getString (JSContext* cx, JSObject* object, uintN argc, jsval* argv, jsval* rval)
{
    JSObject* options;

    WINDOW* win = (WINDOW*) JS_GetPrivate(cx, object);

    JS_BeginRequest(cx);
    JS_EnterLocalRootScope(cx);

    jsval parent;
    JS_GetProperty(cx, JS_GetGlobalObject(cx), "ncurses", &parent);
    JS_GetProperty(cx, JSVAL_TO_OBJECT(parent), "Screen", &parent);
    JSObject* Screen = JSVAL_TO_OBJECT(parent);

    jsval property;
    JS_GetProperty(cx, Screen, "echo", &property);
    JSBool windowEchoing = JSVAL_TO_BOOLEAN(property);
    JS_GetProperty(cx, Screen, "cursor", &property);
    jsint windowCursor = JSVAL_TO_INT(property);

    if (argc == 0) {
        echo();
        curs_set(1);

        *rval = STRING_TO_JSVAL(__Window_readLine(cx, win, JS_FALSE, 0, 0));

        if (!windowEchoing) {
            noecho();
        }
        curs_set(windowCursor);
    }
    else {
        JS_ValueToObject(cx, argv[0], &options);

        if (!options) {
            JS_ReportError(cx, "Options isn't a valid object.");

            JS_LeaveLocalRootScope(cx);
            JS_EndRequest(cx);
            return JS_FALSE;
        }

        jsval x, y, jsEcho;
        JS_GetProperty(cx, options, "x", &x);
        JS_GetProperty(cx, options, "y", &y);
        JS_GetProperty(cx, options, "echo", &jsEcho);

        if (!JSVAL_IS_INT(x) || !JSVAL_IS_INT(y)) {
            __Window_echofy(jsEcho, windowEchoing, windowCursor, JS_TRUE);
            *rval = STRING_TO_JSVAL(__Window_readLine(cx, win, JS_FALSE, 0, 0));
            __Window_echofy(jsEcho, windowEchoing, windowCursor, JS_FALSE);
        }
        else {
            __Window_echofy(jsEcho, windowEchoing, windowCursor, JS_TRUE);
            *rval = STRING_TO_JSVAL(__Window_readLine(cx, win, JS_TRUE, x, y));
            __Window_echofy(jsEcho, windowEchoing, windowCursor, JS_FALSE);
        }
    }

    JS_LeaveLocalRootScope(cx);
    JS_EndRequest(cx);

    return JS_TRUE;
}