extern "C" NS_GFX_(void) NS_RGBToASCIIHex(nscolor aColor,
                                          nsAFlatCString& aResult)
{
  aResult.SetLength(7);
  NS_ASSERTION(aResult.Length() == 7, "small SetLength failed, use an autostring instead!");
  char *buf = aResult.BeginWriting();
  PR_snprintf(buf, 8, "#%02x%02x%02x",
              NS_GET_R(aColor), NS_GET_G(aColor), NS_GET_B(aColor));
}

nsresult nsTextToSubURI::convertURItoUnicode(const nsAFlatCString &aCharset,
                                             const nsAFlatCString &aURI, 
                                             nsAString &_retval)
{
  // check for 7bit encoding the data may not be ASCII after we decode
  bool isStatefulCharset = statefulCharset(aCharset.get());

  if (!isStatefulCharset) {
    if (IsASCII(aURI)) {
      CopyASCIItoUTF16(aURI, _retval);
      return NS_OK;
    }
    if (IsUTF8(aURI)) {
      CopyUTF8toUTF16(aURI, _retval);
      return NS_OK;
    }
  }

  // empty charset could indicate UTF-8, but aURI turns out not to be UTF-8.
  NS_ENSURE_FALSE(aCharset.IsEmpty(), NS_ERROR_INVALID_ARG);

  nsAutoCString encoding;
  if (!EncodingUtils::FindEncodingForLabelNoReplacement(aCharset, encoding)) {
    return NS_ERROR_UCONV_NOCONV;
  }
  nsCOMPtr<nsIUnicodeDecoder> unicodeDecoder =
    EncodingUtils::DecoderForEncoding(encoding);

  unicodeDecoder->SetInputErrorBehavior(nsIUnicodeDecoder::kOnError_Signal);

  int32_t srcLen = aURI.Length();
  int32_t dstLen;
  nsresult rv = unicodeDecoder->GetMaxLength(aURI.get(), srcLen, &dstLen);
  NS_ENSURE_SUCCESS(rv, rv);

  char16_t *ustr = (char16_t *) moz_xmalloc(dstLen * sizeof(char16_t));
  NS_ENSURE_TRUE(ustr, NS_ERROR_OUT_OF_MEMORY);

  rv = unicodeDecoder->Convert(aURI.get(), &srcLen, ustr, &dstLen);

  if (NS_SUCCEEDED(rv))
    _retval.Assign(ustr, dstLen);
  
  free(ustr);

  return rv;
}

bool validOperator(nsAFlatCString& aString) {
  bool result=false;
  int  len=aString.Length();

  switch(len) {
    case 1: return true;
    case 3:
      result=(aString.Equals(NS_LITERAL_CSTRING("<<=")) ||
              aString.Equals(NS_LITERAL_CSTRING(">>=")));
      break;
    default:
       switch(aString[0]) {
          case '+':  case '=':
          case '&':  case '|':
          case '<':  case '>':
             if((aString[1]==aString[0]) || (aString[1]=='='))
                result=true;
             break;
          case '-':
             if((aString[1]==aString[0]) || (aString[1]=='>'))
                result=true;
             break;
          case ':':
             if((len==2) && (aString[1]==aString[0]))
               result=true;
             break;
          case '*':
          case '/':
          case '^':
          case '!':
          case '~':
          case '%':
             if((aString[1]=='='))
                result=true;
             break;
          case '(':
            result=aString[1]==')'; break;
          case '[':
            result=aString[1]==']'; break;
          default:
             break;
       }
       break;
  }
  return result;
}

// note that this appends to aResult, and does not assign!
static void str_escape(const char * original, nsAFlatCString& aResult)
{
    /* JavaScript does not allow quotes, slashes, or line terminators inside
     * strings so we must escape them. ECMAScript defines four line
     * terminators, but we're only worrying about \r and \n here.  We currently
     * feed our pref script to the JS interpreter as Latin-1 so  we won't
     * encounter \u2028 (line separator) or \u2029 (paragraph separator).
     *
     * WARNING: There are hints that we may be moving to storing prefs
     * as utf8. If we ever feed them to the JS compiler as UTF8 then
     * we'll have to worry about the multibyte sequences that would be
     * interpreted as \u2028 and \u2029
     */
    const char *p;

    if (original == NULL)
        return;

    /* Paranoid worst case all slashes will free quickly */
    for  (p=original; *p; ++p)
    {
        switch (*p)
        {
            case '\n':
                aResult.Append("\\n");
                break;

            case '\r':
                aResult.Append("\\r");
                break;

            case '\\':
                aResult.Append("\\\\");
                break;

            case '\"':
                aResult.Append("\\\"");
                break;

            default:
                aResult.Append(*p);
                break;
        }
    }
}

static nsresult ConvertToUTF8(nsIUnicodeDecoder *aUnicodeDecoder,
                              nsAFlatCString& aString)
{
  int32_t numberOfBytes = aString.Length();
  int32_t outUnicodeLen;
  nsAutoString buffer;
  nsresult rv = aUnicodeDecoder->GetMaxLength(aString.get(), numberOfBytes,
                                              &outUnicodeLen);
  NS_ENSURE_SUCCESS(rv, rv);
  if (!EnsureStringLength(buffer, outUnicodeLen))
    return NS_ERROR_OUT_OF_MEMORY;
  rv = aUnicodeDecoder->Convert(aString.get(), &numberOfBytes,
                                buffer.BeginWriting(), &outUnicodeLen);
  NS_ENSURE_SUCCESS(rv, rv);
  buffer.SetLength(outUnicodeLen);
  CopyUTF16toUTF8(buffer, aString);
  
  return NS_OK;
}

bool
CommonElementAnimationData::CanAnimatePropertyOnCompositor(const dom::Element *aElement,
                                                           nsCSSProperty aProperty)
{
  static bool sShouldLog;
  static bool sShouldLogPrefCached;

  if (!sShouldLogPrefCached) {
    sShouldLogPrefCached = true;
    Preferences::AddBoolVarCache(&sShouldLog,
                                 "layers.offmainthreadcomposition.log-animations");
  }

  nsIFrame* frame = aElement->GetPrimaryFrame();
  if (aProperty == eCSSProperty_visibility) {
    return true;
  }
  if (aProperty == eCSSProperty_opacity) {
    bool enabled = nsLayoutUtils::AreOpacityAnimationsEnabled();
    if (!enabled && sShouldLog) {
      printf_stderr("Performance warning: Async animation of 'opacity' is disabled\n");
    }
    return enabled;
  }
  if (aProperty == eCSSProperty_transform) {
    if (frame &&
        frame->Preserves3D() &&
        frame->Preserves3DChildren()) {
      if (sShouldLog) {
        printf_stderr("Gecko bug: Async animation of 'preserve-3d' transforms is not supported.  See bug 779598\n");
      }
      return false;
    }
    if (frame && frame->IsSVGTransformed()) {
      if (sShouldLog) {
        printf_stderr("Gecko bug: Async 'transform' animations of frames with SVG transforms is not supported.  See bug 779599\n");
      }
      return false;
    }
    bool enabled = nsLayoutUtils::AreTransformAnimationsEnabled();
    if (!enabled && sShouldLog) {
      printf_stderr("Performance warning: Async animation of 'transform' is disabled\n");
    }
    return enabled;
  }
  if (sShouldLog) {
    const nsAFlatCString propName = nsCSSProps::GetStringValue(aProperty);
    printf_stderr("Performance warning: Async animation cancelled because of unsupported property '%s'\n", propName.get());
  }
  return false;
}

nsresult nsTextToSubURI::convertURItoUnicode(const nsAFlatCString &aCharset,
                                             const nsAFlatCString &aURI, 
                                             bool aIRI, 
                                             nsAString &_retval)
{
  nsresult rv = NS_OK;

  // check for 7bit encoding the data may not be ASCII after we decode
  bool isStatefulCharset = statefulCharset(aCharset.get());

  if (!isStatefulCharset && IsASCII(aURI)) {
    CopyASCIItoUTF16(aURI, _retval);
    return rv;
  }

  if (!isStatefulCharset && aIRI) {
    if (IsUTF8(aURI)) {
      CopyUTF8toUTF16(aURI, _retval);
      return rv;
    }
  }

  // empty charset could indicate UTF-8, but aURI turns out not to be UTF-8.
  NS_ENSURE_FALSE(aCharset.IsEmpty(), NS_ERROR_INVALID_ARG);

  nsCOMPtr<nsICharsetConverterManager> charsetConverterManager;

  charsetConverterManager = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIUnicodeDecoder> unicodeDecoder;
  rv = charsetConverterManager->GetUnicodeDecoder(aCharset.get(), 
                                                  getter_AddRefs(unicodeDecoder));
  NS_ENSURE_SUCCESS(rv, rv);
  unicodeDecoder->SetInputErrorBehavior(nsIUnicodeDecoder::kOnError_Signal);

  int32_t srcLen = aURI.Length();
  int32_t dstLen;
  rv = unicodeDecoder->GetMaxLength(aURI.get(), srcLen, &dstLen);
  NS_ENSURE_SUCCESS(rv, rv);

  char16_t *ustr = (char16_t *) NS_Alloc(dstLen * sizeof(char16_t));
  NS_ENSURE_TRUE(ustr, NS_ERROR_OUT_OF_MEMORY);

  rv = unicodeDecoder->Convert(aURI.get(), &srcLen, ustr, &dstLen);

  if (NS_SUCCEEDED(rv))
    _retval.Assign(ustr, dstLen);
  
  NS_Free(ustr);

  return rv;
}

/**
 *  Consume characters until you find one contained in given
 *  input set.
 *  
 *  @update  gess 3/25/98
 *  @param   
 *  @return  error code
 */
int CScanner::readUntil(nsAFlatCString& aString,nsAFlatCString& aTerminalSet,bool addTerminal){
  char theChar=0;
  int result=kNoError;

  while(kNoError == result) {
    result=getChar(theChar);
    if(kNoError==result) {
      int pos=aTerminalSet.FindChar(theChar);
      if(kNotFound!=pos) {
        if(addTerminal)
          aString+=theChar;
        else push(theChar);
        break;
      }
      else aString+=theChar;
    }
  }
  return result;
}

nsresult nsTestUConv::Encode(PRUnichar ** aSrc, PRUnichar * aSrcEnd, 
                             char ** aDest, char * aDestEnd, 
                             const nsAFlatCString& aCharset)
{
  char * trace = "Encode";
  mLog.AddTrace(trace);
  nsresult res = NS_OK;

  nsCOMPtr<nsICharsetConverterManager> ccMan = 
           do_GetService(kCharsetConverterManagerCID, &res);
  if (NS_FAILED(res)) {
    mLog.PrintError("NS_WITH_SERVICE", res);
    return res;
  }

  nsCOMPtr<nsIUnicodeEncoder> enc;
  res = ccMan->GetUnicodeEncoder(aCharset.get(), getter_AddRefs(enc));
  if (NS_FAILED(res)) {
    mLog.PrintError("GetUnicodeEncoder()", res);
    return res;
  }

  res = ConvertEncode(aSrc, aSrcEnd, aDest, aDestEnd, enc);
  if (NS_FAILED(res)) {
    mLog.PrintError("Convert()", res);
    return res;
  }

  res = FinishEncode(aDest, aDestEnd, enc);
  if (NS_FAILED(res)) {
    mLog.PrintError("Finish()", res);
    return res;
  }

  mLog.DelTrace(trace);
  return res;
}

nsresult
nsHttpChannelAuthProvider::GetCredentialsForChallenge(const char *challenge,
                                                      const char *authType,
                                                      bool        proxyAuth,
                                                      nsIHttpAuthenticator *auth,
                                                      nsAFlatCString     &creds)
{
    LOG(("nsHttpChannelAuthProvider::GetCredentialsForChallenge "
         "[this=%p channel=%p proxyAuth=%d challenges=%s]\n",
        this, mAuthChannel, proxyAuth, challenge));

    // this getter never fails
    nsHttpAuthCache *authCache = gHttpHandler->AuthCache();

    uint32_t authFlags;
    nsresult rv = auth->GetAuthFlags(&authFlags);
    if (NS_FAILED(rv)) return rv;

    nsCAutoString realm;
    ParseRealm(challenge, realm);

    // if no realm, then use the auth type as the realm.  ToUpperCase so the
    // ficticious realm stands out a bit more.
    // XXX this will cause some single signon misses!
    // XXX this was meant to be used with NTLM, which supplies no realm.
    /*
    if (realm.IsEmpty()) {
        realm = authType;
        ToUpperCase(realm);
    }
    */

    // set informations that depend on whether
    // we're authenticating against a proxy
    // or a webserver
    const char *host;
    int32_t port;
    nsHttpAuthIdentity *ident;
    nsCAutoString path, scheme;
    bool identFromURI = false;
    nsISupports **continuationState;

    rv = GetAuthorizationMembers(proxyAuth, scheme, host, port,
                                 path, ident, continuationState);
    if (NS_FAILED(rv)) return rv;

    if (!proxyAuth) {
        // if this is the first challenge, then try using the identity
        // specified in the URL.
        if (mIdent.IsEmpty()) {
            GetIdentityFromURI(authFlags, mIdent);
            identFromURI = !mIdent.IsEmpty();
        }
    }

    //
    // if we already tried some credentials for this transaction, then
    // we need to possibly clear them from the cache, unless the credentials
    // in the cache have changed, in which case we'd want to give them a
    // try instead.
    //
    nsHttpAuthEntry *entry = nullptr;
    authCache->GetAuthEntryForDomain(scheme.get(), host, port,
                                     realm.get(), &entry);

    // hold reference to the auth session state (in case we clear our
    // reference to the entry).
    nsCOMPtr<nsISupports> sessionStateGrip;
    if (entry)
        sessionStateGrip = entry->mMetaData;

    // for digest auth, maybe our cached nonce value simply timed out...
    bool identityInvalid;
    nsISupports *sessionState = sessionStateGrip;
    rv = auth->ChallengeReceived(mAuthChannel,
                                 challenge,
                                 proxyAuth,
                                 &sessionState,
                                 &*continuationState,
                                 &identityInvalid);
    sessionStateGrip.swap(sessionState);
    if (NS_FAILED(rv)) return rv;

    LOG(("  identity invalid = %d\n", identityInvalid));

    if (identityInvalid) {
        if (entry) {
            if (ident->Equals(entry->Identity())) {
                LOG(("  clearing bad auth cache entry\n"));
                // ok, we've already tried this user identity, so clear the
                // corresponding entry from the auth cache.
                authCache->ClearAuthEntry(scheme.get(), host,
                                          port, realm.get());
                entry = nullptr;
                ident->Clear();
            }
            else if (!identFromURI ||
                     nsCRT::strcmp(ident->User(),
                                   entry->Identity().User()) == 0) {
                LOG(("  taking identity from auth cache\n"));
//.........这里部分代码省略.........

nsresult
nsPermissionManager::AddInternal(const nsAFlatCString &aHost,
                                 const nsAFlatCString &aType,
                                 PRUint32              aPermission,
                                 PRInt64               aID,
                                 PRUint32              aExpireType,
                                 PRInt64               aExpireTime,
                                 NotifyOperationType   aNotifyOperation,
                                 DBOperationType       aDBOperation)
{
  if (!IsChildProcess()) {
    IPC::Permission permission((aHost),
                               (aType),
                               aPermission, aExpireType, aExpireTime);

    nsTArray<ContentParent*> cplist;
    ContentParent::GetAll(cplist);
    for (PRUint32 i = 0; i < cplist.Length(); ++i) {
      ContentParent* cp = cplist[i];
      if (cp->NeedsPermissionsUpdate())
        unused << cp->SendAddPermission(permission);
    }
  }

  if (!gHostArena) {
    gHostArena = new PLArenaPool;
    if (!gHostArena)
      return NS_ERROR_OUT_OF_MEMORY;    
    PL_INIT_ARENA_POOL(gHostArena, "PermissionHostArena", HOST_ARENA_SIZE);
  }

  // look up the type index
  PRInt32 typeIndex = GetTypeIndex(aType.get(), true);
  NS_ENSURE_TRUE(typeIndex != -1, NS_ERROR_OUT_OF_MEMORY);

  // When an entry already exists, PutEntry will return that, instead
  // of adding a new one
  nsHostEntry *entry = mHostTable.PutEntry(aHost.get());
  if (!entry) return NS_ERROR_FAILURE;
  if (!entry->GetKey()) {
    mHostTable.RawRemoveEntry(entry);
    return NS_ERROR_OUT_OF_MEMORY;
  }

  // figure out the transaction type, and get any existing permission value
  OperationType op;
  PRInt32 index = entry->GetPermissionIndex(typeIndex);
  if (index == -1) {
    if (aPermission == nsIPermissionManager::UNKNOWN_ACTION)
      op = eOperationNone;
    else
      op = eOperationAdding;

  } else {
    nsPermissionEntry oldPermissionEntry = entry->GetPermissions()[index];

    // remove the permission if the permission is UNKNOWN, update the
    // permission if its value or expire type have changed OR if the time has
    // changed and the expire type is time, otherwise, don't modify.  There's
    // no need to modify a permission that doesn't expire with time when the
    // only thing changed is the expire time.
    if (aPermission == oldPermissionEntry.mPermission && 
        aExpireType == oldPermissionEntry.mExpireType &&
        (aExpireType != nsIPermissionManager::EXPIRE_TIME || 
         aExpireTime == oldPermissionEntry.mExpireTime))
      op = eOperationNone;
    else if (aPermission == nsIPermissionManager::UNKNOWN_ACTION)
      op = eOperationRemoving;
    else
      op = eOperationChanging;
  }

  // do the work for adding, deleting, or changing a permission:
  // update the in-memory list, write to the db, and notify consumers.
  PRInt64 id;
  switch (op) {
  case eOperationNone:
    {
      // nothing to do
      return NS_OK;
    }

  case eOperationAdding:
    {
      if (aDBOperation == eWriteToDB) {
        // we'll be writing to the database - generate a known unique id
        id = ++mLargestID;
      } else {
        // we're reading from the database - use the id already assigned
        id = aID;
      }

      entry->GetPermissions().AppendElement(nsPermissionEntry(typeIndex, aPermission, id, aExpireType, aExpireTime));

      if (aDBOperation == eWriteToDB && aExpireType != nsIPermissionManager::EXPIRE_SESSION)
        UpdateDB(op, mStmtInsert, id, aHost, aType, aPermission, aExpireType, aExpireTime);

      if (aNotifyOperation == eNotify) {
        NotifyObserversWithPermission(aHost,
                                      mTypeArray[typeIndex],
//.........这里部分代码省略.........

void
logging::Enable(const nsAFlatCString& aModules)
{
  EnableLogging(aModules.get());
}

//----------------------------------------------------------------------------------------
void nsPersistentFileDescriptor::SetData(const nsAFlatCString& inData)
//----------------------------------------------------------------------------------------
{
    mDescriptorString.CopyFrom(inData.get(), inData.Length());
}

//----------------------------------------------------------------------------------------
void nsPersistentFileDescriptor::GetData(nsAFlatCString& outData) const
//----------------------------------------------------------------------------------------
{
    outData.Assign(mDescriptorString, mDescriptorString.Length());
}