C++ raise_warning函数代码示例

static Variant new_socket_connect(const HostURL &hosturl, double timeout,
                                  Variant &errnum, Variant &errstr) {
  int domain = AF_UNSPEC;
  int type = SOCK_STREAM;
  auto const& scheme = hosturl.getScheme();
  SmartPtr<Socket> sock;
  SmartPtr<SSLSocket> sslsock;
  std::string sockerr;
  int error;

  if (scheme == "udp" || scheme == "udg") {
    type = SOCK_DGRAM;
  } else if (scheme == "unix") {
    domain = AF_UNIX;
  }

  int fd = -1;
  if (domain == AF_UNIX) {
    sockaddr_storage sa_storage;
    struct sockaddr *sa_ptr;
    size_t sa_size;

    fd = socket(domain, type, 0);
    sock = makeSmartPtr<Socket>(
      fd, domain, hosturl.getHost().c_str(), hosturl.getPort());

    if (!set_sockaddr(sa_storage, sock, hosturl.getHost().c_str(),
                      hosturl.getPort(), sa_ptr, sa_size)) {
      // set_sockaddr raises its own warning on failure
      return false;
    }
    if (connect_with_timeout(fd, sa_ptr, sa_size, timeout,
                             hosturl, sockerr, error) != 0) {
      SOCKET_ERROR(sock, sockerr.c_str(), error);
      errnum = sock->getLastError();
      errstr = HHVM_FN(socket_strerror)(sock->getLastError());
      return false;
    }
  } else {
    struct addrinfo hints;
    memset(&hints, 0, sizeof(hints));
    hints.ai_family   = domain;
    hints.ai_socktype = type;

    auto port = folly::to<std::string>(hosturl.getPort());
    auto host = hosturl.getHost();

    struct addrinfo *aiHead;
    int errcode = getaddrinfo(host.c_str(), port.c_str(), &hints, &aiHead);
    if (errcode != 0) {
      errstr = String(gai_strerror(errcode), CopyString);
      return false;
    }
    SCOPE_EXIT { freeaddrinfo(aiHead); };

    for (struct addrinfo *ai = aiHead; ai != nullptr; ai = ai->ai_next) {
      domain = ai->ai_family;
      fd = socket(domain, ai->ai_socktype, ai->ai_protocol);
      if (fd == -1) {
        continue;
      }

      if (connect_with_timeout(fd, ai->ai_addr, ai->ai_addrlen, timeout,
                               hosturl, sockerr, error) == 0) {
        break;
      }
      close(fd);
      fd = -1;
    }

    sslsock = SSLSocket::Create(fd, domain, hosturl, timeout);
    if (sslsock) {
      sock = sslsock;
    } else {
      sock = makeSmartPtr<Socket>(fd,
                                  domain,
                                  hosturl.getHost().c_str(),
                                  hosturl.getPort());
    }
  }

  if (!sock->valid()) {
    SOCKET_ERROR(sock,
        sockerr.empty() ? "unable to create socket" : sockerr.c_str(), error);
    errnum = sock->getLastError();
    errstr = HHVM_FN(socket_strerror)(sock->getLastError());
    return false;
  }

  if (sslsock && !sslsock->onConnect()) {
    raise_warning("Failed to enable crypto");
    return false;
  }

  return Variant(std::move(sock));
}

  Variant appendOrPrependFilter(const Resource& stream,
                 const String& filtername,
                 const Variant& readwrite,
                 const Variant& params,
                 bool append) {
    const char* func_name =
      append ? "stream_filter_append()" : "stream_filter_prepend()";

    if (!m_registeredFilters.exists(filtername)) {
      raise_warning("%s: unable to locate filter \"%s\"",
                    func_name,
                    filtername.data());
      return false;
    }

    auto file = cast<File>(stream);
    int mode = readwrite.toInt32();
    if (!mode) {
      auto str = file->getMode();
      /* The documentation says a read filter is only created for 'r' and '+'
       * modes, but the implementation will always create one unless
       * STREAM_FILTER_WRITE is passed.
       *
       * This branch is only executed if no STREAM_FILTER* args were passed,
       * so we always create a READ filter.
       */
      mode = k_STREAM_FILTER_READ;
      if (str.find('+') != -1 || str.find('w') != -1 || str.find('a') != -1) {
        mode |= k_STREAM_FILTER_WRITE;
      }
    }
    if (!(mode & k_STREAM_FILTER_ALL)) {
      return false;
    }

    // If it's ALL we create two resources, but only return one - this
    // matches Zend, and is the documented behavior.
    req::ptr<StreamFilter> ret;
    if (mode & k_STREAM_FILTER_READ) {
      auto resource = createInstance(func_name,
                                     file,
                                     filtername,
                                     params);
      if (!resource) {
        return false;
      }
      ret = resource;
      if (append) {
        file->appendReadFilter(resource);
      } else {
        file->prependReadFilter(resource);
      }
    }
    if (mode & k_STREAM_FILTER_WRITE) {
      auto resource = createInstance(func_name,
                                     file,
                                     filtername,
                                     params);
      if (!resource) {
        return false;
      }
      ret = resource;
      if (append) {
        file->appendWriteFilter(resource);
      } else {
        file->prependWriteFilter(resource);
      }
    }
    return Variant(std::move(ret));
  }

static Variant warn_non_object() {
    raise_warning("Cannot access property on non-object");
    return null;
}

bool HttpProtocol::ProxyRequest(Transport *transport, bool force,
                                const std::string &url,
                                int &code, std::string &error,
                                StringBuffer &response,
                                HeaderMap *extraHeaders /* = NULL */) {
  ASSERT(transport);
  if (transport->headersSent()) {
    raise_warning("Cannot proxy request - headers already sent");
    return false;
  }

  HeaderMap requestHeaders;
  transport->getHeaders(requestHeaders);
  if (extraHeaders) {
    for (HeaderMap::const_iterator iter = extraHeaders->begin();
         iter != extraHeaders->end(); ++iter) {
      vector<string> &values = requestHeaders[iter->first];
      values.insert(values.end(), iter->second.begin(), iter->second.end());
    }
  }

  int size = 0;
  const char *data = NULL;
  if (transport->getMethod() == Transport::POST) {
    data = (const char *)transport->getPostData(size);
  }

  code = 0; // HTTP status of curl or 0 for "no server response code"
  vector<String> responseHeaders;
  HttpClient http;
  if (data && size) {
    code = http.post(url.c_str(), data, size, response, &requestHeaders,
                     &responseHeaders);
  } else {
    code = http.get(url.c_str(), response, &requestHeaders, &responseHeaders);
  }
  if (code == 0) {
    if (!force) return false; // so we can retry
    Logger::Error("Unable to proxy %s: %s", url.c_str(),
                  http.getLastError().c_str());
    error = http.getLastError();
    return true;
  }

  for (unsigned int i = 0; i < responseHeaders.size(); i++) {
    String &header = responseHeaders[i];
    if (header.find(":") != String::npos &&
        header.find("Content-Length: ") != 0 &&
        header.find("Client-Transfer-Encoding: ") != 0 &&
        header.find("Transfer-Encoding: ") != 0 &&
        header.find("Connection: ") != 0) {
      transport->addHeader(header.data());
    }
  }
  const char* respData = response.data();
  if (!respData) {
    respData = "";
  }
  Logger::Verbose("Response code was %d when proxying %s", code, url.c_str());
  return true;
}

static void HHVM_FUNCTION(gc_enable) {
  if (RuntimeOption::EnableHipHopSyntax) {
    raise_warning("HipHop currently does not support circular reference "
                  "collection");
  }
}

bool SSLSocket::handleError(int64_t nr_bytes, bool is_init) {
  char esbuf[512];
  std::string ebuf;
  unsigned long ecode;

  bool retry = true;
  int err = SSL_get_error(m_data->m_handle, nr_bytes);
  switch (err) {
  case SSL_ERROR_ZERO_RETURN:
    /* SSL terminated (but socket may still be active) */
    retry = false;
    break;
  case SSL_ERROR_WANT_READ:
  case SSL_ERROR_WANT_WRITE:
    /* re-negotiation, or perhaps the SSL layer needs more
     * packets: retry in next iteration */
    errno = EAGAIN;
    retry = (is_init || m_data->m_is_blocked);
    break;
  case SSL_ERROR_SYSCALL:
    if (ERR_peek_error() == 0) {
      if (nr_bytes == 0) {
        if (ERR_get_error()) {
          raise_warning("SSL: fatal protocol error");
        }
        SSL_set_shutdown(m_data->m_handle,
                         SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
        setEof(true);
        retry = false;
      } else {
        raise_warning("SSL: %s", folly::errnoStr(errno).c_str());
        retry = false;
      }
      break;
    }
    /* fall through */
  default:
    /* some other error */
    ecode = ERR_get_error();
    switch (ERR_GET_REASON(ecode)) {
    case SSL_R_NO_SHARED_CIPHER:
      raise_warning("SSL_R_NO_SHARED_CIPHER: no suitable shared cipher "
                    "could be used.  This could be because the server is "
                    "missing an SSL certificate (local_cert context "
                    "option)");
      retry = false;
      break;

    default:
      do {
        // NULL is automatically added
        ERR_error_string_n(ecode, esbuf, sizeof(esbuf));
        if (!ebuf.empty()) {
          ebuf += '\n';
        }
        ebuf += esbuf;
      } while ((ecode = ERR_get_error()) != 0);

      raise_warning("SSL operation failed with code %d. %s%s",
                    err, !ebuf.empty() ? "OpenSSL Error messages:\n" : "",
                    !ebuf.empty() ? ebuf.c_str() : "");
    }

    retry = false;
    errno = 0;
  }

  return retry;
}

bool SSLSocket::applyVerificationPolicy(X509 *peer) {
  /* verification is turned off */
  if (!m_context[s_verify_peer].toBoolean()) {
    return true;
  }

  if (peer == nullptr) {
    raise_warning("Could not get peer certificate");
    return false;
  }

  int err = SSL_get_verify_result(m_data->m_handle);
  switch (err) {
  case X509_V_OK:
    /* fine */
    break;
  case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
    if (m_context[s_allow_self_signed].toBoolean()) {
      /* allowed */
      break;
    }
    /* not allowed, so fall through */
  default:
    raise_warning("Could not verify peer: code:%d %s", err,
                  X509_verify_cert_error_string(err));
    return false;
  }

  /* if the cert passed the usual checks, apply our own local policies now */

  /* Does the common name match ? (used primarily for https://) */
  String cnmatch = m_context[s_CN_match].toString();
  if (!cnmatch.empty()) {
    X509_NAME *name = X509_get_subject_name(peer);
    char buf[1024];
    int name_len = X509_NAME_get_text_by_NID(name, NID_commonName, buf,
                                             sizeof(buf));

    if (name_len < 0) {
      raise_warning("Unable to locate peer certificate CN");
      return false;
    } else if (name_len != (int)strlen(buf)) {
      raise_warning("Peer certificate CN=`%.*s' is malformed", name_len, buf);
      return false;
    }

    bool match = (strcmp(cnmatch.c_str(), buf) == 0);
    if (!match && strlen(buf) > 3 && buf[0] == '*' && buf[1] == '.') {
      /* Try wildcard */
      if (strchr(buf+2, '.')) {
        const char* cnmatch_str = cnmatch.c_str();
        const char *tmp = strstr(cnmatch_str, buf+1);
        match = tmp && strcmp(tmp, buf+2) && tmp == strchr(cnmatch_str, '.');
      }
    }

    if (!match) {
      /* didn't match */
      raise_warning("Peer certificate CN=`%.*s' did not match expected CN=`%s'",
                    name_len, buf, cnmatch.c_str());
      return false;
    }
  }

  return true;
}

void f_hphp_thread_set_warmup_enabled() {
  raise_warning("hphp_thread_set_warmup_enabled is deprecated, to enable "
                "the RequestInitFunction and RequestInitDocument features "
                "please set Server.EnableMemoryManager=true in your HipHop "
                "config");
}

static bool yaf_route_map_route(const Object& o, const Object& request)
{
    auto ptr_uri = request->o_realProp(YAF_REQUEST_PROPERTY_NAME_URI, 
            ObjectData::RealPropUnchecked, "Yaf_Request_Abstract");

    auto ptr_base_uri = request->o_realProp(YAF_REQUEST_PROPERTY_NAME_BASE, 
            ObjectData::RealPropUnchecked, "Yaf_Request_Abstract");

    auto ptr_ctl_prefer = o->o_realProp(YAF_ROUTE_MAP_VAR_NAME_CTL_PREFER, 
             ObjectData::RealPropUnchecked, "Yaf_Route_Map");

    auto ptr_delim = o->o_realProp(YAF_ROUTE_MAP_VAR_NAME_DELIMETER, 
             ObjectData::RealPropUnchecked, "Yaf_Route_Map");

    if (ptr_uri == NULL) {
        raise_warning("invalid uri:%p", ptr_uri);
        return false;
    }

    std::string req_uri;
    if (ptr_uri && ptr_uri->isString() && 
        ptr_base_uri && 
        ptr_base_uri->isString()&&
        strncasecmp(ptr_uri->toString().c_str(), 
            ptr_base_uri->toString().c_str(), ptr_base_uri->toString().length()) == 0) {
        req_uri = std::string(ptr_uri->toString().c_str() + ptr_base_uri->toString().length()); 
    } else {
        req_uri = std::string(ptr_uri->toString().c_str());
    }

    if (req_uri.length() == 0) {
        return false;
    }

    std::string str_query_str;
    if (ptr_delim->isString() && ptr_delim->toString().length()) {
        const char* str_delim = ptr_delim->toString().c_str();
        char* tmp_req_uri = strdup(req_uri.c_str());
        char* query_str = strstr(tmp_req_uri, str_delim);
        if (query_str && *(query_str - 1) == '/') {
            char* rest = query_str + strlen(str_delim);
            if (*rest == '\0') {
                req_uri = std::string(req_uri, query_str - tmp_req_uri);
                query_str = NULL;
            } else if(*rest == '/') {
                req_uri = std::string(req_uri, query_str - tmp_req_uri);
                str_query_str  = std::string(rest);
            } else {
                query_str = NULL;
            }
        }
        
        free(tmp_req_uri);
    }

    std::string route_result;
    char* save_ptr = NULL;
    char* tmp = strdup(req_uri.c_str());
    char* seg = strtok_r(tmp, YAF_ROUTER_URL_DELIMIETER, &save_ptr);
    while (seg) {
        int seg_len = strlen(seg);
        if (seg_len) {
            route_result += seg;
        }

        route_result += "_";
        seg = strtok_r(NULL, YAF_ROUTER_URL_DELIMIETER, &save_ptr);
    }

    free(tmp);
    if (route_result.length()) {
        if (route_result[route_result.length() - 1] == '_') {
            route_result.pop_back();
        }

        if (ptr_ctl_prefer->toBoolean()) {
            auto ptr_controller = request->o_realProp(YAF_REQUEST_PROPERTY_NAME_CONTROLLER, 
                        ObjectData::RealPropUnchecked, "Yaf_Request_Abstract");
            *ptr_controller = String(route_result);
        } else {
            auto ptr_action = request->o_realProp(YAF_REQUEST_PROPERTY_NAME_ACTION, 
                        ObjectData::RealPropUnchecked, "Yaf_Request_Abstract");
            *ptr_action = String(route_result);
        }
    }

    if (str_query_str.length()) {
        Array arr = yaf_router_parse_parameters(str_query_str.c_str()); 
        yaf_request_set_params_multi(&request, arr);
    }

    return true;
}

void _xml_characterDataHandler(void *userData, const XML_Char *s, int len) {
  auto parser = getParserFromToken(userData);

  if (parser) {
    Variant retval;
    Array args = Array::Create();

    if (parser->characterDataHandler.toBoolean()) {
      args.append(Variant(parser));
      args.append(_xml_xmlchar_zval(s, len, parser->target_encoding));
      xml_call_handler(parser, parser->characterDataHandler, args);
    }

    if (!parser->data.isNull()) {
      int i;
      int doprint = 0;

      String decoded_value;
      int decoded_len;
      decoded_value = xml_utf8_decode(s,len,
                                          parser->target_encoding);
      decoded_len = decoded_value.size();
      for (i = 0; i < decoded_len; i++) {
        switch (decoded_value[i]) {
        case ' ':
        case '\t':
        case '\n':
        default:
          doprint = 1;
          break;
        }
        if (doprint) {
          break;
        }
      }
      if (doprint || (! parser->skipwhite)) {
        if (parser->lastwasopen) {
          String myval;
          // check if value exists, if yes append to that
          if (parser->ctag.toArrRef().exists(s_value)) {
            myval = tvCastToString(parser->ctag.toArray().rvalAt(s_value).tv());
            myval += decoded_value;
            parser->ctag.toArrRef().set(s_value, myval);
          } else {
            parser->ctag.toArrRef().set(
              s_value,
              decoded_value
            );
          }
        } else {
          Array tag;
          String myval;
          String mytype;

          auto curtag = parser->data.toArrRef().pop();
          SCOPE_EXIT {
            try {
              parser->data.toArrRef().append(curtag);
            } catch (...) {}
          };

          if (curtag.toArrRef().exists(s_type)) {
            mytype = tvCastToString(curtag.toArrRef().rvalAt(s_type).tv());
            if (!strcmp(mytype.data(), "cdata") &&
                curtag.toArrRef().exists(s_value)) {
              myval = tvCastToString(curtag.toArrRef().rvalAt(s_value).tv());
              myval += decoded_value;
              curtag.toArrRef().set(s_value, myval);
              return;
            }
          }
          if (parser->level <= XML_MAXLEVEL && parser->level > 0) {
            tag = Array::Create();
            _xml_add_to_info(parser, parser->ltags[parser->level-1] +
                             parser->toffset);
            tag.set(s_tag, String(parser->ltags[parser->level-1] +
                                  parser->toffset, CopyString));
            tag.set(s_value, decoded_value);
            tag.set(s_type, s_cdata);
            tag.set(s_level, parser->level);
            parser->data.toArrRef().append(tag);
          } else if (parser->level == (XML_MAXLEVEL + 1)) {
            raise_warning("Maximum depth exceeded - Results truncated");
          }
        }
      }
    }
  }

void raiseWarning(const StringData* sd) {
  raise_warning("%s", sd->data());
}

//.........这里部分代码省略.........
      // deserialize data that was serialized before the migration of
      // collections to the HH namespace.

      if (type != 'O') {
        // Collections are CPP builtins; don't attempt to autoload
        cls = Unit::getClass(clsName.get(), /* autoload */ false);
        if (!cls) {
          cls = tryAlternateCollectionClass(clsName.get());
        }
      } else if (allowObjectFormatForCollections) {
        // In order to support the legacy {O|V}:{Set|Vector|Map}
        // serialization, we defer autoloading until we know that there's
        // no alternate (builtin) collection class.
        cls = Unit::getClass(clsName.get(), /* autoload */ false);
        if (!cls) {
          cls = tryAlternateCollectionClass(clsName.get());
        }
        if (!cls) {
          cls = Unit::loadClass(clsName.get()); // with autoloading
        }
      } else {
        cls = Unit::loadClass(clsName.get()); // with autoloading
      }

      Object obj;
      if (RuntimeOption::UnserializationWhitelistCheck &&
          (type == 'O') &&
          !uns->isWhitelistedClass(clsName)) {
        const char* err_msg =
          "The object being unserialized with class name '%s' "
          "is not in the given whitelist. "
          "See http://fburl.com/SafeSerializable for more detail";
        if (RuntimeOption::UnserializationWhitelistCheckWarningOnly) {
          raise_warning(err_msg, clsName.c_str());
        } else {
          raise_error(err_msg, clsName.c_str());
        }
      }
      if (cls) {
        // Only unserialize CPP extension types which can actually
        // support it. Otherwise, we risk creating a CPP object
        // without having it initialized completely.
        if (cls->instanceCtor() && !cls->isCppSerializable()) {
          obj = ObjectData::newInstance(
            SystemLib::s___PHP_Unserializable_ClassClass);
          obj->o_set(s_PHP_Unserializable_Class_Name, clsName);
        } else {
          obj = ObjectData::newInstance(cls);
          if (UNLIKELY(cls == c_Pair::classof() && size != 2)) {
            throw Exception("Pair objects must have exactly 2 elements");
          }
        }
      } else {
        obj = ObjectData::newInstance(
          SystemLib::s___PHP_Incomplete_ClassClass);
        obj->o_set(s_PHP_Incomplete_Class_Name, clsName);
      }
      operator=(obj);

      if (size > 0) {
        if (type == 'O') {
          // Collections are not allowed
          if (obj->isCollection()) {
            if (size > 0) {
              throw Exception("%s does not support the 'O' serialization "
                              "format", clsName.data());

Variant HHVM_FUNCTION(socket_select,
                      VRefParam read,
                      VRefParam write,
                      VRefParam except,
                      const Variant& vtv_sec,
                      int tv_usec /* = 0 */) {
  int count = 0;
  if (!read.isNull()) {
    count += read.toArray().size();
  }
  if (!write.isNull()) {
    count += write.toArray().size();
  }
  if (!except.isNull()) {
    count += except.toArray().size();
  }
  if (!count) {
    return false;
  }

  struct pollfd *fds = (struct pollfd *)calloc(count, sizeof(struct pollfd));
  count = 0;
  if (!read.isNull()) {
    sock_array_to_fd_set(read.toArray(), fds, count, POLLIN);
  }
  if (!write.isNull()) {
    sock_array_to_fd_set(write.toArray(), fds, count, POLLOUT);
  }
  if (!except.isNull()) {
    sock_array_to_fd_set(except.toArray(), fds, count, POLLPRI);
  }
  if (!count) {
    raise_warning("no resource arrays were passed to select");
    free(fds);
    return false;
  }

  IOStatusHelper io("socket_select");
  int timeout_ms = -1;
  if (!vtv_sec.isNull()) {
    timeout_ms = vtv_sec.toInt32() * 1000 + tv_usec / 1000;
  }

  /* slight hack to support buffered data; if there is data sitting in the
   * read buffer of any of the streams in the read array, let's pretend
   * that we selected, but return only the readable sockets */
  if (!read.isNull()) {
    auto hasData = Array::Create();
    for (ArrayIter iter(read.toArray()); iter; ++iter) {
      auto file = cast<File>(iter.second());
      if (file->bufferedLen() > 0) {
        hasData.append(iter.second());
      }
    }
    if (hasData.size() > 0) {
      if (!write.isNull()) {
        write = empty_array();
      }
      if (!except.isNull()) {
        except = empty_array();
      }
      read = hasData;
      free(fds);
      return hasData.size();
    }
  }

  int retval = poll(fds, count, timeout_ms);
  if (retval == -1) {
    raise_warning("unable to select [%d]: %s", errno,
                  folly::errnoStr(errno).c_str());
    free(fds);
    return false;
  }

  count = 0;
  int nfds = 0;
  if (!read.isNull()) {
    sock_array_from_fd_set(read, fds, nfds, count, POLLIN|POLLERR|POLLHUP);
  }
  if (!write.isNull()) {
    sock_array_from_fd_set(write, fds, nfds, count, POLLOUT|POLLERR);
  }
  if (!except.isNull()) {
    sock_array_from_fd_set(except, fds, nfds, count, POLLPRI|POLLERR);
  }

  free(fds);
  return count;
}

static Variant php_mcrypt_do_crypt(CStrRef cipher, CStrRef key, CStrRef data,
                                   CStrRef mode, CStrRef iv, bool dencrypt) {
  MCRYPT td = mcrypt_module_open((char*)cipher.data(),
                                 (char*)MCG(algorithms_dir).data(),
                                 (char*)mode.data(),
                                 (char*)MCG(modes_dir).data());
  if (td == MCRYPT_FAILED) {
    raise_warning(MCRYPT_OPEN_MODULE_FAILED);
    return false;
  }

  /* Checking for key-length */
  int max_key_length = mcrypt_enc_get_key_size(td);
  if (key.size() > max_key_length) {
    raise_warning("Size of key is too large for this algorithm");
  }
  int count;
  int *key_length_sizes = mcrypt_enc_get_supported_key_sizes(td, &count);
  int use_key_length;
  char *key_s = NULL;
  if (count == 0 && key_length_sizes == NULL) { // all lengths 1 - k_l_s = OK
    use_key_length = key.size();
    key_s = (char*)malloc(use_key_length);
    memcpy(key_s, key.data(), use_key_length);
  } else if (count == 1) {  /* only m_k_l = OK */
    key_s = (char*)malloc(key_length_sizes[0]);
    memset(key_s, 0, key_length_sizes[0]);
    memcpy(key_s, key.data(), MIN(key.size(), key_length_sizes[0]));
    use_key_length = key_length_sizes[0];
  } else { /* dertermine smallest supported key > length of requested key */
    use_key_length = max_key_length; /* start with max key length */
    for (int i = 0; i < count; i++) {
      if (key_length_sizes[i] >= key.size() &&
          key_length_sizes[i] < use_key_length) {
        use_key_length = key_length_sizes[i];
      }
    }
    key_s = (char*)malloc(use_key_length);
    memset(key_s, 0, use_key_length);
    memcpy(key_s, key.data(), MIN(key.size(), use_key_length));
  }
  mcrypt_free(key_length_sizes);

  /* Check IV */
  char *iv_s = NULL;
  int iv_size = mcrypt_enc_get_iv_size(td);

  /* IV is required */
  if (mcrypt_enc_mode_has_iv(td) == 1) {
    if (!iv.empty()) {
      if (iv_size != iv.size()) {
        raise_warning("The IV parameter must be as long as the blocksize");
      } else {
        iv_s = (char*)malloc(iv_size + 1);
        memcpy(iv_s, iv.data(), iv_size);
      }
    } else {
      raise_warning("Attempt to use an empty IV, which is NOT recommended");
      iv_s = (char*)malloc(iv_size + 1);
      memset(iv_s, 0, iv_size + 1);
    }
  }

  int block_size;
  unsigned long int data_size;
  String s;
  char *data_s;
  /* Check blocksize */
  if (mcrypt_enc_is_block_mode(td) == 1) { /* It's a block algorithm */
    block_size = mcrypt_enc_get_block_size(td);
    data_size = (((data.size() - 1) / block_size) + 1) * block_size;
    s = String(data_size, ReserveString);
    data_s = (char*)s.mutableSlice().ptr;
    memset(data_s, 0, data_size);
    memcpy(data_s, data.data(), data.size());
  } else { /* It's not a block algorithm */
    data_size = data.size();
    s = String(data_size, ReserveString);
    data_s = (char*)s.mutableSlice().ptr;
    memcpy(data_s, data.data(), data.size());
  }

  if (mcrypt_generic_init(td, key_s, use_key_length, iv_s) < 0) {
    raise_warning("Mcrypt initialisation failed");
    return false;
  }
  if (dencrypt) {
    mdecrypt_generic(td, data_s, data_size);
  } else {
    mcrypt_generic(td, data_s, data_size);
  }

  /* freeing vars */
  mcrypt_generic_end(td);
  if (key_s != NULL) {
    free(key_s);
  }
  if (iv_s != NULL) {
    free(iv_s);
  }
//.........这里部分代码省略.........

void f_gc_disable() {
  raise_warning("HipHop currently does not support circular reference "
                "collection");
}