C++ cupsArrayAdd函数代码示例

static help_word_t *			/* O - New word */
help_add_word(help_node_t *n,		/* I - Node */
              const char  *text)	/* I - Word text */
{
  help_word_t	*w,			/* New word */
		key;			/* Search key */


  DEBUG_printf(("2help_add_word(n=%p, text=\"%s\")", n, text));

 /*
  * Create the words array as needed...
  */

  if (!n->words)
    n->words = cupsArrayNew((cups_array_func_t)help_sort_words, NULL);

 /*
  * See if the word is already added...
  */

  key.text = (char *)text;

  if ((w = (help_word_t *)cupsArrayFind(n->words, &key)) == NULL)
  {
   /*
    * Create a new word...
    */

    if ((w = calloc(1, sizeof(help_word_t))) == NULL)
      return (NULL);

    if ((w->text = strdup(text)) == NULL)
    {
      free(w);
      return (NULL);
    }

    cupsArrayAdd(n->words, w);
  }

 /*
  * Bump the counter for this word and return it...
  */

  w->count ++;

  return (w);
}

_pwg_media_t *				/* O - Matching size or NULL */
_pwgMediaForLegacy(
    const char *legacy)			/* I - Legacy size name */
{
  _pwg_media_t	key;			/* Search key */
  _cups_globals_t *cg = _cupsGlobals();	/* Global data */


 /*
  * Range check input...
  */

  if (!legacy)
    return (NULL);

 /*
  * Build the lookup table for PWG names as needed...
  */

  if (!cg->leg_size_lut)
  {
    int			i;		/* Looping var */
    _pwg_media_t	*size;		/* Current size */

    cg->leg_size_lut = cupsArrayNew((cups_array_func_t)pwg_compare_legacy,
                                    NULL);

    for (i = (int)(sizeof(cups_pwg_media) / sizeof(cups_pwg_media[0])),
             size = (_pwg_media_t *)cups_pwg_media;
	 i > 0;
	 i --, size ++)
      if (size->legacy)
	cupsArrayAdd(cg->leg_size_lut, size);
  }

 /*
  * Lookup the name...
  */

  key.legacy = legacy;
  return ((_pwg_media_t *)cupsArrayFind(cg->leg_size_lut, &key));
}

static void
dnssdRegisterCallback(
    DNSServiceRef	sdRef,		/* I - DNS Service reference */
    DNSServiceFlags	flags,		/* I - Reserved for future use */
    DNSServiceErrorType	errorCode,	/* I - Error code */
    const char		*name,     	/* I - Service name */
    const char		*regtype,  	/* I - Service type */
    const char		*domain,   	/* I - Domain. ".local" for now */
    void		*context)	/* I - Printer */
{
  cupsd_printer_t *p = (cupsd_printer_t *)context;
					/* Current printer */


  (void)sdRef;
  (void)flags;
  (void)domain;

  cupsdLogMessage(CUPSD_LOG_DEBUG2, "dnssdRegisterCallback(%s, %s) for %s (%s)",
                  name, regtype, p ? p->name : "Web Interface",
		  p ? (p->reg_name ? p->reg_name : "(null)") : "NA");

  if (errorCode)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR,
		    "DNSServiceRegister failed with error %d", (int)errorCode);
    return;
  }
  else if (p && (!p->reg_name || _cups_strcasecmp(name, p->reg_name)))
  {
    cupsdLogMessage(CUPSD_LOG_INFO, "Using service name \"%s\" for \"%s\"",
                    name, p->name);

    cupsArrayRemove(DNSSDPrinters, p);
    cupsdSetString(&p->reg_name, name);
    cupsArrayAdd(DNSSDPrinters, p);

    LastEvent |= CUPSD_EVENT_PRINTER_MODIFIED;
  }
}

static cups_array_t *			/* O - Array of format strings */
collect_formats(const char *id)		/* I - msgid string */
{
  cups_array_t	*fmts;			/* Array of format strings */
  char		buf[255],		/* Format string buffer */
		*bufptr;		/* Pointer into format string */


  fmts = cupsArrayNew(NULL, NULL);

  while ((id = strchr(id, '%')) != NULL)
  {
    if (id[1] == '%')
    {
     /*
      * Skip %%...
      */

      id += 2;
      continue;
    }

    for (bufptr = buf; *id && bufptr < (buf + sizeof(buf) - 1); id ++)
    {
      *bufptr++ = *id;

      if (strchr("CDEFGIOSUXcdeifgopsux", *id))
      {
        id ++;
        break;
      }
    }

    *bufptr = '\0';
    cupsArrayAdd(fmts, strdup(buf));
  }

  return (fmts);
}

static const char *			/* O - Full path to filter or NULL */
mime_add_fcache(
    cups_array_t *filtercache,		/* I - Filter cache */
    const char   *name,			/* I - Filter name */
    const char   *filterpath)		/* I - Filter path */
{
  _mime_fcache_t	key,		/* Search key */
			*temp;		/* New filter cache */
  char			path[1024];	/* Full path to filter */


  DEBUG_printf(("2mime_add_fcache(filtercache=%p, name=\"%s\", "
                "filterpath=\"%s\")", filtercache, name, filterpath));

  key.name = (char *)name;
  if ((temp = (_mime_fcache_t *)cupsArrayFind(filtercache, &key)) != NULL)
  {
    DEBUG_printf(("3mime_add_fcache: Returning \"%s\".", temp->path));
    return (temp->path);
  }

  if ((temp = calloc(1, sizeof(_mime_fcache_t))) == NULL)
  {
    DEBUG_puts("3mime_add_fcache: Returning NULL.");
    return (NULL);
  }

  temp->name = strdup(name);

  if (cupsFileFind(name, filterpath, 1, path, sizeof(path)))
    temp->path = strdup(path);

  cupsArrayAdd(filtercache, temp);

  DEBUG_printf(("3mime_add_fcache: Returning \"%s\".", temp->path));
  return (temp->path);
}

static int				/* O - 1 on success, 0 on failure */
load_words(const char   *filename,	/* I - File to load */
           cups_array_t *array)		/* I - Array to add to */
{
  FILE		*fp;			/* Test file */
  char		word[256];		/* Word from file */


  if ((fp = fopen(filename, "r")) == NULL)
  {
    perror(filename);
    return (0);
  }

  while (fscanf(fp, "%255s", word) == 1)
  {
    if (!cupsArrayFind(array, word))
      cupsArrayAdd(array, strdup(word));
  }

  fclose(fp);

  return (1);
}

cups_array_t *				/* O - Languages array */
_ppdGetLanguages(ppd_file_t *ppd)	/* I - PPD file */
{
  cups_array_t	*languages;		/* Languages array */
  ppd_attr_t	*attr;			/* cupsLanguages attribute */
  char		*value,			/* Copy of attribute value */
		*start,			/* Start of current language */
		*ptr;			/* Pointer into languages */


 /*
  * See if we have a cupsLanguages attribute...
  */

  if ((attr = ppdFindAttr(ppd, "cupsLanguages", NULL)) == NULL || !attr->value)
    return (NULL);

 /*
  * Yes, load the list...
  */

  if ((languages = cupsArrayNew((cups_array_func_t)strcmp, NULL)) == NULL)
    return (NULL);

  if ((value = strdup(attr->value)) == NULL)
  {
    cupsArrayDelete(languages);
    return (NULL);
  }

  for (ptr = value; *ptr;)
  {
   /*
    * Skip leading whitespace...
    */

    while (_cups_isspace(*ptr))
      ptr ++;

    if (!*ptr)
      break;

   /*
    * Find the end of this language name...
    */

    for (start = ptr; *ptr && !_cups_isspace(*ptr); ptr ++);

    if (*ptr)
      *ptr++ = '\0';

    if (!strcmp(start, "en"))
      continue;

    cupsArrayAdd(languages, strdup(start));
  }

 /*
  * Free the temporary string and return either an array with one or more
  * values or a NULL pointer...
  */

  free(value);

  if (cupsArrayCount(languages) == 0)
  {
    cupsArrayDelete(languages);
    return (NULL);
  }
  else
    return (languages);
}

//.........这里部分代码省略.........

    *ptr = '\0';

   /*
    * Find start of value...
    */

    if ((ptr = strchr(s, '\"')) == NULL)
      continue;

    ptr ++;

   /*
    * Unquote the text...
    */

    if (unquote)
      cups_unquote(ptr, ptr);

   /*
    * Create or add to a message...
    */

    if (!strncmp(s, "msgid", 5))
    {
     /*
      * Add previous message as needed...
      */

      if (m)
      {
        if (m->str && m->str[0])
        {
          cupsArrayAdd(a, m);
        }
        else
        {
         /*
          * Translation is empty, don't add it... (STR #4033)
          */

          free(m->id);
          if (m->str)
            free(m->str);
          free(m);
        }
      }

     /*
      * Create a new message with the given msgid string...
      */

      if ((m = (_cups_message_t *)calloc(1, sizeof(_cups_message_t))) == NULL)
      {
        cupsFileClose(fp);
	return (a);
      }

      if ((m->id = strdup(ptr)) == NULL)
      {
        free(m);
        cupsFileClose(fp);
	return (a);
      }
    }
    else if (s[0] == '\"' && m)

//.........这里部分代码省略.........
	  else
	    value = choice;
	}
        else if ((value = cupsGetOption(constptr->option->keyword, num_options,
	                                options)) != NULL)
        {
	  if (!_cups_strncasecmp(value, "Custom.", 7))
	    value = "Custom";
	}
        else if (constptr->choice->marked)
	  value = constptr->choice->choice;
	else
	  value = NULL;

       /*
        * Now check AP_FIRSTPAGE_option...
	*/

        snprintf(firstpage, sizeof(firstpage), "AP_FIRSTPAGE_%s",
	         constptr->option->keyword);

        if (option && choice && !_cups_strcasecmp(option, firstpage))
	{
	  if (!_cups_strncasecmp(choice, "Custom.", 7))
	    firstvalue = "Custom";
	  else
	    firstvalue = choice;
	}
        else if ((firstvalue = cupsGetOption(firstpage, num_options,
	                                     options)) != NULL)
        {
	  if (!_cups_strncasecmp(firstvalue, "Custom.", 7))
	    firstvalue = "Custom";
	}
	else
	  firstvalue = NULL;

        DEBUG_printf(("9ppd_test_constraints: value=%s, firstvalue=%s", value,
	              firstvalue));

        if ((!value || _cups_strcasecmp(value, constptr->choice->choice)) &&
	    (!firstvalue || _cups_strcasecmp(firstvalue, constptr->choice->choice)))
	{
	  DEBUG_puts("9ppd_test_constraints: NO");
	  break;
	}
      }
      else if (option && choice &&
               !_cups_strcasecmp(option, constptr->option->keyword))
      {
	if (!_cups_strcasecmp(choice, "None") || !_cups_strcasecmp(choice, "Off") ||
	    !_cups_strcasecmp(choice, "False"))
	{
	  DEBUG_puts("9ppd_test_constraints: NO");
	  break;
	}
      }
      else if ((value = cupsGetOption(constptr->option->keyword, num_options,
				      options)) != NULL)
      {
	if (!_cups_strcasecmp(value, "None") || !_cups_strcasecmp(value, "Off") ||
	    !_cups_strcasecmp(value, "False"))
	{
	  DEBUG_puts("9ppd_test_constraints: NO");
	  break;
	}
      }
      else
      {
	key.option = constptr->option;

	if ((marked = (ppd_choice_t *)cupsArrayFind(ppd->marked, &key))
		== NULL ||
	    (!_cups_strcasecmp(marked->choice, "None") ||
	     !_cups_strcasecmp(marked->choice, "Off") ||
	     !_cups_strcasecmp(marked->choice, "False")))
	{
	  DEBUG_puts("9ppd_test_constraints: NO");
	  break;
	}
      }
    }

    if (i <= 0)
    {
      if (!active)
        active = cupsArrayNew(NULL, NULL);

      cupsArrayAdd(active, consts);
      DEBUG_puts("9ppd_test_constraints: Added...");
    }
  }

  cupsArrayRestore(ppd->marked);

  DEBUG_printf(("8ppd_test_constraints: Found %d active constraints!",
                cupsArrayCount(active)));

  return (active);
}

static cups_device_t *			/* O - Device */
get_device(cups_array_t *devices,	/* I - Device array */
           const char   *serviceName,	/* I - Name of service/device */
           const char   *regtype,	/* I - Type of service */
           const char   *replyDomain)	/* I - Service domain */
{
  cups_device_t	key,			/* Search key */
		*device;		/* Device */
  char		fullName[kDNSServiceMaxDomainName];
					/* Full name for query */


 /*
  * See if this is a new device...
  */

  key.name = (char *)serviceName;
  key.type = device_type(regtype);

  for (device = cupsArrayFind(devices, &key);
       device;
       device = cupsArrayNext(devices))
    if (_cups_strcasecmp(device->name, key.name))
      break;
    else if (device->type == key.type)
    {
      if (!_cups_strcasecmp(device->domain, "local.") &&
          _cups_strcasecmp(device->domain, replyDomain))
      {
       /*
        * Update the .local listing to use the "global" domain name instead.
	* The backend will try local lookups first, then the global domain name.
	*/

        free(device->domain);
	device->domain = strdup(replyDomain);

#ifdef HAVE_DNSSD
	DNSServiceConstructFullName(fullName, device->name, regtype,
	                            replyDomain);
#else /* HAVE_AVAHI */
	avahi_service_name_join(fullName, kDNSServiceMaxDomainName,
				serviceName, regtype, replyDomain);
#endif /* HAVE_DNSSD */

	free(device->fullName);
	device->fullName = strdup(fullName);
      }

      return (device);
    }

 /*
  * Yes, add the device...
  */

  device           = calloc(sizeof(cups_device_t), 1);
  device->name     = strdup(serviceName);
  device->domain   = strdup(replyDomain);
  device->type     = key.type;
  device->priority = 50;

  cupsArrayAdd(devices, device);

 /*
  * Set the "full name" of this service, which is used for queries...
  */

#ifdef HAVE_DNSSD
  DNSServiceConstructFullName(fullName, serviceName, regtype, replyDomain);
#else /* HAVE_AVAHI */
  avahi_service_name_join(fullName, kDNSServiceMaxDomainName, serviceName, regtype, replyDomain);
#endif /* HAVE_DNSSD */

  device->fullName = strdup(fullName);

  return (device);
}

//.........这里部分代码省略.........
  }

  httpGetHostname(http, http_hostname, sizeof(http_hostname));

  if (!_cups_strcasecmp(http_hostname, hostname) &&
      port == _httpAddrPort(http->hostaddr))
  {
   /*
    * Use the same connection...
    */

    http2 = http;
  }
  else
  {
   /*
    * Connect to the alternate host...
    */

    if (!strcmp(scheme, "https"))
      encryption = HTTP_ENCRYPT_ALWAYS;
    else
      encryption = HTTP_ENCRYPT_IF_REQUESTED;

    if ((http2 = httpConnectEncrypt(hostname, port, encryption)) == NULL)
    {
      DEBUG_printf(("4cups_create_localizations: Unable to connect to "
                    "%s:%d: %s", hostname, port, cupsLastErrorString()));
      return;
    }
  }

 /*
  * Get a temporary file...
  */

  if ((temp = cupsTempFile2(tempfile, sizeof(tempfile))) == NULL)
  {
    DEBUG_printf(("4cups_create_localizations: Unable to create temporary "
                  "file: %s", cupsLastErrorString()));
    if (http2 != http)
      httpClose(http2);
    return;
  }

  status = cupsGetFd(http2, resource, cupsFileNumber(temp));

  DEBUG_printf(("4cups_create_localizations: GET %s = %s", resource,
                httpStatus(status)));

  if (status == HTTP_OK)
  {
   /*
    * Got the file, read it...
    */

    char		buffer[8192],	/* Message buffer */
    			*id,		/* ID string */
    			*str;		/* Translated message */
    _cups_message_t	*m;		/* Current message */

    lseek(cupsFileNumber(temp), 0, SEEK_SET);

    while (cups_read_strings(temp, buffer, sizeof(buffer), &id, &str))
    {
      if ((m = malloc(sizeof(_cups_message_t))) == NULL)
        break;

      m->id  = strdup(id);
      m->str = strdup(str);

      if (m->id && m->str)
        cupsArrayAdd(dinfo->localizations, m);
      else
      {
        if (m->id)
          free(m->id);

        if (m->str)
          free(m->str);

        free(m);
        break;
      }
    }
  }

  DEBUG_printf(("4cups_create_localizations: %d messages loaded.",
                cupsArrayCount(dinfo->localizations)));

 /*
  * Cleanup...
  */

  unlink(tempfile);
  cupsFileClose(temp);

  if (http2 != http)
    httpClose(http2);
}

//.........这里部分代码省略.........

          if (!anchor)
	  {
	   /*
	    * Get section...
	    */

            if (*ptr != '\"')
	      break;

            ptr ++;
	    sectptr = ptr;

            while (*ptr && *ptr != '\"')
	      ptr ++;

            if (*ptr != '\"')
	      break;

            *ptr++ = '\0';

            strlcpy(section, sectptr, sizeof(section));

	    while (isspace(*ptr & 255))
              ptr ++;
          }

          if (*ptr != '\"')
	    break;

          ptr ++;
	  text = ptr;

          while (*ptr && *ptr != '\"')
	    ptr ++;

          if (*ptr != '\"')
	    break;

          *ptr++ = '\0';

	  if ((node = help_new_node(filename, anchor, section, text,
				    mtime, offset, length)) == NULL)
            break;

	  node->score = -1;

	  cupsArrayAdd(hi->nodes, node);
        }
      }
    }

    cupsFileClose(fp);
  }

 /*
  * Scan for new/updated files...
  */

  update = help_load_directory(hi, directory, NULL);

 /*
  * Remove any files that are no longer installed...
  */

  for (node = (help_node_t *)cupsArrayFirst(hi->nodes);
       node;
       node = (help_node_t *)cupsArrayNext(hi->nodes))
    if (node->score < 0)
    {
     /*
      * Delete this node...
      */

      cupsArrayRemove(hi->nodes, node);
      help_delete_node(node);
    }

 /*
  * Add nodes to the sorted array...
  */

  for (node = (help_node_t *)cupsArrayFirst(hi->nodes);
       node;
       node = (help_node_t *)cupsArrayNext(hi->nodes))
    cupsArrayAdd(hi->sorted, node);

 /*
  * Save the index if we updated it...
  */

  if (update)
    helpSaveIndex(hi, hifile);

 /*
  * Return the index...
  */

  return (hi);
}

int					/* O - Exit status */
main(int  argc,				/* I - Number of command-line arguments */
     char *argv[])			/* I - Command-line arguments */
{
  int		i;			/* Looping var */
  cups_array_t	*array,			/* Test array */
		*dup_array;		/* Duplicate array */
  int		status;			/* Exit status */
  char		*text;			/* Text from array */
  char		word[256];		/* Word from file */
  double	start,			/* Start time */
		end;			/* End time */
  cups_dir_t	*dir;			/* Current directory */
  cups_dentry_t	*dent;			/* Directory entry */
  char		*saved[32];		/* Saved entries */
  void		*data;			/* User data for arrays */


 /*
  * No errors so far...
  */

  status = 0;

 /*
  * cupsArrayNew()
  */

  fputs("cupsArrayNew: ", stdout);

  data  = (void *)"testarray";
  array = cupsArrayNew((cups_array_func_t)strcmp, data);

  if (array)
    puts("PASS");
  else
  {
    puts("FAIL (returned NULL, expected pointer)");
    status ++;
  }

 /*
  * cupsArrayUserData()
  */

  fputs("cupsArrayUserData: ", stdout);
  if (cupsArrayUserData(array) == data)
    puts("PASS");
  else
  {
    printf("FAIL (returned %p instead of %p!)\n", cupsArrayUserData(array),
           data);
    status ++;
  }

 /*
  * cupsArrayAdd()
  */

  fputs("cupsArrayAdd: ", stdout);

  if (!cupsArrayAdd(array, strdup("One Fish")))
  {
    puts("FAIL (\"One Fish\")");
    status ++;
  }
  else
  {
    if (!cupsArrayAdd(array, strdup("Two Fish")))
    {
      puts("FAIL (\"Two Fish\")");
      status ++;
    }
    else
    {
      if (!cupsArrayAdd(array, strdup("Red Fish")))
      {
	puts("FAIL (\"Red Fish\")");
	status ++;
      }
      else
      {
        if (!cupsArrayAdd(array, strdup("Blue Fish")))
	{
	  puts("FAIL (\"Blue Fish\")");
	  status ++;
	}
	else
	  puts("PASS");
      }
    }
  }

 /*
  * cupsArrayCount()
  */

  fputs("cupsArrayCount: ", stdout);
  if (cupsArrayCount(array) == 4)
    puts("PASS");
//.........这里部分代码省略.........

//.........这里部分代码省略.........
		    cupsArrayCount(Subscriptions));
    return (NULL);
  }

  if (MaxSubscriptionsPerJob > 0 && job)
  {
    int	count;				/* Number of job subscriptions */

    for (temp = (cupsd_subscription_t *)cupsArrayFirst(Subscriptions),
             count = 0;
         temp;
	 temp = (cupsd_subscription_t *)cupsArrayNext(Subscriptions))
      if (temp->job == job)
        count ++;

    if (count >= MaxSubscriptionsPerJob)
    {
      cupsdLogMessage(CUPSD_LOG_DEBUG,
		      "cupsdAddSubscription: Reached MaxSubscriptionsPerJob %d "
		      "for job #%d (count=%d)", MaxSubscriptionsPerJob,
		      job->id, count);
      return (NULL);
    }
  }

  if (MaxSubscriptionsPerPrinter > 0 && dest)
  {
    int	count;				/* Number of printer subscriptions */

    for (temp = (cupsd_subscription_t *)cupsArrayFirst(Subscriptions),
             count = 0;
         temp;
	 temp = (cupsd_subscription_t *)cupsArrayNext(Subscriptions))
      if (temp->dest == dest)
        count ++;

    if (count >= MaxSubscriptionsPerPrinter)
    {
      cupsdLogMessage(CUPSD_LOG_DEBUG,
		      "cupsdAddSubscription: Reached "
		      "MaxSubscriptionsPerPrinter %d for %s (count=%d)",
		      MaxSubscriptionsPerPrinter, dest->name, count);
      return (NULL);
    }
  }

 /*
  * Allocate memory for this subscription...
  */

  if ((temp = calloc(1, sizeof(cupsd_subscription_t))) == NULL)
  {
    cupsdLogMessage(CUPSD_LOG_CRIT,
                    "Unable to allocate memory for subscription object - %s",
                    strerror(errno));
    return (NULL);
  }

 /*
  * Fill in common data...
  */

  if (sub_id)
  {
    temp->id = sub_id;

    if (sub_id >= NextSubscriptionId)
      NextSubscriptionId = sub_id + 1;
  }
  else
  {
    temp->id = NextSubscriptionId;

    NextSubscriptionId ++;
  }

  temp->mask           = mask;
  temp->dest           = dest;
  temp->job            = job;
  temp->pipe           = -1;
  temp->first_event_id = 1;
  temp->next_event_id  = 1;

  cupsdSetString(&(temp->recipient), uri);

 /*
  * Add the subscription to the array...
  */

  cupsArrayAdd(Subscriptions, temp);

 /*
  * For RSS subscriptions, run the notifier immediately...
  */

  if (uri && !strncmp(uri, "rss:", 4))
    cupsd_start_notifier(temp);

  return (temp);
}

static void
cupsd_send_notification(
    cupsd_subscription_t *sub,		/* I - Subscription object */
    cupsd_event_t        *event)	/* I - Event to send */
{
  ipp_state_t	state;			/* IPP event state */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsd_send_notification(sub=%p(%d), event=%p(%s))",
                  sub, sub->id, event, cupsdEventName(event->event));

 /*
  * Allocate the events array as needed...
  */

  if (!sub->events)
  {
    sub->events = cupsArrayNew3((cups_array_func_t)NULL, NULL,
                                (cups_ahash_func_t)NULL, 0,
				(cups_acopy_func_t)NULL,
				(cups_afree_func_t)cupsd_delete_event);

    if (!sub->events)
    {
      cupsdLogMessage(CUPSD_LOG_CRIT,
                      "Unable to allocate memory for subscription #%d!",
                      sub->id);
      return;
    }
  }

 /*
  * Purge an old event as needed...
  */

  if (cupsArrayCount(sub->events) >= MaxEvents)
  {
   /*
    * Purge the oldest event in the cache...
    */

    cupsArrayRemove(sub->events, cupsArrayFirst(sub->events));

    sub->first_event_id ++;
  }

 /*
  * Add the event to the subscription.  Since the events array is
  * always MaxEvents in length, and since we will have already
  * removed an event from the subscription cache if we hit the
  * event cache limit, we don't need to check for overflow here...
  */

  cupsArrayAdd(sub->events, event);

 /*
  * Deliver the event...
  */

  if (sub->recipient)
  {
    for (;;)
    {
      if (sub->pipe < 0)
	cupsd_start_notifier(sub);

      cupsdLogMessage(CUPSD_LOG_DEBUG2, "sub->pipe=%d", sub->pipe);

      if (sub->pipe < 0)
	break;

      event->attrs->state = IPP_IDLE;

      while ((state = ippWriteFile(sub->pipe, event->attrs)) != IPP_DATA)
        if (state == IPP_ERROR)
	  break;

      if (state == IPP_ERROR)
      {
        if (errno == EPIPE)
	{
	 /*
	  * Notifier died, try restarting it...
	  */

          cupsdLogMessage(CUPSD_LOG_WARN,
	                  "Notifier for subscription %d (%s) went away, "
			  "retrying!",
			  sub->id, sub->recipient);
	  cupsdEndProcess(sub->pid, 0);

	  close(sub->pipe);
	  sub->pipe = -1;
          continue;
	}

        cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Unable to send event for subscription %d (%s)!",
			sub->id, sub->recipient);
//.........这里部分代码省略.........