inc/gcal.h

   1 /*
   2   Copyright (c) 2008 Instituto Nokia de Tecnologia
   3   All rights reserved.
   4
   5   Redistribution and use in source and binary forms, with or without modification,
   6   are permitted provided that the following conditions are met:
   7
   8   * Redistributions of source code must retain the above copyright notice,
   9   this list of conditions and the following disclaimer.
  10   * Redistributions in binary form must reproduce the above copyright notice,
  11   this list of conditions and the following disclaimer in the documentation
  12   and/or other materials provided with the distribution.
  13   * Neither the name of the INdT nor the names of its contributors
  14   may be used to endorse or promote products derived from this software
  15   without specific prior written permission.
  16
  17   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  21   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27   POSSIBILITY OF SUCH DAMAGE.
  28 */
  29 /**
  30  * @file   gcal.h
  31  * @author Adenilson Cavalcanti da Silva <adenilson.silva@indt.org.br>
  32  * @date   Mon Mar  3 20:15:09 2008
  33  *
  34  * @brief  libgcal header file.
  35  *
  36  * This defines the public functions.
  37  *
  38  */
  39 #ifndef __GCAL_LIB__
  40 #define __GCAL_LIB__
  41
  42 /* For size_t */
  43 #include <stdlib.h>
  44
  45 /** Set gcal Google service mode */
  46 typedef enum { GCALENDAR, GCONTACT } gservice;
  47
  48 /** Flag to control if deleted entries will be retrieved or not
  49  * (for while, google only implements that for 'contacts').
  50  * Calendar deleted entries will *always* be returned with
  51  * 'eventStatus' set to 'cancelled'.
  52  *
  53  */
  54 typedef enum { HIDE, SHOW } display_deleted_entries;
  55
  56 /** Upload (being POST or PUT) definition option.
  57  *
  58  * Its used to set behavior in \ref up_entry function.
  59  */
  60 typedef enum {
  61         /** Code for HTTP POST. */
  62         POST,
  63         /** Code for HTTP PUT */
  64         PUT } HTTP_CMD;
  65
  66 /** Really weird timestamp from RFC 3339 is
  67  * 1937-01-01T12:00:27.87+00:20
  68  * so 30 bytes is enough to have milisecond precision
  69  * in worst case.
  70  */
  71 static const size_t TIMESTAMP_MAX_SIZE = 30;
  72
  73 /** Minimal timestamp size is
  74  * 1937-01-01T12:00:27.87Z
  75  */
  76 static const size_t TIMESTAMP_SIZE = 23;
  77
  78
  79 /** Library structure. It holds resources (curl, buffer, etc).
  80  */
  81 struct gcal_resource;
  82
  83 /** Library structure, represents each calendar event entry.
  84  */
  85 struct gcal_event;
  86
  87 /** Library structure, represents common data for a google entry (being
  88  * calendar or contact). It has: id, updated, title, edit_uri.
  89  */
  90 struct gcal_entry;
  91
  92 /** An opaque type for gcal object.
  93  */
  94 typedef struct gcal_resource * gcal_t;
  95
  96
  97 /** Library structure destructor (use it free its internal resources properly).
  98  */
  99 void gcal_destroy(struct gcal_resource *gcal_obj);
 100
 101 /** Internal use function, cleans up the internal buffer.
 102  *
 103  * \todo move it to a distinct internal module.
 104  *
 105  * @param gcal_obj Library resource structure pointer.
 106  */
 107 void clean_buffer(struct gcal_resource *gcal_obj);
 108
 109
 110 /** Library structure constructor, the user can only have pointers to the
 111  * library \ref gcal_resource structure.
 112  *
 113  * Concerning google service type, it defaults to google calendar. You can
 114  * change it using \ref gcal_set_service.
 115  *
 116  * @param mode Service that libgcal will handle (for while, GCALENDAR
 117  * and GCONTACT).
 118  *
 119  * @return A pointer to a newly created object or NULL.
 120  */
 121 struct gcal_resource *gcal_construct(gservice mode);
 122
 123 /** Sets the google service that user wants to authenticate.
 124  *
 125  * For while, only calendar (cl) and contacts (cp) are supported.
 126  *
 127  * @param gcalobj Pointer to a library resource structure \ref gcal_resource.
 128  *
 129  * @param mode Service type, see \ref gservice.
 130  *
 131  * @return 0 for success, -1 otherwise.
 132  */
 133 int gcal_set_service(struct gcal_resource *gcalobj, gservice mode);
 134
 135
 136 /** Gets from google an authentication token, using the 'ClientLogin' service.
 137  *
 138  * Use it before getting/setting google calendar events. If you are behind of
 139  * a network proxy, its import to use \ref gcal_set_proxy *before* to set
 140  * the proxy (or all network connections will hang and timeout).
 141  *
 142  * @param gcalobj Pointer to a library resource structure \ref gcal_resource
 143  *
 144  * @param user The user google login account.
 145  *
 146  * @param password User password in plain text
 147  *                 \todo think in a way to encrypt password
 148  *
 149  * @return Returns 0 on success, -1 otherwise.
 150  */
 151 int gcal_get_authentication(struct gcal_resource *gcalobj,
 152                             char *user, char *password);
 153
 154
 155 /** Dumps events from default calendar to internal buffer.
 156  * \todo Let the library user select which calendar he/she wants
 157  * to get the events. See \ref gcal_calendar_list.
 158  *
 159  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 160  *                 previously got the authentication using
 161  *                 \ref gcal_get_authentication.
 162  *
 163  * @param gdata_version Version of Data API.
 164  *
 165  * @return Returns 0 on success, -1 otherwise.
 166  */
 167 int gcal_dump(struct gcal_resource *gcalobj, const char *gdata_version);
 168
 169 /** Get a list of users calendars (gcalendar supports multiple calendars
 170  * besides the default calendar).
 171  *
 172  * I think it would be a good idea to let the library user decide which
 173  * calendar to get the events. See too \ref gcal_dump.
 174  *
 175  * \todo Parse the Atom feed and provide easy access to the calendar lists.
 176  *
 177  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 178  *                 previously got the authentication using
 179  *                 \ref gcal_get_authentication.
 180  *
 181  * @return Returns 0 on success, -1 otherwise.
 182  */
 183 int gcal_calendar_list(struct gcal_resource *gcalobj);
 184
 185
 186 /** Return the number of event entries a calendar has (you should
 187  * had got the atom stream before, using \ref gcal_dump).
 188  *
 189  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 190  *                 previously got the authentication using
 191  *                 \ref gcal_get_authentication.
 192  *
 193  * @return -1 on error, any number >= 0 otherwise.
 194  */
 195 int gcal_entry_number(struct gcal_resource *gcalobj);
 196
 197
 198 /** Extracts from the atom stream the calendar event entries (you should
 199  * had got the atom stream before, using \ref gcal_dump).
 200  *
 201  * Pay attention that it returns a vector of structures that must be destroyed
 202  * using \ref gcal_destroy_entries.
 203  *
 204  * Since atom XML feeds can get huge, as soon the function creates entries
 205  * vector and copies the data from the internal \ref gcal_resource buffer,
 206  * it will free its internal buffer to save memory.
 207  *
 208  *
 209  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 210  *                 previously got the authentication using
 211  *                 \ref gcal_get_authentication.
 212  *
 213  * @param length Pointer to an unsigned int, it will have the vector length.
 214  *
 215  * @return A pointer on sucess, NULL otherwise.
 216  */
 217 struct gcal_event *gcal_get_entries(struct gcal_resource *gcalobj,
 218                                     size_t *length);
 219
 220
 221 /** Always use this to set calendar event structure to a sane state.
 222  *
 223  * You were warned...
 224  *
 225  * @param entry A pointer to a \ref gcal_event.
 226  */
 227 void gcal_init_event(struct gcal_event *entry);
 228
 229
 230 /** Cleanup memory of 1 entry structure pointer.
 231  *
 232  *
 233  * @param entry A pointer to a \ref gcal_event.
 234  */
 235 void gcal_destroy_entry(struct gcal_event *entry);
 236
 237
 238 /** Generic HTTP GET function.
 239  *
 240  * Used when getting entries in a feed (or other data that requires
 241  * an authenticated GET).
 242  *
 243  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 244  *                 previously got the authentication using
 245  *                 \ref gcal_get_authentication.
 246  *
 247  * @param url URL string.
 248  *
 249  * @param cb_download Callback used for writing downloaded data. Must
 250  * be of type: size_t()(void *, size_t, size_t, void*)
 251  *
 252  * @param gdata_version Version of Data API.
 253  *
 254  * @return 0 for success, -1 for error.
 255  */
 256 int get_follow_redirection(struct gcal_resource *gcalobj, const char *url,
 257                            void *cb_download, const char *gdata_version);
 258
 259
 260 /** Cleanup the memory of a vector of calendar entries created using
 261  * \ref gcal_get_entries.
 262  *
 263  * @param entries A pointer to a vector of \ref gcal_event structure.
 264  *
 265  * @param length The vector length.
 266  */
 267 void gcal_destroy_entries(struct gcal_event *entries, size_t length);
 268
 269 /** Posts data to a server URL and checks its result.
 270  *
 271  * I'm not sure if this one should be here, since it is a more an internal
 272  * function (but I need to share it with 'contacts' too).
 273  *
 274  * \todo move it to a distinct internal module.
 275  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 276  *                 previously got the authentication using
 277  *                 \ref gcal_get_authentication.
 278  *
 279  * @param url The server URL.
 280  * @param header First header part.
 281  * @param header2 Second header part (can be NULL).
 282  * @param header3 Third header part (can be NULL).
 283  * @param header4 Third header part (can be NULL). Used for ETag (Google Data
 284  * API 2.0)
 285  * @param post_data The data to post (can be NULL).
 286  * @param length The data length (can be zero).
 287  * @param expected_answer The expected answer code, see GCAL_DEFAULT_ANSWER and
 288  * friends.
 289  *
 290  * @return -1 on error, 0 on success.
 291  */
 292 int http_post(struct gcal_resource *gcalobj, const char *url,
 293               char *header, char *header2, char *header3,
 294               char *header4,
 295               char *post_data, unsigned int length,
 296               const int expected_answer,
 297               const char *gdata_version);
 298
 299
 300 /** Uploads an entry (calendar or contact) to a server URL
 301  *
 302  * Used by \ref gcal_create_event, \ref gcal_create_contact,
 303  * \ref gcal_edit_event.
 304  *
 305  *
 306  * @param data2post A pointer to string, it will be the body to be posted.
 307  *
 308  * @param length The data length (can be zero).
 309  *
 310  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 311  *                 previously got the authentication using
 312  *                 \ref gcal_get_authentication.
 313  *
 314  * @param url_server The URL of server (one for calendar and other for
 315  * contacts).
 316  *
 317  * @param etag Google Data API 2.0 requires an Etag in HTTP header for some
 318  * operations.
 319  *
 320  * @param up_mode If the upload of data will be using PUT or POST (internally
 321  * it uses 'http_put' and \ref 'http_post').
 322  *
 323  * @param content_type The content type, to use default (application/atom+xml)
 324  * pass NULL.
 325  *
 326  * @param expected_code The expected return code from server (200, 201, etc.)
 327  * See GCAL_DEFAULT_ANSWER and friends.
 328  *
 329  * @return -1 on error, 0 on success.
 330  */
 331 int up_entry(char *data2post, unsigned int m_length,
 332              struct gcal_resource *gcalobj,
 333              const char *url_server, char *etag,
 334              HTTP_CMD up_mode, char *content_type,
 335              int expected_code);
 336
 337
 338 /** Creates an new calendar event.
 339  *
 340  * You need to first succeed to get an authorization token using
 341  * \ref gcal_get_authentication.
 342  *
 343  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 344  *                 previously got the authentication using
 345  *                 \ref gcal_get_authentication.
 346  *
 347  * @param entries A pointer to an calendar entry event (see \ref gcal_event).
 348  *
 349  * @param updated Pass a pointer to a \ref gcal_event structure if you
 350  * wish to access the newly created contact (i.e. access fields like
 351  * edit_uri and id). If you don't need it, just pass NULL.
 352  *
 353  * @return -1 on error, 0 on success, -2 if operation went correctly but
 354  * cannot return 'updated' entry.
 355  */
 356 int gcal_create_event(struct gcal_resource *gcalobj,
 357                       struct gcal_event *entries,
 358                       struct gcal_event *updated);
 359
 360 /** Deletes a calendar event.
 361  *
 362  * You need to first succeed to get an authorization token using
 363  * \ref gcal_get_authentication.
 364  *
 365  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 366  *                 previously got the authentication using
 367  *                 \ref gcal_get_authentication.
 368  *
 369  * @param entry A pointer to one calendar entry event (see \ref gcal_event).
 370  *
 371  * @return -1 on error, 0 on success.
 372  */
 373 int gcal_delete_event(struct gcal_resource *gcalobj,
 374                       struct gcal_event *entry);
 375
 376
 377 /** Edits a calendar event.
 378  *
 379  * It requires the presence of field 'edit_uri' in entry pointer structure
 380  * (see \ref gcal_event).
 381  *
 382  *
 383  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 384  *                 previously got the authentication using
 385  *                 \ref gcal_get_authentication.
 386  *
 387  * @param entry A pointer to an calendar entry event.
 388  *
 389  * @param updated Pass a pointer to a \ref gcal_event structure if you
 390  * wish to access the newly created contact (i.e. access fields like
 391  * edit_uri and id). If you don't need it, just pass NULL.
 392  *
 393  * @return -1 on error, 0 on success, -2 if operation went correctly but
 394  * cannot return 'updated' entry.
 395  */
 396 int gcal_edit_event(struct gcal_resource *gcalobj,
 397                     struct gcal_event *entry,
 398                     struct gcal_event *updated);
 399
 400
 401
 402 /** Provides access to internal buffer (e.g. to access the raw Atom stream).
 403  *
 404  * Pay attention that you *must not* mess with its memory, since when deleting
 405  * the gcal_resource pointer with \ref gcal_destroy the memory pointed will
 406  * be freed.
 407  *
 408  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 409  *                 previously got the authentication using
 410  *                 \ref gcal_get_authentication.
 411  *
 412  * @return A pointer to internal gcal_resource buffer.
 413  */
 414 char *gcal_access_buffer(struct gcal_resource *gcalobj);
 415
 416 /** Function to get the current timestamp (RFC3339) with milisecond
 417  * precision.
 418  *
 419  * @param timestamp A pointer to a buffer to where to write the timestamp.
 420  *
 421  * @param length The buffer length.
 422  *
 423  * @param atimezone A timezone string in format: +/-hh:mm:ss. It will be
 424  * appended to the output timestamp.
 425  *
 426  * @return 0 for success, -1 for failure.
 427  */
 428 int get_mili_timestamp(char *timestamp, size_t length, char *atimezone);
 429
 430
 431 /** Returns all entries (being calendar or contacts) that are newer
 432  * than a timestamp.
 433  *
 434  * Use it to get updated entries.
 435  *
 436  * @param gcalobj  Pointer to a \ref gcal_resource structure, which has
 437  *                 previously got the authentication using
 438  *                 \ref gcal_get_authentication.
 439  *
 440  * @param timestamp A timestamp in RFC 3339 format yyyy-mm-ddThh:mm:ss
 441  *(if NULL, this function will use current day, with time set to 06:00AM).
 442  *
 443  * @param gdata_version Version of Data API.
 444  *
 445  * @return -1 on error, 0 on success.
 446  */
 447 int gcal_query_updated(struct gcal_resource *gcalobj, char *timestamp,
 448                 const char *gdata_version);
 449
 450 /** Set a timezone, following the RFC 3339 format +/-hh:mm.
 451  *
 452  * The structure copy the string with the timezone.
 453  *
 454  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 455  *                 previously got the authentication using
 456  *                 \ref gcal_get_authentication.
 457  *
 458  * @param atimezone A pointer to string with the timezone (e.g. for Helsinki
 459  * which is +2GMT it would be "+02:00").
 460  *
 461  * @return -1 on error, 0 on success.
 462  */
 463 int gcal_set_timezone(struct gcal_resource *gcalobj, char *atimezone);
 464
 465 /** Sets gcal XML store mode.
 466  *
 467  * Use it if you wish to store the RAW google XML entry data inside
 468  * each entry object.
 469  *
 470  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 471  *                 previously got the authentication using
 472  *                 \ref gcal_get_authentication.
 473  *
 474  * @param flag 0 for not store, 1 to activate store mode.
 475  */
 476 void gcal_set_store_xml(struct gcal_resource *gcalobj, char flag);
 477
 478 /** Sets network proxy.
 479  *
 480  * Use it if you are behind a network proxy and can't directly access
 481  * the google server.
 482  *
 483  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 484  *                 previously got the authentication using
 485  *                 \ref gcal_get_authentication.
 486  *
 487  * @param proxy A null terminated string, must have the hostname (or IP)
 488  * and can have the user+password too (e.g. "user+password@10.10.1.1:8080" or
 489  * simply "http://hostname:port". Remark: I only tested it with
 490  * a proxy that doesn't require authentication.
 491  *
 492  */
 493 void gcal_set_proxy(struct gcal_resource *gcalobj, char *proxy);
 494
 495 /** Define the location that results should be returned for queries.
 496  *
 497  * Use it to set your current location, otherwise the configured city for
 498  * the user account is used.
 499  * The structure copy the string with the timezone.
 500  *
 501  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 502  *                 previously got the authentication using
 503  *                 \ref gcal_get_authentication.
 504  *
 505  * @param location A pointer to string with the location (e.g. "America/Manaus",
 506  * "Europe/Helsinki", "America/Los_Angeles'). It must not has empty spaces on
 507  * it.
 508  *
 509  * @return -1 on error, 0 on success.
 510  */
 511 int gcal_set_location(struct gcal_resource *gcalobj, char *location);
 512
 513 /** Use this to set if deleted entries should be returned or not. Pay attention
 514  * that this is implemented only for google contacts (google calendar entries
 515  * doesn't have this query parameter).
 516  *
 517  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 518  *                 previously got the authentication using
 519  *                 \ref gcal_get_authentication.
 520  *
 521  * @param opt Option parameter, enable (SHOW) or not (HIDE) retrieving of
 522  * deleted entries (see \ref display_deleted_entries).
 523  */
 524 void gcal_deleted(struct gcal_resource *gcalobj, display_deleted_entries opt);
 525
 526
 527 /** Generic query function, use it to do a query to google services.
 528  *
 529  * You can pass a query with multiple parameters, but in just one string.
 530  *
 531  * ATTENTION: querying by name will not work, since its not implemented in
 532  * google contacts. It will give HTTP 403 error.
 533  *
 534  * @param gcalobj Pointer to a \ref gcal_resource structure, which has
 535  *                 previously got the authentication using
 536  *                 \ref gcal_get_authentication.
 537  *
 538  * @param parameters A string with the query e.g. for calendar
 539  * gcal_query(gcal, "ctz=America/Los_Angeles&author=Joe");
 540  *
 541  * And for contacts:
 542  * gcal_query(gcal, "updated-min=2008-06-20T06:00:00Z&"
 543  *                  "alt=atom&max-results=500&showdeleted=true");
 544  *
 545  * @param gdata_version Version of Data API.
 546  *
 547  * @return -1 on error, 0 on success.
 548  */
 549 int gcal_query(struct gcal_resource *gcalobj, const char *parameters,
 550                 const char *gdata_version);
 551
 552
 553 /* Common fields between calendar and contacts are
 554  * of type 'gcal_entry'
 555  */
 556
 557 /** Access to entry ID.
 558  *
 559  * Each google entry (event/contact) has a unique ID, you can access
 560  * it using this function.
 561  *
 562  * @param entry A data entry pointer, see \ref gcal_entry.
 563  *
 564  * @return A pointer to internal field (*dont* try to free it!).
 565  */
 566 char *gcal_get_id(struct gcal_entry *entry);
 567
 568 /** Access to last updated timestamp of an entry.
 569  *
 570  * When an operation (being add/edit/delete) is done in an entry, the timestamp
 571  * of it is recorded). You can access it using this function.
 572  *
 573  * @param entry A data entry pointer, see \ref gcal_entry.
 574  *
 575  * @return A pointer to internal field (*dont* try to free it!).
 576  */
 577 char *gcal_get_updated(struct gcal_entry *entry);
 578
 579 /** Access entry title.
 580  *
 581  * Each entry has a title, being contacts (the contact name) or event
 582  * (meeting title).
 583  *
 584  * @param entry A data entry pointer, see \ref gcal_entry.
 585  *
 586  * @return A pointer to internal field (*dont* try to free it!).
 587  */
 588 char *gcal_get_title(struct gcal_entry *entry);
 589
 590 /** Access edit url.
 591  *
 592  * Each entry has an edit url (which is the combination of ID + cookie).
 593  * This edit url is required to do operations (edit/delete) and changes
 594  * each time an operation is done.
 595  *
 596  * @param entry A data entry pointer, see \ref gcal_entry.
 597  *
 598  * @return A pointer to internal field (*dont* try to free it!).
 599  */
 600 char *gcal_get_url(struct gcal_entry *entry);
 601
 602 /** Access ETag.
 603  *
 604  * Each entry has an ETag (Google Data API 2.0).
 605  * This etag is required to do operations (edit/delete) and changes
 606  * each time an operation is done.
 607  *
 608  * @param entry A data entry pointer, see \ref gcal_entry.
 609  *
 610  * @return A pointer to internal field (*dont* try to free it!).
 611  */
 612 char *gcal_get_etag(struct gcal_entry *entry);
 613
 614 /** Access raw XML.
 615  *
 616  * Even if some fields are parsed from atom stream and directly accessable
 617  * from entry objects, its possible to access the RAW representation of the
 618  * whole entry using this function.
 619  *
 620  * @param entry A data entry pointer, see \ref gcal_entry.
 621  *
 622  * @return A pointer to internal field (*dont* try to free it!).
 623  */
 624 char *gcal_get_xml(struct gcal_entry *entry);
 625
 626 /** Entry status (deleted: 1, not: 0).
 627  *
 628  * When an entry is deleted, there is a way to known it, being specific for
 629  * the entry type. Events have the gd:eventStatus equal to
 630  * "blah#event.cancelled".
 631  *
 632  * Contacts will have a new field (gd:deleted).
 633  *
 634  * @param entry A data entry pointer, see \ref gcal_entry.
 635  *
 636  * @return 1 for deleted, 0 for not deleted, -1 for error case (f the event
 637  * object is invalid).
 638  */
 639 char gcal_get_deleted(struct gcal_entry *entry);
 640
 641 #endif