/**************************************************************************** ** ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the documentation of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ** the names of its contributors may be used to endorse or promote ** products derived from this software without specific prior written ** permission. ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** $QT_END_LICENSE$ ** ****************************************************************************/ //! [0] QScriptEngine myEngine; QScriptValue three = myEngine.evaluate("1 + 2"); //! [0] //! [1] QScriptValue fun = myEngine.evaluate("(function(a, b) { return a + b; })"); QScriptValueList args; args << 1 << 2; QScriptValue threeAgain = fun.call(QScriptValue(), args); //! [1] //! [2] QString fileName = "helloworld.qs"; QFile scriptFile(fileName); if (!scriptFile.open(QIODevice::ReadOnly)) // handle error QTextStream stream(&scriptFile); QString contents = stream.readAll(); scriptFile.close(); myEngine.evaluate(contents, fileName); //! [2] //! [3] myEngine.globalObject().setProperty("myNumber", 123); ... QScriptValue myNumberPlusOne = myEngine.evaluate("myNumber + 1"); //! [3] //! [4] QScriptValue result = myEngine.evaluate(...); if (myEngine.hasUncaughtException()) { int line = myEngine.uncaughtExceptionLineNumber(); qDebug() << "uncaught exception at line" << line << ":" << result.toString(); } //! [4] //! [5] QPushButton button; QScriptValue scriptButton = myEngine.newQObject(&button); myEngine.globalObject().setProperty("button", scriptButton); myEngine.evaluate("button.checkable = true"); qDebug() << scriptButton.property("checkable").toBoolean(); scriptButton.property("show").call(); // call the show() slot //! [5] //! [6] QScriptValue myAdd(QScriptContext *context, QScriptEngine *engine) { QScriptValue a = context->argument(0); QScriptValue b = context->argument(1); return a.toNumber() + b.toNumber(); } //! [6] //! [7] QScriptValue fun = myEngine.newFunction(myAdd); myEngine.globalObject().setProperty("myAdd", fun); //! [7] //! [8] QScriptValue result = myEngine.evaluate("myAdd(myNumber, 1)"); //! [8] //! [9] QScriptValue Foo(QScriptContext *context, QScriptEngine *engine) { if (context->calledAsConstructor()) { // initialize the new object context->thisObject().setProperty("bar", ...); // ... // return a non-object value to indicate that the // thisObject() should be the result of the "new Foo()" expression return engine->undefinedValue(); } else { // not called as "new Foo()", just "Foo()" // create our own object and return that one QScriptValue object = engine->newObject(); object.setPrototype(context->callee().property("prototype")); object.setProperty("baz", ...); return object; } } ... QScriptValue fooProto = engine->newObject(); fooProto.setProperty("whatever", ...); engine->globalObject().setProperty("Foo", engine->newFunction(Foo, fooProto)); //! [9] //! [10] class Bar { ... }; Q_DECLARE_METATYPE(Bar) QScriptValue constructBar(QScriptContext *context, QScriptEngine *engine) { Bar bar; // initialize from arguments in context, if desired ... return engine->toScriptValue(bar); } class BarPrototype : public QObject, public QScriptable { // provide the scriptable interface of this type using slots and properties ... }; ... // create and register the Bar prototype and constructor in the engine BarPrototype *barPrototypeObject = new BarPrototype(...); QScriptValue barProto = engine->newQObject(barPrototypeObject); engine->setDefaultPrototype(qMetaTypeId, barProto); QScriptValue barCtor = engine->newFunction(constructBar, barProto); engine->globalObject().setProperty("Bar", barCtor); //! [10] //! [11] static QScriptValue getSetFoo(QScriptContext *context, QScriptEngine *engine) { QScriptValue callee = context->callee(); if (context->argumentCount() == 1) // writing? callee.setProperty("value", context->argument(0)); return callee.property("value"); } .... QScriptValue object = engine.newObject(); object.setProperty("foo", engine.newFunction(getSetFoo), QScriptValue::PropertyGetter | QScriptValue::PropertySetter); //! [11] //! [12] QScriptValue object = engine.newObject(); object.setProperty("foo", engine.newFunction(getFoo), QScriptValue::PropertyGetter); object.setProperty("foo", engine.newFunction(setFoo), QScriptValue::PropertySetter); //! [12] //! [13] Q_SCRIPT_DECLARE_QMETAOBJECT(QLineEdit, QWidget*) ... QScriptValue lineEditClass = engine.scriptValueFromQMetaObject(); engine.globalObject().setProperty("QLineEdit", lineEditClass); //! [13] //! [14] if (hello && world) print("hello world"); //! [14] //! [15] if (hello && //! [15] //! [16] 0 = 0 //! [16] //! [17] ./test.js //! [17] //! [18] foo["bar"] //! [18] //! [19] QScriptEngine engine; QScriptContext *context = engine.pushContext(); context->activationObject().setProperty("myArg", 123); engine.evaluate("var tmp = myArg + 42"); ... engine.popContext(); //! [19] //! [20] struct MyStruct { int x; int y; }; //! [20] //! [21] Q_DECLARE_METATYPE(MyStruct) //! [21] //! [22] QScriptValue toScriptValue(QScriptEngine *engine, const MyStruct &s) { QScriptValue obj = engine->newObject(); obj.setProperty("x", s.x); obj.setProperty("y", s.y); return obj; } void fromScriptValue(const QScriptValue &obj, MyStruct &s) { s.x = obj.property("x").toInt32(); s.y = obj.property("y").toInt32(); } //! [22] //! [23] qScriptRegisterMetaType(engine, toScriptValue, fromScriptValue); //! [23] //! [24] MyStruct s = qscriptvalue_cast(context->argument(0)); ... MyStruct s2; s2.x = s.x + 10; s2.y = s.y + 20; QScriptValue v = engine->toScriptValue(s2); //! [24] //! [25] QScriptValue createMyStruct(QScriptContext *, QScriptEngine *engine) { MyStruct s; s.x = 123; s.y = 456; return engine->toScriptValue(s); } ... QScriptValue ctor = engine.newFunction(createMyStruct); engine.globalObject().setProperty("MyStruct", ctor); //! [25] //! [26] Q_DECLARE_METATYPE(QVector) ... qScriptRegisterSequenceMetaType >(engine); ... QVector v = qscriptvalue_cast >(engine->evaluate("[5, 1, 3, 2]")); qSort(v.begin(), v.end()); QScriptValue a = engine->toScriptValue(v); qDebug() << a.toString(); // outputs "[1, 2, 3, 5]" //! [26] //! [27] QScriptValue mySpecialQObjectConstructor(QScriptContext *context, QScriptEngine *engine) { QObject *parent = context->argument(0).toQObject(); QObject *object = new QObject(parent); return engine->newQObject(object, QScriptEngine::ScriptOwnership); } ... QScriptValue ctor = engine.newFunction(mySpecialQObjectConstructor); QScriptValue metaObject = engine.newQMetaObject(&QObject::staticMetaObject, ctor); engine.globalObject().setProperty("QObject", metaObject); QScriptValue result = engine.evaluate("new QObject()"); //! [27] ref='#n3'>3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/****************/
/* Module Setup */
/****************/

#define H5F_PACKAGE		/*suppress error about including H5Fpkg	  */

/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC	H5F_init_super_interface


/***********/
/* Headers */
/***********/
#include "H5private.h"		/* Generic Functions                    */
#include "H5ACprivate.h"        /* Metadata cache                       */
#include "H5Eprivate.h"		/* Error handling                       */
#include "H5Fpkg.h"             /* File access                          */
#include "H5FDprivate.h"	/* File drivers                         */
#include "H5Iprivate.h"		/* IDs                                  */
#include "H5Pprivate.h"		/* Property lists                       */
#include "H5SMprivate.h"        /* Shared Object Header Messages        */


/****************/
/* Local Macros */
/****************/


/******************/
/* Local Typedefs */
/******************/


/********************/
/* Package Typedefs */
/********************/


/********************/
/* Local Prototypes */
/********************/
static herr_t H5F_super_ext_create(H5F_t *f, hid_t dxpl_id, H5O_loc_t *ext_ptr);


/*********************/
/* Package Variables */
/*********************/


/*****************************/
/* Library Private Variables */
/*****************************/

/* Declare a free list to manage the H5F_super_t struct */
H5FL_DEFINE(H5F_super_t);


/*******************/
/* Local Variables */
/*******************/


/*--------------------------------------------------------------------------
NAME
   H5F_init_super_interface -- Initialize interface-specific information
USAGE
    herr_t H5F_init_super_interface()

RETURNS
    Non-negative on success/Negative on failure
DESCRIPTION
    Initializes any interface-specific data or routines.  (Just calls
    H5F_init() currently).

--------------------------------------------------------------------------*/
static herr_t
H5F_init_super_interface(void)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_init_super_interface)

    FUNC_LEAVE_NOAPI(H5F_init())
} /* H5F_init_super_interface() */


/*-------------------------------------------------------------------------
 * Function:	H5F_locate_signature
 *
 * Purpose:	Finds the HDF5 superblock signature in a file.	The signature
 *		can appear at address 0, or any power of two beginning with
 *		512.
 *
 * Return:	Success:	The absolute format address of the signature.
 *
 *		Failure:	HADDR_UNDEF
 *
 * Programmer:	Robb Matzke
 *		Friday, November  7, 1997
 *
 *-------------------------------------------------------------------------
 */
haddr_t
H5F_locate_signature(H5FD_t *file, hid_t dxpl_id)
{
    haddr_t	    addr, eoa;
    uint8_t	    buf[H5F_SIGNATURE_LEN];
    unsigned	    n, maxpow;
    haddr_t         ret_value;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5F_locate_signature)

    /* Find the least N such that 2^N is larger than the file size */
    if(HADDR_UNDEF == (addr = H5FD_get_eof(file)) || HADDR_UNDEF == (eoa = H5FD_get_eoa(file, H5FD_MEM_SUPER)))
	HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to obtain EOF/EOA value")
    for(maxpow = 0; addr; maxpow++)
        addr >>= 1;
    maxpow = MAX(maxpow, 9);

    /*
     * Search for the file signature at format address zero followed by
     * powers of two larger than 9.
     */
    for(n = 8; n < maxpow; n++) {
	addr = (8 == n) ? 0 : (haddr_t)1 << n;
	if(H5FD_set_eoa(file, H5FD_MEM_SUPER, addr + H5F_SIGNATURE_LEN) < 0)
	    HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to set EOA value for file signature")
	if(H5FD_read(file, dxpl_id, H5FD_MEM_SUPER, addr, (size_t)H5F_SIGNATURE_LEN, buf) < 0)
	    HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to read file signature")
	if(!HDmemcmp(buf, H5F_SIGNATURE, (size_t)H5F_SIGNATURE_LEN))
            break;
    } /* end for */

    /*
     * If the signature was not found then reset the EOA value and return
     * failure.
     */
    if(n >= maxpow) {
	(void)H5FD_set_eoa(file, H5FD_MEM_SUPER, eoa); /* Ignore return value */
	HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to find a valid file signature")
    } /* end if */

    /* Set return value */
    ret_value = addr;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_locate_signature() */


/*-------------------------------------------------------------------------
 * Function:    H5F_super_ext_create
 *
 * Purpose:     Create the superblock extension
 *
 * Return:      Success:        non-negative on success
 *              Failure:        Negative
 *
 * Programmer:  Vailin Choi; Feb 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5F_super_ext_create(H5F_t *f, hid_t dxpl_id, H5O_loc_t *ext_ptr)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5F_super_ext_create)

    /* Sanity check */
    HDassert(f);
    HDassert(f->shared);
    HDassert(f->shared->sblock);
    HDassert(!H5F_addr_defined(f->shared->sblock->ext_addr));
    HDassert(ext_ptr);

    H5O_loc_reset(ext_ptr);
    if(H5O_create(f, dxpl_id, 0, H5P_GROUP_CREATE_DEFAULT, ext_ptr) < 0)
	HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "unable to create superblock extension")

    /* Record the address of the superblock extension */
    f->shared->sblock->ext_addr = ext_ptr->addr;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5F_super_ext_create() */


/*-------------------------------------------------------------------------
 * Function:    H5F_super_ext_open
 *
 * Purpose:     Open an existing superblock extension
 *
 * Return:      Success:        non-negative on success
 *              Failure:        Negative
 *
 * Programmer:  Vailin Choi; Feb 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_super_ext_open(H5F_t *f, haddr_t ext_addr, H5O_loc_t *ext_ptr)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5F_super_ext_open)

    /* Sanity check */
    HDassert(f);
    HDassert(H5F_addr_defined(ext_addr));
    HDassert(ext_ptr);

    /* Set up "fake" object location for superblock extension */
    H5O_loc_reset(ext_ptr);
    ext_ptr->file = f;
    ext_ptr->addr = ext_addr;

    /* Open the superblock extension object header */
    if(H5O_open(ext_ptr) < 0)
	HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open superblock extension")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5F_super_ext_open() */


/*-------------------------------------------------------------------------
 * Function:   H5F_super_ext_close
 *              
 * Purpose:    Close superblock extension
 *
 * Return:     Success:        non-negative on success
 *             Failure:        Negative
 *
 * Programmer:  Vailin Choi; Feb 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t 
H5F_super_ext_close(H5F_t *f, H5O_loc_t *ext_ptr)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5F_super_ext_close)

    /* Sanity check */
    HDassert(f);
    HDassert(ext_ptr);

    /* Twiddle the number of open objects to avoid closing the file. */
    f->nopen_objs++;
    if(H5O_close(ext_ptr) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_CANTCLOSEOBJ, FAIL, "unable to close superblock extension")
    f->nopen_objs--;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5F_super_ext_close() */


/*-------------------------------------------------------------------------
 * Function:    H5F_super_read
 *
 * Purpose:     Reads the superblock from the file or from the BUF. If
 *              ADDR is a valid address, then it reads it from the file.
 *              If not, then BUF must be non-NULL for it to read from the
 *              BUF.
 *
 * Return:      Success:        SUCCEED
 *              Failure:        FAIL
 *
 * Programmer:  Bill Wendling
 *              wendling@ncsa.uiuc.edu
 *              Sept 12, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_super_read(H5F_t *f, hid_t dxpl_id)
{
    H5F_super_t *       sblock = NULL;      /* superblock structure                         */
    unsigned            sblock_flags = H5AC__NO_FLAGS_SET;       /* flags used in superblock unprotect call      */
    H5AC_protect_t      rw;                 /* read/write permissions for file              */
    hbool_t             dirtied = FALSE;    /* Bool for sblock protect call                 */
    herr_t              ret_value = SUCCEED; /* return value                                */

    FUNC_ENTER_NOAPI(H5F_super_read, FAIL)

    /* Find the superblock */
    if(HADDR_UNDEF == (f->shared->super_addr = H5F_locate_signature(f->shared->lf, dxpl_id)))
        HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "unable to find file signature")

    /* Determine file intent for superblock protect */
    if(H5F_INTENT(f) & H5F_ACC_RDWR)
        rw = H5AC_WRITE;
    else
        rw = H5AC_READ;

    /* Look up the superblock */
    if(NULL == (sblock = (H5F_super_t *)H5AC_protect(f, dxpl_id, H5AC_SUPERBLOCK, f->shared->super_addr, NULL, &dirtied, rw)))
        HGOTO_ERROR(H5E_CACHE, H5E_CANTPROTECT, FAIL, "unable to load superblock")
    
    /* Mark the superblock dirty if it was modified during loading or VFD indicated to do so */
    if((H5AC_WRITE == rw) && (dirtied || H5F_HAS_FEATURE(f, H5FD_FEAT_DIRTY_SBLK_LOAD)))
        sblock_flags |= H5AC__DIRTIED_FLAG;

    /* Pin the superblock in the cache */
    if(H5AC_pin_protected_entry(f, sblock) < 0)
        HGOTO_ERROR(H5E_FSPACE, H5E_CANTPIN, FAIL, "unable to pin superblock")

    /* Set the pointer to the pinned superblock */
    f->shared->sblock = sblock;

done:
    /* Release the superblock */
    if(sblock && H5AC_unprotect(f, dxpl_id, H5AC_SUPERBLOCK, f->shared->super_addr, sblock, sblock_flags) < 0)
        HDONE_ERROR(H5E_CACHE, H5E_CANTUNPROTECT, FAIL, "unable to close superblock")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_super_read() */


/*-------------------------------------------------------------------------
 * Function:    H5F_super_init
 *
 * Purpose:     Allocates the superblock for the file and initializes
 *              information about the superblock in memory.  Writes extension
 *              messages if any are needed.
 *
 * Return:      Success:        SUCCEED
 *              Failure:        FAIL
 *
 * Programmer:  Quincey Koziol
 *              koziol@ncsa.uiuc.edu
 *              Sept 15, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_super_init(H5F_t *f, hid_t dxpl_id)
{
    H5F_super_t    *sblock = NULL;      /* Superblock cache structure                 */
    hbool_t         sblock_in_cache = FALSE;    /* Whether the superblock has been inserted into the metadata cache */
    H5P_genplist_t *plist;              /* File creation property list                */
    hsize_t         userblock_size;     /* Size of userblock, in bytes                */
    hsize_t         superblock_size;    /* Size of superblock, in bytes               */
    size_t          driver_size;        /* Size of driver info block (bytes)          */
    unsigned super_vers = HDF5_SUPERBLOCK_VERSION_DEF; /* Superblock version for file */
    haddr_t         super_addr;         /* Address of superblock                      */
    hbool_t         need_ext;           /* Whether the superblock extension is needed */
    herr_t          ret_value = SUCCEED; /* Return Value                              */

    FUNC_ENTER_NOAPI(H5F_super_init, FAIL)

    /* Allocate space for the superblock */
    if(NULL == (sblock = H5FL_CALLOC(H5F_super_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")

    /* Initialize various address information */
    sblock->base_addr = HADDR_UNDEF;
    sblock->ext_addr = HADDR_UNDEF;
    sblock->driver_addr = HADDR_UNDEF;
    sblock->root_addr = HADDR_UNDEF;

    /* Get the shared file creation property list */
    if(NULL == (plist = (H5P_genplist_t *)H5I_object(f->shared->fcpl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")

    /* Initialize sym_leaf_k */
    if(H5P_get(plist, H5F_CRT_SYM_LEAF_NAME, &sblock->sym_leaf_k) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get byte number for object size")

    /* Initialize btree_k */
    if(H5P_get(plist, H5F_CRT_BTREE_RANK_NAME, &sblock->btree_k[0]) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get rank for btree internal nodes")

    /* Bump superblock version if we are to use the latest version of the format */
    if(f->shared->latest_format)
        super_vers = HDF5_SUPERBLOCK_VERSION_LATEST;
    /* Bump superblock version to create superblock extension for SOHM info */
    else if(f->shared->sohm_nindexes > 0)
        super_vers = HDF5_SUPERBLOCK_VERSION_2;
    /* Check for non-default indexed storage B-tree internal 'K' value
     * and set the version # of the superblock to 1 if it is a non-default
     * value.
     */
    else if(sblock->btree_k[H5B_CHUNK_ID] != HDF5_BTREE_CHUNK_IK_DEF)
        super_vers = HDF5_SUPERBLOCK_VERSION_1;

    /* If a newer superblock version is required, set it here */
    if(super_vers != HDF5_SUPERBLOCK_VERSION_DEF) {
        H5P_genplist_t *c_plist;              /* Property list */

        if(NULL == (c_plist = (H5P_genplist_t *)H5I_object(f->shared->fcpl_id)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not property list")
        if(H5P_set(c_plist, H5F_CRT_SUPER_VERS_NAME, &super_vers) < 0)
            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set superblock version")
    } /* end if */

    /*
     * The superblock starts immediately after the user-defined
     * header, which we have already insured is a proper size. The
     * base address is set to the same thing as the superblock for
     * now.
     */
    if(H5P_get(plist, H5F_CRT_USER_BLOCK_NAME, &userblock_size) < 0)
        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to get userblock size")

    sblock->base_addr = userblock_size;
    sblock->status_flags = 0;

    /* Reserve space for the userblock */
    if(H5FD_set_eoa(f->shared->lf, H5FD_MEM_SUPER, userblock_size) < 0)
        HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to set EOA value for userblock")

    /* Set the base address for the file in the VFD now, after allocating
     *  space for userblock.
     */
    if(H5FD_set_base_addr(f->shared->lf, sblock->base_addr) < 0)
        HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "failed to set base address for file driver")

    /* Save a local copy of the superblock version number */
    sblock->super_vers = super_vers;

    /* Compute the size of the superblock */
    superblock_size = H5F_SUPERBLOCK_SIZE(super_vers, f);

    /* Compute the size of the driver information block */
    H5_ASSIGN_OVERFLOW(driver_size, H5FD_sb_size(f->shared->lf), hsize_t, size_t);
    if(driver_size > 0) {
        driver_size += H5F_DRVINFOBLOCK_HDR_SIZE;

        /*
         * The file driver information block begins immediately after the
         * superblock. (relative to base address in file)
         */
        sblock->driver_addr = superblock_size;
    } /* end if */

    /*
     * Allocate space for the userblock, superblock & driver info blocks.
     * We do it with one allocation request because the userblock and
     * superblock need to be at the beginning of the file and only the first
     * allocation request is required to return memory at format address zero.
     */
    if(super_vers < HDF5_SUPERBLOCK_VERSION_2)
        superblock_size += driver_size;

    /* Reserve space in the file for the superblock, instead of allocating it */
    if(H5FD_set_eoa(f->shared->lf, H5FD_MEM_SUPER, superblock_size) < 0)
        HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to set EOA value for superblock")

    /* Set the superblock's address, it must be immediately after any userblock */
    super_addr = (haddr_t)0;

    /* Insert superblock into cache, pinned */
    if(H5AC_set(f, dxpl_id, H5AC_SUPERBLOCK, super_addr, sblock, H5AC__PIN_ENTRY_FLAG) < 0)
        HGOTO_ERROR(H5E_CACHE, H5E_CANTINS, FAIL, "can't add superblock to cache")
    sblock_in_cache = TRUE;

    /* Keep a copy of the superblock info */
    f->shared->sblock = sblock;
    f->shared->super_addr = super_addr;

    /*
     * Determine if we will need a superblock extension
     */

    /* Files with SOHM indices always need the superblock extension */
    if(f->shared->sohm_nindexes > 0) {
        HDassert(super_vers >= HDF5_SUPERBLOCK_VERSION_2);
        need_ext = TRUE;
    } /* end if */
    /* If we're going to use a version of the superblock format which allows
     *  for the superblock extension, check for non-default values to store
     *  in it.
     */
    else if(super_vers >= HDF5_SUPERBLOCK_VERSION_2) {
        /* Check for non-default v1 B-tree 'K' values to store */
        if(sblock->btree_k[H5B_SNODE_ID] != HDF5_BTREE_SNODE_IK_DEF ||
                sblock->btree_k[H5B_CHUNK_ID] != HDF5_BTREE_CHUNK_IK_DEF ||
                sblock->sym_leaf_k != H5F_CRT_SYM_LEAF_DEF)
            need_ext = TRUE;
        /* Check for driver info to store */
        else if(driver_size > 0)
            need_ext = TRUE;
        else
            need_ext = FALSE;
    } /* end if */
    else
        need_ext = FALSE;

    /* Create the superblock extension for "extra" superblock data, if necessary. */
    if(need_ext) {
        H5O_loc_t       ext_loc;            /* Superblock extension object location */

        /* The superblock extension isn't actually a group, but the
         * default group creation list should work fine.
         * If we don't supply a size for the object header, HDF5 will
         * allocate H5O_MIN_SIZE by default.  This is currently
         * big enough to hold the biggest possible extension, but should
         * be tuned if more information is added to the superblock
         * extension.
         */
	if(H5F_super_ext_create(f, dxpl_id, &ext_loc) < 0)
            HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to start file's superblock extension")

        /* Create the Shared Object Header Message table and register it with
         *      the metadata cache, if this file supports shared messages.
         */
        if(f->shared->sohm_nindexes > 0) {
            /* Initialize the shared message code & write the SOHM message to the extension */
            if(H5SM_init(f, plist, &ext_loc, dxpl_id) < 0)
                HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to create SOHM table")
        } /* end if */

        /* Check for non-default v1 B-tree 'K' values to store */
        if(sblock->btree_k[H5B_SNODE_ID] != HDF5_BTREE_SNODE_IK_DEF ||
                sblock->btree_k[H5B_CHUNK_ID] != HDF5_BTREE_CHUNK_IK_DEF ||
                sblock->sym_leaf_k != H5F_CRT_SYM_LEAF_DEF) {
            H5O_btreek_t btreek;        /* v1 B-tree 'K' value message for superblock extension */

            /* Write v1 B-tree 'K' value information to the superblock extension */
            btreek.btree_k[H5B_CHUNK_ID] = sblock->btree_k[H5B_CHUNK_ID];
            btreek.btree_k[H5B_SNODE_ID] = sblock->btree_k[H5B_SNODE_ID];
            btreek.sym_leaf_k = sblock->sym_leaf_k;
            if(H5O_msg_create(&ext_loc, H5O_BTREEK_ID, H5O_MSG_FLAG_CONSTANT | H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, &btreek, dxpl_id) < 0)
                HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to update v1 B-tree 'K' value header message")
        } /* end if */

        /* Check for driver info to store */
        if(driver_size > 0) {
            H5O_drvinfo_t drvinfo;      /* Driver info */
            uint8_t dbuf[H5F_MAX_DRVINFOBLOCK_SIZE];  /* Driver info block encoding buffer */

            /* Sanity check */
            HDassert(driver_size <= H5F_MAX_DRVINFOBLOCK_SIZE);

            /* Encode driver-specific data */
            if(H5FD_sb_encode(f->shared->lf, drvinfo.name, dbuf) < 0)
                HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to encode driver information")

            /* Write driver info information to the superblock extension */
            drvinfo.len = driver_size;
            drvinfo.buf = dbuf;
            if(H5O_msg_create(&ext_loc, H5O_DRVINFO_ID, H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, &drvinfo, dxpl_id) < 0)
                HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to update driver info header message")
        } /* end if */

        /* Close superblock extension */
	if(H5F_super_ext_close(f, &ext_loc) < 0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to close file's superblock extension")
    } /* end if */

done:
    /* Cleanup on failure */
    if(ret_value < 0) {
        /* Check if the superblock has been allocated yet */
        if(sblock) {
            /* Check if we've cached it already */
            if(sblock_in_cache) {
                /* Unpin superblock in cache */
                if(H5AC_unpin_entry(f, sblock) < 0)
                    HDONE_ERROR(H5E_FILE, H5E_CANTUNPIN, FAIL, "unable to unpin superblock")

                /* Evict the superblock from the cache */
                if(H5AC_expunge_entry(f, dxpl_id, H5AC_SUPERBLOCK, super_addr, H5AC__NO_FLAGS_SET) < 0)
                    HDONE_ERROR(H5E_FILE, H5E_CANTEXPUNGE, FAIL, "unable to expunge superblock")
            } /* end if */
            else
                /* Free superblock */
                sblock = (H5F_super_t *)H5FL_FREE(H5F_super_t, sblock);

            /* Reset variables in file structure */
            f->shared->sblock = NULL;
            f->shared->super_addr = HADDR_UNDEF;
        } /* end if */
    } /* end if */

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_super_init() */


/*-------------------------------------------------------------------------
 * Function:    H5F_super_dirty
 *
 * Purpose:     Mark the file's superblock dirty
 *
 * Return:      Success:        non-negative on success
 *              Failure:        Negative
 *
 * Programmer:  Quincey Koziol
 *              August 14, 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_super_dirty(H5F_t *f)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI(H5F_super_dirty, FAIL)

    /* Sanity check */
    HDassert(f);
    HDassert(f->shared);
    HDassert(f->shared->sblock);

    /* Mark superblock dirty in cache, so change to EOA will get encoded */
    if(H5AC_mark_pinned_or_protected_entry_dirty(f, f->shared->sblock) < 0)
        HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5F_super_dirty() */


/*-------------------------------------------------------------------------
 * Function:    H5F_super_size
 *
 * Purpose:     Get storage size of the superblock and superblock extension
 *
 * Return:      Success:        non-negative on success
 *              Failure:        Negative
 *
 * Programmer:  Vailin Choi
 *              July 11, 2007
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_super_size(H5F_t *f, hid_t dxpl_id, hsize_t *super_size, hsize_t *super_ext_size)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI(H5F_super_size, FAIL)

    /* Sanity check */
    HDassert(f);
    HDassert(f->shared);
    HDassert(f->shared->sblock);

    /* Set the superblock size */
    if(super_size)
	*super_size = H5F_SUPERBLOCK_SIZE(f->shared->sblock->super_vers, f);

    /* Set the superblock extension size */
    if(super_ext_size) {
        if(H5F_addr_defined(f->shared->sblock->ext_addr)) {
            H5O_loc_t ext_loc;                  /* "Object location" for superblock extension */
            H5O_info_t oinfo;                   /* Object info for superblock extension */

            /* Set up "fake" object location for superblock extension */
            H5O_loc_reset(&ext_loc);
            ext_loc.file = f;
            ext_loc.addr = f->shared->sblock->ext_addr;

            /* Get object header info for superblock extension */
            if(H5O_get_info(&ext_loc, dxpl_id, FALSE, &oinfo) < 0)
                HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to retrieve superblock extension info")

            /* Set the superblock extension size */
            *super_ext_size = oinfo.hdr.space.total;
        } /* end if */
        else
            /* Set the superblock extension size to zero */
            *super_ext_size = (hsize_t)0;
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5F_super_size() */


/*-------------------------------------------------------------------------
 * Function:    H5F_super_ext_write_msg()
 *
 * Purpose:     Write the message with ID to the superblock extension
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Vailin Choi; Feb 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_super_ext_write_msg(H5F_t *f, hid_t dxpl_id, void *mesg, unsigned id, hbool_t may_create)
{
    hbool_t     sblock_dirty = FALSE;   /* Whether superblock was dirtied */
    H5O_loc_t 	ext_loc; 	/* "Object location" for superblock extension */
    htri_t 	status;       	/* Indicate whether the message exists or not */
    herr_t 	ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5F_super_ext_write_msg)

    /* Sanity checks */
    HDassert(f);
    HDassert(f->shared);
    HDassert(f->shared->sblock);

    /* Open/create the superblock extension object header */
    if(H5F_addr_defined(f->shared->sblock->ext_addr)) {
	if(H5F_super_ext_open(f, f->shared->sblock->ext_addr, &ext_loc) < 0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENOBJ, FAIL, "unable to open file's superblock extension")
    } /* end if */
    else {
        HDassert(may_create);
	if(H5F_super_ext_create(f, dxpl_id, &ext_loc) < 0)
	    HGOTO_ERROR(H5E_FILE, H5E_CANTCREATE, FAIL, "unable to create file's superblock extension")
        sblock_dirty = TRUE;
    } /* end else */
    HDassert(H5F_addr_defined(ext_loc.addr));

    /* Check if message with ID does not exist in the object header */
    if((status = H5O_msg_exists(&ext_loc, id, dxpl_id)) < 0)
	HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to check object header for message or message exists")

    /* Check for creating vs. writing */
    if(may_create) {
	if(status)
	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "Message should not exist")

	/* Create the message with ID in the superblock extension */
	if(H5O_msg_create(&ext_loc, id, H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, mesg, dxpl_id) < 0)
	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to create the message in object header")
    } /* end if */
    else {
	if(!status)
	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "Message should exist")

	/* Update the message with ID in the superblock extension */
	if(H5O_msg_write(&ext_loc, id, H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, mesg, dxpl_id) < 0)
	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to write the message in object header")
    } /* end else */

    /* Close the superblock extension object header */
    if(H5F_super_ext_close(f, &ext_loc) < 0)
	HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to close file's superblock extension")

done:
    /* Mark superblock dirty in cache, if necessary */
    if(sblock_dirty)
        if(H5AC_mark_pinned_or_protected_entry_dirty(f, f->shared->sblock) < 0)
            HDONE_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")

    FUNC_LEAVE_NOAPI(ret_value)
} /* H5F_super_ext_write_msg() */
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