hdf5/src/H5Fio.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:             H5Fio.c
 *                      Jan 10 2008
 *                      Quincey Koziol <koziol@hdfgroup.org>
 *
 * Purpose:             File I/O routines.
 *
 *-------------------------------------------------------------------------
 */

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

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


/***********/
/* Headers */
/***********/
#include "H5private.h"		/* Generic Functions			*/
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5Fpkg.h"             /* File access				*/
#include "H5FDprivate.h"	/* File drivers				*/


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


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


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


/********************/
/* Local Prototypes */
/********************/


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


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


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



/*-------------------------------------------------------------------------
 * Function:	H5F_block_read
 *
 * Purpose:	Reads some data from a file/server/etc into a buffer.
 *		The data is contiguous.	 The address is relative to the base
 *		address for the file.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Jul 10 1997
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_block_read(const H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
    hid_t dxpl_id, void *buf/*out*/)
{
    htri_t      accumulated;            /* Whether the data was accepted by the metadata accumulator */
    herr_t      ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI(H5F_block_read, FAIL)

    HDassert(f);
    HDassert(f->shared);
    HDassert(buf);

    /* Check for attempting I/O on 'temporary' file address */
    if(H5F_addr_le(f->shared->tmp_addr, (addr + size)))
        HGOTO_ERROR(H5E_IO, H5E_BADRANGE, FAIL, "attempting I/O in temporary file space")

    /* Check if this I/O can be satisfied by the metadata accumulator */
    if((accumulated = H5F_accum_read(f, dxpl_id, type, addr, size, buf)) < 0)
        HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "read from metadata accumulator failed")
    else if(accumulated == FALSE) {
        /* Read the data */
        if(H5FD_read(f->shared->lf, dxpl_id, type, addr, size, buf) < 0)
            HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
    } /* end else */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_block_read() */


/*-------------------------------------------------------------------------
 * Function:	H5F_block_write
 *
 * Purpose:	Writes some data from memory to a file/server/etc.  The
 *		data is contiguous.  The address is relative to the base
 *		address.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Jul 10 1997
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5F_block_write(const H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
    hid_t dxpl_id, const void *buf)
{
    htri_t      accumulated;            /* Whether the data was accepted by the metadata accumulator */
    herr_t      ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI(H5F_block_write, FAIL)
#ifdef QAK
HDfprintf(stderr, "%s: write to addr = %a, size = %Zu\n", FUNC, addr, size);
#endif /* QAK */

    HDassert(f);
    HDassert(f->shared);
    HDassert(f->intent & H5F_ACC_RDWR);
    HDassert(buf);

    /* Check for attempting I/O on 'temporary' file address */
    if(H5F_addr_le(f->shared->tmp_addr, (addr + size)))
        HGOTO_ERROR(H5E_IO, H5E_BADRANGE, FAIL, "attempting I/O in temporary file space")

    /* Check for accumulating metadata */
    if((accumulated = H5F_accum_write(f, dxpl_id, type, addr, size, buf)) < 0)
        HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "write to metadata accumulator failed")
    else if(accumulated == FALSE) {
        /* Write the data */
        if(H5FD_write(f->shared->lf, dxpl_id, type, addr, size, buf) < 0)
            HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
    } /* end else */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_block_write() */