path: root/src/H5Abtree2.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * 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 COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://www.hdfgroup.org/licenses.               *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:		H5Abtree2.c
 *
 * Purpose:		v2 B-tree callbacks for indexing attributes on objects
 *
 *-------------------------------------------------------------------------
 */

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

#include "H5Amodule.h" /* This source code file is part of the H5A module */

/***********/
/* Headers */
/***********/
#include "H5private.h"   /* Generic Functions			*/
#include "H5Apkg.h"      /* Attributes	  			*/
#include "H5Eprivate.h"  /* Error handling		  	*/
#include "H5MMprivate.h" /* Memory management			*/
#include "H5SMprivate.h" /* Shared object header messages        */

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

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

/*
 * Data exchange structure for dense attribute storage.  This structure is
 * passed through the fractal heap layer to compare attributes.
 */
typedef struct H5A_fh_ud_cmp_t {
    /* downward */
    H5F_t                          *f;             /* Pointer to file that fractal heap is in */
    const char                     *name;          /* Name of attribute to compare      */
    const H5A_dense_bt2_name_rec_t *record;        /* v2 B-tree record for attribute */
    H5A_bt2_found_t                 found_op;      /* Callback when correct attribute is found */
    void                           *found_op_data; /* Callback data when correct attribute is found */

    /* upward */
    int cmp; /* Comparison of two attribute names */
} H5A_fh_ud_cmp_t;

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

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

/* v2 B-tree function callbacks */

/* v2 B-tree driver callbacks for 'creation order' index */
static herr_t H5A__dense_btree2_corder_store(void *native, const void *udata);
static herr_t H5A__dense_btree2_corder_compare(const void *rec1, const void *rec2, int *result);
static herr_t H5A__dense_btree2_corder_encode(uint8_t *raw, const void *native, void *ctx);
static herr_t H5A__dense_btree2_corder_decode(const uint8_t *raw, void *native, void *ctx);
static herr_t H5A__dense_btree2_corder_debug(FILE *stream, int indent, int fwidth, const void *record,
                                             const void *_udata);

/* v2 B-tree driver callbacks for 'name' index */
static herr_t H5A__dense_btree2_name_store(void *native, const void *udata);
static herr_t H5A__dense_btree2_name_compare(const void *rec1, const void *rec2, int *result);
static herr_t H5A__dense_btree2_name_encode(uint8_t *raw, const void *native, void *ctx);
static herr_t H5A__dense_btree2_name_decode(const uint8_t *raw, void *native, void *ctx);
static herr_t H5A__dense_btree2_name_debug(FILE *stream, int indent, int fwidth, const void *record,
                                           const void *_udata);

/* Fractal heap function callbacks */
static herr_t H5A__dense_fh_name_cmp(const void *obj, size_t obj_len, void *op_data);

/*********************/
/* Package Variables */
/*********************/
/* v2 B-tree class for indexing 'name' field of attributes */
const H5B2_class_t H5A_BT2_NAME[1] = {{
    /* B-tree class information */
    H5B2_ATTR_DENSE_NAME_ID,          /* Type of B-tree */
    "H5B2_ATTR_DENSE_NAME_ID",        /* Name of B-tree class */
    sizeof(H5A_dense_bt2_name_rec_t), /* Size of native record */
    NULL,                             /* Create client callback context */
    NULL,                             /* Destroy client callback context */
    H5A__dense_btree2_name_store,     /* Record storage callback */
    H5A__dense_btree2_name_compare,   /* Record comparison callback */
    H5A__dense_btree2_name_encode,    /* Record encoding callback */
    H5A__dense_btree2_name_decode,    /* Record decoding callback */
    H5A__dense_btree2_name_debug      /* Record debugging callback */
}};

/* v2 B-tree class for indexing 'creation order' field of attributes */
const H5B2_class_t H5A_BT2_CORDER[1] = {{
    /* B-tree class information */
    H5B2_ATTR_DENSE_CORDER_ID,          /* Type of B-tree */
    "H5B2_ATTR_DENSE_CORDER_ID",        /* Name of B-tree class */
    sizeof(H5A_dense_bt2_corder_rec_t), /* Size of native record */
    NULL,                               /* Create client callback context */
    NULL,                               /* Destroy client callback context */
    H5A__dense_btree2_corder_store,     /* Record storage callback */
    H5A__dense_btree2_corder_compare,   /* Record comparison callback */
    H5A__dense_btree2_corder_encode,    /* Record encoding callback */
    H5A__dense_btree2_corder_decode,    /* Record decoding callback */
    H5A__dense_btree2_corder_debug      /* Record debugging callback */
}};

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

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

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_fh_name_cmp
 *
 * Purpose:	Compares the name of a attribute in a fractal heap to another
 *              name
 *
 * Return:	SUCCEED/FAIL
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_fh_name_cmp(const void *obj, size_t obj_len, void *_udata)
{
    H5A_fh_ud_cmp_t *udata = (H5A_fh_ud_cmp_t *)_udata; /* User data for 'op' callback */
    H5A_t           *attr  = NULL;                      /* Pointer to attribute created from heap object */
    hbool_t took_ownership = FALSE;   /* Whether the "found" operator took ownership of the attribute */
    herr_t  ret_value      = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    /* Decode attribute information */
    if (NULL ==
        (attr = (H5A_t *)H5O_msg_decode(udata->f, NULL, H5O_ATTR_ID, obj_len, (const unsigned char *)obj)))
        HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, FAIL, "can't decode attribute")

    /* Compare the string values */
    udata->cmp = HDstrcmp(udata->name, attr->shared->name);

    /* Check for correct attribute & callback to make */
    if (udata->cmp == 0 && udata->found_op) {
        /* Check whether we should "reconstitute" the shared message info */
        if (udata->record->flags & H5O_MSG_FLAG_SHARED)
            H5SM_reconstitute(&(attr->sh_loc), udata->f, H5O_ATTR_ID, udata->record->id);

        /* Set the creation order index for the attribute */
        attr->shared->crt_idx = udata->record->corder;

        /* Make callback */
        if ((udata->found_op)(attr, &took_ownership, udata->found_op_data) < 0)
            HGOTO_ERROR(H5E_OHDR, H5E_CANTOPERATE, FAIL, "attribute found callback failed")
    } /* end if */

done:
    /* Release the space allocated for the attribute */
    if (attr && !took_ownership)
        H5O_msg_free(H5O_ATTR_ID, attr);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A__dense_fh_name_cmp() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_name_store
 *
 * Purpose:	Store user information into native record for v2 B-tree
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_name_store(void *_nrecord, const void *_udata)
{
    const H5A_bt2_ud_ins_t   *udata   = (const H5A_bt2_ud_ins_t *)_udata;
    H5A_dense_bt2_name_rec_t *nrecord = (H5A_dense_bt2_name_rec_t *)_nrecord;

    FUNC_ENTER_PACKAGE_NOERR

    /* Copy user information info native record */
    nrecord->id     = udata->id;
    nrecord->flags  = udata->common.flags;
    nrecord->corder = udata->common.corder;
    nrecord->hash   = udata->common.name_hash;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5A__dense_btree2_name_store() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_name_compare
 *
 * Purpose:	Compare two native information records, according to some key
 *
 * Return:	<0 if rec1 < rec2
 *              =0 if rec1 == rec2
 *              >0 if rec1 > rec2
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_name_compare(const void *_bt2_udata, const void *_bt2_rec, int *result)
{
    const H5A_bt2_ud_common_t      *bt2_udata = (const H5A_bt2_ud_common_t *)_bt2_udata;
    const H5A_dense_bt2_name_rec_t *bt2_rec   = (const H5A_dense_bt2_name_rec_t *)_bt2_rec;
    herr_t                          ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    /* Sanity check */
    assert(bt2_udata);
    assert(bt2_rec);

    /* Check hash value */
    if (bt2_udata->name_hash < bt2_rec->hash)
        *result = (-1);
    else if (bt2_udata->name_hash > bt2_rec->hash)
        *result = 1;
    else {
        H5A_fh_ud_cmp_t fh_udata; /* User data for fractal heap 'op' callback */
        H5HF_t         *fheap;    /* Fractal heap handle to use for finding object */

        /* Sanity check */
        assert(bt2_udata->name_hash == bt2_rec->hash);

        /* Prepare user data for callback */
        /* down */
        fh_udata.f             = bt2_udata->f;
        fh_udata.name          = bt2_udata->name;
        fh_udata.record        = bt2_rec;
        fh_udata.found_op      = bt2_udata->found_op;
        fh_udata.found_op_data = bt2_udata->found_op_data;

        /* up */
        fh_udata.cmp = 0;

        /* Check for attribute in shared storage */
        if (bt2_rec->flags & H5O_MSG_FLAG_SHARED)
            fheap = bt2_udata->shared_fheap;
        else
            fheap = bt2_udata->fheap;
        assert(fheap);

        /* Check if the user's attribute and the B-tree's attribute have the same name */
        if (H5HF_op(fheap, &bt2_rec->id, H5A__dense_fh_name_cmp, &fh_udata) < 0)
            HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")

        /* Callback will set comparison value */
        *result = fh_udata.cmp;
    } /* end else */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5A__dense_btree2_name_compare() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_name_encode
 *
 * Purpose:	Encode native information into raw form for storing on disk
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_name_encode(uint8_t *raw, const void *_nrecord, void H5_ATTR_UNUSED *ctx)
{
    const H5A_dense_bt2_name_rec_t *nrecord = (const H5A_dense_bt2_name_rec_t *)_nrecord;

    FUNC_ENTER_PACKAGE_NOERR

    /* Encode the record's fields */
    H5MM_memcpy(raw, nrecord->id.id, (size_t)H5O_FHEAP_ID_LEN);
    raw += H5O_FHEAP_ID_LEN;
    *raw++ = nrecord->flags;
    UINT32ENCODE(raw, nrecord->corder);
    UINT32ENCODE(raw, nrecord->hash);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5A__dense_btree2_name_encode() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_name_decode
 *
 * Purpose:	Decode raw disk form of record into native form
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_name_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR_UNUSED *ctx)
{
    H5A_dense_bt2_name_rec_t *nrecord = (H5A_dense_bt2_name_rec_t *)_nrecord;

    FUNC_ENTER_PACKAGE_NOERR

    /* Decode the record's fields */
    H5MM_memcpy(nrecord->id.id, raw, (size_t)H5O_FHEAP_ID_LEN);
    raw += H5O_FHEAP_ID_LEN;
    nrecord->flags = *raw++;
    UINT32DECODE(raw, nrecord->corder);
    UINT32DECODE(raw, nrecord->hash);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5A__dense_btree2_name_decode() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_name_debug
 *
 * Purpose:	Debug native form of record
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_name_debug(FILE *stream, int indent, int fwidth, const void *_nrecord,
                             const void H5_ATTR_UNUSED *_udata)
{
    const H5A_dense_bt2_name_rec_t *nrecord = (const H5A_dense_bt2_name_rec_t *)_nrecord;

    FUNC_ENTER_PACKAGE_NOERR

    fprintf(stream, "%*s%-*s {%016" PRIx64 ", %02" PRIx8 ", %u, %08" PRIx32 "}\n", indent, "", fwidth,
            "Record:", nrecord->id.val, nrecord->flags, (unsigned)nrecord->corder, nrecord->hash);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5A__dense_btree2_name_debug() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_corder_store
 *
 * Purpose:	Store user information into native record for v2 B-tree
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_corder_store(void *_nrecord, const void *_udata)
{
    const H5A_bt2_ud_ins_t     *udata   = (const H5A_bt2_ud_ins_t *)_udata;
    H5A_dense_bt2_corder_rec_t *nrecord = (H5A_dense_bt2_corder_rec_t *)_nrecord;

    FUNC_ENTER_PACKAGE_NOERR

    /* Copy user information info native record */
    nrecord->id     = udata->id;
    nrecord->flags  = udata->common.flags;
    nrecord->corder = udata->common.corder;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5A__dense_btree2_corder_store() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_corder_compare
 *
 * Purpose:	Compare two native information records, according to some key
 *
 * Return:	<0 if rec1 < rec2
 *              =0 if rec1 == rec2
 *              >0 if rec1 > rec2
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_corder_compare(const void *_bt2_udata, const void *_bt2_rec, int *result)
{
    const H5A_bt2_ud_common_t        *bt2_udata = (const H5A_bt2_ud_common_t *)_bt2_udata;
    const H5A_dense_bt2_corder_rec_t *bt2_rec   = (const H5A_dense_bt2_corder_rec_t *)_bt2_rec;

    FUNC_ENTER_PACKAGE_NOERR

    /* Sanity check */
    assert(bt2_udata);
    assert(bt2_rec);

    /* Check creation order value */
    if (bt2_udata->corder < bt2_rec->corder)
        *result = -1;
    else if (bt2_udata->corder > bt2_rec->corder)
        *result = 1;
    else
        *result = 0;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5A__dense_btree2_corder_compare() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_corder_encode
 *
 * Purpose:	Encode native information into raw form for storing on disk
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_corder_encode(uint8_t *raw, const void *_nrecord, void H5_ATTR_UNUSED *ctx)
{
    const H5A_dense_bt2_corder_rec_t *nrecord = (const H5A_dense_bt2_corder_rec_t *)_nrecord;

    FUNC_ENTER_PACKAGE_NOERR

    /* Encode the record's fields */
    H5MM_memcpy(raw, nrecord->id.id, (size_t)H5O_FHEAP_ID_LEN);
    raw += H5O_FHEAP_ID_LEN;
    *raw++ = nrecord->flags;
    UINT32ENCODE(raw, nrecord->corder);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5A__dense_btree2_corder_encode() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_corder_decode
 *
 * Purpose:	Decode raw disk form of record into native form
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_corder_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR_UNUSED *ctx)
{
    H5A_dense_bt2_corder_rec_t *nrecord = (H5A_dense_bt2_corder_rec_t *)_nrecord;

    FUNC_ENTER_PACKAGE_NOERR

    /* Decode the record's fields */
    H5MM_memcpy(nrecord->id.id, raw, (size_t)H5O_FHEAP_ID_LEN);
    raw += H5O_FHEAP_ID_LEN;
    nrecord->flags = *raw++;
    UINT32DECODE(raw, nrecord->corder);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5A__dense_btree2_corder_decode() */

/*-------------------------------------------------------------------------
 * Function:	H5A__dense_btree2_corder_debug
 *
 * Purpose:	Debug native form of record
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A__dense_btree2_corder_debug(FILE *stream, int indent, int fwidth, const void *_nrecord,
                               const void H5_ATTR_UNUSED *_udata)
{
    const H5A_dense_bt2_corder_rec_t *nrecord = (const H5A_dense_bt2_corder_rec_t *)_nrecord;

    FUNC_ENTER_PACKAGE_NOERR

    fprintf(stream, "%*s%-*s {%016" PRIx64 ", %02" PRIx8 ", %u}\n", indent, "", fwidth,
            "Record:", nrecord->id.val, nrecord->flags, (unsigned)nrecord->corder);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5A__dense_btree2_corder_debug() */