1. Elena Pourmal
  2. hdf5_ep

Source

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/* Declare extern the free list to manage the H5G_node_t struct */
H5FL_EXTERN(H5G_node_t);
​
/* Declare extern the free list to manage sequences of H5G_entry_t's */
H5FL_SEQ_EXTERN(H5G_entry_t);
​
•
/*-------------------------------------------------------------------------
 * Function:    H5G_node_load
 * Function:    H5G_node_load
 *
 * Purpose: Loads a symbol table node from the file.
 * Purpose:     Loads a symbol table node from the file.
 *
 * Return:  Success:    Ptr to the new table.
 * Return:      Success:    Ptr to the new table.
 *              Failure:    NULL
 *
 *      Failure:    NULL
 *
 * Programmer:  Robb Matzke
 *      matzke@llnl.gov
 *      Jun 23 1997
 * Programmer:  Robb Matzke
 *              matzke@llnl.gov
 *              Jun 23 1997
 *
 *-------------------------------------------------------------------------
 */
static H5G_node_t *
H5G_node_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *udata)
{
    H5G_node_t         *sym = NULL;
    H5WB_t                 *wb = NULL;     /* Wrapped buffer for node data */
    uint8_t                 node_buf[H5G_NODE_BUF_SIZE]; /* Buffer for node */
    uint8_t        *node;           /* Pointer to node buffer */
    H5G_node_t         *sym = NULL;
    H5WB_t             *wb = NULL;                      /* Wrapped buffer for node data */
    uint8_t             node_buf[H5G_NODE_BUF_SIZE];    /* Buffer for node */
    uint8_t            *node;                           /* Pointer to node buffer */
    const uint8_t      *p;
    H5G_node_t         *ret_value;  /*for error handling */
    const uint8_t      *p_end;
    H5G_node_t         *ret_value;                      /* Return value */
​
    FUNC_ENTER_NOAPI_NOINIT
​
    /*
     * Check arguments.
     */
    /* Sanity checks */
    HDassert(f);
    HDassert(H5F_addr_defined(addr));
    HDassert(udata);
​
    /*
     * Initialize variables.
     */
​
    /* Allocate symbol table data structures */
    if(NULL == (sym = H5FL_CALLOC(H5G_node_t)))
    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
    sym->node_size = H5G_NODE_SIZE(f);
    if(NULL == (sym->entry = H5FL_SEQ_CALLOC(H5G_entry_t, (size_t)(2 * H5F_SYM_LEAF_K(f)))))
    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
​
    /* Wrap the local buffer for serialized node info */
    if(NULL == (wb = H5WB_wrap(node_buf, sizeof(node_buf))))
        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, NULL, "can't wrap buffer")
​
    /* Get a pointer to a buffer that's large enough for node */
    if(NULL == (node = (uint8_t *)H5WB_actual(wb, sym->node_size)))
        HGOTO_ERROR(H5E_SYM, H5E_NOSPACE, NULL, "can't get actual buffer")
​
    /* Read the serialized symbol table node. */
    if(H5F_block_read(f, H5FD_MEM_BTREE, addr, sym->node_size, dxpl_id, node) < 0)
    HGOTO_ERROR(H5E_SYM, H5E_READERROR, NULL, "unable to read symbol table node")
        HGOTO_ERROR(H5E_SYM, H5E_READERROR, NULL, "unable to read symbol table node")
​
    /* Get temporary pointer to serialized node */
    p = node;
​
    /* Get a pointer to the end of the node. This ensures we don't run off
     * the end of the buffer if the file is corrupt.
     */
    p_end = p + sym->node_size - 1;
​
    /* magic */
    if(HDmemcmp(p, H5G_NODE_MAGIC, (size_t)H5_SIZEOF_MAGIC))
    HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "bad symbol table node signature")
        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "bad symbol table node signature")
    p += 4;
​
    /* version */
    if(H5G_NODE_VERS != *p++)
    HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "bad symbol table node version")
        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "bad symbol table node version")
​
    /* reserved */
    p++;
​
    /* number of symbols */
    UINT16DECODE(p, sym->nsyms);
​
    /* entries */
    if(H5G__ent_decode_vec(f, &p, sym->entry, sym->nsyms) < 0)
    HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "unable to decode symbol table entries")
    if(H5G__ent_decode_vec(f, &p, p_end, sym->entry, sym->nsyms) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "unable to decode symbol table entries")
​
    /* Set return value */
    ret_value = sym;
​
done:
    /* Release resources */
    if(wb && H5WB_unwrap(wb) < 0)
        HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, NULL, "can't close wrapped buffer")
    if(!ret_value)
        if(sym && H5G__node_free(sym) < 0)