int32
getElement(int desc, char **pdata)
{
int32 length;
int32 fid;
length = he_desc[desc].length;
/* alloc memory to read the element in */
*pdata = (char *) HDmalloc(length);
if (*pdata == NULL)
return FAIL;
/* read in the element and check for error */
if ((fid = Hopen(he_file, DFACC_READ, 0)) == 0)
{
HEprint(stderr, 0);
return FAIL;
}
if (Hgetelement(fid, he_desc[desc].tag, he_desc[desc].ref, (unsigned char *) (*pdata)) < 0)
{
HDfree(*pdata);
fprintf(stderr, "Cannot read element.\n");
return FAIL;
}
Hclose(fid);
return length;
}
/*
** NAME
** DFgetelement -- read an entire data element
** USAGE
** int32 DFgetelement(dfile, tag, ref, ptr)
** DF *dfile; IN: pointer to open DF file
** uint16 tag; IN: tag of element
** uint16 ref; IN: ref number of element
** char *ptr; IN: pointer to space for data element
** RETURNS
** number of bytes read on success, -1 on failure
** DESCRIPTION
** Reads in a data element from an HDF file.
** GLOBAL VARIABLES
** COMMENTS, BUGS, ASSUMPTIONS
** Currently, this function returns 0 on success, not #bytes read.
** EXAMPLES
** REVISION LOG
*/
int32
DFgetelement(DF * dfile, uint16 tag, uint16 ref, char *ptr)
{
if (DFIcheck(dfile) != 0)
{
DFerror = DFE_NOTOPEN;
return (-1);
}
else
DFerror = DFE_NONE;
/* test
if (DFelstat == DFEL_RESIDENT) {
Hputelement(DFid, acc_tag, acc_ref, DFelement, DFelsize);
HDfree(DFelement);
DFIclearacc();
}
test */
if (Hgetelement(DFid, tag, ref, (unsigned char *) ptr) == -1)
{
DFerror = (int)HEvalue(1);
return (-1);
}
else
return (Hlength(DFid, tag, ref));
}
int32
vimakecompat(HFILEID f)
{
VGROUP *vg;
VDATA *vs;
uint8 *buf = NULL; /* to store an old vdata or vgroup descriptor */
int32 old_bsize = 0, bsize=0;
int32 aid;
int32 ret;
uintn u;
uint16 tag=DFTAG_NULL, ref=DFTAG_NULL;
CONSTR(FUNC, "vimakecompat");
/* ============================================= */
/* --- read all vgs and convert each --- */
/* allocate space for vg */
if (NULL == (vg =VIget_vgroup_node()))
HRETURN_ERROR(DFE_NOSPACE, 0);
ret = aid = Hstartread(f, (uint16) OLD_VGDESCTAG, DFREF_WILDCARD);
while (ret != FAIL)
{
HQuerytagref(aid, &tag, &ref);
HQuerylength(aid, &bsize);
if (buf == NULL || bsize > old_bsize)
{
if (buf != NULL)
HDfree((VOIDP) buf);
if ((buf = (uint8 *) HDmalloc(bsize)) == NULL)
HRETURN_ERROR(DFE_NOSPACE, 0);
old_bsize = bsize;
} /* end if */
ret = Hgetelement(f, (uint16) OLD_VGDESCTAG, ref, (uint8 *) buf);
if (ret == FAIL)
{
HDfree((VOIDP) buf);
HRETURN_ERROR(DFE_READERROR, 0)
} /* end if */
oldunpackvg(vg, buf, &bsize);
/* add new items */
vg->vgclass = NULL;
/* vg->vgclass[0] = '\0'; */
vg->extag = 0;
vg->exref = 0;
vg->version = 2; /* version 2 */
vg->more = 0;
/* inside each vgroup, change the old tags to new */
for (u = 0; u < (uintn)vg->nvelt; u++)
if (vg->tag[u] == OLD_VGDESCTAG)
vg->tag[u] = NEW_VGDESCTAG;
else if (vg->tag[u] == OLD_VSDESCTAG)
vg->tag[u] = NEW_VSDESCTAG;
else /* BAD */
HERROR(DFE_NOTINSET);
vpackvg(vg, buf, &bsize);
ret = Hputelement(f, VGDESCTAG, ref, (uint8 *) buf, bsize);
HDfree((VOIDP) buf);
if (ret == FAIL)
HRETURN_ERROR(DFE_WRITEERROR, 0);
ret = Hnextread(aid, (uint16) OLD_VGDESCTAG, DFREF_WILDCARD, DF_CURRENT);
} /* while */
