/* write a legend
* MputLegend writes a (version 2) legend to a map replacing
* the old one if existent.
* See csfattr.h for the legend structure.
*
* returns
* 0 in case of an error,
* nonzero otherwise
*
* Merrno
* NOACCESS
* WRITE_ERROR
*/
int MputLegend(
MAP *m, /* Map handle */
CSF_LEGEND *l, /* read-write, array with name and entries, the entries
* are sorted before writing to the file.
* Strings are padded with zeros.
*/
size_t nrEntries) /* number of array elements. That is name plus real legend entries */
{
int i = NrLegendEntries(m);
CSF_ATTR_ID id = i < 0 ? ATTR_ID_LEGEND_V1 : ATTR_ID_LEGEND_V2;
if (i)
if (! MdelAttribute(m, id))
return 0;
SortEntries(l, nrEntries);
if (CsfSeekAttrSpace(m, ATTR_ID_LEGEND_V2, (size_t)(nrEntries*CSF_LEGEND_ENTRY_SIZE)) == 0)
return 0;
for(i = 0; i < (int)nrEntries; i++)
{
if(
m->write(&(l[i].nr), sizeof(INT4), (size_t)1, m->fp) != 1 ||
m->write(
CsfStringPad(l[i].descr,(size_t)CSF_LEGEND_DESCR_SIZE),
sizeof(char), (size_t)CSF_LEGEND_DESCR_SIZE, m->fp)
!= CSF_LEGEND_DESCR_SIZE )
{
M_ERROR(WRITE_ERROR);
return 0;
}
}
return 1;
}
/* replace an attribute (LIBRARY_INTERNAL)
*
*/
CSF_ATTR_ID CsfUpdateAttribute(
MAP *m, /* map handle */
CSF_ATTR_ID id, /* attribute identification */
size_t itemSize, /* size of each attribute element.
* 1 or sizeof(char) in case of a
* string
*/
size_t nitems, /* number of attribute elements or
* strlen+1 in case of a variable character
* string field. Don't forget to pad a
* non-variable field with '\0'!
*/
void *attr) /* buffer containing attribute */
{
PRECOND(CsfValidSize(itemSize));
if (CsfAttributeSize(m,id))
if (! MdelAttribute(m,id))
return 0;
return CsfPutAttribute(m,id,itemSize,nitems, attr);
}
