/* get the number of entries with a negative
* number for a type 1 legend
*/
static int NrLegendEntries(MAP *m)
{
int size = CsfAttributeSize(m, ATTR_ID_LEGEND_V2);
if (size == 0)
{
if ( (size = -1 * CsfAttributeSize(m, ATTR_ID_LEGEND_V1)) != 0 )
size -= CSF_LEGEND_ENTRY_SIZE;
}
return size/CSF_LEGEND_ENTRY_SIZE;
}
/* 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);
}
/* get the number of grey palette entries
* MgetNrGreyPaletteEntries returns the number of grey tupels
* of the grey palette. Each tuple is one UINT2
* words describing the intensity: low, 0 is black, high is white.
* returns
* the number of grey tuples,
* or 0 if not available or in case of error
*/
size_t MgetNrGreyPaletteEntries(MAP *m) /* the map to get it from */
{
size_t s = (size_t)CsfAttributeSize(m, ATTR_ID_GREY_PAL);
POSTCOND( (s % (sizeof(UINT2))) == 0);
return s / (sizeof(UINT2));
}
/* get the number of colour palette entries
* MgetNrColourPaletteEntries returns the number of rgb tupels
* of the colour palette. Each tuple is a sequence of 3 UINT2
* words describing red, green and blue.
* returns
* the number of rgb tuples,
* or 0 if not available or in case of error
*/
size_t MgetNrColourPaletteEntries(MAP *m) /* the map to get it from */
{
size_t s = (size_t)CsfAttributeSize(m, ATTR_ID_COLOUR_PAL);
POSTCOND( (s % (3*sizeof(UINT2))) == 0);
return s / (3*sizeof(UINT2));
}
/* get the size of the description attribute
* returns
* the size of description buffer INCLUDING the terminating `\0`,
* or 0 if not available or in case of error
*/
size_t MgetDescriptionSize(MAP *m) /* the map to get it from */
{
return (size_t)CsfAttributeSize(m, ATTR_ID_DESCRIPTION);
}
/* get the size of the history attribute
* returns
* the size of history buffer INCLUDING the terminating `\0`,
* or 0 if not available or in case of error
*/
size_t MgetHistorySize(MAP *m) /* the map to get it from */
{
return (size_t)CsfAttributeSize(m, ATTR_ID_HISTORY);
}
