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#include <stdlib.h>
#include <grass/gis.h>
#include <grass/raster.h>
#include <grass/glocale.h>
#include "local_proto.h"
/*
* check_stats() - Check and update statistics
*
* RETURN: EXIT_SUCCESS / EXIT_FAILURE
*/
int check_stats(const char *name)
{
RASTER_MAP_TYPE data_type;
struct Categories cats;
struct Range range;
struct FPRange fprange;
int cats_ok;
int max;
data_type = Rast_map_type(name, "");
G_message(_("\n Updating statistics for [%s]"), name);
if (do_histogram(name) < 0)
return 0;
/* get range */
if (data_type == CELL_TYPE)
Rast_read_range(name, "", &range);
else
Rast_read_fp_range(name, "", &fprange);
max = (data_type == CELL_TYPE ? range.max : fprange.max);
/* Get category status */
cats_ok = (Rast_read_cats(name, "", &cats) >= 0);
/* Further category checks */
if (!cats_ok)
Rast_init_cats("", &cats);
else if (cats.num != max) {
cats.num = max;
cats_ok = 0;
}
/* Update categories if needed */
if (!cats_ok) {
G_message(_(" Updating the number of categories for "
"[%s]\n\n"),
name);
Rast_write_cats(name, &cats);
Rast_free_cats(&cats);
}
return 0;
}
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