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#include "gis.h"
/*
* creates new category and color structures from the patching
* files category and color files
*
* the first patch file is used as the basis. Its cats and colr
* are read into the final cats/colr structures.
* Then the other patching layers cats/colr are added to the
* final cats/colr only if these patching layers actually
* contributed new categories to the final result
*/
int support (
char **names,
struct Cell_stats *statf,int nfiles,
struct Categories *cats,
int *cats_ok,
struct Colors *colr,
int *colr_ok,
RASTER_MAP_TYPE out_type)
{
int i;
char *mapset;
struct Categories pcats;
struct Colors pcolr;
CELL n;
long count;
int red,grn,blu;
int do_cats, do_colr;
mapset = G_find_cell (names[0], "");
*cats_ok = 1;
*colr_ok = 1;
if (G_read_cats (names[0], mapset, cats) < 0)
*cats_ok = 0;
G_suppress_warnings (1);
if (G_read_colors (names[0], mapset, colr) < 0)
*colr_ok = 0;
G_suppress_warnings (0);
if (*cats_ok == 0 && *colr_ok == 0)
return 0;
for (i = 1; i < nfiles; i++)
{
mapset = G_find_cell (names[i], "");
do_cats = *cats_ok && (G_read_cats (names[i], mapset, &pcats) >= 0);
G_suppress_warnings (1);
do_colr = *colr_ok && (G_read_colors (names[i], mapset, &pcolr) >= 0);
G_suppress_warnings (0);
if (!do_cats && !do_colr) continue;
if(out_type == CELL_TYPE)
{
G_rewind_cell_stats (statf + i);
while (G_next_cell_stat (&n, &count, statf + i))
if (n && !G_find_cell_stat (n, &count, statf))
{
if(do_cats)
{
G_update_cell_stats (&n, 1, statf);
G_set_cat (n, G_get_cat (n, &pcats), cats);
}
if(do_colr)
{
G_get_color (n, &red, &grn, &blu, &pcolr);
G_set_color (n, red, grn, blu, colr);
}
}
}
/* else the color will be the color of the first map */
if (do_cats)
G_free_cats (&pcats);
if (do_colr )
/* otherwise this memory is used in colr pointer */
G_free_colors (&pcolr);
}
return 1;
}
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