#include <grass/gis.h>
#include "cseg.h"

int bseg_put (BSEG *bseg, CELL *value, int row, int col)
{
	unsigned char	old_value;
	char errmsg[200];

	if (segment_get (&(bseg->seg), (int *)&old_value, row, col>>3) < 0)
	{
		sprintf (errmsg,
		"bseg_put(): could not read segment file at r:%d c:%d",
			(int) row, (int) col);
		G_warning (errmsg);
		return -1;
	}
	if (*value)
		old_value |= (1 << (col & 7));
	else
		old_value &= ~(1 << (col & 7));
	if (segment_put (&(bseg->seg), (int *)&old_value, row, col>>3) < 0)
	{
		sprintf (errmsg,
	"bseg_put(): could not write segment file at r:%d c:%d",
			(int) row, (int) col);
		G_warning (errmsg);
		return -2;
	}
	return 0;
}