#include <stdlib.h>
#include <grass/imagery.h>
#include <grass/glocale.h>
#include "bouman.h"
#include "local_proto.h"


int openfiles (struct parms *parms, struct files *files)
{
    struct Ref Ref;	/* subgroup reference list */
    int n;


    if (!I_get_subgroup_ref (parms->group, parms->subgroup, &Ref))
        G_fatal_error(_("Unable to read REF file for subgroup [%s] in group [%s]."),
                parms->subgroup, parms->group);

    if (Ref.nfiles <= 0)
        G_fatal_error(_("Subgroup [%s] in group [%s] contains no files."),
                parms->subgroup, parms->group);

    /* allocate file descriptors, and io buffer */
    files->cellbuf = G_allocate_cell_buf();
    files->isdata = G_malloc(G_window_cols());

    files->nbands    = Ref.nfiles;
    files->band_fd   = (int *) G_calloc (Ref.nfiles, sizeof(int));

    /* open all group maps for reading */
    for (n = 0; n < Ref.nfiles; n++)
	files->band_fd[n] = open_cell_old(Ref.file[n].name,Ref.file[n].mapset);

    /* open output map */
    files->output_fd = open_cell_new (parms->output_map);

    return 0;
}