#include <grass/gis.h>
#include <grass/raster.h>
#include <grass/segment.h>
#include "Gwater.h"

static char *me = "cseg_read_cell";

int cseg_read_cell(CSEG *cseg, char *map_name, char *mapset)
{
    GW_LARGE_INT row, rows;
    int map_fd;
    CELL *buffer;

    cseg->name = NULL;
    cseg->mapset = NULL;

    map_fd = Rast_open_old(map_name, mapset);
    rows = Rast_window_rows();
    buffer = Rast_allocate_c_buf();
    for (row = 0; row < rows; row++) {
        Rast_get_c_row(map_fd, buffer, row);
        if (Segment_put_row(&(cseg->seg), buffer, row) < 0) {
            G_free(buffer);
            Rast_close(map_fd);
            G_warning("%s(): unable to segment put row for [%s] in [%s]", me,
                      map_name, mapset);
            return (-1);
        }
    }

    Rast_close(map_fd);
    G_free(buffer);

    cseg->name = G_store(map_name);
    cseg->mapset = G_store(mapset);

    return 0;
}
