r.in.sunrast

[Bob Courtney]

There is a bug in r.in.sunrast. The sun raster format assumes an even
number of pixels for  each row in storage. If the input image has an odd
number of pixels in a row, then an extra blank byte is added to each
row  in the file.
The result is that images with an even number of pixels import properly
using r.in.sunrast, but images with an odd # in each row are offset
by 1 byte to the preceeding row.

FIX : 

( caveat, I am not a C programmer!)

cd src.alpha/raster/r.in.sunrast/cmd

and edit main.c

replace the function rasttocell with :

rasttocell (rast_fd, cell_fd, nrows, ncols)
{
    unsigned char *raster;
    CELL *cell;
    int row, col, ncol_fix ;

    /* check if row is even or odd */
    ncol_fix = ncols;
    if ( ncols % 2 )
           ncol_fix += 1 ;

    cell = G_allocate_cell_buf();
    raster = (unsigned char *) G_malloc(ncols);


    if (verbose)
        fprintf (stderr, "complete ... ");
    for (row = 0; row < nrows; row++)
    {
        if (verbose)
            G_percent (row, nrows, 2);
        if (read (rast_fd, raster, ncol_fix) != ncol_fix)
            return -1;
        for (col = 0; col < ncols; col++)
            cell[col] = (CELL) raster[col];
        if (G_put_map_row (cell_fd, cell) < 0)
            exit(1);
    }
    if (verbose)
        G_percent (row, nrows, 2);
    return 1;
}

and recompile

Good Luck

Bob Courtney
Atlantic Geoscience Centre