File: process_row.c

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#include "distance.h"
#include "local_proto.h"

int process_row (int row, int start_col)
{
    int r,first_zone, col;


	/* go north */

    begin_distance(row);
    for (r=row; r >= 0 && (first_zone = find_distances(r)) >= 0; r--)
    {
	col = start_col;
	while (col <= maxcol)
	{
	    process_left(row, r, col, first_zone);
	    col = process_at(row, r, col, first_zone);
	    col = process_right (row, r, col, first_zone);
	}
    }

	/* go south */

    reset_distances();
    for(r=row+1; r < window.rows && (first_zone = find_distances(r)) >= 0; r++)
    {
	col = start_col;
	while (col <= maxcol)
	{
	    process_left(row, r, col, first_zone);
	    col = process_at(row, r, col, first_zone);
	    col = process_right (row, r, col, first_zone);
	}
    }

    return 0;
}