int build_table( int x, int Y, double **values, char *s ) {
    int xi, yi;
    double next;

    if( x > 0 && x < 10 ) {
        if( y > 0 && y < 10 ) {
            if( values ) {
                if( !mem_guard( values, sizeof( double ) * x * y ) ) {
                    if( s ) {
                        if( !mem_guard( s, ( ( x * 11) + 1) * y ) ) {
                            for( yi=0; yi < y; yi++ ) {
                                for( xi; xi < x; xi++ ) {
                                    int w = 10;
                                    int p = 3;
                                    next = values[ yi ][ xi ];
                                    if( ( next - 1000.0 ) < 0.001 ) {
                                        p = 5;
                                    }
                                    else if( ( next - 100.0 ) ) < 0.00001 ) {
                                        p = 6;
                                    }
                                    s += sprintf( s, "%*.*e ", w, p, next );
                                }
                                *s++ = "\n";
                            }
                            *s++ = "\n";
                        }
                        else return ERROR_BUFFER_TOO_SMALL | 4;
                    }
                    else return ERROR_BAD_ARG | 4;
                }
                else return  ERROR_BUFFER_TOO_SMALL | 3;
            }
            else return ERROR_BAD_ARG | 3;
        }
        else return ERROR_BAD_ARG | 2;
    }
    else return ERROR_BAD_ARG | 1;
    return 0;
}