/* Bits characterizing cell */
#define HOLE           (char)0x01  /* a conducting hole or obstacle */
#define CELL_is_MODULE (char)0x02  /* auto placement occupied by a module */
#define CELL_is_EDGE   (char)0x20  /* Area and auto-placement: limiting cell
                                    * contour (Board, Zone) */
#define CELL_is_FRIEND (char)0x40  /* Area and auto-placement: cell part of the
                                    * net */
#define CELL_is_ZONE   (char)0x80  /* Area and auto-placement: cell available */

/* Bit masks for presence of obstacles to autorouting */
#define OCCUPE            1  /* Autorouting: obstacle tracks and vias. */
#define VIA_IMPOSSIBLE    2  /* Autorouting: obstacle for vias. */
#define CURRENT_PAD       4


/* traces radiating outward from a hole to a side or corner */
#define HOLE_NORTH        0x00000002L /* upward       */
#define HOLE_NORTHEAST    0x00000004L /* upward and right */
#define HOLE_EAST         0x00000008L /* to the right     */
#define HOLE_SOUTHEAST    0x00000010L /* downward and right   */
#define HOLE_SOUTH        0x00000020L /* downward     */
#define HOLE_SOUTHWEST    0x00000040L /* downward and left    */
#define HOLE_WEST         0x00000080L /* to the left      */
#define HOLE_NORTHWEST    0x00000100L /* upward and left  */

/* straight lines through the center */
#define LINE_HORIZONTAL   0x00000002L /* left-to-right line   */
#define LINE_VERTICAL     0x00000004L /* top-to-bottom line   */

/* lines cutting across a corner, connecting adjacent sides */
#define CORNER_NORTHEAST  0x00000008L /* upper right corner   */
#define CORNER_SOUTHEAST  0x00000010L /* lower right corner   */
#define CORNER_SOUTHWEST  0x00000020L /* lower left corner    */
#define CORNER_NORTHWEST  0x00000040L /* upper left corner    */

/* diagonal lines through the center */
#define DIAG_NEtoSW       0x00000080L /* northeast to southwest */
#define DIAG_SEtoNW       0x00000100L /* southeast to northwest */

/* 135 degree angle side-to-far-corner lines */
#define BENT_NtoSE        0x00000200L /* north to southeast   */
#define BENT_NtoSW        0x00000400L /* north to southwest   */
#define BENT_EtoSW        0x00000800L /* east to southwest    */
#define BENT_EtoNW        0x00001000L /* east to northwest    */
#define BENT_StoNW        0x00002000L /* south to northwest   */
#define BENT_StoNE        0x00004000L /* south to northeast   */
#define BENT_WtoNE        0x00008000L /* west to northeast    */
#define BENT_WtoSE        0x00010000L /* west to southeast    */

/* 90 degree corner-to-adjacent-corner lines */
#define ANGLE_NEtoSE      0x00020000L /* northeast to southeast */
#define ANGLE_SEtoSW      0x00040000L /* southeast to southwest */
#define ANGLE_SWtoNW      0x00080000L /* southwest to northwest */
#define ANGLE_NWtoNE      0x00100000L /* northwest to northeast */

/* 45 degree angle side-to-near-corner lines */
#define SHARP_NtoNE       0x00200000L /* north to northeast   */
#define SHARP_EtoNE       0x00400000L /* east to northeast    */
#define SHARP_EtoSE       0x00800000L /* east to southeast    */
#define SHARP_StoSE       0x01000000L /* south to southeast   */
#define SHARP_StoSW       0x02000000L /* south to southwest   */
#define SHARP_WtoSW       0x04000000L /* west to southwest    */
#define SHARP_WtoNW       0x08000000L /* west to northwest    */
#define SHARP_NtoNW       0x10000000L /* north to northwest   */

/* directions the cell can be reached from (point to previous cell) */
#define FROM_NOWHERE      0
#define FROM_NORTH        1
#define FROM_NORTHEAST    2
#define FROM_EAST         3
#define FROM_SOUTHEAST    4
#define FROM_SOUTH        5
#define FROM_SOUTHWEST    6
#define FROM_WEST         7
#define FROM_NORTHWEST    8
#define FROM_OTHERSIDE    9
