#include "xf.h"

#define LOC_ARGS int ix __attribute__((__unused__)),	\
		 int iy __attribute__((__unused__)),	\
		 int sx __attribute__((__unused__)),	\
		 int sy __attribute__((__unused__))

#define SIZE_ARGS int x __attribute__((__unused__)),	\
		  int y __attribute__((__unused__))

static int xf_loc__x(LOC_ARGS) { return(ix); }
static int xf_loc__y(LOC_ARGS) { return(iy); }
static int xf_loc_nx(LOC_ARGS) { return(sx-1-ix); }
static int xf_loc_ny(LOC_ARGS) { return(sy-1-iy); }
static int xf_sx(SIZE_ARGS) { return(x); }
static int xf_sy(SIZE_ARGS) { return(y); }

#undef LOC_ARGS
#undef SIZE_ARGS

const XF xfs[8]
 = { [XF_NIL] = { XF_NIL, &xf_sx, &xf_sy, &xf_loc__x, &xf_loc__y },
     [XF_R_CW] = { XF_R_CW, &xf_sy, &xf_sx, &xf_loc__y, &xf_loc_nx },
     [XF_R_CCW] = { XF_R_CCW, &xf_sy, &xf_sx, &xf_loc_ny, &xf_loc__x },
     [XF_R_180] = { XF_R_180, &xf_sx, &xf_sy, &xf_loc_nx, &xf_loc_ny },
     [XF_MIRROR_Y] = { XF_MIRROR_Y, &xf_sx, &xf_sy, &xf_loc__x, &xf_loc_ny },
     [XF_MIRROR_X] = { XF_MIRROR_X, &xf_sx, &xf_sy, &xf_loc_nx, &xf_loc__y },
     [XF_MIRROR_XY] = { XF_MIRROR_XY, &xf_sy, &xf_sx, &xf_loc__y, &xf_loc__x },
     [XF_MIRROR_XMY] = { XF_MIRROR_XMY, &xf_sy, &xf_sx, &xf_loc_ny, &xf_loc_nx } };

const int xfcompose[8][8]
 = { [XF_NIL]
      = { [XF_NIL] = XF_NIL,
	  [XF_R_CW] = XF_R_CW,
	  [XF_R_CCW] = XF_R_CCW,
	  [XF_R_180] = XF_R_180,
	  [XF_MIRROR_X] = XF_MIRROR_X,
	  [XF_MIRROR_Y] = XF_MIRROR_Y,
	  [XF_MIRROR_XY] = XF_MIRROR_XY,
	  [XF_MIRROR_XMY] = XF_MIRROR_XMY },
     [XF_R_CW]
      = { [XF_NIL] = XF_R_CW,
	  [XF_R_CW] = XF_R_180,
	  [XF_R_CCW] = XF_NIL,
	  [XF_R_180] = XF_R_CCW,
	  [XF_MIRROR_X] = XF_MIRROR_XY,
	  [XF_MIRROR_Y] = XF_MIRROR_XMY,
	  [XF_MIRROR_XY] = XF_MIRROR_Y,
	  [XF_MIRROR_XMY] = XF_MIRROR_X },
     [XF_R_CCW]
      = { [XF_NIL] = XF_R_CCW,
	  [XF_R_CW] = XF_NIL,
	  [XF_R_CCW] = XF_R_180,
	  [XF_R_180] = XF_R_CW,
	  [XF_MIRROR_X] = XF_MIRROR_XMY,
	  [XF_MIRROR_Y] = XF_MIRROR_XY,
	  [XF_MIRROR_XY] = XF_MIRROR_X,
	  [XF_MIRROR_XMY] = XF_MIRROR_Y },
     [XF_R_180]
      = { [XF_NIL] = XF_R_180,
	  [XF_R_CW] = XF_R_CCW,
	  [XF_R_CCW] = XF_R_CW,
	  [XF_R_180] = XF_NIL,
	  [XF_MIRROR_X] = XF_MIRROR_Y,
	  [XF_MIRROR_Y] = XF_MIRROR_X,
	  [XF_MIRROR_XY] = XF_MIRROR_XMY,
	  [XF_MIRROR_XMY] = XF_MIRROR_XY },
     [XF_MIRROR_X]
      = { [XF_NIL] = XF_MIRROR_X,
	  [XF_R_CW] = XF_MIRROR_XMY,
	  [XF_R_CCW] = XF_MIRROR_XY,
	  [XF_R_180] = XF_MIRROR_Y,
	  [XF_MIRROR_X] = XF_NIL,
	  [XF_MIRROR_Y] = XF_R_180,
	  [XF_MIRROR_XY] = XF_R_CCW,
	  [XF_MIRROR_XMY] = XF_R_CW },
     [XF_MIRROR_Y]
      = { [XF_NIL] = XF_MIRROR_Y,
	  [XF_R_CW] = XF_MIRROR_XY,
	  [XF_R_CCW] = XF_MIRROR_XMY,
	  [XF_R_180] = XF_MIRROR_X,
	  [XF_MIRROR_X] = XF_R_180,
	  [XF_MIRROR_Y] = XF_NIL,
	  [XF_MIRROR_XY] = XF_R_CW,
	  [XF_MIRROR_XMY] = XF_R_CCW },
     [XF_MIRROR_XY]
      = { [XF_NIL] = XF_MIRROR_XY,
	  [XF_R_CW] = XF_MIRROR_X,
	  [XF_R_CCW] = XF_MIRROR_Y,
	  [XF_R_180] = XF_MIRROR_XMY,
	  [XF_MIRROR_X] = XF_R_CW,
	  [XF_MIRROR_Y] = XF_R_CCW,
	  [XF_MIRROR_XY] = XF_NIL,
	  [XF_MIRROR_XMY] = XF_R_180 },
     [XF_MIRROR_XMY]
      = { [XF_NIL] = XF_MIRROR_XMY,
	  [XF_R_CW] = XF_MIRROR_Y,
	  [XF_R_CCW] = XF_MIRROR_X,
	  [XF_R_180] = XF_MIRROR_XY,
	  [XF_MIRROR_X] = XF_R_CCW,
	  [XF_MIRROR_Y] = XF_R_CW,
	  [XF_MIRROR_XY] = XF_R_180,
	  [XF_MIRROR_XMY] = XF_NIL } };