1 files changed, 60 insertions, 0 deletions

diff --git a/old/2021-02-06/cube.h b/old/2021-02-06/cube.h
new file mode 100644
index 0000000..bc4f14b
--- /dev/null
+++ b/old/2021-02-06/cube.h
@@ -0,0 +1,60 @@
+#ifndef CUBE_H
+#define CUBE_H
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include "utils.h"
+
+#define NMOVES (z3+1)
+
+/* Constants for moves and pieces */
+typedef enum {
+  NULLMOVE,
+  U, U2, U3, D, D2, D3, R, R2, R3, L, L2, L3, F, F2, F3, B, B2, B3,
+  Uw, Uw2, Uw3, Dw, Dw2, Dw3, Rw, Rw2, Rw3,
+  Lw, Lw2, Lw3, Fw, Fw2, Fw3, Bw, Bw2, Bw3,
+  M, M2, M3, S, S2, S3, E, E2, E3,
+  x, x2, x3, y, y2, y3, z, z2, z3,
+} Move;
+typedef enum {U_center,D_center,R_center,L_center,F_center,B_center} Center;
+typedef enum { UF, UL, UB, UR, DF, DL, DB, DR, FR, FL, BL, BR } Edge;
+typedef enum { UFR, UFL, UBL, UBR, DFR, DFL, DBL, DBR } Corner;
+
+/* An alg is an array of "NissMoves", which can be on normal or on inverse. */
+typedef struct { bool inverse; Move m; } NissMove;
+
+/* Representation of the cube */
+typedef struct {
+  uint16_t eofb, eorl, eoud, coud, cofb, corl,
+           epose, eposs, eposm, cp, cpos;
+} Cube;
+
+extern bool commute[NMOVES][NMOVES];
+extern bool possible_next[NMOVES][NMOVES][NMOVES];
+extern Move inverse[NMOVES];
+/* Movesets */
+extern bool standard_moveset[NMOVES];
+
+int copy_alg(NissMove *src, NissMove *dest); /*return number of moves copied */
+
+bool equal(Cube c1, Cube c2);
+bool is_solvable(Cube cube);
+/* reorient=true allows solved in wrong orientation */
+bool is_solved(Cube cube, bool reorient);
+void print_cube(Cube cube);
+void print_moves(NissMove *alg);
+int read_moves(char *str, NissMove *alg, int n); /* reads at most n moves */
+void cleanup(NissMove *src, int n); /* rewrites using basic moves, at most n */
+Cube blank_cube();
+Cube inverse_cube(Cube cube);
+Cube move_cube(Move m, Cube cube);
+Cube compose(Cube c2, Cube c1); /* Use c2 as an alg */
+Cube apply_alg(NissMove *alg, Cube cube);
+
+void init_ttables(bool read, bool write);
+void init_aux_tables();
+
+void init_dbg();
+
+#endif