Reorganized folder structure

1 files changed, 0 insertions, 839 deletions

diff --git a/src/solve_h48.h b/src/solve_h48.h
deleted file mode 100644
index 1701268..0000000
--- a/src/solve_h48.h
+++ /dev/null
@@ -1,839 +0,0 @@
-#define MAP_UNSET             UINT64_C(0xFFFFFFFFFFFFFFFF)
-#define MAP_KEYMASK           UINT64_C(0xFFFFFFFFFF)
-#define MAP_KEYSHIFT          UINT64_C(40)
-
-#define COCSEP_CLASSES        ((size_t)3393)
-#define COCSEP_TABLESIZE      ((size_t)_3p7 << (size_t)7)
-#define COCSEP_VISITEDSIZE    ((COCSEP_TABLESIZE + (size_t)7) / (size_t)8)
-#define COCSEP_FULLSIZE       ((size_t)4 * (COCSEP_TABLESIZE + (size_t)12))
-
-#define ESEP_NOEO             (COCSEP_CLASSES * (size_t)_12c4 * (size_t)_8c4)
-#define ESEP_MAX(h)           (ESEP_NOEO << (size_t)(h))
-#define ESEP_TABLESIZE(h, k)  (ESEP_MAX((h)) / ((size_t)8 / (size_t)(k)))
-
-#define COCLASS_MASK          (UINT32_C(0xFFFF) << UINT32_C(16))
-#define COCLASS(x)            (((x) & COCLASS_MASK) >> UINT32_C(16))
-#define TTREP_MASK            (UINT32_C(0xFF) << UINT32_C(8))
-#define TTREP(x)              (((x) & TTREP_MASK) >> UINT32_C(8))
-#define CBOUND_MASK           UINT32_C(0xFF)
-#define CBOUND(x)             ((x) & CBOUND_MASK)
-#define H48_ESIZE(h)          ((_12c4 * _8c4) << (int64_t)(h))
-
-#define ESEP_IND(i)           ((uint32_t)(i) / UINT32_C(8))
-#define ESEP_SHIFT(i)         (UINT32_C(4) * ((uint32_t)(i) % UINT32_C(8)))
-#define ESEP_MASK(i)          ((_bit_u32(4) - (uint32_t)(1)) << ESEP_SHIFT(i))
-#define VISITED_IND(i)        ((uint32_t)(i) / UINT32_C(8))
-#define VISITED_MASK(i)       (UINT32_C(1) << ((uint32_t)(i) % UINT32_C(8)))
-
-#define MAX_SOLUTION_LENGTH 20
-
-/*
-TODO: This loop other similar h48 coordinates can be improved by only
-transforming edges, but we need to compose transformations (i.e. conjugate
-_t by _ttrep).
-*/
-#define _foreach_h48sim(_cube, _cocsepdata, _selfsim, _h, _action) \
-        int64_t _cocsep = coord_cocsep(_cube); \
-        uint8_t _ttrep = TTREP(_cocsepdata[_cocsep]); \
-        uint8_t _inverse_ttrep = inverse_trans(_ttrep); \
-        int64_t _coclass = COCLASS(_cocsepdata[_cocsep]); \
-        cube_t _rep = transform(_cube, _ttrep); \
-        uint64_t _sim = _selfsim[_coclass]; \
-        for (uint8_t _t = 0; _t < 48 && _sim; _t++, _sim >>= 1) { \
-                if (!(_sim & 1)) continue; \
-                _cube = transform(_rep, _t); \
-                _cube = transform(_cube, _inverse_ttrep); \
-                _action \
-        }
-
-typedef struct {
-        uint64_t n;
-        uint64_t capacity;
-        uint64_t randomizer;
-        uint64_t *table;
-} h48map_t;
-
-typedef struct {
-        uint64_t key;
-        uint64_t val;
-} kvpair_t;
-
-typedef struct {
-        cube_t cube;
-        uint8_t depth;
-        uint8_t maxdepth;
-        uint16_t *n;
-        uint32_t *buf32;
-        uint8_t *visited;
-        uint64_t *selfsim;
-        cube_t *rep;
-} dfsarg_cocsep_t;
-
-/* TODO keep or not? */
-typedef struct {
-        cube_t cube;
-        int8_t nmoves;
-        int8_t depth;
-        uint8_t moves[MAX_SOLUTION_LENGTH];
-        uint32_t *cocsepdata;
-        h48map_t *visited;
-} dfsarg_genh48set_t;
-
-typedef struct {
-        uint8_t depth;
-        uint32_t *cocsepdata;
-        uint32_t *buf32;
-        uint64_t *selfsim;
-        int64_t done;
-        cube_t *crep;
-} bfsarg_esep_t;
-
-typedef struct {
-        cube_t cube;
-        cube_t inverse;
-        int8_t nmoves;
-        int8_t depth;
-        uint8_t moves[MAX_SOLUTION_LENGTH];
-        int64_t *nsols;
-        int64_t maxsolutions;
-        uint8_t h;
-        uint32_t *cocsepdata;
-        uint32_t *h48data;
-        char **nextsol;
-} dfsarg_solveh48_t;
-
-typedef struct {
-        cube_t cube;
-        int8_t nmoves;
-        int8_t depth;
-        uint8_t moves[MAX_SOLUTION_LENGTH];
-        uint32_t *cocsepdata;
-        uint32_t *h48data;
-        char *s;
-} dfsarg_solveh48stats_t;
-
-_static void h48map_create(h48map_t *, uint64_t, uint64_t);
-_static void h48map_clear(h48map_t *);
-_static void h48map_destroy(h48map_t *);
-_static uint64_t h48map_lookup(h48map_t *, uint64_t);
-_static void h48map_insertmin(h48map_t *, uint64_t, uint64_t);
-_static uint64_t h48map_value(h48map_t *, uint64_t);
-_static kvpair_t h48map_nextkvpair(h48map_t *, uint64_t *);
-
-_static_inline int64_t coord_h48(cube_t, const uint32_t *, uint8_t);
-_static_inline int64_t coord_h48_edges(cube_t, int64_t, uint8_t, uint8_t);
-_static_inline cube_t invcoord_h48(int64_t, const cube_t *, uint8_t);
-
-_static_inline bool get_visited(const uint8_t *, int64_t);
-_static_inline void set_visited(uint8_t *, int64_t);
-_static_inline uint8_t get_esep_pval(const uint32_t *, int64_t);
-_static_inline void set_esep_pval(uint32_t *, int64_t, uint8_t);
-
-_static size_t gendata_cocsep(void *, uint64_t *, cube_t *);
-_static uint32_t gendata_cocsep_dfs(dfsarg_cocsep_t *);
-_static uint64_t gen_h48short(
-    uint8_t, const uint32_t *, const cube_t *, const uint64_t *, h48map_t *);
-_static size_t gendata_h48h0k4(void *, uint8_t);
-_static int64_t gendata_h48h0k4_bfs(bfsarg_esep_t *);
-_static int64_t gendata_h48h0k4_bfs_fromdone(bfsarg_esep_t *);
-_static int64_t gendata_h48h0k4_bfs_fromnew(bfsarg_esep_t *);
-
-_static void solve_h48_appendsolution(dfsarg_solveh48_t *);
-_static_inline int8_t get_h48_cdata(cube_t, uint32_t *, uint32_t *);
-_static_inline int8_t get_h48_bound(cube_t, uint32_t, uint8_t, uint32_t *);
-_static_inline bool solve_h48_stop(dfsarg_solveh48_t *);
-_static int64_t solve_h48_dfs(dfsarg_solveh48_t *);
-_static int64_t solve_h48(
-    cube_t, int8_t, int8_t, int8_t, uint8_t, const void *, char *);
-
-_static int64_t solve_h48stats_dfs(dfsarg_solveh48stats_t *);
-_static int64_t solve_h48stats(cube_t, int8_t, const void *, char [static 12]);
-
-_static void
-h48map_create(h48map_t *map, uint64_t capacity, uint64_t randomizer)
-{
-        map->capacity = capacity;
-        map->randomizer = randomizer;
-
-        map->table = malloc(map->capacity * sizeof(int64_t));
-        h48map_clear(map);
-}
-
-_static void
-h48map_clear(h48map_t *map)
-{
-        memset(map->table, 0xFF, map->capacity * sizeof(uint64_t));
-        map->n = 0;
-}
-
-_static void
-h48map_destroy(h48map_t *map)
-{
-        free(map->table);
-}
-
-_static_inline uint64_t
-h48map_lookup(h48map_t *map, uint64_t x)
-{
-        uint64_t hash, i;
-
-        hash = ((x % map->capacity) * map->randomizer) % map->capacity;
-        for (i = hash;
-             map->table[i] != MAP_UNSET && (map->table[i] & MAP_KEYMASK) != x;
-             i = (i+1) % map->capacity
-        ) ;
-
-        return i;
-}
-
-_static_inline void
-h48map_insertmin(h48map_t *map, uint64_t key, uint64_t val)
-{
-        uint64_t i, oldval, min;
-
-        i = h48map_lookup(map, key);
-        oldval = map->table[i] >> MAP_KEYSHIFT;
-        min = _min(val, oldval);
-
-        map->n += map->table[i] == MAP_UNSET;
-        map->table[i] = (key & MAP_KEYMASK) | (min << MAP_KEYSHIFT);
-}
-
-_static_inline uint64_t
-h48map_value(h48map_t *map, uint64_t key)
-{
-        return map->table[h48map_lookup(map, key)] >> MAP_KEYSHIFT;
-}
-
-_static kvpair_t
-h48map_nextkvpair(h48map_t *map, uint64_t *p)
-{
-        kvpair_t kv;
-        uint64_t pair;
-
-        kv.key = MAP_UNSET;
-        kv.val = MAP_UNSET;
-
-        DBG_ASSERT(*p < map->capacity, kv,
-            "Error looping over map: given index %" PRIu64 " is out of "
-            "range [0,%" PRIu64 "]", *p, map->capacity);
-
-        for ( ; *p < map->capacity; (*p)++) {
-                if (map->table[*p] != MAP_UNSET) {
-                        pair = map->table[(*p)++];
-                        kv.key = pair & MAP_KEYMASK;
-                        kv.val = pair >> MAP_KEYSHIFT;
-                        return kv;
-                }
-        }
-
-        return kv;
-}
-
-_static_inline int64_t
-coord_h48(cube_t c, const uint32_t *cocsepdata, uint8_t h)
-{
-        int64_t cocsep, coclass;
-        uint32_t data;
-        uint8_t ttrep;
-
-        DBG_ASSERT(h <= 11, -1, "coord_h48: h must be between 0 and 11\n");
-
-        cocsep = coord_cocsep(c);
-        data = cocsepdata[cocsep];
-        coclass = (int64_t)COCLASS(data);
-        ttrep = (int64_t)TTREP(data);
-
-        return coord_h48_edges(c, coclass, ttrep, h);
-}
-
-_static_inline int64_t
-coord_h48_edges(cube_t c, int64_t coclass, uint8_t ttrep, uint8_t h)
-{
-        cube_t d;
-        int64_t esep, eo, edges;
-
-        d = transform_edges(c, ttrep);
-        esep = coord_esep(d);
-        eo = coord_eo(d);
-        edges = (esep << 11) + eo;
-
-        return (coclass * H48_ESIZE(11) + edges) >> (11 - (int64_t)h);
-}
-
-/*
-This function does not necessarily return a cube whose coordinate is
-the given value, because it works up to symmetry. This means that the
-returned cube is a transformed cube of one that gives the correct value.
-*/
-_static_inline cube_t
-invcoord_h48(int64_t i, const cube_t *crep, uint8_t h)
-{
-        cube_t ret;
-        int64_t hh, coclass, ee, esep, eo;
-
-        DBG_ASSERT(h <= 11, zero,
-            "invcoord_h48: h must be between 0 and 11\n");
-
-        hh = (int64_t)h;
-        coclass = i / H48_ESIZE(h);
-        ee = i % H48_ESIZE(h);
-        esep = ee >> hh;
-        eo = (ee & ((1 << hh) - 1)) << (11 - hh);
-
-        ret = invcoord_esep(esep);
-        copy_corners(&ret, crep[coclass]);
-        set_eo(&ret, eo);
-
-        return ret;
-}
-
-/*
-Each element of the cocsep table is a uint32_t used as follows:
-  - Lowest 8-bit block: pruning value
-  - Second-lowest 8-bit block: "ttrep" (transformation to representative)
-  - Top 16-bit block: symcoord value
-After the data as described above, more auxiliary information is appended:
-  - A uint32_t representing the number of symmetry classes
-  - A uint32_t representing the highest value of the pruning table
-  - One uint32_t for each "line" of the pruning table, representing the number
-    of positions having that pruning value.
-*/
-_static size_t
-gendata_cocsep(void *buf, uint64_t *selfsim, cube_t *rep)
-{
-        uint32_t *buf32, *info, cc;
-        uint16_t n;
-        uint8_t i, j, visited[COCSEP_VISITEDSIZE];
-        dfsarg_cocsep_t arg;
-
-        if (buf == NULL)
-                goto gendata_cocsep_return_size;
-
-        buf32 = (uint32_t *)buf;
-        info = buf32 + COCSEP_TABLESIZE;
-        memset(buf32, 0xFF, sizeof(uint32_t) * COCSEP_TABLESIZE);
-        if (selfsim != NULL)
-                memset(selfsim, 0, sizeof(uint64_t) * COCSEP_CLASSES);
-
-        arg = (dfsarg_cocsep_t) {
-                .cube = solved,
-                .n = &n,
-                .buf32 = buf32,
-                .visited = visited,
-                .selfsim = selfsim,
-                .rep = rep
-        };
-        for (i = 0, n = 0, cc = 0; i < 10; i++) {
-                LOG("cocsep: generating depth %" PRIu8 "\n", i);
-                memset(visited, 0, COCSEP_VISITEDSIZE);
-                arg.depth = 0;
-                arg.maxdepth = i;
-                cc = gendata_cocsep_dfs(&arg);
-                info[i+2] = cc;
-                LOG("found %" PRIu32 "\n", cc);
-        }
-
-        info[0] = (uint32_t)n;
-        info[1] = 9; /* Known max pruning value */
-        DBG_ASSERT(n == COCSEP_CLASSES, 0,
-            "cocsep: computed %" PRIu16 " symmetry classes, "
-            "expected %zu\n", n, COCSEP_CLASSES);
-
-        LOG("cocsep data computed\n");
-        LOG("Symmetry classes: %" PRIu32 "\n", info[0]);
-        LOG("Maximum pruning value: %" PRIu32 "\n", info[1]);
-        LOG("Pruning value distribution:\n");
-        for (j = 0; j < 10; j++)
-                LOG("%" PRIu8 ":\t%" PRIu32 "\n", j, info[j+2]);
-
-gendata_cocsep_return_size:
-        return COCSEP_FULLSIZE;
-}
-
-_static uint32_t
-gendata_cocsep_dfs(dfsarg_cocsep_t *arg)
-{
-        uint8_t m;
-        uint32_t cc, class, ttrep, depth, olddepth, tinv;
-        uint64_t t;
-        int64_t i, j;
-        cube_t d;
-        dfsarg_cocsep_t nextarg;
-
-        i = coord_cocsep(arg->cube);
-        olddepth = (uint8_t)(arg->buf32[i] & 0xFF);
-        if (olddepth < arg->depth || get_visited(arg->visited, i))
-                return 0;
-        set_visited(arg->visited, i);
-
-        if (arg->depth == arg->maxdepth) {
-                if ((arg->buf32[i] & 0xFF) != 0xFF)
-                        return 0;
-
-                if (arg->rep != NULL)
-                        arg->rep[*arg->n] = arg->cube;
-                for (t = 0, cc = 0; t < 48; t++) {
-                        d = transform_corners(arg->cube, t);
-                        j = coord_cocsep(d);
-                        if (i == j && arg->selfsim != NULL)
-                                arg->selfsim[*arg->n] |= UINT64_C(1) << t;
-                        if (COCLASS(arg->buf32[j]) != UINT32_C(0xFFFF))
-                                continue;
-                        set_visited(arg->visited, j);
-                        tinv = inverse_trans(t);
-                        olddepth = arg->buf32[j] & 0xFF;
-                        cc += olddepth == 0xFF;
-
-                        class = (uint32_t)(*arg->n) << UINT32_C(16);
-                        ttrep = (uint32_t)tinv << UINT32_C(8);
-                        depth = (uint32_t)arg->depth;
-                        arg->buf32[j] = class | ttrep | depth;
-                }
-                (*arg->n)++;
-
-                return cc;
-        }
-
-        memcpy(&nextarg, arg, sizeof(dfsarg_cocsep_t));
-        nextarg.depth++;
-        for (m = 0, cc = 0; m < 18; m++) {
-                nextarg.cube = move(arg->cube, m);
-                cc += gendata_cocsep_dfs(&nextarg);
-        }
-
-        return cc;
-}
-
-_static uint64_t
-gen_h48short(
-        uint8_t n,
-        const uint32_t *cocsepdata,
-        const cube_t *crep,
-        const uint64_t *selfsim,
-        h48map_t *map
-) {
-        uint8_t i, m;
-        int64_t coord;
-        uint64_t j, oldn;
-        kvpair_t kv;
-        cube_t cube, d;
-
-        cube = solvedcube();
-        coord = coord_h48(cube, cocsepdata, 11);
-        h48map_insertmin(map, coord, 0);
-        oldn = 0;
-        LOG("Short h48: generating depth 0\nfound %" PRIu8 "\n", map->n-oldn);
-        for (i = 0; i < n; i++) {
-                LOG("Short h48: generating depth %" PRIu8 "\n", i+1);
-                j = 0;
-                oldn = map->n;
-                for (kv = h48map_nextkvpair(map, &j);
-                     j != map->capacity;
-                     kv = h48map_nextkvpair(map, &j)
-                ) {
-                        if (kv.val != i)
-                                continue;
-                        cube = invcoord_h48(kv.key, crep, 11);
-                        for (m = 0; m < 18; m++) {
-                                d = move(cube, m);
-                                _foreach_h48sim(d, cocsepdata, selfsim, 11,
-                                        coord = coord_h48(d, cocsepdata, 11);
-                                        h48map_insertmin(map, coord, i+1);
-                                )
-                        }
-                }
-                LOG("found %" PRIu8 "\n", map->n-oldn);
-        }
-
-        return map->n;
-}
-
-/*
-TODO description
-generating fixed table with h=0, k=4
-*/
-_static size_t
-gendata_h48h0k4(void *buf, uint8_t maxdepth)
-{
-        uint32_t j, *buf32, *info, *cocsepdata;
-        bfsarg_esep_t arg;
-        int64_t sc, cc, esep_max;
-        uint64_t selfsim[COCSEP_CLASSES];
-        cube_t crep[COCSEP_CLASSES];
-        size_t cocsepsize, infosize;
-
-        /* TODO: move info at start of tables (all tables!) */
-        infosize = 4 * maxdepth;
-        cocsepsize = gendata_cocsep(buf, selfsim, crep);
-        infosize = 88;
-
-        if (buf == NULL)
-                goto gendata_h48h0k4_return_size;
-
-        esep_max = (int64_t)ESEP_MAX(0);
-        cocsepdata = (uint32_t *)buf;
-        buf32 = cocsepdata + cocsepsize / 4;
-        info = buf32 + (ESEP_TABLESIZE(0, 4) / sizeof(uint32_t));
-        memset(buf32, 0xFF, ESEP_TABLESIZE(0, 4));
-
-        sc = coord_h48(solved, cocsepdata, 0);
-        set_esep_pval(buf32, sc, 0);
-        info[1] = 1;
-        arg = (bfsarg_esep_t) {
-                .cocsepdata = cocsepdata,
-                .buf32 = buf32,
-                .selfsim = selfsim,
-                .crep = crep
-        };
-        for (
-                arg.done = 1, arg.depth = 1, cc = 0;
-                arg.done < esep_max && arg.depth <= maxdepth;
-                arg.depth++
-        ) {
-                LOG("esep: generating depth %" PRIu8 "\n", arg.depth);
-                cc = gendata_h48h0k4_bfs(&arg);
-                arg.done += cc;
-                info[arg.depth+1] = cc;
-                LOG("found %" PRId64 "\n", cc);
-        }
-
-        info[0] = arg.depth-1;
-
-        LOG("h48 pruning table computed\n");
-        LOG("Maximum pruning value: %" PRIu32 "\n", info[0]);
-        LOG("Pruning value distribution:\n");
-        for (j = 0; j <= info[0]; j++)
-                LOG("%" PRIu8 ":\t%" PRIu32 "\n", j, info[j+1]);
-
-gendata_h48h0k4_return_size:
-        return cocsepsize + ESEP_TABLESIZE(0, 4) + infosize;
-}
-
-_static int64_t
-gendata_h48h0k4_bfs(bfsarg_esep_t *arg)
-{
-        const uint8_t breakpoint = 10; /* Hand-picked optimal */
-
-        if (arg->depth < breakpoint)
-                return gendata_h48h0k4_bfs_fromdone(arg);
-        else
-                return gendata_h48h0k4_bfs_fromnew(arg);
-}
-
-_static int64_t
-gendata_h48h0k4_bfs_fromdone(bfsarg_esep_t *arg)
-{
-        uint8_t c, m, x;
-        uint32_t cc;
-        int64_t i, j, k;
-        cube_t cube, moved;
-
-        for (i = 0, cc = 0; i < (int64_t)ESEP_MAX(0); i++) {
-                c = get_esep_pval(arg->buf32, i);
-                if (c != arg->depth - 1)
-                        continue;
-                cube = invcoord_h48(i, arg->crep, 0);
-                for (m = 0; m < 18; m++) {
-                        moved = move(cube, m);
-                        j = coord_h48(moved, arg->cocsepdata, 0);
-                        if (get_esep_pval(arg->buf32, j) <= arg->depth)
-                                continue;
-                        _foreach_h48sim(moved, arg->cocsepdata, arg->selfsim, 0,
-                                k = coord_h48(moved, arg->cocsepdata, 0);
-                                x = get_esep_pval(arg->buf32, k);
-                                set_esep_pval(arg->buf32, k, arg->depth);
-                                cc += x != arg->depth;
-                        )
-                }
-        }
-
-        return cc;
-}
-
-_static int64_t
-gendata_h48h0k4_bfs_fromnew(bfsarg_esep_t *arg)
-{
-        uint8_t c, m, x;
-        uint32_t cc;
-        int64_t i, j;
-        cube_t cube, moved;
-
-        for (i = 0, cc = 0; i < (int64_t)ESEP_MAX(0); i++) {
-                c = get_esep_pval(arg->buf32, i);
-                if (c != 0xF)
-                        continue;
-                cube = invcoord_h48(i, arg->crep, 0);
-                for (m = 0; m < 18; m++) {
-                        moved = move(cube, m);
-                        j = coord_h48(moved, arg->cocsepdata, 0);
-                        x = get_esep_pval(arg->buf32, j);
-                        if (x >= arg->depth)
-                                continue;
-                        _foreach_h48sim(cube, arg->cocsepdata, arg->selfsim, 0,
-                                j = coord_h48(cube, arg->cocsepdata, 0);
-                                x = get_esep_pval(arg->buf32, j);
-                                set_esep_pval(arg->buf32, j, arg->depth);
-                                cc += x == 0xF;
-                        )
-                        break; /* Enough to find one, skip the rest */
-                }
-        }
-
-        return cc;
-}
-
-_static_inline bool
-get_visited(const uint8_t *a, int64_t i)
-{
-        return a[VISITED_IND(i)] & VISITED_MASK(i);
-}
-
-_static_inline void
-set_visited(uint8_t *a, int64_t i)
-{
-        a[VISITED_IND(i)] |= VISITED_MASK(i);
-}
-
-_static_inline uint8_t
-get_esep_pval(const uint32_t *buf32, int64_t i)
-{
-        return (buf32[ESEP_IND(i)] & ESEP_MASK(i)) >> ESEP_SHIFT(i);
-}
-
-_static_inline void
-set_esep_pval(uint32_t *buf32, int64_t i, uint8_t val)
-{
-        buf32[ESEP_IND(i)] =
-            (buf32[ESEP_IND(i)] & (~ESEP_MASK(i))) | (val << ESEP_SHIFT(i));
-}
-
-_static void
-solve_h48_appendsolution(dfsarg_solveh48_t *arg)
-{
-        int strl;
-
-        strl = writemoves(arg->moves, arg->nmoves, *arg->nextsol);
-        LOG("Solution found: %s\n", *arg->nextsol);
-        *arg->nextsol += strl;
-        **arg->nextsol = '\n';
-        (*arg->nextsol)++;
-        (*arg->nsols)++;
-}
-
-_static_inline int8_t
-get_h48_cdata(cube_t cube, uint32_t *cocsepdata, uint32_t *cdata)
-{
-        int64_t coord;
-
-        coord = coord_cocsep(cube);
-        *cdata = cocsepdata[coord];
-
-        return CBOUND(*cdata);
-}
-
-_static_inline int8_t
-get_h48_bound(cube_t cube, uint32_t cdata, uint8_t h, uint32_t *h48data)
-{
-        int64_t coord;
-
-        coord = coord_h48_edges(cube, COCLASS(cdata), TTREP(cdata), h);
-        return get_esep_pval(h48data, coord);
-}
-
-_static_inline bool
-solve_h48_stop(dfsarg_solveh48_t *arg)
-{
-        uint32_t data, data_inv;
-        int8_t bound;
-
-        bound = get_h48_cdata(arg->cube, arg->cocsepdata, &data);
-        if (bound + arg->nmoves > arg->depth)
-                return true;
-
-        bound = get_h48_cdata(arg->inverse, arg->cocsepdata, &data_inv);
-        if (bound + arg->nmoves > arg->depth)
-                return true;
-
-/*
-        bound = get_h48_bound(arg->cube, data, arg->h, arg->h48data);
-LOG("Using pval %" PRId8 "\n", bound);
-        if (bound + arg->nmoves > arg->depth)
-                return true;
-
-        bound = get_h48_bound(arg->inverse, data_inv, arg->h, arg->h48data);
-        if (bound + arg->nmoves > arg->depth)
-                return true;
-*/
-
-        return false;
-}
-
-_static int64_t
-solve_h48_dfs(dfsarg_solveh48_t *arg)
-{
-        dfsarg_solveh48_t nextarg;
-        int64_t ret;
-        uint8_t m;
-
-        if (*arg->nsols == arg->maxsolutions)
-                return 0;
-
-        if (solve_h48_stop(arg))
-                return 0;
-
-        if (issolved(arg->cube)) {
-                if (arg->nmoves != arg->depth)
-                        return 0;
-                solve_h48_appendsolution(arg);
-                return 1;
-        }
-
-        /* TODO: avoid copy, change arg and undo changes after recursion */
-        nextarg = *arg;
-        nextarg.nmoves = arg->nmoves + 1;
-        ret = 0;
-        for (m = 0; m < 18; m++) {
-                nextarg.moves[arg->nmoves] = m;
-                if (!allowednextmove(nextarg.moves, nextarg.nmoves)) {
-                        /* If a move is not allowed, neither are its 180
-                         * and 270 degree variations */
-                        m += 2;
-                        continue;
-                }
-                nextarg.cube = move(arg->cube, m);
-                nextarg.inverse = inverse(nextarg.cube); /* TODO: use premove */
-                ret += solve_h48_dfs(&nextarg);
-        }
-
-        return ret;
-}
-
-_static int64_t
-solve_h48(
-        cube_t cube,
-        int8_t minmoves,
-        int8_t maxmoves,
-        int8_t maxsolutions,
-        uint8_t h,
-        const void *data,
-        char *solutions
-)
-{
-        int64_t nsols;
-        dfsarg_solveh48_t arg;
-
-        arg = (dfsarg_solveh48_t) {
-                .cube = cube,
-                .inverse = inverse(cube),
-                .nsols = &nsols,
-                .maxsolutions = maxsolutions,
-                .h = h,
-                .cocsepdata = (uint32_t *)data,
-                .h48data = ((uint32_t *)data) + COCSEP_FULLSIZE / 4,
-                .nextsol = &solutions
-        };
-
-        nsols = 0;
-        for (arg.depth = minmoves;
-             arg.depth <= maxmoves && nsols < maxsolutions;
-             arg.depth++)
-        {
-                LOG("Found %" PRId64 " solutions, searching at depth %"
-                    PRId8 "\n", nsols, arg.depth);
-                arg.nmoves = 0;
-                solve_h48_dfs(&arg);
-        }
-
-        return nsols;
-}
-
-/*
-The h48stats solver computes how many moves it takes to solve to
-each of the 12 h48 coordinates, one for each value of h from 0 to 11.
-The solutions array is filled with the length of the solutions. The
-solution array is therefore not a printable string.
-*/
-_static int64_t
-solve_h48stats_dfs(dfsarg_solveh48stats_t *arg)
-{
-        const int64_t limit = 11;
-
-        int8_t bound, u;
-        uint8_t m;
-        uint32_t d;
-        int64_t coord, h;
-        dfsarg_solveh48stats_t nextarg;
-
-        /* Check cocsep lower bound (corners only) */
-        bound = get_h48_cdata(arg->cube, arg->cocsepdata, &d);
-        if (bound + arg->nmoves > arg->depth)
-                return 0;
-
-        /* Check h48 lower bound for h=0 (esep, but no eo) */
-        coord = coord_h48_edges(arg->cube, COCLASS(d), TTREP(d), 0);
-        bound = get_esep_pval(arg->h48data, coord);
-        if (bound + arg->nmoves > arg->depth)
-                return 0;
-        
-        /* Update all other values, if solved */
-        coord = coord_h48_edges(arg->cube, COCLASS(d), TTREP(d), 11);
-        for (h = 0; h <= limit; h++) {
-                u = coord >> (11-h) == 0 && arg->s[h] == 99;
-                arg->s[h] = u * arg->nmoves + (1-u) * arg->s[h];
-        }
-
-        if (arg->s[limit] != 99)
-                return 0;
-
-        nextarg = *arg;
-        nextarg.nmoves = arg->nmoves + 1;
-        for (m = 0; m < 18; m++) {
-                nextarg.moves[arg->nmoves] = m;
-                if (!allowednextmove(nextarg.moves, nextarg.nmoves)) {
-                        /* If a move is not allowed, neither are its 180
-                         * and 270 degree variations */
-                        m += 2;
-                        continue;
-                }
-                nextarg.cube = move(arg->cube, m);
-                solve_h48stats_dfs(&nextarg);
-        }
-
-        return 0;
-}
-
-_static int64_t
-solve_h48stats(
-        cube_t cube,
-        int8_t maxmoves,
-        const void *data,
-        char solutions[static 12]
-)
-{
-        int i;
-        size_t cocsepsize;
-        dfsarg_solveh48stats_t arg;
-
-        cocsepsize = gendata_cocsep(NULL, NULL, NULL);
-
-        arg = (dfsarg_solveh48stats_t) {
-                .cube = cube,
-                .cocsepdata = (uint32_t *)data,
-                .h48data = ((uint32_t *)data) + (cocsepsize/4),
-                .s = solutions
-        };
-
-        for (i = 0; i < 12; i++)
-                solutions[i] = (char)99;
-
-        for (arg.depth = 0;
-             arg.depth <= maxmoves && solutions[11] == 99;
-             arg.depth++)
-        {
-                arg.nmoves = 0;
-                solve_h48stats_dfs(&arg);
-        }
-
-        return 0;
-}