summaryrefslogtreecommitdiff
path: root/vere/pkg/noun/hashtable.c
diff options
context:
space:
mode:
Diffstat (limited to 'vere/pkg/noun/hashtable.c')
-rw-r--r--vere/pkg/noun/hashtable.c1408
1 files changed, 1408 insertions, 0 deletions
diff --git a/vere/pkg/noun/hashtable.c b/vere/pkg/noun/hashtable.c
new file mode 100644
index 0000000..6b1fb39
--- /dev/null
+++ b/vere/pkg/noun/hashtable.c
@@ -0,0 +1,1408 @@
+/// @file
+
+#include "hashtable.h"
+
+#include "allocate.h"
+#include "imprison.h"
+#include "retrieve.h"
+#include "xtract.h"
+
+/* CUT_END(): extract [b_w] low bits from [a_w]
+*/
+#define CUT_END(a_w, b_w) ((a_w) & (((c3_w)1 << (b_w)) - 1))
+
+/* BIT_SET(): [1] if bit [b_w] is set in [a_w]
+*/
+#define BIT_SET(a_w, b_w) ((a_w) & ((c3_w)1 << (b_w)))
+
+static u3_weak
+_ch_trim_slot(u3h_root* har_u, u3h_slot *sot_w, c3_w lef_w, c3_w rem_w);
+
+static u3_weak
+_ch_trim_root(u3h_root* har_u);
+
+c3_w
+_ch_skip_slot(c3_w mug_w, c3_w lef_w);
+
+/* u3h_new_cache(): create hashtable with bounded size.
+*/
+u3p(u3h_root)
+u3h_new_cache(c3_w max_w)
+{
+ u3h_root* har_u = u3a_walloc(c3_wiseof(u3h_root));
+ u3p(u3h_root) har_p = u3of(u3h_root, har_u);
+ c3_w i_w;
+
+ har_u->max_w = max_w;
+ har_u->use_w = 0;
+ har_u->arm_u.mug_w = 0;
+ har_u->arm_u.inx_w = 0;
+
+ for ( i_w = 0; i_w < 64; i_w++ ) {
+ har_u->sot_w[i_w] = 0;
+ }
+ return har_p;
+}
+
+/* u3h_new(): create hashtable.
+*/
+u3p(u3h_root)
+u3h_new(void)
+{
+ return u3h_new_cache(0);
+}
+
+/* _ch_popcount(): number of bits set in word. A standard intrinsic.
+*/
+static c3_w
+_ch_popcount(c3_w num_w)
+{
+ return c3_pc_w(num_w);
+}
+
+/* _ch_buck_new(): create new bucket.
+*/
+static u3h_buck*
+_ch_buck_new(c3_w len_w)
+{
+ u3h_buck* hab_u = u3a_walloc(c3_wiseof(u3h_buck) +
+ (len_w * c3_wiseof(u3h_slot)));
+ hab_u->len_w = len_w;
+ return hab_u;
+}
+
+/* _ch_node_new(): create new node.
+*/
+static u3h_node*
+_ch_node_new(c3_w len_w)
+{
+ u3h_node* han_u = u3a_walloc(c3_wiseof(u3h_node) +
+ (len_w * c3_wiseof(u3h_slot)));
+ han_u->map_w = 0;
+ return han_u;
+}
+
+static void _ch_slot_put(u3h_slot*, u3_noun, c3_w, c3_w, c3_w*);
+
+/* _ch_node_add(): add to node.
+*/
+static u3h_node*
+_ch_node_add(u3h_node* han_u, c3_w lef_w, c3_w rem_w, u3_noun kev, c3_w *use_w)
+{
+ c3_w bit_w, inx_w, map_w, i_w;
+
+ lef_w -= 5;
+ bit_w = (rem_w >> lef_w);
+ rem_w = CUT_END(rem_w, lef_w);
+ map_w = han_u->map_w;
+ inx_w = _ch_popcount(CUT_END(map_w, bit_w));
+
+ if ( BIT_SET(map_w, bit_w) ) {
+ _ch_slot_put(&(han_u->sot_w[inx_w]), kev, lef_w, rem_w, use_w);
+ return han_u;
+ }
+ else {
+ // nothing was at this slot.
+ // Optimize: use u3a_wealloc.
+ //
+ c3_w len_w = _ch_popcount(map_w);
+ u3h_node* nah_u = _ch_node_new(1 + len_w);
+ nah_u->map_w = han_u->map_w | ((c3_w)1 << bit_w);
+
+ for ( i_w = 0; i_w < inx_w; i_w++ ) {
+ nah_u->sot_w[i_w] = han_u->sot_w[i_w];
+ }
+ nah_u->sot_w[inx_w] = u3h_noun_be_warm(u3h_noun_to_slot(kev));
+ for ( i_w = inx_w; i_w < len_w; i_w++ ) {
+ nah_u->sot_w[i_w + 1] = han_u->sot_w[i_w];
+ }
+
+ u3a_wfree(han_u);
+ *use_w += 1;
+ return nah_u;
+ }
+}
+
+/* ch_buck_add(): add to bucket.
+*/
+static u3h_buck*
+_ch_buck_add(u3h_buck* hab_u, u3_noun kev, c3_w *use_w)
+{
+ c3_w i_w;
+
+ // if our key is equal to any of the existing keys in the bucket,
+ // then replace that key-value pair with kev.
+ //
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ u3_noun kov = u3h_slot_to_noun(hab_u->sot_w[i_w]);
+ if ( c3y == u3r_sing(u3h(kev), u3h(kov)) ) {
+ hab_u->sot_w[i_w] = u3h_noun_to_slot(kev);
+ u3z(kov);
+ return hab_u;
+ }
+ }
+
+ // create mutant bucket with added key-value pair.
+ // Optimize: use u3a_wealloc().
+ {
+ u3h_buck* bah_u = _ch_buck_new(1 + hab_u->len_w);
+ bah_u->sot_w[0] = u3h_noun_be_warm(u3h_noun_to_slot(kev));
+
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ bah_u->sot_w[i_w + 1] = hab_u->sot_w[i_w];
+ }
+
+ u3a_wfree(hab_u);
+ *use_w += 1;
+ return bah_u;
+ }
+}
+
+/* _ch_some_add(): add to node or bucket.
+*/
+static void*
+_ch_some_add(void* han_v, c3_w lef_w, c3_w rem_w, u3_noun kev, c3_w *use_w)
+{
+ if ( 0 == lef_w ) {
+ return _ch_buck_add((u3h_buck*)han_v, kev, use_w);
+ }
+ else return _ch_node_add((u3h_node*)han_v, lef_w, rem_w, kev, use_w);
+}
+
+/* _ch_two(): create a new node with two leaves underneath
+*/
+u3h_slot
+_ch_two(u3h_slot had_w, u3h_slot add_w, c3_w lef_w, c3_w ham_w, c3_w mad_w)
+{
+ void* ret;
+
+ if ( 0 == lef_w ) {
+ u3h_buck* hab_u = _ch_buck_new(2);
+ ret = hab_u;
+ hab_u->sot_w[0] = had_w;
+ hab_u->sot_w[1] = add_w;
+ }
+ else {
+ c3_w hop_w, tad_w;
+ lef_w -= 5;
+ hop_w = ham_w >> lef_w;
+ tad_w = mad_w >> lef_w;
+ if ( hop_w == tad_w ) {
+ // fragments collide: store in a child node.
+ u3h_node* han_u = _ch_node_new(1);
+ ret = han_u;
+ han_u->map_w = (c3_w)1 << hop_w;
+ ham_w = CUT_END(ham_w, lef_w);
+ mad_w = CUT_END(mad_w, lef_w);
+ han_u->sot_w[0] = _ch_two(had_w, add_w, lef_w, ham_w, mad_w);
+ }
+ else {
+ u3h_node* han_u = _ch_node_new(2);
+ ret = han_u;
+ han_u->map_w = ((c3_w)1 << hop_w) | ((c3_w)1 << tad_w);
+ // smaller mug fragments go in earlier slots
+ if ( hop_w < tad_w ) {
+ han_u->sot_w[0] = had_w;
+ han_u->sot_w[1] = add_w;
+ }
+ else {
+ han_u->sot_w[0] = add_w;
+ han_u->sot_w[1] = had_w;
+ }
+ }
+ }
+
+ return u3h_node_to_slot(ret);
+}
+
+/* _ch_slot_put(): store a key-value pair in a non-null slot
+*/
+static void
+_ch_slot_put(u3h_slot* sot_w, u3_noun kev, c3_w lef_w, c3_w rem_w, c3_w* use_w)
+{
+ if ( c3n == u3h_slot_is_noun(*sot_w) ) {
+ void* hav_v = _ch_some_add(u3h_slot_to_node(*sot_w),
+ lef_w,
+ rem_w,
+ kev,
+ use_w);
+
+ u3_assert( c3y == u3h_slot_is_node(*sot_w) );
+ *sot_w = u3h_node_to_slot(hav_v);
+ }
+ else {
+ u3_noun kov = u3h_slot_to_noun(*sot_w);
+ u3h_slot add_w = u3h_noun_be_warm(u3h_noun_to_slot(kev));
+ if ( c3y == u3r_sing(u3h(kev), u3h(kov)) ) {
+ // replace old value
+ u3z(kov);
+ *sot_w = add_w;
+ }
+ else {
+ c3_w ham_w = CUT_END(u3r_mug(u3h(kov)), lef_w);
+ *sot_w = _ch_two(*sot_w, add_w, lef_w, ham_w, rem_w);
+ *use_w += 1;
+ }
+ }
+}
+
+/* u3h_put_get(): insert in caching hashtable, returning deleted key-value pair
+**
+** `key` is RETAINED; `val` is transferred.
+*/
+u3_weak
+u3h_put_get(u3p(u3h_root) har_p, u3_noun key, u3_noun val)
+{
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ u3_noun kev = u3nc(u3k(key), val);
+ c3_w mug_w = u3r_mug(key);
+ c3_w inx_w = (mug_w >> 25); // 6 bits
+ c3_w rem_w = CUT_END(mug_w, 25);
+ u3h_slot* sot_w = &(har_u->sot_w[inx_w]);
+
+ if ( c3y == u3h_slot_is_null(*sot_w) ) {
+ *sot_w = u3h_noun_be_warm(u3h_noun_to_slot(kev));
+ har_u->use_w += 1;
+ }
+ else {
+ _ch_slot_put(sot_w, kev, 25, rem_w, &(har_u->use_w));
+ }
+
+ {
+ u3_weak ret = u3_none;
+
+ if ( har_u->max_w && (har_u->use_w > har_u->max_w) ) {
+ do {
+ ret = _ch_trim_root(har_u);
+ }
+ while ( u3_none == ret );
+ har_u->use_w -= 1;
+ }
+
+ return ret;
+ }
+}
+
+/* u3h_put(): insert in hashtable.
+**
+** `key` is RETAINED; `val` is transferred.
+*/
+void
+u3h_put(u3p(u3h_root) har_p, u3_noun key, u3_noun val)
+{
+ u3_weak del = u3h_put_get(har_p, key, val);
+ if ( u3_none != del ) {
+ u3z(del);
+ }
+}
+
+/* _ch_buck_del(): delete from bucket
+*/
+static c3_o
+_ch_buck_del(u3h_slot* sot_w, u3_noun key)
+{
+ u3h_buck* hab_u = u3h_slot_to_node(*sot_w);
+ c3_w fin_w = hab_u->len_w;
+ c3_w i_w;
+ //
+ // find index of key to be deleted
+ //
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ u3_noun kov = u3h_slot_to_noun(hab_u->sot_w[i_w]);
+ if ( c3y == u3r_sing(key, u3h(kov)) ) {
+ fin_w = i_w;
+ u3z(kov);
+ break;
+ }
+ }
+
+ // no key found, no-op
+ if ( fin_w == hab_u->len_w ) {
+ return c3n;
+ }
+
+ {
+ hab_u->len_w--;
+ // u3_assert(c3y == u3h_slot_is_noun(hab_u->sot_w[fin_w]));
+ for ( i_w = fin_w; i_w < hab_u->len_w; i_w++ ) {
+ hab_u->sot_w[i_w] = hab_u->sot_w[i_w + 1];
+ }
+
+ return c3y;
+ }
+}
+
+static c3_o _ch_some_del(u3h_slot*, u3_noun, c3_w, c3_w);
+
+/* _ch_slot_del(): delete from slot
+*/
+static c3_o
+_ch_slot_del(u3h_slot* sot_w, u3_noun key, c3_w lef_w, c3_w rem_w)
+{
+ if ( c3y == u3h_slot_is_noun(*sot_w) ) {
+ u3_noun kev = u3h_slot_to_noun(*sot_w);
+ *sot_w = 0;
+ u3z(kev);
+ return c3y;
+ }
+ else {
+ return _ch_some_del(sot_w, key, lef_w, rem_w);
+ }
+}
+
+/* _ch_slot_del(): delete from node
+*/
+static c3_o
+_ch_node_del(u3h_slot* sot_w, u3_noun key, c3_w lef_w, c3_w rem_w)
+{
+ u3h_node* han_u = (u3h_node*) u3h_slot_to_node(*sot_w);
+ u3h_slot* tos_w;
+
+ c3_w bit_w, inx_w, map_w, i_w;
+
+ lef_w -= 5;
+ bit_w = (rem_w >> lef_w);
+ rem_w = CUT_END(rem_w, lef_w);
+ map_w = han_u->map_w;
+ inx_w = _ch_popcount(CUT_END(map_w, bit_w));
+
+ tos_w = &(han_u->sot_w[inx_w]);
+
+ // nothing at slot, no-op
+ if ( !BIT_SET(map_w, bit_w) ) {
+ return c3n;
+ }
+
+ if ( c3n == _ch_slot_del(tos_w, key, lef_w, rem_w) ) {
+ // nothing deleted
+ return c3n;
+ }
+ else if ( 0 != *tos_w ) {
+ // something deleted, but slot still has value
+ return c3y;
+ }
+ else {
+ // shrink!
+ c3_w i_w, ken_w, len_w = _ch_popcount(map_w);
+ u3h_slot kes_w;
+
+ if ( 2 == len_w && ((ken_w = (0 == inx_w) ? 1 : 0),
+ (kes_w = han_u->sot_w[ken_w]),
+ (c3y == u3h_slot_is_noun(kes_w))) )
+ {
+ // only one side left, and the other is a noun. debucketize.
+ *sot_w = kes_w;
+ u3a_wfree(han_u);
+ }
+ else {
+ // shrink node in place; don't reallocate, we could be low on memory
+ //
+ han_u->map_w &= ~(1 << bit_w);
+ --len_w;
+
+ for ( i_w = inx_w; i_w < len_w; i_w++ ) {
+ han_u->sot_w[i_w] = han_u->sot_w[i_w + 1];
+ }
+ }
+ return c3y;
+ }
+}
+
+/* _ch_some_del(): delete from node or buck
+*/
+static c3_o
+_ch_some_del(u3h_slot* sot_w, u3_noun key, c3_w lef_w, c3_w rem_w)
+{
+ if ( 0 == lef_w ) {
+ return _ch_buck_del(sot_w, key);
+ }
+
+ return _ch_node_del(sot_w, key, lef_w, rem_w);
+}
+
+/* u3h_del(); delete from hashtable.
+*/
+void
+u3h_del(u3p(u3h_root) har_p, u3_noun key)
+{
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ c3_w mug_w = u3r_mug(key);
+ c3_w inx_w = (mug_w >> 25);
+ c3_w rem_w = CUT_END(mug_w, 25);
+ u3h_slot* sot_w = &(har_u->sot_w[inx_w]);
+
+ if ( (c3n == u3h_slot_is_null(*sot_w))
+ && (c3y == _ch_slot_del(sot_w, key, 25, rem_w)) )
+ {
+ har_u->use_w--;
+ }
+}
+
+/* _ch_uni_with(): key/value callback, put into [*wit]
+*/
+static void
+_ch_uni_with(u3_noun kev, void* wit)
+{
+ u3p(u3h_root) har_p = *(u3p(u3h_root)*)wit;
+ u3_noun key, val;
+ u3x_cell(kev, &key, &val);
+
+ u3h_put(har_p, key, u3k(val));
+}
+
+/* u3h_uni(): unify hashtables, copying [rah_p] into [har_p]
+*/
+void
+u3h_uni(u3p(u3h_root) har_p, u3p(u3h_root) rah_p)
+{
+ u3h_walk_with(rah_p, _ch_uni_with, &har_p);
+}
+
+/* _ch_trim_node(): trim one entry from a node slot or its children
+*/
+static u3_weak
+_ch_trim_node(u3h_root* har_u, u3h_slot* sot_w, c3_w lef_w, c3_w rem_w)
+{
+ c3_w bit_w, map_w, inx_w;
+ u3h_slot* tos_w;
+ u3h_node* han_u = (u3h_node*) u3h_slot_to_node(*sot_w);
+
+ lef_w -= 5;
+ bit_w = (rem_w >> lef_w);
+ map_w = han_u->map_w;
+
+ if ( !BIT_SET(map_w, bit_w) ) {
+ har_u->arm_u.mug_w = _ch_skip_slot(har_u->arm_u.mug_w, lef_w);
+ return c3n;
+ }
+
+ rem_w = CUT_END(rem_w, lef_w);
+ inx_w = _ch_popcount(CUT_END(map_w, bit_w));
+ tos_w = &(han_u->sot_w[inx_w]);
+
+ u3_weak ret = _ch_trim_slot(har_u, tos_w, lef_w, rem_w);
+ if ( (u3_none != ret) && (0 == *tos_w) ) {
+ // shrink!
+ c3_w i_w, ken_w, len_w = _ch_popcount(map_w);
+ u3h_slot kes_w;
+
+ if ( 2 == len_w && ((ken_w = (0 == inx_w) ? 1 : 0),
+ (kes_w = han_u->sot_w[ken_w]),
+ (c3y == u3h_slot_is_noun(kes_w))) ) {
+ // only one side left, and the other is a noun. debucketize.
+ *sot_w = kes_w;
+ u3a_wfree(han_u);
+ }
+ else {
+ // shrink node in place; don't reallocate, we could be low on memory
+ //
+ han_u->map_w &= ~(1 << bit_w);
+ --len_w;
+
+ for ( i_w = inx_w; i_w < len_w; i_w++ ) {
+ han_u->sot_w[i_w] = han_u->sot_w[i_w + 1];
+ }
+ }
+ }
+ return ret;
+}
+
+/* _ch_trim_kev(): trim a single entry slot
+*/
+static u3_weak
+_ch_trim_kev(u3h_slot *sot_w)
+{
+ if ( _(u3h_slot_is_warm(*sot_w)) ) {
+ *sot_w = u3h_noun_be_cold(*sot_w);
+ return u3_none;
+ }
+ else {
+ u3_noun kev = u3h_slot_to_noun(*sot_w);
+ *sot_w = 0;
+ return kev;
+ }
+}
+
+/* _ch_trim_node(): trim one entry from a bucket slot
+*/
+static u3_weak
+_ch_trim_buck(u3h_root* har_u, u3h_slot* sot_w)
+{
+ c3_w i_w, len_w;
+ u3h_buck* hab_u = u3h_slot_to_node(*sot_w);
+
+ for ( len_w = hab_u->len_w;
+ har_u->arm_u.inx_w < len_w;
+ har_u->arm_u.inx_w += 1 )
+ {
+ u3_weak ret = _ch_trim_kev(&(hab_u->sot_w[har_u->arm_u.inx_w]));
+ if ( u3_none != ret ) {
+ if ( 2 == len_w ) {
+ // 2 things in bucket: debucketize to key-value pair, the next
+ // run will point at this pair (same mug_w, no longer in bucket)
+ *sot_w = hab_u->sot_w[ (0 == har_u->arm_u.inx_w) ? 1 : 0 ];
+ u3a_wfree(hab_u);
+ har_u->arm_u.inx_w = 0;
+ }
+ else {
+ // shrink bucket in place; don't reallocate, we could be low on memory
+ hab_u->len_w = --len_w;
+
+ for ( i_w = har_u->arm_u.inx_w; i_w < len_w; ++i_w ) {
+ hab_u->sot_w[i_w] = hab_u->sot_w[i_w + 1];
+ }
+ // leave the arm pointing at the next index in the bucket
+ ++(har_u->arm_u.inx_w);
+ }
+ return ret;
+ }
+ }
+
+ har_u->arm_u.mug_w = (har_u->arm_u.mug_w + 1) & 0x7FFFFFFF; // modulo 2^31
+ har_u->arm_u.inx_w = 0;
+ return u3_none;
+}
+
+/* _ch_trim_some(): trim one entry from a bucket or node slot
+*/
+static u3_weak
+_ch_trim_some(u3h_root* har_u, u3h_slot* sot_w, c3_w lef_w, c3_w rem_w)
+{
+ if ( 0 == lef_w ) {
+ return _ch_trim_buck(har_u, sot_w);
+ }
+ else {
+ return _ch_trim_node(har_u, sot_w, lef_w, rem_w);
+ }
+}
+
+/* _ch_skip_slot(): increment arm over hash prefix.
+*/
+c3_w
+_ch_skip_slot(c3_w mug_w, c3_w lef_w)
+{
+ c3_w hig_w = mug_w >> lef_w;
+ c3_w new_w = CUT_END(hig_w + 1, (31 - lef_w)); // modulo 2^(31 - lef_w)
+ return new_w << lef_w;
+}
+
+/* _ch_trim_slot(): trim one entry from a non-bucket slot
+*/
+static u3_weak
+_ch_trim_slot(u3h_root* har_u, u3h_slot *sot_w, c3_w lef_w, c3_w rem_w)
+{
+ if ( c3y == u3h_slot_is_noun(*sot_w) ) {
+ har_u->arm_u.mug_w = _ch_skip_slot(har_u->arm_u.mug_w, lef_w);
+ return _ch_trim_kev(sot_w);
+ }
+ else {
+ return _ch_trim_some(har_u, sot_w, lef_w, rem_w);
+ }
+}
+
+/* _ch_trim_root(): trim one entry from a hashtable
+*/
+static u3_weak
+_ch_trim_root(u3h_root* har_u)
+{
+ c3_w mug_w = har_u->arm_u.mug_w;
+ c3_w inx_w = mug_w >> 25; // 6 bits
+ u3h_slot* sot_w = &(har_u->sot_w[inx_w]);
+
+ if ( c3y == u3h_slot_is_null(*sot_w) ) {
+ har_u->arm_u.mug_w = _ch_skip_slot(har_u->arm_u.mug_w, 25);
+ return u3_none;
+ }
+
+ return _ch_trim_slot(har_u, sot_w, 25, CUT_END(mug_w, 25));
+}
+
+/* u3h_trim_to(): trim to n key-value pairs
+*/
+void
+u3h_trim_to(u3p(u3h_root) har_p, c3_w n_w)
+{
+ u3h_trim_with(har_p, n_w, u3a_lose);
+}
+
+/* u3h_trim_to(): trim to n key-value pairs
+*/
+void
+u3h_trim_with(u3p(u3h_root) har_p, c3_w n_w, void (*del_cb)(u3_noun))
+{
+ u3h_root* har_u = u3to(u3h_root, har_p);
+
+ while ( har_u->use_w > n_w ) {
+ u3_weak del = _ch_trim_root(har_u);
+ if ( u3_none != del ) {
+ har_u->use_w -= 1;
+ del_cb(del);
+ }
+ }
+}
+
+/* _ch_buck_hum(): read in bucket.
+*/
+static c3_o
+_ch_buck_hum(u3h_buck* hab_u, c3_w mug_w)
+{
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ if ( mug_w == u3r_mug(u3h(u3h_slot_to_noun(hab_u->sot_w[i_w]))) ) {
+ return c3y;
+ }
+ }
+ return c3n;
+}
+
+/* _ch_node_hum(): read in node.
+*/
+static c3_o
+_ch_node_hum(u3h_node* han_u, c3_w lef_w, c3_w rem_w, c3_w mug_w)
+{
+ c3_w bit_w, map_w;
+
+ lef_w -= 5;
+ bit_w = (rem_w >> lef_w);
+ rem_w = CUT_END(rem_w, lef_w);
+ map_w = han_u->map_w;
+
+ if ( !BIT_SET(map_w, bit_w) ) {
+ return c3n;
+ }
+ else {
+ c3_w inx_w = _ch_popcount(CUT_END(map_w, bit_w));
+ c3_w sot_w = han_u->sot_w[inx_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ if ( mug_w == u3r_mug(u3h(kev)) ) {
+ return c3y;
+ }
+ else {
+ return c3n;
+ }
+ }
+ else {
+ void* hav_v = u3h_slot_to_node(sot_w);
+
+ if ( 0 == lef_w ) {
+ return _ch_buck_hum(hav_v, mug_w);
+ }
+ else return _ch_node_hum(hav_v, lef_w, rem_w, mug_w);
+ }
+ }
+}
+
+/* u3h_hum(): check presence in hashtable.
+**
+** `key` is RETAINED.
+*/
+c3_o
+u3h_hum(u3p(u3h_root) har_p, c3_w mug_w)
+{
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ c3_w inx_w = (mug_w >> 25);
+ c3_w rem_w = CUT_END(mug_w, 25);
+ c3_w sot_w = har_u->sot_w[inx_w];
+
+ if ( _(u3h_slot_is_null(sot_w)) ) {
+ return c3n;
+ }
+ else if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ if ( mug_w == u3r_mug(u3h(kev)) ) {
+ return c3y;
+ }
+ else {
+ return c3n;
+ }
+ }
+ else {
+ u3h_node* han_u = u3h_slot_to_node(sot_w);
+
+ return _ch_node_hum(han_u, 25, rem_w, mug_w);
+ }
+}
+
+/* _ch_buck_git(): read in bucket.
+*/
+static u3_weak
+_ch_buck_git(u3h_buck* hab_u, u3_noun key)
+{
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ u3_noun kev = u3h_slot_to_noun(hab_u->sot_w[i_w]);
+ if ( _(u3r_sing(key, u3h(kev))) ) {
+ return u3t(kev);
+ }
+ }
+ return u3_none;
+}
+
+/* _ch_node_git(): read in node.
+*/
+static u3_weak
+_ch_node_git(u3h_node* han_u, c3_w lef_w, c3_w rem_w, u3_noun key)
+{
+ c3_w bit_w, map_w;
+
+ lef_w -= 5;
+ bit_w = (rem_w >> lef_w);
+ rem_w = CUT_END(rem_w, lef_w);
+ map_w = han_u->map_w;
+
+ if ( !BIT_SET(map_w, bit_w) ) {
+ return u3_none;
+ }
+ else {
+ c3_w inx_w = _ch_popcount(CUT_END(map_w, bit_w));
+ c3_w sot_w = han_u->sot_w[inx_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ if ( _(u3r_sing(key, u3h(kev))) ) {
+ return u3t(kev);
+ }
+ else {
+ return u3_none;
+ }
+ }
+ else {
+ void* hav_v = u3h_slot_to_node(sot_w);
+
+ if ( 0 == lef_w ) {
+ return _ch_buck_git(hav_v, key);
+ }
+ else return _ch_node_git(hav_v, lef_w, rem_w, key);
+ }
+ }
+}
+
+/* u3h_git(): read from hashtable.
+**
+** `key` is RETAINED; result is RETAINED.
+*/
+u3_weak
+u3h_git(u3p(u3h_root) har_p, u3_noun key)
+{
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ c3_w mug_w = u3r_mug(key);
+ c3_w inx_w = (mug_w >> 25);
+ c3_w rem_w = CUT_END(mug_w, 25);
+ c3_w sot_w = har_u->sot_w[inx_w];
+
+ if ( _(u3h_slot_is_null(sot_w)) ) {
+ return u3_none;
+ }
+ else if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ if ( _(u3r_sing(key, u3h(kev))) ) {
+ har_u->sot_w[inx_w] = u3h_noun_be_warm(sot_w);
+ return u3t(kev);
+ }
+ else {
+ return u3_none;
+ }
+ }
+ else {
+ u3h_node* han_u = u3h_slot_to_node(sot_w);
+
+ return _ch_node_git(han_u, 25, rem_w, key);
+ }
+}
+
+/* u3h_get(): read from hashtable, incrementing refcount.
+**
+** `key` is RETAINED; result is PRODUCED.
+*/
+u3_weak
+u3h_get(u3p(u3h_root) har_p, u3_noun key)
+{
+ u3_noun pro = u3h_git(har_p, key);
+
+ if ( u3_none != pro ) {
+ u3k(pro);
+ }
+ return pro;
+}
+
+/* _ch_free_buck(): free bucket
+*/
+static void
+_ch_free_buck(u3h_buck* hab_u)
+{
+ //fprintf(stderr, "free buck\r\n");
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ u3z(u3h_slot_to_noun(hab_u->sot_w[i_w]));
+ }
+ u3a_wfree(hab_u);
+}
+
+/* _ch_free_node(): free node.
+*/
+static void
+_ch_free_node(u3h_node* han_u, c3_w lef_w, c3_o pin_o)
+{
+ c3_w len_w = _ch_popcount(han_u->map_w);
+ c3_w i_w;
+
+ lef_w -= 5;
+
+ for ( i_w = 0; i_w < len_w; i_w++ ) {
+ c3_w sot_w = han_u->sot_w[i_w];
+ if ( _(u3h_slot_is_null(sot_w))) {
+ } else if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3z(u3h_slot_to_noun(sot_w));
+ } else {
+ void* hav_v = u3h_slot_to_node(sot_w);
+
+ if ( 0 == lef_w ) {
+ _ch_free_buck(hav_v);
+ } else {
+ _ch_free_node(hav_v, lef_w, pin_o);
+ }
+ }
+ }
+ u3a_wfree(han_u);
+}
+
+/* u3h_free(): free hashtable.
+*/
+void
+u3h_free(u3p(u3h_root) har_p)
+{
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < 64; i_w++ ) {
+ c3_w sot_w = har_u->sot_w[i_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3z(u3h_slot_to_noun(sot_w));
+ }
+ else if ( _(u3h_slot_is_node(sot_w)) ) {
+ u3h_node* han_u = u3h_slot_to_node(sot_w);
+
+ _ch_free_node(han_u, 25, i_w == 57);
+ }
+ }
+ u3a_wfree(har_u);
+}
+
+/* _ch_walk_buck(): walk bucket for gc.
+*/
+static void
+_ch_walk_buck(u3h_buck* hab_u, void (*fun_f)(u3_noun, void*), void* wit)
+{
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ fun_f(u3h_slot_to_noun(hab_u->sot_w[i_w]), wit);
+ }
+}
+
+/* _ch_walk_node(): walk node for gc.
+*/
+static void
+_ch_walk_node(u3h_node* han_u, c3_w lef_w, void (*fun_f)(u3_noun, void*), void* wit)
+{
+ c3_w len_w = _ch_popcount(han_u->map_w);
+ c3_w i_w;
+
+ lef_w -= 5;
+
+ for ( i_w = 0; i_w < len_w; i_w++ ) {
+ c3_w sot_w = han_u->sot_w[i_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ fun_f(kev, wit);
+ }
+ else {
+ void* hav_v = u3h_slot_to_node(sot_w);
+
+ if ( 0 == lef_w ) {
+ _ch_walk_buck(hav_v, fun_f, wit);
+ } else {
+ _ch_walk_node(hav_v, lef_w, fun_f, wit);
+ }
+ }
+ }
+}
+
+/* u3h_walk_with(): traverse hashtable with key, value fn and data
+ * argument; RETAINS.
+*/
+void
+u3h_walk_with(u3p(u3h_root) har_p,
+ void (*fun_f)(u3_noun, void*),
+ void* wit)
+{
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < 64; i_w++ ) {
+ c3_w sot_w = har_u->sot_w[i_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ fun_f(kev, wit);
+ }
+ else if ( _(u3h_slot_is_node(sot_w)) ) {
+ u3h_node* han_u = u3h_slot_to_node(sot_w);
+
+ _ch_walk_node(han_u, 25, fun_f, wit);
+ }
+ }
+}
+
+/* _ch_walk_plain(): use plain u3_noun fun_f for each node
+ */
+static void
+_ch_walk_plain(u3_noun kev, void* wit)
+{
+ void (*fun_f)(u3_noun) = (void (*)(u3_noun))wit;
+ fun_f(kev);
+}
+
+/* u3h_walk(): u3h_walk_with, but with no data argument
+*/
+void
+u3h_walk(u3p(u3h_root) har_p, void (*fun_f)(u3_noun))
+{
+ u3h_walk_with(har_p, _ch_walk_plain, (void *)fun_f);
+}
+
+/* _ch_take_noun(): take key and call [fun_f] on val.
+*/
+static u3h_slot
+_ch_take_noun(u3h_slot sot_w, u3_funk fun_f)
+{
+ u3_noun kov = u3h_slot_to_noun(sot_w);
+ u3_noun kev = u3nc(u3a_take(u3h(kov)),
+ fun_f(u3t(kov)));
+
+ return u3h_noun_to_slot(kev);
+}
+
+/* _ch_take_buck(): take bucket and contents
+*/
+static u3h_slot
+_ch_take_buck(u3h_slot sot_w, u3_funk fun_f)
+{
+ u3h_buck* hab_u = u3h_slot_to_node(sot_w);
+ u3h_buck* bah_u = _ch_buck_new(hab_u->len_w);
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ bah_u->sot_w[i_w] = _ch_take_noun(hab_u->sot_w[i_w], fun_f);
+ }
+
+ return u3h_node_to_slot(bah_u);
+}
+
+/* _ch_take_node(): take node and contents
+*/
+static u3h_slot
+_ch_take_node(u3h_slot sot_w, c3_w lef_w, u3_funk fun_f)
+{
+ u3h_node* han_u = u3h_slot_to_node(sot_w);
+ c3_w len_w = _ch_popcount(han_u->map_w);
+ u3h_node* nah_u = _ch_node_new(len_w);
+ c3_w i_w;
+
+ nah_u->map_w = han_u->map_w;
+ lef_w -= 5;
+
+ for ( i_w = 0; i_w < len_w; i_w++ ) {
+ c3_w tos_w = han_u->sot_w[i_w];
+ nah_u->sot_w[i_w] = ( c3y == u3h_slot_is_noun(tos_w) )
+ ? _ch_take_noun(tos_w, fun_f)
+ : ( 0 == lef_w )
+ ? _ch_take_buck(tos_w, fun_f)
+ : _ch_take_node(tos_w, lef_w, fun_f);
+ }
+
+ return u3h_node_to_slot(nah_u);
+}
+
+/* u3h_take_with(): gain hashtable, copying junior keys
+** and calling [fun_f] on values
+*/
+u3p(u3h_root)
+u3h_take_with(u3p(u3h_root) har_p, u3_funk fun_f)
+{
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ u3p(u3h_root) rah_p = u3h_new_cache(har_u->max_w);
+ u3h_root* rah_u = u3to(u3h_root, rah_p);
+ c3_w sot_w, i_w;
+
+ rah_u->use_w = har_u->use_w;
+ rah_u->arm_u = har_u->arm_u;
+
+ for ( i_w = 0; i_w < 64; i_w++ ) {
+ sot_w = har_u->sot_w[i_w];
+ if ( c3n == u3h_slot_is_null(sot_w) ) {
+ rah_u->sot_w[i_w] = ( c3y == u3h_slot_is_noun(sot_w) )
+ ? _ch_take_noun(sot_w, fun_f)
+ : _ch_take_node(sot_w, 25, fun_f);
+ }
+ }
+
+ return rah_p;
+}
+
+/* u3h_take(): gain hashtable, copying junior nouns
+*/
+u3p(u3h_root)
+u3h_take(u3p(u3h_root) har_p)
+{
+ return u3h_take_with(har_p, u3a_take);
+}
+
+/* _ch_mark_buck(): mark bucket for gc.
+*/
+c3_w
+_ch_mark_buck(u3h_buck* hab_u)
+{
+ c3_w tot_w = 0;
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ tot_w += u3a_mark_noun(u3h_slot_to_noun(hab_u->sot_w[i_w]));
+ }
+ tot_w += u3a_mark_ptr(hab_u);
+
+ return tot_w;
+}
+
+/* _ch_mark_node(): mark node for gc.
+*/
+c3_w
+_ch_mark_node(u3h_node* han_u, c3_w lef_w)
+{
+ c3_w tot_w = 0;
+ c3_w len_w = _ch_popcount(han_u->map_w);
+ c3_w i_w;
+
+ lef_w -= 5;
+
+ for ( i_w = 0; i_w < len_w; i_w++ ) {
+ c3_w sot_w = han_u->sot_w[i_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ tot_w += u3a_mark_noun(kev);
+ }
+ else {
+ void* hav_v = u3h_slot_to_node(sot_w);
+
+ if ( 0 == lef_w ) {
+ tot_w += _ch_mark_buck(hav_v);
+ } else {
+ tot_w += _ch_mark_node(hav_v, lef_w);
+ }
+ }
+ }
+
+ tot_w += u3a_mark_ptr(han_u);
+
+ return tot_w;
+}
+
+/* u3h_mark(): mark hashtable for gc.
+*/
+c3_w
+u3h_mark(u3p(u3h_root) har_p)
+{
+ c3_w tot_w = 0;
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < 64; i_w++ ) {
+ c3_w sot_w = har_u->sot_w[i_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ tot_w += u3a_mark_noun(kev);
+ }
+ else if ( _(u3h_slot_is_node(sot_w)) ) {
+ u3h_node* han_u = u3h_slot_to_node(sot_w);
+
+ tot_w += _ch_mark_node(han_u, 25);
+ }
+ }
+
+ tot_w += u3a_mark_ptr(har_u);
+
+ return tot_w;
+}
+
+static void
+_ch_relocate_noun(u3h_slot *sot_w)
+{
+ u3_noun kev = u3h_slot_to_noun(*sot_w);
+ u3a_relocate_noun(&kev);
+ *sot_w = u3h_noun_to_slot(kev);
+}
+
+static void
+_ch_relocate_buck(u3h_slot *sot_w)
+{
+ u3h_buck *hab_u = u3h_slot_to_node(*sot_w);
+ u3_post new_p, sot_p = u3a_outa(hab_u);
+ c3_t fir_t;
+
+ new_p = u3a_mark_relocate_post(sot_p, &fir_t);
+ *sot_w = u3h_node_to_slot(u3a_into(new_p));
+
+ if ( !fir_t ) return;
+
+ for ( c3_w i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ _ch_relocate_noun(&(hab_u->sot_w[i_w]));
+ }
+}
+
+static void
+_ch_relocate_slot(u3h_slot *sot_w, c3_w lef_w);
+
+static void
+_ch_relocate_node(u3h_slot *sot_w, c3_w lef_w)
+{
+ u3h_node* han_u = u3h_slot_to_node(*sot_w);
+ u3_post new_p, sot_p = u3a_outa(han_u);
+ c3_w len_w;
+ c3_t fir_t;
+
+ new_p = u3a_mark_relocate_post(sot_p, &fir_t);
+ *sot_w = u3h_node_to_slot(u3a_into(new_p));
+
+ if ( !fir_t ) return;
+
+ len_w = _ch_popcount(han_u->map_w);
+ lef_w -= 5;
+
+ for ( c3_w i_w = 0; i_w < len_w; i_w++ ) {
+ _ch_relocate_slot(&(han_u->sot_w[i_w]), lef_w);
+ }
+}
+
+static void
+_ch_relocate_slot(u3h_slot *sot_w, c3_w lef_w)
+{
+ if ( c3y == u3h_slot_is_noun(*sot_w) ) {
+ _ch_relocate_noun(sot_w);
+ }
+ else if ( !lef_w ) {
+ _ch_relocate_buck(sot_w);
+ }
+ else {
+ _ch_relocate_node(sot_w, lef_w);
+ }
+}
+
+/* u3h_relocate(): relocate hashtable for compaction.
+*/
+void
+u3h_relocate(u3p(u3h_root) *har_p)
+{
+ u3_post new_p, old_p = *har_p;
+ u3h_root* har_u = u3to(u3h_root, old_p);
+ c3_w sot_w, i_w;
+ c3_t fir_t;
+
+ new_p = u3a_mark_relocate_post(old_p, &fir_t);
+ *har_p = new_p;
+
+ if ( !fir_t ) return;
+
+ for ( i_w = 0; i_w < 64; i_w++ ) {
+ sot_w = har_u->sot_w[i_w];
+
+ if ( c3n == u3h_slot_is_null(sot_w) ) {
+ _ch_relocate_slot(&(har_u->sot_w[i_w]), 25);
+ }
+ }
+}
+
+/* _ch_count_buck(): count bucket for gc.
+*/
+c3_w
+_ch_count_buck(u3h_buck* hab_u)
+{
+ c3_w tot_w = 0;
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ tot_w += u3a_count_noun(u3h_slot_to_noun(hab_u->sot_w[i_w]));
+ }
+ tot_w += u3a_count_ptr(hab_u);
+
+ return tot_w;
+}
+
+/* _ch_count_node(): count node for gc.
+*/
+c3_w
+_ch_count_node(u3h_node* han_u, c3_w lef_w)
+{
+ c3_w tot_w = 0;
+ c3_w len_w = _ch_popcount(han_u->map_w);
+ c3_w i_w;
+
+ lef_w -= 5;
+
+ for ( i_w = 0; i_w < len_w; i_w++ ) {
+ c3_w sot_w = han_u->sot_w[i_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ tot_w += u3a_count_noun(kev);
+ }
+ else {
+ void* hav_v = u3h_slot_to_node(sot_w);
+
+ if ( 0 == lef_w ) {
+ tot_w += _ch_count_buck(hav_v);
+ } else {
+ tot_w += _ch_count_node(hav_v, lef_w);
+ }
+ }
+ }
+
+ tot_w += u3a_count_ptr(han_u);
+
+ return tot_w;
+}
+
+/* u3h_count(): count hashtable for gc.
+*/
+c3_w
+u3h_count(u3p(u3h_root) har_p)
+{
+ c3_w tot_w = 0;
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < 64; i_w++ ) {
+ c3_w sot_w = har_u->sot_w[i_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ tot_w += u3a_count_noun(kev);
+ }
+ else if ( _(u3h_slot_is_node(sot_w)) ) {
+ u3h_node* han_u = u3h_slot_to_node(sot_w);
+
+ tot_w += _ch_count_node(han_u, 25);
+ }
+ }
+
+ tot_w += u3a_count_ptr(har_u);
+
+ return tot_w;
+}
+
+/* _ch_discount_buck(): discount bucket for gc.
+*/
+c3_w
+_ch_discount_buck(u3h_buck* hab_u)
+{
+ c3_w tot_w = 0;
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < hab_u->len_w; i_w++ ) {
+ tot_w += u3a_discount_noun(u3h_slot_to_noun(hab_u->sot_w[i_w]));
+ }
+ tot_w += u3a_discount_ptr(hab_u);
+
+ return tot_w;
+}
+
+/* _ch_discount_node(): discount node for gc.
+*/
+c3_w
+_ch_discount_node(u3h_node* han_u, c3_w lef_w)
+{
+ c3_w tot_w = 0;
+ c3_w len_w = _ch_popcount(han_u->map_w);
+ c3_w i_w;
+
+ lef_w -= 5;
+
+ for ( i_w = 0; i_w < len_w; i_w++ ) {
+ c3_w sot_w = han_u->sot_w[i_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ tot_w += u3a_discount_noun(kev);
+ }
+ else {
+ void* hav_v = u3h_slot_to_node(sot_w);
+
+ if ( 0 == lef_w ) {
+ tot_w += _ch_discount_buck(hav_v);
+ } else {
+ tot_w += _ch_discount_node(hav_v, lef_w);
+ }
+ }
+ }
+
+ tot_w += u3a_discount_ptr(han_u);
+
+ return tot_w;
+}
+
+/* u3h_discount(): discount hashtable for gc.
+*/
+c3_w
+u3h_discount(u3p(u3h_root) har_p)
+{
+ c3_w tot_w = 0;
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ c3_w i_w;
+
+ for ( i_w = 0; i_w < 64; i_w++ ) {
+ c3_w sot_w = har_u->sot_w[i_w];
+
+ if ( _(u3h_slot_is_noun(sot_w)) ) {
+ u3_noun kev = u3h_slot_to_noun(sot_w);
+
+ tot_w += u3a_discount_noun(kev);
+ }
+ else if ( _(u3h_slot_is_node(sot_w)) ) {
+ u3h_node* han_u = u3h_slot_to_node(sot_w);
+
+ tot_w += _ch_discount_node(han_u, 25);
+ }
+ }
+
+ tot_w += u3a_discount_ptr(har_u);
+
+ return tot_w;
+}
+
+/* u3h_wyt(): number of entries
+*/
+c3_w
+u3h_wyt(u3p(u3h_root) har_p)
+{
+ u3h_root* har_u = u3to(u3h_root, har_p);
+ return har_u->use_w;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-16 07:13:10 +0000