mirror of
https://github.com/urbit/shrub.git
synced 2024-12-22 18:31:44 +03:00
8bf02a857a
* master: (99 commits) updates contact instructions erased some lines in raft updates libent submodule cleans up event error handling in _raft_lame Remove includes introduced for getentropy Use libent for getentropy Fix link in README remove old version of u3r_mug() renames test-hash removes temporary u3r_mug tests adds assertions to protect u3r_mug against stack overflow adds a u3_none explicit bottom stack frame to u3r_mug WIP simplified conditionals, still dies, appears stateful? WIP refactored but still dying WIP still dying WIP testing and printing WIP compiles but crashes updates CONTRIBUTING.md, removing obsolete instructions exit cleanly if $galaxy is already running (fake or real) corrects usage instructions ...
1730 lines
33 KiB
C
1730 lines
33 KiB
C
/* g/r.c
|
|
**
|
|
*/
|
|
#include "all.h"
|
|
#include <murmur3.h>
|
|
|
|
/* _frag_word(): fast fragment/branch prediction for top word.
|
|
*/
|
|
static u3_weak
|
|
_frag_word(c3_w a_w, u3_noun b)
|
|
{
|
|
c3_assert(0 != a_w);
|
|
|
|
{
|
|
c3_w dep_w = u3x_dep(a_w);
|
|
|
|
while ( dep_w ) {
|
|
if ( c3n == u3a_is_cell(b) ) {
|
|
return u3_none;
|
|
}
|
|
else {
|
|
u3a_cell* b_u = u3a_to_ptr(b);
|
|
|
|
b = *(((u3_noun*)&(b_u->hed)) + (1 & (a_w >> (dep_w - 1))));
|
|
dep_w--;
|
|
}
|
|
}
|
|
return b;
|
|
}
|
|
}
|
|
|
|
/* _frag_deep(): fast fragment/branch for deep words.
|
|
*/
|
|
static u3_weak
|
|
_frag_deep(c3_w a_w, u3_noun b)
|
|
{
|
|
c3_w dep_w = 32;
|
|
|
|
while ( dep_w ) {
|
|
if ( c3n == u3a_is_cell(b) ) {
|
|
return u3_none;
|
|
}
|
|
else {
|
|
u3a_cell* b_u = u3a_to_ptr(b);
|
|
|
|
b = *(((u3_noun*)&(b_u->hed)) + (1 & (a_w >> (dep_w - 1))));
|
|
dep_w--;
|
|
}
|
|
}
|
|
return b;
|
|
}
|
|
|
|
/* u3r_at():
|
|
**
|
|
** Return fragment (a) of (b), or u3_none if not applicable.
|
|
*/
|
|
u3_weak
|
|
u3r_at(u3_atom a, u3_noun b)
|
|
{
|
|
c3_assert(u3_none != a);
|
|
c3_assert(u3_none != b);
|
|
|
|
u3t_on(far_o);
|
|
|
|
if ( 0 == a ) {
|
|
u3t_off(far_o);
|
|
return u3_none;
|
|
}
|
|
|
|
if ( _(u3a_is_cat(a)) ) {
|
|
u3t_off(far_o);
|
|
return _frag_word(a, b);
|
|
}
|
|
else {
|
|
if ( !_(u3a_is_pug(a)) ) {
|
|
u3t_off(far_o);
|
|
return u3_none;
|
|
}
|
|
else {
|
|
u3a_atom* a_u = u3a_to_ptr(a);
|
|
c3_w len_w = a_u->len_w;
|
|
|
|
b = _frag_word(a_u->buf_w[len_w - 1], b);
|
|
len_w -= 1;
|
|
|
|
if ( u3_none == b ) {
|
|
u3t_off(far_o);
|
|
return b;
|
|
}
|
|
|
|
while ( len_w ) {
|
|
b = _frag_deep(a_u->buf_w[len_w - 1], b);
|
|
|
|
if ( u3_none == b ) {
|
|
u3t_off(far_o);
|
|
|
|
return b;
|
|
} else {
|
|
len_w--;
|
|
}
|
|
}
|
|
u3t_off(far_o);
|
|
|
|
return b;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_mean():
|
|
**
|
|
** Attempt to deconstruct `a` by axis, noun pairs; 0 terminates.
|
|
** Axes must be sorted in tree order.
|
|
*/
|
|
struct _mean_pair {
|
|
c3_w axe_w;
|
|
u3_noun* som;
|
|
};
|
|
|
|
static c3_w
|
|
_mean_cut(c3_w len_w,
|
|
struct _mean_pair* prs_m)
|
|
{
|
|
c3_w i_w, cut_t, cut_w;
|
|
|
|
cut_t = 0;
|
|
cut_w = 0;
|
|
for ( i_w = 0; i_w < len_w; i_w++ ) {
|
|
c3_w axe_w = prs_m[i_w].axe_w;
|
|
|
|
if ( (cut_t == 0) && (3 == u3x_cap(axe_w)) ) {
|
|
cut_t = 1;
|
|
cut_w = i_w;
|
|
}
|
|
prs_m[i_w].axe_w = u3x_mas(axe_w);
|
|
}
|
|
return cut_t ? cut_w : i_w;
|
|
}
|
|
|
|
static c3_o
|
|
_mean_extract(u3_noun som,
|
|
c3_w len_w,
|
|
struct _mean_pair* prs_m)
|
|
{
|
|
if ( len_w == 0 ) {
|
|
return c3y;
|
|
}
|
|
else if ( (len_w == 1) && (1 == prs_m[0].axe_w) ) {
|
|
*prs_m->som = som;
|
|
return c3y;
|
|
}
|
|
else {
|
|
if ( c3n == u3a_is_cell(som) ) {
|
|
return c3n;
|
|
} else {
|
|
c3_w cut_w = _mean_cut(len_w, prs_m);
|
|
|
|
return c3a
|
|
(_mean_extract(u3a_h(som), cut_w, prs_m),
|
|
_mean_extract(u3a_t(som), (len_w - cut_w), (prs_m + cut_w)));
|
|
}
|
|
}
|
|
}
|
|
|
|
__attribute__((no_sanitize("address")))
|
|
c3_o
|
|
u3r_mean(u3_noun som,
|
|
...)
|
|
{
|
|
va_list ap;
|
|
c3_w len_w;
|
|
struct _mean_pair* prs_m;
|
|
|
|
c3_assert(u3_none != som);
|
|
|
|
/* Count.
|
|
*/
|
|
len_w = 0;
|
|
{
|
|
va_start(ap, som);
|
|
while ( 1 ) {
|
|
if ( 0 == va_arg(ap, c3_w) ) {
|
|
break;
|
|
}
|
|
va_arg(ap, u3_noun*);
|
|
len_w++;
|
|
}
|
|
va_end(ap);
|
|
}
|
|
|
|
c3_assert( 0 != len_w );
|
|
prs_m = alloca(len_w * sizeof(struct _mean_pair));
|
|
|
|
/* Install.
|
|
*/
|
|
{
|
|
c3_w i_w;
|
|
|
|
va_start(ap, som);
|
|
for ( i_w = 0; i_w < len_w; i_w++ ) {
|
|
prs_m[i_w].axe_w = va_arg(ap, c3_w);
|
|
prs_m[i_w].som = va_arg(ap, u3_noun*);
|
|
}
|
|
va_end(ap);
|
|
}
|
|
|
|
/* Extract.
|
|
*/
|
|
return _mean_extract(som, len_w, prs_m);
|
|
}
|
|
|
|
/* _sang_one(): unify but leak old.
|
|
*/
|
|
static void
|
|
_sang_one(u3_noun* a, u3_noun* b)
|
|
{
|
|
if ( *a == *b ) {
|
|
return;
|
|
}
|
|
else {
|
|
c3_o asr_o = u3a_is_senior(u3R, *a);
|
|
c3_o bsr_o = u3a_is_senior(u3R, *b);
|
|
|
|
if ( _(asr_o) && _(bsr_o) ) {
|
|
// You shouldn't have let this happen. We don't want to
|
|
// descend down to a lower road and free there, because
|
|
// synchronization - though this could be revisited under
|
|
// certain circumstances.
|
|
//
|
|
return;
|
|
}
|
|
if ( _(asr_o) && !_(bsr_o) ){
|
|
// u3z(*b);
|
|
*b = *a;
|
|
}
|
|
if ( _(bsr_o) && !_(asr_o) ) {
|
|
// u3z(*a);
|
|
*a = *b;
|
|
}
|
|
if ( u3a_is_north(u3R) ) {
|
|
if ( *a <= *b ) {
|
|
u3k(*a);
|
|
// u3z(*b);
|
|
*b = *a;
|
|
} else {
|
|
u3k(*b);
|
|
// u3z(*a);
|
|
*a = *b;
|
|
}
|
|
}
|
|
else {
|
|
if ( *a >= *b ) {
|
|
u3k(*a);
|
|
// u3z(*b);
|
|
*b = *a;
|
|
} else {
|
|
u3k(*b);
|
|
// u3z(*a);
|
|
*a = *b;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#define SONG_NONE 0
|
|
#define SONG_HEAD 1
|
|
#define SONG_TAIL 2
|
|
|
|
typedef struct {
|
|
c3_y sat_y;
|
|
u3_noun a;
|
|
u3_noun b;
|
|
} eqframe;
|
|
|
|
static inline eqframe*
|
|
_eq_push(c3_ys mov, c3_ys off, u3_noun a, u3_noun b)
|
|
{
|
|
u3R->cap_p += mov;
|
|
eqframe* cur = u3to(eqframe, u3R->cap_p + off);
|
|
cur->sat_y = SONG_NONE;
|
|
cur->a = a;
|
|
cur->b = b;
|
|
return cur;
|
|
}
|
|
|
|
static inline eqframe*
|
|
_eq_pop(c3_ys mov, c3_ys off)
|
|
{
|
|
u3R->cap_p -= mov;
|
|
return u3to(eqframe, u3R->cap_p + off);
|
|
}
|
|
|
|
/* _sing_one(): do not pick a unified pointer for identical (a) and (b).
|
|
*/
|
|
static void
|
|
_sing_one(u3_noun* a, u3_noun* b)
|
|
{
|
|
// this space left intentionally blank
|
|
}
|
|
|
|
/* _sung_one(): pick a unified pointer for identical (a) and (b).
|
|
**
|
|
** Assumes exclusive access to noun memory.
|
|
*/
|
|
static void
|
|
_sung_one(u3_noun* a, u3_noun* b)
|
|
{
|
|
|
|
if ( *a == *b ) {
|
|
return;
|
|
} else {
|
|
u3_road* rod_u = u3R;
|
|
while ( 1 ) {
|
|
//
|
|
// we can't perform this kind of butchery on the home road,
|
|
// where asynchronous things can allocate.
|
|
//
|
|
if ( u3R == &u3H->rod_u ) {
|
|
break;
|
|
}
|
|
else {
|
|
c3_o asr_o = u3a_is_senior(u3R, *a);
|
|
c3_o bsr_o = u3a_is_senior(u3R, *b);
|
|
|
|
if ( _(asr_o) && _(bsr_o) ) {
|
|
//
|
|
// when unifying on a higher road, we can't free nouns,
|
|
// because we can't track junior nouns that point into
|
|
// that road.
|
|
//
|
|
// this is just an implementation issue -- we could set use
|
|
// counts to 0 without actually freeing. but the allocator
|
|
// would have to be actually designed for this.
|
|
//
|
|
// not freeing may generate spurious leaks, so we disable
|
|
// senior unification when debugging memory. this will
|
|
// cause a very slow boot process as the compiler compiles
|
|
// itself, constantly running into duplicates.
|
|
//
|
|
#ifdef U3_MEMORY_DEBUG
|
|
return;
|
|
#else
|
|
u3R = u3to(u3_road, u3R->par_p);
|
|
continue;
|
|
#endif
|
|
}
|
|
|
|
if ( _(asr_o) && !_(bsr_o) ){
|
|
if ( u3R == rod_u ) { u3z(*b); }
|
|
*b = *a;
|
|
}
|
|
if ( _(bsr_o) && !_(asr_o) ) {
|
|
if ( u3R == rod_u ) { u3z(*a); }
|
|
*a = *b;
|
|
}
|
|
if ( u3a_is_north(u3R) ) {
|
|
if ( *a <= *b ) {
|
|
u3k(*a);
|
|
if ( u3R == rod_u ) { u3z(*b); }
|
|
*b = *a;
|
|
} else {
|
|
u3k(*b);
|
|
if ( u3R == rod_u ) { u3z(*a); }
|
|
*a = *b;
|
|
}
|
|
}
|
|
else {
|
|
if ( *a >= *b ) {
|
|
u3k(*a);
|
|
if ( u3R == rod_u ) { u3z(*b); }
|
|
*b = *a;
|
|
} else {
|
|
u3k(*b);
|
|
if ( u3R == rod_u ) { u3z(*a); }
|
|
*a = *b;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
u3R = rod_u;
|
|
}
|
|
}
|
|
|
|
static inline c3_o
|
|
_song_atom(u3_atom a, u3_atom b)
|
|
{
|
|
u3a_atom* a_u = u3a_to_ptr(a);
|
|
|
|
if ( !_(u3a_is_atom(b)) ||
|
|
_(u3a_is_cat(a)) ||
|
|
_(u3a_is_cat(b)) )
|
|
{
|
|
return c3n;
|
|
}
|
|
else {
|
|
u3a_atom* b_u = u3a_to_ptr(b);
|
|
|
|
if ( a_u->mug_w &&
|
|
b_u->mug_w &&
|
|
(a_u->mug_w != b_u->mug_w) )
|
|
{
|
|
return c3n;
|
|
}
|
|
else {
|
|
c3_w w_rez = a_u->len_w;
|
|
c3_w w_mox = b_u->len_w;
|
|
|
|
if ( w_rez != w_mox ) {
|
|
return c3n;
|
|
}
|
|
else {
|
|
c3_w i_w;
|
|
|
|
for ( i_w = 0; i_w < w_rez; i_w++ ) {
|
|
if ( a_u->buf_w[i_w] != b_u->buf_w[i_w] ) {
|
|
return c3n;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return c3y;
|
|
}
|
|
|
|
/* _song_x_cape(): unifying equality with comparison deduplication
|
|
* (tightly coupled to _song_x)
|
|
*/
|
|
static c3_o
|
|
_song_x_cape(c3_ys mov, c3_ys off,
|
|
eqframe* fam, eqframe* don,
|
|
u3p(u3h_root) har_p,
|
|
void (*uni)(u3_noun*, u3_noun*))
|
|
{
|
|
u3_noun a, b, key;
|
|
u3_weak got;
|
|
u3a_cell* a_u;
|
|
u3a_cell* b_u;
|
|
|
|
while ( don != fam ) {
|
|
a = fam->a;
|
|
b = fam->b;
|
|
switch ( fam->sat_y ) {
|
|
case SONG_NONE:
|
|
if ( a == b ) {
|
|
break;
|
|
}
|
|
else if ( c3y == u3a_is_atom(a) ) {
|
|
if ( c3n == _song_atom(a, b) ) {
|
|
return c3n;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
else if ( c3y == u3a_is_atom(b) ) {
|
|
return c3n;
|
|
}
|
|
else {
|
|
u3a_cell* a_u = u3a_to_ptr(a);
|
|
u3a_cell* b_u = u3a_to_ptr(b);
|
|
|
|
if ( a_u->mug_w &&
|
|
b_u->mug_w &&
|
|
(a_u->mug_w != b_u->mug_w) ) {
|
|
return c3n;
|
|
}
|
|
else {
|
|
key = u3nc(u3a_to_off(a), u3a_to_off(b));
|
|
u3t_off(euq_o);
|
|
got = u3h_get(har_p, key);
|
|
u3t_on(euq_o);
|
|
u3z(key);
|
|
if ( u3_none != got ) {
|
|
fam = _eq_pop(mov, off);
|
|
continue;
|
|
}
|
|
fam->sat_y = SONG_HEAD;
|
|
fam = _eq_push(mov, off, a_u->hed, b_u->hed);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
case SONG_HEAD:
|
|
a_u = u3a_to_ptr(a);
|
|
b_u = u3a_to_ptr(b);
|
|
uni(&(a_u->hed), &(b_u->hed));
|
|
fam->sat_y = SONG_TAIL;
|
|
fam = _eq_push(mov, off, a_u->tel, b_u->tel);
|
|
continue;
|
|
|
|
case SONG_TAIL:
|
|
a_u = u3a_to_ptr(a);
|
|
b_u = u3a_to_ptr(b);
|
|
uni(&(a_u->tel), &(b_u->tel));
|
|
break;
|
|
|
|
default:
|
|
c3_assert(0);
|
|
break;
|
|
}
|
|
|
|
key = u3nc(u3a_to_off(a), u3a_to_off(b));
|
|
u3t_off(euq_o);
|
|
u3h_put(har_p, key, c3y);
|
|
u3t_on(euq_o);
|
|
u3z(key);
|
|
fam = _eq_pop(mov, off);
|
|
}
|
|
|
|
return c3y;
|
|
}
|
|
|
|
/* _song_x(): yes if a and b are the same noun, use uni to unify
|
|
*/
|
|
static c3_o
|
|
_song_x(u3_noun a, u3_noun b, void (*uni)(u3_noun*, u3_noun*))
|
|
{
|
|
u3p(eqframe) empty = u3R->cap_p;
|
|
|
|
c3_y wis_y = c3_wiseof(eqframe);
|
|
c3_o nor_o = u3a_is_north(u3R);
|
|
c3_ys mov = ( c3y == nor_o ? -wis_y : wis_y );
|
|
c3_ys off = ( c3y == nor_o ? 0 : -wis_y );
|
|
c3_s ovr_s = 0;
|
|
eqframe* fam = _eq_push(mov, off, a, b);
|
|
eqframe* don = u3to(eqframe, empty + off);
|
|
|
|
u3a_cell* a_u;
|
|
u3a_cell* b_u;
|
|
|
|
while ( don != fam ) {
|
|
a = fam->a;
|
|
b = fam->b;
|
|
switch ( fam->sat_y ) {
|
|
case SONG_NONE:
|
|
if ( a == b ) {
|
|
break;
|
|
}
|
|
else if ( c3y == u3a_is_atom(a) ) {
|
|
if ( c3n == _song_atom(a, b) ) {
|
|
u3R->cap_p = empty;
|
|
return c3n;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
else if ( c3y == u3a_is_atom(b) ) {
|
|
u3R->cap_p = empty;
|
|
return c3n;
|
|
}
|
|
else {
|
|
a_u = u3a_to_ptr(a);
|
|
b_u = u3a_to_ptr(b);
|
|
|
|
if ( a_u->mug_w &&
|
|
b_u->mug_w &&
|
|
(a_u->mug_w != b_u->mug_w) ) {
|
|
u3R->cap_p = empty;
|
|
return c3n;
|
|
}
|
|
else {
|
|
fam->sat_y = SONG_HEAD;
|
|
fam = _eq_push(mov, off, a_u->hed, b_u->hed);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
case SONG_HEAD:
|
|
a_u = u3a_to_ptr(a);
|
|
b_u = u3a_to_ptr(b);
|
|
uni(&(a_u->hed), &(b_u->hed));
|
|
fam->sat_y = SONG_TAIL;
|
|
fam = _eq_push(mov, off, a_u->tel, b_u->tel);
|
|
continue;
|
|
|
|
case SONG_TAIL:
|
|
a_u = u3a_to_ptr(a);
|
|
b_u = u3a_to_ptr(b);
|
|
uni(&(a_u->tel), &(b_u->tel));
|
|
break;
|
|
|
|
default:
|
|
c3_assert(0);
|
|
break;
|
|
}
|
|
|
|
if ( 0 == ++ovr_s ) {
|
|
u3p(u3h_root) har_p = u3h_new();
|
|
c3_o ret_o = _song_x_cape(mov, off, fam, don, har_p, uni);
|
|
u3h_free(har_p);
|
|
u3R->cap_p = empty;
|
|
return ret_o;
|
|
}
|
|
fam = _eq_pop(mov, off);
|
|
}
|
|
|
|
return c3y;
|
|
}
|
|
|
|
/* u3r_sang(): yes iff (a) and (b) are the same noun, unifying equals.
|
|
*/
|
|
c3_o
|
|
u3r_sang(u3_noun a, u3_noun b)
|
|
{
|
|
c3_o ret_o;
|
|
u3t_on(euq_o);
|
|
ret_o = _song_x(a, b, &_sang_one);
|
|
u3t_off(euq_o);
|
|
return ret_o;
|
|
}
|
|
|
|
/* u3r_sing():
|
|
**
|
|
** Yes iff (a) and (b) are the same noun.
|
|
*/
|
|
c3_o
|
|
u3r_sing(u3_noun a, u3_noun b)
|
|
{
|
|
#ifndef U3_MEMORY_DEBUG
|
|
if ( u3R->par_p ) {
|
|
return u3r_sang(a, b);
|
|
}
|
|
#endif
|
|
{
|
|
c3_o ret_o;
|
|
|
|
u3t_on(euq_o);
|
|
ret_o = _song_x(a, b, &_sing_one);
|
|
u3t_off(euq_o);
|
|
|
|
return ret_o;
|
|
}
|
|
}
|
|
|
|
/* u3r_sung(): yes iff (a) and (b) are the same noun, unifying equals.
|
|
*/
|
|
c3_o
|
|
u3r_sung(u3_noun a, u3_noun b)
|
|
{
|
|
c3_o ret_o;
|
|
u3t_on(euq_o);
|
|
ret_o = _song_x(a, b, &_sung_one);
|
|
u3t_off(euq_o);
|
|
return ret_o;
|
|
}
|
|
|
|
c3_o
|
|
u3r_fing(u3_noun a,
|
|
u3_noun b)
|
|
{
|
|
return (a == b) ? c3y : c3n;
|
|
}
|
|
|
|
/* u3r_sing_cell():
|
|
**
|
|
** Yes iff `[p q]` and `b` are the same noun.
|
|
*/
|
|
c3_o
|
|
u3r_sing_cell(u3_noun p,
|
|
u3_noun q,
|
|
u3_noun b)
|
|
{
|
|
return c3a(_(u3a_is_cell(b)),
|
|
c3a(u3r_sing(p, u3a_h(b)),
|
|
u3r_sing(q, u3a_t(b))));
|
|
}
|
|
c3_o
|
|
u3r_fing_cell(u3_noun p,
|
|
u3_noun q,
|
|
u3_noun b)
|
|
{
|
|
return c3a(_(u3a_is_cell(b)),
|
|
c3a(u3r_fing(p, u3a_h(b)),
|
|
u3r_fing(q, u3a_t(b))));
|
|
}
|
|
|
|
/* u3r_sing_mixt():
|
|
**
|
|
** Yes iff `[p q]` and `b` are the same noun.
|
|
*/
|
|
c3_o
|
|
u3r_sing_mixt(const c3_c* p_c,
|
|
u3_noun q,
|
|
u3_noun b)
|
|
{
|
|
return c3a(_(u3a_is_cell(b)),
|
|
c3a(u3r_sing_c(p_c, u3a_h(b)),
|
|
u3r_sing(q, u3a_t(b))));
|
|
}
|
|
c3_o
|
|
u3r_fing_mixt(const c3_c* p_c,
|
|
u3_noun q,
|
|
u3_noun b)
|
|
{
|
|
return c3a(_(u3a_is_cell(b)),
|
|
c3a(u3r_sing_c(p_c, u3a_h(b)),
|
|
u3r_fing(q, u3a_t(b))));
|
|
}
|
|
|
|
/* u3r_sing_trel():
|
|
**
|
|
** Yes iff `[p q r]` and `b` are the same noun.
|
|
*/
|
|
c3_o
|
|
u3r_sing_trel(u3_noun p,
|
|
u3_noun q,
|
|
u3_noun r,
|
|
u3_noun b)
|
|
{
|
|
return c3a(_(u3a_is_cell(b)),
|
|
c3a(u3r_sing(p, u3a_h(b)),
|
|
u3r_sing_cell(q, r, u3a_t(b))));
|
|
}
|
|
c3_o
|
|
u3r_fing_trel(u3_noun p,
|
|
u3_noun q,
|
|
u3_noun r,
|
|
u3_noun b)
|
|
{
|
|
return c3a(_(u3a_is_cell(b)),
|
|
c3a(u3r_fing(p, u3a_h(b)),
|
|
u3r_fing_cell(q, r, u3a_t(b))));
|
|
}
|
|
|
|
/* u3r_sing_qual():
|
|
**
|
|
** Yes iff `[p q r]` and `b` are the same noun.
|
|
*/
|
|
c3_o
|
|
u3r_sing_qual(u3_noun p,
|
|
u3_noun q,
|
|
u3_noun r,
|
|
u3_noun s,
|
|
u3_noun b)
|
|
{
|
|
return c3a(_(u3a_is_cell(b)),
|
|
c3a(u3r_sing(p, u3a_h(b)),
|
|
u3r_sing_trel(q, r, s, u3a_t(b))));
|
|
}
|
|
c3_o
|
|
u3r_fing_qual(u3_noun p,
|
|
u3_noun q,
|
|
u3_noun r,
|
|
u3_noun s,
|
|
u3_noun b)
|
|
{
|
|
return c3a(_(u3a_is_cell(b)),
|
|
c3a(u3r_fing(p, u3a_h(b)),
|
|
u3r_fing_trel(q, r, s, u3a_t(b))));
|
|
}
|
|
|
|
/* u3r_nord():
|
|
**
|
|
** Return 0, 1 or 2 if `a` is below, equal to, or above `b`.
|
|
*/
|
|
u3_atom
|
|
u3r_nord(u3_noun a,
|
|
u3_noun b)
|
|
{
|
|
c3_assert(u3_none != a);
|
|
c3_assert(u3_none != b);
|
|
|
|
if ( a == b ) {
|
|
return 1;
|
|
}
|
|
else {
|
|
if ( _(u3a_is_atom(a)) ) {
|
|
if ( !_(u3a_is_atom(b)) ) {
|
|
return 0;
|
|
} else {
|
|
if ( _(u3a_is_cat(a)) ) {
|
|
if ( _(u3a_is_cat(b)) ) {
|
|
return (a < b) ? 0 : 2;
|
|
}
|
|
else return 0;
|
|
}
|
|
else if ( _(u3a_is_cat(b)) ) {
|
|
return 2;
|
|
}
|
|
else {
|
|
u3a_atom* a_u = u3a_to_ptr(a);
|
|
u3a_atom* b_u = u3a_to_ptr(b);
|
|
|
|
c3_w w_rez = a_u->len_w;
|
|
c3_w w_mox = b_u->len_w;
|
|
|
|
if ( w_rez != w_mox ) {
|
|
return (w_rez < w_mox) ? 0 : 2;
|
|
}
|
|
else {
|
|
c3_w i_w;
|
|
|
|
for ( i_w = 0; i_w < w_rez; i_w++ ) {
|
|
c3_w ai_w = a_u->buf_w[i_w];
|
|
c3_w bi_w = b_u->buf_w[i_w];
|
|
|
|
if ( ai_w != bi_w ) {
|
|
return (ai_w < bi_w) ? 0 : 2;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if ( _(u3a_is_atom(b)) ) {
|
|
return 2;
|
|
} else {
|
|
u3_atom c = u3r_nord(u3a_h(a), u3a_h(b));
|
|
|
|
if ( 1 == c ) {
|
|
return u3r_nord(u3a_t(a), u3a_t(b));
|
|
} else {
|
|
return c;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_sing_c():
|
|
**
|
|
** Yes iff (b) is the same noun as the C string a_c.
|
|
*/
|
|
c3_o
|
|
u3r_sing_c(const c3_c* a_c,
|
|
u3_noun b)
|
|
{
|
|
c3_assert(u3_none != b);
|
|
|
|
if ( !_(u3a_is_atom(b)) ) {
|
|
return c3n;
|
|
}
|
|
else {
|
|
c3_w w_sof = strlen(a_c);
|
|
c3_w i_w;
|
|
|
|
if ( w_sof != u3r_met(3, b) ) {
|
|
return c3n;
|
|
}
|
|
for ( i_w = 0; i_w < w_sof; i_w++ ) {
|
|
if ( u3r_byte(i_w, b) != a_c[i_w] ) {
|
|
return c3n;
|
|
}
|
|
}
|
|
return c3y;
|
|
}
|
|
}
|
|
|
|
/* u3r_bush():
|
|
**
|
|
** Factor [a] as a bush [b.[p q] c].
|
|
*/
|
|
c3_o
|
|
u3r_bush(u3_noun a,
|
|
u3_noun* b,
|
|
u3_noun* c)
|
|
{
|
|
c3_assert(u3_none != a);
|
|
|
|
if ( _(u3a_is_atom(a)) ) {
|
|
return c3n;
|
|
}
|
|
else {
|
|
*b = u3a_h(a);
|
|
|
|
if ( _(u3a_is_atom(*b)) ) {
|
|
return c3n;
|
|
} else {
|
|
*c = u3a_t(a);
|
|
return c3y;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_cell():
|
|
**
|
|
** Factor (a) as a cell (b c).
|
|
*/
|
|
c3_o
|
|
u3r_cell(u3_noun a,
|
|
u3_noun* b,
|
|
u3_noun* c)
|
|
{
|
|
c3_assert(u3_none != a);
|
|
|
|
if ( _(u3a_is_atom(a)) ) {
|
|
return c3n;
|
|
}
|
|
else {
|
|
if ( b ) *b = u3a_h(a);
|
|
if ( c ) *c = u3a_t(a);
|
|
return c3y;
|
|
}
|
|
}
|
|
|
|
/* u3r_p():
|
|
**
|
|
** & [0] if [a] is of the form [b *c].
|
|
*/
|
|
c3_o
|
|
u3r_p(u3_noun a,
|
|
u3_noun b,
|
|
u3_noun* c)
|
|
{
|
|
u3_noun feg, nux;
|
|
|
|
if ( (c3y == u3r_cell(a, &feg, &nux)) &&
|
|
(c3y == u3r_sing(feg, b)) )
|
|
{
|
|
*c = nux;
|
|
return c3y;
|
|
}
|
|
else return c3n;
|
|
}
|
|
|
|
/* u3r_pq():
|
|
**
|
|
** & [0] if [a] is of the form [b *c d].
|
|
*/
|
|
c3_o
|
|
u3r_pq(u3_noun a,
|
|
u3_noun b,
|
|
u3_noun* c,
|
|
u3_noun* d)
|
|
{
|
|
u3_noun nux;
|
|
|
|
if ( (c3y == u3r_p(a, b, &nux)) &&
|
|
(c3y == u3r_cell(nux, c, d)) )
|
|
{
|
|
return c3y;
|
|
}
|
|
else return c3n;
|
|
}
|
|
|
|
/* u3r_pqr():
|
|
**
|
|
** & [0] if [a] is of the form [b *c *d *e].
|
|
*/
|
|
c3_o
|
|
u3r_pqr(u3_noun a,
|
|
u3_noun b,
|
|
u3_noun* c,
|
|
u3_noun* d,
|
|
u3_noun* e)
|
|
{
|
|
u3_noun nux;
|
|
|
|
if ( (c3y == u3r_p(a, b, &nux)) &&
|
|
(c3y == u3r_trel(nux, c, d, e)) )
|
|
{
|
|
return c3y;
|
|
}
|
|
else return c3n;
|
|
}
|
|
|
|
/* u3r_pqrs():
|
|
**
|
|
** & [0] if [a] is of the form [b *c *d *e *f].
|
|
*/
|
|
c3_o
|
|
u3r_pqrs(u3_noun a,
|
|
u3_noun b,
|
|
u3_noun* c,
|
|
u3_noun* d,
|
|
u3_noun* e,
|
|
u3_noun* f)
|
|
{
|
|
u3_noun nux;
|
|
|
|
if ( (c3y == u3r_p(a, b, &nux)) &&
|
|
(c3y == u3r_qual(nux, c, d, e, f)) )
|
|
{
|
|
return c3y;
|
|
}
|
|
else return c3n;
|
|
}
|
|
|
|
/* u3r_trel():
|
|
**
|
|
** Factor (a) as a trel (b c d).
|
|
*/
|
|
c3_o
|
|
u3r_trel(u3_noun a,
|
|
u3_noun *b,
|
|
u3_noun *c,
|
|
u3_noun *d)
|
|
{
|
|
u3_noun guf;
|
|
|
|
if ( (c3y == u3r_cell(a, b, &guf)) &&
|
|
(c3y == u3r_cell(guf, c, d)) ) {
|
|
return c3y;
|
|
}
|
|
else {
|
|
return c3n;
|
|
}
|
|
}
|
|
|
|
/* u3r_qual():
|
|
**
|
|
** Factor (a) as a qual (b c d e).
|
|
*/
|
|
c3_o
|
|
u3r_qual(u3_noun a,
|
|
u3_noun* b,
|
|
u3_noun* c,
|
|
u3_noun* d,
|
|
u3_noun* e)
|
|
{
|
|
u3_noun guf;
|
|
|
|
if ( (c3y == u3r_cell(a, b, &guf)) &&
|
|
(c3y == u3r_trel(guf, c, d, e)) ) {
|
|
return c3y;
|
|
}
|
|
else return c3n;
|
|
}
|
|
|
|
/* u3r_quil():
|
|
**
|
|
** Factor (a) as a quil (b c d e f).
|
|
*/
|
|
c3_o
|
|
u3r_quil(u3_noun a,
|
|
u3_noun* b,
|
|
u3_noun* c,
|
|
u3_noun* d,
|
|
u3_noun* e,
|
|
u3_noun* f)
|
|
{
|
|
u3_noun guf;
|
|
|
|
if ( (c3y == u3r_cell(a, b, &guf)) &&
|
|
(c3y == u3r_qual(guf, c, d, e, f)) ) {
|
|
return c3y;
|
|
}
|
|
else return c3n;
|
|
}
|
|
|
|
/* u3r_hext():
|
|
**
|
|
** Factor (a) as a hext (b c d e f g)
|
|
*/
|
|
c3_o
|
|
u3r_hext(u3_noun a,
|
|
u3_noun* b,
|
|
u3_noun* c,
|
|
u3_noun* d,
|
|
u3_noun* e,
|
|
u3_noun* f,
|
|
u3_noun* g)
|
|
{
|
|
u3_noun guf;
|
|
|
|
if ( (c3y == u3r_cell(a, b, &guf)) &&
|
|
(c3y == u3r_quil(guf, c, d, e, f, g)) ) {
|
|
return c3y;
|
|
}
|
|
else return c3n;
|
|
}
|
|
|
|
/* u3r_met():
|
|
**
|
|
** Return the size of (b) in bits, rounded up to
|
|
** (1 << a_y).
|
|
**
|
|
** For example, (a_y == 3) returns the size in bytes.
|
|
*/
|
|
c3_w
|
|
u3r_met(c3_y a_y,
|
|
u3_atom b)
|
|
{
|
|
c3_assert(u3_none != b);
|
|
c3_assert(_(u3a_is_atom(b)));
|
|
|
|
if ( b == 0 ) {
|
|
return 0;
|
|
}
|
|
else {
|
|
/* gal_w: number of words besides (daz_w) in (b).
|
|
** daz_w: top word in (b).
|
|
*/
|
|
c3_w gal_w;
|
|
c3_w daz_w;
|
|
|
|
if ( _(u3a_is_cat(b)) ) {
|
|
gal_w = 0;
|
|
daz_w = b;
|
|
}
|
|
else {
|
|
u3a_atom* b_u = u3a_to_ptr(b);
|
|
|
|
gal_w = (b_u->len_w) - 1;
|
|
daz_w = b_u->buf_w[gal_w];
|
|
}
|
|
|
|
switch ( a_y ) {
|
|
case 0:
|
|
case 1:
|
|
case 2: {
|
|
/* col_w: number of bits in (daz_w)
|
|
** bif_w: number of bits in (b)
|
|
*/
|
|
c3_w bif_w, col_w;
|
|
|
|
col_w = c3_bits_word(daz_w);
|
|
bif_w = col_w + (gal_w << 5);
|
|
|
|
return (bif_w + ((1 << a_y) - 1)) >> a_y;
|
|
}
|
|
case 3: {
|
|
return (gal_w << 2)
|
|
+ ((daz_w >> 24) ? 4 : (daz_w >> 16) ? 3 : (daz_w >> 8) ? 2 : 1);
|
|
}
|
|
case 4: {
|
|
return (gal_w << 1)
|
|
+ ((daz_w >> 16) ? 2 : 1);
|
|
}
|
|
default: {
|
|
c3_y gow_y = (a_y - 5);
|
|
|
|
return ((gal_w + 1) + ((1 << gow_y) - 1)) >> gow_y;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_bit():
|
|
**
|
|
** Return bit (a_w) of (b).
|
|
*/
|
|
c3_b
|
|
u3r_bit(c3_w a_w,
|
|
u3_atom b)
|
|
{
|
|
c3_assert(u3_none != b);
|
|
c3_assert(_(u3a_is_atom(b)));
|
|
|
|
if ( _(u3a_is_cat(b)) ) {
|
|
if ( a_w >= 31 ) {
|
|
return 0;
|
|
}
|
|
else return (1 & (b >> a_w));
|
|
}
|
|
else {
|
|
u3a_atom* b_u = u3a_to_ptr(b);
|
|
c3_y vut_y = (a_w & 31);
|
|
c3_w pix_w = (a_w >> 5);
|
|
|
|
if ( pix_w >= b_u->len_w ) {
|
|
return 0;
|
|
}
|
|
else {
|
|
c3_w nys_w = b_u->buf_w[pix_w];
|
|
|
|
return (1 & (nys_w >> vut_y));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_byte():
|
|
**
|
|
** Return byte (a_w) of (b).
|
|
*/
|
|
c3_y
|
|
u3r_byte(c3_w a_w,
|
|
u3_atom b)
|
|
{
|
|
c3_assert(u3_none != b);
|
|
c3_assert(_(u3a_is_atom(b)));
|
|
|
|
if ( _(u3a_is_cat(b)) ) {
|
|
if ( a_w > 3 ) {
|
|
return 0;
|
|
}
|
|
else return (255 & (b >> (a_w << 3)));
|
|
}
|
|
else {
|
|
u3a_atom* b_u = u3a_to_ptr(b);
|
|
c3_y vut_y = (a_w & 3);
|
|
c3_w pix_w = (a_w >> 2);
|
|
|
|
if ( pix_w >= b_u->len_w ) {
|
|
return 0;
|
|
}
|
|
else {
|
|
c3_w nys_w = b_u->buf_w[pix_w];
|
|
|
|
return (255 & (nys_w >> (vut_y << 3)));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_bytes():
|
|
**
|
|
** Copy bytes (a_w) through (a_w + b_w - 1) from (d) to (c).
|
|
*/
|
|
void
|
|
u3r_bytes(c3_w a_w,
|
|
c3_w b_w,
|
|
c3_y* c_y,
|
|
u3_atom d)
|
|
{
|
|
c3_assert(u3_none != d);
|
|
c3_assert(_(u3a_is_atom(d)));
|
|
|
|
if ( _(u3a_is_cat(d)) ) {
|
|
c3_w e_w = d >> (c3_min(a_w, 4) << 3);
|
|
c3_w m_w = c3_min(b_w, 4);
|
|
memcpy(c_y, (c3_y*)&e_w, m_w);
|
|
if ( b_w > 4 ) {
|
|
memset(c_y + 4, 0, b_w - 4);
|
|
}
|
|
}
|
|
else {
|
|
u3a_atom* d_u = u3a_to_ptr(d);
|
|
c3_w n_w = d_u->len_w << 2;
|
|
c3_y* x_y = (c3_y*)d_u->buf_w + a_w;
|
|
|
|
if ( a_w >= n_w ) {
|
|
memset(c_y, 0, b_w);
|
|
}
|
|
else {
|
|
c3_w z_w = c3_min(b_w, n_w - a_w);
|
|
memcpy(c_y, x_y, z_w);
|
|
if ( b_w > n_w - a_w ) {
|
|
memset(c_y + z_w, 0, b_w + a_w - n_w);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_mp():
|
|
**
|
|
** Copy (b) into (a_mp).
|
|
*/
|
|
void
|
|
u3r_mp(mpz_t a_mp,
|
|
u3_atom b)
|
|
{
|
|
c3_assert(u3_none != b);
|
|
c3_assert(_(u3a_is_atom(b)));
|
|
|
|
if ( _(u3a_is_cat(b)) ) {
|
|
mpz_init_set_ui(a_mp, b);
|
|
}
|
|
else {
|
|
u3a_atom* b_u = u3a_to_ptr(b);
|
|
c3_w len_w = b_u->len_w;
|
|
|
|
/* Slight deficiency in the GMP API.
|
|
*/
|
|
c3_assert(!(len_w >> 27));
|
|
mpz_init2(a_mp, len_w << 5);
|
|
|
|
/* Efficiency: horrible.
|
|
*/
|
|
{
|
|
c3_w *buf_w = alloca(len_w << 2);
|
|
c3_w i_w;
|
|
|
|
for ( i_w=0; i_w < len_w; i_w++ ) {
|
|
buf_w[i_w] = b_u->buf_w[i_w];
|
|
}
|
|
mpz_import(a_mp, len_w, -1, 4, 0, 0, buf_w);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_word():
|
|
**
|
|
** Return word (a_w) of (b).
|
|
*/
|
|
c3_w
|
|
u3r_word(c3_w a_w,
|
|
u3_atom b)
|
|
{
|
|
c3_assert(u3_none != b);
|
|
c3_assert(_(u3a_is_atom(b)));
|
|
|
|
if ( _(u3a_is_cat(b)) ) {
|
|
if ( a_w > 0 ) {
|
|
return 0;
|
|
}
|
|
else return b;
|
|
}
|
|
else {
|
|
u3a_atom* b_u = u3a_to_ptr(b);
|
|
|
|
if ( a_w >= b_u->len_w ) {
|
|
return 0;
|
|
}
|
|
else return b_u->buf_w[a_w];
|
|
}
|
|
}
|
|
|
|
/* u3r_chub():
|
|
**
|
|
** Return double-word (a_w) of (b).
|
|
*/
|
|
c3_d
|
|
u3r_chub(c3_w a_w,
|
|
u3_atom b)
|
|
{
|
|
c3_w wlo_w = u3r_word(a_w * 2, b);
|
|
c3_w whi_w = u3r_word(1 + (a_w * 2), b);
|
|
|
|
return (((uint64_t)whi_w) << 32ULL) | ((uint64_t)wlo_w);
|
|
}
|
|
|
|
/* u3r_words():
|
|
**
|
|
** Copy words (a_w) through (a_w + b_w - 1) from (d) to (c).
|
|
*/
|
|
void
|
|
u3r_words(c3_w a_w,
|
|
c3_w b_w,
|
|
c3_w* c_w,
|
|
u3_atom d)
|
|
{
|
|
c3_assert(u3_none != d);
|
|
c3_assert(_(u3a_is_atom(d)));
|
|
|
|
if ( b_w == 0 ) {
|
|
return;
|
|
}
|
|
if ( _(u3a_is_cat(d)) ) {
|
|
if ( a_w == 0 ) {
|
|
*c_w = d;
|
|
memset((c3_y*)(c_w + 1), 0, (b_w - 1) << 2);
|
|
}
|
|
else {
|
|
memset((c3_y*)c_w, 0, b_w << 2);
|
|
}
|
|
}
|
|
else {
|
|
u3a_atom* d_u = u3a_to_ptr(d);
|
|
if ( a_w >= d_u->len_w ) {
|
|
memset((c3_y*)c_w, 0, b_w << 2);
|
|
}
|
|
else {
|
|
c3_w z_w = c3_min(b_w, d_u->len_w - a_w);
|
|
c3_w* x_w = d_u->buf_w + a_w;
|
|
memcpy((c3_y*)c_w, (c3_y*)x_w, z_w << 2);
|
|
if ( b_w > d_u->len_w - a_w ) {
|
|
memset((c3_y*)(c_w + z_w), 0, (b_w + a_w - d_u->len_w) << 2);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_chubs():
|
|
**
|
|
** Copy double-words (a_w) through (a_w + b_w - 1) from (d) to (c).
|
|
*/
|
|
void
|
|
u3r_chubs(c3_w a_w,
|
|
c3_w b_w,
|
|
c3_d* c_d,
|
|
u3_atom d)
|
|
{
|
|
/* XX: assumes little-endian
|
|
*/
|
|
u3r_words(a_w * 2, b_w * 2, (c3_w *)c_d, d);
|
|
}
|
|
|
|
/* u3r_chop():
|
|
**
|
|
** Into the bloq space of `met`, from position `fum` for a
|
|
** span of `wid`, to position `tou`, XOR from atom `src`
|
|
** into `dst_w`.
|
|
*/
|
|
void
|
|
u3r_chop(c3_g met_g,
|
|
c3_w fum_w,
|
|
c3_w wid_w,
|
|
c3_w tou_w,
|
|
c3_w* dst_w,
|
|
u3_atom src)
|
|
{
|
|
c3_w i_w;
|
|
c3_w len_w;
|
|
c3_w* buf_w;
|
|
|
|
c3_assert(u3_none != src);
|
|
c3_assert(_(u3a_is_atom(src)));
|
|
|
|
if ( _(u3a_is_cat(src)) ) {
|
|
len_w = src ? 1 : 0;
|
|
buf_w = &src;
|
|
}
|
|
else {
|
|
u3a_atom* src_u = u3a_to_ptr(src);
|
|
|
|
len_w = src_u->len_w;
|
|
buf_w = src_u->buf_w;
|
|
}
|
|
|
|
if ( met_g < 5 ) {
|
|
c3_w san_w = (1 << met_g);
|
|
c3_w mek_w = ((1 << san_w) - 1);
|
|
c3_w baf_w = (fum_w << met_g);
|
|
c3_w bat_w = (tou_w << met_g);
|
|
|
|
// XX: efficiency: poor. Iterate by words.
|
|
//
|
|
for ( i_w = 0; i_w < wid_w; i_w++ ) {
|
|
c3_w waf_w = (baf_w >> 5);
|
|
c3_g raf_g = (baf_w & 31);
|
|
c3_w wat_w = (bat_w >> 5);
|
|
c3_g rat_g = (bat_w & 31);
|
|
c3_w hop_w;
|
|
|
|
hop_w = (waf_w >= len_w) ? 0 : buf_w[waf_w];
|
|
hop_w = (hop_w >> raf_g) & mek_w;
|
|
|
|
dst_w[wat_w] ^= (hop_w << rat_g);
|
|
|
|
baf_w += san_w;
|
|
bat_w += san_w;
|
|
}
|
|
}
|
|
else {
|
|
c3_g hut_g = (met_g - 5);
|
|
c3_w san_w = (1 << hut_g);
|
|
c3_w j_w;
|
|
|
|
for ( i_w = 0; i_w < wid_w; i_w++ ) {
|
|
c3_w wuf_w = (fum_w + i_w) << hut_g;
|
|
c3_w wut_w = (tou_w + i_w) << hut_g;
|
|
|
|
for ( j_w = 0; j_w < san_w; j_w++ ) {
|
|
dst_w[wut_w + j_w] ^=
|
|
((wuf_w + j_w) >= len_w)
|
|
? 0
|
|
: buf_w[wuf_w + j_w];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* u3r_string(): `a` as malloced C string.
|
|
*/
|
|
c3_c*
|
|
u3r_string(u3_atom a)
|
|
{
|
|
c3_w met_w = u3r_met(3, a);
|
|
c3_c* str_c = c3_malloc(met_w + 1);
|
|
|
|
u3r_bytes(0, met_w, (c3_y*)str_c, a);
|
|
str_c[met_w] = 0;
|
|
return str_c;
|
|
}
|
|
|
|
/* u3r_tape(): `a`, a list of bytes, as malloced C string.
|
|
*/
|
|
c3_y*
|
|
u3r_tape(u3_noun a)
|
|
{
|
|
u3_noun b;
|
|
c3_w i_w;
|
|
c3_y *a_y;
|
|
|
|
for ( i_w = 0, b=a; c3y == u3a_is_cell(b); i_w++, b=u3a_t(b) )
|
|
;
|
|
a_y = c3_malloc(i_w + 1);
|
|
|
|
for ( i_w = 0, b=a; c3y == u3a_is_cell(b); i_w++, b=u3a_t(b) ) {
|
|
a_y[i_w] = u3a_h(b);
|
|
}
|
|
a_y[i_w] = 0;
|
|
|
|
return a_y;
|
|
}
|
|
|
|
/* u3r_mug_bytes(): Compute the mug of `buf`, `len`, LSW first.
|
|
*/
|
|
c3_w
|
|
u3r_mug_bytes(const c3_y *buf_y,
|
|
c3_w len_w)
|
|
{
|
|
c3_w syd_w = 0xcafebabe;
|
|
c3_w ham_w = 0;
|
|
|
|
while ( 0 == ham_w ) {
|
|
c3_w haz_w;
|
|
MurmurHash3_x86_32(buf_y, len_w, syd_w, &haz_w);
|
|
ham_w = (haz_w >> 31) ^ (haz_w & 0x7fffffff);
|
|
syd_w++;
|
|
}
|
|
|
|
return ham_w;
|
|
}
|
|
|
|
/* u3r_mug_chub(): Compute the mug of `num`, LSW first.
|
|
*/
|
|
c3_w
|
|
u3r_mug_chub(c3_d num_d)
|
|
{
|
|
c3_w buf_w[2];
|
|
|
|
buf_w[0] = (c3_w)(num_d & 0xffffffffULL);
|
|
buf_w[1] = (c3_w)(num_d >> 32ULL);
|
|
|
|
return u3r_mug_words(buf_w, 2);
|
|
}
|
|
|
|
/* u3r_mug_string(): Compute the mug of `a`, LSB first.
|
|
*/
|
|
c3_w
|
|
u3r_mug_string(const c3_c *a_c)
|
|
{
|
|
return u3r_mug_bytes((c3_y*)a_c, strlen(a_c));
|
|
}
|
|
|
|
/* u3r_mug_words(): 31-bit nonzero MurmurHash3 on raw words.
|
|
*/
|
|
c3_w
|
|
u3r_mug_words(const c3_w* key_w, c3_w len_w)
|
|
{
|
|
c3_w byt_w = 0;
|
|
c3_w wor_w;
|
|
|
|
while ( 0 < len_w ) {
|
|
wor_w = key_w[--len_w];
|
|
byt_w += _(u3a_is_cat(wor_w)) ? u3r_met(3, wor_w) : 4;
|
|
}
|
|
|
|
return u3r_mug_bytes((c3_y*)key_w, byt_w);
|
|
}
|
|
|
|
/* u3r_mug_both(): Join two mugs.
|
|
*/
|
|
c3_w
|
|
u3r_mug_both(c3_w lef_w, c3_w rit_w)
|
|
{
|
|
c3_w ham_w = lef_w ^ (0x7fffffff ^ rit_w);
|
|
|
|
return u3r_mug_words(&ham_w, (0 == ham_w) ? 0 : 1);
|
|
}
|
|
|
|
/* u3r_mug_cell(): Compute the mug of the cell `[hed tel]`.
|
|
*/
|
|
c3_w
|
|
u3r_mug_cell(u3_noun hed,
|
|
u3_noun tel)
|
|
{
|
|
c3_w lus_w = u3r_mug(hed);
|
|
c3_w biq_w = u3r_mug(tel);
|
|
|
|
return u3r_mug_both(lus_w, biq_w);
|
|
}
|
|
|
|
// mugframe: head and tail mugs of veb, 0 if uncalculated
|
|
//
|
|
typedef struct mugframe
|
|
{
|
|
u3_noun veb;
|
|
c3_w a;
|
|
c3_w b;
|
|
} mugframe;
|
|
|
|
static inline mugframe*
|
|
_mug_push(c3_ys mov, c3_ys off, u3_noun veb)
|
|
{
|
|
u3R->cap_p += mov;
|
|
|
|
// ensure we haven't overflowed the stack
|
|
// (off==0 means we're on a north road)
|
|
//
|
|
if ( 0 == off ) {
|
|
c3_assert(u3R->cap_p > u3R->hat_p);
|
|
}
|
|
else {
|
|
c3_assert(u3R->cap_p < u3R->hat_p);
|
|
}
|
|
|
|
mugframe* cur = u3to(mugframe, u3R->cap_p + off);
|
|
cur->veb = veb;
|
|
cur->a = 0;
|
|
cur->b = 0;
|
|
return cur;
|
|
}
|
|
|
|
static inline mugframe*
|
|
_mug_pop(c3_ys mov, c3_ys off, c3_w mug_w)
|
|
{
|
|
u3R->cap_p -= mov;
|
|
mugframe* fam = u3to(mugframe, u3R->cap_p + off);
|
|
|
|
// the bottom of the stack
|
|
//
|
|
if ( u3_none == fam->veb ) {
|
|
return fam;
|
|
}
|
|
|
|
// place return value in head of previous frame if not already calculated
|
|
//
|
|
if ( 0 == fam->a ) {
|
|
fam->a = mug_w;
|
|
}
|
|
// otherwise, place the return value in the tail
|
|
//
|
|
else if ( 0 == fam->b ) {
|
|
fam->b = mug_w;
|
|
}
|
|
// shouldn't reach
|
|
//
|
|
else {
|
|
c3_assert(0);
|
|
}
|
|
return fam;
|
|
}
|
|
|
|
// _mug_cat(): return the mug of a direct atom
|
|
//
|
|
static c3_w
|
|
_mug_cat(u3_atom veb)
|
|
{
|
|
c3_w len_w = u3r_met(3, veb);
|
|
return u3r_mug_bytes((c3_y*)&veb, len_w);
|
|
}
|
|
|
|
/* _mug_pug(): statefully mug an indirect atom
|
|
*/
|
|
static c3_w
|
|
_mug_pug(u3_atom veb)
|
|
{
|
|
u3a_atom* vat_u = (u3a_atom*)(u3a_to_ptr(veb));
|
|
c3_w len_w = u3r_met(3, veb);
|
|
|
|
c3_w mug_w = u3r_mug_bytes((c3_y*)vat_u->buf_w, len_w);
|
|
vat_u->mug_w = mug_w;
|
|
return mug_w;
|
|
}
|
|
|
|
/* _mug_atom(): mug an atom, either direct or indirect
|
|
*/
|
|
static c3_w
|
|
_mug_atom(u3_atom veb)
|
|
{
|
|
if ( _(u3a_is_cat(veb)) ) {
|
|
return _mug_cat(veb);
|
|
}
|
|
else {
|
|
return _mug_pug(veb);
|
|
}
|
|
}
|
|
|
|
// u3r_mug(): statefully mug a noun using a 31-bit MurmurHash3
|
|
//
|
|
c3_w
|
|
u3r_mug(u3_noun veb)
|
|
{
|
|
c3_assert( u3_none != veb );
|
|
|
|
if ( _(u3a_is_atom(veb)) ) {
|
|
return _mug_atom(veb);
|
|
}
|
|
|
|
c3_y wis_y = c3_wiseof(mugframe);
|
|
c3_o nor_o = u3a_is_north(u3R);
|
|
c3_ys mov = ( c3y == nor_o ? -wis_y : wis_y );
|
|
c3_ys off = ( c3y == nor_o ? 0 : -wis_y );
|
|
|
|
// stash the current stack pointer
|
|
//
|
|
u3p(mugframe) empty = u3R->cap_p;
|
|
// set the bottom of our stack
|
|
//
|
|
mugframe* don = _mug_push(mov, off, u3_none);
|
|
mugframe* fam = _mug_push(mov, off, veb);
|
|
|
|
c3_w mug_w;
|
|
c3_w a;
|
|
c3_w b;
|
|
u3a_noun* veb_u;
|
|
u3_noun hed, tal;
|
|
|
|
while ( don != fam ) {
|
|
a = fam->a;
|
|
b = fam->b;
|
|
veb = fam->veb;
|
|
veb_u = u3a_to_ptr(veb);
|
|
c3_assert(_(u3a_is_cell(veb)));
|
|
|
|
// already mugged; pop stack
|
|
//
|
|
if ( veb_u->mug_w ) {
|
|
mug_w = veb_u->mug_w;
|
|
fam = _mug_pop(mov, off, mug_w);
|
|
}
|
|
// neither head nor tail are mugged; start with head
|
|
//
|
|
else if ( 0 == a ) {
|
|
hed = u3h(veb);
|
|
if ( _(u3a_is_atom(hed)) ) {
|
|
fam->a = _mug_atom(hed);
|
|
}
|
|
else {
|
|
fam = _mug_push(mov, off, hed);
|
|
}
|
|
}
|
|
// head is mugged, but not tail; mug tail or push tail onto stack
|
|
//
|
|
else if ( 0 == b ) {
|
|
tal = u3t(veb);
|
|
if ( _(u3a_is_atom(tal)) ) {
|
|
fam->b = _mug_atom(tal);
|
|
}
|
|
else {
|
|
fam = _mug_push(mov, off, tal);
|
|
}
|
|
}
|
|
// both head and tail are mugged; combine them and pop stack
|
|
//
|
|
else {
|
|
mug_w = u3r_mug_both(a, b);
|
|
veb_u->mug_w = mug_w;
|
|
fam = _mug_pop(mov, off, mug_w);
|
|
}
|
|
}
|
|
|
|
u3R->cap_p = empty;
|
|
return mug_w;
|
|
}
|