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urbit/f/loom.c
~hatteb-mitlyd 309f4b31fd try to raise limits
2014-03-29 12:35:40 -07:00

1779 lines
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/* f/loom.c
**
** This file is in the public domain.
*/
#include "all.h"
#include <sys/uio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sigsegv.h>
#include <termios.h>
#include <uv.h>
#include "v/vere.h"
/* _loom_stop(): signal handler to stop computation.
*/
static void
_loom_stop(c3_i sig)
{
}
static c3_i
_loom_sigsegv_handler(void* adr_v, c3_i ser_i)
{
if ( ser_i ) {
c3_w* bas_w = (c3_w*)(void *)(U2_OS_LoomBase);
c3_w off_w = (((c3_c*) adr_v) - (c3_c*)U2_OS_LoomBase) >> 2;
c3_w pag_w = off_w >> LoomPageWords;
c3_w win_w;
u2_cheg* ceg_u;
if ( pag_w > LoomAllPages ) {
fprintf(stderr, "address %p out of loom!\r\n", adr_v);
return 0;
}
c3_assert((u2_page_neat == LoomChem[pag_w].lif_e) ||
(u2_page_none == LoomChem[pag_w].lif_e) );
LoomChem[pag_w].lif_e = u2_page_tref;
LoomChem[pag_w].mug_e = 0;
for ( ceg_u = &LoomSegmentA; ceg_u; ceg_u = ceg_u->nex_u ) {
if ( (pag_w >= ceg_u->bot_w) &&
(win_w=(pag_w - ceg_u->bot_w)) < ceg_u->len_w )
{
if ( win_w >= ceg_u->pgs_w ) {
ceg_u->pgs_w = win_w + 1;
}
break;
}
}
if ( 0 == ceg_u ) {
fprintf(stderr, "page %d is not in a segment!\n", pag_w);
return 1;
}
if ( -1 == mprotect((void *)(bas_w + (pag_w << LoomPageWords)),
(1 << (LoomPageWords + 2)),
(PROT_READ | PROT_WRITE)) )
{
perror("mprotect");
exit(1);
}
return 1;
}
return 0;
}
/* _loom_read(): full blocking read.
*/
static u2_bean
_loom_read(c3_i fid_i, void* buf_w, c3_w len_w)
{
return ((4 * len_w) == read(fid_i, buf_w, (4 * len_w))) ? u2_yes : u2_no;
}
/* _loom_write(): full blocking write.
*/
static u2_bean
_loom_write(c3_i fid_i, void* buf_w, c3_w len_w)
{
if ((4 * len_w) != write(fid_i, buf_w, (4 * len_w))) {
fprintf(stderr, "couldn't write %d\n", fid_i);
perror("huh?");
exit(1);
}
else {
return u2_yes;
}
// return ((4 * len_w) == write(fid_i, buf_w, (4 * len_w))) ? u2_yes : u2_no;
}
/* u2_loom_clip():
**
** Clip top and bottom.
*/
void
u2_loom_clip(c3_w bot_w, c3_w top_w)
{
}
/* _loom_deploy(): load and attempt to validate.
*/
static u2_bean
_loom_deploy(void)
{
u2_cheg* ceg_u;
c3_w num_w = 0;
for ( ceg_u = &LoomSegmentA; ceg_u; ceg_u = ceg_u->nex_u ) {
u2_chef chf_u;
c3_w i_w;
/* Load control segment.
*/
{
if ( u2_no == _loom_read(ceg_u->ctl_i, &chf_u, c3_wiseof(chf_u)) ) {
printf("deploy no a\n");
return u2_no;
}
c3_assert(chf_u.bot_w == ceg_u->bot_w);
if ( u2_no == _loom_read(ceg_u->ctl_i,
(u2_chit*) &LoomChem[ceg_u->bot_w],
chf_u.pgs_w) )
{
printf("deploy no b\n");
return u2_no;
}
ceg_u->pgs_w = chf_u.pgs_w;
}
/* Load data segment.
*/
{
c3_w liv_w = chf_u.pgs_w;
c3_w res_w = (ceg_u->len_w - liv_w);
c3_w* vil_w = ((c3_w*)U2_OS_LoomBase) + (ceg_u->bot_w << LoomPageWords);
c3_w* den_w = (vil_w + (liv_w << LoomPageWords));
if ( liv_w ) {
if ( -1 == (c3_ps)mmap(vil_w,
(liv_w << (LoomPageWords + 2)),
PROT_READ,
(MAP_FIXED | MAP_PRIVATE),
ceg_u->dat_i, 0) )
{
printf("deploy no c\n");
return u2_no;
}
}
if ( res_w ) {
if ( -1 == (c3_ps)mmap(den_w,
res_w << (LoomPageWords + 2),
PROT_READ,
(MAP_ANON | MAP_FIXED | MAP_PRIVATE),
-1, 0) )
{
printf("deploy no d\n");
return u2_no;
}
}
}
/* Validate with little checksum.
*/
for ( i_w = 0; i_w < chf_u.pgs_w; i_w++ ) {
c3_w pag_w = (i_w + ceg_u->bot_w);
c3_w* gaw_w = ((c3_w*)U2_OS_LoomBase) + (pag_w << LoomPageWords);
if ( u2_page_none == LoomChem[pag_w].lif_e ) {
continue;
}
num_w++;
if ( u2_page_neat != LoomChem[pag_w].lif_e ) {
printf("deploy no e\n");
return u2_no;
}
if ( (0x3fffffff & u2_mug_words(gaw_w, (1 << LoomPageWords))) !=
LoomChem[pag_w].mug_e )
{
printf("mismatched mug at page %d\n", pag_w);
printf("actual data: %x\n",
(0x3fffffff & u2_mug_words(gaw_w, (1 << LoomPageWords))));
printf("control mug: %x\n", LoomChem[pag_w].mug_e);
printf("deploy no f\n");
return u2_no;
}
}
#if 0
fprintf(stderr, "load: %s bot_w %x, pgs_w %d, num_w %d\n",
ceg_u->nam_c, chf_u.bot_w, chf_u.pgs_w, num_w);
#endif
}
printf("loom: loaded %dMB\n", (num_w >> 6));
return u2_yes;
}
/* u2_loom_exit(): return checkpoint files to their natural size.
*/
void
u2_loom_exit(void)
{
u2_cheg* ceg_u;
for ( ceg_u = &LoomSegmentA; ceg_u; ceg_u = ceg_u->nex_u ) {
ftruncate(ceg_u->dat_i, (ceg_u->pgs_w << (LoomPageWords + 2)));
}
}
/* u2_loom_save(): checkpoint at current date, with hat and mat.
*/
u2_bean
u2_loom_save(c3_w ent_w)
{
u2_cheg* ceg_u;
c3_w tot_w = 0;
// uL(fprintf(uH, "# saving at event %u...\n", ent_w));
u2_wr_check_save();
for ( ceg_u = &LoomSegmentA; ceg_u; ceg_u = ceg_u->nex_u ) {
u2_chef chf_u;
c3_w i_w;
c3_w num_w = 0;
chf_u.ent_w = ent_w;
chf_u.ven_w = LoomVersion;
chf_u.bot_w = ceg_u->bot_w;
chf_u.pgs_w = ceg_u->pgs_w;
/* Save data.
*/
{
for ( i_w = 0; i_w < ceg_u->pgs_w; i_w++ ) {
c3_w pag_w = ceg_u->bot_w + i_w;
c3_w* mem_w = ((c3_w*)U2_OS_LoomBase) + (pag_w << LoomPageWords);
if ( u2_page_tref == LoomChem[pag_w].lif_e ) {
lseek(ceg_u->dat_i, (i_w << (LoomPageWords + 2)), SEEK_SET);
if ( u2_no == _loom_write(ceg_u->dat_i,
mem_w,
(1 << LoomPageWords)) ) {
fprintf(stderr, "save no a\r\n");
return u2_no;
}
LoomChem[pag_w].mug_e = u2_mug_words(mem_w, (1 << LoomPageWords));
LoomChem[pag_w].lif_e = u2_page_neat;
num_w++;
}
}
// ftruncate(ceg_u->dat_i, (ceg_u->pgs_w << (LoomPageWords + 2)));
}
#if 0
fprintf(stderr, "save: %s bot_w %x, pgs_w %d, num_w %d\r\n",
ceg_u->nam_c, chf_u.bot_w, chf_u.pgs_w, num_w);
#endif
/* Save control file.
*/
lseek(ceg_u->ctl_i, 0, SEEK_SET);
if ( u2_no == _loom_write(ceg_u->ctl_i, (c3_w*)&chf_u, c3_wiseof(chf_u)) ) {
fprintf(stderr, "save no b\r\n");
return u2_no;
}
if ( u2_no == _loom_write(ceg_u->ctl_i,
(u2_chit*)(LoomChem + ceg_u->bot_w),
ceg_u->pgs_w) ) {
fprintf(stderr, "save no c\r\n");
return u2_no;
}
/* Catch future changes.
*/
if ( -1 == mprotect(((c3_w*)U2_OS_LoomBase) +
(ceg_u->bot_w << LoomPageWords),
(ceg_u->len_w << (LoomPageWords + 2)),
PROT_READ) )
{
fprintf(stderr, "save no d\r\n");
return u2_no;
}
for ( i_w = 0; i_w < ceg_u->len_w; i_w++ ) {
LoomChem[i_w + ceg_u->bot_w].lif_e = u2_page_neat;
}
tot_w += num_w;
}
/* sync the mfer
*/
for ( ceg_u = &LoomSegmentA; ceg_u; ceg_u = ceg_u->nex_u ) {
#if defined(U2_OS_linux)
fdatasync(ceg_u->ctl_i);
fdatasync(ceg_u->dat_i);
#elif defined(U2_OS_osx)
fcntl(ceg_u->ctl_i, F_FULLFSYNC);
fcntl(ceg_u->dat_i, F_FULLFSYNC);
#elif defined(U2_OS_bsd)
fsync(ceg_u->ctl_i);
fsync(ceg_u->dat_i);
#else
#error "port: datasync"
#endif
}
#if 0
uL(fprintf(uH, "loom: wrote %uMB\n", (tot_w >> 6)));
#endif
return u2_yes;
}
/* _loom_start(): set up interrupts, etc.
*/
static void
_loom_start(void)
{
if ( 0 != sigsegv_install_handler(_loom_sigsegv_handler) ) {
fprintf(stderr, "sigsegv install failed\n");
exit(1);
}
{
struct rlimit rlm;
#define LOOM_STACK (65536 << 10)
getrlimit(RLIMIT_STACK, &rlm);
rlm.rlim_cur = rlm.rlim_max > LOOM_STACK ? LOOM_STACK : rlm.rlim_max;
if ( 0 != setrlimit(RLIMIT_STACK, &rlm) ) {
perror("stack");
exit(1);
}
#undef LOOM_STACK
getrlimit(RLIMIT_NOFILE, &rlm);
rlm.rlim_cur = 4096;
if ( 0 != setrlimit(RLIMIT_NOFILE, &rlm) ) {
perror("file limit");
// no exit, not a critical limit
}
getrlimit(RLIMIT_CORE, &rlm);
rlm.rlim_cur = RLIM_INFINITY;
if ( 0 != setrlimit(RLIMIT_CORE, &rlm) ) {
perror("core limit");
// no exit, not a critical limit
}
}
signal(SIGINT, _loom_stop);
}
/* u2_loom_load():
**
** Try to load the loom from a checkpoint.
*/
u2_bean
u2_loom_load(void)
{
if ( u2_yes == _loom_deploy() ) {
_loom_start();
return u2_yes;
}
else {
munmap((c3_w*)U2_OS_LoomBase, (LoomAllPages << (LoomPageWords + 2)));
return u2_no;
}
}
/* u2_loom_boot():
**
** Instantiate the loom.
*/
void
u2_loom_boot(void)
{
void *map;
map = mmap((void *)U2_OS_LoomBase,
(HalfSize << 3),
PROT_READ,
(MAP_ANON | MAP_FIXED | MAP_PRIVATE),
-1, 0);
if ( -1 == (c3_ps)map ) {
map = mmap((void *)0,
(HalfSize << 3),
PROT_READ,
MAP_ANON | MAP_PRIVATE,
-1, 0);
if ( -1 == (c3_ps)map ) {
fprintf(stderr, "map failed twice\n");
} else {
fprintf(stderr, "map failed - try U2_OS_LoomBase %p\n", map);
}
exit(1);
}
printf("loom: mapped %dMB\n", (1 << (LoomBits - 18)));
_loom_start();
}
/* u2_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;
u2_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 = c3_false;
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 == c3_false) && (3 == u2_ax_cap(axe_w)) ) {
cut_t = c3_true;
cut_w = i_w;
}
prs_m[i_w].axe_w = u2_ax_mas(axe_w);
}
return cut_t ? cut_w : i_w;
}
static u2_bean
_mean_extract(u2_noun som,
c3_w len_w,
struct _mean_pair* prs_m)
{
if ( len_w == 0 ) {
return u2_yes;
}
else if ( (len_w == 1) && (1 == prs_m[0].axe_w) ) {
*prs_m->som = som;
return u2_yes;
}
else {
if ( u2_no == u2_dust(som) ) {
return u2_no;
} else {
c3_w cut_w = _mean_cut(len_w, prs_m);
return u2_and
(_mean_extract(u2_h(som), cut_w, prs_m),
_mean_extract(u2_t(som), (len_w - cut_w), (prs_m + cut_w)));
}
}
}
u2_bean
u2_mean(u2_noun som,
...)
{
va_list ap;
c3_w len_w;
struct _mean_pair* prs_m;
c3_assert(u2_none != som);
/* Count.
*/
len_w = 0;
{
va_start(ap, som);
while ( 1 ) {
if ( 0 == va_arg(ap, c3_w) ) {
break;
}
va_arg(ap, u2_noun*);
len_w++;
}
va_end(ap);
}
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, u2_noun*);
}
va_end(ap);
}
/* Extract.
*/
return _mean_extract(som, len_w, prs_m);
}
/* _frag_word(): fast fragment/branch prediction for top word.
*/
static u2_weak
_frag_word(c3_w a_w, u2_noun b)
{
c3_assert(0 != a_w);
{
c3_w dep_w = u2_ax_dep(a_w);
while ( dep_w ) {
if ( u2_no == u2_dust(b) ) {
return u2_none;
}
else {
c3_w x = (1 & (a_w >> (dep_w - 1)));
b = *u2_at_ray(1 + x + u2_pom_a(b));
dep_w--;
}
}
return b;
}
}
/* _frag_deep(): fast fragment/branch for deep words.
*/
static u2_weak
_frag_deep(c3_w a_w, u2_noun b)
{
c3_w dep_w = 32;
while ( dep_w ) {
if ( u2_no == u2_dust(b) ) {
return u2_none;
}
else {
c3_w x = (1 & (a_w >> (dep_w - 1)));
b = *u2_at_ray(1 + x + u2_pom_a(b));
dep_w--;
}
}
return b;
}
/* _frag_phat(): fragment for fat.
*/
static u2_weak
_frag_phat(u2_noun a, u2_noun b)
{
c3_w len_w = *u2_at_pug_len(a);
b = _frag_word(*u2_at_pug_buf(a, (len_w - 1)), b);
len_w -= 1;
while ( len_w ) {
b = _frag_deep(*u2_at_pug_buf(a, (len_w - 1)), b);
if ( u2_none == b ) {
return b;
} else {
len_w--;
}
}
return b;
}
/* u2_frag():
**
** Return fragment (a) of (b), or u2_none if not applicable.
*/
u2_weak
u2_frag(u2_atom a,
u2_noun b)
{
c3_assert(u2_none != a);
c3_assert(u2_none != b);
if ( _0 == a ) {
return u2_none;
}
if ( u2_fly_is_cat(a) ) {
return _frag_word(a, b);
}
else {
if ( !u2_dog_is_pug(a) ) {
return u2_none;
}
else {
return _frag_phat(a, b);
#if 0
c3_w fol_w = (u2_met(0, a) - 1);
c3_w i_w;
mpz_t a_mp;
c3_assert(u2_none != b);
u2_mp(a_mp, a);
for ( i_w=0; i_w < fol_w; i_w++ ) {
c3_w lum_w = (fol_w - (i_w + 1));
if ( u2_no == u2_dust(b) ) {
mpz_clear(a_mp);
return u2_none;
}
else {
if ( (mpz_tstbit(a_mp, lum_w) == 0) ) {
b = u2_h(b);
} else {
b = u2_t(b);
}
}
}
mpz_clear(a_mp);
return b;
#endif
}
}
}
/* u2_mug():
**
** Compute and/or recall the mug (31-bit FNV1a hash) of (a).
*/
static __inline__ c3_w
_mug_fnv(c3_w has_w)
{
return (has_w * ((c3_w)16777619));
}
static __inline__ c3_w
_mug_out(c3_w has_w)
{
return (has_w >> 31) ^ (has_w & 0x7fffffff);
}
static __inline__ c3_w
_mug_both(c3_w lef_w, c3_w rit_w)
{
c3_w bot_w = _mug_fnv(lef_w ^ _mug_fnv(rit_w));
c3_w out_w = _mug_out(bot_w);
if ( 0 != out_w ) {
return out_w;
}
else {
return _mug_both(lef_w, ++rit_w);
}
}
c3_w
u2_mug_both(c3_w lef_w, c3_w rit_w)
{
return _mug_both(lef_w, rit_w);
}
static __inline__ c3_w
_mug_bytes_in(c3_w off_w, c3_w nby_w, c3_y* byt_y)
{
c3_w i_w;
for ( i_w = 0; i_w < nby_w; i_w++ ) {
off_w = _mug_fnv(off_w ^ byt_y[i_w]);
}
return off_w;
}
static c3_w
_mug_bytes(c3_w off_w, c3_w nby_w, c3_y* byt_y)
{
c3_w has_w = _mug_bytes_in(off_w, nby_w, byt_y);
c3_w out_w = _mug_out(has_w);
if ( 0 != out_w ) {
return out_w;
}
else {
return _mug_bytes(++off_w, nby_w, byt_y);
}
}
static __inline__ c3_w
_mug_words_in_buf(c3_w off_w, c3_w nwd_w, u2_noun veb)
{
if ( 0 == nwd_w ) {
return off_w;
} else {
c3_w i_w, x_w;
for ( i_w = 0; i_w < (nwd_w - 1); i_w++ ) {
x_w = *u2_at_pug_buf(veb, i_w);
{
c3_y a_y = (x_w & 0xff);
c3_y b_y = ((x_w >> 8) & 0xff);
c3_y c_y = ((x_w >> 16) & 0xff);
c3_y d_y = ((x_w >> 24) & 0xff);
off_w = _mug_fnv(off_w ^ a_y);
off_w = _mug_fnv(off_w ^ b_y);
off_w = _mug_fnv(off_w ^ c_y);
off_w = _mug_fnv(off_w ^ d_y);
}
}
x_w = *u2_at_pug_buf(veb, (nwd_w - 1));
if ( x_w ) {
off_w = _mug_fnv(off_w ^ (x_w & 0xff));
x_w >>= 8;
if ( x_w ) {
off_w = _mug_fnv(off_w ^ (x_w & 0xff));
x_w >>= 8;
if ( x_w ) {
off_w = _mug_fnv(off_w ^ (x_w & 0xff));
x_w >>= 8;
if ( x_w ) {
off_w = _mug_fnv(off_w ^ (x_w & 0xff));
}
}
}
}
}
return off_w;
}
static __inline__ c3_w
_mug_words_in(c3_w off_w, c3_w nwd_w, const c3_w* wod_w)
{
if ( 0 == nwd_w ) {
return off_w;
} else {
c3_w i_w, x_w;
for ( i_w = 0; i_w < (nwd_w - 1); i_w++ ) {
x_w = wod_w[i_w];
{
c3_y a_y = (x_w & 0xff);
c3_y b_y = ((x_w >> 8) & 0xff);
c3_y c_y = ((x_w >> 16) & 0xff);
c3_y d_y = ((x_w >> 24) & 0xff);
off_w = _mug_fnv(off_w ^ a_y);
off_w = _mug_fnv(off_w ^ b_y);
off_w = _mug_fnv(off_w ^ c_y);
off_w = _mug_fnv(off_w ^ d_y);
}
}
x_w = wod_w[nwd_w - 1];
if ( x_w ) {
off_w = _mug_fnv(off_w ^ (x_w & 0xff));
x_w >>= 8;
if ( x_w ) {
off_w = _mug_fnv(off_w ^ (x_w & 0xff));
x_w >>= 8;
if ( x_w ) {
off_w = _mug_fnv(off_w ^ (x_w & 0xff));
x_w >>= 8;
if ( x_w ) {
off_w = _mug_fnv(off_w ^ (x_w & 0xff));
}
}
}
}
}
return off_w;
}
static c3_w
_mug_words(c3_w off_w, c3_w nwd_w, const c3_w* wod_w)
{
c3_w has_w = _mug_words_in(off_w, nwd_w, wod_w);
c3_w out_w = _mug_out(has_w);
if ( 0 != out_w ) {
return out_w;
}
else {
return _mug_words(++off_w, nwd_w, wod_w);
}
}
static c3_w
_mug_words_buf(c3_w off_w, c3_w nwd_w, u2_noun veb)
{
c3_w has_w = _mug_words_in_buf(off_w, nwd_w, veb);
c3_w out_w = _mug_out(has_w);
if ( 0 != out_w ) {
return out_w;
}
else {
return _mug_words_buf(++off_w, nwd_w, veb);
}
}
c3_w
u2_mug(u2_noun veb)
{
c3_assert(u2_none != veb);
if ( u2_fly_is_cat(veb) ) {
c3_w x_w = veb;
return _mug_words(2166136261, (veb ? 1 : 0), &x_w);
} else {
if ( *u2_at_dog_mug(veb) ) {
c3_w mug_w = *u2_at_dog_mug(veb);
return mug_w;
}
else {
c3_w mug_w;
if ( u2_dog_is_pom(veb) ) {
u2_noun hed = *u2_at_pom_hed(veb);
u2_noun tel = *u2_at_pom_tel(veb);
mug_w = u2_mug_cell(hed, tel);
}
else {
c3_w len_w = *u2_at_pug_len(veb);
mug_w = _mug_words_buf(2166136261, len_w, veb);
}
*u2_at_dog_mug(veb) = mug_w;
return mug_w;
}
}
}
/* u2_mug_words():
**
** Compute the mug of `buf`, `len`, LSW first.
*/
c3_w
u2_mug_words(const c3_w *buf_w,
c3_w len_w)
{
return _mug_words(2166136261, len_w, buf_w);
}
/* u2_mug_string():
**
** Compute the mug of `a`, LSB first.
*/
c3_w
u2_mug_string(const c3_c *a_c)
{
return _mug_bytes(2166136261, strlen(a_c), (c3_y *)a_c);
}
/* u2_mug_cell():
**
** Compute the mug of the cell `[hed tel]`.
*/
c3_w
u2_mug_cell(u2_noun hed,
u2_noun tel)
{
c3_w lus_w = u2_mug(hed);
c3_w biq_w = u2_mug(tel);
return u2_mug_both(lus_w, biq_w);
}
/* u2_mug_trel():
**
** Compute the mug of `[a b c]`.
*/
c3_w
u2_mug_trel(u2_noun a,
u2_noun b,
u2_noun c)
{
return u2_mug_both(u2_mug(a), u2_mug_both(u2_mug(b), u2_mug(c)));
}
/* u2_mug_qual():
**
** Compute the mug of `[a b c d]`.
*/
c3_w
u2_mug_qual(u2_noun a,
u2_noun b,
u2_noun c,
u2_noun d)
{
return u2_mug_both(u2_mug(a),
u2_mug_both(u2_mug(b),
u2_mug_both(u2_mug(c), u2_mug(d))));
}
#ifdef U2_PROFILE
c3_w X; // XX not thread-safe
c3_w FUN;
#endif
/* _sing_x():
**
** Yes iff (a) and (b) are the same noun.
*/
static u2_bean
_sing_x(u2_noun a,
u2_noun b)
{
c3_assert(u2_none != a);
c3_assert(u2_none != b);
if ( a == b ) {
return u2_yes;
}
else {
#ifdef U2_PROFILE
X++;
#endif
if ( u2_fly_is_atom(a) ) {
if ( !u2_fly_is_atom(b) ||
u2_fly_is_cat(a) ||
u2_fly_is_cat(b) )
{
return u2_no;
}
else {
if ( *u2_at_dog_mug(a) &&
*u2_at_dog_mug(b) &&
(*u2_at_dog_mug(a) != *u2_at_dog_mug(b)) )
{
return u2_no;
}
else {
c3_w w_rez = *u2_at_pug_len(a);
c3_w w_mox = *u2_at_pug_len(b);
if ( w_rez != w_mox ) {
return u2_no;
}
else {
c3_w i_w;
for ( i_w = 0; i_w < w_rez; i_w++ ) {
if ( (*u2_at_pug_buf(a, i_w)) !=
(*u2_at_pug_buf(b, i_w)) )
{
return u2_no;
}
}
return u2_yes;
}
}
}
}
else {
if ( u2_fly_is_atom(b) ) {
return u2_no;
}
else {
if ( *u2_at_dog_mug(a) &&
*u2_at_dog_mug(b) &&
(*u2_at_dog_mug(a) != *u2_at_dog_mug(b)) )
{
return u2_no;
}
else {
if ( u2_no == _sing_x(u2_h(a), u2_h(b)) ) {
return u2_no;
}
else if ( u2_no == _sing_x(u2_t(a), u2_t(b)) ) {
return u2_no;
}
#if 0
if ( *u2_at_dog_mug(a) && *u2_at_dog_mug(b) ) {
fprintf(stderr, "duplicate %x %x\r\n", a, b);
}
#endif
return u2_yes;
}
}
}
}
}
#ifdef U2_PROFILE
#if 0
/* _weight(): count subordinate nouns.
*/
static c3_w
_weight(u2_noun n)
{
if ( u2_yes == u2_stud(n) ) {
return 1;
} else {
return _weight(u2_h(n)) + _weight(u2_t(n));
}
}
#endif
#endif
/* u2_sing():
**
** Yes iff (a) and (b) are the same noun.
*/
u2_bean
u2_sing(u2_noun a,
u2_noun b)
{
#ifndef U2_PROFILE
return _sing_x(a, b);
#else
X=0;
{
u2_bean sit = _sing_x(a, b);
if ( (u2_yes == sit) && (a != b) ) {
u2_tx_did_nod(0, X);
}
if ( FUN && (X > 10) ) {
// printf("mug %x, X %d\n", u2_mug(a), X);
// if ( u2_mug(a) == 0xe5c2279 )
// { printf("a %x, b %x\n", a, b); c3_assert(0); }
}
return sit;
}
#endif
}
u2_bean
u2_fing(u2_noun a,
u2_noun b)
{
return (a == b) ? u2_yes : u2_no;
}
/* u2_sing_cell():
**
** Yes iff `[p q]` and `b` are the same noun.
*/
u2_bean
u2_sing_cell(u2_noun p,
u2_noun q,
u2_noun b)
{
return u2_and(u2_dust(b),
u2_and(u2_sing(p, u2_h(b)),
u2_sing(q, u2_t(b))));
}
u2_bean
u2_fing_cell(u2_noun p,
u2_noun q,
u2_noun b)
{
return u2_and(u2_dust(b),
u2_and(u2_fing(p, u2_h(b)),
u2_fing(q, u2_t(b))));
}
/* u2_sing_mixt():
**
** Yes iff `[p q]` and `b` are the same noun.
*/
u2_bean
u2_sing_mixt(const c3_c* p_c,
u2_noun q,
u2_noun b)
{
return u2_and(u2_dust(b),
u2_and(u2_sing_c(p_c, u2_h(b)),
u2_sing(q, u2_t(b))));
}
u2_bean
u2_fing_mixt(const c3_c* p_c,
u2_noun q,
u2_noun b)
{
return u2_and(u2_dust(b),
u2_and(u2_sing_c(p_c, u2_h(b)),
u2_fing(q, u2_t(b))));
}
/* u2_sing_trel():
**
** Yes iff `[p q r]` and `b` are the same noun.
*/
u2_bean
u2_sing_trel(u2_noun p,
u2_noun q,
u2_noun r,
u2_noun b)
{
return u2_and(u2_dust(b),
u2_and(u2_sing(p, u2_h(b)),
u2_sing_cell(q, r, u2_t(b))));
}
u2_bean
u2_fing_trel(u2_noun p,
u2_noun q,
u2_noun r,
u2_noun b)
{
return u2_and(u2_dust(b),
u2_and(u2_fing(p, u2_h(b)),
u2_fing_cell(q, r, u2_t(b))));
}
/* u2_sing_qual():
**
** Yes iff `[p q r]` and `b` are the same noun.
*/
u2_bean
u2_sing_qual(u2_noun p,
u2_noun q,
u2_noun r,
u2_noun s,
u2_noun b)
{
return u2_and(u2_dust(b),
u2_and(u2_sing(p, u2_h(b)),
u2_sing_trel(q, r, s, u2_t(b))));
}
u2_bean
u2_fing_qual(u2_noun p,
u2_noun q,
u2_noun r,
u2_noun s,
u2_noun b)
{
return u2_and(u2_dust(b),
u2_and(u2_fing(p, u2_h(b)),
u2_fing_trel(q, r, s, u2_t(b))));
}
/* u2_nord():
**
** Return 0, 1 or 2 if `a` is below, equal to, or above `b`.
*/
u2_atom
u2_nord(u2_noun a,
u2_noun b)
{
c3_assert(u2_none != a);
c3_assert(u2_none != b);
if ( a == b ) {
return _1;
}
else {
if ( u2_fly_is_atom(a) ) {
if ( !u2_fly_is_atom(b) ) {
return _0;
} else {
if ( u2_fly_is_cat(a) ) {
if ( u2_fly_is_cat(b) ) {
return (a < b) ? 0 : 2;
}
else return 0;
}
else if ( u2_fly_is_cat(b) ) {
return 2;
}
else {
c3_w w_rez = *u2_at_pug_len(a);
c3_w w_mox = *u2_at_pug_len(b);
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 = *u2_at_pug_buf(a, i_w);
c3_w bi_w = *u2_at_pug_buf(b, i_w);
if ( ai_w != bi_w ) {
return (ai_w < bi_w) ? _0 : _2;
}
}
return _1;
}
}
}
} else {
if ( u2_fly_is_atom(b) ) {
return _2;
} else {
u2_atom c = u2_nord(u2_h(a), u2_h(b));
if ( _1 == c ) {
return u2_nord(u2_t(a), u2_t(b));
} else {
return c;
}
}
}
}
}
/* u2_sing_c():
**
** Yes iff (b) is the same noun as the C string a_c.
*/
u2_bean
u2_sing_c(const c3_c* a_c,
u2_noun b)
{
c3_assert(u2_none != b);
if ( !u2_fly_is_atom(b) ) {
return u2_no;
}
else {
c3_w w_sof = strlen(a_c);
c3_w i_w;
for ( i_w = 0; i_w < w_sof; i_w++ ) {
if ( u2_byte(i_w, b) != a_c[i_w] ) {
return u2_no;
}
}
return u2_yes;
}
}
/* u2_as_bush():
**
** Factor [a] as a bush [b.[p q] c].
*/
u2_bean
u2_as_bush(u2_noun a,
u2_noun* b,
u2_noun* c)
{
c3_assert(u2_none != a);
if ( u2_fly_is_atom(a) ) {
return u2_no;
}
else {
*b = u2_h(a);
if ( u2_fly_is_atom(*b) ) {
return u2_no;
} else {
*c = u2_t(a);
return u2_yes;
}
}
}
/* u2_as_cell():
**
** Factor (a) as a cell (b c).
*/
u2_bean
u2_as_cell(u2_noun a,
u2_noun* b,
u2_noun* c)
{
c3_assert(u2_none != a);
if ( u2_fly_is_atom(a) ) {
return u2_no;
}
else {
if ( b ) *b = u2_h(a);
if ( c ) *c = u2_t(a);
return u2_yes;
}
}
/* u2_as_hext():
**
** Factor (a) as a hext (b c d e f g)
*/
u2_bean
u2_as_hext(u2_noun a,
u2_noun* b,
u2_noun* c,
u2_noun* d,
u2_noun* e,
u2_noun* f,
u2_noun* g)
{
u2_noun guf;
if ( (u2_yes == u2_as_cell(a, b, &guf)) &&
(u2_yes == u2_as_quil(guf, c, d, e, f, g)) ) {
return u2_yes;
}
else return u2_no;
}
/* u2_as_p():
**
** & [0] if [a] is of the form [b *c].
*/
u2_bean
u2_as_p(u2_noun a,
u2_noun b,
u2_noun* c)
{
u2_noun feg, nux;
if ( (u2_yes == u2_as_cell(a, &feg, &nux)) &&
(u2_yes == u2_sing(feg, b)) )
{
*c = nux;
return u2_yes;
}
else return u2_no;
}
/* u2_as_pq():
**
** & [0] if [a] is of the form [b *c d].
*/
u2_bean
u2_as_pq(u2_noun a,
u2_noun b,
u2_noun* c,
u2_noun* d)
{
u2_noun nux;
if ( (u2_yes == u2_as_p(a, b, &nux)) &&
(u2_yes == u2_as_cell(nux, c, d)) )
{
return u2_yes;
}
else return u2_no;
}
/* u2_as_pqr():
**
** & [0] if [a] is of the form [b *c *d *e].
*/
u2_bean
u2_as_pqr(u2_noun a,
u2_noun b,
u2_noun* c,
u2_noun* d,
u2_noun* e)
{
u2_noun nux;
if ( (u2_yes == u2_as_p(a, b, &nux)) &&
(u2_yes == u2_as_trel(nux, c, d, e)) )
{
return u2_yes;
}
else return u2_no;
}
/* u2_as_pqrs():
**
** & [0] if [a] is of the form [b *c *d *e *f].
*/
u2_bean
u2_as_pqrs(u2_noun a,
u2_noun b,
u2_noun* c,
u2_noun* d,
u2_noun* e,
u2_noun* f)
{
u2_noun nux;
if ( (u2_yes == u2_as_p(a, b, &nux)) &&
(u2_yes == u2_as_qual(nux, c, d, e, f)) )
{
return u2_yes;
}
else return u2_no;
}
/* u2_as_qual():
**
** Factor (a) as a qual (b c d e).
*/
u2_bean
u2_as_qual(u2_noun a,
u2_noun* b,
u2_noun* c,
u2_noun* d,
u2_noun* e)
{
u2_noun guf;
if ( (u2_yes == u2_as_cell(a, b, &guf)) &&
(u2_yes == u2_as_trel(guf, c, d, e)) ) {
return u2_yes;
}
else return u2_no;
}
/* u2_as_quil():
**
** Factor (a) as a quil (b c d e f).
*/
u2_bean
u2_as_quil(u2_noun a,
u2_noun* b,
u2_noun* c,
u2_noun* d,
u2_noun* e,
u2_noun* f)
{
u2_noun guf;
if ( (u2_yes == u2_as_cell(a, b, &guf)) &&
(u2_yes == u2_as_qual(guf, c, d, e, f)) ) {
return u2_yes;
}
else return u2_no;
}
/* u2_as_trel():
**
** Factor (a) as a trel (b c d).
*/
u2_bean
u2_as_trel(u2_noun a,
u2_noun *b,
u2_noun *c,
u2_noun *d)
{
u2_noun guf;
if ( (u2_yes == u2_as_cell(a, b, &guf)) &&
(u2_yes == u2_as_cell(guf, c, d)) ) {
return u2_yes;
}
else {
return u2_no;
}
}
/* u2_sh():
**
** Return the head of (a), safely.
*/
u2_noun
u2_sh(u2_cell a)
{
return (a == u2_none) && (u2_yes == u2_dust(a)) ? a : u2_h(a);
}
/* u2_st():
**
** Return the tail of (a), safely.
*/
u2_noun
u2_st(u2_noun a)
{
return (a == u2_none) && (u2_yes == u2_dust(a)) ? a : u2_t(a);
}
/* u2_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
u2_met(c3_y a_y,
u2_atom b)
{
c3_assert(u2_none != b);
c3_assert(u2_fly_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 ( u2_fly_is_cat(b) ) {
gal_w = 0;
daz_w = b;
}
else {
gal_w = (*u2_at_pug_len(b)) - 1;
daz_w = (*u2_at_pug_buf(b, 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;
}
}
}
}
/* u2_bit():
**
** Return bit (a_w) of (b).
*/
c3_b
u2_bit(c3_w a_w,
u2_atom b)
{
c3_assert(u2_none != b);
c3_assert(u2_fly_is_atom(b));
if ( u2_fly_is_cat(b) ) {
if ( a_w >= 31 ) {
return 0;
}
else return (1 & (b >> a_w));
}
else {
c3_y vut_y = (a_w & 31);
c3_w pix_w = (a_w >> 5);
if ( pix_w >= *u2_at_pug_len(b) ) {
return 0;
}
else {
c3_w nys_w = *u2_at_pug_buf(b, pix_w);
return (1 & (nys_w >> vut_y));
}
}
}
/* u2_byte():
**
** Return byte (a_w) of (b).
*/
c3_y
u2_byte(c3_w a_w,
u2_atom b)
{
c3_assert(u2_none != b);
c3_assert(u2_fly_is_atom(b));
if ( u2_fly_is_cat(b) ) {
if ( a_w > 3 ) {
return 0;
}
else return (255 & (b >> (a_w << 3)));
}
else {
c3_y vut_y = (a_w & 3);
c3_w pix_w = (a_w >> 2);
if ( pix_w >= *u2_at_pug_len(b) ) {
return 0;
}
else {
c3_w nys_w = *u2_at_pug_buf(b, pix_w);
return (255 & (nys_w >> (vut_y << 3)));
}
}
}
/* u2_bytes():
**
** Copy bytes (a_w) through (a_w + b_w - 1) from (d) to (c).
*/
void
u2_bytes(c3_w a_w,
c3_w b_w,
c3_y* c_y,
u2_atom d)
{
c3_w i_w;
c3_assert(u2_none != d);
/* Efficiency: don't call u2_word().
*/
for ( i_w = 0; i_w < b_w; i_w++ ) {
c_y[i_w] = u2_byte((a_w + i_w), d);
}
}
/* u2_mp():
**
** Copy (b) into (a_mp).
*/
void
u2_mp(mpz_t a_mp,
u2_atom b)
{
c3_assert(u2_none != b);
c3_assert(u2_fly_is_atom(b));
if ( u2_fly_is_cat(b) ) {
mpz_init_set_ui(a_mp, b);
}
else {
c3_w len_w = *u2_at_pug_len(b);
/* 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] = *u2_at_pug_buf(b, i_w);
}
mpz_import(a_mp, len_w, -1, 4, 0, 0, buf_w);
}
}
}
/* u2_word():
**
** Return word (a_w) of (b).
*/
c3_w
u2_word(c3_w a_w,
u2_atom b)
{
c3_assert(u2_none != b);
c3_assert(u2_fly_is_atom(b));
if ( u2_fly_is_cat(b) ) {
if ( a_w > 0 ) {
return 0;
}
else return b;
}
else {
if ( a_w >= *u2_at_pug_len(b) ) {
return 0;
}
else return *u2_at_pug_buf(b, a_w);
}
}
/* u2_chub():
**
** Return double-word (a_w) of (b).
*/
c3_d
u2_chub(c3_w a_w,
u2_atom b)
{
c3_w wlo_w = u2_word(a_w * 2, b);
c3_w whi_w = u2_word(1 + (a_w * 2), b);
return (((uint64_t)whi_w) << 32ULL) | ((uint64_t)wlo_w);
}
/* u2_words():
**
** Copy words (a_w) through (a_w + b_w - 1) from (d) to (c).
*/
void
u2_words(c3_w a_w,
c3_w b_w,
c3_w* c_w,
u2_atom d)
{
c3_w i_w;
c3_assert(u2_none != d);
/* Efficiency: don't call u2_word().
*/
for ( i_w = 0; i_w < b_w; i_w++ ) {
c_w[i_w] = u2_word((a_w + i_w), d);
}
}
/* u2_chop():
**
** Into the bloq space of `met`, from position `fum` for a
** span of `wid`, to position `tou`, XOR from atom `src`
** into ray `dst`.
*/
void
u2_chop(c3_g met_g,
c3_w fum_w,
c3_w wid_w,
c3_w tou_w,
u2_ray dst_r,
u2_atom src)
{
c3_w i_w;
c3_assert(u2_none != src);
c3_assert(u2_fly_is_atom(src));
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 = u2_atom_word(src, waf_w);
hop_w = (hop_w >> raf_g) & mek_w;
*u2_at_ray(dst_r + wat_w) ^= (hop_w << rat_g);
baf_w += san_w;
bat_w += san_w;
}
}
else {
c3_w len_w = (u2_fly_is_cat(src) ? 1 : *u2_at_pug_len(src));
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++ ) {
*u2_at_ray(dst_r + wut_w + j_w) ^=
((wuf_w + j_w) >= len_w)
? 0
: u2_atom_word(src, wuf_w + j_w);
}
}
}
}
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