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serial.c
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/// @file
#include "serial.h"
#include <errno.h>
#include <fcntl.h>
#include "allocate.h"
#include "hashtable.h"
#include "jets/k.h"
#include "jets/q.h"
#include "retrieve.h"
#include "serial.h"
#include "ur.h"
#include "vortex.h"
#include "xtract.h"
const c3_y u3s_dit_y[64] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'-', '~'
};
/* _cs_jam_buf: struct for tracking the fibonacci-allocated jam of a noun
*/
struct _cs_jam_fib {
u3i_slab* sab_u;
u3p(u3h_root) har_p;
c3_w a_w;
c3_w b_w;
c3_w bit_w;
};
/* _cs_jam_fib_grow(): reallocate buffer with fibonacci growth
*/
static void
_cs_jam_fib_grow(struct _cs_jam_fib* fib_u, c3_w mor_w)
{
c3_w wan_w = fib_u->bit_w + mor_w;
// check for c3_w overflow
//
if ( wan_w < mor_w ) {
u3m_bail(c3__fail);
}
if ( wan_w > fib_u->a_w ) {
c3_w c_w = 0;
// fibonacci growth
//
while ( c_w < wan_w ) {
c_w = fib_u->a_w + fib_u->b_w;
fib_u->b_w = fib_u->a_w;
fib_u->a_w = c_w;
}
u3i_slab_grow(fib_u->sab_u, 0, c_w);
}
}
/* _cs_jam_fib_chop(): chop [met_w] bits of [a] into [fib_u]
*/
static void
_cs_jam_fib_chop(struct _cs_jam_fib* fib_u, c3_w met_w, u3_noun a)
{
c3_w bit_w = fib_u->bit_w;
_cs_jam_fib_grow(fib_u, met_w);
fib_u->bit_w += met_w;
{
c3_w* buf_w = fib_u->sab_u->buf_w;
u3r_chop(0, 0, met_w, bit_w, buf_w, a);
}
}
/* _cs_jam_fib_mat(): length-prefixed encode (mat) [a] into [fib_u]
*/
static void
_cs_jam_fib_mat(struct _cs_jam_fib* fib_u, u3_noun a)
{
if ( 0 == a ) {
_cs_jam_fib_chop(fib_u, 1, 1);
}
else {
c3_w a_w = u3r_met(0, a);
c3_w b_w = c3_bits_word(a_w);
_cs_jam_fib_chop(fib_u, b_w+1, 1 << b_w);
_cs_jam_fib_chop(fib_u, b_w-1, a_w & ((1 << (b_w-1)) - 1));
_cs_jam_fib_chop(fib_u, a_w, a);
}
}
/* _cs_jam_fib_atom_cb(): encode atom or backref
*/
static void
_cs_jam_fib_atom_cb(u3_atom a, void* ptr_v)
{
struct _cs_jam_fib* fib_u = ptr_v;
u3_weak b = u3h_git(fib_u->har_p, a);
// if [a] has no backref, encode atom and put cursor into [har_p]
//
if ( u3_none == b ) {
u3h_put(fib_u->har_p, a, u3i_words(1, &(fib_u->bit_w)));
_cs_jam_fib_chop(fib_u, 1, 0);
_cs_jam_fib_mat(fib_u, a);
}
else {
c3_w a_w = u3r_met(0, a);
c3_w b_w = u3r_met(0, b);
// if [a] is smaller than the backref, encode atom
//
if ( a_w <= b_w ) {
_cs_jam_fib_chop(fib_u, 1, 0);
_cs_jam_fib_mat(fib_u, a);
}
// otherwise, encode backref
//
else {
_cs_jam_fib_chop(fib_u, 2, 3);
_cs_jam_fib_mat(fib_u, b);
}
}
}
/* _cs_jam_fib_cell_cb(): encode cell or backref
*/
static c3_o
_cs_jam_fib_cell_cb(u3_noun a, void* ptr_v)
{
struct _cs_jam_fib* fib_u = ptr_v;
u3_weak b = u3h_git(fib_u->har_p, a);
// if [a] has no backref, encode cell and put cursor into [har_p]
//
if ( u3_none == b ) {
u3h_put(fib_u->har_p, a, u3i_words(1, &(fib_u->bit_w)));
_cs_jam_fib_chop(fib_u, 2, 1);
return c3y;
}
// otherwise, encode backref and shortcircuit traversal
//
else {
_cs_jam_fib_chop(fib_u, 2, 3);
_cs_jam_fib_mat(fib_u, b);
return c3n;
}
}
/* u3s_jam_fib(): jam without atom allocation.
**
** returns atom-suitable words, and *bit_w will have
** the length (in bits). return should be freed with u3a_wfree().
*/
c3_w
u3s_jam_fib(u3i_slab* sab_u, u3_noun a)
{
struct _cs_jam_fib fib_u;
fib_u.har_p = u3h_new();
fib_u.sab_u = sab_u;
// fib(12) is small enough to be reasonably fast to allocate.
// fib(11) is needed to get fib(13).
//
//
fib_u.a_w = ur_fib12;
fib_u.b_w = ur_fib11;
fib_u.bit_w = 0;
u3i_slab_init(sab_u, 0, fib_u.a_w);
u3a_walk_fore(a, &fib_u, _cs_jam_fib_atom_cb, _cs_jam_fib_cell_cb);
u3h_free(fib_u.har_p);
return fib_u.bit_w;
}
typedef struct _jam_xeno_s {
u3p(u3h_root) har_p;
ur_bsw_t rit_u;
} _jam_xeno_t;
/* _cs_coin_chub(): shortcircuit u3i_chubs().
*/
static inline u3_atom
_cs_coin_chub(c3_d a_d)
{
return ( 0x7fffffffULL >= a_d ) ? a_d : u3i_chubs(1, &a_d);
}
/* _cs_jam_xeno_atom(): encode in/direct atom in bitstream.
*/
static inline void
_cs_jam_bsw_atom(ur_bsw_t* rit_u, c3_w met_w, u3_atom a)
{
if ( c3y == u3a_is_cat(a) ) {
// XX need a ur_bsw_atom32()
//
ur_bsw_atom64(rit_u, (c3_y)met_w, (c3_d)a);
}
else {
u3a_atom* vat_u = u3a_to_ptr(a);
// XX assumes little-endian
// XX need a ur_bsw_atom_words()
//
c3_y* byt_y = (c3_y*)vat_u->buf_w;
ur_bsw_atom_bytes(rit_u, (c3_d)met_w, byt_y);
}
}
/* _cs_jam_bsw_back(): encode in/direct backref in bitstream.
*/
static inline void
_cs_jam_bsw_back(ur_bsw_t* rit_u, c3_w met_w, u3_atom a)
{
c3_d bak_d = ( c3y == u3a_is_cat(a) )
? (c3_d)a
: u3r_chub(0, a);
// XX need a ur_bsw_back32()
//
ur_bsw_back64(rit_u, (c3_y)met_w, bak_d);
}
/* _cs_jam_xeno_atom(): encode atom or backref in bitstream.
*/
static void
_cs_jam_xeno_atom(u3_atom a, void* ptr_v)
{
_jam_xeno_t* jam_u = ptr_v;
ur_bsw_t* rit_u = &(jam_u->rit_u);
u3_weak bak = u3h_git(jam_u->har_p, a);
c3_w met_w = u3r_met(0, a);
if ( u3_none == bak ) {
u3h_put(jam_u->har_p, a, _cs_coin_chub(rit_u->bits));
_cs_jam_bsw_atom(rit_u, met_w, a);
}
else {
c3_w bak_w = u3r_met(0, bak);
if ( met_w <= bak_w ) {
_cs_jam_bsw_atom(rit_u, met_w, a);
}
else {
_cs_jam_bsw_back(rit_u, bak_w, bak);
}
}
}
/* _cs_jam_xeno_cell(): encode cell or backref in bitstream.
*/
static c3_o
_cs_jam_xeno_cell(u3_noun a, void* ptr_v)
{
_jam_xeno_t* jam_u = ptr_v;
ur_bsw_t* rit_u = &(jam_u->rit_u);
u3_weak bak = u3h_git(jam_u->har_p, a);
if ( u3_none == bak ) {
u3h_put(jam_u->har_p, a, _cs_coin_chub(rit_u->bits));
ur_bsw_cell(rit_u);
return c3y;
}
else {
_cs_jam_bsw_back(rit_u, u3r_met(0, bak), bak);
return c3n;
}
}
/* u3s_jam_xeno(): jam with off-loom buffer (re-)allocation.
*/
c3_d
u3s_jam_xeno(u3_noun a, c3_d* len_d, c3_y** byt_y)
{
_jam_xeno_t jam_u = {0};
ur_bsw_init(&jam_u.rit_u, ur_fib11, ur_fib12);
jam_u.har_p = u3h_new();
u3a_walk_fore(a, &jam_u, _cs_jam_xeno_atom, _cs_jam_xeno_cell);
u3h_free(jam_u.har_p);
return ur_bsw_done(&jam_u.rit_u, len_d, byt_y);
}
/* _cs_cue: stack frame for tracking intermediate cell results
*/
typedef struct _cs_cue {
u3_weak hed; // head of a cell or u3_none
u3_atom wid; // bitwidth of [hed] or 0
u3_atom cur; // bit-cursor position
} _cs_cue;
/* _cs_rub: rub, TRANSFER [cur], RETAIN [a]
*/
static inline u3_noun
_cs_rub(u3_atom cur, u3_atom a)
{
u3_noun pro = u3qe_rub(cur, a);
u3z(cur);
return pro;
}
/* _cs_cue_next(): advance into [a], reading next value
** TRANSFER [cur], RETAIN [a]
*/
static inline u3_noun
_cs_cue_next(u3a_pile* pil_u,
u3p(u3h_root) har_p,
u3_atom cur,
u3_atom a,
u3_atom* wid)
{
while ( 1 ) {
// read tag bit at cur
//
c3_y tag_y = u3qc_cut(0, cur, 1, a);
// low bit unset, (1 + cur) points to an atom
//
// produce atom and the width we read
//
if ( 0 == tag_y ) {
u3_noun bur = _cs_rub(u3i_vint(cur), a);
u3_noun pro = u3k(u3t(bur));
u3h_put(har_p, cur, u3k(pro));
*wid = u3qa_inc(u3h(bur));
u3z(bur);
return pro;
}
else {
// read tag bit at (1 + cur)
//
{
u3_noun x = u3qa_inc(cur);
tag_y = u3qc_cut(0, x, 1, a);
u3z(x);
}
// next bit set, (2 + cur) points to a backref
//
// produce referenced value and the width we read
//
if ( 1 == tag_y ) {
u3_noun bur = _cs_rub(u3ka_add(2, cur), a);
u3_noun pro = u3x_good(u3h_get(har_p, u3t(bur)));
*wid = u3qa_add(2, u3h(bur));
u3z(bur);
return pro;
}
// next bit unset, (2 + cur) points to the head of a cell
//
// push a head-frame onto the road stack and read the head
//
else {
_cs_cue* fam_u = u3a_push(pil_u);
// NB: fam_u->wid unused in head-frame
//
fam_u->hed = u3_none;
fam_u->cur = cur;
cur = u3qa_add(2, cur);
continue;
}
}
}
}
u3_noun
u3s_cue(u3_atom a)
{
// pro: cue'd noun product
// wid: bitwidth read to produce [pro]
// fam_u: stack frame
// har_p: backreference table
// pil_u: stack control structure
//
u3_noun pro;
u3_atom wid;
_cs_cue* fam_u;
u3p(u3h_root) har_p = u3h_new();
u3a_pile pil_u;
// initialize stack control
//
u3a_pile_prep(&pil_u, sizeof(*fam_u));
// commence cueing at bit-position 0
//
pro = _cs_cue_next(&pil_u, har_p, 0, a, &wid);
// process cell results
//
if ( c3n == u3a_pile_done(&pil_u) ) {
fam_u = u3a_peek(&pil_u);
do {
// head-frame: stash [pro] and [wid]; continue into the tail
//
if ( u3_none == fam_u->hed ) {
// NB: fam_u->wid unused in head-frame
//
fam_u->hed = pro;
fam_u->wid = wid;
// continue reading at the bit-position after [pro]
{
u3_noun cur = u3ka_add(2, u3qa_add(wid, fam_u->cur));
pro = _cs_cue_next(&pil_u, har_p, cur, a, &wid);
}
fam_u = u3a_peek(&pil_u);
}
// tail-frame: cons cell, recalculate [wid], and pop the stack
//
else {
pro = u3nc(fam_u->hed, pro);
u3h_put(har_p, fam_u->cur, u3k(pro));
u3z(fam_u->cur);
wid = u3ka_add(2, u3ka_add(wid, fam_u->wid));
fam_u = u3a_pop(&pil_u);
}
} while ( c3n == u3a_pile_done(&pil_u) );
}
u3z(wid);
u3h_free(har_p);
return pro;
}
/*
** stack frame for recording head vs tail iteration
**
** $? [u3_none bits=@]
** [hed=* bits=@]
*/
typedef struct _cue_frame_s {
u3_weak ref;
c3_d bit_d;
} _cue_frame_t;
/* _cs_cue_xeno_next(): read next value from bitstream, dictionary off-loom.
*/
static inline ur_cue_res_e
_cs_cue_xeno_next(u3a_pile* pil_u,
ur_bsr_t* red_u,
ur_dict32_t* dic_u,
u3_noun* out)
{
ur_root_t* rot_u = 0;
while ( 1 ) {
c3_d len_d, bit_d = red_u->bits;
ur_cue_tag_e tag_e;
ur_cue_res_e res_e;
if ( ur_cue_good != (res_e = ur_bsr_tag(red_u, &tag_e)) ) {
return res_e;
}
switch ( tag_e ) {
default: u3_assert(0);
case ur_jam_cell: {
_cue_frame_t* fam_u = u3a_push(pil_u);
fam_u->ref = u3_none;
fam_u->bit_d = bit_d;
continue;
}
case ur_jam_back: {
if ( ur_cue_good != (res_e = ur_bsr_rub_len(red_u, &len_d)) ) {
return res_e;
}
else if ( 62 < len_d ) {
return ur_cue_meme;
}
else {
c3_d bak_d = ur_bsr64_any(red_u, len_d);
c3_w bak_w;
if ( !ur_dict32_get(rot_u, dic_u, bak_d, &bak_w) ) {
return ur_cue_back;
}
*out = u3k((u3_noun)bak_w);
return ur_cue_good;
}
}
case ur_jam_atom: {
if ( ur_cue_good != (res_e = ur_bsr_rub_len(red_u, &len_d)) ) {
return res_e;
}
if ( 31 >= len_d ) {
*out = (u3_noun)ur_bsr32_any(red_u, len_d);
}
else {
c3_d byt_d = (len_d + 0x7) >> 3;
u3i_slab sab_u;
if ( 0xffffffffULL < byt_d) {
return ur_cue_meme;
}
else {
u3i_slab_init(&sab_u, 3, byt_d);
ur_bsr_bytes_any(red_u, len_d, sab_u.buf_y);
*out = u3i_slab_mint_bytes(&sab_u);
}
}
ur_dict32_put(rot_u, dic_u, bit_d, *out);
return ur_cue_good;
}
}
}
}
struct _u3_cue_xeno {
ur_dict32_t dic_u;
};
/* _cs_cue_xeno(): cue on-loom, with off-loom dictionary in handle.
*/
static u3_weak
_cs_cue_xeno(u3_cue_xeno* sil_u,
c3_d len_d,
const c3_y* byt_y)
{
ur_bsr_t red_u = {0};
ur_dict32_t* dic_u = &sil_u->dic_u;
u3a_pile pil_u;
_cue_frame_t* fam_u;
ur_cue_res_e res_e;
u3_noun ref;
// initialize stack control
//
u3a_pile_prep(&pil_u, sizeof(*fam_u));
// init bitstream-reader
//
if ( ur_cue_good != (res_e = ur_bsr_init(&red_u, len_d, byt_y)) ) {
return c3n;
}
// bit-cursor (and backreferences) must fit in 62-bit direct atoms
//
else if ( 0x7ffffffffffffffULL < len_d ) {
return c3n;
}
// advance into stream
//
res_e = _cs_cue_xeno_next(&pil_u, &red_u, dic_u, &ref);
// process cell results
//
if ( (c3n == u3a_pile_done(&pil_u))
&& (ur_cue_good == res_e) )
{
fam_u = u3a_peek(&pil_u);
do {
// f is a head-frame; stash result and read the tail from the stream
//
if ( u3_none == fam_u->ref ) {
fam_u->ref = ref;
res_e = _cs_cue_xeno_next(&pil_u, &red_u, dic_u, &ref);
fam_u = u3a_peek(&pil_u);
}
// f is a tail-frame; pop the stack and continue
//
else {
ur_root_t* rot_u = 0;
ref = u3nc(fam_u->ref, ref);
ur_dict32_put(rot_u, dic_u, fam_u->bit_d, ref);
fam_u = u3a_pop(&pil_u);
}
}
while ( (c3n == u3a_pile_done(&pil_u))
&& (ur_cue_good == res_e) );
}
if ( ur_cue_good == res_e ) {
return ref;
}
// on failure, unwind the stack and dispose of intermediate nouns
//
else if ( c3n == u3a_pile_done(&pil_u) ) {
do {
if ( u3_none != fam_u->ref ) {
u3z(fam_u->ref);
}
fam_u = u3a_pop(&pil_u);
}
while ( c3n == u3a_pile_done(&pil_u) );
}
return u3_none;
}
/* u3s_cue_xeno_init_with(): initialize a cue_xeno handle as specified.
*/
u3_cue_xeno*
u3s_cue_xeno_init_with(c3_d pre_d, c3_d siz_d)
{
u3_cue_xeno* sil_u;
u3_assert( &(u3H->rod_u) == u3R );
sil_u = c3_calloc(sizeof(*sil_u));
ur_dict32_grow((ur_root_t*)0, &sil_u->dic_u, pre_d, siz_d);
return sil_u;
}
/* u3s_cue_xeno_init(): initialize a cue_xeno handle.
*/
u3_cue_xeno*
u3s_cue_xeno_init(void)
{
return u3s_cue_xeno_init_with(ur_fib10, ur_fib11);
}
/* u3s_cue_xeno_init(): cue on-loom, with off-loom dictionary in handle.
*/
u3_weak
u3s_cue_xeno_with(u3_cue_xeno* sil_u,
c3_d len_d,
const c3_y* byt_y)
{
u3_weak som;
u3_assert( &(u3H->rod_u) == u3R );
som = _cs_cue_xeno(sil_u, len_d, byt_y);
ur_dict32_wipe(&sil_u->dic_u);
return som;
}
/* u3s_cue_xeno_init(): dispose cue_xeno handle.
*/
void
u3s_cue_xeno_done(u3_cue_xeno* sil_u)
{
ur_dict_free((ur_dict_t*)&sil_u->dic_u);
c3_free(sil_u);
}
/* u3s_cue_xeno(): cue on-loom, with off-loom dictionary.
*/
u3_weak
u3s_cue_xeno(c3_d len_d,
const c3_y* byt_y)
{
u3_cue_xeno* sil_u;
u3_weak som;
u3_assert( &(u3H->rod_u) == u3R );
sil_u = u3s_cue_xeno_init();
som = _cs_cue_xeno(sil_u, len_d, byt_y);
u3s_cue_xeno_done(sil_u);
return som;
}
/* _cs_cue_need(): bail on ur_cue_* read failures.
*/
static inline void
_cs_cue_need(ur_cue_res_e res_e)
{
if ( ur_cue_good == res_e ) {
return;
}
else {
c3_m mot_m = (ur_cue_meme == res_e) ? c3__meme : c3__exit;
u3m_bail(mot_m);
}
}
/* _cs_cue_get(): u3h_get wrapper handling allocation and refcounts.
*/
static inline u3_weak
_cs_cue_get(u3p(u3h_root) har_p, c3_d key_d)
{
u3_atom key = _cs_coin_chub(key_d);
u3_weak pro = u3h_get(har_p, key);
u3z(key);
return pro;
}
/* _cs_cue_put(): u3h_put wrapper handling allocation and refcounts.
*/
static inline u3_noun
_cs_cue_put(u3p(u3h_root) har_p, c3_d key_d, u3_noun val)
{
u3_atom key = _cs_coin_chub(key_d);
u3h_put(har_p, key, u3k(val));
u3z(key);
return val;
}
/* _cs_cue_bytes_next(): read next value from bitstream.
*/
static inline u3_noun
_cs_cue_bytes_next(u3a_pile* pil_u,
u3p(u3h_root) har_p,
ur_bsr_t* red_u)
{
while ( 1 ) {
c3_d len_d, bit_d = red_u->bits;
ur_cue_tag_e tag_e;
_cs_cue_need(ur_bsr_tag(red_u, &tag_e));
switch ( tag_e ) {
default: u3_assert(0);
case ur_jam_cell: {
_cue_frame_t* fam_u = u3a_push(pil_u);
fam_u->ref = u3_none;
fam_u->bit_d = bit_d;
continue;
}
case ur_jam_back: {
_cs_cue_need(ur_bsr_rub_len(red_u, &len_d));
if ( 62 < len_d ) {
return u3m_bail(c3__meme);
}
else {
c3_d bak_d = ur_bsr64_any(red_u, len_d);
u3_weak bak = _cs_cue_get(har_p, bak_d);
return u3x_good(bak);
}
}
case ur_jam_atom: {
u3_atom vat;
_cs_cue_need(ur_bsr_rub_len(red_u, &len_d));
if ( 31 >= len_d ) {
vat = (u3_noun)ur_bsr32_any(red_u, len_d);
}
else {
u3i_slab sab_u;
u3i_slab_init(&sab_u, 0, len_d);
ur_bsr_bytes_any(red_u, len_d, sab_u.buf_y);
vat = u3i_slab_mint_bytes(&sab_u);
}
return _cs_cue_put(har_p, bit_d, vat);
}
}
}
}
/* u3s_cue_bytes(): cue bytes onto the loom.
*/
u3_noun
u3s_cue_bytes(c3_d len_d, const c3_y* byt_y)
{
ur_bsr_t red_u = {0};
u3a_pile pil_u;
_cue_frame_t* fam_u;
u3p(u3h_root) har_p;
u3_noun ref;
// initialize stack control
//
u3a_pile_prep(&pil_u, sizeof(*fam_u));
// initialize a hash table for dereferencing backrefs
//
har_p = u3h_new();
// init bitstream-reader
//
_cs_cue_need(ur_bsr_init(&red_u, len_d, byt_y));
// bit-cursor (and backreferences) must fit in 62-bit direct atoms
//
if ( 0x7ffffffffffffffULL < len_d ) {
return u3m_bail(c3__meme);
}
// advance into stream
//
ref = _cs_cue_bytes_next(&pil_u, har_p, &red_u);
// process cell results
//
if ( c3n == u3a_pile_done(&pil_u) ) {
fam_u = u3a_peek(&pil_u);
do {
// f is a head-frame; stash result and read the tail from the stream
//
if ( u3_none == fam_u->ref ) {
fam_u->ref = ref;
ref = _cs_cue_bytes_next(&pil_u, har_p, &red_u);
fam_u = u3a_peek(&pil_u);
}
// f is a tail-frame; pop the stack and continue
//
else {
ref = u3nc(fam_u->ref, ref);
_cs_cue_put(har_p, fam_u->bit_d, ref);
fam_u = u3a_pop(&pil_u);
}
}
while ( c3n == u3a_pile_done(&pil_u) );
}
u3h_free(har_p);
return ref;
}
/* u3s_cue_atom(): cue atom.
*/
u3_noun
u3s_cue_atom(u3_atom a)
{
c3_w len_w = u3r_met(3, a);
c3_y* byt_y;
// XX assumes little-endian
//
if ( c3y == u3a_is_cat(a) ) {
byt_y = (c3_y*)&a;
}
else {
u3a_atom* vat_u = u3a_to_ptr(a);
byt_y = (c3_y*)vat_u->buf_w;
}
return u3s_cue_bytes((c3_d)len_w, byt_y);
}
/* _cs_etch_ud_size(): output length in @ud for given mpz_t.
*/
static inline size_t
_cs_etch_ud_size(mpz_t a_mp)
{
size_t len_i = mpz_sizeinbase(a_mp, 10);
return len_i + (len_i / 3); // separators
}
/* _cs_etch_ud_bytes(): atom to @ud impl.
*/
static size_t
_cs_etch_ud_bytes(mpz_t a_mp, size_t len_i, c3_y* hun_y)
{
c3_y* buf_y = hun_y + (len_i - 1);
mpz_t b_mp;
c3_w b_w;
size_t dif_i;
mpz_init2(b_mp, 10);
if ( !mpz_size(a_mp) ) {
*buf_y-- = '0';
}
else {
while ( 1 ) {
b_w = mpz_tdiv_qr_ui(a_mp, b_mp, a_mp, 1000);
u3_assert( mpz_get_ui(b_mp) == b_w ); // XX
if ( !mpz_size(a_mp) ) {
while ( b_w ) {
*buf_y-- = '0' + (b_w % 10);
b_w /= 10;
}
break;
}
*buf_y-- = '0' + (b_w % 10);
b_w /= 10;
*buf_y-- = '0' + (b_w % 10);
b_w /= 10;
*buf_y-- = '0' + (b_w % 10);
*buf_y-- = '.';
}
}
buf_y++;
u3_assert( buf_y >= hun_y ); // XX
// mpz_sizeinbase may overestimate by 1
//
{
size_t dif_i = buf_y - hun_y;
if ( dif_i ) {
len_i -= dif_i;
memmove(hun_y, buf_y, len_i);
memset(hun_y + len_i, 0, dif_i);
}
}
mpz_clear(b_mp);
return len_i;
}
/* u3s_etch_ud_smol(): c3_d to @ud
**
** =(26 (met 3 (scot %ud (dec (bex 64)))))
*/
c3_y*
u3s_etch_ud_smol(c3_d a_d, c3_y hun_y[26])
{
c3_y* buf_y = hun_y + 25;
c3_w b_w;
if ( !a_d ) {
*buf_y-- = '0';
}
else {
while ( 1 ) {
b_w = a_d % 1000;
a_d /= 1000;
if ( !a_d ) {
while ( b_w ) {
*buf_y-- = '0' + (b_w % 10);
b_w /= 10;
}
break;
}
*buf_y-- = '0' + (b_w % 10);
b_w /= 10;
*buf_y-- = '0' + (b_w % 10);
b_w /= 10;
*buf_y-- = '0' + (b_w % 10);
*buf_y-- = '.';
}
}
return buf_y + 1;
}
/* u3s_etch_ud(): atom to @ud.
*/
u3_atom
u3s_etch_ud(u3_atom a)
{
c3_d a_d;
if ( c3y == u3r_safe_chub(a, &a_d) ) {
c3_y hun_y[26];
c3_y* buf_y = u3s_etch_ud_smol(a_d, hun_y);
c3_w dif_w = (c3_p)buf_y - (c3_p)hun_y;
return u3i_bytes(26 - dif_w, buf_y);
}
u3i_slab sab_u;
size_t len_i;
mpz_t a_mp;
u3r_mp(a_mp, a);
len_i = _cs_etch_ud_size(a_mp);
u3i_slab_bare(&sab_u, 3, len_i);
sab_u.buf_w[sab_u.len_w - 1] = 0;
_cs_etch_ud_bytes(a_mp, len_i, sab_u.buf_y);
mpz_clear(a_mp);
return u3i_slab_mint_bytes(&sab_u);
}
/* u3s_etch_ud_c(): atom to @ud, as a malloc'd c string.
*/
size_t
u3s_etch_ud_c(u3_atom a, c3_c** out_c)
{
c3_d a_d;
size_t len_i;
c3_y* buf_y;