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trace.c
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trace.c
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/// @file
#include "trace.h"
#include <errno.h>
#include <pthread.h>
#include <sys/stat.h>
#include <time.h>
#include "allocate.h"
#include "imprison.h"
#include "jets/k.h"
#include "log.h"
#include "manage.h"
#include "options.h"
#include "retrieve.h"
#include "vortex.h"
u3t_trace u3t_Trace;
static c3_o _ct_lop_o;
/// Nock PID.
static pid_t _nock_pid_i = 0;
/// JSON trace file.
static FILE* _file_u = NULL;
/// Trace counter. Tracks the number of entries written to the JSON trace file.
static c3_w _trace_cnt_w = 0;
/// File counter. Tracks the number of times u3t_trace_close() has been called.
static c3_w _file_cnt_w = 0;
/* u3t_push(): push on trace stack.
*/
void
u3t_push(u3_noun mon)
{
u3R->bug.tax = u3nc(mon, u3R->bug.tax);
}
/* u3t_mean(): push `[%mean roc]` on trace stack.
*/
void
u3t_mean(u3_noun roc)
{
u3R->bug.tax = u3nc(u3nc(c3__mean, roc), u3R->bug.tax);
}
/* u3t_drop(): drop from meaning stack.
*/
void
u3t_drop(void)
{
u3_assert(_(u3du(u3R->bug.tax)));
{
u3_noun tax = u3R->bug.tax;
u3R->bug.tax = u3k(u3t(tax));
u3z(tax);
}
}
/* u3t_slog(): print directly.
*/
void
u3t_slog(u3_noun hod)
{
if ( 0 != u3C.slog_f ) {
u3C.slog_f(hod);
}
else {
u3z(hod);
}
}
/* u3t_heck(): profile point.
*/
void
u3t_heck(u3_atom cog)
{
#if 0
u3R->pro.cel_d++;
#else
c3_w len_w = u3r_met(3, cog);
c3_c* str_c = alloca(1 + len_w);
u3r_bytes(0, len_w, (c3_y *)str_c, cog);
str_c[len_w] = 0;
// Profile sampling, because it allocates on the home road,
// only works on when we're not at home.
//
if ( &(u3H->rod_u) != u3R ) {
u3a_road* rod_u;
rod_u = u3R;
u3R = &(u3H->rod_u);
{
if ( 0 == u3R->pro.day ) {
u3R->pro.day = u3do("doss", 0);
}
u3R->pro.day = u3dc("pi-heck", u3i_string(str_c), u3R->pro.day);
}
u3R = rod_u;
}
#endif
}
#if 0
static void
_ct_sane(u3_noun lab)
{
if ( u3_nul != lab ) {
u3_assert(c3y == u3du(lab));
u3_assert(c3y == u3ud(u3h(lab)));
_ct_sane(u3t(lab));
}
}
#endif
#if 1
/* _t_samp_process(): process raw sample data from live road.
*/
static u3_noun
_t_samp_process(u3_road* rod_u)
{
u3_noun pef = u3_nul; // (list (pair path (map path ,@ud)))
u3_noun muf = u3_nul; // (map path ,@ud)
c3_w len_w = 0;
// Accumulate a label/map stack which collapses recursive segments.
//
while ( rod_u ) {
u3_noun don = rod_u->pro.don;
while ( u3_nul != don ) {
// Get surface allocated label
//
// u3_noun lab = u3nc(u3i_string("foobar"), 0);
u3_noun laj = u3h(don),
lab = u3a_take(laj);
u3a_wash(laj);
// Add the label to the traced label stack, trimming recursion.
//
{
u3_noun old;
if ( u3_none == (old = u3kdb_get(u3k(muf), u3k(lab))) ) {
muf = u3kdb_put(muf, u3k(lab), len_w);
pef = u3nc(u3nc(lab, u3k(muf)), pef);
len_w += 1;
}
else {
if ( !_(u3a_is_cat(old)) ) {
u3m_bail(c3__fail);
}
u3z(muf);
while ( len_w > (old + 1) ) {
u3_noun t_pef = u3k(u3t(pef));
len_w -= 1;
u3z(pef);
pef = t_pef;
}
muf = u3k(u3t(u3h(pef)));
u3z(lab);
}
}
don = u3t(don);
}
rod_u = u3tn(u3_road, rod_u->par_p);
}
u3z(muf);
// Lose the maps and save a pure label stack in original order.
//
{
u3_noun pal = u3_nul;
while ( u3_nul != pef ) {
u3_noun h_pef = u3h(pef);
u3_noun t_pef = u3k(u3t(pef));
pal = u3nc(u3k(u3h(h_pef)), pal);
u3z(pef);
pef = t_pef;
}
// u3l_log("sample: stack length %d", u3kb_lent(u3k(pal)));
return pal;
}
}
#endif
/* u3t_samp(): sample.
*/
void
u3t_samp(void)
{
if ( c3y == _ct_lop_o ) {
// _ct_lop_o here is a mutex for modifying pro.don. we
// do not want to sample in the middle of doing that, as
// it can cause memory errors.
return;
}
c3_w old_wag = u3C.wag_w;
u3C.wag_w &= ~u3o_debug_cpu;
u3C.wag_w &= ~u3o_trace;
static int home = 0;
static int away = 0;
// Profile sampling, because it allocates on the home road,
// only works on when we're not at home.
//
if ( &(u3H->rod_u) != u3R ) {
home++;
c3_l mot_l;
u3a_road* rod_u;
if ( _(u3T.mal_o) ) {
mot_l = c3_s3('m','a','l');
}
else if ( _(u3T.coy_o) ) {
mot_l = c3_s3('c','o','y');
}
else if ( _(u3T.euq_o) ) {
mot_l = c3_s3('e','u','q');
}
else if ( _(u3T.far_o) ) {
mot_l = c3_s3('f','a','r');
}
else if ( _(u3T.noc_o) ) {
u3_assert(!_(u3T.glu_o));
mot_l = c3_s3('n','o','c');
}
else if ( _(u3T.glu_o) ) {
mot_l = c3_s3('g','l','u');
}
else {
mot_l = c3_s3('f','u','n');
}
rod_u = u3R;
u3R = &(u3H->rod_u);
{
u3_noun lab = _t_samp_process(rod_u);
u3_assert(u3R == &u3H->rod_u);
if ( 0 == u3R->pro.day ) {
/* bunt a +doss
*/
u3R->pro.day = u3nt(u3nq(0, 0, 0, u3nq(0, 0, 0, 0)), 0, 0);
}
u3R->pro.day = u3dt("pi-noon", mot_l, lab, u3R->pro.day);
}
u3R = rod_u;
}
else {
away++;
// fprintf(stderr,"home: %06d away: %06d\r\n", home, away);
}
u3C.wag_w = old_wag;
}
/* u3t_come(): push on profile stack; return yes if active push. RETAIN.
*/
c3_o
u3t_come(u3_noun lab)
{
if ( (u3_nul == u3R->pro.don) || !_(u3r_sing(lab, u3h(u3R->pro.don))) ) {
u3a_gain(lab);
_ct_lop_o = c3y;
u3R->pro.don = u3nc(lab, u3R->pro.don);
_ct_lop_o = c3n;
return c3y;
}
else return c3n;
}
/* u3t_flee(): pop off profile stack.
*/
void
u3t_flee(void)
{
_ct_lop_o = c3y;
u3_noun don = u3R->pro.don;
u3R->pro.don = u3k(u3t(don));
_ct_lop_o = c3n;
u3z(don);
}
/* u3t_trace_open(): opens a trace file and writes the preamble.
*/
void
u3t_trace_open(const c3_c* dir_c)
{
c3_c fil_c[2048];
if ( !dir_c ) {
return;
}
snprintf(fil_c, 2048, "%s/.urb/put/trace", dir_c);
struct stat st;
if ( (-1 == stat(fil_c, &st))
&& (-1 == c3_mkdir(fil_c, 0700)) )
{
fprintf(stderr, "mkdir: %s failed: %s\r\n", fil_c, strerror(errno));
return;
}
c3_c lif_c[2056];
snprintf(lif_c, 2056, "%s/%d.json", fil_c, _file_cnt_w);
_file_u = c3_fopen(lif_c, "w");
_nock_pid_i = (int)getpid();
if ( !_file_u ) {
fprintf(stderr, "trace open: %s\r\n", strerror(errno));
return;
}
fprintf(_file_u, "[ ");
// We have two "threads", the event processing and the nock stuff.
// tid 1 = event processing
// tid 2 = nock processing
fprintf(_file_u,
"{\"name\": \"process_name\", \"ph\": \"M\", \"pid\": %d, \"args\": "
"{\"name\": \"urbit\"}},\n",
_nock_pid_i);
fprintf(_file_u,
"{\"name\": \"thread_name\", \"ph\": \"M\", \"pid\": %d, \"tid\": 1, "
"\"args\": {\"name\": \"Event Processing\"}},\n",
_nock_pid_i);
fprintf(_file_u,
"{\"name\": \"thread_sort_index\", \"ph\": \"M\", \"pid\": %d, "
"\"tid\": 1, \"args\": {\"sort_index\": 1}},\n",
_nock_pid_i);
fprintf(_file_u,
"{\"name\": \"thread_name\", \"ph\": \"M\", \"pid\": %d, \"tid\": 2, "
"\"args\": {\"name\": \"Nock\"}},\n",
_nock_pid_i);
fprintf(_file_u,
"{\"name\": \"thread_sort_index\", \"ph\": \"M\", \"pid\": %d, "
"\"tid\": 2, \"args\": {\"sort_index\": 2}},\n",
_nock_pid_i);
_trace_cnt_w = 5;
}
/* u3t_trace_close(): closes a trace file. optional.
*/
void
u3t_trace_close()
{
if ( !_file_u )
return;
// We don't terminate the JSON because of the file format.
fclose(_file_u);
_trace_cnt_w = 0;
_file_cnt_w++;
}
/* u3t_trace_time(): microsecond clock
*/
c3_d u3t_trace_time()
{
struct timeval tim_tv;
gettimeofday(&tim_tv, 0);
return 1000000ULL * tim_tv.tv_sec + tim_tv.tv_usec;
}
/* u3t_nock_trace_push(): push a trace onto the trace stack; returns yes if pushed.
*
* The trace stack is a stack of [path time-entered].
*/
c3_o
u3t_nock_trace_push(u3_noun lab)
{
if ( !_file_u )
return c3n;
if ( (u3_nul == u3R->pro.trace) ||
!_(u3r_sing(lab, u3h(u3h(u3R->pro.trace)))) ) {
u3a_gain(lab);
c3_d time = u3t_trace_time();
u3R->pro.trace = u3nc(u3nc(lab, u3i_chubs(1, &time)), u3R->pro.trace);
return c3y;
}
else {
return c3n;
}
}
/* u3t_nock_trace_pop(): pops a trace from the trace stack.
*
* When we remove the trace from the stack, we check to see if the sample is
* large enough to process, as we'll otherwise keep track of individual +add
* calls. If it is, we write it out to the tracefile.
*/
void
u3t_nock_trace_pop()
{
if ( !_file_u )
return;
u3_noun trace = u3R->pro.trace;
u3R->pro.trace = u3k(u3t(trace));
u3_noun item = u3h(trace);
u3_noun lab = u3h(item);
c3_d start_time = u3r_chub(0, u3t(item));
// 33microseconds (a 30th of a millisecond).
c3_d duration = u3t_trace_time() - start_time;
if (duration > 33) {
c3_c* name = u3m_pretty_path(lab);
fprintf(_file_u,
"{\"cat\": \"nock\", \"name\": \"%s\", \"ph\":\"%c\", \"pid\": %d, "
"\"tid\": 2, \"ts\": %" PRIu64 ", \"dur\": %" PRIu64 "}, \n",
name,
'X',
_nock_pid_i,
start_time,
duration);
c3_free(name);
_trace_cnt_w++;
}
u3z(trace);
}
/* u3t_event_trace(): dumps a simple event from outside nock.
*/
void
u3t_event_trace(const c3_c* name, c3_c type)
{
if ( !_file_u )
return;
fprintf(_file_u,
"{\"cat\": \"event\", \"name\": \"%s\", \"ph\":\"%c\", \"pid\": %d, "
"\"tid\": 1, \"ts\": %" PRIu64 ", \"id\": \"0x100\"}, \n",
name,
type,
_nock_pid_i,
u3t_trace_time());
_trace_cnt_w++;
}
/* u3t_print_steps: print step counter.
*/
void
u3t_print_steps(FILE* fil_u, c3_c* cap_c, c3_d sep_d)
{
u3_assert( 0 != fil_u );
c3_w gib_w = (sep_d / 1000000000ULL);
c3_w mib_w = (sep_d % 1000000000ULL) / 1000000ULL;
c3_w kib_w = (sep_d % 1000000ULL) / 1000ULL;
c3_w bib_w = (sep_d % 1000ULL);
// XX prints to stderr since it's called on shutdown, daemon may be gone
//
if ( sep_d ) {
if ( gib_w ) {
fprintf(fil_u, "%s: G/%d.%03d.%03d.%03d\r\n",
cap_c, gib_w, mib_w, kib_w, bib_w);
}
else if ( mib_w ) {
fprintf(fil_u, "%s: M/%d.%03d.%03d\r\n", cap_c, mib_w, kib_w, bib_w);
}
else if ( kib_w ) {
fprintf(fil_u, "%s: K/%d.%03d\r\n", cap_c, kib_w, bib_w);
}
else if ( bib_w ) {
fprintf(fil_u, "%s: %d\r\n", cap_c, bib_w);
}
}
}
/* u3t_damp(): print and clear profile data.
*/
void
u3t_damp(FILE* fil_u)
{
u3_assert( 0 != fil_u );
if ( 0 != u3R->pro.day ) {
u3_noun wol = u3do("pi-tell", u3R->pro.day);
// XX prints to stderr since it's called on shutdown, daemon may be gone
//
{
u3_noun low = wol;
while ( u3_nul != low ) {
c3_c* str_c = (c3_c*)u3r_tape(u3h(low));
fputs(str_c, fil_u);
fputs("\r\n", fil_u);
c3_free(str_c);
low = u3t(low);
}
u3z(wol);
}
/* bunt a +doss
*/
u3R->pro.day = u3nt(u3nq(0, 0, 0, u3nq(0, 0, 0, 0)), 0, 0);
}
u3t_print_steps(fil_u, "nocks", u3R->pro.nox_d);
u3t_print_steps(fil_u, "cells", u3R->pro.cel_d);
u3R->pro.nox_d = 0;
u3R->pro.cel_d = 0;
}
/* _ct_sigaction(): profile sigaction callback.
*/
void _ct_sigaction(c3_i x_i)
{
u3t_samp();
}
/* u3t_init(): initialize tracing layer.
*/
void
u3t_init(void)
{
u3T.noc_o = c3n;
u3T.glu_o = c3n;
u3T.mal_o = c3n;
u3T.far_o = c3n;
u3T.coy_o = c3n;
u3T.euq_o = c3n;
}
c3_w
u3t_trace_cnt(void)
{
return _trace_cnt_w;
}
c3_w
u3t_file_cnt(void)
{
return _file_cnt_w;
}
/* u3t_boot(): turn sampling on.
*/
void
u3t_boot(void)
{
if ( u3C.wag_w & u3o_debug_cpu ) {
_ct_lop_o = c3n;
#if defined(U3_OS_PROF)
// skip profiling if we don't yet have an arvo kernel
//
if ( 0 == u3A->roc ) {
return;
}
// Register _ct_sigaction to be called on `SIGPROF`.
{
struct sigaction sig_s = {{0}};
sig_s.sa_handler = _ct_sigaction;
sigemptyset(&(sig_s.sa_mask));
sigaction(SIGPROF, &sig_s, 0);
}
// Unblock `SIGPROF` for this thread (we will block it again when `u3t_boff` is called).
{
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGPROF);
if ( 0 != pthread_sigmask(SIG_UNBLOCK, &set, NULL) ) {
u3l_log("trace: thread mask SIGPROF: %s", strerror(errno));
}
}
// Ask for SIGPROF to be sent every 10ms.
{
struct itimerval itm_v = {{0}};
itm_v.it_interval.tv_usec = 10000;
itm_v.it_value = itm_v.it_interval;
setitimer(ITIMER_PROF, &itm_v, 0);
}
#endif
}
}
/* u3t_boff(): turn profile sampling off.
*/
void
u3t_boff(void)
{
if ( u3C.wag_w & u3o_debug_cpu ) {
#if defined(U3_OS_PROF)
// Mask SIGPROF signals in this thread (and this is the only
// thread that unblocked them).
{
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGPROF);
if ( 0 != pthread_sigmask(SIG_BLOCK, &set, NULL) ) {
u3l_log("trace: thread mask SIGPROF: %s", strerror(errno));
}
}
// Disable the SIGPROF timer.
{
struct itimerval itm_v = {{0}};
setitimer(ITIMER_PROF, &itm_v, 0);
}
// Ignore SIGPROF signals.
{
struct sigaction sig_s = {{0}};
sigemptyset(&(sig_s.sa_mask));
sig_s.sa_handler = SIG_IGN;
sigaction(SIGPROF, &sig_s, 0);
}
#endif
}
}
/* u3t_slog_cap(): slog a tank with a caption with
** a given priority c3_l (assumed 0-3).
*/
void
u3t_slog_cap(c3_l pri_l, u3_noun cap, u3_noun tan)
{
u3t_slog(
u3nc(
pri_l,
u3nt(
c3__rose,
u3nt(u3nt(':', ' ', u3_nul), u3_nul, u3_nul),
u3nt(cap, tan, u3_nul)
)
)
);
}
/* u3t_slog_trace(): given a c3_l priority pri and a raw stack tax
** flop the order into start-to-end, render, and slog each item
** until done.
*/
void
u3t_slog_trace(c3_l pri_l, u3_noun tax)
{
// render the stack
// Note: ton is a reference to a data struct
// we have just allocated
// lit is used as a moving cursor pointer through
// that allocated struct
// once we finish lit will be null, but ton will still
// point to the whole valid allocated data structure
// and thus we can free it safely at the end of the func
// to clean up after ourselves.
// Note: flop reverses the stack trace list 'tax'
u3_noun ton = u3dc("mook", 2, u3kb_flop(tax));
u3_noun lit = u3t(ton);
// print the stack one stack item at a time
while ( u3_nul != lit ) {
u3t_slog(u3nc(pri_l, u3k(u3h(lit)) ));
lit = u3t(lit);
}
u3z(ton);
}
/* u3t_slog_nara(): slog only the deepest road's trace with
** c3_l priority pri
*/
void
u3t_slog_nara(c3_l pri_l)
{
u3_noun tax = u3k(u3R->bug.tax);
u3t_slog_trace(pri_l, tax);
}
/* u3t_slog_hela(): join all roads' traces together into one tax
** and pass it to slog_trace along with the given c3_l priority pri_l
*/
void
u3t_slog_hela(c3_l pri_l)
{
// rod_u protects us from mutating the global state
u3_road* rod_u = u3R;
// inits to the the current road's trace
u3_noun tax = u3k(rod_u->bug.tax);
// while there is a parent road ref ...
while ( &(u3H->rod_u) != rod_u ) {
// ... point at the next road and append its stack to tax
rod_u = u3tn(u3_road, rod_u->par_p);
tax = u3kb_weld(tax, u3k(rod_u->bug.tax));
}
u3t_slog_trace(pri_l, tax);
}
/* _ct_roundf(): truncate a float to precision equivalent to %.2f */
static float
_ct_roundf(float per_f)
{
// scale the percentage so that all siginificant digits
// would be retained when truncted to an int, then add 0.5
// to account for rounding without using round or roundf
float big_f = (per_f*10000)+0.5;
// truncate to int
c3_w big_w = (c3_w) big_f;
// convert to float and scale down such that
// our last two digits are right of the decimal
float tuc_f = (float) big_w/100.0;
return tuc_f;
}
/* _ct_meme_percent(): convert two ints into a percentage */
static float
_ct_meme_percent(c3_w lit_w, c3_w big_w)
{
// get the percentage of our inputs as a float
float raw_f = (float) lit_w/big_w;
return _ct_roundf(raw_f);
}
/* _ct_all_heap_size(): return the size in bytes of ALL space on the Loom
** over all roads, currently in use as heap.
*/
static c3_w
_ct_all_heap_size(u3_road* r) {
if (r == &(u3H->rod_u)) {
return u3a_heap(r)*4;
} else {
// recurse
return (u3a_heap(r)*4) + _ct_all_heap_size(u3tn(u3_road, r->par_p));
}
}
/* These two structs, bar_item and bar_info, store the mutable data
** to normalize measured Loom usage values into ints that will fit
** into a fixed width ascii bar chart.
*/
struct
bar_item {
// index
c3_w dex_w;
// lower bound
c3_w low_w;
// original value
float ori_f;
// difference
float dif_f;
};
struct
bar_info {
struct bar_item s[6];
};
/* _ct_boost_small(): we want zero to be zero,
** anything between zero and one to be one,
** and all else to be whatever it is.
*/
static float
_ct_boost_small(float num_f)
{
return
0.0 >= num_f ? 0.0:
1.0 > num_f ? 1.0:
num_f;
}
/* _ct_global_difference(): each low_w represents the normalized integer value
* of its loom item, and ideally the sum of all loom low_w
* values should be 100. This function reports how far from
* the ideal bar_u is.
*/
static c3_ws
_ct_global_difference(struct bar_info bar_u)
{
c3_w low_w = 0;
for (c3_w i=0; i < 6; i++) {
low_w += bar_u.s[i].low_w;
}
return 100 - low_w;
}
/* _ct_compute_roundoff_error(): for each loom item in bar_u
** compute the current difference between the int
** size and the original float size.
*/
static struct bar_info
_ct_compute_roundoff_error(struct bar_info bar_u)
{
for (c3_w i=0; i < 6; i++) {
bar_u.s[i].dif_f = bar_u.s[i].ori_f - bar_u.s[i].low_w;
}
return bar_u;
}
/* _ct_sort_by_roundoff_error(): sort loom items from most mis-sized to least */
static struct bar_info
_ct_sort_by_roundoff_error(struct bar_info bar_u)
{
struct bar_item tem_u;
for (c3_w i=1; i < 6; i++) {
for (c3_w j=0; j < 6-i; j++) {
if (bar_u.s[j+1].dif_f > bar_u.s[j].dif_f) {
tem_u = bar_u.s[j];
bar_u.s[j] = bar_u.s[j+1];
bar_u.s[j+1] = tem_u;
}
}
}
return bar_u;
}
/* _ct_sort_by_index(): sort loom items into loom order */
static struct bar_info
_ct_sort_by_index(struct bar_info bar_u)
{
struct bar_item tem_u;
for (c3_w i=1; i < 6; i++) {
for (c3_w j=0; j < 6-i; j++) {
if (bar_u.s[j+1].dex_w < bar_u.s[j].dex_w) {
tem_u = bar_u.s[j];
bar_u.s[j] = bar_u.s[j+1];
bar_u.s[j+1] = tem_u;
}
}
}
return bar_u;
}
/* _ct_reduce_error(): reduce error by one int step
* making oversized things a bit smaller
* and undersized things a bit bigger
*/
static struct bar_info
_ct_reduce_error(struct bar_info bar_u, c3_ws dif_s)
{
for (c3_w i=0; i < 6; i++) {
if (bar_u.s[i].low_w == 0) continue;
if (bar_u.s[i].low_w == 1) continue;
if (dif_s > 0) {
bar_u.s[i].low_w++;
dif_s--;
}
if (dif_s < 0) {
bar_u.s[i].low_w--;
dif_s++;
}
}
return bar_u;
}
/* _ct_report_bargraph(): render all six raw loom elements into a fixed-size ascii bargraph */
static void
_ct_report_bargraph(
c3_c bar_c[105], float hip_f, float hep_f, float fre_f, float pen_f, float tak_f, float tik_f
)
{
float in[6];
in[0] = _ct_boost_small(hip_f);
in[1] = _ct_boost_small(hep_f);
in[2] = _ct_boost_small(fre_f);
in[3] = _ct_boost_small(pen_f);
in[4] = _ct_boost_small(tak_f);
in[5] = _ct_boost_small(tik_f);
// init the list of structs
struct bar_info bar_u;
for (c3_w i=0; i < 6; i++) {
bar_u.s[i].dex_w = i;
bar_u.s[i].ori_f = in[i];
bar_u.s[i].low_w = (c3_w) bar_u.s[i].ori_f;
}
// repeatedly adjust for roundoff error
// until it is elemenated or we go 100 cycles
c3_ws dif_s = 0;
for (c3_w x=0; x<100; x++) {
bar_u = _ct_compute_roundoff_error(bar_u);
dif_s = _ct_global_difference(bar_u);
if (dif_s == 0) break;
bar_u = _ct_sort_by_roundoff_error(bar_u);
bar_u = _ct_reduce_error(bar_u, dif_s);
}
bar_u = _ct_sort_by_index(bar_u);
for (c3_w x=1; x<104; x++) {
bar_c[x] = ' ';
}
bar_c[0] = '[';
// create our bar chart
const c3_c sym_c[6] = "=-%#+~";
c3_w x = 0, y = 0;
for (c3_w i=0; i < 6; i++) {
x++;
for (c3_w j=0; j < bar_u.s[i].low_w; j++) {
bar_c[x+j] = sym_c[i];
y = x+j;
}
if (y > 0) x = y;
}
bar_c[101] = ']';
bar_c[102] = 0;
}
/* _ct_size_prefix(): return the correct metric scalar prifix for a given int */
static c3_c
_ct_size_prefix(c3_d num_d)
{
return
(num_d / 1000000000) ? 'G':
(num_d % 1000000000) / 1000000 ? 'M':
(num_d % 1000000) / 1000 ? 'K':
(num_d % 1000) ? ' ':
'X';
}
/* _ct_report_string(): convert a int into a string, adding a metric scale prefix letter*/
static void
_ct_report_string(c3_c rep_c[32], c3_d num_d)
{
memset(rep_c, ' ', 31);
// add the G/M/K prefix
rep_c[24] = _ct_size_prefix(num_d);
// consume wor_w into a string one base-10 digit at a time
// including dot formatting
c3_w i = 0, j = 0;
while (num_d > 0) {
if (j == 3) {
rep_c[22-i] = '.';
i++;
j = 0;
} else {
rep_c[22-i] = (num_d%10)+'0';
num_d /= 10;
i++;
j++;
}
}
}
/* _ct_etch_road_depth(): return a the current road depth as a fixed size string */
static void
_ct_etch_road_depth(c3_c rep_c[32], u3_road* r, c3_w num_w) {
if (r == &(u3H->rod_u)) {
_ct_report_string(rep_c, num_w);
// this will be incorrectly indented, so we fix that here
c3_w i = 14;
while (i > 0) {
rep_c[i] = rep_c[i+16];
rep_c[i+16] = ' ';
i--;
}
} else {
_ct_etch_road_depth(rep_c, u3tn(u3_road, r->par_p), ++num_w);
}
}
/* _ct_etch_memory(): create a single line report of a given captioned item
* with a percentage of space used and the bytes used
* scaled by a metric scaling postfix (ie MB, GB, etc)
*/
static void
_ct_etch_memory(c3_c rep_c[32], float per_f, c3_w num_w)
{
// create the basic report string
_ct_report_string(rep_c, num_w);
// add the Bytes postfix to the size report
rep_c[25] = 'B';