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ea72194650
curl/lib/progress.c
Yang Tse 3f56d12830 avoid division by zero
2009-11-05 15:00:28 +00:00

450 lines
16 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/
#include "setup.h"
#include "urldata.h"
#include "sendf.h"
#include "progress.h"
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
/* Provide a string that is 2 + 1 + 2 + 1 + 2 = 8 letters long (plus the zero
byte) */
static void time2str(char *r, curl_off_t seconds)
{
curl_off_t d, h, m, s;
if(seconds <= 0) {
strcpy(r, "--:--:--");
return;
}
h = seconds / CURL_OFF_T_C(3600);
if(h <= CURL_OFF_T_C(99)) {
m = (seconds - (h*CURL_OFF_T_C(3600))) / CURL_OFF_T_C(60);
s = (seconds - (h*CURL_OFF_T_C(3600))) - (m*CURL_OFF_T_C(60));
snprintf(r, 9, "%2" FORMAT_OFF_T ":%02" FORMAT_OFF_T ":%02" FORMAT_OFF_T,
h, m, s);
}
else {
/* this equals to more than 99 hours, switch to a more suitable output
format to fit within the limits. */
d = seconds / CURL_OFF_T_C(86400);
h = (seconds - (d*CURL_OFF_T_C(86400))) / CURL_OFF_T_C(3600);
if(d <= CURL_OFF_T_C(999))
snprintf(r, 9, "%3" FORMAT_OFF_T "d %02" FORMAT_OFF_T "h", d, h);
else
snprintf(r, 9, "%7" FORMAT_OFF_T "d", d);
}
}
/* The point of this function would be to return a string of the input data,
but never longer than 5 columns (+ one zero byte).
Add suffix k, M, G when suitable... */
static char *max5data(curl_off_t bytes, char *max5)
{
#define ONE_KILOBYTE CURL_OFF_T_C(1024)
#define ONE_MEGABYTE (CURL_OFF_T_C(1024) * ONE_KILOBYTE)
#define ONE_GIGABYTE (CURL_OFF_T_C(1024) * ONE_MEGABYTE)
#define ONE_TERABYTE (CURL_OFF_T_C(1024) * ONE_GIGABYTE)
#define ONE_PETABYTE (CURL_OFF_T_C(1024) * ONE_TERABYTE)
if(bytes < CURL_OFF_T_C(100000))
snprintf(max5, 6, "%5" FORMAT_OFF_T, bytes);
else if(bytes < CURL_OFF_T_C(10000) * ONE_KILOBYTE)
snprintf(max5, 6, "%4" FORMAT_OFF_T "k", bytes/ONE_KILOBYTE);
else if(bytes < CURL_OFF_T_C(100) * ONE_MEGABYTE)
/* 'XX.XM' is good as long as we're less than 100 megs */
snprintf(max5, 6, "%2" FORMAT_OFF_T ".%0" FORMAT_OFF_T "M",
bytes/ONE_MEGABYTE,
(bytes%ONE_MEGABYTE) / (ONE_MEGABYTE/CURL_OFF_T_C(10)) );
#if (CURL_SIZEOF_CURL_OFF_T > 4)
else if(bytes < CURL_OFF_T_C(10000) * ONE_MEGABYTE)
/* 'XXXXM' is good until we're at 10000MB or above */
snprintf(max5, 6, "%4" FORMAT_OFF_T "M", bytes/ONE_MEGABYTE);
else if(bytes < CURL_OFF_T_C(100) * ONE_GIGABYTE)
/* 10000 MB - 100 GB, we show it as XX.XG */
snprintf(max5, 6, "%2" FORMAT_OFF_T ".%0" FORMAT_OFF_T "G",
bytes/ONE_GIGABYTE,
(bytes%ONE_GIGABYTE) / (ONE_GIGABYTE/CURL_OFF_T_C(10)) );
else if(bytes < CURL_OFF_T_C(10000) * ONE_GIGABYTE)
/* up to 10000GB, display without decimal: XXXXG */
snprintf(max5, 6, "%4" FORMAT_OFF_T "G", bytes/ONE_GIGABYTE);
else if(bytes < CURL_OFF_T_C(10000) * ONE_TERABYTE)
/* up to 10000TB, display without decimal: XXXXT */
snprintf(max5, 6, "%4" FORMAT_OFF_T "T", bytes/ONE_TERABYTE);
else
/* up to 10000PB, display without decimal: XXXXP */
snprintf(max5, 6, "%4" FORMAT_OFF_T "P", bytes/ONE_PETABYTE);
/* 16384 petabytes (16 exabytes) is the maximum a 64 bit unsigned number
can hold, but our data type is signed so 8192PB will be the maximum. */
#else
else
snprintf(max5, 6, "%4" FORMAT_OFF_T "M", bytes/ONE_MEGABYTE);
#endif
return max5;
}
/*
New proposed interface, 9th of February 2000:
pgrsStartNow() - sets start time
pgrsSetDownloadSize(x) - known expected download size
pgrsSetUploadSize(x) - known expected upload size
pgrsSetDownloadCounter() - amount of data currently downloaded
pgrsSetUploadCounter() - amount of data currently uploaded
pgrsUpdate() - show progress
pgrsDone() - transfer complete
*/
void Curl_pgrsDone(struct connectdata *conn)
{
struct SessionHandle *data = conn->data;
data->progress.lastshow=0;
Curl_pgrsUpdate(conn); /* the final (forced) update */
data->progress.speeder_c = 0; /* reset the progress meter display */
}
/* reset all times except redirect */
void Curl_pgrsResetTimes(struct SessionHandle *data)
{
data->progress.t_nslookup = 0.0;
data->progress.t_connect = 0.0;
data->progress.t_pretransfer = 0.0;
data->progress.t_starttransfer = 0.0;
}
void Curl_pgrsTime(struct SessionHandle *data, timerid timer)
{
switch(timer) {
default:
case TIMER_NONE:
/* mistake filter */
break;
case TIMER_STARTSINGLE:
/* This is set at the start of a single fetch */
data->progress.t_startsingle = Curl_tvnow();
break;
case TIMER_NAMELOOKUP:
data->progress.t_nslookup =
Curl_tvdiff_secs(Curl_tvnow(), data->progress.t_startsingle);
break;
case TIMER_CONNECT:
data->progress.t_connect =
Curl_tvdiff_secs(Curl_tvnow(), data->progress.t_startsingle);
break;
case TIMER_APPCONNECT:
data->progress.t_appconnect =
Curl_tvdiff_secs(Curl_tvnow(), data->progress.t_startsingle);
break;
case TIMER_PRETRANSFER:
data->progress.t_pretransfer =
Curl_tvdiff_secs(Curl_tvnow(), data->progress.t_startsingle);
break;
case TIMER_STARTTRANSFER:
data->progress.t_starttransfer =
Curl_tvdiff_secs(Curl_tvnow(), data->progress.t_startsingle);
break;
case TIMER_POSTRANSFER:
/* this is the normal end-of-transfer thing */
break;
case TIMER_REDIRECT:
data->progress.t_redirect =
Curl_tvdiff_secs(Curl_tvnow(), data->progress.start);
break;
}
}
void Curl_pgrsStartNow(struct SessionHandle *data)
{
data->progress.speeder_c = 0; /* reset the progress meter display */
data->progress.start = Curl_tvnow();
}
void Curl_pgrsSetDownloadCounter(struct SessionHandle *data, curl_off_t size)
{
data->progress.downloaded = size;
}
void Curl_pgrsSetUploadCounter(struct SessionHandle *data, curl_off_t size)
{
data->progress.uploaded = size;
}
void Curl_pgrsSetDownloadSize(struct SessionHandle *data, curl_off_t size)
{
data->progress.size_dl = size;
if(size >= 0)
data->progress.flags |= PGRS_DL_SIZE_KNOWN;
else
data->progress.flags &= ~PGRS_DL_SIZE_KNOWN;
}
void Curl_pgrsSetUploadSize(struct SessionHandle *data, curl_off_t size)
{
data->progress.size_ul = size;
if(size >= 0)
data->progress.flags |= PGRS_UL_SIZE_KNOWN;
else
data->progress.flags &= ~PGRS_UL_SIZE_KNOWN;
}
int Curl_pgrsUpdate(struct connectdata *conn)
{
struct timeval now;
int result;
char max5[6][10];
curl_off_t dlpercen=0;
curl_off_t ulpercen=0;
curl_off_t total_percen=0;
curl_off_t total_transfer;
curl_off_t total_expected_transfer;
curl_off_t timespent;
struct SessionHandle *data = conn->data;
int nowindex = data->progress.speeder_c% CURR_TIME;
int checkindex;
int countindex; /* amount of seconds stored in the speeder array */
char time_left[10];
char time_total[10];
char time_spent[10];
curl_off_t ulestimate=0;
curl_off_t dlestimate=0;
curl_off_t total_estimate;
bool shownow=FALSE;
now = Curl_tvnow(); /* what time is it */
/* The time spent so far (from the start) */
data->progress.timespent =
(double)(now.tv_sec - data->progress.start.tv_sec) +
(double)(now.tv_usec - data->progress.start.tv_usec)/1000000.0;
timespent = (curl_off_t)data->progress.timespent;
/* The average download speed this far */
data->progress.dlspeed = (curl_off_t)
((double)data->progress.downloaded/
(data->progress.timespent>0?data->progress.timespent:1));
/* The average upload speed this far */
data->progress.ulspeed = (curl_off_t)
((double)data->progress.uploaded/
(data->progress.timespent>0?data->progress.timespent:1));
/* Calculations done at most once a second, unless end is reached */
if(data->progress.lastshow != (long)now.tv_sec) {
shownow = TRUE;
data->progress.lastshow = now.tv_sec;
/* Let's do the "current speed" thing, which should use the fastest
of the dl/ul speeds. Store the faster speed at entry 'nowindex'. */
data->progress.speeder[ nowindex ] =
data->progress.downloaded>data->progress.uploaded?
data->progress.downloaded:data->progress.uploaded;
/* remember the exact time for this moment */
data->progress.speeder_time [ nowindex ] = now;
/* advance our speeder_c counter, which is increased every time we get
here and we expect it to never wrap as 2^32 is a lot of seconds! */
data->progress.speeder_c++;
/* figure out how many index entries of data we have stored in our speeder
array. With N_ENTRIES filled in, we have about N_ENTRIES-1 seconds of
transfer. Imagine, after one second we have filled in two entries,
after two seconds we've filled in three entries etc. */
countindex = ((data->progress.speeder_c>=CURR_TIME)?
CURR_TIME:data->progress.speeder_c) - 1;
/* first of all, we don't do this if there's no counted seconds yet */
if(countindex) {
long span_ms;
/* Get the index position to compare with the 'nowindex' position.
Get the oldest entry possible. While we have less than CURR_TIME
entries, the first entry will remain the oldest. */
checkindex = (data->progress.speeder_c>=CURR_TIME)?
data->progress.speeder_c%CURR_TIME:0;
/* Figure out the exact time for the time span */
span_ms = Curl_tvdiff(now,
data->progress.speeder_time[checkindex]);
if(0 == span_ms)
span_ms=1; /* at least one millisecond MUST have passed */
/* Calculate the average speed the last 'span_ms' milliseconds */
{
curl_off_t amount = data->progress.speeder[nowindex]-
data->progress.speeder[checkindex];
if(amount > CURL_OFF_T_C(4294967) /* 0xffffffff/1000 */)
/* the 'amount' value is bigger than would fit in 32 bits if
multiplied with 1000, so we use the double math for this */
data->progress.current_speed = (curl_off_t)
((double)amount/((double)span_ms/1000.0));
else
/* the 'amount' value is small enough to fit within 32 bits even
when multiplied with 1000 */
data->progress.current_speed = amount*CURL_OFF_T_C(1000)/span_ms;
}
}
else
/* the first second we use the main average */
data->progress.current_speed =
(data->progress.ulspeed>data->progress.dlspeed)?
data->progress.ulspeed:data->progress.dlspeed;
} /* Calculations end */
if(!(data->progress.flags & PGRS_HIDE)) {
/* progress meter has not been shut off */
if(data->set.fprogress) {
/* There's a callback set, so we call that instead of writing
anything ourselves. This really is the way to go. */
result= data->set.fprogress(data->set.progress_client,
(double)data->progress.size_dl,
(double)data->progress.downloaded,
(double)data->progress.size_ul,
(double)data->progress.uploaded);
if(result)
failf(data, "Callback aborted");
return result;
}
if(!shownow)
/* only show the internal progress meter once per second */
return 0;
/* If there's no external callback set, use internal code to show
progress */
if(!(data->progress.flags & PGRS_HEADERS_OUT)) {
if(data->state.resume_from) {
fprintf(data->set.err,
"** Resuming transfer from byte position %" FORMAT_OFF_T "\n",
data->state.resume_from);
}
fprintf(data->set.err,
" %% Total %% Received %% Xferd Average Speed Time Time Time Current\n"
" Dload Upload Total Spent Left Speed\n");
data->progress.flags |= PGRS_HEADERS_OUT; /* headers are shown */
}
/* Figure out the estimated time of arrival for the upload */
if((data->progress.flags & PGRS_UL_SIZE_KNOWN) &&
(data->progress.ulspeed > CURL_OFF_T_C(0))) {
ulestimate = data->progress.size_ul / data->progress.ulspeed;
if(data->progress.size_ul > CURL_OFF_T_C(10000))
ulpercen = data->progress.uploaded /
(data->progress.size_ul/CURL_OFF_T_C(100));
else if(data->progress.size_ul > CURL_OFF_T_C(0))
ulpercen = (data->progress.uploaded*100) /
data->progress.size_ul;
}
/* ... and the download */
if((data->progress.flags & PGRS_DL_SIZE_KNOWN) &&
(data->progress.dlspeed > CURL_OFF_T_C(0))) {
dlestimate = data->progress.size_dl / data->progress.dlspeed;
if(data->progress.size_dl > CURL_OFF_T_C(10000))
dlpercen = data->progress.downloaded /
(data->progress.size_dl/CURL_OFF_T_C(100));
else if(data->progress.size_dl > CURL_OFF_T_C(0))
dlpercen = (data->progress.downloaded*100) /
data->progress.size_dl;
}
/* Now figure out which of them is slower and use that one for the
total estimate! */
total_estimate = ulestimate>dlestimate?ulestimate:dlestimate;
/* create the three time strings */
time2str(time_left, total_estimate > 0?(total_estimate - timespent):0);
time2str(time_total, total_estimate);
time2str(time_spent, timespent);
/* Get the total amount of data expected to get transfered */
total_expected_transfer =
(data->progress.flags & PGRS_UL_SIZE_KNOWN?
data->progress.size_ul:data->progress.uploaded)+
(data->progress.flags & PGRS_DL_SIZE_KNOWN?
data->progress.size_dl:data->progress.downloaded);
/* We have transfered this much so far */
total_transfer = data->progress.downloaded + data->progress.uploaded;
/* Get the percentage of data transfered so far */
if(total_expected_transfer > CURL_OFF_T_C(10000))
total_percen = total_transfer /
(total_expected_transfer/CURL_OFF_T_C(100));
else if(total_expected_transfer > CURL_OFF_T_C(0))
total_percen = (total_transfer*100) / total_expected_transfer;
fprintf(data->set.err,
"\r"
"%3" FORMAT_OFF_T " %s "
"%3" FORMAT_OFF_T " %s "
"%3" FORMAT_OFF_T " %s %s %s %s %s %s %s",
total_percen, /* 3 letters */ /* total % */
max5data(total_expected_transfer, max5[2]), /* total size */
dlpercen, /* 3 letters */ /* rcvd % */
max5data(data->progress.downloaded, max5[0]), /* rcvd size */
ulpercen, /* 3 letters */ /* xfer % */
max5data(data->progress.uploaded, max5[1]), /* xfer size */
max5data(data->progress.dlspeed, max5[3]), /* avrg dl speed */
max5data(data->progress.ulspeed, max5[4]), /* avrg ul speed */
time_total, /* 8 letters */ /* total time */
time_spent, /* 8 letters */ /* time spent */
time_left, /* 8 letters */ /* time left */
max5data(data->progress.current_speed, max5[5]) /* current speed */
);
/* we flush the output stream to make it appear as soon as possible */
fflush(data->set.err);
} /* !(data->progress.flags & PGRS_HIDE) */
return 0;
}
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