208 lines
6.7 KiB
C
208 lines
6.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Progress bar code.
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*/
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/* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
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* much of which was blatantly stolen from openssh.
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*/
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. BSD Advertising Clause omitted per the July 22, 1999 licensing change
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* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
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*
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "libbb.h"
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#include "unicode.h"
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enum {
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/* Seconds when xfer considered "stalled" */
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STALLTIME = 5
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};
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static unsigned int get_tty2_width(void)
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{
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unsigned width;
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get_terminal_width_height(2, &width, NULL);
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return width;
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}
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void FAST_FUNC bb_progress_init(bb_progress_t *p, const char *curfile)
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{
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#if ENABLE_UNICODE_SUPPORT
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init_unicode();
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p->curfile = unicode_conv_to_printable_fixedwidth(/*NULL,*/ curfile, 20);
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#else
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p->curfile = curfile;
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#endif
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p->start_sec = monotonic_sec();
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p->last_update_sec = p->start_sec;
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p->last_change_sec = p->start_sec;
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p->last_size = 0;
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}
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/* File already had beg_size bytes.
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* Then we started downloading.
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* We downloaded "transferred" bytes so far.
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* Download is expected to stop when total size (beg_size + transferred)
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* will be "totalsize" bytes.
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* If totalsize == 0, then it is unknown.
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*/
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void FAST_FUNC bb_progress_update(bb_progress_t *p,
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uoff_t beg_size,
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uoff_t transferred,
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uoff_t totalsize)
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{
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uoff_t beg_and_transferred;
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unsigned since_last_update, elapsed;
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int barlength;
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int kiloscale;
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//transferred = 1234; /* use for stall detection testing */
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//totalsize = 0; /* use for unknown size download testing */
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elapsed = monotonic_sec();
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since_last_update = elapsed - p->last_update_sec;
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p->last_update_sec = elapsed;
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if (totalsize != 0 && transferred >= totalsize - beg_size) {
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/* Last call. Do not skip this update */
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transferred = totalsize - beg_size; /* sanitize just in case */
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}
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else if (since_last_update == 0) {
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/*
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* Do not update on every call
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* (we can be called on every network read!)
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*/
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return;
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}
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kiloscale = 0;
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/*
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* Scale sizes down if they are close to overflowing.
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* This allows calculations like (100 * transferred / totalsize)
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* without risking overflow: we guarantee 10 highest bits to be 0.
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* Introduced error is less than 1 / 2^12 ~= 0.025%
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*/
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if (ULONG_MAX > 0xffffffff || sizeof(off_t) == 4 || sizeof(off_t) != 8) {
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/*
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* 64-bit CPU || small off_t: in either case,
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* >> is cheap, single-word operation.
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* ... || strange off_t: also use this code
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* (it is safe, just suboptimal wrt code size),
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* because 32/64 optimized one works only for 64-bit off_t.
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*/
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if (totalsize >= (1 << 22)) {
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totalsize >>= 10;
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beg_size >>= 10;
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transferred >>= 10;
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kiloscale = 1;
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}
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} else {
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/* 32-bit CPU and 64-bit off_t.
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* Use a 40-bit shift, it is easier to do on 32-bit CPU.
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*/
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/* ONE suppresses "warning: shift count >= width of type" */
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#define ONE (sizeof(off_t) > 4)
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if (totalsize >= (uoff_t)(1ULL << 54*ONE)) {
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totalsize = (uint32_t)(totalsize >> 32*ONE) >> 8;
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beg_size = (uint32_t)(beg_size >> 32*ONE) >> 8;
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transferred = (uint32_t)(transferred >> 32*ONE) >> 8;
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kiloscale = 4;
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}
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}
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if (ENABLE_UNICODE_SUPPORT)
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fprintf(stderr, "\r%s", p->curfile);
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else
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fprintf(stderr, "\r%-20.20s", p->curfile);
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beg_and_transferred = beg_size + transferred;
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if (totalsize != 0) {
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unsigned ratio = 100 * beg_and_transferred / totalsize;
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fprintf(stderr, "%4u%%", ratio);
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barlength = get_tty2_width() - 49;
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if (barlength > 0) {
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/* god bless gcc for variable arrays :) */
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char buf[barlength + 1];
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unsigned stars = (unsigned)barlength * beg_and_transferred / totalsize;
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memset(buf, ' ', barlength);
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buf[barlength] = '\0';
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memset(buf, '*', stars);
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fprintf(stderr, " |%s|", buf);
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}
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}
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while (beg_and_transferred >= 100000) {
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beg_and_transferred >>= 10;
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kiloscale++;
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}
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/* see http://en.wikipedia.org/wiki/Tera */
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fprintf(stderr, "%6u%c", (unsigned)beg_and_transferred, " kMGTPEZY"[kiloscale]);
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#define beg_and_transferred dont_use_beg_and_transferred_below()
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since_last_update = elapsed - p->last_change_sec;
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if ((unsigned)transferred != p->last_size) {
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p->last_change_sec = elapsed;
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p->last_size = (unsigned)transferred;
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if (since_last_update >= STALLTIME) {
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/* We "cut out" these seconds from elapsed time
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* by adjusting start time */
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p->start_sec += since_last_update;
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}
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since_last_update = 0; /* we are un-stalled now */
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}
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elapsed -= p->start_sec; /* now it's "elapsed since start" */
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if (since_last_update >= STALLTIME) {
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fprintf(stderr, " - stalled -");
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} else if (!totalsize || !transferred || (int)elapsed < 0) {
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fprintf(stderr, " --:--:-- ETA");
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} else {
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unsigned eta, secs, hours;
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totalsize -= beg_size; /* now it's "total to upload" */
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/* Estimated remaining time =
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* estimated_sec_to_dl_totalsize_bytes - elapsed_sec =
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* totalsize / average_bytes_sec_so_far - elapsed =
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* totalsize / (transferred/elapsed) - elapsed =
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* totalsize * elapsed / transferred - elapsed
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*/
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eta = totalsize * elapsed / transferred - elapsed;
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if (eta >= 1000*60*60)
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eta = 1000*60*60 - 1;
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secs = eta % 3600;
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hours = eta / 3600;
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fprintf(stderr, "%3u:%02u:%02u ETA", hours, secs / 60, secs % 60);
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}
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}
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