aboutsummaryrefslogtreecommitdiff
path: root/libbb/progress.c
blob: df43dad5cbae3d0cb4ca9bfd1f448a924067c354 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
/* vi: set sw=4 ts=4: */
/*
 * Progress bar code.
 */
/* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
 * much of which was blatantly stolen from openssh.
 */
/*-
 * Copyright (c) 1992, 1993
 * The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. BSD Advertising Clause omitted per the July 22, 1999 licensing change
 *    ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
 *
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#include "libbb.h"
#include "unicode.h"

enum {
	/* Seconds when xfer considered "stalled" */
	STALLTIME = 5
};

static unsigned int get_tty2_width(void)
{
	unsigned width;
	get_terminal_width_height(2, &width, NULL);
	return width;
}

void FAST_FUNC bb_progress_init(bb_progress_t *p, const char *curfile)
{
#if ENABLE_UNICODE_SUPPORT
	init_unicode();
	p->curfile = unicode_conv_to_printable_fixedwidth(/*NULL,*/ curfile, 20);
#else
	p->curfile = curfile;
#endif
	p->start_sec = monotonic_sec();
	p->last_update_sec = p->start_sec;
	p->last_change_sec = p->start_sec;
	p->last_size = 0;
}

/* File already had beg_size bytes.
 * Then we started downloading.
 * We downloaded "transferred" bytes so far.
 * Download is expected to stop when total size (beg_size + transferred)
 * will be "totalsize" bytes.
 * If totalsize == 0, then it is unknown.
 */
void FAST_FUNC bb_progress_update(bb_progress_t *p,
		uoff_t beg_size,
		uoff_t transferred,
		uoff_t totalsize)
{
	uoff_t beg_and_transferred;
	unsigned since_last_update, elapsed;
	int barlength;
	int kiloscale;

	//transferred = 1234; /* use for stall detection testing */
	//totalsize = 0; /* use for unknown size download testing */

	elapsed = monotonic_sec();
	since_last_update = elapsed - p->last_update_sec;
	p->last_update_sec = elapsed;

	if (totalsize != 0 && transferred >= totalsize - beg_size) {
		/* Last call. Do not skip this update */
		transferred = totalsize - beg_size; /* sanitize just in case */
	}
	else if (since_last_update == 0) {
		/*
		 * Do not update on every call
		 * (we can be called on every network read!)
		 */
		return;
	}

	kiloscale = 0;
	/*
	 * Scale sizes down if they are close to overflowing.
	 * This allows calculations like (100 * transferred / totalsize)
	 * without risking overflow: we guarantee 10 highest bits to be 0.
	 * Introduced error is less than 1 / 2^12 ~= 0.025%
	 */
	if (ULONG_MAX > 0xffffffff || sizeof(off_t) == 4 || sizeof(off_t) != 8) {
		/*
		 * 64-bit CPU || small off_t: in either case,
		 * >> is cheap, single-word operation.
		 * ... || strange off_t: also use this code
		 * (it is safe, just suboptimal wrt code size),
		 * because 32/64 optimized one works only for 64-bit off_t.
		 */
		if (totalsize >= (1 << 22)) {
			totalsize >>= 10;
			beg_size >>= 10;
			transferred >>= 10;
			kiloscale = 1;
		}
	} else {
		/* 32-bit CPU and 64-bit off_t.
		 * Use a 40-bit shift, it is easier to do on 32-bit CPU.
		 */
		if (totalsize >= (uoff_t)(1ULL << 54)) {
			totalsize = (uint32_t)(totalsize >> 32) >> 8;
			beg_size = (uint32_t)(beg_size >> 32) >> 8;
			transferred = (uint32_t)(transferred >> 32) >> 8;
			kiloscale = 4;
		}
	}

	if (ENABLE_UNICODE_SUPPORT)
		fprintf(stderr, "\r%s", p->curfile);
	else
		fprintf(stderr, "\r%-20.20s", p->curfile);

	beg_and_transferred = beg_size + transferred;

	if (totalsize != 0) {
		unsigned ratio = 100 * beg_and_transferred / totalsize;
		fprintf(stderr, "%4u%%", ratio);

		barlength = get_tty2_width() - 49;
		if (barlength > 0) {
			/* god bless gcc for variable arrays :) */
			char buf[barlength + 1];
			unsigned stars = (unsigned)barlength * beg_and_transferred / totalsize;
			memset(buf, ' ', barlength);
			buf[barlength] = '\0';
			memset(buf, '*', stars);
			fprintf(stderr, " |%s|", buf);
		}
	}

	while (beg_and_transferred >= 100000) {
		beg_and_transferred >>= 10;
		kiloscale++;
	}
	/* see http://en.wikipedia.org/wiki/Tera */
	fprintf(stderr, "%6u%c", (unsigned)beg_and_transferred, " kMGTPEZY"[kiloscale]);
#define beg_and_transferred dont_use_beg_and_transferred_below()

	since_last_update = elapsed - p->last_change_sec;
	if ((unsigned)transferred != p->last_size) {
		p->last_change_sec = elapsed;
		p->last_size = (unsigned)transferred;
		if (since_last_update >= STALLTIME) {
			/* We "cut out" these seconds from elapsed time
			 * by adjusting start time */
			p->start_sec += since_last_update;
		}
		since_last_update = 0; /* we are un-stalled now */
	}

	elapsed -= p->start_sec; /* now it's "elapsed since start" */

	if (since_last_update >= STALLTIME) {
		fprintf(stderr, "  - stalled -");
	} else if (!totalsize || !transferred || (int)elapsed < 0) {
		fprintf(stderr, " --:--:-- ETA");
	} else {
		unsigned eta, secs, hours;

		totalsize -= beg_size; /* now it's "total to upload" */

		/* Estimated remaining time =
		 * estimated_sec_to_dl_totalsize_bytes - elapsed_sec =
		 * totalsize / average_bytes_sec_so_far - elapsed =
		 * totalsize / (transferred/elapsed) - elapsed =
		 * totalsize * elapsed / transferred - elapsed
		 */
		eta = totalsize * elapsed / transferred - elapsed;
		if (eta >= 1000*60*60)
			eta = 1000*60*60 - 1;
		secs = eta % 3600;
		hours = eta / 3600;
		fprintf(stderr, "%3u:%02u:%02u ETA", hours, secs / 60, secs % 60);
	}
}