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1 /*      $NetBSD: progressbar.c,v 1.21 2009/04/12 10:18:52 lukem Exp $   */
2
3 /*-
4  * Copyright (c) 1997-2009 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Luke Mewburn.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31
32 #include <sys/types.h>
33 #include <sys/param.h>
34 #include <sys/ioctl.h>
35
36 #include <errno.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <termios.h>
41 #include <time.h>
42 #include <unistd.h>
43
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
46
47 #include "progress.h"
48
49 static const char * const suffixes[] = {
50         "",     /* 2^0  (byte) */
51         "KiB",  /* 2^10 Kibibyte */
52         "MiB",  /* 2^20 Mebibyte */
53         "GiB",  /* 2^30 Gibibyte */
54         "TiB",  /* 2^40 Tebibyte */
55         "PiB",  /* 2^50 Pebibyte */
56         "EiB",  /* 2^60 Exbibyte */
57 };
58
59 #define NSUFFIXES       (sizeof(suffixes) / sizeof(suffixes[0]))
60 #define SECSPERHOUR     (60 * 60)
61 #define DEFAULT_TTYWIDTH        80
62
63 /* initialise progress meter structure */
64 int
65 progress_init(progress_t *prog, const char *prefix, uint64_t total)
66 {
67         struct winsize  winsize;
68         int             oerrno = errno;
69
70         (void) memset(prog, 0x0, sizeof(*prog));
71         prog->size = total;
72         prog->prefix = strdup(prefix);
73         prog->start = time(NULL);
74         if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 &&
75             winsize.ws_col != 0) {
76                 prog->ttywidth = winsize.ws_col;
77         } else {
78                 prog->ttywidth = DEFAULT_TTYWIDTH;
79         }
80         errno = oerrno;
81         return 1;
82 }
83
84 /* update the values in the progress meter */
85 int
86 progress_update(progress_t *prog, uint64_t done)
87 {
88         prog->done = done;
89         prog->percent = (prog->done * 100) / prog->size;
90         prog->now = time(NULL);
91         prog->elapsed = prog->now - prog->start;
92         if (done == 0 || prog->elapsed == 0 || prog->done / prog->elapsed == 0) {
93                 prog->eta = 0;
94         } else {
95                 prog->eta = prog->size / (prog->done / prog->elapsed) - prog->elapsed;
96         }
97         return 1;
98 }
99
100 /* update the values in the progress meter */
101 int
102 progress_reset_size(progress_t *prog, uint64_t size)
103 {
104         prog->size = size;
105         return 1;
106 }
107
108 /* make it look pretty at the end - display done bytes (usually total) */
109 int
110 progress_complete(progress_t *prog, uint64_t done)
111 {
112         progress_update(prog, done);
113         progress_draw(prog);
114         printf("\n");
115         return 1;
116 }
117
118 /* draw the progress meter */
119 int
120 progress_draw(progress_t *prog)
121 {
122 #define BAROVERHEAD     45              /* non `*' portion of progress bar */
123                                         /*
124                                          * stars should contain at least
125                                          * sizeof(buf) - BAROVERHEAD entries
126                                          */
127         static const char       stars[] =
128 "*****************************************************************************"
129 "*****************************************************************************"
130 "*****************************************************************************";
131         unsigned                bytesabbrev;
132         unsigned                bpsabbrev;
133         int64_t                 secs;
134         uint64_t                bytespersec;
135         uint64_t                abbrevsize;
136         int64_t                 secsleft;
137         size_t                  barlength;
138         size_t                  starc;
139         char                    hours[12];
140         char                    buf[256];
141         int                     len;
142
143         barlength = MIN(sizeof(buf) - 1, (unsigned)prog->ttywidth) - BAROVERHEAD - strlen(prog->prefix);
144         starc = (barlength * prog->percent) / 100;
145         abbrevsize = prog->done;
146         for (bytesabbrev = 0; abbrevsize >= 100000 && bytesabbrev < NSUFFIXES; bytesabbrev++) {
147                 abbrevsize >>= 10;
148         }
149         if (bytesabbrev == NSUFFIXES) {
150                 bytesabbrev--;
151         }
152         bytespersec = 0;
153         if (prog->done > 0) {
154                 bytespersec = prog->done;
155                 if (prog->elapsed > 0) {
156                         bytespersec /= prog->elapsed;
157                 }
158         }
159         for (bpsabbrev = 1; bytespersec >= 1024000 && bpsabbrev < NSUFFIXES; bpsabbrev++) {
160                 bytespersec >>= 10;
161         }
162         if (prog->done == 0 || prog->elapsed <= 0 || prog->done > prog->size) {
163                 secsleft = 0;
164         } else {
165                 secsleft = prog->eta;
166         }
167         if ((secs = secsleft / SECSPERHOUR) > 0) {
168                 (void) snprintf(hours, sizeof(hours), "%2lld:", (long long)secs);
169         } else {
170                 (void) snprintf(hours, sizeof(hours), "   ");
171         }
172         secs = secsleft % SECSPERHOUR;
173         len = snprintf(buf, sizeof(buf),
174                 "\r%s %3lld%% |%.*s%*s| %5lld %-3s %3lld.%02d %.2sB/s %s%02d:%02d ETA",
175                 (prog->prefix) ? prog->prefix : "",
176                 (long long)prog->percent,
177                 (int)starc, stars, (int)(barlength - starc), "",
178                 (long long)abbrevsize,
179                 suffixes[bytesabbrev],
180                 (long long)(bytespersec / 1024),
181                 (int)((bytespersec % 1024) * 100 / 1024),
182                 suffixes[bpsabbrev],
183                 hours,
184                 (int)secs / 60, (int)secs % 60);
185         return (int)write(STDOUT_FILENO, buf, len);
186 }