1/*
2 * progress.c - Numeric progress meter
3 *
4 * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
5 * 	2003, 2004, 2005 by Theodore Ts'o.
6 *
7 * %Begin-Header%
8 * This file may be redistributed under the terms of the GNU Public
9 * License.
10 * %End-Header%
11 */
12
13#include "ext2fs.h"
14#include "ext2fsP.h"
15
16#include <time.h>
17
18static char spaces[80], backspaces[80];
19static time_t last_update;
20
21static int int_log10(unsigned int arg)
22{
23	int	l;
24
25	for (l=0; arg ; l++)
26		arg = arg / 10;
27	return l;
28}
29
30void ext2fs_numeric_progress_init(ext2_filsys fs,
31				  struct ext2fs_numeric_progress_struct * progress,
32				  const char *label, __u64 max)
33{
34	/*
35	 * The PRINT_PROGRESS flag turns on or off ALL
36	 * progress-related messages, whereas the SKIP_PROGRESS
37	 * environment variable prints the start and end messages but
38	 * not the numeric countdown in the middle.
39	 */
40	if (!(fs->flags & EXT2_FLAG_PRINT_PROGRESS))
41		return;
42
43	memset(spaces, ' ', sizeof(spaces)-1);
44	spaces[sizeof(spaces)-1] = 0;
45	memset(backspaces, '\b', sizeof(backspaces)-1);
46	backspaces[sizeof(backspaces)-1] = 0;
47
48	memset(progress, 0, sizeof(*progress));
49	if (getenv("E2FSPROGS_SKIP_PROGRESS"))
50		progress->skip_progress++;
51
52
53	/*
54	 * Figure out how many digits we need
55	 */
56	progress->max = max;
57	progress->log_max = int_log10(max);
58
59	if (label) {
60		fputs(label, stdout);
61		fflush(stdout);
62	}
63	last_update = 0;
64}
65
66void ext2fs_numeric_progress_update(ext2_filsys fs,
67				    struct ext2fs_numeric_progress_struct * progress,
68				    __u64 val)
69{
70	time_t now;
71
72	if (!(fs->flags & EXT2_FLAG_PRINT_PROGRESS))
73		return;
74	if (progress->skip_progress)
75		return;
76	now = time(0);
77	if (now == last_update)
78		return;
79	last_update = now;
80
81	printf("%*llu/%*llu", progress->log_max, val,
82	       progress->log_max, progress->max);
83	fprintf(stdout, "%.*s", (2*progress->log_max)+1, backspaces);
84}
85
86void ext2fs_numeric_progress_close(ext2_filsys fs,
87				   struct ext2fs_numeric_progress_struct * progress,
88				   const char *message)
89{
90	if (!(fs->flags & EXT2_FLAG_PRINT_PROGRESS))
91		return;
92	fprintf(stdout, "%.*s", (2*progress->log_max)+1, spaces);
93	fprintf(stdout, "%.*s", (2*progress->log_max)+1, backspaces);
94	if (message)
95		fputs(message, stdout);
96}
97