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/* Simple termios based progress bar
*
* Copyright (c) 2012-2015 Joachim Nilsson <troglobit@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <limits.h> /* INT_MAX */
#include <stdio.h>
#include <string.h>
#include "conio.h"
#define SPINNER_THROB ".oOo"
#define SPINNER_PULSAR ".oO°Oo."
#define SPINNER_ARROW "v<^>"
#define SPINNER_STAR ".oO@*"
#define SPINNER_DEFAULT "|/-\\"
static char spinner(char *style)
{
size_t num;
static unsigned int i = 0;
if (!style)
style = SPINNER_DEFAULT;
num = strlen(style);
return style[i++ % num]; /* % Number of states in style */
}
/**
* progress - Advanced ASCII progress bar with spinner
* @percent: Start first call with this set to 0, end with 100
* @max_width: Max width of progress bar, in total characters.
*
* This function draws an advanced ASCII progressbar at the current
* line. It always start from the first column.
*
* The progress bar will hide the cursor if started with @percent 0 and
* show it again at the end, when called with @percent 100.
*
* While being called with the same percentage the spinner will spin,
* to show the user the process hasn't frozen.
*
* If the output TTY cannot interpret control characters, like \r, it is
* advised to instead used the progress_simple() function.
*/
void progress(int percent, int max_width)
{
int i, bar;
/* Adjust for progress bar overhead */
max_width -= 10;
if (0 == percent)
hidecursor();
fprintf(stderr, "\r%3d%% %c [", percent, spinner(NULL));
bar = percent * max_width / 100;
for (i = 0; i < max_width; i++) {
if (i > bar)
fputc(' ', stderr);
else if (i == bar)
fputc('>', stderr);
else
fputc('=', stderr);
}
fprintf(stderr, "]");
if (100 == percent) {
showcursor();
fputc('\n', stderr);
}
}
void progress_simple(int percent)
{
static int last = 1;
int ratio, numout;
if (!percent && last) {
last = 0;
fputs("0% 25% 50% 75% 100%\n"
"|---------+---------+---------+---------|\n"
"|", stderr);
return;
}
ratio = 40 * percent / 100;
numout = ratio - last;
if (ratio <= last)
return;
last = ratio;
while (numout--) {
if (ratio != 40 || numout)
putc('=', stderr);
else
putc('|', stderr);
}
}
#ifdef UNITTEST
#include <stdlib.h> /* atexit() */
#include <unistd.h> /* usleep() */
#define MAX_WIDTH 80
#define msleep(msec) usleep(msec * 1000)
static void bye(void)
{
showcursor();
}
static void testit(int fn, int percent)
{
if (fn)
progress(percent, MAX_WIDTH);
else
progress_simple(percent);
}
static void test(int fn)
{
int i, percent, block = 0, num = 85;
while (block < num) {
percent = block * 100 / num;
for (i = 0; i < 10; i++) {
testit(fn, percent);
msleep(5);
}
block++;
msleep(10);
}
testit(fn, 100);
}
int main(void)
{
atexit(bye);
hidecursor();
printf("\nAdvanced:\n");
test(1);
printf("\nSimple:\n");
test(0);
printf("\n");
return 0;
}
#endif /* UNITTEST */
/**
* Local Variables:
* compile-command: "make V=1 -f progress.mk"
* version-control: t
* indent-tabs-mode: t
* c-file-style: "linux"
* End:
*/
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