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