progress(): Very simple ASCII progress bar from troglobit/toolbox@f98c5d0

This patch adds a very simple progress bar I wrote once.  It's revision
f98c5d0 from https://github.com/troglobit/toolbox

Also included in this patch is conio.h, a neat little set of macros for
manipulating your terminal using ANSI escape seequences.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

Makefile

@@ -34,7 +34,7 @@ CPPFLAGS   += -W -Wall
 DISTFILES   = README LICENSE
 HEADERS     = lite.h
 OBJS       := chomp.o copyfile.o dir.o fexist.o fisdir.o fmode.o fsendfile.o
-OBJS       += ifconfig.o makepath.o pidfile.o pidfilefn.o rsync.o
+OBJS       += ifconfig.o makepath.o pidfile.o pidfilefn.o progress.o rsync.o
 OBJS       += strlcpy.o strlcat.o strtonum.o tempfile.o tree.o
 DEPS       := $(OBJS:.o=.d)
 JUNK        = *~ *.bak *.map .*.d *.d DEADJOE semantic.cache *.gdb *.elf core core.*

conio.h

@@ -0,0 +1,81 @@
+/* A conio.h like implementation for VTANSI displays.
+ *
+ * Copyright (c) 2009-2013  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.
+ */
+
+#ifndef CONIO_H_
+#define CONIO_H_
+
+#include <stdio.h>
+
+/* Attributes */
+#define RESETATTR    0
+#define BRIGHT       1
+#define DIM          2
+#define UNDERSCORE   4
+#define BLINK        5           /* May not work on all displays. */
+#define REVERSE      7
+#define HIDDEN       8
+
+/* Colors for text and background */
+#define BLACK        0x0
+#define RED          0x1
+#define GREEN        0x2
+#define BROWN        0x3
+#define BLUE         0x4
+#define MAGENTA      0x5
+#define CYAN         0x6
+#define LIGHTGREY    0x7
+
+#define DARKGREY     0x10
+#define LIGHTRED     0x11
+#define LIGHTGREEN   0x12
+#define YELLOW       0x13
+#define LIGHTBLUE    0x14
+#define LIGHTMAGENTA 0x15
+#define LIGHTCYAN    0x16
+#define WHITE        0x17
+
+/* Esc[2JEsc[1;1H             - Clear screen and move cursor to 1,1 (upper left) pos. */
+#define clrscr()              fputs ("\e[2J\e[1;1H", stdout)
+/* Esc[K                      - Erases from the current cursor position to the end of the current line. */
+#define clreol()              fputs ("\e[K", stdout)
+/* Esc[2K                     - Erases the entire current line. */
+#define delline()             fputs ("\e[2K", stdout)
+/* Esc[Line;ColumnH           - Moves the cursor to the specified position (coordinates) */
+#define gotoxy(x,y)           printf("\e[%d;%dH", y, x)
+/* Esc[?25l (lower case L)    - Hide Cursor */
+#define hidecursor()          fputs ("\e[?25l", stdout)
+/* Esc[?25h (lower case H)    - Show Cursor */
+#define showcursor()          fputs ("\e[?25h", stdout)
+
+/* Esc[Value;...;Valuem       - Set Graphics Mode */
+#define __set_gm(attr,color,val)                                        \
+        if (!color)                                                     \
+                printf("\e[%dm", attr);                                 \
+        else                                                            \
+                printf("\e[%d;%dm", color & 0x10 ? 1 : 0, (color & 0xF) + val)
+#define textattr(attr)        __set_gm(attr, 0, 0)
+#define textcolor(color)      __set_gm(RESETATTR, color, 30)
+#define textbackground(color) __set_gm(RESETATTR, color, 40)
+
+#endif /* CONIO_H_ */
+
+/**
+ * Local Variables:
+ *  version-control: t
+ *  c-file-style: "ellemtel"
+ * End:
+ */

progress.c

@@ -0,0 +1,102 @@
+/* Very simple termios based progress bar
+ *
+ * Copyright (c) 2012, 2013  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 "conio.h"
+
+static char spinner(void)
+{
+	static int i = INT_MAX;
+	char *states = "|/-\\";
+//	char *states = ".oOo";
+//	char *states = ".oO°Oo.";
+//	char *states = "v<^>";
+//	char *states = ".oO@*";
+
+	/* Subtract to get clockwise spinning. */
+	return states[i-- % 4];	/* % Number of states */
+}
+
+void progress(int percent, int max_width)
+{
+	int i, bar = percent * max_width / 100;
+
+	if (0 == percent)
+		hidecursor();
+
+	fprintf(stderr, "\r%3d%% %c [", percent, spinner());
+
+	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);
+	}
+}
+
+#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();
+}
+
+int main(int argc __attribute__((unused)), char const *argv[] __attribute__((unused)))
+{
+	int i, percent, block = 0, num = 85;
+
+	atexit(bye);
+	hidecursor();
+
+	while (block < num) {
+		percent = block * 100 / num;
+		for (i = 0; i < 10; i++) {
+			progress(percent, MAX_WIDTH);
+			msleep(2);
+		}
+		block++;
+		msleep(50);
+	}
+	progress(100, MAX_WIDTH);
+
+	return 0;
+}
+#endif	/* UNITTEST */
+
+/**
+ * Local Variables:
+ *  compile-command: "gcc -g -I../../include -o unittest -DUNITTEST progress.c; and ./unittest"
+ *  version-control: t
+ *  indent-tabs-mode: t
+ *  c-file-style: "linux"
+ * End:
+ */