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/* dbar - ascii percentage meter
*
* Copyright (C) 2007 by Robert Manea, <rob dot manea at gmail dot com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* Compile with:
* gcc dbar.c -o dbar
*
*/
/*
dbar lets you define static 0% and 100% marks or you can define these
marks dynamically at runtime. Static and dynamic marks can be mixed,
in this case the value specified at runtime will have a higher priority.
You can specify ranges of numbers, negative, positive or ranges with a
negative min value and positive max value.
All numbers are treated as double precision floating point, i.e. the
input is NOT limited to integers.
Options:
-max : Value to be considered 100% (default: 100)
-min : Value to be considered 0% (default: 0 )
-w : Number of charcaters to be
considered 100% in the meter (default: 25 )
-s : Symbol represeting the
percentage value in the meter (default: = )
-l : label to be prepended to
the bar (default: '' )
-nonl: no new line, don't put
'\n' at the end of the bar (default: do print '\n')
Usage examples:
1) Static 100% mark or single value input:
echo 25 | dbar -m 100 -l Sometext
Output: Sometext 25% [====== ]
2) If your 100% mark changes dynamically or 2-values input:
echo "50 150" | dbar
^ ^
| |__ max. value
|
|__ value to display
Output: 33% [======== ]
3) If your value range is not between [0, maxval] or 3-values input:
echo "50 -25 150" | dbar
^ ^ ^
| | |__ max. value 100% mark
| |
| |_____ min. value 0% mark
|
|________ value to display
Output: 43% [=========== ]
4) Multiple runs:
for i in 2 20 50 75 80; do echo $i; sleep 1; done | dbar | dzen2
Output: Find out yourself.
*/
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
#define MAXLEN 512
static void pbar (const char*, double, int, char, int);
static void
pbar(const char* label, double perc, int maxc, char sym, int pnl) {
int i, rp;
double l;
l = perc * ((double)maxc / 100);
if((int)(l + 0.5) >= (int)l)
l = l + 0.5;
if((int)(perc + 0.5) >= (int)perc)
rp = (int)(perc + 0.5);
else
rp = (int)perc;
if(label)
printf("%s %3d%% [", label, rp);
else
printf("%3d%% [", rp);
for(i=0; i < (int)l; i++)
if(i == maxc) {
putchar('>');
break;
} else
putchar(sym);
for(; i < maxc; i++)
putchar(' ');
printf("]%s", pnl ? "\n" : "");
fflush(stdout);
}
int
main(int argc, char *argv[])
{
int i, nv;
double val;
char aval[MAXLEN], *endptr;
/* defaults */
int maxchars = 25;
double minval = 0;
double maxval = 100.0;
char psym = '=';
int print_nl = 1;
const char *label = NULL;
for(i=1; i < argc; i++) {
if(!strncmp(argv[i], "-w", 3)) {
if(++i < argc)
maxchars = atoi(argv[i]);
}
else if(!strncmp(argv[i], "-s", 3)) {
if(++i < argc)
psym = argv[i][0];
}
else if(!strncmp(argv[i], "-max", 5)) {
if(++i < argc) {
maxval = strtod(argv[i], &endptr);
if(*endptr) {
fprintf(stderr, "dbar: '%s' incorrect number format", argv[i]);
return EXIT_FAILURE;
}
}
}
else if(!strncmp(argv[i], "-min", 5)) {
if(++i < argc) {
minval = strtod(argv[i], &endptr);
if(*endptr) {
fprintf(stderr, "dbar: '%s' incorrect number format", argv[i]);
return EXIT_FAILURE;
}
}
}
else if(!strncmp(argv[i], "-l", 3)) {
if(++i < argc)
label = argv[i];
}
else if(!strncmp(argv[i], "-nonl", 6)) {
print_nl = 0;
}
else {
fprintf(stderr, "usage: dbar [-w <characters>] [-s <symbol>] [-min <minvalue>] [-max <maxvalue>] [-l <string>] [-nonl]\n");
return EXIT_FAILURE;
}
}
while(fgets(aval, MAXLEN, stdin)) {
nv = sscanf(aval, "%lf %lf %lf", &val, &minval, &maxval);
if(nv == 2) {
maxval = minval;
minval = 0;
}
pbar(label, (100*(val-minval))/(maxval-minval), maxchars, psym, print_nl);
}
return EXIT_SUCCESS;
}
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