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/*
* BSD Zero Clause License
*
* Copyright (c) 2022 Thomas Voss
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted.
*
* 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.
*/
#define _POSIX_C_SOURCE 2
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <lux.h>
#define die(...) err(EXIT_FAILURE, __VA_ARGS__);
#define diex(...) errx(EXIT_FAILURE, __VA_ARGS__);
static int parseint(char *);
static double parsedouble(char *);
static void usage(char *);
int
main(int argc, char **argv)
{
int br, max, opt;
double pr;
lux_t disp;
luxinit(&disp);
if (argc == 1)
goto Gflag;
else while ((opt = getopt(argc, argv, ":d:D:gGi:I:s:S:")) != -1) {
switch (opt) {
case 'g':
if ((br = luxget(&disp)) == -1)
die("luxget");
printf("%d\n", br);
break;
case 'G':
Gflag:
if ((pr = luxgetp(&disp)) == -1)
die("luxgetp");
printf("%f\n", pr);
break;
case 'd':
case 'i':
case 's':
br = parseint(optarg);
if (opt == 'd')
br = -br;
if (opt != 's') {
int tmp = luxget(&disp);
if (tmp == -1)
die("luxget");
br += luxget(&disp);
}
if (br > (max = luxmax(&disp)))
br = max;
else if (br < 0)
br = 0;
if (luxset(&disp, br) == -1)
die("luxset");
break;
case 'D':
case 'I':
case 'S':
pr = parsedouble(optarg);
if (opt == 'D')
pr = -pr;
if (opt != 'S') {
double tmp = luxgetp(&disp);
if (tmp == -1)
die("luxgetp");
pr += luxgetp(&disp);
}
if (pr > 100)
pr = 100;
else if (pr < 0)
pr = 0;
if (luxsetp(&disp, pr) == -1)
die("luxset");
break;
default:
usage(argv[0]);
}
}
luxfree(&disp);
return EXIT_SUCCESS;
}
int
parseint(char *s)
{
char *endptr;
long n = strtol(optarg, &endptr, 0);
if (*s != '\0' && *endptr == '\0')
return (int) n;
diex("parseint: invalid integer '%s'", s);
}
double
parsedouble(char *s)
{
char *endptr;
double n = strtod(optarg, &endptr);
if (*s != '\0' && *endptr == '\0')
return n;
diex("parsedouble: invalid double '%s'", s);
}
void
usage(char *s)
{
fprintf(stderr, "Usage: %s [-gG | -dDiIsS val]\n", s);
exit(EXIT_FAILURE);
}
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