Arav/kwh-cost
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Version was set to 1.2.0. Now m, K, M, G, T units can be specified for wattage. Dropped support for long arguments (--). Functions were reorganised.

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This commit is contained in:
Alexander Andreev 2024-11-04 15:20:26 +04:00
parent ad6cbf62af
commit 8e09177f24
Signed by: Arav
GPG Key ID: 25969B23DCB5CA34
2 changed files with 70 additions and 64 deletions
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2
PKGBUILD
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@ -1,6 +1,6 @@
# Maintainer: Alexander "Arav" Andreev <me@arav.su>
pkgname=kwh-cost
pkgver=1.1.3
pkgver=1.2.0
pkgrel=1
pkgdesc="Calculates cost of electricity."
arch=('i686' 'x86_64' 'arm' 'armv6h' 'armv7h' 'aarch64')

132
kwh-cost.c
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@ -2,66 +2,12 @@
#include <stdlib.h>
#include <string.h>
#define VERSION "1.1.3"
#define VERSION "1.2.0"
typedef long double price_t;
typedef long double wattage_t;
typedef unsigned long interval_t;
int parse_arguments(const int argc, const char *const *const argv,
price_t *const price, wattage_t *const wattage, interval_t *const interval);
interval_t interval_to_seconds(const char *const interval);
price_t price_kwh_to_wattsecond(const price_t price);
void print_version(void);
void print_usage(void);
int main(const int argc, const char *const *const argv) {
price_t price = 0;
wattage_t wattage = 0;
interval_t interval = 0;
switch (parse_arguments(argc, argv, &price, &wattage, &interval)) {
case 1: print_usage(); return 0;
case 2: print_version(); return 0;
case 99: fputs("Unknown flag provided.\n", stderr); print_usage(); return 1;
}
printf("%.2Lf\n", (price * wattage) * interval);
return 0;
}
int parse_arguments(const int argc, const char *const *const argv,
price_t *const price, wattage_t *const wattage, interval_t *const interval) {
if (argc < 2) return 1;
for (int i = 1, pos = 0; i < argc; ++i)
if (argv[i][0] == '-') {
size_t l = strlen(argv[i]);
if (l == 1)
return 99;
if (argv[i][1] == 'h' || (argv[i][1] == '-' && l > 2 && argv[i][2] == 'h'))
return 1;
else if (argv[i][1] == 'v' || (argv[i][1] == '-' && l > 2 && argv[i][2] == 'v'))
return 2;
else
return 99;
} else if (argc < 4) {
return 1;
} else if (pos == 0) {
*price = price_kwh_to_wattsecond((price_t)atof(argv[i]));
++pos;
} else if (pos == 1) {
*wattage = (wattage_t)atof(argv[2]);
++pos;
} else
*interval += interval_to_seconds(argv[i]);
return 0;
}
interval_t interval_to_seconds(const char *const interval) {
interval_t intrvl = (interval_t)atol(interval);
@ -80,28 +26,88 @@ interval_t interval_to_seconds(const char *const interval) {
}
}
wattage_t wattage_to_watts(const char *const wattage) {
wattage_t wattg = (wattage_t)atof(wattage);
switch (wattage[strlen(wattage)-1]) {
case 'm':
return wattg / 1000.;
case 'k':
case 'K':
return wattg * 1000.;
case 'M':
return wattg * 1000000.;
case 'G':
return wattg * 1000000000.;
case 'T':
return wattg * 1000000000000.;
default:
return wattg;
}
}
price_t price_kwh_to_wattsecond(const price_t price) {
return price / 1000.f / 3600.f;
}
int parse_arguments(const int argc, const char *const *const argv,
price_t *const price, wattage_t *const wattage, interval_t *const interval) {
if (argc < 2) return 1;
for (int i = 1, pos = 0; i < argc; ++i)
if (argv[i][0] == '-') {
if (strlen(argv[i]) < 2) return 99;
switch (argv[i][1]) {
case 'h': return 1;
case 'v': return 2;
default: return 99;
}
} else if (argc < 4) {
return 1;
} else if (pos == 0) {
*price = price_kwh_to_wattsecond((price_t)atof(argv[i]));
++pos;
} else if (pos == 1) {
*wattage = wattage_to_watts(argv[2]);
++pos;
} else
*interval += interval_to_seconds(argv[i]);
return 0;
}
void print_version(void) {
fputs("kwh-cost Ver. " VERSION "\n"
"Copyright (C) 2021-2024 Alexander \"Arav\" Andreev <me@arav.su>. All rights reserved.\n"
"This program is distributed under the terms of MIT+NIGGER license.\n"
"You can see a license for this program in /usr/share/licenses/kwh-cost/LICENSE.\n", stderr);
"A license for this program is placed in /usr/share/licenses/kwh-cost/LICENSE.\n", stderr);
}
void print_usage(void) {
fputs("Usage: kwh-cost [OPTIONS] price wattage interval [interval ...]\n"
"Options:\n"
" --help, -h display this usage information.\n"
" --version, -v display program version.\n"
" -h display this usage information.\n"
" -v display program version.\n"
"Arguments:\n"
" price price per kWh.\n"
" wattage power usage in Watts.\n"
" interval time interval in seconds during which\n"
" this much power to be constantly used.\n"
" You may specify other time units such as:\n"
" m'inute, h'our, d'ay. Example: 5d 3h.\n"
" wattage power usage in Watts (m, K, M, G, T).\n"
" interval time interval in seconds (m'inutes, h'ours, d'ays,\n"
" like 5d 3h) during which given power is constantly used.\n"
" All given intervals will be summed up.\n", stderr);
}
int main(const int argc, const char *const *const argv) {
price_t price = 0;
wattage_t wattage = 0;
interval_t interval = 0;
switch (parse_arguments(argc, argv, &price, &wattage, &interval)) {
case 1: print_usage(); return 0;
case 2: print_version(); return 0;
case 99: fputs("Unknown flag provided.\n", stderr); print_usage(); return 1;
}
printf("%.2Lf\n", (price * wattage) * interval);
return 0;
}