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kwh-cost
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2 Commits
3d52d708bc ... 8556f85781

Author SHA1 Message Date
Alexander Andreev 8556f85781
[main.{c,h}] Let's put some safety into this code! xD 2022-01-06 04:23:20 +04:00
Alexander Andreev 1ef712c6a5
[Makefile] Added a simple test that verifies output. Mostly as an example of use for test command. 2022-01-06 04:21:08 +04:00
3 changed files with 12 additions and 8 deletions
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6
Makefile
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@ -23,4 +23,8 @@ install:
uninstall: uninstall:
rm -f ${DESTDIR}usr/bin/${TARGET} rm -f ${DESTDIR}usr/bin/${TARGET}
rm -f ${DESTDIR}usr/share/licenses/${TARGET}/LICENSE rm -f ${DESTDIR}usr/share/licenses/${TARGET}/LICENSE
test:
@echo -n "Does input \"3.68 120 30d\" gives 317.95? "
@test "${shell ./kwh-cost 3.68 120 30d}" = "317.95" && { echo -e "\e[32mYES\e[0m"; } || { echo -e "\e[31mNO\e[0m"; }

8
src/main.c
View File

@ -4,7 +4,7 @@
#include "main.h" #include "main.h"
int main(int argc, char **argv) { int main(int const argc, const char * const * const argv) {
price_t price; price_t price;
wattage_t wattage; wattage_t wattage;
interval_t interval = 0; interval_t interval = 0;
@ -23,7 +23,7 @@ int main(int argc, char **argv) {
return 0; return 0;
} }
int parse_arguments(int argc, char **argv, price_t *price, wattage_t *wattage, interval_t *interval) { 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; if (argc < 2) return 1;
for (int i = 1, pos = 0; i < argc; ++i) for (int i = 1, pos = 0; i < argc; ++i)
@ -46,7 +46,7 @@ int parse_arguments(int argc, char **argv, price_t *price, wattage_t *wattage, i
return 0; return 0;
} }
inline interval_t interval_to_seconds(char *interval) { inline interval_t interval_to_seconds(const char * const interval) {
interval_t intrvl = (interval_t)atol(interval); interval_t intrvl = (interval_t)atol(interval);
switch (interval[strlen(interval) - 1]) { switch (interval[strlen(interval) - 1]) {
@ -64,7 +64,7 @@ inline interval_t interval_to_seconds(char *interval) {
} }
} }
inline price_t to_wattspersecond(price_t price) { inline price_t to_wattspersecond(const price_t price) {
return price / 1000.f / 3600.f; return price / 1000.f / 3600.f;
} }

6
src/main.h
View File

@ -7,10 +7,10 @@ typedef long double price_t;
typedef long double wattage_t; typedef long double wattage_t;
typedef unsigned long interval_t; typedef unsigned long interval_t;
int parse_arguments(int argc, char **argv, price_t *price, wattage_t *wattage, interval_t *interval); int parse_arguments(const int argc, const char *const *const argv, price_t *const price, wattage_t *const wattage, interval_t *const interval);
inline interval_t interval_to_seconds(char *interval); inline interval_t interval_to_seconds(const char * const interval);
inline price_t to_wattspersecond(price_t price); inline price_t to_wattspersecond(const price_t price);
inline void print_version(); inline void print_version();
inline void print_usage(); inline void print_usage();