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LibC: Implement ctime() and asctime()

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Bananymous 2024-07-31 23:25:35 +03:00
parent 5fca5c774a
commit 10ce03a1e7
1 changed files with 26 additions and 0 deletions
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26
userspace/libraries/LibC/time.cpp
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@ -5,11 +5,37 @@
#include <time.h> #include <time.h>
#include <unistd.h> #include <unistd.h>
// sample implementation from https://pubs.opengroup.org/onlinepubs/9699919799/functions/asctime.html
char* asctime(const struct tm* timeptr)
{
static constexpr char wday_name[][4] {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};
static constexpr char mon_name[][4] {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
static char result[128];
sprintf(result, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
wday_name[timeptr->tm_wday],
mon_name[timeptr->tm_mon],
timeptr->tm_mday, timeptr->tm_hour,
timeptr->tm_min, timeptr->tm_sec,
1900 + timeptr->tm_year);
return result;
}
int clock_gettime(clockid_t clock_id, struct timespec* tp) int clock_gettime(clockid_t clock_id, struct timespec* tp)
{ {
return syscall(SYS_CLOCK_GETTIME, clock_id, tp); return syscall(SYS_CLOCK_GETTIME, clock_id, tp);
} }
char* ctime(const time_t* clock)
{
return asctime(localtime(clock));
}
int nanosleep(const struct timespec* rqtp, struct timespec* rmtp) int nanosleep(const struct timespec* rqtp, struct timespec* rmtp)
{ {
return syscall(SYS_NANOSLEEP, rqtp, rmtp); return syscall(SYS_NANOSLEEP, rqtp, rmtp);