ulib Time utilities, expose time() syscall

ulib/Makefile

@@ -16,6 +16,7 @@ SRCFILES := $(call GRABSRC, \
 							ubsan \
 							umalloc \
 							fs \
+							time \
 						)
 
 CFLAGS += -isystem $(ROOT)/share -isystem $(ROOT)/ulib -isystem $(ROOT)/std/include \

ulib/system/system.c

@@ -138,3 +138,7 @@ int32_t dev_stat(DevStat *devstatbuf, size_t idx) {
 int32_t dev_cmd(Dev_t *dev, uint64_t cmd, void *buf, size_t len, void *extra) {
   return syscall(SYS_DEV_CMD, (uint64_t)dev, (uint64_t)cmd, (uint64_t)buf, (uint64_t)len, (uint64_t)extra, 0);
 }
+
+int32_t time(Time *time) {
+  return syscall(SYS_TIME, (uint64_t)time, 0, 0, 0, 0, 0);
+}

ulib/system/system.h

@@ -7,6 +7,7 @@
 #include <sysdefs/dev.h>
 #include <sysdefs/proc.h>
 #include <sysdefs/fs.h>
+#include <sysdefs/time.h>
 
 void debugprint(const char *string);
 int32_t mman_map(uint8_t *addr, size_t size, uint64_t prot, uint64_t flags, uint8_t **out);
@@ -41,5 +42,6 @@ int32_t dev_gethandle(Dev_t *dev, char *name);
 int32_t dev_listsize(void);
 int32_t dev_stat(DevStat *devstatbuf, size_t idx);
 int32_t dev_cmd(Dev_t *dev, uint64_t cmd, void *buf, size_t len, void *extra);
+int32_t time(Time *time);
 
 #endif // ULIB_SYSTEM_SYSTEM_H_

ulib/time/time.c

@@ -0,0 +1,31 @@
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <sysdefs/time.h>
+
+bool time_isleap(uint32_t y) {
+  return ((y % 4 == 0) && (y % 100 != 0) || (y % 400 == 0));
+}
+
+const uint16_t days_before_month[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
+
+timeunix_t time_tounix(Time *time) {
+  uint64_t days = 0;
+  for (uint32_t y = 1970; y < time->year; y++) {
+    days += time_isleap(y) ? 366 : 365;
+  }
+
+  days += days_before_month[time->month - 1];
+
+  if (time->month > 2 && time_isleap(time->year)) {
+    days += 1;
+  }
+
+  days += time->day - 1;
+
+  uint64_t secs = days * 86400;
+  secs += time->hour * 3600;
+  secs += time->minute * 60;
+  secs += time->second;
+  return secs;
+}

ulib/time/time.h

@@ -0,0 +1,8 @@
+#ifndef ULIB_TIME_TIME_H_
+#define ULIB_TIME_TIME_H_
+
+#include <sysdefs/time.h>
+
+timeunix_t time_tounix(Time *time);
+
+#endif // ULIB_TIME_TIME_H_

ulib/ulib.h

@@ -11,12 +11,13 @@
 #include <syscall/syscall.h>
 #include <system/system.h>
 #include <util/util.h>
+#include <umalloc/umalloc.h>
+#include <fs/path.h>
+#include <time/time.h>
 #include <uprintf.h>
 #include <linklist.h>
 #include <log.h>
 #include <assert.h>
-#include <umalloc/umalloc.h>
-#include <fs/path.h>
 #include <dlinklist.h>
 
 #include <errors.h>
@@ -25,6 +26,7 @@
 #include <sysdefs/mman.h>
 #include <sysdefs/proc.h>
 #include <sysdefs/sched.h>
+#include <sysdefs/time.h>
 #include <sysdefs/syscall.h>
 
 #endif // ULIB_ULIB_H_