add second time example.

1 files changed, 47 insertions, 0 deletions

diff --git a/time_example2.c b/time_example2.c
new file mode 100644
index 0000000..032b922
--- /dev/null
+++ b/time_example2.c
@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <time.h>
+
+void dump_time_struct_bytes(struct tm *time_ptr, int size)
+{
+  int i;
+  unsigned char *raw_ptr;
+  printf("bytes of struct located at 0x%p\n", time_ptr);
+  raw_ptr = (unsigned char *) time_ptr;
+  for (i = 0; i < size; i++) {
+    printf("%02x ", raw_ptr[i]);
+    if (i % 16 == 15)
+      printf("\n");
+  }
+  printf("\n");
+}
+
+int main(int argc, const char *argv[])
+{
+  long int seconds_since_epoch;
+  struct tm current_time, *time_ptr;
+  int hour, minute, second, i, *int_ptr;
+
+  seconds_since_epoch = time(0);
+  printf("time() - seconds since epoch: %ld\n", seconds_since_epoch);
+
+  time_ptr = &current_time;
+  localtime_r(&seconds_since_epoch, time_ptr);
+
+  hour = current_time.tm_hour;
+  minute = time_ptr->tm_min;
+  second = *((int *) time_ptr);
+
+  printf("Current time is: %02d:%02d:%02d\n", hour, minute, second);
+
+  dump_time_struct_bytes(time_ptr, sizeof(struct tm));
+
+  minute = hour = 0;
+  int_ptr = (int *) time_ptr;
+
+  for (i = 0; i < 3; i++) {
+    printf("int_ptr @ 0x%p : %d\n", int_ptr, *int_ptr);
+    int_ptr++;
+  }
+
+  return 0;
+}