add time, iff!

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rust_util"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["Hatter Jiang <jht5945@gmail.com>"]
 edition = "2018"
 description = "Hatter's Rust Util"

src/lib.rs

@@ -13,6 +13,15 @@ pub mod util_cmd;
 pub mod util_msg;
 pub mod util_size;
 pub mod util_file;
+pub mod util_time;
+
+/// iff!(condition, result_when_true, result_when_false)
+#[macro_export]
+macro_rules! iff {
+    ($c:expr, $t:expr, $f:expr) => {
+        if $c { $t } else { $f }
+    };
+}
 
 pub type XResult<T> = Result<T, Box<dyn std::error::Error>>;
 

src/util_time.rs

@@ -0,0 +1,9 @@
+use std::time::SystemTime;
+
+pub fn get_current_secs() -> u64 {
+    SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs()
+}
+
+pub fn get_current_millis() -> u128 {
+    SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_millis()
+}