[dev] use generic type (that implements Write trait) for print functions

also simplify `stdin.lock()` and `stdout.lock()`

src/main.rs

@@ -8,7 +8,6 @@ use std::{
         Error as IoError,
         ErrorKind,
         Read,
-        StdoutLock,
         Write,
     },
 };
@@ -28,7 +27,10 @@ where
 }
 
 #[inline(always)]
-fn print_time_color(output: &mut StdoutLock) -> Result<(), std::io::Error> {
+fn print_time_color<T>(output: &mut T) -> Result<(), std::io::Error>
+where
+    T: Write,
+{
     let date_now = Local::now().format(TIME_FORMAT);
 
     let color_green = "\x1b\x5b\x30\x3b\x33\x32\x6d";
@@ -38,7 +40,10 @@ fn print_time_color(output: &mut StdoutLock) -> Result<(), std::io::Error> {
 }
 
 #[inline(always)]
-fn print_delete_line(output: &mut StdoutLock) -> LogtimesResult {
+fn print_delete_line<T>(output: &mut T) -> LogtimesResult
+where
+    T: Write,
+{
     // tput dl1 und tput hpa 0
     let bytes = "\x1b\x5b\x4d\x1b\x5b\x31\x47";
     write!(output, "{}", bytes)
@@ -53,11 +58,8 @@ fn run() -> LogtimesResult {
             .expect("Could not open log file")
     });
 
-    let out = stdout();
-    let mut output = out.lock();
-
-    let inp = stdin();
-    let mut input = inp.lock();
+    let mut out = stdout().lock();
+    let mut inp = stdin().lock();
 
     let mut buf = [0; 1];
 
@@ -65,7 +67,7 @@ fn run() -> LogtimesResult {
 
     loop {
         // read 1 char
-        if let Err(e) = input.read_exact(&mut buf) {
+        if let Err(e) = inp.read_exact(&mut buf) {
             if e.kind() == ErrorKind::UnexpectedEof {
                 return Ok(());
             } else {
@@ -80,10 +82,10 @@ fn run() -> LogtimesResult {
         //     [timestamp] actual content\n
         //  also write the line to the log file if there is one
         if buf[0] == 0xa {
-            print_delete_line(&mut output)?;
-            print_time_color(&mut output)?;
-            output.write_all(&linebuf)?;
-            output.flush()?;
+            print_delete_line(&mut out)?;
+            print_time_color(&mut out)?;
+            out.write_all(&linebuf)?;
+            out.flush()?;
 
             if let Some(ref mut f) = log_file {
                 print_time(f)?;
@@ -96,8 +98,8 @@ fn run() -> LogtimesResult {
             continue;
         }
 
-        output.write_all(&buf)?;
-        output.flush()?;
+        out.write_all(&buf)?;
+        out.flush()?;
     }
 }