Prepare bin/cue writer

src/Tools/tool_helper/src/lib.rs

@@ -1,4 +1,4 @@
-use std::{boxed::Box, io::{Read, Write}, path::PathBuf};
+use std::{boxed::Box, io::{BufReader, BufWriter, Read, Write}, path::PathBuf};
 
 pub mod bits;
 pub mod raw;
@@ -80,17 +80,27 @@ impl std::convert::From<cdtypes::Error> for Error {
     }
 }
 
+impl std::convert::From<std::convert::Infallible> for Error {
+    fn from(error: std::convert::Infallible) -> Self {
+        Error::from_error(error)
+    }
+}
+
+pub fn open_output_file(output_path: PathBuf) -> Result<BufWriter<std::fs::File>, Error> {
+    Ok(std::io::BufWriter::new(std::fs::File::create(output_path)?))
+}
+
 pub fn open_output(output_file: Option<PathBuf>) -> Result<Output, Error> {
     match output_file {
-        Some(output_path) => Ok(Box::new(std::io::BufWriter::new(std::fs::File::create(output_path)?))),
-        None              => Ok(Box::new(std::io::BufWriter::new(std::io::stdout()))),
+        Some(output_path) => Ok(Box::new(open_output_file(output_path)?)),
+        None              => Ok(Box::new(BufWriter::new(std::io::stdout()))),
     }
 }
 
 pub fn open_input(input_file: Option<PathBuf>) -> Result<Input, Error> {
     match input_file {
-        Some(input_path) => Ok(Box::new(std::io::BufReader::new(std::fs::File::open(input_path)?))),
-        None             => Ok(Box::new(std::io::BufReader::new(std::io::stdin()))),
+        Some(input_path) => Ok(Box::new(BufReader::new(std::fs::File::open(input_path)?))),
+        None             => Ok(Box::new(BufReader::new(std::io::stdin()))),
     }
 }