libdelimit, Makefile: adds test for libdelimit, changes API; fop(1): changes to new libdelimit API

Makefile

@@ -71,12 +71,16 @@ TESTS != printf '%s\n' "$(TESTFILES)" | xargs -n1 basename \
 include $(TESTFILES)
 
 .PHONY: test
-test: all $(TESTS) /tmp/getopt
+test: all $(TESTS) /tmp/delimit /tmp/getopt
 	@echo $(TESTS)
+	/tmp/delimit
 	/tmp/getopt
 
+/tmp/delimit: src/libdelimit.rs
+	$(RUSTC) --test -o $@ src/libdelimit.rs
+
 /tmp/getopt: src/libgetopt.rs
-	$(RUSTC) --test -o /tmp/getopt src/libgetopt.rs
+	$(RUSTC) --test -o $@ src/libgetopt.rs
 
 .PHONY: docs
 docs: docs/ build

src/fop.rs

@@ -92,7 +92,7 @@ fn main() -> ExitCode {
 		exit(usage(&argv[0]).into());
 	});
 
-	let stdin = Box::new(stdin().lock());
+	let stdin = stdin().lock();
 
 	let mut input = Delimited::new(stdin, d.clone().as_bytes());
 	let mut n = 0;

src/libdelimit.rs

@@ -23,14 +23,14 @@ use std::{
 
 const BUFFER_SIZE: usize = 4096;
 
-pub struct Delimited {
-    stream: Box<dyn Read>,
+pub struct Delimited<T: Read> {
     delimiter: Vec<u8>,
-    buffer: Vec<u8>
+    buffer: Vec<u8>,
+    stream: T,
 }
 
-impl Delimited {
-	pub fn new(stream: Box<dyn Read>, delimiter: &[u8]) -> Self {
+impl<T> Delimited<T> where T: Read {
+	pub fn new(stream: T, delimiter: &[u8]) -> Self {
         Delimited {
             stream,
             delimiter: delimiter.to_vec(),
@@ -39,7 +39,7 @@ impl Delimited {
     }
 }
 
-impl Iterator for Delimited {
+impl<T> Iterator for Delimited<T> where T: Read {
     type Item = Result<Vec<u8>>;
 
     fn next(&mut self) -> Option<Self::Item> {
@@ -89,3 +89,23 @@ fn find_subslice(stack: &[u8], key: &[u8]) -> Option<usize> {
 
     None
 }
+
+#[cfg(test)]
+mod tests {
+	use Delimited;
+
+	#[test]
+	fn testing() {
+		let d = '\u{1E}'.to_string();
+		let input = vec!["meow", "woof", "ribbit"];
+		let r = input.join(&d);
+
+		let mut output = Delimited::new(r.as_bytes(), d.as_bytes());
+
+		let mut i = 0;
+		while let Some(item) = output.next() {
+			assert_eq!(input[i].as_bytes(), item.unwrap());
+			i += 1;
+		}
+	}
+}