Promote the src/tools crate to the top-level workspace.

The 'src' and 'tests' top-level directories now contain tools sources
and integration tests for any of the library crates.

cranelift/src/cat.rs

@@ -0,0 +1,66 @@
+//! The `cat` sub-command.
+//!
+//! Read a sequence of Cretonne IL files and print them again to stdout. This has the effect of
+//! normalizing formatting and removing comments.
+
+use std::borrow::Cow;
+use cretonne::ir::Function;
+use cton_reader::{parse_functions, TestCommand};
+use CommandResult;
+use utils::read_to_string;
+use filetest::subtest::{self, SubTest, Context, Result as STResult};
+
+pub fn run(files: Vec<String>) -> CommandResult {
+    for (i, f) in files.into_iter().enumerate() {
+        if i != 0 {
+            println!("");
+        }
+        try!(cat_one(f))
+    }
+    Ok(())
+}
+
+fn cat_one(filename: String) -> CommandResult {
+    let buffer = try!(read_to_string(&filename).map_err(|e| format!("{}: {}", filename, e)));
+    let items = try!(parse_functions(&buffer).map_err(|e| format!("{}: {}", filename, e)));
+
+    for (idx, func) in items.into_iter().enumerate() {
+        if idx != 0 {
+            println!("");
+        }
+        print!("{}", func);
+    }
+
+    Ok(())
+}
+
+/// Object implementing the `test cat` sub-test.
+///
+/// This command is used for testing the parser and function printer. It simply parses a function
+/// and prints it out again.
+///
+/// The result is verified by filecheck.
+struct TestCat;
+
+pub fn subtest(parsed: &TestCommand) -> STResult<Box<SubTest>> {
+    assert_eq!(parsed.command, "cat");
+    if !parsed.options.is_empty() {
+        Err(format!("No options allowed on {}", parsed))
+    } else {
+        Ok(Box::new(TestCat))
+    }
+}
+
+impl SubTest for TestCat {
+    fn name(&self) -> Cow<str> {
+        Cow::from("cat")
+    }
+
+    fn needs_verifier(&self) -> bool {
+        false
+    }
+
+    fn run(&self, func: Cow<Function>, context: &Context) -> STResult<()> {
+        subtest::run_filecheck(&func.to_string(), context)
+    }
+}