Adding fuzzers for unsafe code.

fuzz/Cargo.toml

@@ -0,0 +1,31 @@
+[package]
+name = "shlex-fuzz"
+version = "0.0.0"
+authors = ["Automatically generated"]
+publish = false
+edition = "2018"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.shlex]
+path = ".."
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[[bin]]
+name = "fuzz_next"
+path = "fuzz_targets/fuzz_next.rs"
+test = false
+doc = false
+
+[[bin]]
+name = "fuzz_quote"
+path = "fuzz_targets/fuzz_quote.rs"
+test = false
+doc = false

fuzz/fuzz_targets/fuzz_next.rs

@@ -0,0 +1,10 @@
+#![no_main]
+#[macro_use] extern crate libfuzzer_sys;
+use shlex::Shlex;
+
+fuzz_target!(|data: &[u8]| {
+    if let Ok(s) = std::str::from_utf8(data) {
+        let mut sh = Shlex::new(s);
+        while let Some(word) = sh.next() {}
+    }
+});

fuzz/fuzz_targets/fuzz_quote.rs

@@ -0,0 +1,9 @@
+#![no_main]
+#[macro_use] extern crate libfuzzer_sys;
+use shlex::quote;
+
+fuzz_target!(|data: &[u8]| {
+    if let Ok(s) = std::str::from_utf8(data) {
+        quote(s);
+    }
+});