Initial reorg.

This is largely the same as #305, but updated for the current tree.

crates/wasi-common/wasi-common-cbindgen/tests/array_args.rs

@@ -0,0 +1,20 @@
+extern crate wasi_common_cbindgen;
+
+pub use wasi_common_cbindgen::wasi_common_cbindgen;
+
+#[wasi_common_cbindgen]
+fn array_args(a: &mut [u8]) {
+    a[0] = 1;
+}
+
+fn main() {
+    let mut expected: &mut [u8] = &mut [0, 0];
+    array_args(&mut expected);
+
+    let given: &mut [u8] = &mut [0, 0];
+    unsafe {
+        wasi_common_array_args(given.as_mut_ptr(), given.len());
+    }
+
+    assert_eq!(given, expected);
+}

crates/wasi-common/wasi-common-cbindgen/tests/mut_args.rs

@@ -0,0 +1,20 @@
+extern crate wasi_common_cbindgen;
+
+pub use wasi_common_cbindgen::wasi_common_cbindgen;
+
+#[wasi_common_cbindgen]
+fn mut_args(a: &mut usize) {
+    *a = *a + 1
+}
+
+fn main() {
+    let mut expected = Box::new(2);
+    mut_args(expected.as_mut());
+    let given = unsafe {
+        let given = Box::new(2);
+        let raw = Box::into_raw(given);
+        wasi_common_mut_args(raw);
+        Box::from_raw(raw)
+    };
+    assert_eq!(*given, *expected);
+}

crates/wasi-common/wasi-common-cbindgen/tests/no_args.rs

@@ -0,0 +1,12 @@
+extern crate wasi_common_cbindgen;
+
+pub use wasi_common_cbindgen::wasi_common_cbindgen;
+
+#[wasi_common_cbindgen]
+fn no_args() -> u32 {
+    0
+}
+
+fn main() {
+    assert_eq!(unsafe { wasi_common_no_args() }, no_args());
+}

crates/wasi-common/wasi-common-cbindgen/tests/ref_args.rs

@@ -0,0 +1,20 @@
+extern crate wasi_common_cbindgen;
+
+pub use wasi_common_cbindgen::wasi_common_cbindgen;
+
+#[wasi_common_cbindgen]
+fn ref_args(a: &usize) -> usize {
+    a + 1
+}
+
+fn main() {
+    let a = Box::new(2);
+    let expected = ref_args(a.as_ref());
+    let given = unsafe {
+        let raw = Box::into_raw(a);
+        let res = wasi_common_ref_args(raw);
+        Box::from_raw(raw);
+        res
+    };
+    assert_eq!(given, expected);
+}

crates/wasi-common/wasi-common-cbindgen/tests/test.rs

@@ -0,0 +1,9 @@
+#[test]
+fn tests() {
+    let t = trybuild::TestCases::new();
+    t.pass("tests/no_args.rs");
+    t.pass("tests/val_args.rs");
+    t.pass("tests/ref_args.rs");
+    t.pass("tests/mut_args.rs");
+    t.pass("tests/array_args.rs");
+}

crates/wasi-common/wasi-common-cbindgen/tests/val_args.rs

@@ -0,0 +1,12 @@
+extern crate wasi_common_cbindgen;
+
+pub use wasi_common_cbindgen::wasi_common_cbindgen;
+
+#[wasi_common_cbindgen]
+fn val_args(a: usize, b: usize) -> usize {
+    a + b
+}
+
+fn main() {
+    assert_eq!(unsafe { wasi_common_val_args(1, 2) }, val_args(1, 2));
+}