Merge pull request #53 from ewasm/debug

Properly expose the debug API

src/debug.rs

@@ -1,10 +1,37 @@
-/// The native debug interface exposed to the ewasm contract. These functions are for testing
-/// purposes only. On a live VM, any bytecode trying to import these symbols will be rejected.
-extern "C" {
-    pub fn debug_print32(value: u32);
-    pub fn debug_print64(value: u64);
-    pub fn debug_printMem(offset: *const u32, len: u32);
-    pub fn debug_printMemHex(offset: *const u32, len: u32);
-    pub fn debug_printStorage(pathOffset: *const u32);
-    pub fn debug_printStorageHex(pathOffset: *const u32);
+//! The native debug interface exposed to the ewasm contract. These functions are for testing
+//! purposes only. On a live VM, any bytecode trying to import these symbols will be rejected.
+
+mod native {
+    extern "C" {
+        pub fn debug_print32(value: u32);
+        pub fn debug_print64(value: u64);
+        pub fn debug_printMem(offset: *const u32, len: u32);
+        pub fn debug_printMemHex(offset: *const u32, len: u32);
+        pub fn debug_printStorage(pathOffset: *const u32);
+        pub fn debug_printStorageHex(pathOffset: *const u32);
+    }
+}
+
+pub fn print32(value: u32) {
+    unsafe { native::debug_print32(value) }
+}
+
+pub fn print64(value: u32) {
+    unsafe { native::debug_print64(value) }
+}
+
+pub fn printMem(slice: &[u8]) {
+    unsafe { native::debug_printMem(slice.bytes.as_ptr() as *const u32, slice.len()) }
+}
+
+pub fn printMemHex(slice: &[u8]) {
+    unsafe { native::debug_printMem(slice.bytes.as_ptr() as *const u32, slice.len()) }
+}
+
+pub fn printStorage(key: &StorageKey) {
+    unsafe { native::debug_printStorage(key.bytes.as_ptr() as *const u32) }
+}
+
+pub fn printStorageHex(key: &StorageKey) {
+    unsafe { native::debug_printStorageHex(key.bytes.as_ptr() as *const u32) }
 }