Implement Wasmer::XxxArray#each

src/lib.rs

@@ -104,6 +104,9 @@ pub extern "C" fn Init_wasmer() {
 
  // Declare the `[]` (get) method.
  itself.def("[]", memory::view::$mod_name::ruby_memory_view_get);
+
+ // Declare the `each` method.
+ itself.def("each", memory::view::$mod_name::ruby_memory_view_each);
  });
  };
  }

src/memory/view.rs

@@ -9,7 +9,7 @@ macro_rules! memory_view {
  use lazy_static::lazy_static;
  use rutie::{
  class, methods, wrappable_struct, AnyException, Exception, Fixnum, Integer,
- NilClass, Object,
+ NilClass, Object, VM,
  };
  use std::{mem::size_of, rc::Rc};
  use wasmer_runtime as runtime;
@@ -71,6 +71,17 @@ macro_rules! memory_view {
  Ok(view[offset + index].get())
  }
  }
+
+ pub fn each(&self) {
+ let view = self.memory.view::<$wasm_type>();
+
+ let mut offset = self.offset;
+ while offset < view.len() {
+ let value = view[offset].get();
+ VM::yield_object(Integer::from(value as i64));
+ offset += 1;
+ }
+ }
  }
 
  wrappable_struct!(MemoryView, MemoryViewWrapper, MEMORY_VIEW_WRAPPER);
@@ -117,6 +128,12 @@ macro_rules! memory_view {
  ))
  })
  }
+
+ fn ruby_memory_view_each() -> RubyMemoryView {
+ let memory_view = _itself.get_data(&*MEMORY_VIEW_WRAPPER);
+ memory_view.each();
+ _itself
+ }
  );
  }
  };

tests/memory_test.rb

@@ -99,17 +99,13 @@ def test_hello_world
  nth = 0
  string = ""
 
- while true
- char = memory[nth]
-
- if 0 == char
- break
- end
-
- string += char.chr
+ memory.each do |char|
+ break if 0 == char
+ string << char.chr
  nth += 1
  end
 
+ assert_equal 13, nth
  assert_equal "Hello, World!", string
  end