Manage Float and Double FFI types in structs

Author: aarroyoc

src/ffi.rs

@@ -436,6 +436,18 @@ impl ForeignFunctionTable {
                     }
                     libffi::raw::FFI_TYPE_SINT64 => read_and_push_int!(i64),
                     libffi::raw::FFI_TYPE_POINTER => read_and_push_int!(i64),
+		    libffi::raw::FFI_TYPE_FLOAT => {
+			field_ptr = field_ptr.add(field_ptr.align_offset(std::mem::align_of::<f32>()));
+			let n = std::ptr::read(field_ptr as *mut f32);
+			returns.push(Value::Float(f32::from(n).into()));
+			field_ptr = field_ptr.add(std::mem::size_of::<f32>());
+		    }
+		    libffi::raw::FFI_TYPE_DOUBLE => {
+			field_ptr = field_ptr.add(field_ptr.align_offset(std::mem::align_of::<f64>()));
+			let n = std::ptr::read(field_ptr as *mut f64);
+			returns.push(Value::Float(f64::from(n)));
+			field_ptr = field_ptr.add(std::mem::size_of::<f64>());
+		    }
                     libffi::raw::FFI_TYPE_STRUCT => {
                         let substruct = struct_type.atom_fields[i].as_str();
                         let struct_type = self