various samples and experiments

samples/static_contract.rs

@@ -1,33 +1,8 @@
-#![feature(link_args)]
-#![no_main]
-
-// as it is experimental preamble
-#![allow(dead_code)]
-
-#[link_args = "-s WASM=1 -s NO_EXIT_RUNTIME=1 -s NO_FILESYSTEM=1"]
-extern {}
-
-static DATA: u32 = 0;
-
-#[no_mangle]
-pub fn call(_descr: *mut u8) {
-    let data_ptr = &DATA as *const u32 as *mut u32;
-    unsafe { *data_ptr += 1; }
+extern {
+  #[link(name="env")]
+  fn log_event(id: *const u8);
 }
 
-/* This produces the following code (after injecting gas counter & optimizing)
-(module
-  (type (;0;) (func (param i32)))
-  (type (;1;) (func (param i32)))
-  (import "env" "memory" (memory (;0;) 256 256))
-  (import "env" "table" (table (;0;) 0 0 anyfunc))
-  (import "env" "gas" (func (;0;) (type 1)))
-  (func (;1;) (type 0) (param i32)
-    i32.const 4
-    call 0
-    i32.const 1268
-    i32.const 1
-    i32.store)
-  (export "_call" (func 1))
-  (data (i32.const 1212) " \05"))
-*/
+fn main() {
+    unsafe { log_event(::std::ptr::null()); }
+}