wasm: Fix memcpy, memset

1 files changed, 21 insertions, 6 deletions

diff --git a/reduced_system_layer.c b/reduced_system_layer.c
index 7cbfd93..b7b0d5a 100755
--- a/reduced_system_layer.c
+++ b/reduced_system_layer.c
@@ -226,10 +226,11 @@ i32  p_handle_events(void);
 i32  p_wait_events(void);
 void p_render_frame(void);
 
-//  User-defined proc
+//  User-defined frame updating procedure
+//  NOTE This procedure is required for the WebAssembly compatibility.
 void update_and_render_frame(void);
 
-//  Convenient helper for the event loop
+//  Convenient helper procedure for the event loop
 void p_event_loop(void);
 
 //  Clipboard
@@ -267,14 +268,12 @@ f64 ceil(f64 x);
 
 //  ================================================================
 //
-//    WRITE YOUR CODE HERE
+//    EXAMPLE CODE
 //
 //  ================================================================
 
 #ifdef REDUCED_SYSTEM_LAYER_EXAMPLE
 
-//  NOTE
-//  This procedure is required for the WebAssembly compatibility.
 void update_and_render_frame(void) {
   p_handle_events();
 
@@ -325,8 +324,10 @@ Platform platform = {0};
 
 void p_event_loop(void) {
   p_init();
+#if !defined(__wasm__)
   while (!platform.done) update_and_render_frame();
   p_cleanup();
+#endif
 }
 
 //  ================================================================
@@ -1250,6 +1251,18 @@ void p_render_frame(void) {
   p_render_frame_impl();
 }
 
+__attribute__((export_name("js_memset"))) void js_memset(void *dst, i32 val, u32 num) {
+  if (dst == NULL) return;
+  for (u32 i = 0; i < num; ++i)
+    ((u8 *) dst)[i] = (u8) val;
+}
+
+__attribute__((export_name("js_memcpy"))) void js_memcpy(void *dst, void const *src, u32 num) {
+  if (dst == NULL || src == NULL) return;
+  for (u32 i = 0; i < num; ++i)
+    ((u8 *) dst)[i] = ((u8 const *) src)[i];
+}
+
 __attribute__((export_name("js_main"))) void js_main(c8 *href) {
   main(1, &href);
 }
@@ -1259,7 +1272,7 @@ __attribute__((export_name("js_init"))) void js_init(void) {
   platform.done   = 1;
 }
 
-__attribute__((export_name("js_title"))) c8 *js_title(void) {
+__attribute__((export_name("js_title"))) void *js_title(void) {
   return platform.title;
 }
 
@@ -1274,6 +1287,8 @@ __attribute__((export_name("js_frame"))) void js_frame(i32 frame_width, i32 fram
     platform.frame_height = frame_height;
   }
 
+  platform.done = 0;
+
   update_and_render_frame();
 }