add support for load from url

Cargo.lock

@@ -1543,6 +1543,7 @@ dependencies = [
  "pico-args",
  "uw8-tool",
  "wasmtime",
+ "wat",
 ]
 
 [[package]]

Cargo.toml

@@ -12,4 +12,5 @@ minifb = "0.19"
 notify = "4"
 pico-args = "0.4"
 curlywas = { git = "https://github.com/exoticorn/curlywas.git", rev = "196719b" }
+wat = "1"
 uw8-tool = { path = "uw8-tool" }

examples/wat/xorscroll.wat

@@ -0,0 +1,26 @@
+(module
+  (import "env" "memory" (memory 4))
+  (func (export "upd")
+    (local $i i32) ;; local variables are zero initialized
+
+    (loop $pixels
+      local.get $i ;; pixel index to write to
+
+      (i32.rem_u (local.get $i) (i32.const 320)) ;; x
+      (i32.div_u (i32.load (i32.const 64)) (i32.const 10)) ;; time / 10
+      i32.add
+
+      (i32.div_u (local.get $i) (i32.const 320)) ;; y
+
+      i32.xor ;; (x + time / 10) ^ y
+      (i32.shr_u (i32.const 3)) ;; .. >> 3
+      (i32.and (i32.const 127)) ;; .. & 127
+
+      i32.store8 offset=120 ;; store at pixel index + 120
+
+      (i32.add (local.get $i) (i32.const 1)) ;; i + 1
+      local.tee $i ;; write it back but keep it on the stack
+      (br_if $pixels (i32.lt_s (i32.const 76800))) ;; branch to start of loop if i < 320*240
+    )
+  )
+)

site/static/uw8/skipahead.uw8

@@ -0,0 +1,3 @@
+#ýâI·Þ®aVÁp©v[VLc®ð”Ï^©ȯ½C¾¯M[±ü5ÙÍ$ÊS“.}ñœa'êc®—‡b—þV-=Xù<58>øLguu8­±–—
+9¼\å‚ݯŒhê<<3C>4?zkž½.<2E>¿¤8Š±&/·@ñ6Ö¿þú;8Õ{
.¾8_ó¶^“÷<E2809C>t/kp|£§n•¤,'û>1<>0^4=@†‰{NI
+°b›_=<3D>U`Y¥¶¤=<3D>\ÛÄOÙ¦ˆÑübxh&ñÒgïtO†<4F>;	Þ#“@Hç‘Çîä¸zËΖž©æ+šXwþ¿ï

src/main.rs

@@ -97,7 +97,11 @@ fn load_cart(filename: &Path, uw8: &mut MicroW8, config: &Config) -> Result<()>
 
     if cart[0] >= 10 {
         let src = String::from_utf8(cart)?;
-        cart = curlywas::compile_str(&src, filename, curlywas::Options::default())?;
+        cart = if src.chars().find(|c| !c.is_whitespace()) == Some('(') {
+            wat::parse_str(src)?
+        } else {
+            curlywas::compile_str(&src, filename, curlywas::Options::default())?
+        };
     }
 
     if config.pack {

web/src/main.js

@@ -24,40 +24,39 @@ let pad = 0;
 let keyHandler = (e) => {
     let isKeyDown = e.type == 'keydown';
     let mask;
-    switch(e.code) {
-    case 'ArrowUp':
-        mask = 1;
-        break;
-    case 'ArrowDown':
-        mask = 2;
-        break;
-    case 'ArrowLeft':
-        mask = 4;
-        break;
-    case 'ArrowRight':
-        mask = 8;
-        break;
-    case 'KeyZ':
-        mask = 16;
-        break;
-    case 'KeyX':
-        mask = 32;
-        break;
-    case 'KeyA':
-        mask = 64;
-        break;
-    case 'KeyS':
-        mask = 128;
-        break;
-    case 'KeyR':
-        if(isKeyDown)
-        {
-            runModule(currentData);
-        }
-        break;
+    switch (e.code) {
+        case 'ArrowUp':
+            mask = 1;
+            break;
+        case 'ArrowDown':
+            mask = 2;
+            break;
+        case 'ArrowLeft':
+            mask = 4;
+            break;
+        case 'ArrowRight':
+            mask = 8;
+            break;
+        case 'KeyZ':
+            mask = 16;
+            break;
+        case 'KeyX':
+            mask = 32;
+            break;
+        case 'KeyA':
+            mask = 64;
+            break;
+        case 'KeyS':
+            mask = 128;
+            break;
+        case 'KeyR':
+            if (isKeyDown) {
+                runModule(currentData);
+            }
+            break;
     }
 
-    if(isKeyDown) {
+    if (isKeyDown) {
         pad |= mask;
     } else {
         pad &= ~mask;
@@ -66,7 +65,7 @@ let keyHandler = (e) => {
 window.onkeydown = keyHandler;
 window.onkeyup = keyHandler;
 
-async function runModule(data) {
+async function runModule(data, keepUrl) {
     if (cancelFunction) {
         cancelFunction();
         cancelFunction = null;
@@ -82,15 +81,16 @@ async function runModule(data) {
     currentData = data;
 
     let newURL = window.location.pathname;
-    if (cartridgeSize <= 1024) {
+    if (cartridgeSize <= 1024 && !keepUrl) {
         let dataString = '';
         for (let byte of U8(data)) {
             dataString += String.fromCharCode(byte);
         }
         newURL += '#' + btoa(dataString);
-    }
-    if (newURL != window.location.pathname + window.location.hash) {
-        history.pushState(null, null, newURL);
+
+        if (newURL != window.location.pathname + window.location.hash) {
+            history.pushState(null, null, newURL);
+        }
     }
 
     screen.width = screen.width;
@@ -139,7 +139,7 @@ async function runModule(data) {
 
         let platform_instance = await loadModuleURL(platformUrl);
 
-        for(let name in platform_instance.exports) {
+        for (let name in platform_instance.exports) {
             importObject.env[name] = platform_instance.exports[name]
         }
 
@@ -163,29 +163,29 @@ async function runModule(data) {
             try {
                 let now = Date.now();
                 let restart = false;
-                if(now >= nextFrame) {
+                if (now >= nextFrame) {
                     let gamepads = navigator.getGamepads();
                     let gamepad = 0;
-                    for(let i = 0; i < 4; ++i) {
+                    for (let i = 0; i < 4; ++i) {
                         let pad = gamepads[i];
-                        if(!pad) {
+                        if (!pad) {
                             continue;
                         }
-                        for(let j = 0; j < 8; ++j) {
-                            let buttonIdx = (j+12) % 16;
-                            if(pad.buttons.length > buttonIdx && pad.buttons[buttonIdx].pressed) {
+                        for (let j = 0; j < 8; ++j) {
+                            let buttonIdx = (j + 12) % 16;
+                            if (pad.buttons.length > buttonIdx && pad.buttons[buttonIdx].pressed) {
                                 gamepad |= 1 << (i * 8 + j);
                             }
                         }
-                        if(pad.axes.length > 1) {
-                            for(let j = 0; j < 4; ++j) {
-                                let v = pad.axes[1-(j>>1)];
-                                if(((j & 1) ? v : -v) > 0.5) {
+                        if (pad.axes.length > 1) {
+                            for (let j = 0; j < 4; ++j) {
+                                let v = pad.axes[1 - (j >> 1)];
+                                if (((j & 1) ? v : -v) > 0.5) {
                                     gamepad |= 1 << (i * 8 + j);
                                 }
                             }
                         }
-                        if(pad.buttons.length > 9 && pad.buttons[9].pressed) {
+                        if (pad.buttons.length > 9 && pad.buttons[9].pressed) {
                             restart = true;
                         }
                     }
@@ -203,8 +203,8 @@ async function runModule(data) {
                     canvasCtx.putImageData(imageData, 0, 0);
                     nextFrame = Math.max(nextFrame + timePerFrame, now);
                 }
-                
-                if(restart) {
+
+                if (restart) {
                     runModule(currentData);
                 } else {
                     window.requestAnimationFrame(mainloop);
@@ -220,14 +220,18 @@ async function runModule(data) {
     }
 }
 
-async function runModuleFromURL(url) {
-    runModule(await (await fetch(url)).arrayBuffer());
+async function runModuleFromURL(url, keepUrl) {
+    runModule(await (await fetch(url)).arrayBuffer(), keepUrl);
 }
 
 function runModuleFromHash() {
-    let base64Data = window.location.hash.slice(1);
-    if (base64Data.length > 0) {
-        runModuleFromURL('data:;base64,' + base64Data);
+    let hash = window.location.hash.slice(1);
+    if (hash.length > 0) {
+        if (hash.startsWith("url=")) {
+            runModuleFromURL(hash.slice(4), true);
+        } else {
+            runModuleFromURL('data:;base64,' + hash);
+        }
     } else {
         runModule(new ArrayBuffer(0));
     }