initial

2026-04-22 04:27:57 +00:00 · 2017-04-12 13:58:22 +03:00
commit 08ac853719
4 changed files with 83 additions and 0 deletions
@@ -0,0 +1 @@
+out
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# "Compile rust source and put it as a tested contract"
+
+mkdir -p out
+rustc $1 -o out/contract.js -O --target wasm32-unknown-emscripten
@@ -0,0 +1,74 @@
+<html>
+<head>
+  <script>
+    // Check for wasm support.
+    if (!('WebAssembly' in window)) {
+      alert('you need a browser with wasm support enabled :(');
+    }
+
+    function loadWebAssembly(filename, imports) {
+      return fetch(filename)
+        .then(response => response.arrayBuffer())
+        .then(buffer => WebAssembly.compile(buffer))
+        .then(module => {
+          imports = imports || {};
+          imports.env = imports.env || {};
+          var env = imports.env;
+          imports.env.memoryBase = imports.env.memoryBase || 0;
+          imports.env.tableBase = imports.env.tableBase || 0;
+
+          /* rust/emscripten imports
+            (import "env" "DYNAMICTOP_PTR" (global (;0;) i32))
+            (import "env" "STACKTOP" (global (;1;) i32))
+            (import "env" "STACK_MAX" (global (;2;) i32))
+            (import "env" "enlargeMemory" (func (;0;) (type 0)))
+            (import "env" "getTotalMemory" (func (;1;) (type 0)))
+            (import "env" "abortOnCannotGrowMemory" (func (;2;) (type 0)))
+            (import "env" "_abort" (func (;3;) (type 1)))
+            (import "env" "___setErrNo" (func (;4;) (type 2)))
+
+            (import "env" "memory" (memory (;0;) 256 256))
+            (import "env" "table" (table (;0;) 0 0 anyfunc))
+            (import "env" "memoryBase" (global (;3;) i32))
+            (import "env" "tableBase" (global (;4;) i32))
+          */
+
+          env.DYNAMICTOP_PTR = env.DYNAMICTOP_PTR || 0;
+          env.STACKTOP = env.STACKTOP || 0;
+          env.STACK_MAX = env.STACK_MAX || 0;
+          env.enlargeMemory = env.enlargeMemory || function() { throw "error enlarging memory"; };
+          env.getTotalMemory = env.getTotalMemory || function() { return 65536 * 256; };
+          env.abortOnCannotGrowMemory = env.abortOnCannotGrowMemory || function() { throw "abort growing memory"; };
+          env._abort = env.abortOnCannotGrowMemory || function() { throw "abort"; };
+          env.___setErrNo = env.abortOnCannotGrowMemory || function() { throw "setting error no"; };
+          env.memoryBase = env.memoryBase || 0;
+          env.tableBase = env.tableBase || 0;
+
+          if (!imports.env.memory) {
+            imports.env.memory = new WebAssembly.Memory({ initial: 256 });
+          }
+          if (!imports.env.table) {
+            imports.env.table = new WebAssembly.Table({ initial: 0, element: 'anyfunc' });
+          }
+          return new WebAssembly.Instance(module, imports);
+        });
+    }
+
+    loadWebAssembly('out/contract.wasm')
+      .then(instance => {
+        var exports = instance.exports;
+        var call = exports._call;
+        var button = document.getElementById('do-call');
+        button.value = 'Execute call';
+        button.addEventListener('click', function() {
+            call();
+        }, false);
+      }
+    );
+
+  </script>
+</head>
+<body>
+  <input type="button" id="do-call" value="(waiting for WebAssembly)"/>
+</body>
+</html>
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+#!/bin/sh
+python -m SimpleHTTPServer 8000