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yishengjiang99 · Apr 13, 2024 · f71a3ef · f71a3ef
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diff --git a/a.out b/a.out
diff --git a/fifolol/Makefile b/fifolol/Makefile
@@ -0,0 +1,16 @@
+all: yofi.wasm.js
+
+clean: src/yofi.c
+	rm -f build/*
+
+build/yofi.ll: clean 
+	clang src/yofi.c -o build/yofi.ll --target=wasm32 -emit-llvm -c -S 
+
+build/yofi.o: build/yofi.ll
+	llc -march=wasm32 -filetype=obj build/yofi.ll -o build/yofi.o
+
+yofi.wasm: build/yofi.o
+	wasm-ld --features=atomics,mutable-global --no-check-features --allow-undefined --import-memory --no-entry --export-all -o yofi.wasm build/yofi.o
+
+yofi.wasm.js: yofi.wasm
+	cat yofi.wasm | npx encode-wasm-uint8 > yofi.wasm.js
diff --git a/fifolol/package.json b/fifolol/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "grep-fifo",
+  "version": "1.0.0",
+  "description": "ES6 compliant and (typescript friendly) implementation of circular fifo in C99",
+  "main": "fifo.wasmodule.js",
+  "scripts": {
+    "build": "docker run --rm -v `pwd`:/src trzeci/emscripten-slim emcc yofi.c -s EXPORT_ALL=1 -o yofi.js",
+    "test": "node ./test.js"
+  },
+  "keywords": [
+    "pain in the arse",
+    "allegedly faster than javascript"
+  ],
+  "author": "",
+  "license": "ISC"
+}
diff --git a/fifolol/song.mid b/fifolol/song.mid
diff --git a/fifolol/src/yofi.c b/fifolol/src/yofi.c
@@ -0,0 +1,25 @@
+#include <stdint.h>
+
+#define QUEUE_SIZE 1 << 16
+
+typedef struct {
+  uint16_t head;
+  uint16_t tail;
+  char data[QUEUE_SIZE];
+} queue_t;
+
+queue_t instance[1];
+
+queue_t* getInstance() { return instance; }
+
+uint16_t queue_count(queue_t* queue) { return queue->head - queue->tail; }
+
+char queue_read(queue_t* queue) {
+  if (queue->tail == queue->head) return 0;
+  return queue->data[queue->tail++];
+}
+
+int queue_write(queue_t* queue, char c) {
+  queue->data[queue->head++] = c;
+  return 0;
+}
diff --git a/fifolol/test.html b/fifolol/test.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="UTF-8">
+	<meta http-equiv="X-UA-Compatible" content="IE=edge">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+	<title>Document</title>
+</head>
+<body>
+	<script type="module">
+		import * as module from "./yofi.wasm.js";
+		const m = new WebAssembly.Module(module.wasmbin);
+		const ll = new WebAssembly.Instance(m, {
+			env: {
+				memory: new WebAssembly.Memory({initial: 41})
+			}
+		});
+		const qq = ll.exports.getInstance();
+		fetch("song.mid").then(r => r.arrayBuffer).then(ab => {
+			const arr = new Uint8Array(ab);
+			let off = 0;
+			while (ll.exports.queue_write(qq, arr[off++]));
+
+		})
+
+
+	</script>
+</body>
+</html>
diff --git a/fifolol/yofi.wasm b/fifolol/yofi.wasm
diff --git a/fifolol/yofi.wasm.js b/fifolol/yofi.wasm.js