8 files changed, 309 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/utf8/lib/decoder.js b/node_modules/@webassemblyjs/utf8/lib/decoder.js
new file mode 100644
index 00000000..305a2b6e
--- /dev/null
+++ b/node_modules/@webassemblyjs/utf8/lib/decoder.js
@@ -0,0 +1,74 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.decode = decode;
+
+function con(b) {
+  if ((b & 0xc0) === 0x80) {
+    return b & 0x3f;
+  } else {
+    throw new Error("invalid UTF-8 encoding");
+  }
+}
+
+function code(min, n) {
+  if (n < min || 0xd800 <= n && n < 0xe000 || n >= 0x10000) {
+    throw new Error("invalid UTF-8 encoding");
+  } else {
+    return n;
+  }
+}
+
+function decode(bytes) {
+  return _decode(bytes).map(function (x) {
+    return String.fromCharCode(x);
+  }).join("");
+}
+
+function _decode(bytes) {
+  var result = [];
+
+  while (bytes.length > 0) {
+    var b1 = bytes[0];
+
+    if (b1 < 0x80) {
+      result.push(code(0x0, b1));
+      bytes = bytes.slice(1);
+      continue;
+    }
+
+    if (b1 < 0xc0) {
+      throw new Error("invalid UTF-8 encoding");
+    }
+
+    var b2 = bytes[1];
+
+    if (b1 < 0xe0) {
+      result.push(code(0x80, ((b1 & 0x1f) << 6) + con(b2)));
+      bytes = bytes.slice(2);
+      continue;
+    }
+
+    var b3 = bytes[2];
+
+    if (b1 < 0xf0) {
+      result.push(code(0x800, ((b1 & 0x0f) << 12) + (con(b2) << 6) + con(b3)));
+      bytes = bytes.slice(3);
+      continue;
+    }
+
+    var b4 = bytes[3];
+
+    if (b1 < 0xf8) {
+      result.push(code(0x10000, (((b1 & 0x07) << 18) + con(b2) << 12) + (con(b3) << 6) + con(b4)));
+      bytes = bytes.slice(4);
+      continue;
+    }
+
+    throw new Error("invalid UTF-8 encoding");
+  }
+
+  return result;
+}
+\ No newline at end of file
diff --git a/node_modules/@webassemblyjs/utf8/lib/encoder.js b/node_modules/@webassemblyjs/utf8/lib/encoder.js
new file mode 100644
index 00000000..5ed0f03d
--- /dev/null
+++ b/node_modules/@webassemblyjs/utf8/lib/encoder.js
@@ -0,0 +1,67 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.encode = encode;
+
+function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); }
+
+function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
+
+function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) return _arrayLikeToArray(arr); }
+
+function _toArray(arr) { return _arrayWithHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableRest(); }
+
+function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
+
+function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
+
+function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
+
+function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter); }
+
+function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
+
+function con(n) {
+  return 0x80 | n & 0x3f;
+}
+
+function encode(str) {
+  var arr = str.split("").map(function (x) {
+    return x.charCodeAt(0);
+  });
+  return _encode(arr);
+}
+
+function _encode(arr) {
+  if (arr.length === 0) {
+    return [];
+  }
+
+  var _arr = _toArray(arr),
+      n = _arr[0],
+      ns = _arr.slice(1);
+
+  if (n < 0) {
+    throw new Error("utf8");
+  }
+
+  if (n < 0x80) {
+    return [n].concat(_toConsumableArray(_encode(ns)));
+  }
+
+  if (n < 0x800) {
+    return [0xc0 | n >>> 6, con(n)].concat(_toConsumableArray(_encode(ns)));
+  }
+
+  if (n < 0x10000) {
+    return [0xe0 | n >>> 12, con(n >>> 6), con(n)].concat(_toConsumableArray(_encode(ns)));
+  }
+
+  if (n < 0x110000) {
+    return [0xf0 | n >>> 18, con(n >>> 12), con(n >>> 6), con(n)].concat(_toConsumableArray(_encode(ns)));
+  }
+
+  throw new Error("utf8");
+}
+\ No newline at end of file
diff --git a/node_modules/@webassemblyjs/utf8/lib/index.js b/node_modules/@webassemblyjs/utf8/lib/index.js
new file mode 100644
index 00000000..fef94701
--- /dev/null
+++ b/node_modules/@webassemblyjs/utf8/lib/index.js
@@ -0,0 +1,21 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+Object.defineProperty(exports, "decode", {
+  enumerable: true,
+  get: function get() {
+    return _decoder.decode;
+  }
+});
+Object.defineProperty(exports, "encode", {
+  enumerable: true,
+  get: function get() {
+    return _encoder.encode;
+  }
+});
+
+var _decoder = require("./decoder");
+
+var _encoder = require("./encoder");
+\ No newline at end of file
diff --git a/node_modules/@webassemblyjs/utf8/package.json b/node_modules/@webassemblyjs/utf8/package.json
new file mode 100644
index 00000000..3da38eb1
--- /dev/null
+++ b/node_modules/@webassemblyjs/utf8/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "@webassemblyjs/utf8",
+  "version": "1.11.6",
+  "description": "UTF8 encoder/decoder for WASM",
+  "main": "lib/index.js",
+  "module": "esm/index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/xtuc/webassemblyjs.git"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "author": "Sven Sauleau",
+  "license": "MIT"
+}
diff --git a/node_modules/@webassemblyjs/utf8/src/decoder.js b/node_modules/@webassemblyjs/utf8/src/decoder.js
new file mode 100644
index 00000000..de80d125
--- /dev/null
+++ b/node_modules/@webassemblyjs/utf8/src/decoder.js
@@ -0,0 +1,67 @@
+function con(b) {
+  if ((b & 0xc0) === 0x80) {
+    return b & 0x3f;
+  } else {
+    throw new Error("invalid UTF-8 encoding");
+  }
+}
+
+function code(min, n) {
+  if (n < min || (0xd800 <= n && n < 0xe000) || n >= 0x10000) {
+    throw new Error("invalid UTF-8 encoding");
+  } else {
+    return n;
+  }
+}
+
+export function decode(bytes) {
+  return _decode(bytes)
+    .map((x) => String.fromCharCode(x))
+    .join("");
+}
+
+function _decode(bytes) {
+  const result = [];
+  while (bytes.length > 0) {
+    const b1 = bytes[0];
+    if (b1 < 0x80) {
+      result.push(code(0x0, b1));
+      bytes = bytes.slice(1);
+      continue;
+    }
+
+    if (b1 < 0xc0) {
+      throw new Error("invalid UTF-8 encoding");
+    }
+
+    const b2 = bytes[1];
+    if (b1 < 0xe0) {
+      result.push(code(0x80, ((b1 & 0x1f) << 6) + con(b2)));
+      bytes = bytes.slice(2);
+      continue;
+    }
+
+    const b3 = bytes[2];
+    if (b1 < 0xf0) {
+      result.push(code(0x800, ((b1 & 0x0f) << 12) + (con(b2) << 6) + con(b3)));
+      bytes = bytes.slice(3);
+      continue;
+    }
+
+    const b4 = bytes[3];
+    if (b1 < 0xf8) {
+      result.push(
+        code(
+          0x10000,
+          ((((b1 & 0x07) << 18) + con(b2)) << 12) + (con(b3) << 6) + con(b4)
+        )
+      );
+      bytes = bytes.slice(4);
+      continue;
+    }
+
+    throw new Error("invalid UTF-8 encoding");
+  }
+
+  return result;
+}
diff --git a/node_modules/@webassemblyjs/utf8/src/encoder.js b/node_modules/@webassemblyjs/utf8/src/encoder.js
new file mode 100644
index 00000000..b17951fd
--- /dev/null
+++ b/node_modules/@webassemblyjs/utf8/src/encoder.js
@@ -0,0 +1,44 @@
+function con(n) {
+  return 0x80 | (n & 0x3f);
+}
+
+export function encode(str) {
+  const arr = str.split("").map((x) => x.charCodeAt(0));
+  return _encode(arr);
+}
+
+function _encode(arr) {
+  if (arr.length === 0) {
+    return [];
+  }
+
+  const [n, ...ns] = arr;
+
+  if (n < 0) {
+    throw new Error("utf8");
+  }
+
+  if (n < 0x80) {
+    return [n, ..._encode(ns)];
+  }
+
+  if (n < 0x800) {
+    return [0xc0 | (n >>> 6), con(n), ..._encode(ns)];
+  }
+
+  if (n < 0x10000) {
+    return [0xe0 | (n >>> 12), con(n >>> 6), con(n), ..._encode(ns)];
+  }
+
+  if (n < 0x110000) {
+    return [
+      0xf0 | (n >>> 18),
+      con(n >>> 12),
+      con(n >>> 6),
+      con(n),
+      ..._encode(ns),
+    ];
+  }
+
+  throw new Error("utf8");
+}
diff --git a/node_modules/@webassemblyjs/utf8/src/index.js b/node_modules/@webassemblyjs/utf8/src/index.js
new file mode 100644
index 00000000..82cf9a70
--- /dev/null
+++ b/node_modules/@webassemblyjs/utf8/src/index.js
@@ -0,0 +1,4 @@
+// @flow
+
+export { decode } from "./decoder";
+export { encode } from "./encoder";
diff --git a/node_modules/@webassemblyjs/utf8/test/index.js b/node_modules/@webassemblyjs/utf8/test/index.js
new file mode 100644
index 00000000..dabdc6ca
--- /dev/null
+++ b/node_modules/@webassemblyjs/utf8/test/index.js
@@ -0,0 +1,13 @@
+const { assert } = require("chai");
+
+const { decode, encode } = require("../lib");
+
+describe("UTF8", () => {
+  it("should f-1(f(x)) = x", () => {
+    assert.equal(decode(encode("foo")), "foo");
+    assert.equal(decode(encode("éé")), "éé");
+
+    // TODO(sven): utf8 encoder fails here
+    // assert.equal(decode(encode("🤣见見")), "🤣见見");
+  });
+});