2 files changed, 452 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/wasm-edit/lib/apply.js b/node_modules/@webassemblyjs/wasm-edit/lib/apply.js
new file mode 100644
index 00000000..cdb6d1bc
--- /dev/null
+++ b/node_modules/@webassemblyjs/wasm-edit/lib/apply.js
@@ -0,0 +1,318 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.applyOperations = applyOperations;
+
+var _wasmGen = require("@webassemblyjs/wasm-gen");
+
+var _encoder = require("@webassemblyjs/wasm-gen/lib/encoder");
+
+var _ast = require("@webassemblyjs/ast");
+
+var _helperWasmSection = require("@webassemblyjs/helper-wasm-section");
+
+var _helperBuffer = require("@webassemblyjs/helper-buffer");
+
+var _helperWasmBytecode = require("@webassemblyjs/helper-wasm-bytecode");
+
+function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _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 _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
+
+function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
+
+function shiftLocNodeByDelta(node, delta) {
+  (0, _ast.assertHasLoc)(node); // $FlowIgnore: assertHasLoc ensures that
+
+  node.loc.start.column += delta; // $FlowIgnore: assertHasLoc ensures that
+
+  node.loc.end.column += delta;
+}
+
+function applyUpdate(ast, uint8Buffer, _ref) {
+  var _ref2 = _slicedToArray(_ref, 2),
+      oldNode = _ref2[0],
+      newNode = _ref2[1];
+
+  var deltaElements = 0;
+  (0, _ast.assertHasLoc)(oldNode);
+  var sectionName = (0, _helperWasmBytecode.getSectionForNode)(newNode);
+  var replacementByteArray = (0, _wasmGen.encodeNode)(newNode);
+  /**
+   * Replace new node as bytes
+   */
+
+  uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, // $FlowIgnore: assertHasLoc ensures that
+  oldNode.loc.start.column, // $FlowIgnore: assertHasLoc ensures that
+  oldNode.loc.end.column, replacementByteArray);
+  /**
+   * Update function body size if needed
+   */
+
+  if (sectionName === "code") {
+    // Find the parent func
+    (0, _ast.traverse)(ast, {
+      Func: function Func(_ref3) {
+        var node = _ref3.node;
+        var funcHasThisIntr = node.body.find(function (n) {
+          return n === newNode;
+        }) !== undefined; // Update func's body size if needed
+
+        if (funcHasThisIntr === true) {
+          // These are the old functions locations informations
+          (0, _ast.assertHasLoc)(node);
+          var oldNodeSize = (0, _wasmGen.encodeNode)(oldNode).length;
+          var bodySizeDeltaBytes = replacementByteArray.length - oldNodeSize;
+
+          if (bodySizeDeltaBytes !== 0) {
+            var newValue = node.metadata.bodySize + bodySizeDeltaBytes;
+            var newByteArray = (0, _encoder.encodeU32)(newValue); // function body size byte
+            // FIXME(sven): only handles one byte u32
+
+            var start = node.loc.start.column;
+            var end = start + 1;
+            uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start, end, newByteArray);
+          }
+        }
+      }
+    });
+  }
+  /**
+   * Update section size
+   */
+
+
+  var deltaBytes = replacementByteArray.length - (oldNode.loc.end.column - oldNode.loc.start.column); // Init location informations
+
+  newNode.loc = {
+    start: {
+      line: -1,
+      column: -1
+    },
+    end: {
+      line: -1,
+      column: -1
+    }
+  }; // Update new node end position
+  // $FlowIgnore: assertHasLoc ensures that
+
+  newNode.loc.start.column = oldNode.loc.start.column; // $FlowIgnore: assertHasLoc ensures that
+
+  newNode.loc.end.column = // $FlowIgnore: assertHasLoc ensures that
+  oldNode.loc.start.column + replacementByteArray.length;
+  return {
+    uint8Buffer: uint8Buffer,
+    deltaBytes: deltaBytes,
+    deltaElements: deltaElements
+  };
+}
+
+function applyDelete(ast, uint8Buffer, node) {
+  var deltaElements = -1; // since we removed an element
+
+  (0, _ast.assertHasLoc)(node);
+  var sectionName = (0, _helperWasmBytecode.getSectionForNode)(node);
+
+  if (sectionName === "start") {
+    var sectionMetadata = (0, _ast.getSectionMetadata)(ast, "start");
+    /**
+     * The start section only contains one element,
+     * we need to remove the whole section
+     */
+
+    uint8Buffer = (0, _helperWasmSection.removeSections)(ast, uint8Buffer, "start");
+
+    var _deltaBytes = -(sectionMetadata.size.value + 1);
+    /* section id */
+
+
+    return {
+      uint8Buffer: uint8Buffer,
+      deltaBytes: _deltaBytes,
+      deltaElements: deltaElements
+    };
+  } // replacement is nothing
+
+
+  var replacement = [];
+  uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, // $FlowIgnore: assertHasLoc ensures that
+  node.loc.start.column, // $FlowIgnore: assertHasLoc ensures that
+  node.loc.end.column, replacement);
+  /**
+   * Update section
+   */
+  // $FlowIgnore: assertHasLoc ensures that
+
+  var deltaBytes = -(node.loc.end.column - node.loc.start.column);
+  return {
+    uint8Buffer: uint8Buffer,
+    deltaBytes: deltaBytes,
+    deltaElements: deltaElements
+  };
+}
+
+function applyAdd(ast, uint8Buffer, node) {
+  var deltaElements = +1; // since we added an element
+
+  var sectionName = (0, _helperWasmBytecode.getSectionForNode)(node);
+  var sectionMetadata = (0, _ast.getSectionMetadata)(ast, sectionName); // Section doesn't exists, we create an empty one
+
+  if (typeof sectionMetadata === "undefined") {
+    var res = (0, _helperWasmSection.createEmptySection)(ast, uint8Buffer, sectionName);
+    uint8Buffer = res.uint8Buffer;
+    sectionMetadata = res.sectionMetadata;
+  }
+  /**
+   * check that the expressions were ended
+   */
+
+
+  if ((0, _ast.isFunc)(node)) {
+    // $FlowIgnore
+    var body = node.body;
+
+    if (body.length === 0 || body[body.length - 1].id !== "end") {
+      throw new Error("expressions must be ended");
+    }
+  }
+
+  if ((0, _ast.isGlobal)(node)) {
+    // $FlowIgnore
+    var body = node.init;
+
+    if (body.length === 0 || body[body.length - 1].id !== "end") {
+      throw new Error("expressions must be ended");
+    }
+  }
+  /**
+   * Add nodes
+   */
+
+
+  var newByteArray = (0, _wasmGen.encodeNode)(node); // The size of the section doesn't include the storage of the size itself
+  // we need to manually add it here
+
+  var start = (0, _ast.getEndOfSection)(sectionMetadata);
+  var end = start;
+  /**
+   * Update section
+   */
+
+  var deltaBytes = newByteArray.length;
+  uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start, end, newByteArray);
+  node.loc = {
+    start: {
+      line: -1,
+      column: start
+    },
+    end: {
+      line: -1,
+      column: start + deltaBytes
+    }
+  }; // for func add the additional metadata in the AST
+
+  if (node.type === "Func") {
+    // the size is the first byte
+    // FIXME(sven): handle LEB128 correctly here
+    var bodySize = newByteArray[0];
+    node.metadata = {
+      bodySize: bodySize
+    };
+  }
+
+  if (node.type !== "IndexInFuncSection") {
+    (0, _ast.orderedInsertNode)(ast.body[0], node);
+  }
+
+  return {
+    uint8Buffer: uint8Buffer,
+    deltaBytes: deltaBytes,
+    deltaElements: deltaElements
+  };
+}
+
+function applyOperations(ast, uint8Buffer, ops) {
+  ops.forEach(function (op) {
+    var state;
+    var sectionName;
+
+    switch (op.kind) {
+      case "update":
+        state = applyUpdate(ast, uint8Buffer, [op.oldNode, op.node]);
+        sectionName = (0, _helperWasmBytecode.getSectionForNode)(op.node);
+        break;
+
+      case "delete":
+        state = applyDelete(ast, uint8Buffer, op.node);
+        sectionName = (0, _helperWasmBytecode.getSectionForNode)(op.node);
+        break;
+
+      case "add":
+        state = applyAdd(ast, uint8Buffer, op.node);
+        sectionName = (0, _helperWasmBytecode.getSectionForNode)(op.node);
+        break;
+
+      default:
+        throw new Error("Unknown operation");
+    }
+    /**
+     * Resize section vec size.
+     * If the length of the LEB-encoded size changes, this can change
+     * the byte length of the section and the offset for nodes in the
+     * section. So we do this first before resizing section byte size
+     * or shifting following operations' nodes.
+     */
+
+
+    if (state.deltaElements !== 0 && sectionName !== "start") {
+      var oldBufferLength = state.uint8Buffer.length;
+      state.uint8Buffer = (0, _helperWasmSection.resizeSectionVecSize)(ast, state.uint8Buffer, sectionName, state.deltaElements); // Infer bytes added/removed by comparing buffer lengths
+
+      state.deltaBytes += state.uint8Buffer.length - oldBufferLength;
+    }
+    /**
+     * Resize section byte size.
+     * If the length of the LEB-encoded size changes, this can change
+     * the offset for nodes in the section. So we do this before
+     * shifting following operations' nodes.
+     */
+
+
+    if (state.deltaBytes !== 0 && sectionName !== "start") {
+      var _oldBufferLength = state.uint8Buffer.length;
+      state.uint8Buffer = (0, _helperWasmSection.resizeSectionByteSize)(ast, state.uint8Buffer, sectionName, state.deltaBytes); // Infer bytes added/removed by comparing buffer lengths
+
+      state.deltaBytes += state.uint8Buffer.length - _oldBufferLength;
+    }
+    /**
+     * Shift following operation's nodes
+     */
+
+
+    if (state.deltaBytes !== 0) {
+      ops.forEach(function (op) {
+        // We don't need to handle add ops, they are positioning independent
+        switch (op.kind) {
+          case "update":
+            shiftLocNodeByDelta(op.oldNode, state.deltaBytes);
+            break;
+
+          case "delete":
+            shiftLocNodeByDelta(op.node, state.deltaBytes);
+            break;
+        }
+      });
+    }
+
+    uint8Buffer = state.uint8Buffer;
+  });
+  return uint8Buffer;
+}
+\ No newline at end of file
diff --git a/node_modules/@webassemblyjs/wasm-edit/lib/index.js b/node_modules/@webassemblyjs/wasm-edit/lib/index.js
new file mode 100644
index 00000000..02f6c5e0
--- /dev/null
+++ b/node_modules/@webassemblyjs/wasm-edit/lib/index.js
@@ -0,0 +1,134 @@
+"use strict";
+
+function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.edit = edit;
+exports.editWithAST = editWithAST;
+exports.add = add;
+exports.addWithAST = addWithAST;
+
+var _wasmParser = require("@webassemblyjs/wasm-parser");
+
+var _ast = require("@webassemblyjs/ast");
+
+var _clone = require("@webassemblyjs/ast/lib/clone");
+
+var _wasmOpt = require("@webassemblyjs/wasm-opt");
+
+var _helperWasmBytecode = _interopRequireWildcard(require("@webassemblyjs/helper-wasm-bytecode"));
+
+var _apply = require("./apply");
+
+function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
+
+function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
+
+function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
+
+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 hashNode(node) {
+  return JSON.stringify(node);
+}
+
+function preprocess(ab) {
+  var optBin = (0, _wasmOpt.shrinkPaddedLEB128)(new Uint8Array(ab));
+  return optBin.buffer;
+}
+
+function sortBySectionOrder(nodes) {
+  var originalOrder = new Map();
+
+  var _iterator = _createForOfIteratorHelper(nodes),
+      _step;
+
+  try {
+    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+      var node = _step.value;
+      originalOrder.set(node, originalOrder.size);
+    }
+  } catch (err) {
+    _iterator.e(err);
+  } finally {
+    _iterator.f();
+  }
+
+  nodes.sort(function (a, b) {
+    var sectionA = (0, _helperWasmBytecode.getSectionForNode)(a);
+    var sectionB = (0, _helperWasmBytecode.getSectionForNode)(b);
+    var aId = _helperWasmBytecode["default"].sections[sectionA];
+    var bId = _helperWasmBytecode["default"].sections[sectionB];
+
+    if (typeof aId !== "number" || typeof bId !== "number") {
+      throw new Error("Section id not found");
+    }
+
+    if (aId === bId) {
+      // $FlowIgnore originalOrder is filled for all nodes
+      return originalOrder.get(a) - originalOrder.get(b);
+    }
+
+    return aId - bId;
+  });
+}
+
+function edit(ab, visitors) {
+  ab = preprocess(ab);
+  var ast = (0, _wasmParser.decode)(ab);
+  return editWithAST(ast, ab, visitors);
+}
+
+function editWithAST(ast, ab, visitors) {
+  var operations = [];
+  var uint8Buffer = new Uint8Array(ab);
+  var nodeBefore;
+
+  function before(type, path) {
+    nodeBefore = (0, _clone.cloneNode)(path.node);
+  }
+
+  function after(type, path) {
+    if (path.node._deleted === true) {
+      operations.push({
+        kind: "delete",
+        node: path.node
+      }); // $FlowIgnore
+    } else if (hashNode(nodeBefore) !== hashNode(path.node)) {
+      operations.push({
+        kind: "update",
+        oldNode: nodeBefore,
+        node: path.node
+      });
+    }
+  }
+
+  (0, _ast.traverse)(ast, visitors, before, after);
+  uint8Buffer = (0, _apply.applyOperations)(ast, uint8Buffer, operations);
+  return uint8Buffer.buffer;
+}
+
+function add(ab, newNodes) {
+  ab = preprocess(ab);
+  var ast = (0, _wasmParser.decode)(ab);
+  return addWithAST(ast, ab, newNodes);
+}
+
+function addWithAST(ast, ab, newNodes) {
+  // Sort nodes by insertion order
+  sortBySectionOrder(newNodes);
+  var uint8Buffer = new Uint8Array(ab); // Map node into operations
+
+  var operations = newNodes.map(function (n) {
+    return {
+      kind: "add",
+      node: n
+    };
+  });
+  uint8Buffer = (0, _apply.applyOperations)(ast, uint8Buffer, operations);
+  return uint8Buffer.buffer;
+}
+\ No newline at end of file