shift73k/assets_old/node_modules/@webassemblyjs/wasm-edit/lib/index.js

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"use strict";
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 _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
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 _iteratorNormalCompletion = true;
var _didIteratorError = false;
var _iteratorError = undefined;
try {
for (var _iterator = nodes[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
var _node = _step.value;
originalOrder.set(_node, originalOrder.size);
}
} catch (err) {
_didIteratorError = true;
_iteratorError = err;
} finally {
try {
if (!_iteratorNormalCompletion && _iterator.return != null) {
_iterator.return();
}
} finally {
if (_didIteratorError) {
throw _iteratorError;
}
}
}
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;
}