From e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d Mon Sep 17 00:00:00 2001 From: Piotr Russ Date: Mon, 16 Nov 2020 00:10:28 +0100 Subject: api, login, auth --- node_modules/@webassemblyjs/wasm-edit/esm/apply.js | 299 +++++++++++++++++++++ 1 file changed, 299 insertions(+) create mode 100644 node_modules/@webassemblyjs/wasm-edit/esm/apply.js (limited to 'node_modules/@webassemblyjs/wasm-edit/esm/apply.js') diff --git a/node_modules/@webassemblyjs/wasm-edit/esm/apply.js b/node_modules/@webassemblyjs/wasm-edit/esm/apply.js new file mode 100644 index 0000000..4c21569 --- /dev/null +++ b/node_modules/@webassemblyjs/wasm-edit/esm/apply.js @@ -0,0 +1,299 @@ +function _sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_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 _slicedToArray(arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return _sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } } + +import { encodeNode } from "@webassemblyjs/wasm-gen"; +import { encodeU32 } from "@webassemblyjs/wasm-gen/lib/encoder"; +import { isFunc, isGlobal, assertHasLoc, orderedInsertNode, getSectionMetadata, traverse, getEndOfSection } from "@webassemblyjs/ast"; +import { resizeSectionByteSize, resizeSectionVecSize, createEmptySection, removeSections } from "@webassemblyjs/helper-wasm-section"; +import { overrideBytesInBuffer } from "@webassemblyjs/helper-buffer"; +import { getSectionForNode } from "@webassemblyjs/helper-wasm-bytecode"; + +function shiftLocNodeByDelta(node, delta) { + 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; + assertHasLoc(oldNode); + var sectionName = getSectionForNode(newNode); + var replacementByteArray = encodeNode(newNode); + /** + * Replace new node as bytes + */ + + uint8Buffer = 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 + 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 + assertHasLoc(node); + var oldNodeSize = encodeNode(oldNode).length; + var bodySizeDeltaBytes = replacementByteArray.length - oldNodeSize; + + if (bodySizeDeltaBytes !== 0) { + var newValue = node.metadata.bodySize + bodySizeDeltaBytes; + var newByteArray = encodeU32(newValue); // function body size byte + // FIXME(sven): only handles one byte u32 + + var start = node.loc.start.column; + var end = start + 1; + uint8Buffer = overrideBytesInBuffer(uint8Buffer, start, end, newByteArray); + } + } + } + }); + } + /** + * Update section size + */ + + + var deltaBytes = replacementByteArray.length - ( // $FlowIgnore: assertHasLoc ensures that + 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 + + assertHasLoc(node); + var sectionName = getSectionForNode(node); + + if (sectionName === "start") { + var sectionMetadata = getSectionMetadata(ast, "start"); + /** + * The start section only contains one element, + * we need to remove the whole section + */ + + uint8Buffer = 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 = 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 = getSectionForNode(node); + var sectionMetadata = getSectionMetadata(ast, sectionName); // Section doesn't exists, we create an empty one + + if (typeof sectionMetadata === "undefined") { + var res = createEmptySection(ast, uint8Buffer, sectionName); + uint8Buffer = res.uint8Buffer; + sectionMetadata = res.sectionMetadata; + } + /** + * check that the expressions were ended + */ + + + if (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 (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 = 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 = getEndOfSection(sectionMetadata); + var end = start; + /** + * Update section + */ + + var deltaBytes = newByteArray.length; + uint8Buffer = 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") { + orderedInsertNode(ast.body[0], node); + } + + return { + uint8Buffer: uint8Buffer, + deltaBytes: deltaBytes, + deltaElements: deltaElements + }; +} + +export 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 = getSectionForNode(op.node); + break; + + case "delete": + state = applyDelete(ast, uint8Buffer, op.node); + sectionName = getSectionForNode(op.node); + break; + + case "add": + state = applyAdd(ast, uint8Buffer, op.node); + sectionName = 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 = 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 = 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 -- cgit v1.2.3