How to use @webassemblyjs/helper-wasm-section - 10 common examples

function applyAdd(ast: Program, uint8Buffer: Uint8Array, node: Node): State {
  const deltaElements = +1; // since we added an element

  const sectionName = getSectionForNode(node);

  let sectionMetadata = getSectionMetadata(ast, sectionName);

  // Section doesn't exists, we create an empty one
  if (typeof sectionMetadata === "undefined") {
    const res = createEmptySection(ast, uint8Buffer, sectionName);

    uint8Buffer = res.uint8Buffer;
    sectionMetadata = res.sectionMetadata;
  }

  /**
   * Add nodes
   */
  const newByteArray = encodeNode(node);

  // The size of the section doesn't include the storage of the size itself
  // we need to manually add it here
  const start = getEndOfSection(sectionMetadata);

  const end = start;

function applyAdd(ast: Program, uint8Buffer: Uint8Array, node: Node): State {
  const deltaElements = +1; // since we added an element

  const sectionName = getSectionForNode(node);

  let sectionMetadata = getSectionMetadata(ast, sectionName);

  // Section doesn't exists, we create an empty one
  if (typeof sectionMetadata === "undefined") {
    const res = createEmptySection(ast, uint8Buffer, sectionName);

    uint8Buffer = res.uint8Buffer;
    sectionMetadata = res.sectionMetadata;
  }

  /**
   * check that the expressions were ended
   */
  if (isFunc(node)) {
    // $FlowIgnore
    CHECK_END(node.body);
  }

  if (isGlobal(node)) {
    // $FlowIgnore
    CHECK_END(node.init);

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");
    }
  }

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;
  }
  /**
   * 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
   */

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

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

function applyDelete(ast: Program, uint8Buffer: Uint8Array, node: Node): State {
  const deltaElements = -1; // since we removed an element

  assertHasLoc(node);

  const sectionName = getSectionForNode(node);

  if (sectionName === "start") {
    const sectionMetadata = getSectionMetadata(ast, "start");

    /**
     * The start section only contains one element,
     * we need to remove the whole section
     */
    uint8Buffer = removeSections(ast, uint8Buffer, "start");

    const deltaBytes = -(sectionMetadata.size.value + 1); /* section id */

    return { uint8Buffer, deltaBytes, deltaElements };
  }

  // replacement is nothing
  const replacement = [];

  uint8Buffer = overrideBytesInBuffer(
    uint8Buffer,
    // $FlowIgnore: assertHasLoc ensures that
    node.loc.start.column,
    // $FlowIgnore: assertHasLoc ensures that
    node.loc.end.column,
    replacement

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;

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;

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") {
      const 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(op => {
        // We don't need to handle add ops, they are positioning independent
        switch (op.kind) {