Method toBuffer

test/fixtures/wpt/wasm/jsapi/wasm-module-builder.js:1196–1583

(debug = false)

  }

  toBuffer(debug = false) {
    let binary = new Binary;
    let wasm = this;

    // Add header
    binary.emit_header();

    // Add type section
    if (wasm.types.length > 0) {
      if (debug) print('emitting types @ ' + binary.length);
      binary.emit_section(kTypeSectionCode, section => {
        let length_with_groups = wasm.types.length;
        for (let group of wasm.rec_groups) {
          length_with_groups -= group.size - 1;
        }
        section.emit_u32v(length_with_groups);

        let rec_group_index = 0;

        for (let i = 0; i < wasm.types.length; i++) {
          if (rec_group_index < wasm.rec_groups.length &&
              wasm.rec_groups[rec_group_index].start == i) {
            section.emit_u8(kWasmRecursiveTypeGroupForm);
            section.emit_u32v(wasm.rec_groups[rec_group_index].size);
            rec_group_index++;
          }

          let type = wasm.types[i];
          if (type.supertype != kNoSuperType) {
            section.emit_u8(type.is_final ? kWasmSubtypeFinalForm
                                          : kWasmSubtypeForm);
            section.emit_u8(1);  // supertype count
            section.emit_u32v(type.supertype);
          } else if (!type.is_final) {
            section.emit_u8(kWasmSubtypeForm);
            section.emit_u8(0);  // no supertypes
          }
          if (type instanceof WasmStruct) {
            section.emit_u8(kWasmStructTypeForm);
            section.emit_u32v(type.fields.length);
            for (let field of type.fields) {
              section.emit_type(field.type);
              section.emit_u8(field.mutability ? 1 : 0);
            }
          } else if (type instanceof WasmArray) {
            section.emit_u8(kWasmArrayTypeForm);
            section.emit_type(type.type);
            section.emit_u8(type.mutability ? 1 : 0);
          } else {
            section.emit_u8(kWasmFunctionTypeForm);
            section.emit_u32v(type.params.length);
            for (let param of type.params) {
              section.emit_type(param);
            }
            section.emit_u32v(type.results.length);
            for (let result of type.results) {
              section.emit_type(result);
            }