Method allocRawBytes

web/src/memory.ts:357–378

* Allocate space by number of bytes * @param nbytes Number of bytes. * Note: This function always allocate space that aligns to 64bit.

(nbytes: number)

    * Note: This function always allocate space that aligns to 64bit.
   */
  allocRawBytes(nbytes: number): PtrOffset {
    // always aligns to 64bit
    nbytes = ((nbytes + 7) >> 3) << 3;

    if (this.stackTop + nbytes > this.buffer.byteLength) {
      const newSize = Math.max(
        this.buffer.byteLength * 2,
        this.stackTop + nbytes
      );
      const oldU8 = this.viewU8;
      this.buffer = new ArrayBuffer(newSize);
      this.updateViews();
      this.viewU8.set(oldU8);
      if (this.basePtr != 0) {
        this.cFreeSpace(this.basePtr);
      }
      this.basePtr = this.cAllocSpace(newSize);
    }
    const retOffset = this.stackTop;
    this.stackTop += nbytes;
    return retOffset;
  }

  /**
   * Allocate space for pointers.