text: /*
   * Copyright (c) 2016 Ambroz Bizjak
   * All rights reserved.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef APRINTER_TRANSFER_VECTOR_H
  #define APRINTER_TRANSFER_VECTOR_H
  
  #include <stddef.h>
  
  namespace APrinter {
  
  template <typename DataWordType>
  struct TransferDescriptor {
      DataWordType *buffer_ptr;
      size_t num_words;
  };
  
  template <typename DataWordType>
  struct TransferVector {
      TransferDescriptor<DataWordType> const *descriptors;
      int num_descriptors;
  };
  
  template <typename DataWordType>
  bool CheckTransferVector (TransferVector<DataWordType> vector, size_t num_words)
  {
      for (int i = 0; i < vector.num_descriptors; i++) {
          if (vector.descriptors[i].num_words == 0) {
              return false;
          }
          num_words -= vector.descriptors[i].num_words;
      }
      return (num_words == 0);
  }
  
  }
  
  #endif
  