/**
 * @author: Jeff Thompson
 * Derived from Name.js by Meki Cheraoui.
 * See COPYING for copyright and distribution information.
 */

#include "BinaryXMLEncoder.h"
#include "BinaryXMLDecoder.h"
#include "BinaryXMLName.h"

ndn_Error ndn_encodeBinaryXMLName(struct ndn_Name *name, struct ndn_BinaryXMLEncoder *encoder)
{
  ndn_Error error;
  if (error = ndn_BinaryXMLEncoder_writeElementStartDTag(encoder, ndn_BinaryXML_DTag_Name))
    return error;
  
  unsigned int i;
  for (i = 0; i < name->nComponents; ++i) {
    if (error = ndn_BinaryXMLEncoder_writeBlobDTagElement
        (encoder, ndn_BinaryXML_DTag_Component, name->components[i].value, name->components[i].valueLength))
      return error;
	}
  
	if (error = ndn_BinaryXMLEncoder_writeElementClose(encoder))
    return error;
  
  return 0;
}

ndn_Error ndn_decodeBinaryXMLName(struct ndn_Name *name, struct ndn_BinaryXMLDecoder *decoder)
{
  ndn_Error error;
  if (error = ndn_BinaryXMLDecoder_readElementStartDTag(decoder, ndn_BinaryXML_DTag_Name))
    return error;
    
  name->nComponents = 0;
  while (1) {
    int gotExpectedTag;
    if (error = ndn_BinaryXMLDecoder_peekDTag(decoder, ndn_BinaryXML_DTag_Component, &gotExpectedTag))
      return error;
    
    if (!gotExpectedTag)
      // No more components.
      break;
    
    unsigned char *component;
    unsigned int componentLen;
    if (error = ndn_BinaryXMLDecoder_readBinaryDTagElement(decoder, ndn_BinaryXML_DTag_Component, 0, &component, &componentLen))
      return error;
    
    // Add the component to the name.
    if (name->nComponents >= name->maxComponents)
      return NDN_ERROR_read_a_component_past_the_maximum_number_of_components_allowed_in_the_name;
    ndn_NameComponent_init(name->components + name->nComponents, component, componentLen);
    ++name->nComponents;
  }
  
  if (error = ndn_BinaryXMLDecoder_readElementClose(decoder))
    return error;
  
  return 0;
}