/**
 * Copyright (C) 2013 Regents of the University of California.
 * @author: Jeff Thompson <jefft0@remap.ucla.edu>
 * See COPYING for copyright and distribution information.
 */

#ifndef NDN_NAME_H
#define NDN_NAME_H

#include <ndn-cpp/c/common.h>
#include "errors.h"
#include "util/blob.h"

#ifdef __cplusplus
extern "C" {
#endif
  
/**
 * An ndn_NameComponent holds a pointer to the component value.
 */
struct ndn_NameComponent {
  struct ndn_Blob value;     /**< A Blob with a pointer to the pre-allocated buffer for the component value */
};

/**
 * 
 * @param self pointer to the ndn_NameComponent struct
 * @param value the pre-allocated buffer for the component value
 * @param valueLength the number of bytes in value
 */
static inline void ndn_NameComponent_initialize(struct ndn_NameComponent *self, uint8_t *value, size_t valueLength) 
{
  ndn_Blob_initialize(&self->value, value, valueLength);
}

/**
 * Interpret the name component as a network-ordered number and return an integer.
 * @param self A pointer to the ndn_NameComponent struct.
 * @return The integer number.
 */
uint64_t ndn_NameComponent_toNumber(struct ndn_NameComponent *self);

/**
 * Interpret the name component as a network-ordered number with a marker and return an integer.
 * @param self A pointer to the ndn_NameComponent struct.
 * @param marker The required first byte of the component.
 * @param result Return the integer number.
 * @return 0 for success, or an error code if the first byte of the component does not equal the marker.
 */
ndn_Error ndn_NameComponent_toNumberWithMarker(struct ndn_NameComponent *self, uint8_t marker, uint64_t *result);

/**
 * An ndn_Name holds an array of ndn_NameComponent.
 */
struct ndn_Name {
  struct ndn_NameComponent *components; /**< pointer to the array of components. */
  size_t maxComponents;                 /**< the number of elements in the allocated components array */
  size_t nComponents;                   /**< the number of components in the name */
};

/**
 * Initialize an ndn_Name struct with the components array.
 * @param self pointer to the ndn_Name struct
 * @param components the pre-allocated array of ndn_NameComponent
 * @param maxComponents the number of elements in the allocated components array
 */
static inline void ndn_Name_initialize(struct ndn_Name *self, struct ndn_NameComponent *components, size_t maxComponents) 
{
  self->components = components;
  self->maxComponents = maxComponents;
  self->nComponents = 0;
}

/**
 * Return true if the N components of this name are the same as the first N components of the given name.
 * @param self A pointer to the ndn_Name struct.
 * @param name A pointer to the other name to match.
 * @return 1 if this matches the given name, 0 otherwise.  This always returns 1 if this name is empty.
 */
int ndn_Name_match(struct ndn_Name *self, struct ndn_Name *name);

/**
 * Append a component to this name with the bytes in the given array.
 * @param self pointer to the ndn_Name struct.
 * @param value The bytes of the component.  This does not copy the bytes.
 * @param valueLength The number of bytes in value.
 * @return 0 for success, or an error code if there is no more room in the components array (nComponents is already maxComponents).
 */
ndn_Error ndn_Name_appendComponent(struct ndn_Name *self, uint8_t* value, size_t valueLength);

/**
 * Append a component to this name with the bytes in the given blob.
 * @param self pointer to the ndn_Name struct.
 * @param value An ndn_Blob with the bytes of the component.  This does not copy the bytes.
 * @return 0 for success, or an error code if there is no more room in the components array (nComponents is already maxComponents).
 */
static inline ndn_Error ndn_Name_appendBlob(struct ndn_Name *self, struct ndn_Blob *value)
{
  return ndn_Name_appendComponent(self, value->value, value->length);
}

/**
 * Append a component to this name with the bytes in raw string value.
 * @param self pointer to the ndn_Name struct.
 * @param value The null-terminated string, treated as a byte array.  This does not copy the bytes.
 * @return 0 for success, or an error code if there is no more room in the components array (nComponents is already maxComponents).
 */
ndn_Error ndn_Name_appendString(struct ndn_Name *self, char* value);

#ifdef __cplusplus
}
#endif

#endif