ource revision of copy (if any). */
  svn_revnum_t copyfrom_rev;

} svn_log_changed_path_t;

/**
 * Return a deep copy of @a changed_path, allocated in @a pool.
 *
 * @since New in 1.3.
 * @deprecated Provided for backward compatibility with the 1.5 API.
 */
SVN_DEPRECATED
svn_log_changed_path_t *
svn_log_changed_path_dup(const svn_log_changed_path_t *changed_path,
                         apr_pool_t *pool);

/**
 * A structure to represent all the information about a particular log entry.
 *
 * @note To allow for extending the #svn_log_entry_t structure in future
 * releases, always use svn_log_entry_create() to allocate the structure.
 *
 * @since New in 1.5.
 */
typedef struct svn_log_entry_t
{
  /** A hash containing as keys every path committed in @a revision; the
   * values are (#svn_log_changed_path_t *) structures.
   *
   * The subversion core libraries will always set this field to the same
   * value as changed_paths2 for compatibility reasons.
   *
   * @deprecated Provided for backward compatibility with the 1.5 API.
   */
  apr_hash_t *changed_paths;

  /** The revision of the commit. */
  svn_revnum_t revision;

  /** The hash of requested revision properties, which may be NULL if it
   * would contain no revprops.  Maps (const char *) property name to
   * (svn_string_t *) property value. */
  apr_hash_t *revprops;

  /**
   * Whether or not this message has children.
   *
   * When a log operation requests additional merge information, extra log
   * entries may be returned as a result of this entry.  The new entries, are
   * considered children of the original entry, and will follow it.  When
   * the HAS_CHILDREN flag is set, the receiver should increment its stack
   * depth, and wait until an entry is provided with SVN_INVALID_REVNUM which
   * indicates the end of the children.
   *
   * For log operations which do not request additional merge information, the
   * HAS_CHILDREN flag is always FALSE.
   *
   * For more information see:
   * https://svn.apache.org/repos/asf/subversion/trunk/notes/merge-tracking/design.html#commutative-reporting
   */
  svn_boolean_t has_children;

  /** A hash containing as keys every path committed in @a revision; the
   * values are (#svn_log_changed_path2_t *) structures.
   *
   * If this value is not @c NULL, it MUST have the same value as
   * changed_paths or svn_log_entry_dup() will not create an identical copy.
   *
   * The subversion core libraries will always set this field to the same
   * value as changed_paths for compatibility with users assuming an older
   * version.
   *
   * @note See http://svn.haxx.se/dev/archive-2010-08/0362.shtml for
   * further explanation.
   *
   * @since New in 1.6.
   */
  apr_hash_t *changed_paths2;

  /**
   * Whether @a revision should be interpreted as non-inheritable in the
   * same sense of #svn_merge_range_t.
   *
   * Only set when this #svn_log_entry_t instance is returned by the
   * libsvn_client mergeinfo apis. Currently always FALSE when the
   * #svn_log_entry_t instance is reported by the ra layer.
   *
   * @since New in 1.7.
   */
  svn_boolean_t non_inheritable;

  /**
   * Whether @a revision is a merged revision resulting from a reverse merge.
   *
   * @since New in 1.7.
   */
  svn_boolean_t subtractive_merge;

  /* NOTE: Add new fields at the end to preserve binary compatibility.
     Also, if you add fields here, you have to update
     svn_log_entry_dup(). */
} svn_log_entry_t;

/**
 * Returns an #svn_log_entry_t, allocated in @a pool with all fields
 * initialized to NULL values.
 *
 * @note To allow for extending the #svn_log_entry_t structure in future
 * releases, this function should always be used to allocate the structure.
 *
 * @since New in 1.5.
 */
svn_log_entry_t *
svn_log_entry_create(apr_pool_t *pool);

/** Return a deep copy of @a log_entry, allocated in @a pool.
 *
 * The resulting svn_log_entry_t has @c changed_paths set to the same
 * value as @c changed_path2. @c changed_paths will be @c NULL if
 * @c changed_paths2 was @c NULL.
 *
 * @since New in 1.6.
 */
svn_log_entry_t *
svn_log_entry_dup(const svn_log_entry_t *log_entry, apr_pool_t *pool);

/** The callback invoked by log message loopers, such as
 * #svn_ra_plugin_t.get_log() and svn_repos_get_logs().
 *
 * This function is invoked once on each log message, in the order
 * determined by the caller (see above-mentioned functions).
 *
 * @a baton is what you think it is, and @a log_entry contains relevant
 * information for the log message.  Any of @a log_entry->author,
 * @a log_entry->date, or @a log_entry->message may be @c NULL.
 *
 * If @a log_entry->date is neither NULL nor the empty string, it was
 * generated by svn_time_to_cstring() and can be converted to
 * @c apr_time_t with svn_time_from_cstring().
 *
 * If @a log_entry->changed_paths is non-@c NULL, then it contains as keys
 * every path committed in @a log_entry->revision; the values are
 * (#svn_log_changed_path_t *) structures.
 *
 * If @a log_entry->has_children is @c TRUE, the message will be followed
 * immediately by any number of merged revisions (child messages), which are
 * terminated by an invocation with SVN_INVALID_REVNUM.  This usage may
 * be recursive.
 *
 * Use @a pool for temporary allocation.  If the caller is iterating
 * over log messages, invoking this receiver on each, we recommend the
 * standard pool loop recipe: create a subpool, pass it as @a pool to
 * each call, clear it after each iteration, destroy it after the loop
 * is done.  (For allocation that must last beyond the lifetime of a
 * given receiver call, use a pool in @a baton.)
 *
 * @since New in 1.5.
 */
typedef svn_error_t *(*svn_log_entry_receiver_t)(
  void *baton,
  svn_log_entry_t *log_entry,
  apr_pool_t *pool);

/**
 * Similar to #svn_log_entry_receiver_t, except this uses separate
 * parameters for each part of the log entry.
 *
 * @deprecated Provided for backward compatibility with the 1.4 API.
 */
typedef svn_error_t *(*svn_log_message_receiver_t)(
  void *baton,
  apr_hash_t *changed_paths,
  svn_revnum_t revision,
  const char *author,
  const char *date,  /* use svn_time_from_cstring() if need apr_time_t */
  const char *message,
  apr_pool_t *pool);