p->nOrig = p->c.nTo;
  return 0;
}

/*
** The input pParent is the next most recent ancestor of the file
** being annotated.  Do another step of the annotation.  Return true
** if additional annotation is required.  zPName is the tag to insert
** on each line of the file being annotated that was contributed by
** pParent.  Memory to hold zPName is leaked.
*/
static int annotation_step(Annotator *p, Blob *pParent, int iVers, u64 diffFlags){
  int i, j;
  int lnTo;

  /* Prepare the parent file to be diffed */
  p->c.aFrom = break_into_lines(blob_str(pParent), blob_size(pParent),

/* Annotation flags (any DIFF flag can be used as Annotation flag as well) */
#define ANN_FILE_VERS   (((u64)0x20)<<32) /* Show file vers rather than commit vers */
#define ANN_FILE_ANCEST (((u64)0x40)<<32) /* Prefer check-ins in the ANCESTOR table */

/*
** Compute a complete annotation on a file.  The file is identified
** by its filename number (filename.fnid) and the baseline in which
** it was checked in (mlink.mid).
*/
static void annotate_file(
  Annotator *p,        /* The annotator */
  int fnid,            /* The name of the file to be annotated */
  int mid,             /* Use the version of the file in this check-in */
  int iLimit,          /* Limit the number of levels if greater than zero */
  u64 annFlags         /* Flags to alter the annotation */