Function ignore_db_dirs_process_additions

sql/sql_show.cc:273–339

*/

bool
ignore_db_dirs_process_additions()
{
  ulong i;
  size_t len;
  char *ptr;
  LEX_STRING *dir;

  DBUG_ASSERT(opt_ignore_db_dirs == NULL);

  if (my_hash_init(&ignore_db_dirs_hash, 
                   lower_case_table_names ?
                     character_set_filesystem : &my_charset_bin,
                   0, 0, 0, db_dirs_hash_get_key,
                   my_free,
                   HASH_UNIQUE))
    return true;

  /* len starts from 1 because of the terminating zero. */
  len= 1;
  for (i= 0; i < ignore_db_dirs_array.elements; i++)
  {
    get_dynamic(&ignore_db_dirs_array, (uchar *) &dir, i);
    len+= dir->length + 1;                      // +1 for the comma
  }

  /* No delimiter for the last directory. */
  if (len > 1)
    len--;

  /* +1 the terminating zero */
  ptr= opt_ignore_db_dirs= (char *) my_malloc(len + 1, MYF(0));
  if (!ptr)
    return true;

  /* Make sure we have an empty string to start with. */
  *ptr= 0;

  for (i= 0; i < ignore_db_dirs_array.elements; i++)
  {
    get_dynamic(&ignore_db_dirs_array, (uchar *) &dir, i);
    if (my_hash_insert(&ignore_db_dirs_hash, (uchar *) dir))
      return true;
    ptr= strnmov(ptr, dir->str, dir->length);
    if (i + 1 < ignore_db_dirs_array.elements)
      ptr= strmov(ptr, ",");

    /*
      Set the transferred array element to NULL to avoid double free
      in case of error.
    */
    dir= NULL;
    set_dynamic(&ignore_db_dirs_array, (uchar *) &dir, i);
  }

  /* make sure the string is terminated */
  DBUG_ASSERT(ptr - opt_ignore_db_dirs <= (ptrdiff_t) len);
  *ptr= 0;