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Viewing changes to drizzled/function/str/weight_string.cc

  • Committer: Monty Taylor
  • Date: 2010-03-11 18:27:20 UTC
  • mfrom: (1333 staging)
  • mto: This revision was merged to the branch mainline in revision 1348.
  • Revision ID: mordred@inaugust.com-20100311182720-hd1h87y6cb1b1mp0
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drizzled/function/str/weight_string.cc
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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 *
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 *  Copyright (C) 2008 Sun Microsystems
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; version 2 of the License.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#include "config.h"
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#include <drizzled/function/str/weight_string.h>
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#include <algorithm>
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using namespace std;
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namespace drizzled
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{
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void Item_func_weight_string::fix_length_and_dec()
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{
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  const CHARSET_INFO * const cs= args[0]->collation.collation;
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  collation.set(&my_charset_bin, args[0]->collation.derivation);
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  flags= my_strxfrm_flag_normalize(flags, cs->levels_for_order);
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  max_length= cs->mbmaxlen * max(args[0]->max_length, nweights);
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  maybe_null= 1;
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}
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/* Return a weight_string according to collation */
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String *Item_func_weight_string::val_str(String *str)
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{
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  String *res;
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  const CHARSET_INFO * const cs= args[0]->collation.collation;
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  uint32_t tmp_length, frm_length;
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  assert(fixed == 1);
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  if (args[0]->result_type() != STRING_RESULT ||
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      !(res= args[0]->val_str(str)))
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    goto nl;
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  tmp_length= cs->coll->strnxfrmlen(cs, cs->mbmaxlen *
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                                        max(res->length(), nweights));
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  if (tmp_value.alloc(tmp_length))
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    goto nl;
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  frm_length= cs->coll->strnxfrm(cs,
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                                 (unsigned char*) tmp_value.ptr(), tmp_length,
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                                 nweights ? nweights : tmp_length,
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                                 (const unsigned char*) res->ptr(), res->length(),
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                                 flags);
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  tmp_value.length(frm_length);
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  null_value= 0;
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  return &tmp_value;
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nl:
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  null_value= 1;
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  return 0;
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}
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} /* namespace drizzled */