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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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* Copyright (C) 2008 Sun Microsystems
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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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* 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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* 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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#include <drizzled/function/find_in_set.h>
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/* Search after a string in a string of strings separated by ',' */
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/* Returns number of found type >= 1 or 0 if not found */
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/* This optimizes searching in enums to bit testing! */
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void Item_func_find_in_set::fix_length_and_dec()
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max_length=3; // 1-999
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agg_arg_charsets(cmp_collation, args, 2, MY_COLL_CMP_CONV, 1);
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static const char separator=',';
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int64_t Item_func_find_in_set::val_int()
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uint64_t tmp=(uint64_t) args[1]->val_int();
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if (!(null_value=args[1]->null_value || args[0]->null_value))
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String *find=args[0]->val_str(&value);
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String *buffer=args[1]->val_str(&value2);
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if ((diff=buffer->length() - find->length()) >= 0)
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const CHARSET_INFO * const cs= cmp_collation.collation;
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const char *str_begin= buffer->ptr();
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const char *str_end= buffer->ptr();
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const char *real_end= str_end+buffer->length();
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const unsigned char *find_str= (const unsigned char *) find->ptr();
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uint32_t find_str_len= find->length();
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if ((symbol_len= cs->cset->mb_wc(cs, &wc, (unsigned char*) str_end,
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(unsigned char*) real_end)) > 0)
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const char *substr_end= str_end + symbol_len;
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bool is_last_item= (substr_end == real_end);
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bool is_separator= (wc == (my_wc_t) separator);
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if (is_separator || is_last_item)
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if (is_last_item && !is_separator)
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if (!my_strnncoll(cs, (const unsigned char *) str_begin,
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find_str, find_str_len))
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return (int64_t) position;
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str_begin= substr_end;
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else if (str_end - str_begin == 0 &&
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wc == (my_wc_t) separator)
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return (int64_t) ++position;
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} /* namespace drizzled */