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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, Inc.
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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/str/replace.h>
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#include <drizzled/error.h>
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#include <drizzled/session.h>
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Replace all occurences of string2 in string1 with string3.
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Don't reallocate val_str() if not needed.
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Fix that this works with binary strings
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String *Item_func_replace::val_str(String *str)
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String *res,*res2,*res3;
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uint32_t from_length,to_length;
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const char *ptr,*end,*strend,*search,*search_end;
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res=args[0]->val_str(str);
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if (args[0]->null_value)
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res2=args[1]->val_str(&tmp_value);
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if (args[1]->null_value)
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res->set_charset(collation.collation);
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binary_cmp = ((res->charset()->state & MY_CS_BINSORT) || !use_mb(res->charset()));
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if (res2->length() == 0)
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if (binary_cmp && (offset=res->strstr(*res2)) < 0)
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if (!(res3=args[2]->val_str(&tmp_value2)))
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from_length= res2->length();
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to_length= res3->length();
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search_end=search+from_length;
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ptr=res->ptr()+offset;
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strend=res->ptr()+res->length();
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end=strend-from_length+1;
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i=(char*) ptr+1; j=(char*) search+1;
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while (j != search_end)
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if (*i++ != *j++) goto skip;
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offset= (int) (ptr-res->ptr());
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if (res->length()-from_length + to_length >
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session.variables.max_allowed_packet)
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push_warning_printf(&session, DRIZZLE_ERROR::WARN_LEVEL_WARN,
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ER_WARN_ALLOWED_PACKET_OVERFLOWED,
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ER(ER_WARN_ALLOWED_PACKET_OVERFLOWED),
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session.variables.max_allowed_packet);
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res=copy_if_not_alloced(str,res,res->length()+to_length);
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res->replace((uint) offset,from_length,*res3);
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offset+=(int) to_length;
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if ((l=my_ismbchar(res->charset(), ptr,strend))) ptr+=l;
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if (res->length()-from_length + to_length >
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session.variables.max_allowed_packet)
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push_warning_printf(&session, DRIZZLE_ERROR::WARN_LEVEL_WARN,
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ER_WARN_ALLOWED_PACKET_OVERFLOWED,
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ER(ER_WARN_ALLOWED_PACKET_OVERFLOWED), func_name(),
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session.variables.max_allowed_packet);
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res=copy_if_not_alloced(str,res,res->length()+to_length);
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res->replace((uint) offset,from_length,*res3);
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offset+=(int) to_length;
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while ((offset=res->strstr(*res2,(uint) offset)) >= 0);
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void Item_func_replace::fix_length_and_dec()
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uint64_t max_result_length= args[0]->max_length;
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int diff=(int) (args[2]->max_length - args[1]->max_length);
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if (diff > 0 && args[1]->max_length)
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{ // Calculate of maxreplaces
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uint64_t max_substrs= max_result_length/args[1]->max_length;
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max_result_length+= max_substrs * (uint) diff;
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if (max_result_length >= MAX_BLOB_WIDTH)
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max_result_length= MAX_BLOB_WIDTH;
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max_length= (ulong) max_result_length;
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if (agg_arg_charsets(collation, args, 3, MY_COLL_CMP_CONV, 1))
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} /* namespace drizzled */