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574.3.3
by Lee
moving functions from item_strfunc to functions/str directory |
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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 <drizzled/server_includes.h> |
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#include CSTDINT_H
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670.1.20
by Monty Taylor
Renamed functions to function... everything else is singular. |
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#include <drizzled/function/str/reverse.h> |
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574.3.3
by Lee
moving functions from item_strfunc to functions/str directory |
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String *Item_func_reverse::val_str(String *str) |
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{
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assert(fixed == 1); |
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String *res = args[0]->val_str(str); |
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char *ptr, *end, *tmp; |
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if ((null_value=args[0]->null_value)) |
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return 0; |
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/* An empty string is a special case as the string pointer may be null */
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if (!res->length()) |
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return &my_empty_string; |
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if (tmp_value.alloced_length() < res->length() && |
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tmp_value.realloc(res->length())) |
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{
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null_value= 1; |
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return 0; |
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}
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tmp_value.length(res->length()); |
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tmp_value.set_charset(res->charset()); |
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ptr= (char *) res->ptr(); |
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end= ptr + res->length(); |
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tmp= (char *) tmp_value.ptr() + tmp_value.length(); |
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#ifdef USE_MB
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if (use_mb(res->charset())) |
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{
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register uint32_t l; |
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while (ptr < end) |
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{
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if ((l= my_ismbchar(res->charset(),ptr,end))) |
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{
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tmp-= l; |
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memcpy(tmp,ptr,l); |
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ptr+= l; |
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}
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else
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*--tmp= *ptr++; |
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}
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}
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else
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#endif /* USE_MB */ |
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{
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while (ptr < end) |
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*--tmp= *ptr++; |
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}
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return &tmp_value; |
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}
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void Item_func_reverse::fix_length_and_dec() |
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{
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collation.set(args[0]->collation); |
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max_length = args[0]->max_length; |
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}
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