1
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
4
* Copyright (C) 2008 Sun Microsystems
6
* This program is free software; you can redistribute it and/or modify
7
* it under the terms of the GNU General Public License as published by
8
* the Free Software Foundation; version 2 of the License.
10
* This program is distributed in the hope that it will be useful,
11
* but WITHOUT ANY WARRANTY; without even the implied warranty of
12
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
* GNU General Public License for more details.
15
* You should have received a copy of the GNU General Public License
16
* along with this program; if not, write to the Free Software
17
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20
#include <drizzled/server_includes.h>
22
#include <drizzled/function/str/insert.h>
23
#include <drizzled/error.h>
24
#include <drizzled/session.h>
26
String *Item_func_insert::val_str(String *str)
30
int64_t start, length; /* must be int64_t to avoid truncation */
33
res=args[0]->val_str(str);
34
res2=args[3]->val_str(&tmp_value);
35
start= args[1]->val_int() - 1;
36
length= args[2]->val_int();
38
if (args[0]->null_value || args[1]->null_value || args[2]->null_value ||
40
goto null; /* purecov: inspected */
42
if ((start < 0) || (start > res->length()))
43
return res; // Wrong param; skip insert
44
if ((length < 0) || (length > res->length()))
45
length= res->length();
47
/* start and length are now sufficiently valid to pass to charpos function */
48
start= res->charpos((int) start);
49
length= res->charpos((int) length, (uint32_t) start);
51
/* Re-testing with corrected params */
52
if (start > res->length())
53
return res; /* purecov: inspected */ // Wrong param; skip insert
54
if (length > res->length() - start)
55
length= res->length() - start;
57
if ((uint64_t) (res->length() - length + res2->length()) >
58
(uint64_t) current_session->variables.max_allowed_packet)
60
push_warning_printf(current_session, DRIZZLE_ERROR::WARN_LEVEL_WARN,
61
ER_WARN_ALLOWED_PACKET_OVERFLOWED,
62
ER(ER_WARN_ALLOWED_PACKET_OVERFLOWED),
63
func_name(), current_session->variables.max_allowed_packet);
66
res=copy_if_not_alloced(str,res,res->length());
67
res->replace((uint32_t) start,(uint32_t) length,*res2);
75
void Item_func_insert::fix_length_and_dec()
77
uint64_t max_result_length;
79
// Handle character set for args[0] and args[3].
80
if (agg_arg_charsets(collation, &args[0], 2, MY_COLL_ALLOW_CONV, 3))
82
max_result_length= ((uint64_t) args[0]->max_length+
83
(uint64_t) args[3]->max_length);
84
if (max_result_length >= MAX_BLOB_WIDTH)
86
max_result_length= MAX_BLOB_WIDTH;
89
max_length= (ulong) max_result_length;