1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* Some useful string utility functions used by the MySQL server */
#include "config.h"
#include "drizzled/strfunc.h"
#include "drizzled/typelib.h"
#include "drizzled/charset_info.h"
#include "drizzled/global_charset_info.h"
/*
Return bitmap for strings used in a set
SYNOPSIS
find_set()
lib Strings in set
str Strings of set-strings separated by ','
err_pos If error, set to point to start of wrong set string
err_len If error, set to the length of wrong set string
set_warning Set to 1 if some string in set couldn't be used
NOTE
We delete all end space from str before comparison
RETURN
bitmap of all sets found in x.
set_warning is set to 1 if there was any sets that couldn't be set
*/
static const char field_separator=',';
uint64_t find_set(TYPELIB *lib, const char *str, uint32_t length,
const CHARSET_INFO * const cs,
char **err_pos, uint32_t *err_len, bool *set_warning)
{
const CHARSET_INFO * const strip= cs ? cs : &my_charset_utf8_general_ci;
const char *end= str + strip->cset->lengthsp(strip, str, length);
uint64_t found= 0;
*err_pos= 0; // No error yet
if (str != end)
{
const char *start= str;
for (;;)
{
const char *pos= start;
uint32_t var_len;
int mblen= 1;
for (; pos != end && *pos != field_separator; pos++)
{}
var_len= (uint32_t) (pos - start);
uint32_t find= cs ? find_type2(lib, start, var_len, cs) :
find_type(lib, start, var_len, (bool) 0);
if (!find)
{
*err_pos= (char*) start;
*err_len= var_len;
*set_warning= 1;
}
else
found|= ((int64_t) 1 << (find - 1));
if (pos >= end)
break;
start= pos + mblen;
}
}
return found;
}
/*
Function to find a string in a TYPELIB
(Same format as mysys/typelib.c)
SYNOPSIS
find_type()
lib TYPELIB (struct of pointer to values + count)
find String to find
length Length of string to find
part_match Allow part matching of value
RETURN
0 error
> 0 position in TYPELIB->type_names +1
*/
uint32_t find_type(const TYPELIB *lib, const char *find, uint32_t length,
bool part_match)
{
uint32_t found_count=0, found_pos=0;
const char *end= find+length;
const char *i;
const char *j;
for (uint32_t pos=0 ; (j=lib->type_names[pos++]) ; )
{
for (i=find ; i != end &&
my_toupper(system_charset_info,*i) ==
my_toupper(system_charset_info,*j) ; i++, j++) ;
if (i == end)
{
if (! *j)
return(pos);
found_count++;
found_pos= pos;
}
}
return(found_count == 1 && part_match ? found_pos : 0);
}
/*
Find a string in a list of strings according to collation
SYNOPSIS
find_type2()
lib TYPELIB (struct of pointer to values + count)
x String to find
length String length
cs Character set + collation to use for comparison
NOTES
RETURN
0 No matching value
>0 Offset+1 in typelib for matched string
*/
uint32_t find_type2(const TYPELIB *typelib, const char *x, uint32_t length,
const CHARSET_INFO * const cs)
{
int pos;
const char *j;
if (!typelib->count)
{
return(0);
}
for (pos=0 ; (j=typelib->type_names[pos]) ; pos++)
{
if (!my_strnncoll(cs, (const unsigned char*) x, length,
(const unsigned char*) j, typelib->type_lengths[pos]))
return(pos+1);
}
return(0);
} /* find_type */
|